Injection molding production method of conic transparent parts

A technology of injection molding and manufacturing methods, which is applied in the field of injection molding and manufacturing of plastic products, can solve the problems of low yield and achieve the effects of improving production efficiency, prolonging the holding time, and prolonging the cooling time

Active Publication Date: 2005-11-30
NANJING HUAGE ELECTRONICS & AUTOMOBILE PLASTIC IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

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

[0018]

Measurement site

Product design size

Dimensions (mm)

Tolerance(mm)

A

φ18

±1

B

φ24

±1

C

φ83

±1

D

φ18

±1

E

34

±1

F

57

±1

G

86

±1

[0019] The above antenna can be injection molded using the following process parameters.

[0020] 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.

[0021] b. Control the injection speed to be 20%-30% of the conventional speed; the specific speed can be 3-5mm / s;

[0022] c. Keep the pressure for 90-100 seconds under the pressure of 20-25 Pa / cm2 after injection;

[0023] d. After holding the pressure, cool ...

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PUM

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Abstract

The invention discloses injection molding method for transparent material and conical parts and comprises following steps: a. set main injection nozzle with large diameter of 300úÑí½400úÑ compared with general value; b. control the injection speed as 20úÑí½30úÑ of general speed; c. when ending injection, keep pressure as 20~25P / square cm for 90í½100s; d. cool for 50~55s, demould and cooling form in clamp. It can decrease the form of bubble in injection molding parts greatly and increase rate of finished products.

Description

technical field [0001] The invention relates to an injection molding manufacturing method of plastic products, in particular to an injection molding manufacturing method of solid transparent plastic products, in particular to an injection molding manufacturing method of conical transparent parts. 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 only 30% ...

Claims

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Application Information

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IPC IPC(8): B29C45/27
Inventor 周国辉陈浩陆跃忠
Owner NANJING HUAGE ELECTRONICS & AUTOMOBILE PLASTIC IND
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