Injection molding production method of conic transparent parts

A technology of injection molding and manufacturing method, which is applied in the field of injection molding manufacturing of plastic products, can solve the problems of low yield rate, etc., and achieve the effects of improving production efficiency, prolonging the pressure holding time, and increasing the size of the injection port

Active Publication Date: 2009-07-29
NANJING HUAGE ELECTRONICS & AUTOMOBILE PLASTIC IND +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of injection molding manufacturing method of conical transparent parts to solve the problem of low yield due to the existence of air bubbles

Method used

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  • Injection molding production method of conic transparent parts
  • Injection molding production method of conic transparent parts
  • Injection molding production method of conic transparent parts

Examples

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] A manufacturing process of a conical GPPS transparent microwave antenna, the shape of the transparent part is as follows figure 1 As shown, the size requirements of each part are shown in the table below.

[0019]

[0020] The above antenna can be injection molded using the following process parameters.

[0021] a. A large-diameter main sprue is used on the mold, and the diameter of the main sprue is 300% to 400% of the conventional diameter; the diameter of the main sprue in this example is 16mm.

[0022] b. Control the injection speed to be 20%-30% of the conventional speed; the specific speed can be 3-5mm / s;

[0023] c. After injection, keep the pressure for 90-100 seconds under the pressure of 20-25 Pa;

[0024] d. After holding the pressure, cool for 50-55 seconds and demould. After demoulding, place the figure 2 Cool and set in the ...

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Abstract

The invention discloses a manufacturing method of injection molding of conical GPPS parts, which mainly includes the following steps: a. adopting a large-diameter main sprue on the mold, and the diameter of the main sprue is 300% to 400% of the conventional diameter; b. Control the injection speed to 20% to 30% of the normal speed; c. After the injection is completed, hold the pressure at a pressure of 20 to 25 Pa for 90 to 100 seconds; d. After the end of the holding pressure, cool for 50 to 55 seconds and then demould. Then put it into the fixture for cooling and setting. It can greatly reduce the formation of air bubbles in injection molded parts and improve the yield.

Description

technical field [0001] The invention relates to an injection molding manufacturing method of a plastic product, in particular to an injection molding manufacturing method of a solid transparent plastic product, in particular to an injection molding manufacturing method of a conical GPPS transparent part. Background technique [0002] It is widely used in a communication product such as figure 1 The main body shown is a conical transparent plastic part, and the material used is transparent GPPS material. The surface of the product is required to be smooth and transparent, and there are no bubbles and impurities inside. If the mold is designed and formed according to the traditional injection molding process, due to the characteristics of the material and the inconsistency of the wall thickness and size of each part of the product, it is easy to generate air bubbles, which is not only unsightly, but also seriously affects the normal performance of the function. The yield is on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/27B29C45/77B29C45/72B29C45/17
Inventor 周国辉陈浩陆跃忠
Owner NANJING HUAGE ELECTRONICS & AUTOMOBILE PLASTIC IND
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