CN104907521A - Mobile phone middle frame manufacturing process - Google Patents

Mobile phone middle frame manufacturing process Download PDF

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Publication number
CN104907521A
CN104907521A CN201510155845.2A CN201510155845A CN104907521A CN 104907521 A CN104907521 A CN 104907521A CN 201510155845 A CN201510155845 A CN 201510155845A CN 104907521 A CN104907521 A CN 104907521A
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China
Prior art keywords
frame
metal
mobile phone
die
positioning sliding
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CN201510155845.2A
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CN104907521B (en
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卫凡
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Dongguan Changying Precision Technology Co. Ltd.
Guangdong Evenwin Precision Technology Co Ltd
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Shenzhen Everwin Precision Technology Co Ltd
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Abstract

The invention provides a mobile phone middle frame manufacturing process. The manufacturing process comprises the steps that 1 a metal outer frame is provided; 2 the dilation dimension of the metal outer frame after heating is conducted is measured, and a positioning slide block of a die is designed according to the dilation dimension; 3 the outer frame is heated and placed into a cavity of the die to conduct die assembly; 4 metal solutions are poured into the cavity of the die; 5 cooling and die-opening are conducted and a die casting body is formed in the inner side face of the outer frame. The mobile phone middle frame manufacturing process can effectively solve a deformation problem of the metal outer frame due to heating expansion.

