{"id":40514,"date":"2025-05-14T17:10:33","date_gmt":"2025-05-14T09:10:33","guid":{"rendered":"https:\/\/zetarmold.com\/?p=40514"},"modified":"2026-04-09T08:11:33","modified_gmt":"2026-04-09T00:11:33","slug":"maquina-de-moldagem-por-injecao-de-parafuso","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/pt\/maquina-de-moldagem-por-injecao-de-parafuso\/","title":{"rendered":"O que faz o parafuso de uma m\u00e1quina de moldagem por inje\u00e7\u00e3o?"},"content":{"rendered":"<figure class=\"wp-block-embed is-type-rich is-provider-spotify wp-block-embed-spotify wp-embed-aspect-21-9 wp-has-aspect-ratio\">\n<div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Spotify Embed: What Does the Screw of an <a href=\"https:>Molde de inje\u00e7\u00e3o<\/a>ing Machine Do?&#8221; style=&#8221;border-radius: 12px&#8221; width=&#8221;100%&#8221; height=&#8221;152&#8243; frameborder=&#8221;0&#8243; allowfullscreen allow=&#8221;autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture&#8221; loading=&#8221;lazy&#8221; src=&#8221;https:\/\/open.spotify.com\/embed\/episode\/3C0DRean0pSITYKcHXQfgZ?si=IgpdB3IWSz-gaWnyX4UDDA&#038;utm_source=oembed&#8221;><\/iframe>\n<\/div>\n<\/figure>\n<p>Introdu\u00e7\u00e3o: <strong>O parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o \u00e9 um componente chave no processo de moldagem por inje\u00e7\u00e3o. \u00c9 respons\u00e1vel pela fus\u00e3o, mistura e compress\u00e3o da mat\u00e9ria-prima pl\u00e1stica.<\/strong> Neste artigo, discutiremos o papel do parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o.<\/p>\n<h2 class=\"wp-block-heading\"><strong>O que s\u00e3o os parafusos de moldagem por inje\u00e7\u00e3o?<\/strong><\/h2>\n<p>The injection molding screw is a very important part of the injection molding machine. It has the functions of conveying, compacting, melting, stirring and pressurizing the plastic. All of this is done by the rotation of the screw in the barrel.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-63 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"369\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67461-1.jpg\" alt=\"\" class=\"wp-image-40539\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67461-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67461-1-300x185.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Quando o parafuso roda, o pl\u00e1stico esfrega e desliza contra o interior do cilindro, a parte inferior da rosca do parafuso, a extremidade de press\u00e3o do parafuso e entre os pl\u00e1sticos. O pl\u00e1stico avan\u00e7a devido a todos estes movimentos e o calor da fric\u00e7\u00e3o tamb\u00e9m \u00e9 absorvido pelo pl\u00e1stico, o que o torna mais quente e derrete o pl\u00e1stico.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Quais s\u00e3o as diferen\u00e7as entre os parafusos da m\u00e1quina de moldagem por inje\u00e7\u00e3o?<\/strong><\/h2>\n<p>O parafuso \u00e9 uma parte muito importante da m\u00e1quina de moldagem por inje\u00e7\u00e3o, sendo respons\u00e1vel pelo transporte, compacta\u00e7\u00e3o, fus\u00e3o, agita\u00e7\u00e3o e pressuriza\u00e7\u00e3o do pl\u00e1stico na produ\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-64 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67462-2.jpg\" alt=\"\" class=\"wp-image-40540\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67462-2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67462-2-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Os parafusos para a m\u00e1quina de moldagem por inje\u00e7\u00e3o podem ser divididos em tr\u00eas tipos: tipo gradual, tipo s\u00fabito e tipo universal. Estes tr\u00eas tipos de parafusos t\u00eam as suas pr\u00f3prias formas e fun\u00e7\u00f5es. O parafuso gradual \u00e9 utilizado principalmente para processar pl\u00e1sticos n\u00e3o cristalinos com uma ampla gama de temperaturas de amolecimento e alta viscosidade.<\/p>\n<p>O parafuso r\u00e1pido \u00e9 utilizado principalmente para processar pl\u00e1sticos que s\u00e3o cristalinos e t\u00eam uma viscosidade e um ponto de fus\u00e3o claros; o parafuso geral \u00e9 utilizado principalmente para processar pl\u00e1sticos que s\u00e3o cristalinos e n\u00e3o-cristalinos.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-65 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"418\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67464-2.jpg\" alt=\"\" class=\"wp-image-40541\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67464-2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67464-2-300x209.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O parafuso \u00e9 a parte mais importante da m\u00e1quina de moldagem por inje\u00e7\u00e3o. Pode ser dividido em diferentes tipos de acordo com diferentes fun\u00e7\u00f5es e requisitos.