Insert Molding

Functional Insert Molded Parts and Components

Firstmold is a leading tooling design and insert molding manufacturer that has been providing injection molding solutions for over 10 years. Our insert molding services produces custom prototypes and on-demand parts within 14 days to fit a wide array of applications. We use both steel and aluminum molds, helping our clients strike the right balance between cost and volume when making parts from a range of thermoplastic and silicone rubber materials. Our reputation as a quality injection molding company is rivalled only by the perfection we bring to all of your projects. Our team of experts cross across design to production and post-processing, offering support every step of the way. With other complimentary solutions like CNC machining and 3D Printing, Firstmold is uniquely placed to deliver functional, high-quality parts made from insert molding by leveraging technical experience to optimize your design and production.

Our Advantages and Benefits for your Manufacturing

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Shorter leadtimes to gain market edge

Got tight deadlines? Looking to beat the competition? Our in-house capacity and network of vetted manufacturing suppliers is all you need to get your part into production in no-time.

Unbeatable Design Support

Our design team consists of experts that will help bring the best value out of your project. From our practical design-for-manufacturing evaluation to our immense attention to detail, you can be assured of making beautiful, functional designs every time you work with us. We open your project to different design possibilities and complex geometric configurations, all made feasible with CNC machining and precision injection molding

Tight Tolerances

At Firstmold, we are capable of using optimized processes to make perfect insert molded components with high precision and tolerances of up to 0.010”. Should tighter tolerances be required, we shall evaluate the feasibility, while leadtimes and production costs will increase.

Zero MOQs

At Firstmold, we work with every client irrespective of their volume needs. Our quality injection molding solutions are open to everyone. We have zero minimum order quantities to meet the budget or production requirements of all our clients.

Many more options to fit your needs

With our different combinations of material and substrate, Firstmold is capable of making parts with a variety of properties to match their end applications. What do you need? Slip-resistance, enhanced grip, improved ergonomics? Whatever your job requirement entails, Firstmold’s capabilities in insert molding provides an unbeatable avenue to improve your part functionality and design options.

One-stop-shop Services

Firstmold is with you from start to finish. Our complete suite of services mean that we will be with you from design validation to insert molding, post-processing and other finishing services. We simply don’t stop until your end product emerges exactly how you envisioned it.

Multiple Applications
Firstmold Insert molding can be applied for bridge tooling, functional prototyping, low-volume manufacturing and pilot runs with inexpensive Aluminum tooling to fulfil varying purposes in the product development cycle.

See What Our Customers Said

“When we first requested CNC machining, we tried to contact First Part.They responded within hours with prices, delivery times and suggestions for our requirements. I am really satisfied with their professional service and high quality control. I would recommend them to my friends Without hesitation.”

──Brown Abraham

“We have been cooperated with First Part in CNC machining for 6 years. From design to finished product delivery, First Part provides excellent CNC machining professional services and high quality products. Normally, within 12 hours or shorter which helps a lot. We feel they are one of the best CNC machine shop in China.”
── Colin Martinez
“First Part is our the most satisfactory CNC machine shop. They are high efficiency and high quality control. Since 2016, we have cooperated with them on many projects, they also provided professional CNC machining suggestions to help us complete the projects. That’s why they’re such a great CNC machine shop.”

── Jackon Brown

a guest of Firstmold from America
a guest of Firstmold from Australia
a guest of Firstmold from France


Insert Molding Manufacturing & Processing

Our insert molding can be used with pre-fabricated materials made from metals, plastic or ceramic. Our insert molding services are ideal for instilling functionality into your part. We can make parts that have improved slip-resistance, enhanced grip and more. Our insert molding makes part with improved IP ratings and ensure longevity of your products. Our molding equipment has zero downtimes, running 24/7 to truncate delivery times and meet customer timeline expectations. We achieve mold tolerances up to +0.010 inches for parts that require the highest precision and dimensional accuracy, and offer a “Lifetime mold guarantee System” that stores and maintain our clients mold indefinitely for a small token of storage fee. This way, you can be rest assured that your molds will remain in the best shape over the cycle of production it was intended.


Choose from simple commodity plastics to high-performance engineering-grade resins to deliver all the required properties in your plastic injection molding parts. We also stock frequently requested and popular resins in-house to bolster our supply chain for quick-fire projects. Below are some of the categories of materials we work with:

Stock materials – PP, PVC, PS, PE, HIPS, PET | ABS, PC, POM, Nylon/PA66, PBT

Stock materials are the most popular on-the-market material solutions that fit into the everyday needs of conventional molding. These materials are more readily available and affordable for use.

Custom materials

Explore custom materials made for special production or product-use cases. Our custom materials are well engineered to deliver enhanced performance.

Learn more about our molding materials

different kinds of materials

Finishing Capabilities

Save time, money and logistic efforts by completing your parts’ final touches with Firstmold. We provide a range of secondary processing options post-molding to decorate, brand and customize your part. Our finishing operations currently include:

· Standard finish

· UV coating

· Polishing

· Silk or Pad printing

· Chrome plating

· Laser etching

· Labelling

· Engraving

· Threaded Inserts

· Media blasting

· Assembly

· Painting/Spray painting

· Learn more about our other finishing capabilities


Firstmold serves a broad range of clients across a range of industries. Our manufacturing solutions are widely employed in the medical, consumer products, automotive, aerospace, Robotics & Automation and defense industries. We have over 20 years of experience in prototype development, product development and mass production during which we have evolved along with the industry-best practices, equipment and capabilities. Our pool of seasoned engineers are adept at optimizing design and executing production with high precision. We provide a superior advantage garnered through our understanding of the different context and nuances for product development across every industry.

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Aerospace and Defense
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Make custom precision parts with reduced weight and exquisite design from plastic and metal components.

Optimize efficiency, reduce weight and mitigate flight risks with our custom manufacturing materials for the aerospace industry.

Surgical-grade parts, wearables and bio-compatible components that meet FDA requirements to deliver life-saving solutions.

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Consumer Products
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Robotics & Automation
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Achieve tight tolerances and complex geometries in consumer electronic products to cater to the various style and class of your end-users.

Create exquisite design that is affordable and scalable to cater to the ever-changing consumer product trends.

Eliminate downtimes and boost efficiency with on-demand components that keep production running while integrating with existing lines and complimentary technology.

Additional Resources & FAQs

1. What is Insert molding?

Insert molding is a type of injection molding that involves the molding of a secondary part over a substrate. The process involves the molding of a plastic part which acts like a secondary layer, around a pre-existing substrate (usually metal)

2. Why should I use Insert molding?

There are many benefits of using Insert molding. Some of the most common advantages include zero assembly cost, multicolor options, improved performance, ergonomics and functionality, strength and shorter leadtimes.

3. When should I choose Insert molding?

Choose Insert molding if your part is going to have thermoplastics and/or rubber molded over a pre-fabricated metal part. Insert molding is also suitable for parts where the substrate is made from metals or wires. Finally, choose Insert molding when your finished piece would not need to be disassembled.