CN107999769A - A kind of method that mobile phone center is made of metal injection moulding - Google Patents
A kind of method that mobile phone center is made of metal injection moulding Download PDFInfo
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- CN107999769A CN107999769A CN201711380020.6A CN201711380020A CN107999769A CN 107999769 A CN107999769 A CN 107999769A CN 201711380020 A CN201711380020 A CN 201711380020A CN 107999769 A CN107999769 A CN 107999769A
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- mobile phone
- phone center
- injection moulding
- metal
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- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
A kind of method that mobile phone center is made of metal injection moulding, according to the required material selection metal dust of mobile phone center, and is ground metal dust, sieves after grinding, be divided into the metal dust of different-grain diameter；The metal dust of different-grain diameter is added in mixer after batch mixing with binding agent by several times again, then is granulated, uniform feeding is made；The shaping base obtained again with injection moulding, sintering densification becomes final finished after ungrease treatment.This method is preferably overcome using various defects caused by injection moulding and dry-pressing formed manufacture mobile phone center, the straight forming mobile phone center of complicated shape, reduces engraving, grinding process, reduces and wastes, enhance product performance, and the contraction change of the final products so obtained is seldom.
Description
Technical field
The present invention relates to a kind of production method of mobile phone center, refers in particular in a kind of metal injection molded making mobile phone
The method of frame, this kind of metal injection molded method for making mobile phone center is to be made using metal injection molding technology in mobile phone
Frame, is mainly used for the making processing of mobile phone center, belongs to metal injection molded manufacture technology field.
Background technology
In recent years, the production generally use hot die-casting molding of mobile phone center and dry-pressing formed technology, then add by thick again
The cumbersome process such as work, finishing are made.Though this manufacture craft is simple, very backward, and has during following process
Pollution, high rejection rate and wastes lot of materials, and technology content is relatively low.The product burr of preparation is more, low precision, is easily imitated.
There is significant limitation in terms of material at the same time, only utilized in iron, copper, zinc, nickel etc.；Cannot be in stainless steel, hard
It has breakthrough in terms of the materials such as matter alloy, aluminium oxide, zirconium oxide, can only realizes simple two dimension shaping, energy in the production process
Difficult one-pass molding produces complicated shape or the internal mobile phone center for having hollow out.
On the other hand, metal injection moulding (Metal Injection Molding, abbreviation MIM) is a kind of from plastics note
The novel powder metallurgy near-net-shape technology for extending out is penetrated in forming industry, it is well known that injection molding of plastics technology is cheap
Price produce the products of various complicated shapes, but plastic products intensity is not high, in order to improve its performance, can add in the plastic
Add metal or ceramic powders to obtain the product that intensity is higher, wearability is good.In recent years, development evolvement is maximum to this idea
Improve to limit the content of solids and remove no-bonder completely in subsequent sintering process and be densified shaping base.
This new powder metallurgy formation method is known as metal injection moulding.But metal injection moulding is not seen still in mobile phone center
Application, and due to mobile phone center need to carry out among hollow out, and interior shape is complicated, using existing metal injection into
Shape it is standby go out base substrate be easy to the problem of various defects such as cavity, bubbling, cracking, deformation occur in degreasing and sintering process,
Therefore how metal injection moulding is applied to mobile phone center and still needed and want discussion for further research.
By patent retrieval and do not find there be the patent literature constructed with the present invention, have certain relation with the present invention
Patent mainly have it is following：
1st, Patent No. CN201720163101.X, entitled " a kind of metal injection molded cell-phone camera frame injection mould structure "
Utility model patent, which disclose a kind of metal injection molded cell-phone camera frame injection mould structure, including preceding core rod
With rear core rod, in the preceding core rod cutting have with the matched preceding core rod mold insert hole of preceding core rod mold insert institute, and at the center of preceding core rod
And cutting has preceding mould centre bore, the lower surface polishing of the preceding core rod has preceding core rod cavity, and being cut in the rear core rod has with after
The matched rear mold core pattern chamber of core rod mold insert institute, the rear mold core pattern chamber is combined with preceding core rod cavity forms blank product through injection.
