CN208166867U - A kind of liquid phase hot pressing sintering mold - Google Patents
A kind of liquid phase hot pressing sintering mold Download PDFInfo
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- CN208166867U CN208166867U CN201820593135.7U CN201820593135U CN208166867U CN 208166867 U CN208166867 U CN 208166867U CN 201820593135 U CN201820593135 U CN 201820593135U CN 208166867 U CN208166867 U CN 208166867U
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Abstract
The utility model discloses a kind of liquid phase hot pressing sintering mold, including limit sleeve, the limit sleeve includes the first body and the second body being coaxially arranged from inside to outside, and the wall thickness of the first body is much smaller than the wall thickness of the second body；First body includes at least two fissions being spliced to form.The utility model liquid phase hot pressing sintering mold forms limit sleeve by the different body of two thin and thicks; the second body of higher cost is protected to sacrifice low-cost first body; solve the problems, such as that traditional molding die was difficult to realize has both low cost and can guarantee that sample is intact; hot forming sample can be achieved smoothly to demould, it is ensured that sample nondestructive hurts and utmostly reduces mold damage.
Description
Technical field
The utility model belongs to ceramic composite field, is related to heat pressing forming device, and in particular to a kind of liquid phase hot pressing
Sintering mold utmostly reduces mold and sample damage, it can be achieved that hot forming sample smoothly demoulds.
Background technique
Liquid-phase sintering is the sintering for having liquid phase to participate in.The substance that liquid-phase sintering occurs is made of two-phase or multiphase, is being sintered
At a temperature of, high-melting-point is mutually still solid phase and keeps certain shapes, and low melting point mutually becomes liquid phase.Due to the presence of low melting point phase, with
Simple high-melting-point is compared, and sintering temperature can substantially reduce, and densification rate is greatly speeded up, special to the ceramics of some hard-to-sinters
Favorably.Hot pressed sintering (hot-pressing, HP) is a kind of sintering method of mechanical pressurization, this method is that first ceramic powders are mounted in
In die cavity, powder is heated to firing temperature while pressurization, supplements driving force due to applying pressure from outside,
Densification can be reached within a short period of time, and obtain the microstructure with fine uniform crystal grain.For covalent bond hard-to-sinter
High-temperature ceramic materials (such as Si3N4、B4C、SiC、TiB2、ZrB2), hot pressed sintering is a kind of effective densification technology.Liquid phase heat
Pressure sintering is liquid phase auxiliary hot pressed sintering, and liquid phase driving and mechanical pressure driving are generated under high temperature can remarkably promote sintering, fine and close
Change effect and be better than single hot pressed sintering or liquid-phase sintering, but liquid phase is inevitably pressed against mold driven by pressure
Wall causes the sample of hot forming Nian Jie with mold wall, demoulded after hot pressed sintering in difficult even knockout course damage mold and
Sample.
Currently used hot pressing die, generally cylindrical body monolayer mold take off as long as mold sticking occurs for hot pressed sintering
It is generally had to when mould by die failure to take out sample, often sample taking-up rear surface, which also has defect or macroscopic view occurs, splits
Line will consume mold and being difficult to so as to cause a hot pressing and obtain qualified hot pressing product, cause low efficiency and high
Cost.
Summary of the invention
For the defects in the prior art and insufficient, the purpose of this utility model is to provide a kind of liquid phase hot pressing sintering mould
Tool is able to achieve the hot forming mold that liquid phase hot pressing is sintered not lesioned sample and mold, difficult to solve traditional molding die
Having both low cost and can guarantee the intact problem of sample with realization.
To solve the above problems, the technical solution that the utility model is taken is:
A kind of liquid phase hot pressing sintering mold, including limit sleeve, the limit sleeve include be coaxially arranged from inside to outside
One body and the second body, the wall thickness of the wall thickness of the first body less than the second body；
First body includes at least two fissions being spliced to form.
Optionally, the outer wall of the first body is bonded setting with the inner wall of the second body, and first set intracoelomic cavity is cylindrical cavity
The bus of the binding face of body, the external wall of first set and the second body inner wall and the bus of first set intracoelomic cavity are in cross spider.
Optionally, the outer wall of the first body is bonded setting, the longitudal section of the outer wall of the first body with the inner wall of the second body
To be trapezoidal, the longitudal section of the inner wall of the first body is rectangle.
Optionally, the wall thickness of the second body is 8~10 times of the wall thickness of the first body.
