CN101530919A - Metal injection molding product and manufacturing method thereof - Google Patents
Metal injection molding product and manufacturing method thereof Download PDFInfo
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- CN101530919A CN101530919A CN200810300518A CN200810300518A CN101530919A CN 101530919 A CN101530919 A CN 101530919A CN 200810300518 A CN200810300518 A CN 200810300518A CN 200810300518 A CN200810300518 A CN 200810300518A CN 101530919 A CN101530919 A CN 101530919A
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- injection molding
- double
- screw bolt
- molding product
- metal injection
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- Injection Moulding Of Plastics Or The Like (AREA)
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; 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 which is 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. The invention also provides a metal injection molding product manufactured by the manufacturing method.
Description
Technical field
The present invention relates to a kind of metal injection molding product and manufacture method thereof.
Background technology
Metal ejection formation is the metallurgical forming technique of a novel powder that modern plastics injection molding technology introducing field of powder metallurgy is formed.Compare with traditional handicraft, the metal ejection formation technology has characteristics such as precision height, even tissue, hardness height and production cost are low, thereby, be widely used in fields such as electronics, space flight, automobile.Yet for the metal injection molding product of need tapping or punching, particularly dark for tapping, the little metal injection molding product in tapping aperture because the hardness of metal injection molding product is generally higher, thereby easily causes the fracture of screw tap, so cause the increase of cost.In addition, because that the shape of metal injection molding product is generally is irregularly shaped, thereby is difficult to this metal injection molding product location, and then influence efficient that this metal injection molding product is carried out tapping.
Summary of the invention
In view of this, be necessary to provide a kind of metal injection molding product that reduces the tapping cost and improve tapping efficient.
In addition, also be necessary to provide a kind of manufacture method of above-mentioned metal injection molding product.
A kind of metal injection molding product, this metal injection molding product comprise a matrix and a double-screw bolt, offer a mating holes on this matrix, and this double-screw bolt is placed in this mating holes, and this matrix and this double-screw bolt are combined as a whole by the mode of sintering.
A kind of manufacture method of metal injection molding product may further comprise the steps:
One double-screw bolt is provided, offers a screwed hole in this double-screw bolt;
With the even mixing feeding that becomes of metal dust and binding agent;
This feeding made 2 ~ 15 microns particle;
This particle is heated under the plastifying state in the die cavity that injects an injection molding molds a base substrate, this base substrate is formed with a mating holes, the shape and the sizableness of the shape of this mating holes and size and this double-screw bolt;
This double-screw bolt is placed in the mating holes of this base substrate and form preform;
This preform is carried out ungrease treatment and remove binding agent in this base substrate;
This preform after degreasing is carried out sintering processes.
Compared to prior art, the manufacture method of described metal injection molding product, this double-screw bolt had been finished the tapping hole before sintering processes, and before sintering processes, hardness of metal materials is lower, and promptly this double-screw bolt tapping hole under the lower situation of hardness is like this, can avoid screw tap fracture when the tapping hole, thereby reduce the tapping cost of this metal injection molding product.In addition, because this double-screw bolt separate manufacturing with this base substrate, and this double-screw bolt is regular cylinder, thereby this double-screw bolt is easy to locate, thereby is convenient at this this screwed hole of double-screw bolt inside fire attack, thereby improves the tapping efficient of this metal injection molding product.
Description of drawings
Fig. 1 is the schematic diagram of attacking the metal injection molding product of screwed hole;
Fig. 2 is the schematic diagram that metal injection molding product shown in Figure 1 is carried out the double-screw bolt of tapping;
Fig. 3 is the schematic diagram that metal injection molding product shown in Figure 1 is carried out the base substrate of tapping;
Fig. 4 puts into the schematic diagram that base substrate shown in Figure 3 forms preform with double-screw bolt shown in Figure 2;
Fig. 5 is the cutaway view of preform shown in Figure 4.
