CN105195745A - Method for manufacturing mobile phone middle frame through powder injection forming technology - Google Patents
Method for manufacturing mobile phone middle frame through powder injection forming technology Download PDFInfo
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- CN105195745A CN105195745A CN201510655496.0A CN201510655496A CN105195745A CN 105195745 A CN105195745 A CN 105195745A CN 201510655496 A CN201510655496 A CN 201510655496A CN 105195745 A CN105195745 A CN 105195745A
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Abstract
The invention relates to the technical field of powder metallurgy, and particularly discloses a method for manufacturing a mobile phone middle frame through a powder injection forming technology. The method includes the following steps that S1, spare parts of the middle frame are manufactured through the powder injection forming technology; S2, positioning holes are machined in the prepared spare parts of the middle frame, and are riveted through rivets by means of a combined clamp, and T treatment is conducted after internal dimensions are subjected to fine trimming; S3, the spare parts of the middle frame are connected together through in-mold injection molding, then finish machining of the dimensions and appearance is conducted, and finally appearance aftertreatment is carried out so that the final mobile phone middle frame can be obtained. By the adoption of the method, the defects that according to an existing metal mobile phone middle frame, monoblock metal is used for CNC machining of raw materials, so that consumption is large and cost is high are overcome; production efficiency is greatly improved, and a large number of materials, labor, machine tools and the like are omitted.
Description
Technical field
The present invention relates to powder metallurgical technology, be specifically related to a kind of method utilizing Powder Injection Molding Technology to manufacture mobile phone center.
Background technology
Along with the development of mobile phone industry, consumer has higher requirement to the feel of mobile phone, shatter-resistant, anticorrosive and appearance property etc., and wherein metallic mobile phone center more and more becomes main flow with its distinctive feature.At present, the common method of metallic mobile phone center has: monoblock aluminium alloy, corrosion resistant plate etc. are shaped by CNC by (1), and its feature technology is comparatively simple, is current common method, but to be raw material availability low for it, and consume large, and working (machining) efficiency is low, cost is high.(2) forge center general shape by the mode of forging and stamping, processed by follow-up CNC, its feature comparatively method (1) decreases CNC allowance, enhances productivity, and shortcoming is the poor and CNC processing capacity of forging precision or larger.(4) some low-melting alloys are by casting forming, then are processed into center through CNC, are characterized in for some low-melting alloys, cost is lower, easily produces in batches, but fabricated product surface compact degree is inadequate, easy generation segregation phenomena, structural homogenity is poor, does not reach requirement after outward appearance process.
Patent of invention CN201410265835 proposes a kind of preparation method of mobile phone center, alloy material used for mobile phone center operation molding by extrusion is first obtained the extrusion section bar of bar shaped hollow by it, then adopt CNC machine to be cut according to thickness requirement by the section bar of described bar shaped hollow, finally the object cut down is carried out post processing and obtain described mobile phone center.Be characterized in enhancing productivity, but be difficult to be shaped for some dystectic materials.
Summary of the invention
Technical problem to be solved by this invention is, in order to overcome the above-mentioned technological deficiency that in prior art, mobile phone center preparation method exists, and a kind of method utilizing Powder Injection Molding Technology to manufacture mobile phone center.
Above-mentioned technical problem to be solved by this invention, is achieved by the following technical programs:
Utilize Powder Injection Molding Technology to manufacture a method for mobile phone center, comprise following steps:
S1. by power injection molding, center loose mail is manufactured;
S2. locating and machining hole on the center loose mail prepared, then couples together through built-up jig, carries out T process after refine inside dimension;
S3. by in-mould injection, center loose mail is coupled together, then carry out finishing size and profile, finally carry out outward appearance post processing again and obtain final mobile phone center.
The invention provides method that is a kind of and the manufacture mobile phone center of the diverse novel technical route of prior art.This process employs Powder Injection Molding Technology and prepare mobile phone center loose mail, follow-uply to process in conjunction with a small amount of CNC, by inmold injection technique composition mobile phone center after T process, avoiding metal current mobile phone center adopts block of metal CNC processing raw materials consumption amount large, the shortcoming that cost is high, improve production efficiency greatly, save a large amount of materials, manpower, lathe etc.Compared with conventional technique, the raw material effective rate of utilization of the method can reach 50-90%, and production efficiency can improve more than 80%, CNC processing cost can reduce 50%-80%, creates qualitative leap, in mobile phone center technology of preparing, achieve great breakthrough.And extend the range of choice of middle frame material.
