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Manufacturing method of metal injection molding product

A manufacturing method and technology of molded products, which are applied to threaded fasteners, connecting members, nuts, etc., can solve the problems of difficult metal injection molding, cost increase, positioning, etc., so as to reduce the cost of tapping, avoid tapping breakage, The effect of improving tapping efficiency

Inactive Publication Date: 2012-05-23
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for metal injection molded products that need to be tapped or drilled, especially for metal injection molded products with deep tapping and small hole diameter, the hardness of metal injection molded products is generally high, so it is easy to cause the breakage of the tap , which increases the cost of
In addition, since the shape of the metal injection molded product is generally irregular, it is difficult to position the metal injection molded product, which in turn affects the efficiency of tapping the metal injection molded product.

Method used

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  • Manufacturing method of metal injection molding product
  • Manufacturing method of metal injection molding product
  • Manufacturing method of metal injection molding product

Examples

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Embodiment Construction

[0018] The tapping method of the metal injection molded product in the preferred embodiment of the present invention is described by taking the tapping of the metal injection molded product 10 as an example. see figure 1 , the metal injection molded product 10 includes a base body 12, the base body 12 along figure 1 The L line needs to tap a first threaded hole 122. The base 12 is made of metal material, such as stainless steel SUS17-4PH.

[0019] The manufacturing method of the metal injection molded product 10 mainly includes the following steps:

[0020] see figure 2 , provide a stud 22, the stud is a hollow cylinder, its specific shape can be different according to actual needs, such as square cylinder, circular cylinder or rhombus cylinder, the present embodiment is a cylinder, the screw A second threaded hole 222 is provided in the column 22, the shape and size of the second threaded hole 222 are equivalent to the shape and size of the first threaded hole 12 to be t...

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Abstract

The invention provides a method for manufacturing a metal injection molding product, which comprises the following steps: providing a screw stud of which the inside is provided with a threaded hole, the screw stud being provided with a plurality of grooves at the peripheral wall; uniformly mixing metal powder and a binder into a feeding material; manufacturing the feeding material into granules of 2 to 15 micrometers; heating the granules to a plasticization state, and filling the granules into a die cavity of an injection mould to mold a blank of a metal injection molding product base, the blank being provided with a matching hole of which the shape and the size are equivalent to that of the screw stud; arranging the screw stud in the matching hole of the blank so as to form a premolding product; degreasing the premolding product so as to remove the binder in the blank; and sintering the degreased premolding product. When the blank shrinks during the sintering treatment process, the part of the blank near the grooves enters in the grooves, thereby forming a plurality of projections clamped with the grooves on a hole wall of the matching hole.

Description

technical field [0001] The invention relates to a method for manufacturing a metal injection molded product. Background technique [0002] Metal injection molding is a new powder metallurgy molding technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. Compared with traditional technology, metal injection molding technology has the characteristics of high precision, uniform structure, high hardness and low production cost, so it is widely used in electronics, aerospace, automobile and other fields. However, for metal injection molded products that need to be tapped or drilled, especially for metal injection molded products with deep tapping and small hole diameter, the hardness of metal injection molded products is generally high, so it is easy to cause the breakage of the tap , resulting in an increase in cost. In addition, since the shape of the metal injection molded product is generally irregular, it is difficu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/08F16B37/00
Inventor 卜建辉曾令斌
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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