CN106891010A - Hollow product and its metal injection moulding of use - Google Patents

Hollow product and its metal injection moulding of use Download PDF

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Publication number
CN106891010A
CN106891010A CN201710231049.1A CN201710231049A CN106891010A CN 106891010 A CN106891010 A CN 106891010A CN 201710231049 A CN201710231049 A CN 201710231049A CN 106891010 A CN106891010 A CN 106891010A
Authority
CN
China
Prior art keywords
green compact
hollow
hollow product
injection moulding
metal injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710231049.1A
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Chinese (zh)
Inventor
严新华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen City Sea Of United States And Precision Manufacturing Co Ltd
Original Assignee
Shenzhen City Sea Of United States And Precision Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen City Sea Of United States And Precision Manufacturing Co Ltd filed Critical Shenzhen City Sea Of United States And Precision Manufacturing Co Ltd
Priority to CN201710231049.1A priority Critical patent/CN106891010A/en
Publication of CN106891010A publication Critical patent/CN106891010A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention provides a kind of method of the metal injection moulding of hollow product, and it is comprised the following steps:Metal dust and binding agent are kneaded into feeding;The feeding is heated to plastifying state and is injected in the die cavity of one first injection molding, shaping obtains the first green compact;The feeding is heated to plastifying state and is injected in the die cavity of one second injection molding, shaping obtains the second green compact;Second green compact and the first green compact interference fit are obtained into hollow green compact;Ungrease treatment is carried out to the hollow green compact to remove the binding agent in the hollow green compact;And by the degreasing after hollow green compact be sintered, obtain hollow product.The present invention also provides the hollow product that a kind of use above method is obtained.Compared with correlation technique, the product obtained using the above method, due in green article stage interference fit, through high temperature sintering after, there is metallurgical binding in the first green compact and the second green compact, make hollow product outward appearance indifference and bond strength is high on faying face.

