CN103506622A - Isostatic compaction mould, compaction method utilizing mould and accessories of mould for powder sintering materials - Google Patents
Isostatic compaction mould, compaction method utilizing mould and accessories of mould for powder sintering materials Download PDFInfo
- Publication number
- CN103506622A CN103506622A CN201310455407.9A CN201310455407A CN103506622A CN 103506622 A CN103506622 A CN 103506622A CN 201310455407 A CN201310455407 A CN 201310455407A CN 103506622 A CN103506622 A CN 103506622A
- Authority
- CN
- China
- Prior art keywords
- die cavity
- mould
- core
- retainer device
- 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.)
- Granted
Links
Images
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses an isostatic compaction mould, compaction method utilizing the mould and accessories of the mould for powder sintering materials, and the filling speed of powdery materials in a mould cavity can be controlled. The isostatic compaction mould comprises an outer mould and a mould core, a long and narrow cavity is formed between the outer mould and the mould core, a material injection port is formed in the upper end of the cavity, and the powdery materials for compaction enter the cavity through the material injection port and fall through the gravity to fill the cavity. A material supporting device is arranged in the cavity, when the powdery materials are filled into the cavity, the material supporting device is driven by a position control mechanism which does not affect filling operation to move in the cavity from top to bottom. In the process of filling, the powdery materials do not fall off freely any longer; however the powdery materials are supported by the material supporting device and fall slowly along with the material supporting device. In the process of falling, the evenly-mixed powdery materials are pushed and squeezed to move downwards together in a pushed mode, segregation does not happen, and components of the powdery materials in each portion of the cavity are even after the cavity is filled with the powdery materials.
Description
Technical field
The application relates to the equal pressing forming technology field of sintered powder material, is specifically related to isostatic pressing mold, forming method and the annex thereof of sintered powder material.
Background technology
In applicant's Chinese patent literature (calling list of references in the following text) application, that publication number is CN103009662A of the application, a kind of isostatic pressing mold of producing powder sintered tubulose filter core is disclosed.According to this patent documentation description [0039] to [0045] section record and Figure of description 3 shown in, this mould comprises external mold and core, between external mold and core, form long and narrow die cavity, there is sprue the upper end of this die cavity, the powder stock that moulding is used via this sprue, enter die cavity and by gravity fall with by this mold filling.After filling, need carry out further assembling before moulding and sealing to mould (as the step e) in Fig. 3, and then is placed in iso-static pressure shaping machine and carries out moulding, obtain pressed compact after moulding, finally again pressed compact is put into sintering furnace and carry out sintering, obtain filter core product.
In the past, produce the multiplex alloyed powder of powder stock of powder sintered tubulose filter core, during sintering, mainly by the gap between powder particle and the volatilization of pore creating material, carried out pore-forming.And present inventor tends to produce filter core with element powder, during sintering, to lean on the different caused inclined to one side diffusion reactions of intrinsic diffusion coefficient between different elements to carry out pore-forming.When using element powder to produce filter core, the powder stock that moulding is used is the mixed powder being mixed by different element powder.Due to the difference to some extent often such as the quality of different element powder, particle diameter, conventionally cause between them, entering die cavity and producing relative fall by free gravity dropping process, in this case, will causing product composition inhomogeneous.
Summary of the invention
The application's technical problem to be solved 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 application's isostatic pressing mold comprises external mold and core, between described external mold and core, form long and narrow die cavity, there is sprue the upper end of this die cavity, the powder stock that moulding is used via this sprue, enter die cavity and by gravity fall with by this mold filling, retainer device is housed in described die cavity, when filling powder powder stock in die cavity, thereby this retainer device drives motion from top to bottom in described die cavity by a position control mechanism that does not affect filling operation.
The step that the isostatic pressing method of the application's sintered powder material comprises is: one, to filling powder powder stock in the die cavity of above-mentioned isostatic pressing mold, meanwhile, operation retainer device in this mold cavity motion from top to bottom until filling is complete; Two, described mould is carried out to further assembling and the sealing before moulding; Three, by described mould as for carrying out moulding in iso-static pressure shaping machine.
In the application for the retainer device of above-mentioned isostatic pressing mold, comprise with the die cavity cross section of described mould and keep the operate portions being sealed and matched, when filling powder powder stock in described die cavity, described operate portions is along with the motion from top to bottom in this die cavity of this retainer device.
