CN109530702B - Amorphous alloy mobile phone middle frame forming device and forming method thereof - Google Patents
Amorphous alloy mobile phone middle frame forming device and forming method thereof Download PDFInfo
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- CN109530702B CN109530702B CN201811365300.4A CN201811365300A CN109530702B CN 109530702 B CN109530702 B CN 109530702B CN 201811365300 A CN201811365300 A CN 201811365300A CN 109530702 B CN109530702 B CN 109530702B
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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
- B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
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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
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Abstract
The invention relates to a device and a method for forming a middle frame of an amorphous alloy mobile phone, wherein the device comprises a case, a cylinder, a feeding mechanism and a forming mechanism, wherein the cylinder is arranged at the top of the case, and the feeding mechanism is positioned in the case and driven to lift by the cylinder; and a spray casting connector connected with a spray casting pressure system is arranged on one side of the case, a vacuum connector connected with a vacuum system is arranged on the other side of the case, and the forming mechanism is mounted in the case in a height-adjustable manner and is positioned at the bottom of the feeding mechanism. The invention has the advantages that: the amorphous alloy mobile phone middle frame product with stable quality can be formed, the operation is simple, and the equipment cost is relatively low; the method is realized by adopting a copper mold spray casting method for large-size amorphous products, and the industrial progress is promoted.
Description
Technical Field
The invention relates to a device and a method for forming an amorphous alloy mobile phone middle frame, which are suitable for the field of forming amorphous alloy large-size products.
Background
In the coming era of the 5G era, the traditional metal mobile phone shell is gradually replaced by materials such as ceramics, glass and plastic composite materials which have no influence on the signal of the mobile phone antenna due to the problem of signal shielding. One current trend in the industry is: the glass + metal mobile phone middle frame + (ceramic, glass and plastic) has the structure, and the traditional aluminum alloy middle frame and stainless steel middle frame have the defects of low strength, easiness in abrasion, non-corrosion resistance and the like.
The amorphous alloy has the performances of high strength, high hardness, good toughness, wear resistance, corrosion resistance and the like, and is one of novel metal materials which are rapidly developed in recent years. Therefore, the application of the 3C product is more and more extensive. The amorphous alloy is used for manufacturing the mobile phone middle frame, so that the mobile phone middle frame has the advantages of high strength (more than 1800MPa), ultrahigh hardness (more than HV 600), scratch resistance and more excellent corrosion resistance (more than 5 magnitude levels higher than that of the traditional steel), and can well replace the traditional aluminum alloy and stainless steel materials.
The amorphous alloy is obtained by cooling the alloy solution to the glass transition temperature of the amorphous phase at an extremely fast cooling rate (cooling rate is generally > 102-. The traditional copper mold spray casting method is adopted, amorphous alloy is filled in a crucible, heated and melted by electromagnetic induction under the environment of vacuum pumping or protective gas flushing, and then quickly spray-cast into a copper mold cavity for quick cooling to obtain an amorphous alloy product. The advantages are simple equipment and operation, and low cost. An important factor for amorphous alloy formation is cooling to the amorphous phase in a very short time; for the injection molding of the mold, the material is required to have sufficient flowing filling property in the filling process to ensure that the product is filled in the whole cavity (the material is required to be in a molten state as much as possible, the material is required to be in a high temperature in the filling process as much as possible, and the temperature is reduced slowly); there is a conflict between the two. The traditional copper mold spray casting has good forming capability for small-volume or small-size products, but has poor forming capability for large-size products (such as mobile phone middle frames), and has the following defects at present: 1. the filling is not full; air holes or blisters are easily formed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a device and a method for forming an amorphous alloy mobile phone middle frame, and the technical scheme of the invention is as follows:
a forming device for a middle frame of an amorphous alloy mobile phone comprises a case, a cylinder, a feeding mechanism and a forming mechanism, wherein the cylinder is installed at the top of the case, and the feeding mechanism is located in the case and driven to lift through the cylinder; and a spray casting connector connected with a spray casting pressure system is arranged on one side of the case, a vacuum connector connected with a vacuum system is arranged on the other side of the case, and the forming mechanism is mounted in the case in a height-adjustable manner and is positioned at the bottom of the feeding mechanism.
