{"id":37055,"date":"2026-05-06T14:32:07","date_gmt":"2026-05-06T06:32:07","guid":{"rendered":"https:\/\/firstmold.com\/?page_id=37055"},"modified":"2026-05-06T14:38:54","modified_gmt":"2026-05-06T06:38:54","slug":"abs-injection-molding-faq","status":"publish","type":"page","link":"https:\/\/firstmold.com\/fr\/faq\/abs-injection-molding-faq\/","title":{"rendered":"ABS Injection Molding FAQ"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"37055\" class=\"elementor elementor-37055\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-115c4f4 e-con-full faqmain_wrapper e-flex e-con e-parent\" data-id=\"115c4f4\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1106ce8 e-con-full faq-sidebar-container e-flex e-con e-child\" data-id=\"1106ce8\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-077b2a0 elementor-widget elementor-widget-html\" data-id=\"077b2a0\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n    <style>\n        body,\n        html {\n            scroll-behavior: smooth;\n            scroll-padding: 90px !important;\n        }\n\n        .faq-sidebar-container {\n            padding: 2rem 3rem;\n            background-color: #ffffff;\n            box-shadow: 2px 0 5px rgba(0, 0, 0, 0.03);\n        }\n\n        .faq-sidebar {\n            overflow-y: auto;\n            -webkit-overflow-scrolling: touch;\n        }\n\n        .faq-sidebar h1 {\n            font-size: 1.5rem;\n            color: #cc371e;\n            margin-bottom: 1rem;\n            text-align: center;\n            padding-bottom: 1rem;\n            border-bottom: 1px solid #e6e6e6;\n        }\n\n        .faq-nav-list {\n            list-style: none;\n            text-align: left;\n        }\n\n        .faq-nav-item {\n            margin-bottom: 0.8rem;\n        }\n\n        .faq-nav-link {\n            display: block;\n            padding: 0.8rem 1rem;\n            color: #151515;\n            text-decoration: none;\n            transition: background-color 0.8s;\n        }\n\n        .faq-nav-link:hover {\n            background-color: #f0f7ff;\n            color: #2e2770;\n        }\n\n        .faq-nav-link.active {\n            background-color: #f0f7ff;\n            color: #ffffff;\n        }\n\n        .faq-container h2 {\n            font-family: mulish;\n            font-weight: 800 !important;\n            color: #2e2770;\n            line-height: 1.8rem !important;\n            font-size: 1.1rem !important;\n        }\n\n        .faq-container h2:hover {\n            color: #cc371e;\n        }\n\n        .faq-answers {\n            color: #444;\n        }\n\n        @media(min-width:768px) {\n            .faqmain_wrapper {\n                align-items: start;\n            }\n\n            .faq-sidebar-container {\n                position: sticky !important;\n                top: 60px !important;\n            }\n        }\n    <\/style>\n    <div class=\"faq-sidebar\">\n\n         <h1 class=\"faq-page-title\">\n\t\t\t ABS Injection Molding FAQ\t\t<\/h1>\n\t\t\n\t\t<p>This page answers injection molding questions about ABS.<\/p>\n\n\n        <ul class=\"faq-nav-list\">\n\n            \n                \n                    <li class=\"faq-nav-item\">\n                        <a href=\"#Design-Guidelines\" class=\"faq-nav-link\">\n                            Design Guidelines                        <\/a>\n                    <\/li>\n\n                \n                    <li class=\"faq-nav-item\">\n                        <a href=\"#Processing-Parameters\" class=\"faq-nav-link\">\n                            Processing &amp; Parameters                        <\/a>\n                    <\/li>\n\n                \n                    <li class=\"faq-nav-item\">\n                        <a href=\"#Defect-Troubleshooting\" class=\"faq-nav-link\">\n                            Defect Troubleshooting                        <\/a>\n                    <\/li>\n\n                \n            \n        <\/ul>\n\n    <\/div>\n\n    \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-093c0be e-con-full faq-container e-flex e-con e-child\" data-id=\"093c0be\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-68554e4 elementor-widget elementor-widget-html\" data-id=\"68554e4\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\n    <style id=\"faq_page_css\" data-no-optimize=\"1\" nowprocket>\n        .faq-box {\n            background-color: #ffffff;\n            padding: 2rem;\n            margin-bottom: 2rem;\n            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);\n        }\n\n        .faq-box-divider {\n            height: 1px;\n            background-color: #e6e6e6;\n            margin: 1rem 0 1.5rem 0;\n        }\n\n        .faq-item {\n            border-bottom: 1px solid #f0f0f0;\n            padding: 1.2rem 0;\n            overflow: hidden;\n            transition: all 0.3s ease;\n        }\n\n        .faq-item:last-child {\n            border-bottom: none;\n        }\n\n        .faq-question-wrap {\n            display: flex;\n            justify-content: space-between;\n            align-items: flex-start;\n            cursor: pointer;\n            width: 100%;\n        }\n\n        .faq-question-content {\n            flex: 1;\n            margin-right: 1rem;\n        }\n\n        .faq-question {\n            font-size: 1rem;\n            color: #151515;\n            font-weight: 500;\n            margin: 0 0 0.5rem 0;\n            transition: color 0.3s ease;\n        }\n\n        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    transition: max-height 0.5s ease, padding 0.5s ease;\n            padding-left: 0;\n        }\n\n        .faq-item.active .faq-question {\n            color: #cc371e;\n        }\n\n        .faq-item.active .faq-long-answer {\n            max-height: 2000px;\n            padding-left: 0.5rem;\n        }\n\n        .faq-item.active .toggle-icon {\n            content: '-';\n            transform: none;\n        }\n\n        @media (max-width: 768px) {\n            .faq-box {\n                padding: 1.5rem;\n            }\n\n            .faq-question {\n                font-size: 0.95rem;\n            }\n        }\n    <\/style>\n    <div class=\"faq-container\">\n\n        \n            \n                <div class=\"faq-box\" id=\"Design-Guidelines\">\n\n                    <h2>Design Guidelines<\/h2>\n\n                    <div class=\"faq-box-divider\"><\/div>\n\n                    <div class=\"faq-items\">\n\n                        \n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                Can ABS be used for injection molding?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                Yes, Acrylonitrile Butadiene Styrene (ABS) is a common and versatile thermoplastic used for injection molding.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>As a thermoplastic, ABS melts at around 105\u00b0C (221\u00b0F), allowing manufacturers to inject it into a mold. When it solidifies upon cooling, it takes the shape of the mold. ABS is favored over other thermoplastics for producing rigid, durable products with a high-quality surface finish. See the wide range of <strong><a href=\"https:\/\/firstmold.com\/abs-injection-molding\/\">ABS injection molding applications here<\/a>.<\/strong><\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What is the minimum wall thickness for ABS?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                The recommended minimum wall thickness for ABS injection molding usually ranges from 1.14 mm to 1.2 mm, with a maximum of around 3.56 mm.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>A wall thickness of 1.14mm to 1.2mm is ideal for making small parts with ABS, particularly where sinks must be avoided. To balance molding efficiency and structural rigidity, the ideal range for functional components is 1.5mm to 2.5mm. The maximum thickness of &lt;3.56 mm is used for larger parts. However, thicker parts are prone to warping, excessive cooling time, and surface deformation.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What is the rule for draft angles in ABS injection molding?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                When using ABS for injection molding, apply a minimum of 0.5\u00b0 to 1\u00b0 draft angles to either side for smooth, shallow surfaces.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>For ribs, textured surfaces, or deeper parts, increase to 2\u00b0 or more to minimize the risk of damage during ejection. As a general rule of thumb, for every 0.001 inch of texture depth, add 1\u00b0 to 1.5\u00b0 extra draft. The reason is that rougher surfaces cause more friction.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What to consider during ABS rib design                                             <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                When designing ribs for ABS injection molding, you must consider the rib thickness, height, rib draft angle, rib base radii, spacing, and orientation.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>Optimizing the ribs helps to maximize structural strength and avoid common molding defects. The table below provides a guideline on best practices for rib optimization.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Rib Parameters<\/th>\n<th>Best Practice Guideline for ABS<\/th>\n<\/tr>\n<tr>\n<td>Thickness<\/td>\n<td>\u226450% of nominal wall<\/td>\n<\/tr>\n<tr>\n<td>Height<\/td>\n<td>\u2264 3x nominal wall thickness<\/td>\n<\/tr>\n<tr>\n<td>Spacing<\/td>\n<td>2 to 3x nominal wall thickness<\/td>\n<\/tr>\n<tr>\n<td>Base radius<\/td>\n<td>0.25-0.5x wall thickness<\/td>\n<\/tr>\n<tr>\n<td>Draft angle<\/td>\n<td>0.5<sup>o<\/sup> to 1.5<sup>o<\/sup> per side<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What grade of ABS is used in injection molding?