Description

Mobile phone center manufacturing process
Technical field
The present invention relates to metal processing sectors, espespecially a kind of mobile phone center manufacturing process.
Background technology
Current, Smartphone device, particularly high-end smartphones, all adopt metal center, bonnet to cater to the demand of consumer to metal-like, but there is following problem in the manufacture of metal center, if adopt forging to manufacture in the technique of CNC processing overall, then manufacturing cost is too high, and common customer is difficult to accept.And the overall mode of die casting that adopts is produced, then the outer surface density of mobile phone center finished product is inadequate, and has loose husky hole, and outward appearance is difficult to be accepted.
The People's Republic of China's No. 201110141704.7 manufacturing process that patent application discloses a kind of forging, die casting combines, namely first pass through the housing of forging or the shaping center of other modes and then the internal structure by passing through the shaping center of mode of die casting in described housing inside, the contradiction between manufacturing cost and outward appearance can be solved.But by the housing of forging molding insert in mould carry out die-casting process time, need to heat to ensure between die-casting body and housing, there is good adhesion to described housing, but the housing of described heating can produce thermal expansion, and the design of die size is general according to the housing size design without heating, cause the thermal expansion of described housing in mould, there is no rational Free up Memory and be out of shape, affect product quality.Simultaneously, this patent also adopts and improves adhesion between die-casting body in the method for the inner side of described housing processing recess or welding mold insert, but the difficulty of processing of recess is larger inside housing, and the welding method of mold insert unreliable, there is welding procedure complexity, fraction defective is high and may the problems such as outward appearance be affected.
Accompanying drawing explanation
Fig. 1 is stereogram and the partial enlarged drawing thereof of the outside framework of mobile phone center of the present invention;
Fig. 2 is stereogram after die-casting process of the outside framework of the real mobile phone center of the present invention and partial sectional view thereof;
Fig. 3 is the stereogram of mobile phone center manufacturing process die casting of the present invention;
Fig. 4 is that the outside framework of mobile phone center in the present invention's real mobile phone center manufacturing process is placed in the structure chart and partial enlarged drawing thereof that carry out die-casting process in die cavity;
Fig. 5 is the schematic perspective view that the outside framework of positioning sliding block to described mobile phone center of the die casting of mobile phone center manufacturing process of the present invention positions;
Fig. 6 for outside framework after heating along the sectional view of the dotted line of A-A shown in Fig. 5;
Fig. 7 for outside framework without under heated condition along the sectional view of the dotted line of A-A shown in Fig. 5;
Fig. 8 is the die-cast metal solution flow graph of mobile phone center manufacturing process of the present invention;
Fig. 9 is for along the sectional view of the dotted line of B-B shown in Fig. 8 and partial enlarged drawing thereof.
Summary of the invention
The object of the present invention is to provide a kind of processing cost low and effectively can solve the mobile phone center manufacturing process of outside framework thermal expansion problem in die-casting process.
For this reason, the invention provides a kind of mobile phone center manufacturing process, comprising:
Step one, provide metal outer frame frame;
Step 2, test the dilation dimension after the heating of described metal outer frame frame, and design the positioning sliding block of described mould according to described dilation dimension;
Step 3, heat the die cavity matched moulds that described outside framework puts into described mould;
Step 4, injection metallic solution enter the die cavity of described mould;
Step 5, cooling die sinking form die-casting body between the medial surface of described outside framework.
Compared to prior art, mobile phone center manufacturing process of the present invention is when Design of Dies, change in size after described outside framework heating is verified, being designed the size of described positioning sliding block according to the outside framework that calculates by the accurate dimension after heating, solving outside framework described in prior art because adding after thermal expansion by the problem of described positioning sliding block crimp.
Detailed description of the invention
Refer to the outside framework 10 that needing shown in Fig. 1, Fig. 2 carries out the mobile phone center of die-casting process, described outside framework 10 is by forging or the technological forming such as extruding, and processes through CNC.Described outside framework 10 is not got rid of yet and is formed by other processes.
Described outside framework 10, roughly in rectangular closed structure, comprises lateral surface 11 medial surface relative with lateral surface 11 12, upper and lower side 13 between medial surface 12 and lateral surface 11.The medial surface 12 of described outside framework 10 is inwardly processed to form protuberance 14, described protuberance 12 includes thinner protuberance 141 and thicker protuberance 143, the thickness of described thinner, thicker protuberance 141,143 is all less than the thickness of described outside framework 10 itself.Described thinner protuberance 141 has been processed to form through hole 142, and described through hole 142 is towards interior side opening, and the centre of described thicker protuberance 143 is processed to form channel-shaped structure 144, and described channel-shaped structure 144 is processed to form through hole 145 at above-below direction.
Described outside framework 10 forms die-casting body 20 at the medial surface 12 of described outside framework 10 after die cast, and described die-casting body 20 keeps integrative-structure with described outside framework 10.In press casting procedure, channel-shaped structure 144 in the through hole 142 that metal liquid enters the interior side opening of the thinner protuberance 141 of the medial surface 12 of described outside framework 10 and on thicker protuberance 143 and be positioned at the through hole 145 of channel-shaped structure 144 above-below direction, forms die-casting body 20 after cooling.So, the part die-casting body 20 in the through hole 142 of described interior side opening forms unitary physical structure by described interior side opening and die-casting body 20, strengthens the adhesion of described die-casting body 20 and outside framework 10.Simultaneously, the part die-casting body 20 of filling in described channel-shaped structure 143 forms described die-casting body 20 part of the whole with the part die-casting body 20 in the through hole 145 of described channel-shaped structure 143 above-below direction, further keeps the associativity of described die-casting body 20 and outside framework 10 at upper and lower, left and right directions.