The feeding mechanism comprises a crucible mounting rack, quartz crucibles, crucible clamps, induction coils and a heating power supply, wherein the crucible mounting rack is installed on a piston rod of the air cylinder, four crucible clamps are uniformly installed along the circumferential direction of the crucible mounting rack through screws, a quartz crucible is installed in each crucible clamp, the induction coils are wound on the outer wall of the quartz crucible close to the discharge port of each quartz crucible, and the heating power supply is provided with a connector connected with the induction coils; each quartz crucible is communicated with the spray casting connecting port through a connecting hose.
A first high-temperature sealing ring and a second high-temperature sealing ring are arranged in front of the crucible clamp and the quartz crucible, and the second high-temperature sealing ring is positioned at the lower part of the first high-temperature sealing ring.
The forming mechanism comprises an upper die, a lower die and a base, one end of an adjusting screw rod penetrates into the case and then is connected with the base, the adjusting screw rod is perpendicular to the base, and the height of the base is adjusted through the adjusting screw rod; the base on install mould and lower mould in proper order last mould on install demoulding mechanism, the feed inlet that sets up with quartz crucible discharge gate one-to-one should go up the up end of mould, last mould and lower mould butt joint department form the exhaust duct and with the center die cavity of four feed inlets intercommunications, the outer port of exhaust duct communicate with each other with quick-witted incasement portion vacuum environment, interior port and center die cavity intercommunication.
And a layer of high-temperature-resistant ceramic fiber cloth is paved at each feed inlet, and a high-temperature-resistant sealing ring is arranged between the high-temperature-resistant ceramic fiber cloth and the upper die.
The four demolding mechanisms are uniformly arranged along the periphery of the upper mold, each demolding mechanism comprises a demolding sliding block, a demolding spring and a guide rod, a groove for accommodating the demolding sliding block is formed in the upper mold, the demolding sliding block is slidably arranged in the groove, the lower part of the demolding sliding block is supported by the lower mold, and the demolding sliding block is guided by the guide rod arranged on the upper mold; the demoulding spring is sleeved on the guide rod, one end of the demoulding spring is propped against the demoulding sliding block, the other end of the demoulding spring is propped against the upper template, each demoulding sliding block corresponds to a locking screw, and the locking screw is movably matched with the demoulding sliding block after penetrating through the outer wall of the upper template.
A method for forming an amorphous alloy mobile phone middle frame comprises the following steps:
s1, dividing the raw material into four parts, and respectively filling the four parts into four quartz crucibles;
s2, placing the upper die and the lower die on the base, aligning the discharge port of the quartz crucible with the feed port of the upper die, adjusting the height through the adjusting screw rod, starting the cylinder, descending the cylinder, ensuring that the discharge port of the quartz crucible is aligned with the feed port and sealed, and then ascending the cylinder;
s3, starting a vacuumizing program to vacuumize until the vacuum value reaches 10-4When the pressure is MPa, starting a heating power supply, electrifying the induction coil to heat the raw material, wherein the heating power is 30-40KW, and the frequency is 50-100 Hz;
s4, starting a spray casting system to carry out spray casting after the raw material reaches the required temperature, and carrying out four-point simultaneous spray casting; the spray casting pressure is 0.5-0.8MPa, the gas is argon, the spray casting time is 1-2s, and after the spray casting is finished, the heating power supply is turned off and the vacuum pumping system is turned off;
s5, opening a sealing valve on the case to introduce air into the case, opening a door of the case after the internal pressure and the external pressure are consistent, and moving out the upper die and the lower die;
s6, loosening the locking screw of the upper die to enable the demoulding slide block to be demoulded under the action of the demoulding spring, and taking out the product after the upper die is taken down.
The invention has the advantages that: the amorphous alloy mobile phone middle frame product with stable quality can be formed, the operation is simple, and the equipment cost is relatively low; the method is realized by adopting a copper mold spray casting method for large-size amorphous products, and the industrial progress is promoted.
Simultaneously: 1. adopting a four-point simultaneous spray casting process: because the forming factor of the amorphous alloy and the mold forming filling factor are contradictory processes, four points (four crucibles) are adopted for spray casting simultaneously on the premise of ensuring the amorphous characteristic, the feeding amount is improved, and the spray casting mold filling time is reduced.
2. The novel die structure is adopted, the flow path of the solution in the die cavity during spray casting is reduced, the mold filling capacity is improved, and four-point simultaneous direct feeding is adopted.
3. Adopts a simultaneous spray casting-suction casting process: in the process of spray casting, protective gas (argon) is filled in the crucible to form positive pressure, meanwhile, the mold is in a vacuum negative pressure environment, when the crucible descends to the feed inlet and is sealed through ceramic fiber cloth (heat insulation) and a high-temperature sealing ring (seal), the states of crucible internal pressure and mold exhaust port suction are formed during spray casting, the mold filling capacity can be improved, and air holes and sand hole defects are eliminated.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention.