Preferably, described method, for the manufacture of metal or ceramic material mobile phone center.
More preferably, described method, for the manufacture of the mobile phone center of materials with high melting point.
The method also can solve the defect that prior art utilizes materials with high melting point to prepare mobile phone center to be difficult to be shaped, and the product density prepared evenly and have very excellent hot strength and percentage elongation.
Most preferably, described method, for the manufacture of stainless steel mobile phone center or titanium alloy mobile phone center.
Preferably, the method that the power injection molding described in S1. manufactures center loose mail is: first frame material in mobile phone is made feeding, and then be expelled in center loose mail mould, must manufacture center loose mail after degreasing and sintering.
More preferably, S1. the method that described power injection molding manufactures center loose mail is: first powder of stainless steel is made feeding, be heated to 190 ~ 200 DEG C, then feeding being expelled to mould temperature is in the center loose mail mould of 105 ~ 125 DEG C, then must manufacture center loose mail after degreasing and sintering; Described sintering condition is: rise to 500 ~ 530 DEG C with the speed of 4 ~ 6 DEG C/min, keeps 0.8 ~ 1.5h, finally temperature is risen to 1250 ~ 1380 DEG C with the speed of 4 ~ 6 DEG C/min, lowers the temperature after keeping 2 ~ 4h.
More preferably, S1. the method that described power injection molding manufactures center loose mail is: first titanium alloy is made feeding, be heated to 160 ~ 180 DEG C, then feeding being expelled to mould temperature is in the center loose mail mould of 110 ~ 130 DEG C, then must manufacture center loose mail after degreasing and sintering; Described sintering condition is: regulate vacuum to be 10
-3pa, rises to 340 ~ 360 DEG C with the speed of 1 ~ 3 DEG C/min, keeps 0.3 ~ 0.6h, and then temperature is risen to 500 ~ 530 DEG C with the speed of 1 ~ 3 DEG C/min, keep 0.5 ~ 1.5h, finally temperature is risen to 1200 ~ 1300 DEG C with the speed of 3 ~ 6 DEG C/min, lower the temperature after keeping 2 ~ 4h.
Preferably, the center loose mail described in S2. passes through rivet through built-up jig.
Preferably, in S2. on the center loose mail prepared by CNC locating and machining hole.
Preferably, CNC finishing size and profile is passed through in S3..
beneficial effect:the invention provides method that is a kind of and the manufacture mobile phone center of the diverse novel technical route of prior art, described method, avoiding metal current mobile phone center adopts block of metal CNC processing raw materials consumption amount large, the shortcoming that cost is high, improve production efficiency greatly, save a large amount of materials, manpower, lathe etc.In addition, the product density for preparing of the present invention evenly and have very excellent hot strength and percentage elongation.
Accompanying drawing explanation
Fig. 1 is the method process route chart utilizing Powder Injection Molding Technology to manufacture mobile phone center.
Detailed description of the invention
Explain the present invention further below in conjunction with specific embodiment, but embodiment does not limit in any form to the present invention.
In the embodiment of the present invention, the method for testing of product density is see MetalPowderIndustriesFederation (MPIF) Standard42.
In the embodiment of the present invention, the method for testing of hot strength is see MetalPowderIndustries
Federation(MPIF)Standard50。
In the embodiment of the present invention, the method for testing of percentage elongation is see MetalPowderIndustriesFederation (MPIF) Standard59.
Embodiment 1 one kinds utilizes Powder Injection Molding Technology to manufacture 316L stainless steel mobile phone center
First by power injection molding, center loose mail is manufactured: by injection machine, 316L stainless steel feeding is heated to 195 DEG C, mould temperature 110 DEG C, be expelled in center loose mail mould, after degreasing, rise to 520 DEG C with the speed of 5 DEG C/min, keep 1h, finally temperature is risen to 1350 DEG C with the speed of 5 DEG C/min, lower the temperature after keeping 3h, finally sintered center loose mail goods, density about 98%, hot strength is greater than 450MPa, and percentage elongation is greater than 50%; By CNC locating and machining hole after shaping, adopt rivet through special fixture combination, carry out T process after refine inside dimension, by in-mould injection, center loose mail is coupled together, again by CNC finishing size and profile, finally carry out outward appearance post processing again and obtain final mobile phone center.
