{"id":11648,"date":"2023-05-11T09:35:31","date_gmt":"2023-05-11T01:35:31","guid":{"rendered":"https:\/\/firstmold.com\/?p=11648"},"modified":"2025-07-15T13:33:32","modified_gmt":"2025-07-15T05:33:32","slug":"feeding-system","status":"publish","type":"post","link":"https:\/\/firstmold.com\/pt\/guides\/feeding-system\/","title":{"rendered":"Sistema de alimenta\u00e7\u00e3o no molde de inje\u00e7\u00e3o"},"content":{"rendered":"


Para al\u00e9m do porta-moldes<\/strong><\/a> mencionado anteriormente, outro fator crucial componente de molde de inje\u00e7\u00e3o<\/strong><\/a> \u00e9 o sistema de alimenta\u00e7\u00e3o.<\/p>\n\n\n\n

O sistema de alimenta\u00e7\u00e3o (sistema de alimenta\u00e7\u00e3o), tamb\u00e9m conhecido como sistema de canais, direcciona o pl\u00e1stico fundido do bico da m\u00e1quina de inje\u00e7\u00e3o para o cavidade do molde<\/strong><\/a>. O seu papel \u00e9 assegurar um enchimento suave e ordenado da cavidade e transmitir a press\u00e3o de inje\u00e7\u00e3o para obter pe\u00e7as de pl\u00e1stico bem estruturadas durante o enchimento e a solidifica\u00e7\u00e3o.<\/p>\n\n\n\n

\"Sistema
Sistema de alimenta\u00e7\u00e3o na moldagem por inje\u00e7\u00e3o<\/figcaption><\/figure>\n\n\n\n

Geralmente, os moldes com sistemas de alimenta\u00e7\u00e3o convencionais s\u00e3o tamb\u00e9m designados por moldes de canal frio, embora raramente o sejam explicitamente.<\/p>\n\n\n\n

Componentes e fun\u00e7\u00f5es do sistema de alimenta\u00e7\u00e3o<\/h2>\n\n\n\n

A conce\u00e7\u00e3o do sistema de canais tem um impacto significativo no aspeto, nas propriedades f\u00edsicas, na precis\u00e3o dimensional e no ciclo de moldagem do produto final. O sistema de alimenta\u00e7\u00e3o consiste principalmente nas seguintes estruturas:<\/p>\n\n\n\n

\"Sistema
Sistema de alimenta\u00e7\u00e3o<\/figcaption><\/figure>\n\n\n\n

Tubo<\/a>: <\/strong>\u00c9 o canal inicial para onde o pl\u00e1stico fundido \u00e9 direcionado a partir do bico da m\u00e1quina de inje\u00e7\u00e3o. \u00c9 respons\u00e1vel pelo transporte do pl\u00e1stico fundido para os canais.<\/p>\n\n\n\n

Corredor e sub-corredor<\/a>:<\/strong> Canais de transi\u00e7\u00e3o que guiam a massa fundida e a distribuem por v\u00e1rias portas depois de a receberem do jito.<\/p>\n\n\n\n

Port\u00e3o<\/a>:<\/strong> Canais curtos que aceleram o fluxo da massa fundida para a cavidade.<\/p>\n\n\n\n

A bala fria \u00e9 boa:<\/strong> Armazena material frio para evitar que este entre na cavidade e afecte a qualidade da pe\u00e7a moldada.<\/p>\n\n\n\n

Princ\u00edpios de conce\u00e7\u00e3o do sistema de alimenta\u00e7\u00e3o<\/h2>\n\n\n\n

1. Assegurar a qualidade das pe\u00e7as de pl\u00e1stico<\/h3>\n\n\n\n

Evitar, tanto quanto poss\u00edvel, as marcas de soldadura. A presen\u00e7a de marcas de soldadura afecta principalmente o aspeto, tornando a superf\u00edcie do produto pobre. A resist\u00eancia tamb\u00e9m ser\u00e1 fraca onde houver marcas de soldadura.<\/p>\n\n\n\n

Evitar o empacotamento excessivo e a press\u00e3o de empacotamento insuficiente. Uma m\u00e1 conce\u00e7\u00e3o do sistema de inje\u00e7\u00e3o ou condi\u00e7\u00f5es de funcionamento inadequadas podem resultar num tempo de enchimento excessivo ou numa press\u00e3o excessiva sobre o material fundido na cavidade. A sobreembalagem excessiva aumenta a densidade do produto, aumenta a tens\u00e3o interna e conduz ao aparecimento de fulgor.<\/p>\n\n\n\n

Evitar quest\u00f5es como tiro curto<\/strong><\/a>, flash<\/strong><\/a>, reten\u00e7\u00e3o de ar, linhas de soldadura<\/strong><\/a>, tra\u00e7os, jato, tens\u00e3o residual, deforma\u00e7\u00e3o<\/strong><\/a>, turno de base, etc.<\/p>\n\n\n\n