Fig. 2 is a sectional view of fig. 1.
Fig. 3 is a schematic structural view of the mold-releasing mechanism in fig. 1.
Fig. 4 is a sectional view of fig. 3.
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Referring to fig. 1 to 4, the invention relates to an amorphous alloy mobile phone middle frame forming device, which comprises a case 1, a cylinder 2, a feeding mechanism 3 and a forming mechanism 6, wherein the cylinder 2 is installed at the top of the case 1, and the feeding mechanism 3 is positioned in the case 1 and driven to lift through the cylinder 2; an injection molding connecting port 4 connected with an injection molding pressure system is arranged on one side of the case 1, a vacuum connecting port 7 connected with a vacuum system is arranged on the other side of the case 1, and the forming mechanism 6 is installed in the case 1 in a height-adjustable mode and is located at the bottom of the feeding mechanism 3.
The feeding mechanism comprises a crucible mounting frame 31, quartz crucibles 32, crucible clamps 35, induction coils 5 and a heating power supply, wherein the crucible mounting frame 31 is mounted on a piston rod of the cylinder 2, four crucible clamps 35 are uniformly mounted along the circumferential direction of the crucible mounting frame 31 through screws, a quartz crucible 32 is mounted in each crucible clamp 35, the induction coils 5 are wound on the outer wall of each quartz crucible 32 close to the discharge port of each quartz crucible (the four quartz crucibles are wound through one induction coil), and the heating power supply is provided with a connector connected with the induction coils 5; each quartz crucible 32 is communicated with the injection-casting connection port through a connection hose.
A first high-temperature sealing ring 33 and a second high-temperature sealing ring 34 are arranged in front of the crucible clamp and the quartz crucible, and the second high-temperature sealing ring is positioned at the lower part of the first high-temperature sealing ring.
The forming mechanism comprises an upper die 61, a lower die 62 and a base 67, one end of an adjusting screw 68 penetrates into the case 1 and then is connected with the base 67, the adjusting screw 68 is perpendicular to the base 67, and the base 67 is adjusted in height through the adjusting screw 68; the base on install mould 61 and lower mould 62 in proper order last mould 61 on install demoulding mechanism, should go up the up end of mould 61 and offer the feed inlet 63 with quartz crucible discharge gate one-to-one, last mould 61 and lower mould 62 butt joint department form the exhaust duct and with the center die cavity of four feed inlets intercommunications, the outer port of exhaust duct communicate with each other with quick-witted incasement portion vacuum environment, interior port and center die cavity intercommunication, the exhaust duct is used for center die cavity and last mould and the external environment's of lower mould to be connected, keeps inside and outside pressure unanimous, the exhaust duct communicate with each other with quick-witted incasement portion vacuum environment, exhaust duct and center die cavity intercommunication.
A layer of high temperature resistant ceramic fiber cloth 64 is laid at each feed inlet, and a high temperature resistant sealing ring 65 is arranged between the high temperature resistant ceramic fiber cloth and the upper die.
The four demolding mechanisms are uniformly arranged along the periphery of the upper mold, each demolding mechanism comprises a demolding sliding block 69, a demolding spring 9 and a guide rod 8, a groove for accommodating the demolding sliding block 69 is formed in the upper mold 61, the demolding sliding block is slidably arranged in the groove, the lower portion of the demolding sliding block is supported by the lower mold 62, and meanwhile, the demolding sliding block is guided by the guide rod 8 arranged on the upper mold; the demoulding spring 9 is sleeved on the guide rod, one end of the demoulding spring is propped against the demoulding slide block 69, the other end of the demoulding spring is propped against the upper template 61, each demoulding slide block 69 corresponds to a locking screw 66, and the locking screw 66 is movably matched with the demoulding slide block 69 after penetrating through the outer wall of the upper die.
