CN102554226A - Powder metallurgy pressing mould base - Google Patents
Powder metallurgy pressing mould base Download PDFInfo
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- CN102554226A CN102554226A CN2012100468972A CN201210046897A CN102554226A CN 102554226 A CN102554226 A CN 102554226A CN 2012100468972 A CN2012100468972 A CN 2012100468972A CN 201210046897 A CN201210046897 A CN 201210046897A CN 102554226 A CN102554226 A CN 102554226A
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- mould bases
- seal closure
- powder metallurgy
- mould
- metallurgy pressing
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Abstract
The invention relates to a powder metallurgy pressing mould base, which comprises an upper mould plate, a female mould plate, an upper punch, a female mould and a lower punch. The powder metallurgy pressing mould base is characterized in that a device capable of vacuumizing a mould cavity in pressing is arranged on the mould base and comprises a sealing cover and a vacuum pump, the sealing cover in sliding fit with the upper punch is arranged outside the upper punch, an air guide channel connected with the vacuum pump is arranged on the lower end face of the sealing cover, and a pressing mechanism for tightly attaching the sealing cover to the upper end face of the female mould of the mould base is mounted on the sealing cover and leads the air guide channel to be communicated with the mould cavity. During pressing, the vacuum pump of the mould cavity vacuumizing device is used for vacuumizing the mould cavity through the air guide channel, air in powder inside the mould cavity is pumped out, internal or external defects of products due to air can be effectively prevented, and product pressing quality is improved.
Description
Technical field
The present invention relates to a kind of powder metallurgy pressing shaping mould bases, the powder metallurgy pressing shaping mould bases that particularly a kind of exhaust is thorough, pressing result can reduce product defects well.
Background technology
Powder metallurgy be produce metal or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through having press or shaping without pressure after again through sintering, make the technology of metal material, compound and all kinds goods.Form and machinery, physical property because PM technique has unique chemical, and these performances are can't obtain with traditional casting method.It has become the key that solves the new material problem, in the development of new material, plays a part very important.
The necessity of exhaust in the powder pressing technology: in the pulverulent product press forming,, then influence the pulverulent product quality that is shaped if untimely with the gas discharge.For example, the ceramic powders goods that intensity is lower are prone to directly occur significantly cracking, disconnected base phenomenon when compacting; There is the micro-crack that is difficult for discovering in the pulverulent product of moderate strength, and flows into next procedure, and loss further improves, and processing cost and cycle all increase; The higher pulverulent product of intensity is at the no obvious crackle of compacting, and when gases are heated, they expand in the powder during sintering, cracks.
The backhaul exhaust is all adopted in powder compaction exhaust at present, i.e. the descending compacting of upper punch, and up then backhaul exhaust, descending again compacting, up again backhaul exhaust realizes so repeatedly.The shortcoming of this kind method is: equipment vibrations, impact are greatly; And have the part air to be pressed in the powder again during descending once more compacting, exhaust is not thorough.
Summary of the invention
The technical problem that the present invention will solve provides the powder metallurgy pressing shaping mould bases that a kind of exhaust is thorough, pressing result can reduce product defects well.
For solving the problems of the technologies described above; Technical scheme of the present invention is: a kind of powder metallurgy pressing shaping mould bases; Comprise cope match-plate pattern, negative template, Shang Chong, former and the Xia Chong of mould bases, its innovative point is: said mould bases is provided with the device that can when compacting, vacuumize die cavity.
Further; Said die cavity vacuum extractor comprises seal closure and vavuum pump; Said going up towards being outside equipped with the seal closure that is slidingly matched with it; The lower surface of said seal closure is provided with the air guide channel that is connected with vavuum pump, is equipped with on the said seal closure when compacting seal closure is close to mould bases former upper surface and is made the hold-down mechanism that air guide channel is communicated with die cavity.
Further, said hold-down mechanism is the back-moving spring that is installed between mould bases cope match-plate pattern and the seal closure.
Further, said seal closure and on be provided with hermetically-sealed construction between dashing.
Further, be provided with hermetically-sealed construction between said seal closure and the former.
Further, said former and under be provided with hermetically-sealed construction between dashing.
The invention has the advantages that: in pressing process; The vavuum pump of die cavity vacuum extractor vacuumizes die cavity through air guide channel; Extract the air that contains in the die cavity powder out, can prevent effectively that product from because of air produces inherent or external defective, having improved the compacting quality of product.
Description of drawings
Fig. 1 is a powder metallurgy pressing shaping mould bases example structure sketch map of the present invention.