The specific embodiment
The tapping method of the metal injection molding product of preferred embodiment of the present invention is that example is illustrated metal injection molding product 10 is carried out tapping.See also Fig. 1, this metal injection molding product 10 comprises a matrix 12, and this matrix 12 need have been attacked one first screwed hole 122 along the L line of Fig. 1.This matrix 12 is made by metal material, such as being stainless steel SUS17-4H.
The manufacture method of this metal injection molding product 10 mainly comprises the steps:
See also Fig. 2, one double-screw bolt 22 is provided, this double-screw bolt is a hollow cylinder, its concrete shape can be different according to actual needs, and such as being square cylinder, circular cylinder or rhombus cylinder, present embodiment is a cylinder, offer one second screwed hole 222 in this double-screw bolt 22, the shape and the sizableness of first screwed hole 12 that the shape of this second screwed hole 222 and size need be attacked with this metal injection molding product 10, this double-screw bolt 22 are made by metal material, as stainless steel SUS304;
Mixing, be about to the even mixing feeding that becomes of metal dust (present embodiment is a stainless steel SUS17-4H powder) and binding agent;
Granulate, be about to this feeding and make 2 ~ 15 microns particle;
Injection moulding, one injection molding (figure does not show) promptly is provided, the die cavity shape of this injection molding is corresponding with the shape of this matrix 12, and be slightly larger than this matrix 12, this particle is heated to the base substrate 24 (seeing also Fig. 3) that is shaped to this matrix 12 in the die cavity that injects this injection molding under the plastifying state, this base substrate 24 forms a mating holes 242 with first screwed hole, 12 corresponding positions of this matrix 12, the shape and the sizableness of the shape of this mating holes 242 and size and this double-screw bolt 22;
See also Fig. 4, double-screw bolt 22 is placed in the mating holes 242 of this base substrate 24 and form preform 20;
Degreasing, promptly by these preform 20 heating being made the binding agent fusing in this base substrate 24, the binding agent of this fusing is by flowing out in this this base substrate 24, thereby remove the binding agent in this base substrate 24, the heating-up temperature that this preform 20 is carried out ungrease treatment is generally 400 degrees centigrade to 700 degrees centigrade;
Sintering, be about to this after degreasing preform 20 heating and make the fusion of metal powder in this base substrate 24 and be bonded in together, simultaneously, in sintering process, this base substrate 24 can shrink, so, this double-screw bolt 22 is incorporated into tightly with this base substrate 24 and forms this metal injection molding product 10, and second screwed hole 222 in this double-screw bolt 22 promptly forms first screwed hole 122 of this metal injection molding product 10, promptly this step is accompanied by sintering and forms this metal injection molding product 10, realizes simultaneously this metal injection molding product 10 is attacked first screwed hole 122.The heating-up temperature that this preform 20 is carried out sintering processes is generally 1000 degrees centigrade to 1300 degrees centigrade;
This binding agent can be polyethylene (Polyethylene), polyvinyl chloride (Polyvinyl Chloride), polystyrene (Polystyrene), polypropylene (Polypropylene), Merlon (Polycarbonate), celluloid (Cellulose Nitrate), phenolic resins (Phenol-Formaldehyde), polyamine fat (Polyurethane), epoxy resin (Epoxide Resin), monose (Monosaccharides), polysaccharide (Polysaccharide) or agar (Agar).
The tapping method of described metal injection molding product 10 is by forming preform 20 in the mating holes 242 that this double-screw bolt 22 is placed this base substrate 24.Then this preform 20 is carried out degreasing, sintering, be accompanied by the carrying out of sintering, this base substrate 24 shrinks, thereby this double-screw bolt 22 is incorporated into tightly with this base substrate 24, thereby reaches the purpose that metal injection molding product 10 is carried out tapping.
