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Injection molding process

A process and injection molding system technology, applied in the direction of coating, etc., can solve the problems of uneven dispersion of hot melt colloids and easy occurrence of air bubbles, and achieve the effects of good internal bonding, reducing the probability of air bubbles, and avoiding uneven pressure

Inactive Publication Date: 2019-05-10
合肥旭弘塑胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in the existing injection molding process, due to the influence of pressure, the hot-melt colloid in the mold will be dispersed unevenly, and bubbles and other phenomena are prone to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of injection molding process, comprises the following steps:

[0022] (1) Fully mix the masterbatch and other raw materials required for injection molding;

[0023] (2) Inhale the homogeneously mixed raw materials in step (1) into the barrel of the dryer for drying;

[0024] (3) Heat the screw barrel in the injection molding system to 170°C, heat the hot runner in the injection molding system to 210°C, heat the fixed mold in the injection mold to 60°C, and heat the movable mold to 40°C;

[0025] (4) Add the dried raw materials into the screw barrel preheated in step (3), heat it to a molten state, and inject the raw materials in the molten state into the heated mold through the injection of the pretreated hot runner;

[0026] (5) After the injection of raw materials is completed, the ultrasonic vibration mode is turned on to make the molten materials in the mold contact and fully fuse;

[0027] (6) Exhaust the excess gas in the mold through the vent hole and cl...

Embodiment 2

[0032] A kind of injection molding process, comprises the following steps:

[0033] (1) Fully mix the masterbatch and other raw materials required for injection molding;

[0034] (2) Inhale the homogeneously mixed raw materials in step (1) into the barrel of the dryer for drying;

[0035] (3) Heat the screw barrel in the injection molding system to 190°C, heat the hot runner in the injection molding system to 240°C, heat the fixed mold in the injection mold to 70°C, and heat the movable mold to 50°C;

[0036] (4) Add the dried raw materials into the screw barrel preheated in step (3), heat it to a molten state, and inject the raw materials in the molten state into the heated mold through the injection of the pretreated hot runner;

[0037] (5) After the injection of raw materials is completed, the ultrasonic vibration mode is turned on to make the molten materials in the mold contact and fully fuse;

[0038] (6) Exhaust the excess gas in the mold through the vent hole and cl...

Embodiment 3

[0043] A kind of injection molding process, comprises the following steps:

[0044] (1) Fully mix the masterbatch and other raw materials required for injection molding;

[0045] (2) Inhale the homogeneously mixed raw materials in step (1) into the barrel of the dryer for drying;

[0046] (3) Heat the screw barrel in the injection molding system to 180°C, heat the hot runner in the injection molding system to 225°C, heat the fixed mold in the injection mold to 65°C, and heat the movable mold to 45°C;

[0047] (4) Add the dried raw materials into the screw barrel preheated in step (3), heat it to a molten state, and inject the raw materials in the molten state into the heated mold through the injection of the pretreated hot runner;

[0048] (5) After the injection of raw materials is completed, the ultrasonic vibration mode is turned on to make the molten materials in the mold contact and fully fuse;

[0049] (6) Exhaust the excess gas in the mold through the vent hole and cl...

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PUM

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Abstract

The invention discloses an injection molding process. The injection molding process comprises the following steps of uniformly mixing, drying, preheating, heating and injecting, exhausting, maintaining pressure, cooling and opening the mold. The device has the beneficial effects that the materials are uniformly mixed through ultrasonic waves, the internal combination is better, the phenomenon thatthe raw materials are not uniformly dispersed and uneven mixing is caused due to uneven pressure is avoided; due to the fact that the exhausting process is further added in the process, the probability of bubbles in the final injection product can be reduced.

Description

technical field [0001] The invention belongs to the field of plastic products, and in particular relates to an injection molding process. Background technique [0002] Plastic products are made of plastic, a polymer compound that is polymerized through addition polymerization or polycondensation, commonly known as plastic or resin, and can be freely changed in composition and shape. It is composed of synthetic resin and fillers, plasticizers, stabilizers, lubricants, colorants and other additives. [0003] Injection molding is a method of producing shapes for industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding molding method and die casting method. Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment for making thermoplastic or thermosetting materials into various shapes of plastic products using plas...

Claims

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Application Information

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IPC IPC(8): B29C45/00B29C45/76B29C45/78B29C45/77
Inventor 刘跃
Owner 合肥旭弘塑胶制品有限公司
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