Simple and reliable water injection device for water-assisted injection molding

An injection molding, water-assisted technology, applied in the valve operation/release device, valve device, valve lift, etc., can solve the problems of deviation of the advancing direction of high-pressure water, difficulty in water injection, and increase in manufacturing cost of water needle processing difficulty, and achieves a solution to the problem. Anti-rust problem, ensure the effect of sealing and reliable action

Inactive Publication Date: 2015-04-22
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing water-assisted injection molding water needle device is generally a water needle, which has a simple structure, but has the following problems: the sealing method of the inner and outer cylindrical surfaces makes the processing accuracy of the valve core and valve body and its installation accuracy very high. The processing difficulty and manufacturing cost of the water needle are increased; the sealing method using a simple O-ring seal cannot meet the sealing requirements for high-pressure water; when the water injection delay time is long and the injection water pressure is low, the The molten plastic at the end of the needle freezes and solidifies, resulting in difficulty in water injection and deviation of the forward direction of the high-pressure water; the opening of the water needle is driven by high-pressure water pressure, and the closing is driven by a compressed spring, which makes it difficult to ensure the timeliness and reliability of the needle valve action , and there is a danger of melt entering the valve body during molding

Method used

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  • Simple and reliable water injection device for water-assisted injection molding
  • Simple and reliable water injection device for water-assisted injection molding
  • Simple and reliable water injection device for water-assisted injection molding

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] Assembly drawing of water injection device figure 1 shown. The water injection device includes a plug (1), a valve body (2), a sealing gasket (3), a variable-diameter high-pressure water pipe joint (4), a flange (5), a valve core (6), an SDA thin cylinder (7), Cylinder joint (8), adjusting nut (9), coupling (10), coupling pin (11), cylinder bracket (12), O-ring (13), rectangular sealing ring (14), needle valve installation Bolts (15), cylinder bracket gaskets (16), cylinder bracket mounting screws (17). With the valve body (2) as the main body, the variable-diameter high-pressure water joint (4), flange (5), valve core (6), etc. are directly installed on the valve body; the cylinder (7) is fixed by the cylinder bracket (12), The valve core is controlled by being connected with the valve core through the cylinder joint (8), coupling (10) and connecting pin (11).

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PUM

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Abstract

The invention discloses a water injection device for water-assisted injection molding, and the water injection device is simple in structure and reliable in action. The water injection device comprises a plug 1, a valve body 2, a seal pad 3, a diameter-variable high-pressure water pipe joint 4, a position-adjustable flange 5, a valve core 6, an SDA thin air cylinder 7, an adjusting nut 8, an air cylinder joint 9, a shaft coupler 10, a shaft coupling pin 11, an air cylinder mounting bracket 12, an O-shaped seal ring 13, a rectangular seal ring 14, a valve body mounting bolt 15, bracket mounting pads 16 and bracket mounting bolts 17. The end surface of the valve core is designed to be conical, so that the phenomena of difficulty for water injection and high-pressure water advancing direction deviation caused by solidification of molten plastics near a water injection hole can be removed and reliable water injection and accurate water injection direction are guaranteed; the conical surfaces of the valve core and the valve body are clung to each other, and various auxiliary seal rings are arranged on the valve core, so that a needle valve is guaranteed to excellently seal up sizing materials and water; an air cylinder is adopted to drive a valve needle to be started / stopped, and the action is reliable; the water injection device is suitable for water-assisted injection molding and similar processes.

Description

technical field [0001] The invention relates to a simple and reliable water injection device for water-assisted injection molding, which can be used for experiments and production of water-assisted injection molding and similar processes. Background technique [0002] In the water-assisted injection molding process equipment, the water injection device is an indispensable core component. The design of the water injection device is very rare at home and abroad, and the technology is not yet mature. With the increasing maturity of water-assisted injection molding technology research, the design of water injection device has become particularly important. The existing water-assisted injection molding water needle device is generally a water needle, which has a simple structure, but has the following problems: the sealing method of the inner and outer cylindrical surfaces makes the processing accuracy of the valve core and valve body and its installation accuracy very high. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/38F16K27/02F16K31/12
Inventor 匡唐清付伟余春丛
Owner EAST CHINA JIAOTONG UNIVERSITY
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