Refer to Fig. 3, Figure 4 shows that mould for carrying out die-casting process to described outside framework 10, described mould comprises upper cores 31, lower die 32, die cavity 35, charging aperture 33 and some positioning sliding blocks 34 between upper cores 31 and lower die 32.Described positioning sliding block 34 is for locating described outside framework 10 by the lateral surface 11 of described outside framework 10, and described positioning sliding block 34 comprises four and locates described outside framework 10 from four sides of described outside framework 10.
Refer to shown in Fig. 6, Fig. 8, Fig. 9, two at least relative positioning sliding blocks 34 are extending to form the extension 341 on the upper side 13 being covered in described outside framework 10 near described outside framework 10 side, the Inner edge of described extension 341 is provided with rake 342, and the bottom outer-edge of described rake 342 is concordant with the medial surface 12 of described outside framework 10.One of being provided with in two positioning sliding blocks 34 of extension 341 is connected with described charging aperture 33, another is provided with exhaust outlet, in press casting procedure, the extension 341 be covered on the upper side 13 of outside framework 10 along described positioning sliding block 34 after described metallic solution enters along charging aperture 33 flows and enters in the die cavity 35 between the medial surface 12 of described outside framework 10, after described metallic solution enters, gas in runner and die cavity 35 is discharged by the exhaust outlet above another positioning sliding block 34, filled by metallic solution after described exhaust outlet vent gas, die-casting body 20 is formed after cooling in described die cavity 35.
Because described metallic solution temperature reaches 700 DEG C, and the temperature after described outside framework 10 heating is about 220 DEG C, if described metallic solution directly flows through the upper side 13 of described outside framework 10, the upper side 13 of described outside framework 10 then can be caused to be out of shape and to affect product plane degree, described positioning sliding block 34 arrange be covered in described outside framework 10 upper side 13 on extension 341 for metallic solution by between the rear medial surface 12 directly entering described outside framework 10, efficiently solve flatness problems with respect.And the design of rake 342 on described extension 341 can contribute to effective mobility of metallic solution.
Refer to shown in Fig. 1 to Fig. 9, the application's mobile phone center manufacturing process comprises following manufacturing process flow:
Step one, emphasis are consulted shown in Fig. 1, Fig. 2, provide metal outer frame frame 10, and described metal outer frame frame 10 is by forging or the technological forming such as extruding, and processes through CNC.
Step 2, heat according to described outside framework 10 after the size of thermal coefficient of expansion designing mould positioning sliding block 34;
This step emphasis refers to shown in Fig. 5 to Fig. 7, the size of described mould positioning sliding block 34 generally designs according to the outside framework 10 under described normality, so after described outside framework 10 is added thermal expansion, cause described positioning sliding block 34 to be out of shape the extruding of described outside framework 10, need to revise the positioning sliding block 34 of described mould.This step needs first to carry out heating for multiple times test to described outside framework 10, verify the change in size of described outside framework 10 after heating, what after repeatedly testing, draw described outside framework 10 adds thermal coefficient of expansion, determine the size of the average minimal error of the outside framework 10 after repeatedly testing heating, according to the size of the positioning sliding block 34 of mould described in outside framework 10 size design after described heating.Described repeatedly test also can be once some outside frameworks 10 are carried out heating operation, measures the dilation dimension after the heating of each outside framework 10 respectively.As shown in Figure 6, when the outside framework 10 after heating is located by described positioning sliding block 34 in normal state, it should be the lateral surface 11 that the medial surface of described positioning sliding block 34 is close to described outside framework 10.Again as shown in Figure 7, without the outside framework 10 heated in normal state, between the medial surface of described positioning sliding block 34 and the lateral surface 11 of described outside framework 10, there is a gap h.After described heating, the change of size can be undertaken measuring to promote precision by laser surveying instrument.
Step 3, heat described outside framework 10 and put into the die cavity 35 of described mould and matched moulds;
In this step, described outside framework 10 is heated between 210 DEG C-230 DEG C, and described mold temperature also remains between 210 DEG C-230 DEG C.The heating process of described outside framework 10 can be selected to carry out before putting into mold cavity 35, so, can improve working (machining) efficiency; Also can put into described mold cavity 35 and heat described, but program efficiency is lower.
Step 4, described metallic solution is injected in described mold cavity 35;
Described metallic solution is aluminium alloy solution, the temperature of described metallic solution is at about 700 DEG C, empirical tests, described metal outer frame frame 10 temperature 220 DEG C time and the metallic solution of described 700 DEG C have optimum surface binding, outside framework 10 can be obtained and be combined product the most closely with described die-casting body 20 after described metallic solution cooling.
Emphasis is consulted shown in Fig. 3, Fig. 4, Fig. 8, Fig. 9, described metallic solution enters in the die cavity 35 of described mould from described charging aperture 33, described metallic solution directly enters between the medial surface 12 of described outside framework 10 via one of them runner be located at above the extension 341 of described positioning sliding block 34, and cast gate 37 is formed on the extension 341 of described positioning sliding block 34, the gas in described die cavity 35 is provided with the positioning sliding block 34 of exhaust outlet extension 341 via a top is discharged.Describedly be provided with runner, upper side 13 that the extension 341 of positioning sliding block 34 of exhaust outlet covers described outside framework 10, and two positioning sliding blocks 34 are positioned at two side both sides of described outside framework 10 relatively.
Step 5, cooling die sinking;
The die-casting body 20 be combined as a whole with described outside framework 10 is formed after described metallic solution cools in the die cavity 35 of described mould.
The application's mobile phone center manufacturing process is when Design of Dies, change in size after described outside framework 10 heats is verified, being designed the size of described positioning sliding block 34 according to the outside framework 10 that calculates by the accurate dimension after heating, solving outside framework 10 described in prior art because adding after thermal expansion by the problem of described positioning sliding block 34 crimp.