Simultaneously, this double-screw bolt 22 had been finished before sintering processes and has been attacked second screwed hole 222, and before sintering processes, hardness of metal materials is lower, promptly this double-screw bolt 22 is attacked second screwed hole 222 under the lower situation of hardness, so, can avoid screw tap fracture when attacking second screwed hole 222, thereby reduce the tapping cost of this metal injection molding product 10.In addition, when in order to improve the structural strength of this metal injection molding product 10, when this matrix 12 is made by the higher hardness metal material, made by rust steel SUS17-4PH such as present embodiment matrix 12, this double-screw bolt 22 can be made by the metal material than soft, makes as adopting stainless steel SUS304, so, because the material hardness of this double-screw bolt 22 is lower, thereby is easier to this this second screwed hole 222 of double-screw bolt 22 inside fire attacks, thereby further avoid the screw tap fracture.
In addition, the shape of this metal injection molding product 10 is generally irregular, thereby is difficult to this metal injection molding product 10 location, and then influences the efficient that this metal injection molding product 10 is carried out tapping.And separate manufacturing owing to this double-screw bolt 22 with this base substrate 24 among the present invention, so, because this double-screw bolt 22 is the cylinder of rule, thereby this double-screw bolt 22 is easy to the location, thereby be convenient at this second screwed hole 222 of this double-screw bolt 22 inside fire attacks, thereby improve the tapping efficient of this metal injection molding product 10.
Be appreciated that, also can offer some grooves 2242 (consulting Fig. 2) on the periphery wall 224 of this double-screw bolt 22, see also Fig. 5, so, when this base substrate 24 shrinks in the sintering processes process, this base substrate 24 will enter in this groove 2242 with these groove 2242 adjacent parts, thereby form the corresponding projection 244 of some and this groove 2242 on the hole wall of this mating holes 242.So, strengthen bond strength between this double-screw bolt 22 and this base substrate 24 by this groove 2242 and engaging of this projection 244.
Claims (10)
- [claim 1] a kind of metal injection molding product, it is characterized in that: this metal injection molding product comprises a matrix and a double-screw bolt, offer a mating holes on this matrix, this double-screw bolt is placed in this mating holes, and this matrix and this double-screw bolt are combined as a whole by the mode of sintering.
- [claim 2] metal injection molding product as claimed in claim 1 is characterized in that: this double-screw bolt inside fire attack has screwed hole.
- [claim 3] metal injection molding product as claimed in claim 1 is characterized in that: this double-screw bolt is established some grooves on its periphery wall, and this matrix forms some projectioies corresponding with this groove on the hole wall of this mating holes, and this projection is sticked in this groove.
- The manufacture method of [claim 4] a kind of metal injection molding product is characterized in that: may further comprise the steps:One double-screw bolt is provided, offers a screwed hole in this double-screw bolt;With the even mixing feeding that becomes of metal dust and binding agent;This feeding made 2 ~ 15 microns particle;This particle is heated under the plastifying state in the die cavity that injects an injection molding molds a base substrate, this base substrate is formed with a mating holes, the shape and the sizableness of the shape of this mating holes and size and this double-screw bolt;This double-screw bolt is placed in the mating holes of this base substrate and form preform;This preform is carried out ungrease treatment and remove binding agent in this base substrate; AndThis preform after degreasing is carried out sintering processes.
- The manufacture method of [claim 5] metal injection molding product as claimed in claim 4 is characterized in that: this matrix is made by stainless steel SUS17-4PH.
- The manufacture method of [claim 6] metal injection molding product as claimed in claim 4 is characterized in that: this double-screw bolt is made by stainless steel SUS304.
- The manufacture method of [claim 7] metal injection molding product as claimed in claim 4 is characterized in that: the temperature that this preform carries out ungrease treatment is 400 degrees centigrade to 700 degrees centigrade.
- The manufacture method of [claim 8] metal injection molding product as claimed in claim 4 is characterized in that: the temperature that this preform carries out sintering processes is 1000 degrees centigrade to 1300 degrees centigrade.
- The manufacture method of [claim 9] metal injection molding product as claimed in claim 4 is characterized in that: this double-screw bolt is a hollow circular cylinder.