2nd, Patent No. CN200780033070.5, the patent of invention of entitled " metal injection moulding method ", the patent are public
A kind of metal injection moulding method is opened.Specifically, the present invention relates to it is a kind of by aluminum or aluminum alloy it is metal injection molded come
The method for forming product, the described method comprises the following steps：Formed containing aluminium powder or Al alloy powder or both and optionally deposited
Ceramic particle, binding agent and sintering aid including low-melting-point metal mixture；It is injection moulded mixture；Remove viscous
Agent is tied, forms green compact；Green compact are sintered, the sintering is carried out in the atmosphere containing nitrogen and in the presence of oxygen absorbent.
3rd, Patent No. CN201611147169.5, the patent of invention of entitled " a kind of metal injection molding technology " should
Patent discloses a kind of metal injection molding technology, comprises the following steps：A) dispensing：By micro-sized metal powder and special binder
Agent is added in mixer and is warmed to 190~210 DEG C of progress mixings, and room temperature is cooled into blend feedstock, the micron order gold
The quality proportioning for belonging to powder and special binders is：Micro-sized metal powder is：70~95%, special binders are：5~
30%, the special binders include following components and each component quality proportioning is：Microwax is：25%~35%, tristearin is：
8%, high density polyethylene (HDPE) is：38%~42%, polypropylene is：5%~15%；B) it is molded：Blend feedstock is heated to 190 again
It is expelled to after~210 DEG C in ready-made mold cavity, formation injection moulding base and etc..
Although some has been related to metal injection moulding to these above-mentioned patents, and also metal injection molded propose is changed
Into technical solution, but do not suggest that and solve metal injection moulding in the problems of mobile phone center, it prepares base substrate de-
It is easy to the problem of various defects such as cavity, bubbling, cracking, deformation occur in fat and sintering process, so as to influence product
Yield rate and quality problems are not still solved effectively, therefore are simply made of current metal injection moulding
Mobile phone center is not all right, cannot still solve the problems, such as that mobile phone center is injection molding existing, therefore still need further to be subject to
Improve.
The content of the invention
The problem of it is an object of the invention to in the presence of existing mobile phone center manufacturing process, propose a kind of new hand
The production method of machine center, the production method of the mobile phone center can use metal injection moulding to make mobile phone center, system
It is standby go out the mobile phone center straight forming mobile phone center of complicated shape, having reduces engraving, grinding process, reduce and waste,
The characteristics of enhancing product performance.
In order to reach this purpose, the present invention provides a kind of side that mobile phone center is made of metal injection moulding
Method, according to the required material selection metal dust of mobile phone center, and is ground metal dust, sieves, be divided into after grinding
The metal dust of different-grain diameter；The metal dust of different-grain diameter is added in mixer after batch mixing with binding agent by several times again, then into
Row is granulated, and uniform feeding is made；The shaping base obtained again with injection moulding, sintering densification becomes most after ungrease treatment
Finally finished.
Further, the metal dust for being divided into different-grain diameter is that the metal dust that will be sieved after grinding is divided into three
Class, the first kind are 15-40um coarse granule metal dusts；Second class is the middle granular metal powder of 5-15um；Three classes are≤5um
Fine-grained metals powder.
Further, it is first will that the metal dust by different-grain diameter adds batch mixing in mixer with binding agent by several times
Binding agent is added in mixer, adds coarse granule metal dust and binding agent mixing 20-30 minutes, particulate gold in then adding
Belong to powder, then mixing 20-30 minutes, be eventually adding fine-grained metals powder, then mixing 15-30 minutes, uniform feeding is made；
Temperature is controlled during mixing at 15-30 DEG C.
Further, the shaping base obtained with injection moulding is that uniform feeding will be made to be sent into injection (mo(u)lding) machine
It is interior, shaping base is made by injection moulding.
Further, the metal dust, including Multiple Type powder of stainless steel, alloy powder and ceramic powders.
Further, the binding agent uses thermoplastic systems binding agent or thermosetting property system binding agent.
Further, the method that mobile phone center is made of metal injection moulding comprises the following steps：
1st, mobile phone center injection molding is designed；
2nd, metal dust is selected；
3rd, suitable binding agent is selected；
4th, metal dust and binding agent are added by a certain percentage to take out after batch mixing in mixer and are granulated；
5th, step 4 process is made into the injection feeding of grain and prepares the mobile phone center base substrate that we want by injection moulding；
6th, the mobile phone center base substrate prepared is sloughed binding agent in base substrate by degreasing；
7th, sinter the good mobile phone center of above-mentioned degreasing and form finished product.