Claims (10)

1. a mobile phone center manufacturing process, is characterized in that, comprising:
Step one, provide metal outer frame frame;
Step 2, test the dilation dimension after the heating of described metal outer frame frame, and design the positioning sliding block of described mould according to described dilation dimension;
Step 3, heat the die cavity matched moulds that described outside framework puts into described mould;
Step 4, injection metallic solution enter the die cavity of described mould;
Step 5, cooling die sinking form die-casting body between the medial surface of described outside framework.
2. mobile phone center manufacturing process as claimed in claim 1, it is characterized in that: described metal outer frame frame be by forging or extrusion process shaping, and process through CNC, the rectangular structure of described outside framework, described outside framework comprises lateral surface, medial surface and upper and lower side, and described medial surface is formed with some protuberances.
3. mobile phone center manufacturing process as claimed in claim 2, is characterized in that: described protuberance is provided with the through hole of some above-below directions, side opening in described through hole.
4. mobile phone center manufacturing process as claimed in claim 2, it is characterized in that: described protuberance is provided with channel-shaped structure, the above-below direction of described channel-shaped structure is provided with through hole.
5. the mobile phone center manufacturing process as described in any one of claim 1-4, is characterized in that: described step 2, test the dilation dimension after the heating of described metal outer frame frame, and designs the positioning sliding block of described mould according to described dilation dimension, comprising:
Some metal outer frame framves are heated to 220 DEG C;
Measure the size after the heating of all metal outer frame framves, and calculate mean value;
According to the metal outer frame frame size average designing mould positioning sliding block after described heating.
6. mobile phone center manufacturing process as claimed in claim 5, is characterized in that: when measuring the size after the heating of all metal outer frame framves, adds the metal outer frame frame after thermal expansion described in the measurement of employing laser measuring apparatus.
7. the mobile phone center manufacturing process as described in any one of claim 1-4, is characterized in that: described step 3, heat the die cavity matched moulds that described outside framework puts into described mould, comprising:
Be preheated between 210 DEG C-230 DEG C to described metal outer frame frame;
Metal outer frame frame after described preheating is put into described mould temperature and remain on mold cavity between 210 DEG C-230 DEG C;
The lateral surface that described positioning sliding block slides into described metal outer frame frame locates described metal outer frame frame.
8. the mobile phone center manufacturing process as described in any one of claim 1-4, it is characterized in that: at least two positioning sliding blocks are provided with the extension above the upper side being covered in described metal outer frame frame, the runner injecting described metallic solution is provided with above the extension of one of them positioning sliding block, the exhaust outlet for being vented is provided with above the extension of another positioning sliding block, in step 4, described metallic solution be runner above the extension of described positioning sliding block enter described metal outer frame frame medial surface between, gas in described die cavity is that the exhaust outlet above the described extension being located at positioning sliding block is discharged, the metallic solution avoiding temperature higher directly flows through the upper side that contacts described metal outer frame frame and causes upper side flatness bad.
9. mobile phone center manufacturing process as claimed in claim 8, is characterized in that: described top is respectively equipped with runner, the inner side of two positioning sliding blocks of exhaust outlet is provided with rake, and the bottom of described rake is concordant with the medial surface of described metal outer frame frame.
10. the mobile phone center manufacturing process as described in any one of claim 1-4, it is characterized in that: in step 5, after cooling die sinking, described metallic solution solidify to form die-casting body, forms a part for described die-casting body in the through hole that described metallic solution enters the interior side opening of the protuberance of the medial surface of described metal outer frame frame and in the channel-shaped structure of protuberance and the through hole of top thereof after cooling.
CN201510155845.2A 2015-04-02 2015-04-02 Mobile phone center manufacturing process Active CN104907521B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105312949A (en) * 2015-10-30 2016-02-10 广东长盈精密技术有限公司 Positioning device
CN106141586A (en) * 2016-07-22 2016-11-23 维沃移动通信有限公司 A kind of electronic equipment center processing method, electronic equipment center and electronic equipment
CN108832273A (en) * 2018-06-12 2018-11-16 Oppo广东移动通信有限公司 Center component, electronic device and center module processing method
CN108971894A (en) * 2018-06-21 2018-12-11 东莞市依诺电子科技有限公司 A kind of technique of die casting composite molding
CN109277755A (en) * 2018-11-29 2019-01-29 福建省石狮市通达电器有限公司 Die casting combined type aluminum mobile phone center