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                The General-Purpose ABS is the most commonly used grade because it balances rigidity, strength, and easy processing.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>Specialized grades are used for applications where the product is expected to have specific requirements. Examples of specialized grade ABS include high-impact ABS, flame-retardant ABS, high-heat ABS, plating-grade ABS, and transparent ABS. Read the detailed description of the <strong><a href=\"https:\/\/firstmold.com\/guides\/abs-plastic\/\">different types here<\/a><\/strong>.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                How does ABS vs PC impact strength compare?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                PC or Polycarbonate has superior impact resistance and tensile strength compared to ABS.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>The tensile strength of PC is approximately 10,442 psi for molded as compared to the 5,874 psi of ABS. In terms of thermal performance, PC retains its strength at higher temperatures (132\u00b0C to 138\u00b0C). ABS, on the other hand, starts to deform or fail around 97\u00b0C to 100\u00b0C.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are ABS design limitations compared to PC                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                ABS is not suitable for applications that require extreme heat resistance, durability, and optical clarity.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>ABS has poor weathering and UV resistance. It turns yellow and becomes brittle when exposed to sunlight over time. This limits its application for products intended for outdoor use. ABS\u2019s lower tensile strength also means that it cannot handle as much structural load as PC before failure. It is more prone to warping if not correctly processed.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What is ABS vs PC cooling and shrinkage?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                ABS has a lower shrinkage rate with moderate cooling needs, while PC has a higher shrinkage rate and requires slower, precise cooling to prevent warpage.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>The processing temperature of PC is higher (280<sup>o<\/sup>C to 320<sup>o<\/sup>C) and requires slow, controlled cooling to prevent extreme warpage and maintain the product integrity.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Features<\/th>\n<th>PC<\/th>\n<th>ABS<\/th>\n<\/tr>\n<tr>\n<td>Shrinkage rate<\/td>\n<td>High (0.7-1.0%)<\/td>\n<td>Low (0.4-0.7%)<\/td>\n<\/tr>\n<tr>\n<td>Cooling speed<\/td>\n<td>Controlled slow cooling<\/td>\n<td>Faster<\/td>\n<\/tr>\n<tr>\n<td>Warping potential<\/td>\n<td>High<\/td>\n<td>Moderate<\/td>\n<\/tr>\n<tr>\n<td>Dimensional stability<\/td>\n<td>Excellent<\/td>\n<td>Good<\/td>\n<\/tr>\n<tr>\n<td>Ease of use<\/td>\n<td>Difficult<\/td>\n<td>User-friendly<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                ABS injection molding vs 3D printing, which should you use?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                3D printing is best for low-volume production (100 to 1,000 units), complex geometries, or rapid prototyping. On the other hand, injection molding is best for high-volume production (over 1,000 units).                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <table>\n<tbody>\n<tr>\n<th>Feature<\/th>\n<th>ABS Injection Molding<\/th>\n<th>3D Printing (FDM\/SLS)<\/th>\n<\/tr>\n<tr>\n<td>Best volume value<\/td>\n<td>High (1,000-5,000 units)<\/td>\n<td>Low (1-500 units)<\/td>\n<\/tr>\n<tr>\n<td>Upfront cost<\/td>\n<td>Very high (tooling\/mold)<\/td>\n<td>Very low (no tooling required)<\/td>\n<\/tr>\n<tr>\n<td>Cost per part<\/td>\n<td>Very low at scale<\/td>\n<td>High (constant)<\/td>\n<\/tr>\n<tr>\n<td>Lead time<\/td>\n<td>Weeks to months<\/td>\n<td>Days (rapid)<\/td>\n<\/tr>\n<tr>\n<td>Product strength<\/td>\n<td>Very high (dense, isotropic<\/td>\n<td>Moderate (layers, aniosotropic)<\/td>\n<\/tr>\n<tr>\n<td>Design complexity<\/td>\n<td>Limited<\/td>\n<td>High<\/td>\n<\/tr>\n<tr>\n<td>Surface finish<\/td>\n<td>Smooth, glossy<\/td>\n<td>Rougher, visible layer lines<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                        \n                    <\/div>\n\n                <\/div>\n\n            \n                <div class=\"faq-box\" id=\"Processing-Parameters\">\n\n                    <h2>Processing &amp; Parameters<\/h2>\n\n                    <div class=\"faq-box-divider\"><\/div>\n\n                    <div class=\"faq-items\">\n\n                        \n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                How do ABS vs ASA drying parameters compare?