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A temperature control system for high temperature gas circulation in injection mold cavity

A temperature control system and high-temperature gas technology, applied in the field of plastic injection molding, can solve the problems of limited heating effect on the surface of the mold, no consideration of gas recycling, surface defects of products, etc. The effect of recycling

Active Publication Date: 2021-01-15
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the high-temperature supply unit in the current plastic product injection molding system, which enters the mold cavity and is discharged from the injection channel, does not consider gas recycling, has low heating efficiency, and has potential safety hazards. After the gas is heated by the heater, it enters the closed mold cavity. Only the high-temperature back pressure fills the mold cavity, and the heating effect on the mold surface is extremely limited, which will cause the product to easily produce pits and other surface defects caused by back-pressure gas. A temperature control system for high temperature gas circulation in the cavity of an injection mold is proposed

Method used

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  • A temperature control system for high temperature gas circulation in injection mold cavity
  • A temperature control system for high temperature gas circulation in injection mold cavity
  • A temperature control system for high temperature gas circulation in injection mold cavity

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Embodiment 1

[0043] The preferred embodiment of the present invention provides a temperature control system for high-temperature gas circulation in the cavity of an injection mold. This control device is used in the injection molding system of plastic products and is used in conjunction with the pressure control system of the injection molding system to complete the temperature and pressure control of the system. control, such as figure 2 As shown, a temperature control system for high-temperature gas circulation in an injection mold cavity includes:

[0044] External air connection system 1 : including air supply interface 11 , exhaust interface 12 , mold cavity air inlet interface 13 and mold cavity exhaust interface 14 .

[0045] Valve pipeline system 3: including a first air intake valve V311 connected to the air supply interface 11 at one end, a second air intake valve V312 connected to the air intake interface 13 of the mold cavity at one end, and the other end of the first air inta...

Embodiment 2

[0061] Preferred embodiment of the present invention On the basis of Embodiment 1, the system working steps are as follows:

[0062] Step 1. The communication interface 44 of the controller 41 is connected to the control system of the injection molding machine through a data line for communication; the air supply interface 11 is connected to an external air supply source; the exhaust interface 12 is connected to a vacuum pump; the air inlet interface of the mold cavity 13 is connected with the air inlet port of the mold cavity; the exhaust interface 14 of the mold cavity is connected with the exhaust port of the mold cavity.

[0063] Step 2. According to the mold cavity volume and product control requirements, process parameters such as mold cavity pressure, mold cavity temperature, injection molding machine screw diameter, heater temperature, mold cavity gas circulation time, and D3 vacuum degree are set to the controller 41 ( It can also be set through the man-machine interf...

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Abstract

The invention discloses a high-temperature gas cycling temperature control system of an injection mold cavity. The high-temperature gas cycling temperature control system comprises an external gas connecting system, a valve pipeline system, a heat exchange system and a program control system, wherein the external gas connecting system is used for controlling gas in the mold cavity to enter and exit. The cyclic flow of high-temperature gas in the mold cavity is realized by virtue of a branch pipeline arranged between an air inlet valve and a heater and a gas booster and a valve on the branch pipeline, the surface of a mold is quickly heated, the cyclic utilization of the high-temperature gas is realized, the surface heating efficiency of the mold is improved, the cooling speed of plastic melt is reduced, the surface replication capability of materials is provided, the thickness of a foamed epidermal layer can be adjusted and controlled, the product surface defect caused by back pressureof single gas is improved, and the surface quality of a foamed product is increased.

Description

technical field [0001] The invention belongs to the field of plastic injection molding, and in particular relates to a temperature control system for high-temperature gas circulation in an injection mold cavity. Background technique [0002] Micro-foaming is an important way to reduce the weight of plastic parts, but the surface quality of micro-foaming products is poor, and generally cannot be directly used for appearance parts, which limits the large-scale application of micro-foaming technology. A large number of researches have been carried out at home and abroad for surface quality problems, and the most effective methods are gas back pressure technology and dynamic mold temperature technology. [0003] At present, ZL201010278060.1 combines gas back pressure and dynamic mold temperature system, including two sets of independent gas back pressure supply unit and high temperature gas supply unit. The high temperature gas supply unit mainly heats the mold cavity surface, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/73B29C45/78
Inventor 蒋团辉曾祥补张翔李胜男朱建华何力龚维张纯
Owner GUIZHOU MATERIAL IND TECH INSTITUE