CN104014796A - Injection molding method for metal powder - Google Patents
Injection molding method for metal powder Download PDFInfo
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- CN104014796A CN104014796A CN201410268096.XA CN201410268096A CN104014796A CN 104014796 A CN104014796 A CN 104014796A CN 201410268096 A CN201410268096 A CN 201410268096A CN 104014796 A CN104014796 A CN 104014796A
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Abstract
The invention provides an injection molding method for metal powder. The method includes the following steps that firstly, the metal powder and a bonding agent are mixed in proportion, a mixture is formed, and an active additive is added to the mixture; secondly, the mixture obtained in the first step is stirred under the heating condition and is further conveyed to an injection molding machine for plasticization; thirdly, the plasticized mixture in the injection molding machine is injected into a mold cavity, and pressure maintaining is conducted on the mixture; fourthly, after cooling and solidification, a mold is opened, and materials are discharged. The injection molding method for the metal powder is simple in process, easy to operate, high in production efficiency, and suitable for metal parts with the small production size, the large batch and the complex shape, and production efficiency of the metal parts is greatly improved.
Description
Technical field
The present invention relates to metal-powder processing technique field, relate in particular to a kind of metal-powder injection molding forming method.
Background technology
Metal-powder refers to that size is less than the metallic particles group of 1mm.Some the infusible compound powder that comprises single metal-powder, alloy powder and have metalline is the main raw material(s) of powder metallurgy.Metal-powder has a wide range of applications, and such as it, can be applicable in the fields such as spraying, catalysis, painted, moulding.
For metal-powder moulding, traditional metal-powder metallurgy has certain limitation aspect powder moulding, and it is not suitable for produces the metal parts that volume is little, batch is large, complex-shaped.For example, some spare and accessory parts of automotive field, aviation accessory, current consumption product etc.Thereby, greatly affected the output of this series products.
Therefore,, for the problems referred to above, be necessary to provide further solution.
Summary of the invention
The object of the present invention is to provide a kind of metal-powder injection molding forming method.
For achieving the above object, a kind of metal-powder injection molding forming method of the present invention, it comprises the steps:
S1. metal-powder is mixed in proportion with binding agent, form mixture, in mixture, add active additive;
S2. the mixture in S1 is carried out under heating condition stir process, and be further delivered in injection machine and plastify;
S3. the mixture that plastifies completion of processing in injection machine is injected in die cavity, and pressurize is processed;
S4. after cooling curing, open mould, discharging.
As a further improvement on the present invention, the average grain diameter of described metal-powder is 0.8-20 μ m.
As a further improvement on the present invention, the viscosity of described binding agent is less than 0.1Pas.
As a further improvement on the present invention, described binding agent comprises wax, plastics and surfactant.
As a further improvement on the present invention, described binding agent accounts for the 40-60% of amount of the mixture in described S1.
As a further improvement on the present invention, described binding agent is polyacetals adhesive.
As a further improvement on the present invention, described pressurize is treated to 2-10min.
As a further improvement on the present invention, described metal-powder injection molding forming method also comprises S5, and described S5 comprises: to forming blank through S4 step process, carry out ungrease treatment, carry out sintering after degreasing.
As a further improvement on the present invention, described ungrease treatment adopts hot ungrease treatment method, and the programming rate of described heat treatment degreasing is 5-10 ℃/min, and the hot ungrease treatment time is 2-3.5h.
As a further improvement on the present invention, described sintering carries out in vacuum drying oven.
Compared with prior art, the invention has the beneficial effects as follows: metal-powder injection molding forming method flow process of the present invention is simple, easy to operate, production efficiency is high.It is applicable to produce the metal parts that volume is little, batch is large, complex-shaped, has greatly improved the production efficiency of this type of metal parts.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of a specific embodiment of metal-powder injection molding forming method of the present invention.
The specific embodiment
Below in conjunction with each embodiment shown in the drawings, the present invention is described in detail; but should be noted that; these embodiments are not limitation of the present invention; those of ordinary skills are according to these embodiment institute work energy, method or structural equivalent transformation or alternative, within all belonging to protection scope of the present invention.
As shown in Figure 1, metal-powder injection molding forming method of the present invention comprises the steps:
S1. metal-powder is mixed in proportion with binding agent, form mixture, in mixture, add active additive;
S2. the mixture in S1 is carried out under heating condition stir process, and be further delivered in injection machine and plastify;
S3. the mixture that plastifies completion of processing in injection machine is injected in die cavity, and pressurize is processed;
S4. after cooling curing, open mould, discharging.
Particularly, in S1, the average grain diameter of described metal-powder is 0.8-20 μ m.When carrying out the mixing of metal-powder and binding agent, guarantee that binding agent accounts for the 40-60% of the two total amount.Wherein, the binding agent of use comprises following component wax, plastics and surfactant.Preferably, binding agent is polyacetals adhesive.In addition, the viscosity of binding agent keeps being less than 0.1Pas.The additive using in described S1 is paraffin.