- The manufacture method of [claim 10] metal injection molding product as claimed in claim 4, it is characterized in that: this double-screw bolt is established some grooves on its periphery wall, when this base substrate shrinks in the sintering processes process, this base substrate and this groove adjacent part will enter in this groove, thereby form some projectioies corresponding with this groove on the hole wall of this mating holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103005181A CN101530919B (en) | 2008-03-11 | 2008-03-11 | Manufacturing method of metal injection molding product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103005181A CN101530919B (en) | 2008-03-11 | 2008-03-11 | Manufacturing method of metal injection molding product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101530919A true CN101530919A (en) | 2009-09-16 |
| CN101530919B CN101530919B (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008103005181A Expired - Fee Related CN101530919B (en) | 2008-03-11 | 2008-03-11 | Manufacturing method of metal injection molding product |
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| Country | Link |
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| CN (1) | CN101530919B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351542A (en) * | 2011-07-12 | 2012-02-15 | 中南大学 | Preparation method of hollow-structure metal or ceramic part |
| CN103331450A (en) * | 2013-06-14 | 2013-10-02 | 蓝山县金山川粉末冶金有限公司 | Manufacturing method for powder stainless steel filter and insert molding |
| CN103357877A (en) * | 2012-03-30 | 2013-10-23 | 东莞富强电子有限公司 | Metal injection molding processing method |
| CN104174847A (en) * | 2013-05-28 | 2014-12-03 | 米巴烧结奥地利有限公司 | Method of closing a bore |
| CN107745127A (en) * | 2017-10-30 | 2018-03-02 | 杭州智见科技有限公司 | Based on metal powder injection molded female thread machining method |
| CN110857150A (en) * | 2018-08-22 | 2020-03-03 | 浙江恒成硬质合金有限公司 | Balancing weight for satellite and manufacturing process thereof |
| EP4202239A1 (en) | 2021-12-22 | 2023-06-28 | Böllhoff Verbindungstechnik GmbH | Component made of metal or plastic made by means of additive manufacturing with a standard thread |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4332971A1 (en) * | 1993-09-28 | 1995-03-30 | Fischer Artur Werke Gmbh | Process for the production of interlocking parts |
| CN2271633Y (en) * | 1996-09-30 | 1997-12-31 | 阳腾企业股份有限公司 | Nut with elastic fastening structure |
| DE10030257A1 (en) * | 2000-06-20 | 2002-01-03 | Festo Ag & Co | Component with internally-threaded bore connection, includes plastic-metallic bush surrounded by and bonded to plastic, all being produced by injection molding |
| DE102005043997B4 (en) * | 2005-09-14 | 2008-04-17 | Möllerflex GmbH | Component set for forming a composite component and insert component |
-
2008
- 2008-03-11 CN CN2008103005181A patent/CN101530919B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351542A (en) * | 2011-07-12 | 2012-02-15 | 中南大学 | Preparation method of hollow-structure metal or ceramic part |
| CN102351542B (en) * | 2011-07-12 | 2012-12-05 | 中南大学 | Preparation method of hollow-structure metal or ceramic part |
| CN103357877A (en) * | 2012-03-30 | 2013-10-23 | 东莞富强电子有限公司 | Metal injection molding processing method |
| CN104174847A (en) * | 2013-05-28 | 2014-12-03 | 米巴烧结奥地利有限公司 | Method of closing a bore |
| CN103331450A (en) * | 2013-06-14 | 2013-10-02 | 蓝山县金山川粉末冶金有限公司 | Manufacturing method for powder stainless steel filter and insert molding |
| CN107745127A (en) * | 2017-10-30 | 2018-03-02 | 杭州智见科技有限公司 | Based on metal powder injection molded female thread machining method |
| CN110857150A (en) * | 2018-08-22 | 2020-03-03 | 浙江恒成硬质合金有限公司 | Balancing weight for satellite and manufacturing process thereof |
| EP4202239A1 (en) | 2021-12-22 | 2023-06-28 | Böllhoff Verbindungstechnik GmbH | Component made of metal or plastic made by means of additive manufacturing with a standard thread |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101530919B (en) | 2012-05-23 |
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