Embodiment 2 one kinds utilizes Powder Injection Molding Technology to manufacture 304 stainless steel mobile phone centers
One utilizes Powder Injection Molding Technology to manufacture 304 stainless steel mobile phone centers, first power injection molding is passed through, manufacture center loose mail: by injection machine, 304 stainless steel feedings are heated to 190 DEG C, mould temperature 120 DEG C, be expelled in center loose mail mould, after degreasing, 520 DEG C are risen to the speed of 5 DEG C/min, keep 1h, finally temperature is risen to 1280 DEG C with the speed of 5 DEG C/min, lower the temperature after keeping 3h, finally sintered center loose mail goods, density is greater than 97%, and hot strength is greater than 450MPa, and percentage elongation is greater than 50%; By CNC locating and machining hole after shaping, adopt rivet through special fixture combination, carry out T process after refine inside dimension, by in-mould injection, center loose mail is coupled together, again by CNC finishing size and profile, finally carry out outward appearance post processing again and obtain final mobile phone center.
Embodiment 3 one kinds utilizes Powder Injection Molding Technology to manufacture titanium alloy mobile phone center
One utilizes Powder Injection Molding Technology to manufacture titanium alloy mobile phone center, first by power injection molding, manufactures center loose mail: by injection machine, titanium alloy feeding is heated to 170 DEG C, mould temperature 120 DEG C, be expelled in center loose mail mould, after degreasing, regulate vacuum to be 10
-3pa, first temperature is risen to 350 DEG C gradually with the speed of 2 DEG C/min, keep 0.5h, and then temperature is risen to 520 DEG C gradually with the speed of 2 DEG C/min, keep 1h, finally temperature is risen to 1250 DEG C with the speed of 5 DEG C/min, lower the temperature after keeping 3h, finally sintered center loose mail goods, density about 95%, hot strength 550MPa, percentage elongation is 10%.By CNC locating and machining hole, adopt rivet through special fixture combination, carry out T process after refine inside dimension, by in-mould injection, center loose mail is coupled together, again by CNC finishing size and profile, finally carry out outward appearance post processing again and obtain final mobile phone center.
The happy Max of mobile phone adopts the 357g whole plate aluminium sheet that weighs to process final 37.5g finished product mobile phone center shell, and stock utilization only had 10%, CNC process time more than 100 minutes.And utilize the Powder Injection Molding Technology described in the embodiment of the present invention 1 and 2 to manufacture the method for mobile phone center at present, stainless steel mobile phone center is manufactured by four loose mail combined types, injection moulding four loose mails are shaped the same with traditional plastic-injection, can realize producing in enormous quantities, four loose mail gross masses are 50g, final finished center outer cover quality is 25g, stock utilization reaches 50%, comparatively conventional bulk formula processing raising 40%, after optimizing, its whole CNC processing can control in 50 minutes, process time reduces more than 50%, product material product utilization rate can be made to increase substantially further subsequently through adjusting further, and reduce CNC processing capacity further, further can increase substantially production capacity.
Claims (10)
1. utilize Powder Injection Molding Technology to manufacture a method for mobile phone center, it is characterized in that, comprise following steps:
S1. by power injection molding, center loose mail is manufactured;
S2. locating and machining hole on the center loose mail prepared, then couples together through built-up jig, carries out T process after refine inside dimension;
S3. by in-mould injection, center loose mail is coupled together, then carry out finishing size and profile, finally carry out outward appearance post processing again and obtain final mobile phone center.
2. method according to claim 1, is characterized in that, for the manufacture of metal or ceramic material mobile phone center.
3. method according to claim 1, is characterized in that, for the manufacture of the mobile phone center of materials with high melting point.
4. method according to claim 3, is characterized in that, for the manufacture of stainless steel mobile phone center or titanium alloy mobile phone center.