The advantage of the invention is that：
The present invention takes metal injection moulding to make mobile phone center, at a certain temperature using appropriate method metal
Powder and binding agent are mixed into uniform feeding, after granulation, then are injection moulded, and the base substrate after shaping is by degreasing
Desired various mobile phone centers of different shapes are sintered into after processing.This method preferably overcomes using injection moulding and does
Various defects caused by molded manufacture mobile phone center, the straight forming mobile phone center of complicated shape, reduces engraving, mill
Process is cut, reduces and wastes, enhance product performance, and the contraction change of the final products so obtained is seldom.
Embodiment
With reference to specific embodiment, the present invention is further explained.
Embodiment one
A kind of method that mobile phone center is made of metal injection moulding, according to the required material selection of mobile phone center not
Rust powdered steel, and powder of stainless steel is ground, sieve after grinding, be divided into the metal dust of different-grain diameter；Again by different grains
The powder of stainless steel in footpath is added in mixer after batch mixing with binding agent by several times, then is granulated, and uniform feeding is made；Again with note
The shaping base that shaping obtains is penetrated, sintering densification becomes final finished after ungrease treatment.
Further, the powder of stainless steel for being divided into different-grain diameter is that the metal dust that will be sieved after grinding is divided into three
Class, the first kind are 15-40um coarse granule powder of stainless steel；Second class is the middle particle powder of stainless steel of 5-15um；Three classes are
The fine grained powder of stainless steel of≤5um.
Further, it is first that the powder of stainless steel by different-grain diameter adds batch mixing in mixer with binding agent by several times
Binding agent is added in mixer, adds coarse granule powder of stainless steel and binding agent mixing 20-30 minute, then in addition
Grain powder of stainless steel, then mixing 20-30 minute, are eventually adding fine grained powder of stainless steel, then mixing 15-30 minutes, are made equal
Even feeding；Temperature is controlled during mixing at 15-30 DEG C.
Further, the shaping base obtained with injection moulding is that uniform feeding will be made to be sent into injection (mo(u)lding) machine
It is interior, shaping base is made by injection moulding.
Further, the binding agent uses thermoplastic systems binding agent, including paraffinic base, oil base and thermoplasticity polymerization
Thing based binder.
Further, the method that mobile phone center is made of metal injection moulding comprises the following steps：
1st, mobile phone center injection molding is designed；
2nd, metal dust is selected；
3rd, suitable binding agent is selected；
4th, metal dust and binding agent are added by a certain percentage to take out after batch mixing in mixer and are granulated；
5th, step 4 process is made into the injection feeding of grain and prepares the mobile phone center base substrate that we want by injection moulding；
6th, the mobile phone center base substrate prepared is sloughed binding agent in base substrate by degreasing；
7th, sinter the good mobile phone center of above-mentioned degreasing and form finished product.
The advantage of the invention is that：
1) present invention takes metal injection moulding to make mobile phone center, at a certain temperature using appropriate method gold
Belong to powder and binding agent is mixed into uniform feeding, after granulation, then be injection moulded, the base substrate after shaping is by de-
Desired various mobile phone centers of different shapes are sintered into after fat processing.This method preferably overcome using injection moulding and
Various defects caused by dry-pressing formed manufacture mobile phone center, the straight forming mobile phone center of complicated shape, reduce engraving,
Grinding process, reduces and wastes, enhance product performance, and the contraction change of the final products so obtained is seldom.
Embodiment two
As the principle of embodiment one, simply taken mold materials and slurry parameter have not same embodiment two, are
A kind of method that mobile phone center is made of metal injection moulding, according to the required material selection alloyed powder of mobile phone center
End, and alloy powder is ground, sieve after grinding, be divided into the alloy powder of different-grain diameter；Again by the alloy of different-grain diameter
Powder is added in mixer after batch mixing with binding agent by several times, then is granulated, and uniform feeding is made；Obtained again with injection moulding
Shaping base, sintering densification becomes final finished after ungrease treatment.
Further, the alloy powder for being divided into different-grain diameter is that the alloy powder that will be sieved after grinding is divided into three
Class, the first kind are 20-30um coarse granule alloy powders；Second class is the middle particle alloy powder of 6-10um；Three classes are≤5um
Fine grained alloy powder.
