CN103506622B - The isostatic pressing mold of sintered powder material, forming method and annex thereof - Google Patents
The isostatic pressing mold of sintered powder material, forming method and annex thereof Download PDFInfo
- Publication number
- CN103506622B CN103506622B CN201310455407.9A CN201310455407A CN103506622B CN 103506622 B CN103506622 B CN 103506622B CN 201310455407 A CN201310455407 A CN 201310455407A CN 103506622 B CN103506622 B CN 103506622B
- Authority
- CN
- China
- Prior art keywords
- die cavity
- powder
- retainer device
- mold
- filling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses the isostatic pressing mold of a kind of controlled powder process powder stock sintered powder material of filling velocity in mold cavity, use the isostatic pressing method of this mould and the special accessories of this mould.Isostatic pressing mold comprises external mold and core, long and narrow die cavity is formed between described external mold and core, there is sprue the upper end of this die cavity, shaping powder stock enters die cavity via this sprue and by gravity fall with by this mold filling, described die cavity is built with retainer device, when in die cavity during filling powder powder stock, this retainer device does not affect by one the position control mechanism that filling operates and carries out driving thus from top to bottom move in described die cavity.Powder stock is no longer free-falling in stowing operation, but is held up by retainer device and along with the slower decline of retainer device.In this decline process, mixed uniformly powder stock pushes and moves downward together, does not produce segregation, its powder stock uniform composition everywhere after mold filling.
Description
Technical field
The application relates to the equal pressing forming technology field of sintered powder material, is specifically related to the isostatic pressing mold of sintered powder material, forming method and annex thereof.
Background technology
Applicant's application of the application, publication number is disclose a kind of isostatic pressing mold producing powder sintered tubulose filter core in the Chinese patent literature (calling bibliography in the following text) of CN103009662A.According to this patent document description [0039] to the record of [0045] section and Figure of description 3, this mould comprises external mold and core, long and narrow die cavity is formed between external mold and core, there is sprue the upper end of this die cavity, and shaping powder stock enters die cavity via this sprue and by gravity fall with by this mold filling.After filling, need to mould carry out shaping before further assembling and sealing (as the step e) in Fig. 3, and then be placed on and carry out shaping in iso-static pressure shaping machine, after shaping, obtain pressed compact, finally again pressed compact is put into sintering furnace to sinter, obtain filter core product.
In the past, produce the multiplex alloyed powder of powder stock of powder sintered tubulose filter core, during sintering, mainly carry out pore-forming by the volatilization of the gap between powder particle and pore creating material.And present inventor tends to use element powder to produce filter core, the inclined diffusion reaction between different element caused by intrinsic diffusion coefficient difference during sintering, to be leaned on to carry out pore-forming.When using element powder to produce filter core, shaping powder stock is the mixed powder mixed by different element powder.Due to the often difference to some extent such as quality, particle diameter of different element powder, usually to cause between them, entering die cavity and producing relative fall by free gravity dropping process, in this case, product composition will being caused uneven.
Summary of the invention
Technical problems to be solved in this application be to provide a kind of controlled powder process powder stock sintered powder material of filling velocity in mold cavity isostatic pressing mold, use the isostatic pressing method of this mould and the special accessories of this mould.
The isostatic pressing mold of the application comprises external mold and core, long and narrow die cavity is formed between described external mold and core, there is sprue the upper end of this die cavity, shaping powder stock enters die cavity via this sprue and by gravity fall with by this mold filling, described die cavity is built with retainer device, when in die cavity during filling powder powder stock, this retainer device does not affect by one the position control mechanism that filling operates and carries out driving thus from top to bottom move in described die cavity.
The step that the isostatic pressing method of the sintered powder material of the application comprises is: one, to filling powder powder stock in the die cavity of above-mentioned isostatic pressing mold, meanwhile, and operation retainer device from top to bottom moves until filling is complete in this mold cavity; Two, shaping front further assembling and sealing are carried out to described mould; Three, described mould is shaping as carrying out in iso-static pressure shaping machine.
For the retainer device of above-mentioned isostatic pressing mold in the application, comprise the operate portions keeping with the die cavity cross section of described mould being sealed and matched, when in described die cavity during filling powder powder stock, described operate portions is from top to bottom moved along with this retainer device in this die cavity.
Described retainer device can the free-falling of blocks powder raw material in die cavity, can remain and be deposited in above retainer device by powder stock in mold filling process.Like this, powder stock is no longer free-falling in stowing operation, but is held up by retainer device and along with the slower decline of retainer device.In this decline process, mixed uniformly powder stock pushes and moves downward together, does not produce segregation, its powder stock uniform composition everywhere after mold filling.Obviously, this mould is particularly suitable for the isostatic compaction of the powder stock mixed by element powder, effectively can overcome the problem of different element powder generation relative fall during mold filling.