The specific embodiment
Of Fig. 1, mould bases comprises cope match-plate pattern 1, negative template 2, installs on the cope match-plate pattern 1 and dashes 3, and former 4 is installed on the negative template 2, installs on the fixed head down and dashes 5.
Also be provided with the device that can when compacting, vacuumize die cavity on the above-mentioned mould bases, it comprises seal closure and vavuum pump.Outside seal closure is located at and dashes, and be slidingly matched with last dash, the lower surface of seal closure has cannelure as air guide channel, and this air guide channel is communicated with vavuum pump.
Be equipped with on the seal closure when compacting seal closure is close to mould bases former upper surface and is made the hold-down mechanism that air guide channel is communicated with die cavity.In the present embodiment, this hold-down mechanism is back-moving spring 71 and the spring base 72 that is installed between mould bases cope match-plate pattern and the seal closure.
For raising vacuumizes effect, hermetically-sealed construction all is set in corresponding position.Seal closure and on be provided with hermetically-sealed construction between dashing; Concrete: seal closure is made up of with following rebound 62 bolts last rebound 61 in the present embodiment; External screw thread hollow stud 63 is threaded on last rebound 61; These hollow stud 63 lower ends prop up down rebound 62 upper surfaces, are provided with O-ring seals 81 between hollow stud 63 and the following rebound 62, and the inner ring of O-ring seals 81 is close to towards 3.Except O-ring seals 81, also can install pad 64, fluid sealant etc. additional and further improve sealing property.
Be provided with hermetically-sealed construction between the following rebound 62 of seal closure and the former 4, concrete: as O-ring seals 82 to be set in following rebound 62 lower surfaces.Former 4 and down dash 5 between be provided with hermetically-sealed construction, concrete, O-ring seals 83 is installed dashing down on 5.
Operation principle:
During compacting; Cope match-plate pattern 1 drives to go up and dashes 3 descendingly with seal closure, after the seal closure lower surface props up former 4 upper surfaces, upward dashes 3 and can continue descending the compacting; Seal closure and Shang Chong, former, following dashing constitute a hermetic cavity body, by vavuum pump the air in the die cavity are extracted out.
Claims (6)
1. powder metallurgy pressing shaping mould bases comprises cope match-plate pattern, negative template, Shang Chong, former and the Xia Chong of mould bases, and it is characterized in that: said mould bases is provided with the device that can when compacting, vacuumize die cavity.
2. powder metallurgy pressing shaping mould bases according to claim 1; It is characterized in that: said die cavity vacuum extractor comprises seal closure and vavuum pump; Said going up towards being outside equipped with the seal closure that is slidingly matched with it; The lower surface of said seal closure is provided with the air guide channel that is connected with vavuum pump, is equipped with on the said seal closure when compacting seal closure is close to mould bases former upper surface and is made the hold-down mechanism that air guide channel is communicated with die cavity.
3. the powder metallurgy pressing shaping mould bases of stating according to claim 2 is characterized in that: said hold-down mechanism is the back-moving spring that is installed between mould bases cope match-plate pattern and the seal closure.
4. powder metallurgy pressing shaping mould bases according to claim 2 is characterized in that: said seal closure and on be provided with hermetically-sealed construction between dashing.
5. powder metallurgy pressing shaping mould bases according to claim 2 is characterized in that: be provided with hermetically-sealed construction between said seal closure and the former.