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090197116A1 (en) * 2008-02-01 2009-08-06 Fih (Hong Kong) Limited Metal housing
CN102811264A (en) * 2011-05-30 2012-12-05 李树忠 Mobile phone shell and machining method thereof
CN103640161A (en) * 2013-12-24 2014-03-19 北京东明兴业科技有限公司 Precise injection mould of large-frame super-narrow zinc alloy insert of cellphone front shell
CN203764938U (en) * 2014-03-07 2014-08-13 深圳市长盈精密技术股份有限公司 Magnesium alloy mobile phone middle frame die-casting mould
CN104015009A (en) * 2014-06-13 2014-09-03 广东长盈精密技术有限公司 Method for manufacturing middle frames and rear covers of mobile phones

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090197116A1 (en) * 2008-02-01 2009-08-06 Fih (Hong Kong) Limited Metal housing
CN102811264A (en) * 2011-05-30 2012-12-05 李树忠 Mobile phone shell and machining method thereof
CN103640161A (en) * 2013-12-24 2014-03-19 北京东明兴业科技有限公司 Precise injection mould of large-frame super-narrow zinc alloy insert of cellphone front shell
CN203764938U (en) * 2014-03-07 2014-08-13 深圳市长盈精密技术股份有限公司 Magnesium alloy mobile phone middle frame die-casting mould
CN104015009A (en) * 2014-06-13 2014-09-03 广东长盈精密技术有限公司 Method for manufacturing middle frames and rear covers of mobile phones

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105312949A (en) * 2015-10-30 2016-02-10 广东长盈精密技术有限公司 Positioning device
CN106141586A (en) * 2016-07-22 2016-11-23 维沃移动通信有限公司 A kind of electronic equipment center processing method, electronic equipment center and electronic equipment
CN108832273A (en) * 2018-06-12 2018-11-16 Oppo广东移动通信有限公司 Center component, electronic device and center module processing method
CN108971894A (en) * 2018-06-21 2018-12-11 东莞市依诺电子科技有限公司 A kind of technique of die casting composite molding
CN109277755A (en) * 2018-11-29 2019-01-29 福建省石狮市通达电器有限公司 Die casting combined type aluminum mobile phone center

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