Pressure-sustaining gas assistant injection molding system

An injection molding, constant pressure gas technology, applied in the direction of nitrogen purification/separation, can solve the problems of difficult to achieve stable gas injection and pressure maintenance, difficult to control gas pressure, etc., to reduce product development and production costs, stable gas injection and The effect of maintaining pressure and low cost

Inactive Publication Date: 2007-07-04
韩国海 +1
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Problems solved by technology

When the gas enters the interior of the molten plastic, it flows forward along the direction of least resistance (that is, the area with the highest temperature in the molten plastic in the mold). Influenced by unstable flow conditions such as pressure, it is difficult to control the actual gas pressure injected into the molten plastic, and it is even more difficult to realize the functions of stable gas injection and pressure maintenance. Therefore, it is necessary to configure a suitable gas pressure control and adjustment system.

Method used

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  • Pressure-sustaining gas assistant injection molding system
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  • Pressure-sustaining gas assistant injection molding system

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Embodiment Construction

[0031] The following examples are further explanations and illustrations of the present invention, and do not constitute any limitation to the present invention.

[0032] Referring to FIG. 1 , the constant-pressure gas-assisted injection molding system of the present invention consists of four parts: an injection molding device 10 , a nitrogen generator 20 , a gas pressure booster 30 and a gas pressure controller 40 .

[0033] As shown in Figure 2, the nitrogen generator 20 includes an air compressor 201, a drier 202, a first filter 203, an electronic heater 204, a membrane air separator 205, a compressed air buffer tank 206, an oxygen concentration analysis Instrument 207, low-pressure nitrogen storage gas tank 208 and nitrogen generator controller 209, the above-mentioned dryer is a freeze dryer, and the IDU type freeze dryer of Japan SMC is selected for use. The first filter 203 is a sintered metal filter, and the FGD filter of Japan SMC is selected. The electronic heater ...

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Abstract

The invention discloses an auxiliary injection molding system of constant pressure gas, which comprises the following parts: injection molding device (10), nitrogen generator (20), gas pressure booster (30) and gas pressure controller (40), wherein the gas pressure controller (40) connects injection molding device (10) and gas pressure booster (30); the gas pressure booster connects nitrogen generator (20).

Description

technical field [0001] The invention relates to a plastic molding device, in particular to a constant-pressure gas-assisted injection molding system that uses air as a raw material to manufacture nitrogen, automatically controls the pressure of the gas injected into the plastic part after pressurization, and makes plastic into hollow products. Background technique [0002] For many years, people have been exploring the molding and processing technology of hollow plastic products. There are two main methods for the production of hollow plastic products. One is to divide the symmetrical product into two and then inject it into two parts, and then bond or weld the two halves together; the other is blow molding, which includes injection blow molding. Forming and extrusion blow molding. For large products with complex structure and asymmetry, when the above two methods are used for processing and forming, the product needs to be divided into several parts to manufacture tooling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/57B29C45/76B29C45/17C01B21/04
CPCB29C45/1732
Inventor 韩国海何萍
Owner 韩国海
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