Below in conjunction with the drawings and specific embodiments, the application is described further.The aspect that the application adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by the practice of the application.
Accompanying drawing explanation
Fig. 1 is the original state figure of isostatic pressing mold when filling powder powder stock of the application's sintered powder material.
Fig. 2 is the final state figure of isostatic pressing mold when filling powder powder stock of the application's sintered powder material.
Fig. 3 is the schematic diagram in the application, mould being carried out to shaping front further assembling.
Be labeled as in figure: external mold 1, core 2, die cavity 3, sprue 4, retainer device 5, operate portions 5a, steel bushing 5b, upper locator 6, lower locating device 7, stay cord 8, rotatable drum 9, handle 10, hopper 11, upper end sealing device 12, material feeding workbench 13, powder stock 14.
Detailed description of the invention
The isostatic pressing mold of sintered powder material as shown in Figure 1, 2, comprise external mold 1 and core 2, long and narrow die cavity 3 is formed between external mold 1 and core 2, there is sprue 4 upper end of this die cavity 3, shaping powder stock 14 enters die cavity 3 via this sprue 4 and by gravity fall with by this die cavity 3 filling, die cavity 3 is built with retainer device 5, when in die cavity 3 during filling powder powder stock 14, this retainer device 5 does not affect by one position control mechanism that filling operates and carries out driving thus motion from top to bottom in described die cavity 3.Specifically, as shown in Figure 1, 2, described sintered powder material is powder sintered tubulose filter core; Then described external mold 1 is tubular external member, and described core 2 is cylindrical bar, and has between external mold 1 and core 2 and have for keeping radial position between external mold 1 and core 2 and not affecting the upper locator 6 and lower locating device 7 that filling operates.Certainly, except above-mentioned tubular structure, sintered powder material also can be other shapes, such as tabular, and at this moment, external mold 1, core 2 etc. also will do corresponding structural adjustment, adapts with the shape of sintered powder material to make die cavity 3.Certainly, above-mentioned isostatic pressing mold finally can be carried out in iso-static pressure shaping machine shaping, this mould also should comprise makes complete other parts totally enclosed of die cavity 3, but, the improvement of mould structure when the essence of the application is filling powder powder stock 14 process in subtend isostatic pressing mold, as for after filling to mould carry out shaping before further assembling and the technological means of sealing then belong to the state of the art (can see bibliography), so place repeats no more.In above-mentioned mould, because its die cavity 3 is built with retainer device 5, when in die cavity 3 during filling powder powder stock 14, this retainer device 5 does not affect by one position control mechanism that filling operates and carries out driving thus motion from top to bottom in described die cavity 3, therefore, powder stock 14 is no longer free-falling in stowing operation, but to be held up by retainer device 5 and along with the slower decline of retainer device 5, in this decline process, mixed uniformly powder stock pushes and moves downward together, do not produce segregation, its powder stock uniform composition everywhere after mold filling.
As Fig. 1,2, above-mentioned retainer device 5 preferably should have the operate portions 5a keeping with the cross section of die cavity 3 being sealed and matched, and this operate portions 5a is connected with position control mechanism by syndeton.Obviously, by arrange and the cross section of the die cavity 3 operate portions 5a that keeps being sealed and matched can avoid powder stock 14 to reveal from die cavity 3 chamber wall with the gap that coordinates between retainer device 5 completely downwards.On this basis, described operate portions 5a preferably has elastic sealed body, described elastic sealed body is compressed between external mold 1 and core 2, thus makes retainer device 5 rely on the stiction between this elastic sealing element and die cavity 3 chamber wall when the effect not being subject to position control mechanism and keep static.When die cavity is darker, for the ease of moulded blank demoulding from mould, usually can design certain pattern draft, like this, the width of die cavity 3 is not completely the same, but there is certain change along withdrawing pattern direction.Elastic sealed body according to the adaptive adjustment of the width of die cavity 3, thus can ensure that operate portions 5a keeps being sealed and matched with the cross section of die cavity 3 all the time in the whole decline process of retainer device 5.The more important thing is, because elastic sealed body is compressed between external mold 1 and core 2, and then make retainer device 5 rely on the stiction between this elastic sealing element and die cavity 3 chamber wall when the effect not being subject to position control mechanism and keep static, like this, position control mechanism does not need to support retainer device 5, and only require that position control mechanism can apply downward pulling force to retainer device 5, thus the structure of position control mechanism can be simplified.