Described retainer device can the free-falling of blocks powder raw material in die cavity, can remain powder stock is deposited in above retainer device in mold filling process.Like this, powder stock is no longer free-falling in stowing operation, but is held up and along with the slower decline of retainer device by retainer device.In this decline process, mixed uniformly powder stock is being pushed together and is being moved downward, and does not produce segregation, and after mold filling, its powder stock composition is everywhere even.Obviously, this mould is particularly suitable for the isostatic compaction of the powder stock that mixed by element powder, and in the time of can effectively overcoming mold filling, different element powder produce the problem of relative falls.
Below in conjunction with the drawings and specific embodiments, the application is described further.The aspect that the application is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by the application's practice.
Accompanying drawing explanation
Fig. 1 is the isostatic pressing mold of the application's sintered powder material original state figure when filling powder powder stock.
Fig. 2 is the isostatic pressing mold of the application's sintered powder material final state figure when filling powder powder stock.
Fig. 3 carries out the schematic diagram of the further assembling before moulding to mould in the application.
In figure, be labeled as: 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.
The specific embodiment
The isostatic pressing mold of sintered powder material as shown in Figure 1, 2, comprise external mold 1 and core 2, between external mold 1 and core 2, form long and narrow die cavity 3, there is sprue 4 upper end of this die cavity 3, the powder stock 14 that moulding is used via this sprue 4, enter die cavity 3 and by gravity fall with by these die cavity 3 fillings, retainer device 5 is housed in die cavity 3, when filling powder powder stock 14 in die cavity 3, thereby this retainer device 5 drives in described die cavity 3 motion from top to bottom by a position control mechanism that does not affect filling operation.Particularly, as shown in Figure 1, 2, described sintered powder material is powder sintered tubulose filter core; Described external mold 1 is tubular external member, and described core 2 is cylindrical bar, and between external mold 1 and core 2, has to be useful on and keep between external mold 1 and core 2 radial position and do not affect upper locator 6 and the lower locating device 7 that filling operates.Certainly, except above-mentioned tubular structure, sintered powder material can be also other shapes, tabular for example, and at this moment, external mold 1, core 2 etc. also will be done corresponding structural adjustment, so that die cavity 3 adapts with the shape of sintered powder material.Certainly, make above-mentioned isostatic pressing mold finally can in iso-static pressure shaping machine, carry out moulding, this mould also should comprise makes complete totally enclosed other parts of die cavity 3, yet, the application's essence is the improvement of mould structure during filling powder powder stock 14 process in subtend isostatic pressing mold, as for the technological means of after filling, mould being carried out to further assembling before moulding and sealing, belong to the state of the art (can referring to list of references), so locate to repeat no more.In above-mentioned mould, owing in its die cavity 3, retainer device 5 being housed, when filling powder powder stock 14 in die cavity 3, thereby this retainer device 5 drives in described die cavity 3 motion from top to bottom by a position control mechanism that does not affect filling operation, therefore, powder stock 14 is no longer free-falling in stowing operation, but by 5 picking-ups of retainer device and along with the slower decline of retainer device 5, in this decline process, mixed uniformly powder stock is being pushed together and is being moved downward, do not produce segregation, after mold filling, its powder stock composition is everywhere even.
As Fig. 1,2, above-mentioned retainer device 5 preferably should have with the cross section of die cavity 3 and keeps the operate portions 5a being sealed and matched, and this operate portions 5a is connected with position control mechanism by syndeton.Obviously, by arranging with the cross section maintenance of the die cavity 3 operate portions 5a that is sealed and matched, can avoid powder stock 14 to reveal with the gap that coordinates between retainer device 5 from die cavity 3 chamber walls 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, thereby makes retainer device 5 not keep static being subject to the relying on the stiction between this elastic sealing element and die cavity 3 chamber walls as the used time of position control mechanism.When die cavity is darker, for the ease of moulded blank demoulding from mould, conventionally can design certain pattern draft, like this, the width of die cavity 3 is not in full accord, but has certain variation along withdrawing pattern direction.Elastic sealed body can be according to the adaptive adjusting of the width of die cavity 3, thereby guarantees 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 not keep static being subject to the relying on the stiction between this elastic sealing element and die cavity 3 chamber walls as the used time of position control mechanism, like this, position control mechanism does not need retainer device 5 to support, and only require that position control mechanism can apply downward pulling force to retainer device 5, thereby can simplify the structure of position control mechanism.