Description

Hollow product and its metal injection moulding of use
Technical field
It is metal injection molded the present invention relates to one kind(Metal Injection Molding, hereinafter referred MIM)Method, More particularly to a kind of MIM methods that can be molded hollow product.
Background technology
In the prior art, mould molding or CNC millings hollow product all more difficult to process are general using sides such as welding, bondings Method assembles.However, using welding or the mode such as bond, the outward appearance of hollow product easily occurs heterochromatic in junction, also leads The problems such as causing processing efficiency relatively low.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of gold for not influenceing outward appearance and efficiency hollow product higher Category injection moulding method and the hollow product.
A kind of metal injection moulding of hollow product, it is comprised the following steps:Metal dust and binding agent are kneaded Into feeding;The feeding is heated to plastifying state and is injected in the die cavity of one first injection molding, shaping obtains the first green compact;Will The feeding is heated to plastifying state and injects in the die cavity of one second injection molding, and shaping obtains the second green compact;By second life Base obtains hollow green compact with the first green compact interference fit;Ungrease treatment is carried out to the hollow green compact to remove in the hollow green compact Binding agent;And by the degreasing after hollow green compact be sintered, obtain hollow product.
Further, first green compact are identical with the sintering shrinkage of second green compact.
Further, first green compact include main body and the auxiliary section being formed in the main body, and second green compact include this Body and the holding section being formed on the body, the main body are in symmetrical structure with the body, and the auxiliary section can be with the holding section mistake It is full of cooperation, so that the first green compact are combined in the hollow green compact with the second green compact.
Further, the auxiliary section is stepped.
Further, the auxiliary section is groove, projection, frosting or serrated face.
Further, fusing point low 5- of the sintering temperature compared with the metal material that first green compact are used that the hollow green compact are used 15℃。
Further, first green compact and second green compact are in symmetrical structure.
The present invention also provides a kind of metal injection molded hollow product, and it uses the above method to be obtained.
Compared with correlation technique, the hollow product obtained using the above method, due in green article stage interference fit, through height After temperature sintering, there is metallurgical binding in the first green compact and the second green compact, make hollow product outward appearance indifference and combination on faying face Intensity is high.Follow-up welding or bonding process can be omitted using the method, production efficiency is improve.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in embodiments of the invention, below will be to being wanted needed for embodiment description The accompanying drawing for using is briefly described.
Fig. 1 is the generalized section of the first green compact of embodiment of the present invention.
Fig. 2 is the generalized section of the second green compact of embodiment of the present invention.
Fig. 3 be embodiment of the present invention the first green compact and the second green compact interference fit after the section of hollow green compact that obtains Schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is further described.
The invention provides a kind of metal injection moulding of hollow product, it is comprised the following steps:
Metal dust and binding agent are kneaded into feeding;
The feeding is heated to plastifying state and is injected in the die cavity of one first injection molding, shaping obtains the first green compact 10;
The feeding is heated to plastifying state and is injected in the die cavity of one second injection molding, shaping obtains the second green compact 30;
Second green compact 30 and the interference fit of the first green compact 10 are obtained into hollow green compact;
Ungrease treatment is carried out to the hollow green compact to remove the binding agent in the hollow green compact;And by the degreasing after hollow green compact It is sintered, obtains hollow product.
In embodiments of the present invention, the first green compact 10 are including being substantially in the main body 13 of half-round tubular and being formed in main body 13 Two auxiliary sections 11 of both sides, auxiliary section 11 is step-like.Second green compact 30 are much the same with the shape of the first green compact 10, its bag Include body 33 and be formed in two holding sections 31 of the both sides of body 33, the shape of holding section 31 can with the shape complementation of auxiliary section 11 Cooperate.First green compact 10 and the second green compact 30 form circle after being assembled together by auxiliary section 11, the interference fit of opening and closing part 31 Tubulose.First green compact 10 are consistent with the molding parameter of the second green compact 30, so as to be shunk when the degreasing of hollow green compact 50 for obtaining, sintering Rate is consistent, so that hollow product outward appearance and structural strength are consistent.
It is appreciated that the first green compact 10, the second green compact 30 or other structures, as long as can be formed after both interference fits Default hollow green compact 50.Preferably, the body 33 of the green compact 30 of main body 13 and second of the first green compact 10 is symmetrical structure, so that Shrinkage factor is consistent when degreasing sintered, makes hollow product outward appearance and structural strength consistent.Auxiliary section 11, holding section 31 can also use it His snap-in structure, it is such as raised to be used using larger frosting of roughness, or both with recessinterengaging means, or both Serrated face of mutual cooperation etc..
During sintering, the fusing point of the metal material that the sintering temperature of use is used with the first green compact 10, the second green compact 30 is approached, It is such as lower than its fusing point 5-15 DEG C, so that both combine more preferably.
Present invention also offers a kind of MIM hollow products, it uses the above method to be obtained.
Compared with correlation technique, the hollow product obtained using the above method, due in green article stage interference fit, through height Temperature sintering after, there is metallurgical binding on faying face in the first green compact 10 and the second green compact 30, make hollow product outward appearance indifference and Bond strength is high.Follow-up welding or bonding process can be omitted using the method, production efficiency is improve.
Herein, term " including ", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, remove Comprising those listed key elements, but also other key elements being not expressly set out can be included.
Herein, the involved noun of locality such as forward and backward, upper and lower is to be located in figure with parts in accompanying drawing and zero Part position each other is intended merely to the clear and convenient of expression technology scheme come what is defined.It should be appreciated that the noun of locality Use should not limit the claimed scope of the application.
In the case where not conflicting, the feature in embodiment herein-above set forth and embodiment can be combined with each other.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (8)

1. a kind of metal injection moulding of hollow product, it is comprised the following steps:
Metal dust and binding agent are kneaded into feeding;
The feeding is heated to plastifying state and is injected in the die cavity of one first injection molding, shaping obtains the first green compact;
The feeding is heated to plastifying state and is injected in the die cavity of one second injection molding, shaping obtains the second green compact;
Second green compact and the first green compact interference fit are obtained into hollow green compact;
Ungrease treatment is carried out to the hollow green compact to remove the binding agent in the hollow green compact;And by the degreasing after hollow green compact It is sintered, obtains hollow product.
2. the metal injection moulding of hollow product according to claim 1, it is characterised in that first green compact with should The sintering shrinkage of the second green compact is identical.
3. the metal injection moulding of hollow product according to claim 1, it is characterised in that first green compact include Main body and the auxiliary section being formed in the main body, second green compact include body and the holding section being formed on the body, the master Body is in symmetrical structure with the body, and the auxiliary section can be with the holding section interference fit, so that the first green compact and the second green compact Combination is in the hollow green compact.
4. the metal injection moulding of hollow product according to claim 3, it is characterised in that the auxiliary section is ladder Shape.
5. the metal injection moulding of hollow product according to claim 3, it is characterised in that the auxiliary section is recessed Groove, projection, frosting or serrated face.
6. the metal injection moulding of hollow product according to claim 1, it is characterised in that the hollow green compact are used Sintering temperature it is low 5-15 DEG C compared with the fusing point of the metal material that first green compact are used.
7. the metal injection moulding of hollow product according to claim 1, it is characterised in that first green compact with should Second green compact are in symmetrical structure.
8. a kind of metal injection molded hollow product, it uses any one of claim 1-7 method to be such as obtained.
CN201710231049.1A 2017-04-11 2017-04-11 Hollow product and its metal injection moulding of use Pending CN106891010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710231049.1A CN106891010A (en) 2017-04-11 2017-04-11 Hollow product and its metal injection moulding of use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710231049.1A CN106891010A (en) 2017-04-11 2017-04-11 Hollow product and its metal injection moulding of use

Publications (1)

Publication Number Publication Date
CN106891010A true CN106891010A (en) 2017-06-27

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114173961A (en) * 2019-06-07 2022-03-11 赛峰飞机发动机公司 Method for producing a turbomachine component by MIM forming

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101433809A (en) * 2008-12-05 2009-05-20 西北有色金属研究院 Integral step-by-step multiple-stage heat-preserving sintering process of metal porous membrane tube
CN102143813A (en) * 2008-07-08 2011-08-03 贝斯娜株式会社 Micro drill and fabricating method thereof
CN102233428A (en) * 2011-06-23 2011-11-09 宁波韵升股份有限公司 Method for preparing bulk sintered Nd-Fe-B permanent magnet material
US20130239410A1 (en) * 2012-03-16 2013-09-19 Foxconn Technology Co., Ltd. Method for manufacturing heat pipe
CN103317137A (en) * 2012-03-19 2013-09-25 富瑞精密组件(昆山)有限公司 Manufacturing method for heat pipe
CN103372650A (en) * 2012-04-16 2013-10-30 富瑞精密组件(昆山)有限公司 Heat pipe shell manufacturing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102143813A (en) * 2008-07-08 2011-08-03 贝斯娜株式会社 Micro drill and fabricating method thereof
CN101433809A (en) * 2008-12-05 2009-05-20 西北有色金属研究院 Integral step-by-step multiple-stage heat-preserving sintering process of metal porous membrane tube
CN102233428A (en) * 2011-06-23 2011-11-09 宁波韵升股份有限公司 Method for preparing bulk sintered Nd-Fe-B permanent magnet material
US20130239410A1 (en) * 2012-03-16 2013-09-19 Foxconn Technology Co., Ltd. Method for manufacturing heat pipe
CN103317137A (en) * 2012-03-19 2013-09-25 富瑞精密组件(昆山)有限公司 Manufacturing method for heat pipe
CN103372650A (en) * 2012-04-16 2013-10-30 富瑞精密组件(昆山)有限公司 Heat pipe shell manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114173961A (en) * 2019-06-07 2022-03-11 赛峰飞机发动机公司 Method for producing a turbomachine component by MIM forming

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SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170627

RJ01 Rejection of invention patent application after publication