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                Both ABS and ASA require similar drying parameters (75\u201390\u00b0C for 2\u20134 hours) to achieve optimum print quality.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <table>\n<tbody>\n<tr>\n<th>Parameters<\/th>\n<th>ABS<\/th>\n<th>ASA<\/th>\n<\/tr>\n<tr>\n<td>Drying temperature<\/td>\n<td>75\u00b0C \u2013 85\u00b0C (167\u2013185\u00b0F)<\/td>\n<td>80\u00b0C \u2013 90\u00b0C (176\u2013194\u00b0F)<\/td>\n<\/tr>\n<tr>\n<td>Drying time<\/td>\n<td>2 \u2013 4 Hours<\/td>\n<td>2 \u2013 4 Hours<\/td>\n<\/tr>\n<tr>\n<td>Signs of wetness<\/td>\n<td>Popping, stringing, brittle prints<\/td>\n<td>Popping, small bubbles, rough surface<\/td>\n<\/tr>\n<tr>\n<td>Hygroscopy<\/td>\n<td>Moderate<\/td>\n<td>Moderate<\/td>\n<\/tr>\n<tr>\n<td>Storage temp<\/td>\n<td>Room temperature with desiccant<\/td>\n<td>Room temperature with desiccant<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                How do you achieve a high gloss finish with ABS?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                A high gloss surface finish using ABS injection molding requires a combination of high mold temperature, injection pressure, proper material drying, and a highly polished mold surface.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>The mold cavity must be polished to an SPI A-level finish using diamond buffing. This yields a surface roughness (Ra) of 0.012 to 0.10 \u03bcm. The mold material must be made of hardened steel (e.g., S136) that maintains a high polish during high-volume production. The mold temperatures should be higher too (60\u00b0C \u2013 80\u00b0C)<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What is the optimum injection speed for ABS?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                The injection speed of ABS is set at moderate to high or medium to fast for proper filling.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>The real-world application will decide the speed to prevent defects like weld lines, burning, or short shots. In some instances, manufacturers sometimes use a multi-stage approach. Here, the speed starts moderate and is gradually adjusted depending on geometry. In some cases, different speeds are used for different sections. Thin-walled or high-gloss parts need faster speeds to ensure proper filling.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                Why is it important to optimize injection speed?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                Optimized injection speed is critical in balancing part quality with production efficiency.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>If the injection speed is too slow, the plastic will cool before fully filling the mold cavity, leading to short shots. If the speed is too high, it will cause excessive frictional heat, leading to burning. In terms of efficiency, faster injection speed reduces the total filling time and cuts down the cycle time.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What is the ideal residence time for ABS?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                To avoid thermal degradation and discoloration, the residence time of ABS in the injection molding barrel is typically 5 to 6 minutes at 265\u00b0C.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>Although the ideal duration is 5 to 6 minutes, higher temperatures will require shorter residence time. The ideal barrel temperatures are often 225\u00b0C to 250\u00b0C.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the common ABS defects and their causes?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                Burn marks, sink marks, short shots, weld lines, and warpage are the most common ABS injection molding defects.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>The cause of these defects is often improper temperature control, excessive injection speed, inadequate venting, and inadequate drying of material before molding. See the full explanation of the causes of the <strong><a href=\"https:\/\/firstmold.com\/tips\/injection-molding-defects\/\">different defects here<\/a><\/strong>.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                        \n                    <\/div>\n\n                <\/div>\n\n            \n                <div class=\"faq-box\" id=\"Defect-Troubleshooting\">\n\n                    <h2>Defect Troubleshooting<\/h2>\n\n                    <div class=\"faq-box-divider\"><\/div>\n\n                    <div class=\"faq-items\">\n\n                        \n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the common causes of ABS splay?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                It is primarily caused by trapped gases that create bubbles that rise to the surface during filling.                                            <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>The hygroscopic nature of ABS allows it to absorb moisture from the air. Improper drying below 0.1% moisture content before molding allows this moisture to cause silvery streaks or \u2018starburst\u2019 patterns on the surface of the molded part.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Splay Type<\/th>\n<th>Appearance<\/th>\n<th>Likely Cause<\/th>\n<\/tr>\n<tr>\n<td>Thermal<\/td>\n<td>Darker, comet-shaped streaks usually near sprue<\/td>\n<td>Excessive heat\/degradation<\/td>\n<\/tr>\n<tr>\n<td>Moisture<\/td>\n<td>Scattered, random, fine silvery streaks<\/td>\n<td>Improper drying\/wet material<\/td>\n<\/tr>\n<tr>\n<td>Air<\/td>\n<td>Usually forms in the last spots to fill<\/td>\n<td>Poor venting<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Shear<\/td>\n<td>Usually found immediately after the gate<\/td>\n<td>High speed or small gate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the common causes of sink marks during ABS injection molding?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                High volumetric shrinkage and uneven cooling are the primary causes of sink marks.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>Shrinkage happens when the thick, inner sections of the part solidify more slowly than the outer skin, pulling the surface inward. Some of the common causes of sink marks in ABS injection molding include:<\/p>\n<ul>\n<li>Non-uniform wall thickness<\/li>\n<li>Excessive thickness<\/li>\n<li>Insufficient packing or holding pressure<\/li>\n<li>Excessive melt temperature<\/li>\n<li>Insufficient cooling time<\/li>\n<li>Ineffective cooling channels<\/li>\n<li>Poor venting<\/li>\n<\/ul>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the common causes of short shots in ABS?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                This defect arises when the molten ABS fails to properly fill the mold cavity, leading to incomplete parts.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>Short shots will mostly arise when the processing parameters are not properly optimized or when there is a mold design flaw. In most cases, the problem can be solved by optimizing mold design and processing parameters as highlighted in the table below.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Category<\/th>\n<th>Possible cause<\/th>\n<th>Potential solution<\/th>\n<\/tr>\n<tr>\n<td>Material<\/td>\n<td>High moisture content<\/td>\n<td>Dry at 80\u00b0C \u2013 90\u00b0C for 2-4 hours<\/td>\n<\/tr>\n<tr>\n<td>Machine<\/td>\n<td>Insufficient shot size<\/td>\n<td>Increase shot volume<\/td>\n<\/tr>\n<tr>\n<td>Process<\/td>\n<td>Low injection speed\/pressure and melt\/mold temperature<\/td>\n<td>Increase injection speed\/pressure and barrel\/mold temperature<\/td>\n<\/tr>\n<tr>\n<td>mold<\/td>\n<td>Poor venting and restricted gates\/runners<\/td>\n<td>Add or clean clogged vent slots and enlarge gates\/runners<\/td>\n<\/tr>\n<tr>\n<td>Equipment<\/td>\n<td>Worn screw\/check ring<\/td>\n<td>Replace worn parts<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the common causes of ABS deformation?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                ABS deformation or warping is mostly caused by uneven or rapid thermal contractions during cooling, due to the material\u2019s high coefficient of thermal expansion.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>Variation in wall thickness leads to uneven shrinkage. Likewise, excessively high or unbalanced mold temperature can cause improper cooling, which leads to warping. High shear forces resulting from high injection speed can lead to twisting or warping.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the causes of ABS burn marks?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                The primary cause of burn marks on ABS injection molded parts is trapped air within the mold cavity being compressed and heated to the ignition point, leading to dark, charred surface streaks.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>If the mold is not adequately vented, during filling, the air has nowhere to go, leading to burn at the end-of-fill zones. Air can also get trapped in ribs and bosses because of their enclosed nature.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                                <div class=\"faq-item auto-schema-faq-item\" id=\"\">\n\n                                    <div class=\"faq-question-wrap\">\n\n                                        <div class=\"faq-question-content\">\n\n                                            <h3 class=\"faq-question\">\n                                                What are the common causes of ABS flow lines?                                            <\/h3>\n\n                                            <span class=\"faq-short-answer\">\n                                                Improper processing parameters, uneven material cooling, and poor mold design are the key factors that can lead to flow lines.                                             <\/span>\n\n                                        <\/div>\n\n                                        <button class=\"faq-toggle-btn\">\n                                            <span class=\"toggle-icon\">+<\/span>\n                                        <\/button>\n\n                                    <\/div>\n\n                                    <div class=\"faq-long-answer\">\n                                        <p>If the ABS resin is not sufficiently heated, it will become too viscous and will not evenly fill the mold, leading to flow lines. Also, if the mold surface is too cold, the molten plastic will cool quickly upon contact, forming a \u2018skin\u2019. The remaining molten plastic must force through the skin, which leaves visible marks.<\/p>\n                                    <\/div>\n\n                                <\/div>\n\n                            \n                        \n                    <\/div>\n\n                <\/div>\n\n            \n        \n    <\/div>\n    <script>\n        document.addEventListener('DOMContentLoaded', function () {\n            const toggleBtns = document.querySelectorAll('.faq-toggle-btn');\n            const faqItems = document.querySelectorAll('.faq-item');\n            function closeAllFaq(exceptItem = null) {\n                faqItems.forEach(item => {\n                    if (item !== exceptItem) {\n                        item.classList.remove('active');\n                        item.querySelector('.faq-long-answer').style.maxHeight = '0';\n                        item.querySelector('.toggle-icon').textContent = '+';\n                    }\n                });\n            }\n            toggleBtns.forEach(btn => {\n                btn.addEventListener('click', function (e) {\n                    e.preventDefault();\n                    const faqItem = this.closest('.faq-item');\n                    const isActive = faqItem.classList.contains('active');\n                    const longAnswer = faqItem.querySelector('.faq-long-answer');\n                    const toggleIcon = this.querySelector('.toggle-icon');\n                    closeAllFaq(isActive ? null : faqItem);\n                    if (isActive) {\n                        faqItem.classList.remove('active');\n                        longAnswer.style.maxHeight = '0';\n                        toggleIcon.textContent = '+';\n                    } else {\n                        faqItem.classList.add('active');\n                        longAnswer.style.maxHeight = longAnswer.scrollHeight + 'px';\n                        toggleIcon.textContent = '-';\n                        setTimeout(() => {\n                            faqItem.scrollIntoView({\n                                behavior: 'smooth',\n                                block: 'nearest'\n                            });\n                        }, 300);\n                    }\n                });\n            });\n        });\n    <\/script>\n    <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can ABS be used for injection molding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"As a thermoplastic, ABS melts at around 105\u00b0C (221\u00b0F), allowing manufacturers to inject it into a mold. When it solidifies upon cooling, it takes the shape of the mold. ABS is favored over other thermoplastics for producing rigid, durable products with a high-quality surface finish. See the wide range of ABS injection molding applications here.\"}},{\"@type\":\"Question\",\"name\":\"What is the minimum wall thickness for ABS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A wall thickness of 1.14mm to 1.2mm is ideal for making small parts with ABS, particularly where sinks must be avoided. To balance molding efficiency and structural rigidity, the ideal range for functional components is 1.5mm to 2.5mm. The maximum thickness of &lt;3.56 mm is used for larger parts. However, thicker parts are prone to warping, excessive cooling time, and surface deformation.\"}},{\"@type\":\"Question\",\"name\":\"What is the rule for draft angles in ABS injection molding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For ribs, textured surfaces, or deeper parts, increase to 2\u00b0 or more to minimize the risk of damage during ejection. As a general rule of thumb, for every 0.001 inch of texture depth, add 1\u00b0 to 1.5\u00b0 extra draft. The reason is that rougher surfaces cause more friction.\"}},{\"@type\":\"Question\",\"name\":\"What to consider during ABS rib design\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Optimizing the ribs helps to maximize structural strength and avoid common molding defects. The table below provides a guideline on best practices for rib optimization.