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Cavity gas back pressure and temperature control device

A temperature control device and gas technology, applied in the field of plastic injection molding, to achieve the effect of improving surface quality, better controlling foam size and uniformity, and better surface quality

Active Publication Date: 2012-04-04
CHUNG YUAN CHRISTIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although supercritical micro-foaming injection molding has many advantages, appearance defects such as air marks and fog spots on the product surface are the limitations and bottlenecks that have yet to be broken through

Method used

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  • Cavity gas back pressure and temperature control device
  • Cavity gas back pressure and temperature control device
  • Cavity gas back pressure and temperature control device

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Embodiment Construction

[0039] The preferred embodiments of the present invention are described in detail as follows in conjunction with the drawings.

[0040] Please refer to figure 1 , which is a structural schematic diagram of the present invention.

[0041] The mold cavity gas back pressure and temperature control device of the present invention is mainly composed of a mold 1 , a program control valve 2 , a back pressure gas supply unit 3 and a high temperature gas supply unit 4 .

[0042] The mold 1 is composed of two half-moulds 11, 12 which can be controlled to open and close, and the two half-moulds 11, 12 are combined to form a mold cavity 13, and the mold 1 is provided with a mold cavity 13 A shot channel 14 and an air channel 15.

[0043]And the end of the injection channel 14 relative to the mold cavity can be connected or separated by the injection nozzle 61 of the injection molding machine; The control valve 2 controls the opening and closing of the air channel 15 .

[0044] The two...

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PUM

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Abstract

The invention provides a cavity gas back pressure and temperature control device, mainly comprising a mold, a program control valve, a back pressure gas supply unit and a high temperature gas supply unit, wherein, the mole is provided with injection channels which penetrate to the cavity and at least one air passage, the program control valve is arranged in the air passage of the mold for controlling high temperature gas and / or high pressure gas to get in and out from the cavity through the air passage, the back pressure gas supply unit supplies back pressure gas to the cavity through the program control valve, and the high temperature gas supply unit supplies high temperature gas to the cavity through the program control valve. According to the invention, the surface of the cavity is heated by the high temperature gas supply unit through cooperative control, and back pressure is provided by the back pressure gas supply unit when injection molding, so that a finished product with good surface quality is obtained, and the foaming size and uniformity are controlled.

Description

technical field [0001] The invention relates to the technical field of plastic injection molding, in particular to a control device for cooperatively controlling back pressure gas pressure and mold temperature in supercritical fluid micro-foaming injection molding. Background technique [0002] In the plastic industry, injection molding technology is the most widely used. In order to meet the diversified design of products, the product design must be beautiful, fine and short, thin and functional, and the plastic injection molding technology is also more mature and diversified in response to the trend. Especially automotive exterior components, electronic or home appliance exterior components, etc., due to their large volume and need to be lightweight and usually must have good mechanical strength and dimensional stability, so gas-assisted injection molding and supercritical micro-foaming injection molding are in the technology developed in this context. [0003] Supercriti...

Claims

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Application Information

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IPC IPC(8): B29C45/76B29C45/73
Inventor 陈夏宗许评顺张仁安黄世欣
Owner CHUNG YUAN CHRISTIAN UNIVERSITY
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