Assegurar boas propriedades de apar\u00eancia do produto, facilitar a remo\u00e7\u00e3o de port\u00f5es durante o acabamento e garantir que as marcas dos port\u00f5es n\u00e3o afectam a apar\u00eancia e a aplica\u00e7\u00e3o das pe\u00e7as de pl\u00e1stico.<\/p>\n\n\n\n

\"Sistema
Sistema de alimenta\u00e7\u00e3o de moldes concebido<\/figcaption><\/figure>\n\n\n\n

2. Efici\u00eancia da produ\u00e7\u00e3o<\/h3>\n\n\n\n

Minimizar a necessidade de p\u00f3s-processamento tanto quanto poss\u00edvel, encurtar o ciclo de moldagem e melhorar a efici\u00eancia da produ\u00e7\u00e3o.<\/p>\n\n\n\n

3. Materiais pl\u00e1sticos<\/h3>\n\n\n\n

Evitar a utiliza\u00e7\u00e3o de canais de fluxo demasiado longos ou demasiado pequenos para pl\u00e1sticos com elevada viscosidade ou r\u00e1cios L\/t curtos.<\/p>\n\n\n\n

4. Remo\u00e7\u00e3o de res\u00edduos de solidifica\u00e7\u00e3o<\/h3>\n\n\n\n

Remo\u00e7\u00e3o conveniente e fi\u00e1vel dos res\u00edduos de solidifica\u00e7\u00e3o do sistema de alimenta\u00e7\u00e3o.<\/p>\n\n\n\n

Considerar posi\u00e7\u00f5es de eje\u00e7\u00e3o adequadas para evitar a deforma\u00e7\u00e3o das pe\u00e7as moldadas quando ejectadas.<\/p>\n\n\n\n

5. Material frio<\/h3>\n\n\n\n

Conceber po\u00e7os de descarga de frio e ranhuras de transbordo adequados para evitar que o material frio entre diretamente na cavidade e afecte a qualidade do enchimento.<\/p>\n\n\n\n

6. Enchimento de res\u00edduos: <\/h3>\n\n\n\n

Minimizar e encurtar a sec\u00e7\u00e3o transversal e o comprimento do sistema de alimenta\u00e7\u00e3o para reduzir a utiliza\u00e7\u00e3o de pl\u00e1stico e o tamanho do molde.<\/p>\n\n\n\n

7. Dissipa\u00e7\u00e3o de calor e queda de press\u00e3o<\/h3>\n\n\n\n

Mantenha o percurso do fluxo curto e assegure uma \u00e1rea de sec\u00e7\u00e3o transversal adequada.<\/p>\n\n\n\n

Evite curvas no percurso do fluxo e mudan\u00e7as s\u00fabitas na dire\u00e7\u00e3o do fluxo (utilize cantos arredondados para mudar de dire\u00e7\u00e3o).<\/p>\n\n\n\n

A rugosidade da superf\u00edcie deve ser baixa durante o processamento do percurso do fluxo.<\/p>\n\n\n\n

A multi-gest\u00e3o pode reduzir a queda de press\u00e3o e a press\u00e3o de inje\u00e7\u00e3o necess\u00e1ria, mas pode levar \u00e0 forma\u00e7\u00e3o de linhas de soldadura.<\/p>\n\n\n\n

8. Conseguir, tanto quanto poss\u00edvel, um enchimento simult\u00e2neo<\/h3>\n\n\n\n

No caso de m\u00faltiplas cavidades num molde, assegurar que o material fundido que entra em cada cavidade possa chegar simultaneamente e que a press\u00e3o \u00e0 entrada de cada cavidade seja igual.<\/p>\n\n\n\n

Em conclus\u00e3o<\/h2>\n\n\n\n

O sistema de alimenta\u00e7\u00e3o \u00e9 um aspeto cr\u00edtico dos moldes de inje\u00e7\u00e3o. Para obter informa\u00e7\u00f5es mais detalhadas sobre o jito, a corredi\u00e7a e as comportas, siga as respectivas hiperliga\u00e7\u00f5es neste artigo. N\u00e3o hesite em contactar-nos em marketing@firstmold.com<\/strong><\/a> para mais discuss\u00f5es t\u00e9cnicas ou se necessitar de servi\u00e7os de fabrico de moldes ou de produ\u00e7\u00e3o de pe\u00e7as, visite a nossa cota\u00e7\u00e3o de moldagem por inje\u00e7\u00e3o<\/strong><\/a> p\u00e1gina.<\/p>","protected":false},"excerpt":{"rendered":"

O sistema de canais \u00e9 um componente crucial nos moldes de inje\u00e7\u00e3o. Este artigo explica o que \u00e9 o sistema de canais e os seus princ\u00edpios de conce\u00e7\u00e3o.<\/p>","protected":false},"author":5,"featured_media":18293,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[47],"tags":[60],"class_list":["post-11648","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","tag-injection-mold-component"],"acf":[],"yoast_head":"\nFeeding System | Runner System In The Mold<\/title>\n<meta name=\"description\" content=\"The gating system is a crucial component within injection molds. 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