Owing to not needing to support retainer device 5, adopted the on this basis position control mechanism of the application as shown in Figure 1, 2, it comprises the material feeding workbench 13 being provided with Shi Dongyuan, external mold 1 and core 2 erect above material feeding workbench 13, the described source of executing is connected with retainer device 5 lower end by stay cord 8, described stay cord 8 is arranged in the die cavity 3 of not yet filling powder powder stock 14, and stay cord 8 lower end is through mould and material feeding workbench 13 and connect Shi Dongyuan.Wherein, manual drive both can be taked in the source of executing, also can adopt driving arrangement to drive.As a kind of concrete structure in the source of executing, as shown in Figure 1, 2, the source of executing comprise the rotatable drum 9 that is wound around described stay cord 8 and drive this cylinder 9 to rotate take rotation mechanism, take rotation mechanism and comprise handle 10.The operation principle of above-mentioned position control mechanism is: driving cylinder 9 to rotate by taking rotation mechanism, and then pulling stay cord 8 downwards, and stay cord 8 involves retainer device 5 downwards in the die cavity 3 of not yet filling powder powder stock 14, makes retainer device 5 overcome friction move downward thus.Certainly, in the mould of the application, its position control mechanism also can adopt other design under the prerequisite not affecting filling operation.Such as, retainer device 5 and core 2 can be set to one, core 2 upper end lengthens, and then core 2 is designed to a floating structure that can decline; In described die cavity 3 during filling powder powder stock 14, drive core 2 simultaneously and drive retainer device 5 to decline together, because core 2 upper end is lengthened out, therefore die cavity 3 part can't change when core 2 declines, after filling, can again core 2 lower end extension be taken off (the two-part structure that core 2 is designed to separable docking).
Embodiment
As shown in Figure 1,2 and 3, the isostatic pressing mold of powder sintered tubulose filter core, its core 2 is a steel solid cylindrical bar, this core 2 is set in the tubular external mold 1 of a rubber, adventitia 1 is provided with a lower locating device 7 with the bottom of core 2, this lower locating device 7 integral assembling is in the lower port of adventitia 1 and match with this lower port, and the center positioning hole on lower locating device 7 coordinates with the lower end of core 2, and the upper surface of lower locating device 7 is also provided with positioning spigot; Adventitia 1 and the top of core 2 are provided with a upper locator 6, and upper locator 6 is supported between adventitia 1 and core 2, and upper locator 6 has material spilling hole; The upper end of adventitia 1 slightly exceeds the upper end of upper locator 6 and core 2, thus forms one for receiving the groove of powder stock 14.The adventitia 1 assembled through described upper locator 6, lower locating device 7 realization and core 2 erect on material feeding workbench 13, are provided with cylinder 9, cylinder 9 connecting handle 10 in this material feeding workbench 13.Formed between above-mentioned external mold 1 and core 2 in elongate tubular die cavity 3 and have a retainer device 5, retainer device 5 has the operate portions 5a keeping with the cross section of die cavity 3 being sealed and matched, the lower end of operate portions 5a is provided with steel bushing 5b, certain interval is had between steel bushing 5b and die cavity 3, operate portions 5a is then a ring-shaped rubber encapsulant, and this ring-shaped rubber encapsulant is compressed between external mold 1 and core 2; The lower end of steel bushing 5b is connected with two stay cords 8, these two stay cords 8 are symmetrical with the central axis of core 2, two stay cords 8 are arranged in the die cavity 3 of not yet filling powder powder stock 14, and their lower ends are through lower locating device 7 and material feeding workbench 13 and be wrapped on cylinder 9.
As shown in Figure 1, when needs are in die cavity 3 during filling powder powder stock 14, first retainer device 5 is positioned at the top of die cavity 3, then by hopper 11 to described groove filling powder stock 14, powder stock 14 is by the material spilling hole of upper locator 6 downwards and be deposited in above retainer device 5.After this, manual rotation's handle 10, cylinder 9 and then start to be wound around and pull stay cord 8 to move downward, retainer device 5 beginning under the involving of stay cord is slowly descending, all the time the powder stock 14 be deposited in above retainer device 5 starts to push and moves downward together, whole decline process does not produce segregation, its powder stock uniform composition everywhere after mold filling.As shown in Figure 2, after steel bushing 5b goes downwards to and contacts with the positioning spigot of lower locating device 7, described retainer device 5 moves downwardly to the stop position of setting, and now, retainer device 5 continues to be retained on this mould as die cavity 3 lower end sealing device.After this, remove hopper 11, install end sealing device 12 in mould upper end.In order to strengthen the sealing of mould, also seal rubber sleeve can be set in both mold ends.After this, shaping as carrying out in iso-static pressure shaping machine by assembling and seal complete mould further.Obtain pressed compact after shaping, finally again pressed compact is put into sintering furnace and sinter, obtain filter core product.