Owing to not needing that retainer device 5 is supported, the position control mechanism that the application adopted on this basis as shown in Figure 1, 2, it comprises the material feeding workbench 13 that is provided with Shi Dongyuan, external mold 1 and the vertical top that is located at material feeding workbench 13 of core 2, described Shi Dong source is connected with retainer device 5 lower ends by stay cord 8, described stay cord 8 is arranged in the die cavity 3 of filling powder powder stock 14 not yet, and stay cord 8 lower ends are through mould and material feeding workbench 13 and connect Shi Dongyuan.Wherein manual drive both can be taked in ，Shi Dong source, also can adopt driving arrangement to drive.As a kind of concrete structure in Shi Dong source, ，Shi Dong source comprises the rotation mechanism of taking that is wound around the rotatable drum 9 of described stay cord 8 and drives these cylinder 9 rotations as shown in Figure 1, 2, takes rotation mechanism and comprises handle 10.The operation principle of above-mentioned position control mechanism is: by taking rotation mechanism, drive cylinder 9 rotations, and then pull stay cord 8 downwards, stay cord 8, at the interior retainer device 5 that involves of die cavity 3 of filling powder powder stock 14 not yet, makes retainer device 5 overcome frictions move downward downwards thus.Certainly, in the application's mould, its position control mechanism also can adopt other design under the prerequisite that does not affect filling operation.For example, retainer device 5 and core 2 can be set to one, core 2 upper ends lengthen, and then core 2 are designed to a floating structure that can decline; During to the interior filling powder powder stock 14 of described die cavity 3, drive core 2 simultaneously and drive retainer device 5 to decline together, because core 2 upper ends are lengthened out, therefore die cavity 3 parts can't change when core 2 declines, after filling, can again core 2 lower end extensions be taken off to (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 system, adventitia 1 is provided with a lower locating device 7 with the bottom of core 2, these lower locating device 7 integral assemblings match in the lower port of adventitia 1 and 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 is provided with a upper locator 6 with the top of core 2, and upper locator 6 is supported between adventitia 1 and core 2, and has material spilling hole on upper locator 6; The upper end of adventitia 1 slightly exceeds the upper end of upper locator 6 and core 2, thereby forms one for receiving the groove of powder stock 14.The adventitia 1 assembling through described upper locator 6, lower locating device 7 realizations and core 2 stand and are located on material feeding workbench 13, in this material feeding workbench 13, cylinder 9 are installed, cylinder 9 connecting handles 10.Between above-mentioned external mold 1 and core 2, form and in long and narrow tubulose die cavity 3, have a retainer device 5, retainer device 5 has with the cross section of die cavity 3 and keeps the operate portions 5a being sealed and matched, operate portions 5a lower end is provided with steel bushing 5b, between steel bushing 5b and die cavity 3, there is certain interval, operate portions 5a is a ring-shaped rubber encapsulant, and this ring-shaped rubber encapsulant is compressed between external mold 1 and core 2; Steel bushing 5b lower end 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 filling powder powder stock 14 not yet, 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, the material spilling hole of powder stock 14 by upper locator 6 is downwards and be deposited in retainer device 5 tops.After this, artificial turning 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 that is deposited in retainer device 5 tops starts pushing together and moves downward, whole decline process does not produce segregation, and after mold filling, its powder stock composition is everywhere even.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 downward 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 devices.After this, remove hopper 11, in mould upper end, install end sealing device 12.In order to strengthen the sealing of mould, also can seal rubber sleeve be set in both mold ends.After this, will further assemble and seal complete mould as for carrying out moulding in iso-static pressure shaping machine.After moulding, obtain pressed compact, finally again pressed compact is put into sintering furnace and carried out sintering, obtain filter core product.
Claims (10)
1. the isostatic pressing mold of sintered powder material, comprise external mold (1) and core (2), between external mold (1) and core (2), form long and narrow die cavity (3), there is sprue (4) upper end of this die cavity (3), the powder stock that moulding is used (14) via this sprue (4), enter die cavity (3) and by gravity fall with by this die cavity (3) filling, it is characterized in that: retainer device (5) is housed in described die cavity (3), when filling powder powder stock (14) in die cavity (3), this retainer device (5) thus by a position control mechanism that does not affect filling operation, drive motion from top to bottom 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; Described external mold (1) is tubular external member, described core (2) is cylindrical bar, has to be useful on keep between external mold (1) and core (2) radial position and do not affect upper locator (6) and the 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 with the cross section of die cavity (3) and keeps the operate portions (5a) 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: when described retainer device (5) moves downward 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), thereby makes retainer device (5) not keep static being subject to the relying on the stiction between the wall of this elastic sealing element and die cavity (3) chamber as the used time of position control mechanism.