The invention also relates to a method for forming the amorphous alloy mobile phone middle frame, which comprises the following steps:
s1, dividing the raw material into four parts, and respectively filling the four parts into four quartz crucibles;
s2, placing the upper die and the lower die on the base, aligning the discharge port of the quartz crucible with the feed port of the upper die, adjusting the height through the adjusting screw rod, starting the cylinder, descending the cylinder, ensuring that the discharge port of the quartz crucible is aligned with the feed port and sealed, and then ascending the cylinder;
s3, starting a vacuumizing program to vacuumize until the vacuum value reaches 10-4When the pressure is MPa, starting a heating power supply, electrifying the induction coil to heat the raw material, wherein the heating power is 30-40KW, and the frequency is 50-100 Hz;
s4, starting a spray casting system to carry out spray casting after the raw material reaches the required temperature, and carrying out four-point simultaneous spray casting; the spray casting pressure is 0.5-0.8MPa, the gas is argon, the spray casting time is 1-2s, and after the spray casting is finished, the heating power supply is turned off and the vacuum pumping system is turned off;
s5, opening a sealing valve on the case to introduce air into the case, opening a door of the case after the internal pressure and the external pressure are consistent, and moving out the upper die and the lower die;
s6, loosening the locking screw of the upper die to enable the demoulding slide block to be demoulded under the action of the demoulding spring, and taking out the product after the upper die is taken down.
Example 1:
and (3) spray-casting a zirconium-based amorphous alloy mobile phone middle frame with the length, width, height and wall thickness of 2mm, wherein the length, width and height of the zirconium-based amorphous alloy mobile phone middle frame are 142 x 67 x 7mm according to the operation steps. Processing parameters are as follows: vacuum value of 10-4MPa, heating power of 30KW, current frequency of 100Hz, spray casting pressure of 0.6MPa (argon) and spray casting time of 1.5 s. The yield of the product obtained by the process of the embodiment is 99%.
Example 2:
and (3) spray-casting the zirconium-based amorphous alloy mobile phone middle frame with the length, width, height and wall thickness of 100pcs and the length, width and height of 140 x 65 x 6mm according to the operation steps. Processing parameters are as follows: vacuum value of 10-4MPa, heating power of 40KW, current frequency of 50Hz, spray casting pressure of 0.5MPa (argon) and spray casting time of 2 s.
The yield of the product obtained by the process of the embodiment is 97%.
Example 3:
and (3) spray-casting a zirconium-based amorphous alloy mobile phone middle frame with the length, width, height and thickness of 100pcs, 144 x 68 x 6.5mm and 1.8mm according to the operation steps. Processing parameters are as follows: vacuum value of 10-4MPa, heating power of 35KW, current frequency of 70Hz, spray casting pressure of 0.8MPa (argon), and spray casting time of 1 s. The yield of the product obtained by the process of the embodiment is 98 percent.
Claims (5)
1. The amorphous alloy mobile phone middle frame forming device is characterized by comprising a case, a cylinder, a feeding mechanism and a forming mechanism, wherein the cylinder is installed at the top of the case, and the feeding mechanism is located in the case and driven to lift through the cylinder; a spray casting connecting port connected with a spray casting pressure system is arranged on one side of the case, a vacuum connecting port connected with a vacuum system is arranged on the other side of the case, and the forming mechanism is mounted in the case in a height-adjustable manner and is positioned at the bottom of the feeding mechanism;
the forming mechanism comprises an upper die, a lower die and a base, one end of an adjusting screw rod penetrates into the case and then is connected with the base, the adjusting screw rod is perpendicular to the base, and the height of the base is adjusted through the adjusting screw rod; an upper die and a lower die are sequentially arranged on the base, a demoulding mechanism is arranged on the upper die, the upper end surface of the upper die is provided with feed inlets which are in one-to-one correspondence with the discharge outlets of the quartz crucible, an exhaust groove and a middle frame cavity communicated with the four feed inlets are formed at the butt joint of the upper die and the lower die, the outer port of the exhaust groove is communicated with the vacuum environment in the case, and the inner port is communicated with the middle frame cavity;
the four demolding mechanisms are uniformly arranged along the periphery of the upper mold, each demolding mechanism comprises a demolding sliding block, a demolding spring and a guide rod, a groove for accommodating the demolding sliding block is formed in the upper mold, the demolding sliding block is slidably arranged in the groove, the lower part of the demolding sliding block is supported by the lower mold, and the demolding sliding block is guided by the guide rod arranged on the upper mold; the demoulding spring is sleeved on the guide rod, one end of the demoulding spring is propped against the demoulding sliding block, the other end of the demoulding spring is propped against the upper template, each demoulding sliding block corresponds to a locking screw, and the locking screw is movably matched with the demoulding sliding block after penetrating through the outer wall of the upper template.