<\/p>\n<p><strong>Classifica\u00e7\u00e3o por fun\u00e7\u00e3o<\/strong><\/p>\n<p>De acordo com a fun\u00e7\u00e3o, o parafuso de plastifica\u00e7\u00e3o pode ser dividido em quatro zonas, que s\u00e3o a zona de transporte de s\u00f3lidos, a zona de atraso de fus\u00e3o, a zona de solu\u00e7\u00e3o s\u00f3lida e a zona de transporte de fus\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-66 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"358\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67463-2.jpg\" alt=\"\" class=\"wp-image-40542\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67463-2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67463-2-300x179.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Os parafusos nestas quatro \u00e1reas funcionam de forma independente, mas tamb\u00e9m trabalham em conjunto. O parafuso na \u00e1rea de transporte de s\u00f3lidos est\u00e1 ligado \u00e0 tremonha de alimenta\u00e7\u00e3o para fazer avan\u00e7ar o pl\u00e1stico com o aumento da temperatura.<\/p>\n<p>O parafuso na zona de atraso de fus\u00e3o faz com que o sol se acumule na ranhura do parafuso para formar uma piscina de fus\u00e3o. O parafuso na zona de solu\u00e7\u00e3o s\u00f3lida tem duas fun\u00e7\u00f5es. Uma \u00e9 ajudar o material fundido a plastificar e a outra \u00e9 transportar o pl\u00e1stico fundido para a po\u00e7a de fus\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-67 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"420\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67465-1.jpg\" alt=\"\" class=\"wp-image-40543\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67465-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67465-1-300x210.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O parafuso na \u00faltima zona de fus\u00e3o ajudar\u00e1 a manter o pl\u00e1stico \u00e0 mesma temperatura e a manter o pl\u00e1stico a fluir suavemente.<\/p>\n<p><strong>Diferencia\u00e7\u00e3o por forma geom\u00e9trica<\/strong><\/p>\n<p>Com base na forma, pode ser dividida em tr\u00eas partes: zona de alimenta\u00e7\u00e3o, zona de compress\u00e3o e zona de dosagem. A zona de alimenta\u00e7\u00e3o \u00e9 para fixar a profundidade da ranhura da ranhura do parafuso, que \u00e9 usada para empurrar o s\u00f3lido pl\u00e1stico para come\u00e7ar a derreter antes do final da alimenta\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-68 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"398\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67466.jpg\" alt=\"\" class=\"wp-image-40544\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67466.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6ce8\u5851\u87ba\u67466-300x199.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>o parafuso na zona de compress\u00e3o \u00e9 a profundidade da ranhura da ranhura do parafuso c\u00f3nico, que pode ajudar \u00e0 fus\u00e3o, mistura, compress\u00e3o de cisalhamento e exaust\u00e3o pressurizada das mat\u00e9rias-primas pl\u00e1sticas.<\/p>\n<p>A zona de dosagem \u00e9 a profundidade fixa da ranhura do parafuso. Para al\u00e9m de comprimir o pl\u00e1stico, tamb\u00e9m fornece mais press\u00e3o para garantir que o pl\u00e1stico est\u00e1 a uma temperatura uniforme e \u00e9 est\u00e1vel.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-69 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"345\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1-1.jpg\" alt=\"\" class=\"wp-image-40545\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1-1-300x173.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Qual \u00e9 o princ\u00edpio de funcionamento do parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o?<\/strong><\/h2>\n<p><strong>Princ\u00edpio de funcionamento<\/strong><\/p>\n<p>O parafuso de extrus\u00e3o derrete o material \u00e0 medida que o empurra continuamente e cria uma press\u00e3o bastante elevada na cabe\u00e7a da matriz, fazendo com que os produtos extrudidos saiam continuamente atrav\u00e9s da cabe\u00e7a da matriz de moldagem.<\/p>\n<p>Ao conceber um parafuso de extrus\u00e3o, \u00e9 necess\u00e1rio pensar em tr\u00eas coisas: a quantidade de pl\u00e1stico que consegue fazer passar, a consist\u00eancia desse fluxo e a qualidade da fus\u00e3o do pl\u00e1stico.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-70 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"275\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/2-2.jpg\" alt=\"\" class=\"wp-image-40546\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/2-2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/2-2-300x138.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O parafuso de inje\u00e7\u00e3o tem duas fun\u00e7\u00f5es: pr\u00e9-plastificar materiais s\u00f3lidos e injetar materiais fundidos para o processo de inje\u00e7\u00e3o. N\u00e3o precisa de extrudir de forma constante.