Further, it is first will that the alloy powder by different-grain diameter adds batch mixing in mixer with binding agent by several times
Binding agent is added in mixer, adds coarse granule metal dust and binding agent mixing 20-30 minutes, and particle closes in then adding
Bronze end, then mixing 20-30 minutes, are eventually adding fine grained alloy powder, then mixing 15-30 minutes, and uniform feeding is made；
Temperature is controlled during mixing at 15-30 DEG C.
Further, the shaping base obtained with injection moulding is that uniform feeding will be made to be sent into injection (mo(u)lding) machine
It is interior, shaping base is made by injection moulding.
Further, the binding agent uses thermosetting property system binding agent, including furans hydroxy-aromatic resin, polyamide,
And function groups epoxy resin.
Further, the method that mobile phone center is made of metal injection moulding comprises the following steps：
1st, mobile phone center injection molding is designed；
2nd, alloy powder is selected；
3rd, suitable binding agent is selected；
4th, alloy powder and binding agent are added by a certain percentage to take out after batch mixing in mixer and are granulated；
5th, step 4 process is made into the injection feeding of grain and prepares the mobile phone center base substrate that we want by injection moulding；
6th, the mobile phone center base substrate prepared is sloughed binding agent in base substrate by degreasing；
7th, sinter the good mobile phone center of above-mentioned degreasing and form finished product.
Embodiment three
As the principle of embodiment one, simply taken mold materials and slurry parameter have not same embodiment three, are
A kind of method that mobile phone center is made of metal injection moulding, according to the required material selection ceramic powder of mobile phone center
End, and ceramic powders are ground, sieve after grinding, be divided into the ceramic powders of different-grain diameter；Again by the ceramics of different-grain diameter
Powder is added in mixer after batch mixing with binding agent by several times, then is granulated, and uniform feeding is made；Obtained again with injection moulding
Shaping base, sintering densification becomes final finished after ungrease treatment.
Further, the ceramic powders for being divided into different-grain diameter are that the ceramic powders that will be sieved after grinding are divided into three
Class, the first kind are 15-30um ceramic coarse particle powder；Second class is the middle grained ceramic powders of 6-15um；Three classes are≤5um
Fine grained ceramic powders.
Further, it is first will that the ceramic powders by different-grain diameter add batch mixing in mixer with binding agent by several times
Binding agent is added in mixer, adds ceramic coarse particle powder and binding agent mixing 20-30 minutes, and particle is made pottery in then adding
Porcelain powder, then mixing 25-30 minutes, are eventually adding fine grained ceramic powders, then mixing 25-30 minutes, and uniform feeding is made；
Temperature is controlled during mixing at 15-30 DEG C.
Further, the shaping base obtained with injection moulding is that uniform feeding will be made to be sent into injection (mo(u)lding) machine
It is interior, shaping base is made by injection moulding.
Further, the binding agent uses thermoplastic systems binding agent or thermosetting property system binding agent.
Further, the method that mobile phone center is made of metal injection moulding comprises the following steps：
1st, mobile phone center injection molding is designed；
2nd, ceramic powders are selected；
3rd, suitable binding agent is selected；
4th, ceramic powders and binding agent are added by a certain percentage to take out after batch mixing in mixer and are granulated；
5th, step 4 process is made into the injection feeding of grain and prepares the mobile phone center base substrate that we want by injection moulding；
6th, the mobile phone center base substrate prepared is sloughed binding agent in base substrate by degreasing；
7th, sinter the good mobile phone center of above-mentioned degreasing and form finished product.
It will be apparent that it should be understood that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention,
After reading the present invention, modification of the those skilled in the art to the various equivalent forms of the present invention each falls within right appended by the application will
Seek limited range.
The advantage of the invention is that：
The present invention takes metal injection moulding to make mobile phone center, at a certain temperature using appropriate method metal
Powder and binding agent are mixed into uniform feeding, after granulation, then are injection moulded, and the base substrate after shaping is by degreasing
Desired various mobile phone centers of different shapes are sintered into after processing.This method preferably overcomes using injection moulding and does
Various defects caused by molded manufacture mobile phone center, the straight forming mobile phone center of complicated shape, reduces engraving, mill
Process is cut, reduces and wastes, enhance product performance, and the contraction change of the final products so obtained is seldom.