Claims (10)
1. the isostatic pressing mold of sintered powder material, comprise external mold (1) and core (2), long and narrow die cavity (3) is formed between external mold (1) and core (2), there is sprue (4) upper end of this die cavity (3), shaping powder stock (14) enters die cavity (3) via this sprue (4) and by gravity fall with by this die cavity (3) filling, described die cavity (3) is built with retainer device (5), it is characterized in that: when to die cavity (3) middle filling powder powder stock (14), this retainer device (5) does not affect by one the position control mechanism that filling operates and carries out driving thus from top to bottom move in described die cavity (3).
2. the isostatic pressing mold of sintered powder material as claimed in claim 1, is characterized in that: described sintered powder material is specially powder sintered tubulose filter core; Then described external mold (1) is tubular external member, described core (2) is cylindrical bar, has and have for keeping radial position between external mold (1) and core (2) and not affecting the upper locator (6) and lower locating device (7) that filling operates between external mold (1) and core (2).
3. the isostatic pressing mold of sintered powder material as claimed in claim 1 or 2, it is characterized in that: described retainer device (5) has the operate portions (5a) keeping with the cross section of die cavity (3) being sealed and matched, and this operate portions (5a) is connected with position control mechanism by syndeton.
4. the isostatic pressing mold of sintered powder material as claimed in claim 3, it is characterized in that: after described retainer device (5) moves downwardly to the stop position of setting, retainer device (5) continues to be retained on this mould as die cavity (3) lower end sealing device.
5. the isostatic pressing mold of sintered powder material as claimed in claim 3, it is characterized in that: described operate portions (5a) has elastic sealed body, described elastic sealed body is compressed between external mold (1) and core (2), thus makes retainer device (5) rely on the stiction between this elastic sealing element and die cavity (3) chamber wall when the effect not being subject to position control mechanism and keep static.
6. the isostatic pressing mold of sintered powder material as claimed in claim 5, it is characterized in that: described position control mechanism comprises the material feeding workbench (13) being provided with Shi Dongyuan, external mold (1) and core (2) erect the top in material feeding workbench (13), the described source of executing is connected with retainer device (5) lower end by stay cord (8), described stay cord (8) is arranged in the die cavity (3) of not yet filling powder powder stock (14), and stay cord (8) lower end is through mould and material feeding workbench (13) and connect Shi Dongyuan.
7. the isostatic pressing mold of sintered powder material as claimed in claim 6, is characterized in that: described in the source of executing comprise the rotatable drum (9) that is wound around described stay cord (8) and drive this cylinder (9) to rotate take rotation mechanism.
8. the isostatic pressing method of sintered powder material, filling powder powder stock (14) in the die cavity (3) that the step comprised is: the isostatic pressing mold of the sintered powder material one, in claim 1 to 7 described in any one claim, meanwhile, operate retainer device (5) from top to bottom to move until filling is complete in this mold cavity (3); Two, shaping front further assembling and sealing are carried out to described mould; Three, described mould is shaping as carrying out in iso-static pressure shaping machine.
9. for the retainer device of the isostatic pressing mold of the sintered powder material in claim 1 to 7 described in any one claim, it is characterized in that: comprise the operate portions (5a) keeping with the die cavity of described mould (3) cross section being sealed and matched, when in described die cavity (3) time filling powder powder stock (14), described operate portions (5a) is from top to bottom moved along with this retainer device (5) in this die cavity (3).