<\/p>\n<p>The pre-plasticization of the injection screw is just a front process of the injection molding process, which is not a big deal compared to the extrusion screw.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-71 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"303\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105310.jpg\" alt=\"\" class=\"wp-image-40547\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105310.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105310-300x152.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Aquecimento de materiais<\/strong><\/p>\n<p>Para al\u00e9m do calor gerado pelo efeito de cisalhamento, semelhante ao do parafuso de extrus\u00e3o durante a plastifica\u00e7\u00e3o, o material pr\u00e9-plastificado no cilindro da m\u00e1quina de inje\u00e7\u00e3o \u00e9 aquecido por mais aquecedores externos porque permanece no cilindro durante mais tempo.<\/p>\n<p>Al\u00e9m disso, quando o material \u00e9 injetado no molde, flui atrav\u00e9s do bocal a uma velocidade elevada e sofre um grande cisalhamento, o que gera calor devido ao cisalhamento.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-72 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"338\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-1.jpeg\" alt=\"\" class=\"wp-image-40474\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-1-300x169.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Em termos de regula\u00e7\u00e3o da press\u00e3o de plastifica\u00e7\u00e3o<\/strong><\/p>\n<p>Quando se est\u00e1 a fabricar material, \u00e9 dif\u00edcil para o parafuso de extrus\u00e3o alterar o grau de esmagamento do pl\u00e1stico, mas o parafuso de inje\u00e7\u00e3o pode alterar o grau de esmagamento do pl\u00e1stico alterando a contrapress\u00e3o, pelo que \u00e9 f\u00e1cil controlar o grau de esmagamento do pl\u00e1stico.<\/p>\n<p><strong>Em termos de altera\u00e7\u00e3o do comprimento do parafuso<\/strong><\/p>\n<p>Durante a pr\u00e9-plastifica\u00e7\u00e3o, o parafuso de inje\u00e7\u00e3o roda e retrai-se, fazendo com que o comprimento de trabalho efetivo mude. O parafuso de extrus\u00e3o tem de estar a uma temperatura constante, press\u00e3o constante, quantidade constante e a extrudir continuamente.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-73 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"462\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105707.jpg\" alt=\"\" class=\"wp-image-40548\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105707.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105707-300x231.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Tem de ser posicionado e rodado durante a extrus\u00e3o, e o comprimento efetivo de trabalho do parafuso n\u00e3o pode mudar.<\/p>\n<p><strong>Em termos do impacto da capacidade de plastifica\u00e7\u00e3o na capacidade de produ\u00e7\u00e3o<\/strong><\/p>\n<p>A capacidade de plastifica\u00e7\u00e3o do parafuso de extrus\u00e3o afecta diretamente a capacidade de produ\u00e7\u00e3o, enquanto o tempo de pr\u00e9-plastifica\u00e7\u00e3o do parafuso de inje\u00e7\u00e3o \u00e9 mais curto do que o tempo de arrefecimento do produto na cavidade do molde.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-74 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"378\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111909.jpg\" alt=\"\" class=\"wp-image-40569\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111909.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111909-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Por conseguinte, a capacidade de plastifica\u00e7\u00e3o do parafuso de inje\u00e7\u00e3o n\u00e3o \u00e9 o principal fator que afecta a capacidade de produ\u00e7\u00e3o.<\/p>\n<p><strong>Em termos de estrutura da cabe\u00e7a do parafuso<\/strong><\/p>\n<p>A cabe\u00e7a do parafuso de inje\u00e7\u00e3o \u00e9 diferente da cabe\u00e7a do parafuso de extrus\u00e3o. A cabe\u00e7a do parafuso de extrus\u00e3o \u00e9 maioritariamente redonda ou romba, e a cabe\u00e7a do parafuso de inje\u00e7\u00e3o \u00e9 maioritariamente pontiaguda, e a cabe\u00e7a tem uma estrutura especial.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-75 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"343\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105359.jpg\" alt=\"\" class=\"wp-image-40549\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105359.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105359-300x172.