In S2, mixture is carried out stir process and carried out in screw rod mixer heating condition is in love.
In S3, the time that described pressurize is processed is 2-10min.Further, through S4, processing the product forming is blank, after blank forms, need that it is carried out to the processing of roller limit and process,
Alternately, described metal-powder injection molding forming method also comprises S5, and described S5 comprises: to forming blank through S4 step process, carry out ungrease treatment, carry out sintering after degreasing.Particularly, the product being disposed through roller limit is delivered to degreasing process and processes.During degreasing, preferably adopt hot ungrease treatment method, the programming rate of described heat treatment degreasing is 5-10 ℃/min, and the hot ungrease treatment time is 2-3.5h.
In addition in sintering process, must control the variation of sintering temperature, to obtain highdensity metal parts.In order to guarantee to control the variation of temperature, sintering process is carried out in the vacuum drying oven that can accurately control heating-up temperature.
In sum, metal-powder injection molding forming method flow process of the present invention is simple, easy to operate, production efficiency is high.It is applicable to produce the metal parts that volume is little, batch is large, complex-shaped, has greatly improved the production efficiency of this type of metal parts.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should make description as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (10)
1. a metal-powder injection molding forming method, is characterized in that, described metal-powder injection molding forming method comprises the steps:
S1. metal-powder is mixed in proportion with binding agent, form mixture, in mixture, add active additive;
S2. the mixture in S1 is carried out under heating condition stir process, and be further delivered in injection machine and plastify;
S3. the mixture that plastifies completion of processing in injection machine is injected in die cavity, and pressurize is processed;
S4. after cooling curing, open mould, discharging.
2. metal-powder injection molding forming method according to claim 1, is characterized in that, the average grain diameter of described metal-powder is 0.8-20 μ m.
3. metal-powder injection molding forming method according to claim 1, is characterized in that, the viscosity of described binding agent is less than 0.1Pas.
4. metal-powder injection molding forming method according to claim 1, is characterized in that, described binding agent comprises wax, plastics and surfactant.
5. metal-powder injection molding forming method according to claim 1, is characterized in that, described binding agent accounts for the 40-60% of amount of the mixture in described S1.
6. metal-powder injection molding forming method according to claim 1, is characterized in that, described binding agent is polyacetals adhesive.
7. metal-powder injection molding forming method according to claim 1, is characterized in that, described pressurize is treated to 2-10min.
8. metal-powder injection molding forming method according to claim 1, is characterized in that, described metal-powder injection molding forming method also comprises S5, and described S5 comprises: to forming blank through S4 step process, carry out ungrease treatment, carry out sintering after degreasing.
9. metal-powder injection molding forming method according to claim 8, is characterized in that, described ungrease treatment adopts hot ungrease treatment method, and the programming rate of described heat treatment degreasing is 5-10 ℃/min, and the hot ungrease treatment time is 2-3.5h.
10. metal-powder injection molding forming method according to claim 8, is characterized in that, described sintering carries out in vacuum drying oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268096.XA CN104014796A (en) | 2014-06-16 | 2014-06-16 | Injection molding method for metal powder |
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| CN201410268096.XA CN104014796A (en) | 2014-06-16 | 2014-06-16 | Injection molding method for metal powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106216684A (en) * | 2016-08-01 | 2016-12-14 | 合肥佳瑞林电子技术有限公司 | A kind of Shooting Technique of radar metalwork |
| CN107259726A (en) * | 2017-07-14 | 2017-10-20 | 中国地质大学（武汉） | A kind of fixed-type method of metal dust |
| CN109108267A (en) * | 2018-08-03 | 2019-01-01 | 深圳市富荣新材料科技有限公司 | A kind of composition, preparation method and the application in metal injection molded moulding material field |
| TWI650017B (en) * | 2015-06-26 | 2019-02-01 | 寧波舜宇光電信息有限公司 | Camera module bracket based on metal powder molding, manufacturing method and application thereof |
-
2014
- 2014-06-16 CN CN201410268096.XA patent/CN104014796A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI650017B (en) * | 2015-06-26 | 2019-02-01 | 寧波舜宇光電信息有限公司 | Camera module bracket based on metal powder molding, manufacturing method and application thereof |
| CN106216684A (en) * | 2016-08-01 | 2016-12-14 | 合肥佳瑞林电子技术有限公司 | A kind of Shooting Technique of radar metalwork |
| CN107259726A (en) * | 2017-07-14 | 2017-10-20 | 中国地质大学（武汉） | A kind of fixed-type method of metal dust |
| CN107259726B (en) * | 2017-07-14 | 2018-12-18 | 中国地质大学（武汉） | A method of the metal powder for jewellery is fixed-type |
| CN109108267A (en) * | 2018-08-03 | 2019-01-01 | 深圳市富荣新材料科技有限公司 | A kind of composition, preparation method and the application in metal injection molded moulding material field |
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Application publication date: 20140903 |
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