Claims (7)
- A kind of 1. method that mobile phone center is made of metal injection moulding, according to the required material selection of mobile phone center Metal dust, and metal dust is ground, sieve after grinding, be divided into the metal dust of different-grain diameter；Again by different-grain diameter Metal dust added by several times with binding agent in mixer after batch mixing, then be granulated, uniform feeding be made；Again with being injected into The shaping base that shape obtains, sintering densification becomes final finished after ungrease treatment.
- 2. the method for mobile phone center is made of metal injection moulding as claimed in claim 1, it is characterised in that：It is described The metal dust for being divided into different-grain diameter be that the metal dust that will be sieved after grinding is divided into three classes, the first kind is thick of 15-40um Grain metal dust；Second class is the middle granular metal powder of 5-15um；Three classes for≤5um fine-grained metals powder.
- 3. the method for mobile phone center is made of metal injection moulding as claimed in claim 1, it is characterised in that：It is described By the metal dust of different-grain diameter by several times and binding agent to add batch mixing in mixer be first to add binding agent in mixer, then Coarse granule metal dust and binding agent mixing 20-30 minutes are added, granular metal powder in then adding, then 20-30 points of mixing Clock, is eventually adding fine-grained metals powder, then mixing 15-30 minutes, and uniform feeding is made；Temperature is controlled during mixing in 15- 30℃。
- 4. the method for mobile phone center is made of metal injection moulding as claimed in claim 3, it is characterised in that：It is described The shaping base obtained with injection moulding be that uniform feeding will be made to be sent into injection (mo(u)lding) machine, be made into by injection moulding Shape base.
- 5. the method for mobile phone center is made of metal injection moulding as claimed in claim 1, it is characterised in that：It is described Metal dust, including Multiple Type powder of stainless steel, alloy powder and ceramic powders.
- 6. the method for mobile phone center is made of metal injection moulding as claimed in claim 1, it is characterised in that：It is described Binding agent use thermoplastic systems binding agent or thermosetting property system binding agent.
- 7. the method for mobile phone center is made of metal injection moulding as claimed in claim 1, it is characterised in that：It is described Using metal injection moulding make mobile phone center method comprise the following steps：1）Design mobile phone center injection molding；2）Select metal dust；3）Select suitable binding agent；4）Metal dust and binding agent are added by a certain percentage to take out after batch mixing in mixer and are granulated；5）Step 4 process has been made into the injection feeding of grain and has prepared the mobile phone center base substrate that we want by injection moulding；6）The mobile phone center base substrate prepared is sloughed binding agent in base substrate by degreasing；7）Sinter the good mobile phone center of above-mentioned degreasing and form finished product.
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| CN201711380020.6A CN107999769A (en) | 2017-12-20 | 2017-12-20 | A kind of method that mobile phone center is made of metal injection moulding |
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| CN201711380020.6A CN107999769A (en) | 2017-12-20 | 2017-12-20 | A kind of method that mobile phone center is made of metal injection moulding |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347047A (en) * | 2018-12-24 | 2020-06-30 | 梅科股份公司 | Method for manufacturing decorative article |
| CN112453408A (en) * | 2020-11-06 | 2021-03-09 | 东莞华晶粉末冶金有限公司 | Preparation method of stainless steel high-density electronic product shell |
| CN113145848A (en) * | 2021-04-26 | 2021-07-23 | 佛山亘易隆科技有限公司 | Grinding assembly, manufacturing method thereof and coffee machine |
| CN114147225A (en) * | 2021-11-16 | 2022-03-08 | 江苏金物新材料有限公司 | Method for realizing metal injection molding of complex metal parts through thermal curing |
-
2017
- 2017-12-20 CN CN201711380020.6A patent/CN107999769A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347047A (en) * | 2018-12-24 | 2020-06-30 | 梅科股份公司 | Method for manufacturing decorative article |
| CN111347047B (en) * | 2018-12-24 | 2022-08-16 | 梅科股份公司 | Method for manufacturing decorative article |
| CN112453408A (en) * | 2020-11-06 | 2021-03-09 | 东莞华晶粉末冶金有限公司 | Preparation method of stainless steel high-density electronic product shell |
| CN113145848A (en) * | 2021-04-26 | 2021-07-23 | 佛山亘易隆科技有限公司 | Grinding assembly, manufacturing method thereof and coffee machine |
| CN114147225A (en) * | 2021-11-16 | 2022-03-08 | 江苏金物新材料有限公司 | Method for realizing metal injection molding of complex metal parts through thermal curing |
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