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Uma cabe\u00e7a de parafuso pontiaguda ou uma cabe\u00e7a de parafuso com uma rosca. Este tipo de cabe\u00e7a de parafuso \u00e9 utilizado principalmente para processar materiais com elevada viscosidade e fraca estabilidade t\u00e9rmica, podendo evitar o fen\u00f3meno de decomposi\u00e7\u00e3o de material estagnado causado pela descarga suja durante a inje\u00e7\u00e3o.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Qual \u00e9 a fun\u00e7\u00e3o do parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o?<\/strong><\/h2>\n<h3 class=\"wp-block-heading\"><strong>Fun\u00e7\u00e3o da sec\u00e7\u00e3o de transporte por parafuso<\/strong><\/h3>\n<p>A unidade de inje\u00e7\u00e3o desempenha um papel fundamental na m\u00e1quina de moldagem por inje\u00e7\u00e3o, sendo respons\u00e1vel por empurrar o pl\u00e1stico fundido para a cavidade do molde para formar o produto acabado desejado.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-76 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"423\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105412.jpg\" alt=\"\" class=\"wp-image-40550\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105412.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105412-300x212.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O material deve atingir a temperatura do ponto de fus\u00e3o depois de passar pela sec\u00e7\u00e3o de transporte. Normalmente, a sec\u00e7\u00e3o de transporte do parafuso tem cerca de 50% do comprimento total do parafuso.<\/p>\n<p>Quanto mais profunda for a ranhura do parafuso na sec\u00e7\u00e3o de transporte, mais material pode mover, mas \u00e9 necess\u00e1rio garantir que o parafuso \u00e9 suficientemente forte.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-77 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"395\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105423.jpg\" alt=\"\" class=\"wp-image-40551\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105423.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105423-300x198.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Fun\u00e7\u00e3o da sec\u00e7\u00e3o de compress\u00e3o do parafuso<\/strong><\/h3>\n<p>A sec\u00e7\u00e3o de compress\u00e3o do parafuso \u00e9 respons\u00e1vel pela compress\u00e3o, pressuriza\u00e7\u00e3o e exaust\u00e3o do pl\u00e1stico. Depois de passar por esta sec\u00e7\u00e3o, o material est\u00e1 quase completamente derretido, mas n\u00e3o est\u00e1 uniformemente misturado. Normalmente, a sec\u00e7\u00e3o de compress\u00e3o representa 20-25% do comprimento total do parafuso.<\/p>\n<p>Nesta parte, o pl\u00e1stico derrete lentamente e o volume da ranhura do parafuso deve diminuir lentamente, caso contr\u00e1rio, a press\u00e3o do material n\u00e3o ser\u00e1 s\u00f3lida, a transfer\u00eancia de calor ser\u00e1 lenta, a exaust\u00e3o ser\u00e1 m\u00e1 e tamb\u00e9m far\u00e1 com que a pe\u00e7a de trabalho tenha poros.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-78 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"342\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105432.jpg\" alt=\"\" class=\"wp-image-40552\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105432.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105432-300x171.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>A taxa de compress\u00e3o do parafuso \u00e9 a rela\u00e7\u00e3o entre a profundidade da \u00faltima ranhura do parafuso da sec\u00e7\u00e3o de alimenta\u00e7\u00e3o e a profundidade da primeira ranhura do parafuso da sec\u00e7\u00e3o de medi\u00e7\u00e3o.<\/p>\n<p>Al\u00e9m disso, se o comprimento da sec\u00e7\u00e3o de compress\u00e3o for constante, quanto menor for a taxa de compress\u00e3o, menor ser\u00e1 o calor de cisalhamento. Assim, a estrutura da sec\u00e7\u00e3o de compress\u00e3o \u00e9 o principal fator que determina o tamanho do calor de cisalhamento.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-79 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"333\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105444.jpg\" alt=\"\" class=\"wp-image-40553\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105444.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105444-300x167.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Normalmente, pretende-se utilizar um parafuso com um baixo calor de cisalhamento e uma taxa de compress\u00e3o de 1,8-2,2. Para a profundidade da ranhura do parafuso da sec\u00e7\u00e3o de dosagem, \u00e9 necess\u00e1rio utilizar 0,09-0,1 vezes o di\u00e2metro do parafuso.<\/p>\n<h3 class=\"wp-block-heading\"><strong>A fun\u00e7\u00e3o da sec\u00e7\u00e3o de dosagem de parafusos<\/strong><\/h3>\n<p>A sec\u00e7\u00e3o de dosagem do parafuso representa normalmente cerca de 20-25% do comprimento total do parafuso e \u00e9 principalmente respons\u00e1vel por misturar uniformemente o pl\u00e1stico para garantir que todo o pl\u00e1stico \u00e9 derretido.