10. retainer device as claimed in claim 9, it is characterized in that: described operate portions (5a) is loop configuration, the lower end of this operate portions (5a) is provided with the steel bushing (5b) for connecting stay cord (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310455407.9A CN103506622B (en) | 2013-09-29 | 2013-09-29 | The isostatic pressing mold of sintered powder material, forming method and annex thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310455407.9A CN103506622B (en) | 2013-09-29 | 2013-09-29 | The isostatic pressing mold of sintered powder material, forming method and annex thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103506622A CN103506622A (en) | 2014-01-15 |
| CN103506622B true CN103506622B (en) | 2016-02-10 |
Family
ID=49890346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310455407.9A Active CN103506622B (en) | 2013-09-29 | 2013-09-29 | The isostatic pressing mold of sintered powder material, forming method and annex thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103506622B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2016039164A1 (en) * | 2014-09-12 | 2017-06-22 | 住友電気工業株式会社 | Liquid crystal protective plate and method of manufacturing liquid crystal protective plate |
| CN111593221A (en) * | 2020-06-24 | 2020-08-28 | 安徽工业大学 | Preparation method of high-performance molybdenum-scandium alloy and high-performance molybdenum-scandium alloy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995016559A1 (en) * | 1993-12-13 | 1995-06-22 | Sumitomo Electric Industries, Ltd. | Powder molded body manufacturing method and powder feeder |
| CN1268415A (en) * | 1999-03-31 | 2000-10-04 | 住友石炭矿业株式会社 | Method and system for automatic electric sintering |
| JP2003071598A (en) * | 2001-08-31 | 2003-03-11 | Mitsubishi Materials Corp | Powder forming device and powder forming method |
| CN201871731U (en) * | 2010-12-01 | 2011-06-22 | 成都易态科技有限公司 | Mold for forming multichannel filter element |
| CN102554225A (en) * | 2012-02-28 | 2012-07-11 | 南通富仕液压机床有限公司 | Powder metallurgy forming mold carrier with two point five or three point five lower palates |
| CN102873325A (en) * | 2012-09-13 | 2013-01-16 | 宁波科田磁业有限公司 | Method for feeding neodymium iron boron magnetic powder into die for pressing in layered mode |
-
2013
- 2013-09-29 CN CN201310455407.9A patent/CN103506622B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995016559A1 (en) * | 1993-12-13 | 1995-06-22 | Sumitomo Electric Industries, Ltd. | Powder molded body manufacturing method and powder feeder |
| CN1268415A (en) * | 1999-03-31 | 2000-10-04 | 住友石炭矿业株式会社 | Method and system for automatic electric sintering |
| JP2003071598A (en) * | 2001-08-31 | 2003-03-11 | Mitsubishi Materials Corp | Powder forming device and powder forming method |
| CN201871731U (en) * | 2010-12-01 | 2011-06-22 | 成都易态科技有限公司 | Mold for forming multichannel filter element |
| CN102554225A (en) * | 2012-02-28 | 2012-07-11 | 南通富仕液压机床有限公司 | Powder metallurgy forming mold carrier with two point five or three point five lower palates |
| CN102873325A (en) * | 2012-09-13 | 2013-01-16 | 宁波科田磁业有限公司 | Method for feeding neodymium iron boron magnetic powder into die for pressing in layered mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103506622A (en) | 2014-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101391301B (en) | Powder-feeding device and method in magnet forming process | |
| CN103506622B (en) | The isostatic pressing mold of sintered powder material, forming method and annex thereof | |
| CN104827032B (en) | The forming method of honeycomb metal filter core and mould | |
| CN202894328U (en) | Die and automatic molding press thereof | |
| CN103706787A (en) | Die and automatic forming press and forming method thereof | |
| CN104015318A (en) | Plastic bevel gear secondary demolding device | |
| CN201791972U (en) | Forming mould for manufacturing thin-wall type magnetic ring | |
| CN203556875U (en) | Powder metallurgy stagger displacement shaping mold | |
| CN203541522U (en) | Thin-wall powder metallurgy forming die | |
| CN113119288A (en) | Molding machine servo mechanism with controllable feeding process and working process thereof | |
| CN101733822B (en) | Ceramic automatic hot press | |
| CN101664769A (en) | Extruding device of porous hard alloy profile | |
| US2969563A (en) | Plastic working process and apparatus | |
| CN202480205U (en) | Automatic molding device of metal oxide resistor disc body | |
| CN105414525B (en) | Rotating ejection mechanism and the die-casting forming die with the mechanism | |
| CN202344650U (en) | Brick making machine capable of controlling travel fully-automatically | |
| CN219926348U (en) | Slip casting reaction sintering silicon carbide ceramic forming tool | |
| CN217072756U (en) | Material agglomeration forming device | |
| CN217597353U (en) | Concrete inspection shaft production facility | |
| WO2009041915A1 (en) | Dual sleeve moulding method and apparatus | |
| JP2003305595A (en) | Method for forming annular powder molded article and device forming the same | |
| CN106346825A (en) | Automatic semi-continuous powder pressing die and powder pressing method thereof | |
| CN218946350U (en) | Powder metallurgy cycloid rotor shaping die easy to demould | |
| CN103624254B (en) | A kind of thin wall powder metallurgy forming mould and forming method | |
| CN220560417U (en) | Piston type box structure of metal powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |