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

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Problems solved by technology

[0004] Although supercritical micro-foaming injection molding has many advantages, appearance defects such as air

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

Examples

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Example Embodiment

[0039] The preferred embodiments of the present invention will be described in detail below in conjunction with the drawings.

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

[0041] The 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 mold halves 11, 12 that can be controlled to open and close, and the two mold halves 11, 12 are combined to form a mold cavity 13, and the mold 1 is provided with a through hole 13 One injection channel 14 and one air channel 15.

[0043] The end of the injection channel 14 relative to the mold cavity can be closed or separated by the injection nozzle 61 of the injection molding machine; and the air channel 15 extends outward to communicate with the program control valve 2 to allow the program The control v...

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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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