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-80 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"452\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105722.jpg\" alt=\"\" class=\"wp-image-40554\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105722.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105722-300x226.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Quanto mais longa for a sec\u00e7\u00e3o de dosagem, melhor ser\u00e1 o efeito de mistura do pl\u00e1stico. Se for demasiado longa, a massa fundida permanecer\u00e1 demasiado tempo e produzir\u00e1 decomposi\u00e7\u00e3o t\u00e9rmica; se for demasiado curta, a temperatura n\u00e3o ser\u00e1 uniforme.<\/p>\n<p>Generally, when we select an injection molding machine to process products, it is best that the product weight is 70%-80% of the injection volume.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-81 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"303\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105739.jpg\" alt=\"\" class=\"wp-image-40555\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105739.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807105739-300x152.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se o volume de inje\u00e7\u00e3o for demasiado grande, a massa fundida permanecer\u00e1 na sec\u00e7\u00e3o de dosagem durante muito tempo. Isto far\u00e1 com que o material se decomponha devido ao calor, criar\u00e1 poros no produto final e at\u00e9 afectar\u00e1 as propriedades mec\u00e2nicas do produto.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Efeito Plastificante<\/strong><\/h3>\n<p>A principal fun\u00e7\u00e3o do parafuso no processo de moldagem por inje\u00e7\u00e3o \u00e9 derreter o material pl\u00e1stico s\u00f3lido com calor, transform\u00e1-lo em estado l\u00edquido e empurr\u00e1-lo direta ou indiretamente para a cavidade do molde para fazer um produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-82 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"295\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111901.jpg\" alt=\"\" class=\"wp-image-40568\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111901.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111901-300x148.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Assim, o parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o \u00e9 designado por plastificador. O processo de plastifica\u00e7\u00e3o \u00e9 afetado por muitos factores, tais como o comprimento e o di\u00e2metro do parafuso, o passo, a velocidade, etc. O ajuste razo\u00e1vel destes factores tem um enorme impacto no efeito de plastifica\u00e7\u00e3o.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Efeito de pressuriza\u00e7\u00e3o<\/strong><\/h3>\n<p>O parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o tem a fun\u00e7\u00e3o de empurrar o material pl\u00e1stico derretido para a cavidade do molde. Para isso, o parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o utiliza diferentes passos de parafuso e bicos de alta press\u00e3o, conforme necess\u00e1rio.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-83 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"425\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111845.jpg\" alt=\"\" class=\"wp-image-40567\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111845.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111845-300x213.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O parafuso com um bocal de alta press\u00e3o pode aumentar a press\u00e3o de inje\u00e7\u00e3o do material pl\u00e1stico para garantir a densidade e a qualidade do produto. Assim, o efeito de pressuriza\u00e7\u00e3o \u00e9 tamb\u00e9m uma das fun\u00e7\u00f5es importantes do parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Fun\u00e7\u00e3o de regula\u00e7\u00e3o da temperatura<\/strong><\/h3>\n<p>O parafuso \u00e9 normalmente feito de metal, pelo que pode ser aquecido ou arrefecido para controlar a temperatura do pl\u00e1stico. O controlo da temperatura \u00e9 muito importante no processo de moldagem por inje\u00e7\u00e3o porque afecta diretamente a forma como o pl\u00e1stico flui e a rapidez com que endurece.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-84 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111755.jpg\" alt=\"\" class=\"wp-image-40566\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111755.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111755-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O parafuso \u00e9 normalmente feito de metal, pelo que pode ser aquecido ou arrefecido para controlar a temperatura do pl\u00e1stico. O controlo da temperatura \u00e9 muito importante no processo de moldagem por inje\u00e7\u00e3o porque afecta diretamente a forma como o pl\u00e1stico flui e a rapidez com que endurece.