\\n\\n\\n\\nRib Parameters\\nBest Practice Guideline for ABS\\n\\n\\nThickness\\n\u226450% of nominal wall\\n\\n\\nHeight\\n\u2264 3x nominal wall thickness\\n\\n\\nSpacing\\n2 to 3x nominal wall thickness\\n\\n\\nBase radius\\n0.25-0.5x wall thickness\\n\\n\\nDraft angle\\n0.5o to 1.5o per side\"}},{\"@type\":\"Question\",\"name\":\"What grade of ABS is used in injection molding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Specialized grades are used for applications where the product is expected to have specific requirements. Examples of specialized grade ABS include high-impact ABS, flame-retardant ABS, high-heat ABS, plating-grade ABS, and transparent ABS. Read the detailed description of the different types here.\"}},{\"@type\":\"Question\",\"name\":\"How does ABS vs PC impact strength compare?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The tensile strength of PC is approximately 10,442 psi for molded as compared to the 5,874 psi of ABS. In terms of thermal performance, PC retains its strength at higher temperatures (132\u00b0C to 138\u00b0C). ABS, on the other hand, starts to deform or fail around 97\u00b0C to 100\u00b0C.\"}},{\"@type\":\"Question\",\"name\":\"What are ABS design limitations compared to PC\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ABS has poor weathering and UV resistance. It turns yellow and becomes brittle when exposed to sunlight over time. This limits its application for products intended for outdoor use. ABS\u2019s lower tensile strength also means that it cannot handle as much structural load as PC before failure. It is more prone to warping if not correctly processed.\"}},{\"@type\":\"Question\",\"name\":\"What is ABS vs PC cooling and shrinkage?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The processing temperature of PC is higher (280oC to 320oC) and requires slow, controlled cooling to prevent extreme warpage and maintain the product integrity.\\n\\n\\n\\nFeatures\\nPC\\nABS\\n\\n\\nShrinkage rate\\nHigh (0.7-1.0%)\\nLow (0.4-0.7%)\\n\\n\\nCooling speed\\nControlled slow cooling\\nFaster\\n\\n\\nWarping potential\\nHigh\\nModerate\\n\\n\\nDimensional stability\\nExcellent\\nGood\\n\\n\\nEase of use\\nDifficult\\nUser-friendly\"}},{\"@type\":\"Question\",\"name\":\"ABS injection molding vs 3D printing, which should you use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Feature\\nABS Injection Molding\\n3D Printing (FDM\/SLS)\\n\\n\\nBest volume value\\nHigh (1,000-5,000 units)\\nLow (1-500 units)\\n\\n\\nUpfront cost\\nVery high (tooling\/mold)\\nVery low (no tooling required)\\n\\n\\nCost per part\\nVery low at scale\\nHigh (constant)\\n\\n\\nLead time\\nWeeks to months\\nDays (rapid)\\n\\n\\nProduct strength\\nVery high (dense, isotropic\\nModerate (layers, aniosotropic)\\n\\n\\nDesign complexity\\nLimited\\nHigh\\n\\n\\nSurface finish\\nSmooth, glossy\\nRougher, visible layer lines\"}},{\"@type\":\"Question\",\"name\":\"How do ABS vs ASA drying parameters compare?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Parameters\\nABS\\nASA\\n\\n\\nDrying temperature\\n75\u00b0C \u2013 85\u00b0C (167\u2013185\u00b0F)\\n80\u00b0C \u2013 90\u00b0C (176\u2013194\u00b0F)\\n\\n\\nDrying time\\n2 \u2013 4 Hours\\n2 \u2013 4 Hours\\n\\n\\nSigns of wetness\\nPopping, stringing, brittle prints\\nPopping, small bubbles, rough surface\\n\\n\\nHygroscopy\\nModerate\\nModerate\\n\\n\\nStorage temp\\nRoom temperature with desiccant\\nRoom temperature with desiccant\"}},{\"@type\":\"Question\",\"name\":\"How do you achieve a high gloss finish with ABS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The mold cavity must be polished to an SPI A-level finish using diamond buffing. This yields a surface roughness (Ra) of 0.012 to 0.10 \u03bcm. The mold material must be made of hardened steel (e.g., S136) that maintains a high polish during high-volume production. The mold temperatures should be higher too (60\u00b0C \u2013 80\u00b0C)\"}},{\"@type\":\"Question\",\"name\":\"What is the optimum injection speed for ABS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The real-world application will decide the speed to prevent defects like weld lines, burning, or short shots. In some instances, manufacturers sometimes use a multi-stage approach. Here, the speed starts moderate and is gradually adjusted depending on geometry. In some cases, different speeds are used for different sections. Thin-walled or high-gloss parts need faster speeds to ensure proper filling.\"}},{\"@type\":\"Question\",\"name\":\"Why is it important to optimize injection speed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"If the injection speed is too slow, the plastic will cool before fully filling the mold cavity, leading to short shots. If the speed is too high, it will cause excessive frictional heat, leading to burning. In terms of efficiency, faster injection speed reduces the total filling time and cuts down the cycle time.\"}},{\"@type\":\"Question\",\"name\":\"What is the ideal residence time for ABS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Although the ideal duration is 5 to 6 minutes, higher temperatures will require shorter residence time. The ideal barrel temperatures are often 225\u00b0C to 250\u00b0C.\"}},{\"@type\":\"Question\",\"name\":\"What are the common ABS defects and their causes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The cause of these defects is often improper temperature control, excessive injection speed, inadequate venting, and inadequate drying of material before molding. See the full explanation of the causes of the different defects here.\"}},{\"@type\":\"Question\",\"name\":\"What are the common causes of ABS splay?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The hygroscopic nature of ABS allows it to absorb moisture from the air. Improper drying below 0.1% moisture content before molding allows this moisture to cause silvery streaks or \u2018starburst\u2019 patterns on the surface of the molded part.\\n\\n\\n\\nSplay Type\\nAppearance\\nLikely Cause\\n\\n\\nThermal\\nDarker, comet-shaped streaks usually near sprue\\nExcessive heat\/degradation\\n\\n\\nMoisture\\nScattered, random, fine silvery streaks\\nImproper drying\/wet material\\n\\n\\nAir\\nUsually forms in the last spots to fill\\nPoor venting\\n\\n\\n\\nShear\\nUsually found immediately after the gate\\nHigh speed or small gate\"}},{\"@type\":\"Question\",\"name\":\"What are the common causes of sink marks during ABS injection molding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Shrinkage happens when the thick, inner sections of the part solidify more slowly than the outer skin, pulling the surface inward. Some of the common causes of sink marks in ABS injection molding include:\\n\\nNon-uniform wall thickness\\nExcessive thickness\\nInsufficient packing or holding pressure\\nExcessive melt temperature\\nInsufficient cooling time\\nIneffective cooling channels\\nPoor venting\"}},{\"@type\":\"Question\",\"name\":\"What are the common causes of short shots in ABS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Short shots will mostly arise when the processing parameters are not properly optimized or when there is a mold design flaw. In most cases, the problem can be solved by optimizing mold design and processing parameters as highlighted in the table below.\\n\\n\\n\\nCategory\\nPossible cause\\nPotential solution\\n\\n\\nMaterial\\nHigh moisture content\\nDry at 80\u00b0C \u2013 90\u00b0C for 2-4 hours\\n\\n\\nMachine\\nInsufficient shot size\\nIncrease shot volume\\n\\n\\nProcess\\nLow injection speed\/pressure and melt\/mold temperature\\nIncrease injection speed\/pressure and barrel\/mold temperature\\n\\n\\nmold\\nPoor venting and restricted gates\/runners\\nAdd or clean clogged vent slots and enlarge gates\/runners\\n\\n\\nEquipment\\nWorn screw\/check ring\\nReplace worn parts\"}},{\"@type\":\"Question\",\"name\":\"What are the common causes of ABS deformation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Variation in wall thickness leads to uneven shrinkage. Likewise, excessively high or unbalanced mold temperature can cause improper cooling, which leads to warping. High shear forces resulting from high injection speed can lead to twisting or warping.\"}},{\"@type\":\"Question\",\"name\":\"What are the causes of ABS burn marks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"If the mold is not adequately vented, during filling, the air has nowhere to go, leading to burn at the end-of-fill zones. Air can also get trapped in ribs and bosses because of their enclosed nature.\"}},{\"@type\":\"Question\",\"name\":\"What are the common causes of ABS flow lines?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"If the ABS resin is not sufficiently heated, it will become too viscous and will not evenly fill the mold, leading to flow lines. Also, if the mold surface is too cold, the molten plastic will cool quickly upon contact, forming a \u2018skin\u2019. The remaining molten plastic must force through the skin, which leaves visible marks.\"}}]}<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Injection Molding FAQ related to ABS material<\/p>","protected":false},"author":5,"featured_media":37051,"parent":702,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-37055","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>ABS Injection Molding FAQ<\/title>\n<meta name=\"description\" content=\"Injection Molding FAQ related to ABS material - Analyzing ABS injection molding from multiple dimensions (Design Guidelines, Parameters, etc.)\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/firstmold.com\/fr\/faq\/abs-injection-molding-faq\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ABS Injection Molding FAQ\" \/>\n<meta property=\"og:description\" content=\"Injection Molding FAQ related to ABS material - 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