6. powder metallurgy pressing shaping mould bases according to claim 2 is characterized in that: said former and under be provided with hermetically-sealed construction between dashing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210046897 CN102554226B (en) | 2012-02-28 | 2012-02-28 | Powder metallurgy pressing mould base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210046897 CN102554226B (en) | 2012-02-28 | 2012-02-28 | Powder metallurgy pressing mould base |
Publications (2)
| Publication Number | Publication Date |
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| CN102554226A true CN102554226A (en) | 2012-07-11 |
| CN102554226B CN102554226B (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210046897 Expired - Fee Related CN102554226B (en) | 2012-02-28 | 2012-02-28 | Powder metallurgy pressing mould base |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773477A (en) * | 2012-08-16 | 2012-11-14 | 俞红霞 | Vacuumizing forming device and method of magnetic field hydraulic machine |
| CN107866570A (en) * | 2017-12-15 | 2018-04-03 | 东北大学 | A kind of equipment for powder metallurgy warm pressing formation |
| CN113276466A (en) * | 2021-05-10 | 2021-08-20 | 盐城凯龙药业有限公司 | Cimetidine tablet tabletting process and tabletting equipment thereof |
| CN116944497A (en) * | 2023-09-18 | 2023-10-27 | 泰州市华诚钨钼制品有限公司 | Tungsten molybdenum alloy piece shaping pressing equipment |
| CN117655324A (en) * | 2024-01-29 | 2024-03-08 | 虞锋超硬材料科技(苏州)有限公司 | Powder metallurgy side hole forming die convenient for demoulding |
Citations (8)
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| US4518335A (en) * | 1984-03-14 | 1985-05-21 | Allied Corporation | Dilatant mold and dilatant molding apparatus |
| JPS61273298A (en) * | 1985-05-28 | 1986-12-03 | Nippon Kokan Kk <Nkk> | Molding method for powder |
| EP0249936A2 (en) * | 1986-06-17 | 1987-12-23 | Nippon Kokan Kabushiki Kaisha | Method for molding powders |
| CN2393708Y (en) * | 1999-09-28 | 2000-08-30 | 万融机械工业有限公司 | Vacuum forming apparatus with fastening press mechanism |
| CN2607246Y (en) * | 2002-08-22 | 2004-03-24 | 大连大锻机床设备厂 | Heat pressing shaping vacuumizing hydraulic press |
| CN201064955Y (en) * | 2007-06-12 | 2008-05-28 | 南通富仕液压机床有限公司 | Upper fixed board structure for dry powder automatic forming hydraulic press die carrier |
| CN101678516A (en) * | 2007-04-04 | 2010-03-24 | Gkn烧结金属有限公司 | Powder metal forging and method and apparatus of manufacture |
| CN202571227U (en) * | 2012-05-21 | 2012-12-05 | 武汉钢铁(集团)公司 | Adjustable supporting and pulling rod |
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2012
- 2012-02-28 CN CN 201210046897 patent/CN102554226B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518335A (en) * | 1984-03-14 | 1985-05-21 | Allied Corporation | Dilatant mold and dilatant molding apparatus |
| JPS61273298A (en) * | 1985-05-28 | 1986-12-03 | Nippon Kokan Kk <Nkk> | Molding method for powder |
| EP0249936A2 (en) * | 1986-06-17 | 1987-12-23 | Nippon Kokan Kabushiki Kaisha | Method for molding powders |
| CN2393708Y (en) * | 1999-09-28 | 2000-08-30 | 万融机械工业有限公司 | Vacuum forming apparatus with fastening press mechanism |
| CN2607246Y (en) * | 2002-08-22 | 2004-03-24 | 大连大锻机床设备厂 | Heat pressing shaping vacuumizing hydraulic press |
| CN101678516A (en) * | 2007-04-04 | 2010-03-24 | Gkn烧结金属有限公司 | Powder metal forging and method and apparatus of manufacture |
| CN201064955Y (en) * | 2007-06-12 | 2008-05-28 | 南通富仕液压机床有限公司 | Upper fixed board structure for dry powder automatic forming hydraulic press die carrier |
| CN202571227U (en) * | 2012-05-21 | 2012-12-05 | 武汉钢铁(集团)公司 | Adjustable supporting and pulling rod |
Non-Patent Citations (1)
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| 吴丽贞: "多场耦合下粉末成形固结装备的设计研究", 《华南理工大学硕士学位论文》, 30 April 2011 (2011-04-30), pages 20 - 26 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773477A (en) * | 2012-08-16 | 2012-11-14 | 俞红霞 | Vacuumizing forming device and method of magnetic field hydraulic machine |
| CN107866570A (en) * | 2017-12-15 | 2018-04-03 | 东北大学 | A kind of equipment for powder metallurgy warm pressing formation |
| CN113276466A (en) * | 2021-05-10 | 2021-08-20 | 盐城凯龙药业有限公司 | Cimetidine tablet tabletting process and tabletting equipment thereof |
| CN116944497A (en) * | 2023-09-18 | 2023-10-27 | 泰州市华诚钨钼制品有限公司 | Tungsten molybdenum alloy piece shaping pressing equipment |
| CN116944497B (en) * | 2023-09-18 | 2023-12-08 | 泰州市华诚钨钼制品有限公司 | Tungsten molybdenum alloy piece shaping pressing equipment |
| CN117655324A (en) * | 2024-01-29 | 2024-03-08 | 虞锋超硬材料科技(苏州)有限公司 | Powder metallurgy side hole forming die convenient for demoulding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102554226B (en) | 2013-07-10 |
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