<\/p>\n<p>O parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o tem normalmente um sistema de aquecimento e arrefecimento para manter a temperatura constante durante o processo de moldagem por inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-85 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"297\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111742.jpg\" alt=\"\" class=\"wp-image-40565\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111742.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111742-300x149.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Quando a m\u00e1quina de moldagem por inje\u00e7\u00e3o est\u00e1 a funcionar, as sec\u00e7\u00f5es de alta e baixa temperatura do parafuso alternam para garantir que o material pl\u00e1stico \u00e9 totalmente derretido e que o processo de moldagem por inje\u00e7\u00e3o \u00e9 est\u00e1vel.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Fun\u00e7\u00e3o de limpeza<\/strong><\/h3>\n<p>Uma vez que existem muitos tipos diferentes de materiais pl\u00e1sticos utilizados na moldagem por inje\u00e7\u00e3o e, por vezes, \u00e9 necess\u00e1rio adicionar-lhes material, haver\u00e1 sempre alguma sujidade quando a m\u00e1quina de moldagem por inje\u00e7\u00e3o funciona.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-86 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"247\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111720.jpg\" alt=\"\" class=\"wp-image-40564\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111720.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111720-300x124.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Estas impurezas afectar\u00e3o o produto e at\u00e9 danificar\u00e3o o molde. Neste caso, o parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o desempenhar\u00e1 um papel de limpeza.<\/p>\n<p>A alta temperatura e a alta press\u00e3o geradas pela fric\u00e7\u00e3o rotacional do parafuso podem descarregar impurezas e res\u00edduos, garantindo a qualidade do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-87 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"338\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111709.jpg\" alt=\"\" class=\"wp-image-40563\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111709.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111709-300x169.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Fus\u00e3o e mistura de materiais pl\u00e1sticos<\/strong><\/h3>\n<p>\u00c0 medida que o parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o se move, tamb\u00e9m empurra os gr\u00e2nulos de pl\u00e1stico para a frente, fazendo com que os gr\u00e2nulos de pl\u00e1stico da frente sejam empurrados para tr\u00e1s, misturando completamente os gr\u00e2nulos de pl\u00e1stico derretido com os gr\u00e2nulos de pl\u00e1stico n\u00e3o derretido.<\/p>\n<p>Com os gr\u00e2nulos de pl\u00e1stico misturados, o parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o empurra os gr\u00e2nulos de pl\u00e1stico para a zona de aquecimento e, em seguida, empurra-os para a zona de fus\u00e3o ap\u00f3s o aquecimento.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-88 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"311\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/17-2.jpeg\" alt=\"\" class=\"wp-image-40558\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/17-2.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/17-2-300x156.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Na zona de fus\u00e3o do pl\u00e1stico, o parafuso desempenha a sua fun\u00e7\u00e3o principal, aquecendo e fundindo o pl\u00e1stico, rodando-o e empurrando-o para a frente.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Preenchimento da cavidade do molde<\/strong><\/h3>\n<p>O parafuso n\u00e3o s\u00f3 empurra o material pl\u00e1stico, como tamb\u00e9m aplica uma press\u00e3o elevada para garantir que a cavidade do molde \u00e9 preenchida. Esta press\u00e3o ajuda a ultrapassar a espessura do pl\u00e1stico e a garantir que este preenche todas as partes do molde.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-89 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"300\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/7-2.jpeg\" alt=\"\" class=\"wp-image-40556\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/7-2.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/7-2-300x150.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Quando o material pl\u00e1stico estiver derretido e misturado, o parafuso empurra-o para a cavidade de enchimento do molde. A a\u00e7\u00e3o de empurrar do parafuso garante que o material pl\u00e1stico preenche todos os detalhes da cavidade do molde para dar a forma do produto que pretende.