CN106891010A - Hollow product and its metal injection moulding of use - Google Patents
Hollow product and its metal injection moulding of use Download PDFInfo
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture 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
- B22F3/225—Manufacture 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture 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
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710231049.1A CN106891010A (en) | 2017-04-11 | 2017-04-11 | Hollow product and its metal injection moulding of use |
Applications Claiming Priority (1)
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CN201710231049.1A CN106891010A (en) | 2017-04-11 | 2017-04-11 | Hollow product and its metal injection moulding of use |
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CN106891010A true CN106891010A (en) | 2017-06-27 |
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CN201710231049.1A Pending CN106891010A (en) | 2017-04-11 | 2017-04-11 | Hollow product and its metal injection moulding of use |
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Cited By (1)
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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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 |
-
2017
- 2017-04-11 CN CN201710231049.1A patent/CN106891010A/en active Pending
Patent Citations (6)
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)
Publication number | Priority date | Publication date | Assignee | Title |
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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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PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170627 |
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RJ01 | Rejection of invention patent application after publication |