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) that is provided with Shi Dongyuan, the vertical top that is located at material feeding workbench (13) of external mold (1) and core (2), described Shi Dong source is connected with retainer device (5) lower end by stay cord (8), described stay cord (8) is arranged in the die cavity (3) of filling powder powder stock (14) not yet, 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 Shi Dong source comprises the rotation mechanism of taking that is wound around the rotatable drum (9) of described stay cord (8) and drives this cylinder (9) rotation.
8. the isostatic pressing method of sintered powder material, the step comprising is: one, to filling powder powder stock (14) in the die cavity (3) of the isostatic pressing mold of the sintered powder material described in any one claim in claim 1 to 7, meanwhile, operation retainer device (5) from top to bottom moves until filling is complete in this mold cavity (3); Two, described mould is carried out to further assembling and the sealing before moulding; Three, by described mould as for carrying out moulding in iso-static pressure shaping machine.
9. for the retainer device of the isostatic pressing mold of the sintered powder material described in claim 1 to 7 any one claim, it is characterized in that: comprise with die cavity (3) cross section of described mould and keep the operate portions (5a) being sealed and matched, when filling powder powder stock (14) in described die cavity (3), described operate portions (5a) is along with the motion from top to bottom in this die cavity (3) of this retainer device (5).
10. retainer device as claimed in claim 9, is characterized in that: described operate portions (5a) is loop configuration, and 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 true CN103506622A (en) | 2014-01-15 |
| CN103506622B 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106575055A (en) * | 2014-09-12 | 2017-04-19 | 住友电气工业株式会社 | Liquid crystal protection plate and method for producing liquid crystal protection 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106575055A (en) * | 2014-09-12 | 2017-04-19 | 住友电气工业株式会社 | Liquid crystal protection plate and method for producing liquid crystal protection 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103506622B (en) | 2016-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101391301B (en) | Powder-feeding device and method in magnet forming process | |
| CN107379393A (en) | A kind of injection moulding apparatus for extruding cutting | |
| CN107932971B (en) | Pressing production system for extrusion molding product | |
| CN103506622A (en) | Isostatic compaction mould, compaction method utilizing mould and accessories of mould for powder sintering materials | |
| WO2010038322A1 (en) | Device for continuously forming unfired ceramic formed bodies | |
| CN105437355A (en) | Dry-wet forming method and device for an artificial stone | |
| CN209240364U (en) | A kind of vertical double coloured plastic injection machine | |
| CN104742248A (en) | Production method of concrete cylindrical product with base | |
| CN104827032A (en) | Honeycomb-shaped metal filter core forming method and mold | |
| CN106976153B (en) | Double-layer cloth brick making press machine | |
| CN113119288A (en) | Molding machine servo mechanism with controllable feeding process and working process thereof | |
| CN201677006U (en) | Casting molder | |
| CN201791972U (en) | Forming mould for manufacturing thin-wall type magnetic ring | |
| CN105130432B (en) | A kind of tantalum-niobium smelt calcines hydroxide bulk material crucible preparation method | |
| CN203541522U (en) | Thin-wall powder metallurgy forming die | |
| CN101733822B (en) | Ceramic automatic hot press | |
| CN205464338U (en) | Pulverulent product finishing machine die carrier plug adjusting device | |
| CN112917641B (en) | Concrete perforated brick casting molding processing system | |
| CN103737700A (en) | Method for manufacturing bricks for construction | |
| CN111360248B (en) | Improved generation one-die multi-cavity powder metallurgy forming die | |
| CN112895103A (en) | Method for casting and molding concrete perforated brick | |
| CN105171896A (en) | Production device for cement guyed disk assembly line | |
| CN217597353U (en) | Concrete inspection shaft production facility | |
| CN111002626A (en) | Automatic powder molding ingot loading equipment and molding method | |
| CN218593545U (en) | Injection mold convenient for demolding |
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 |