<\/p>\n<p>O pl\u00e1stico derretido do parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o \u00e9 enviado para a cavidade do molde para fazer o produto acabado que pretende. \u00c9 poss\u00edvel controlar a velocidade a que o parafuso roda, de modo a enviar a quantidade certa de pl\u00e1stico para a cavidade do molde. Isto garante que o produto moldado \u00e9 bom e ajuda-o a fazer as coisas mais rapidamente.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-90 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"332\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5851\u6599\u6ce8\u5c04\u6210\u578b-1.jpg\" alt=\"\" class=\"wp-image-40557\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5851\u6599\u6ce8\u5c04\u6210\u578b-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5851\u6599\u6ce8\u5c04\u6210\u578b-1-300x166.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Quais s\u00e3o os m\u00e9todos para selecionar o parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o?<\/strong><\/h2>\n<p>&nbsp;<strong>Passo e tipo de rosca<\/strong><\/p>\n<p>O passo \u00e9 a dist\u00e2ncia a que o pl\u00e1stico avan\u00e7a por cada rota\u00e7\u00e3o do parafuso. Quanto maior for o passo, mais curta \u00e9 a dist\u00e2ncia que o pl\u00e1stico avan\u00e7a por rota\u00e7\u00e3o, o que \u00e9 adequado para pl\u00e1sticos dif\u00edceis de fundir. Os tipos de rosca do parafuso s\u00e3o rosca de ranhura profunda e rosca de ranhura rasa.<\/p>\n<p><strong>Mat\u00e9ria<\/strong>l<strong>&nbsp;Sele\u00e7\u00e3o<\/strong><\/p>\n<p>Os parafusos s\u00e3o fabricados com alguns materiais diferentes. Os mais comuns s\u00e3o o a\u00e7o normal, as ligas de a\u00e7o de alta qualidade e os materiais especiais resistentes ao desgaste. Os parafusos de a\u00e7o normal s\u00e3o bons para a maioria dos pl\u00e1sticos. Mas se estiver a utilizar pl\u00e1sticos de engenharia que precisam de ser muito resistentes, deve utilizar parafusos feitos de ligas de a\u00e7o de alta qualidade ou de materiais especiais resistentes ao desgaste.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-91 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"419\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1234567890-.jpg\" alt=\"\" class=\"wp-image-40573\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1234567890-.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1234567890--300x210.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Di\u00e2metro e comprimento<\/strong><\/p>\n<p>Escolher o di\u00e2metro e o comprimento do parafuso de acordo com as especifica\u00e7\u00f5es e os requisitos de produ\u00e7\u00e3o da <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"link\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">moldagem por inje\u00e7\u00e3o<\/a> m\u00e1quina. Quanto maior for o di\u00e2metro do parafuso, maior ser\u00e1 a capacidade de moldagem por inje\u00e7\u00e3o e mais adequado para moldagem por inje\u00e7\u00e3o de grandes dimens\u00f5es; quanto menor for o di\u00e2metro do parafuso, mais adequado ser\u00e1 para moldagem por inje\u00e7\u00e3o de pequenas dimens\u00f5es. <\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-92 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"429\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111804.jpg\" alt=\"\" class=\"wp-image-40562\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111804.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111804-300x215.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Em termos de comprimento, em geral, o comprimento do parafuso deve ser 3-4 vezes o di\u00e2metro para garantir que o pl\u00e1stico \u00e9 totalmente plastificado.<\/p>\n<p><strong>Taxa de compress\u00e3o<\/strong><\/p>\n<p>A taxa de compress\u00e3o do parafuso refere-se \u00e0 rela\u00e7\u00e3o entre a profundidade e a superficialidade da \u00e1rea da rosca do parafuso, tamb\u00e9m conhecida como a capacidade de plastifica\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-93 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"312\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111731.jpg\" alt=\"\" class=\"wp-image-40561\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111731.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111731-300x156.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Diferentes pl\u00e1sticos requerem diferentes taxas de compress\u00e3o para garantir que o pl\u00e1stico \u00e9 totalmente plastificado sem plastificar em excesso e causar decomposi\u00e7\u00e3o t\u00e9rmica.<\/p>\n<h2 class=\"wp-block-heading\">Como utilizar corretamente o parafuso da m\u00e1quina de moldagem por inje\u00e7\u00e3o?