5. method according to claim 1, it is characterized in that, S1. the method that described power injection molding manufactures center loose mail is: first frame material in mobile phone is made feeding, and then be expelled in center loose mail mould, must manufacture center loose mail after degreasing and sintering.
6. the method according to claim 4 or 5, it is characterized in that, S1. the method that described power injection molding manufactures center loose mail is: first powder of stainless steel is made feeding, be heated to 190 ~ 200 DEG C, then feeding being expelled to mould temperature is in the center loose mail mould of 105 ~ 125 DEG C, then must manufacture center loose mail after degreasing and sintering; Described sintering condition is: rise to 500 ~ 530 DEG C with the speed of 4 ~ 6 DEG C/min, keeps 0.8 ~ 1.5h, finally temperature is risen to 1250 ~ 1380 DEG C with the speed of 4 ~ 6 DEG C/min, lowers the temperature after keeping 2 ~ 4h.
7. the method according to claim 4 or 5, it is characterized in that, S1. the method that described power injection molding manufactures center loose mail is: first titanium alloy is made feeding, be heated to 160 ~ 180 DEG C, then feeding being expelled to mould temperature is in the center loose mail mould of 110 ~ 130 DEG C, then must manufacture center loose mail after degreasing and sintering; Described sintering condition is: regulate vacuum to be 10
-3pa, rises to 340 ~ 360 DEG C with the speed of 1 ~ 3 DEG C/min, keeps 0.3 ~ 0.6h, and then temperature is risen to 500 ~ 530 DEG C with the speed of 1 ~ 3 DEG C/min, keep 0.5 ~ 1.5h, finally temperature is risen to 1200 ~ 1300 DEG C with the speed of 3 ~ 6 DEG C/min, lower the temperature after keeping 2 ~ 4h.
8. method according to claim 1, is characterized in that, the center loose mail described in S2. passes through rivet through built-up jig.
9. method according to claim 1, is characterized in that, in S2. on the center loose mail prepared by CNC locating and machining hole.
10. method according to claim 1, is characterized in that, by CNC finishing size and profile in S3..
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| CN107321990A (en) * | 2017-06-28 | 2017-11-07 | 成都岷江精密刀具有限公司 | A kind of hard metal article and preparation method thereof and the device for preparing hard metal article |
| CN108927516A (en) * | 2018-07-18 | 2018-12-04 | 东莞华晶粉末冶金有限公司 | Powder metallurgy mobile phone center sintering process |
| CN108941571A (en) * | 2018-06-21 | 2018-12-07 | 东莞市依诺电子科技有限公司 | A kind of method of powder injection-molded production hollow structure |
| CN111016058A (en) * | 2019-11-19 | 2020-04-17 | 东莞长盈精密技术有限公司 | Middle frame proofing method |
| US10652372B2 (en) | 2016-10-18 | 2020-05-12 | Huawei Technologies Co., Ltd. | Middle frame for mobile terminal and mobile terminal |
| WO2023142730A1 (en) * | 2022-01-30 | 2023-08-03 | 荣耀终端有限公司 | Middle frame, middle frame machining method and electronic device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106078111A (en) * | 2016-07-14 | 2016-11-09 | 昆山科森科技股份有限公司 | A kind of processing method of charging inlet support |
| CN106131255A (en) * | 2016-08-16 | 2016-11-16 | 东莞劲胜精密组件股份有限公司 | A kind of rustless steel carbon fibre composite mobile phone framework and preparation method thereof |
| US10652372B2 (en) | 2016-10-18 | 2020-05-12 | Huawei Technologies Co., Ltd. | Middle frame for mobile terminal and mobile terminal |
| CN107321990A (en) * | 2017-06-28 | 2017-11-07 | 成都岷江精密刀具有限公司 | A kind of hard metal article and preparation method thereof and the device for preparing hard metal article |
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| CN108927516A (en) * | 2018-07-18 | 2018-12-04 | 东莞华晶粉末冶金有限公司 | Powder metallurgy mobile phone center sintering process |
| CN111016058A (en) * | 2019-11-19 | 2020-04-17 | 东莞长盈精密技术有限公司 | Middle frame proofing method |
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| WO2023142730A1 (en) * | 2022-01-30 | 2023-08-03 | 荣耀终端有限公司 | Middle frame, middle frame machining method and electronic device |
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