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Metal powder injection molding equipment and method

An injection molding and metal powder technology, which is applied in the field of metal powder injection molding equipment, can solve problems such as high cost, unsolvable, and affecting the surface smoothness of products, and achieve the effects of low cost, strong versatility, and high product stability

Inactive Publication Date: 2021-03-02
DONGGUAN HUAJING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN109202085A discloses that a vent hole is set at the mold corresponding to the cavity in the filling area, and the vent hole at the position of the mold cavity is an active vent hole set in the product cavity, which will affect the smoothness of the product surface, and It is also necessary to make cavity vents for each set of molds, which is costly
That is to say, setting the exhaust port at the connection between the barrel and the barrel cannot solve the problem of exhausting the feed in the pre-injection area before the screw check ring

Method used

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  • Metal powder injection molding equipment and method
  • Metal powder injection molding equipment and method
  • Metal powder injection molding equipment and method

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0026] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0027] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0028] In describing the present invention, it is to be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end ", "length", "outer end" and ...

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Abstract

Provided are metal powder injection molding equipment and method. The metal powder injection molding equipment comprises an injection machine. The injection machine comprises a melt pipe and a screw arranged in the melt pipe and used for pushing materials, wherein the screw is provided with a screw non-return ring, an exhaust port and an exhaust valve are arranged at a pre-injection area, locatedin front of the screw non-return ring, of the melt pipe, and the exhaust port is connected with an air extractor. The exhaust hole is formed in the pre-injection area at the front end of the melt pipe, gas generated by feeding in the mixing pre-injection area can be effectively exhausted through the air extractor, the gas is prevented from influencing the injection molding process, the quality ofa molded blank is improved, the position of the exhaust hole does not influence a product cavity, the flatness of the surface of a product is not influenced, and moreover, a cavity exhaust hole does not need to be formed for each set of mold, so that the universality is high, and the cost is low.

Description

technical field [0001] The invention relates to a metal powder injection molding equipment and method. Background technique [0002] The powder metallurgy injection molding process has developed rapidly due to its many advantages, and its technology has been widely used in military, transportation, machinery, electronics, aviation, aerospace and other fields. [0003] Metal powder injection molding (MIM) technology is a technical method for preparing metal parts that has developed rapidly in recent years. Injection molding process, high production efficiency, good product consistency and high product complexity. It can realize stable production with high volume and high yield. [0004] MIM metal feed is mainly a mixture of metal powder and thermoplastic materials, which are mixed under certain process temperature conditions. Thermoplastic materials are collectively referred to as molding agents, which make metal powder fluid at a certain temperature and facilitate injecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F3/00
CPCB22F3/225B22F3/003B22F3/005
Inventor 周锐高万顺程丛奎邹金龙
Owner DONGGUAN HUAJING POWDER METALLURGY