2. The forming device of the amorphous alloy mobile phone middle frame according to claim 1, wherein the feeding mechanism comprises a crucible mounting rack, a quartz crucible, crucible clamps, an induction coil and a heating power supply, the crucible mounting rack is mounted on a piston rod of the cylinder, four crucible clamps are uniformly mounted along the circumferential direction of the crucible mounting rack through screws, a quartz crucible is mounted in each crucible clamp, the induction coil is wound on the outer wall of the quartz crucible close to the discharge port of each quartz crucible, and the heating power supply is provided with a connector connected with the induction coil; each quartz crucible is communicated with the spray casting connecting port through a connecting hose.
3. The device as claimed in claim 2, wherein a first high temperature sealing ring and a second high temperature sealing ring are installed in front of the crucible holder and the quartz crucible, and the second high temperature sealing ring is located below the first high temperature sealing ring.
4. The forming device of the amorphous alloy mobile phone middle frame as claimed in claim 1, wherein a layer of high temperature resistant ceramic fiber cloth is laid at each feed inlet, and a high temperature resistant sealing ring is installed between the high temperature resistant ceramic fiber cloth and the upper die.
5. A forming method based on the forming device of the middle frame of the amorphous alloy mobile phone of any one of claims 1 to 4 is characterized by comprising the following steps:
s1, dividing the raw material into four parts, and respectively filling the four parts into four quartz crucibles;
s2, placing the upper die and the lower die on the base, aligning the discharge port of the quartz crucible with the feed port of the upper die, adjusting the height through the adjusting screw rod, starting the cylinder, descending the cylinder, ensuring that the discharge port of the quartz crucible is aligned with the feed port and sealed, and then ascending the cylinder;
s3, starting a vacuumizing program to vacuumize until the vacuum value reaches 10-4When the pressure is MPa, starting a heating power supply, electrifying the induction coil to heat the raw material, wherein the heating power is 30-40KW, and the frequency is 50-100 Hz;
s4, starting a spray casting system to carry out spray casting after the raw material reaches the required temperature, and carrying out four-point simultaneous spray casting; the spray casting pressure is 0.5-0.8MPa, the gas is argon, the spray casting time is 1-2s, and after the spray casting is finished, the heating power supply is turned off and the vacuum pumping system is turned off;
s5, opening a sealing valve on the case to introduce air into the case, opening a door of the case after the internal pressure and the external pressure are consistent, and moving out the upper die and the lower die;
s6, loosening the locking screw of the upper die to enable the demoulding slide block to be demoulded under the action of the demoulding spring, and taking out the product after the upper die is taken down.
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| CN201811365300.4A CN109530702B (en) | 2018-11-16 | 2018-11-16 | Amorphous alloy mobile phone middle frame forming device and forming method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5711363A (en) * | 1996-02-16 | 1998-01-27 | Amorphous Technologies International | Die casting of bulk-solidifying amorphous alloys |
| CN1123647C (en) * | 2001-10-19 | 2003-10-08 | 北京科技大学 | Method and equipment of preparing massive great-specific weight Zr-W-base amorphous alloy |
| KR100572583B1 (en) * | 2003-10-15 | 2006-04-24 | 고동근 | Goods making process and device of vertical vacuum squeeze casting machine |
| CN1274444C (en) * | 2003-11-07 | 2006-09-13 | 安泰科技股份有限公司 | Jetting casting process for preparing block amorphous and apparatus therefor |
| CN101293277B (en) * | 2008-06-13 | 2010-06-02 | 清华大学 | Pressure difference injection moulding method and equipment for amorphous magnesium alloy |
| CN203109208U (en) * | 2013-03-12 | 2013-08-07 | 苏州广型模具有限公司 | Stripping mechanism of die-casting mould |
| CN203578719U (en) * | 2013-11-30 | 2014-05-07 | 中国科学院金属研究所 | Amorphous alloy element casting forming equipment |
| CN104668503B (en) * | 2013-11-30 | 2017-05-31 | 中国科学院金属研究所 | A kind of non-crystaline amorphous metal component casting equipment and technique |
| CN105344964A (en) * | 2015-11-17 | 2016-02-24 | 刘南林 | Manufacturing technology and device for shell of amorphous alloy watch |
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Effective date of registration: 20210115 Address after: No. 3000, Taidong Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province Applicant after: SUZHOU TAIKAN MACHINERY Co.,Ltd. Address before: 523000 corner village, Changan Town, Dongguan, Guangdong Applicant before: GUANGDONG JANUS INTELLIGENT GROUP Corp.,Ltd. |