<\/h2>\n<p><strong>Pr\u00e9-aquecimento do arranque<\/strong><\/p>\n<p>Antes de iniciar a m\u00e1quina de moldagem por inje\u00e7\u00e3o, \u00e9 necess\u00e1rio pr\u00e9-aquecer o parafuso. O objetivo do pr\u00e9-aquecimento \u00e9 aquecer o parafuso at\u00e9 \u00e0 temperatura de trabalho correta e reduzir o arrefecimento do pl\u00e1stico no parafuso, para que o pl\u00e1stico possa ser totalmente plastificado e evitar problemas causados pela fus\u00e3o incompleta do pl\u00e1stico.<\/p>\n<p><strong>Controlo da temperatura<\/strong><\/p>\n<p>A chave \u00e9 manter a temperatura do parafuso e do cilindro da m\u00e1quina de moldagem por inje\u00e7\u00e3o de pl\u00e1stico. Se a temperatura for demasiado elevada, o pl\u00e1stico decomp\u00f5e-se. Se a temperatura for demasiado baixa, o pl\u00e1stico n\u00e3o ser\u00e1 plastificado. Por conseguinte, a temperatura do parafuso e do cilindro deve ser ajustada de acordo com os diferentes pl\u00e1sticos para garantir que funcionam dentro do intervalo de temperatura adequado.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-94 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"318\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111921.jpg\" alt=\"\" class=\"wp-image-40570\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111921.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807111921-300x159.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Limpeza e manuten\u00e7\u00e3o<\/strong><\/p>\n<p>Mantenha o parafuso limpo e arrumado para evitar que os res\u00edduos de pl\u00e1stico e o p\u00f3 de metal afectem a qualidade da moldagem por inje\u00e7\u00e3o. Utilize agentes de limpeza e ferramentas especiais para a limpeza e evite utilizar objectos duros para riscar a superf\u00edcie do parafuso para evitar danos.<\/p>\n<p><strong>Evitar a utiliza\u00e7\u00e3o excessiva<\/strong><\/p>\n<p>Don&#8217;t run the plastic injection molding machines at full throttle for long periods of time. It&#8217;ll wear out the screw and shorten its life.Make a reasonable production plan, take proper rest and maintenance, and extend the service life of the screw.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-95 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"340\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1111111111111.jpg\" alt=\"\" class=\"wp-image-40571\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1111111111111.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/1111111111111-300x170.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n<p>Em suma, o parafuso na m\u00e1quina de moldagem por inje\u00e7\u00e3o tem muitas tarefas a realizar e cada uma delas tem um grande efeito na qualidade do produto final e na rapidez com que \u00e9 fabricado. Assim, quando se est\u00e1 a fazer <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"link\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">moldagem por inje\u00e7\u00e3o<\/a>Para isso, \u00e9 necess\u00e1rio saber utilizar corretamente o parafuso.<\/p>\n<div style=\"background:#f0f4f8;padding:20px;border-radius:8px;margin-top:30px;\">\n<p style=\"margin:0 0 10px;font-size:18px;\"><strong>Need a Quote for Your Injection Molding Project?<\/strong><\/p>\n<p style=\"margin:0 0 10px;\">Get competitive pricing, DFM feedback, and production timeline from ZetarMold&#8217;s engineering team.<\/p>\n<p style=\"margin:0;\"><a href=\"https:\/\/zetarmold.com\/pt\/contactar-nos\/\" style=\"background:#2563eb;color:white;padding:12px 24px;border-radius:6px;text-decoration:none;font-weight:bold;\">Request a Free Quote \u2192<\/a> See our <a href=\"https:\/\/zetarmold.com\/pt\/injection-molding-complete-guide\/\">Injection Molding Complete Guide<\/a> for a comprehensive overview.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":40550,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"What Does the Screw of an Injection Molding Machine | ZetarMold","_seopress_titles_desc":"Discover expert insights on screw injection molding machine from ZetarMold. We provide professional injection molding services with DFM support, fast","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[42],"tags":[135,187],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/40514"}],"collection":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/comments?post=40514"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/40514\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media\/40550"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media?parent=40514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/categories?post=40514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/tags?post=40514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}