Optionally, the mold further includes the first pressure part and second pressure part that the limit sleeve end is arranged in,
First pressure part and second pressure part give sample pressing force to be sintered in the end of limit sleeve.
It optionally, further include pressure piece protection gasket, pressure piece protects gasket to be arranged in first pressure part or second pressure
Part and sample room to be sintered, it is the sheet body that edge has bulge loop that pressure piece, which protects gasket,.
Optionally, at least one pressure piece additional spacer is also set up in pressure piece protection gasket and sample room to be sintered, pressed
Power part additional spacer is discoid sheet body.
Optionally, the height of first pressure part is greater than the height of second pressure part.
Optionally, first pressure part includes the first compression end and the first pressure transmission end, and second pressure part includes the second compression end
With the second pressure transmission end, the first compression end and the second compression end are discoid pieces, and the first pressure transmission end and the second pressure transmission end are column
Part；The height at the first pressure transmission end is greater than the height at the second pressure transmission end.
Compared with prior art, the utility model has the following advantages that：
The utility model liquid phase hot pressing sintering mold forms limit sleeve by the different body of two thin and thicks, is able to achieve liquid phase
The hot forming mold of hot pressed sintering not lesioned sample and mold, protects higher cost to sacrifice low-cost first body
The second body, it can be achieved that hot forming sample smoothly demoulds, utmostly reduce mold and sample damage.
In addition, the grinding tool of the utility model can also protect the up/down pressure head of higher cost；Gasket all than relatively thin, be 3~
The disk of 5mm thickness, especially protection gasket are protected into low-cost gasket by boss ring protection up/down pressure head
This higher up/down pressure head, while sample can also be protected.First die sleeve is disposable, and up/down pressure head and the second die sleeve are
Reusability, gasket can also Reusability, if but do not have to gasket if, up/down pressure head is just located next to raw material, like that its
Will be bonded by material powder between side surface (especially seaming chuck side surface) and the first die sleeve wall, up/down pressure head, the second die sleeve are all
It is the component of higher cost, once up/down pressure head is bonded by the first die sleeve wall, unloads up/down pressure being tapped with strength
When head, sample may also be badly shaken.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is the overall structure diagram of the liquid phase hot pressing sintering mold of the utility model；
Fig. 2 is the explosive view of Fig. 1；
Each label is expressed as in figure：
1- first pressure part, the first compression end of 11-, the first pressure transmission of 12- end, 2- pressure piece protection gasket, 3- pressure piece are attached
Shimming, 4- limit sleeve, the first body of 41-, the second body of 42-, 5- second pressure part, the second compression end of 51-, 52- second are passed
Pressure side；
The utility model is illustrated below in conjunction with specification drawings and specific embodiments.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " up, down, left, right, before and after " is logical
Often correspond to the up, down, left, right, before and after of vehicle, wherein " upper and lower " to correspond to vertical direction or short transverse, " left and right "
Corresponding to transverse direction, wherein " ascending, descending " refers to the movement of corresponding component in the vertical direction upward or downward.But it is above-mentioned
The noun of locality is only used for the explanation and illustration disclosure, is not limited to.For example, hereinafter, the first body 41 is also known as inner sleeve,
Second body 42 is also known as housing, and first pressure part 1 also becomes seaming chuck, and second pressure part 5 is also known as push-down head, and pressure piece is protected
Protection pad piece 2 is also known as up/down pressure head gasket, and pressure piece additional spacer 3 is also known as intermediate washer, 12 He of first pressure part pressure transmission end
Second pressure part pressure transmission end 52 is also known as up/down pressure head boss.
In conjunction with Fig. 1 and 2, the liquid phase hot pressing sintering mold of the utility model, including limit sleeve 4, limit sleeve 4 include by it is interior to
The first body 41 and the second body 42 that are coaxially arranged outside, the wall thickness of the wall thickness of the first body 41 less than the second body 42；First
Body 41 includes at least two fissions being spliced to form.The liquid phase hot pressing sintering mold of the utility model is being burnt since inner sleeve is thin
In knockout course after knot, inner sleeve can be directly broken into pieces, to take out sample block, thin inner sleeve can easily be broken into pieces, not will lead to big strike
Impulse force is hit, is unlikely to damage sample block and housing；Thin inner sleeve is cheap, protects sample and housing to sacrifice inner sleeve, makes material
The cost of material preparation reduces.In hot pressing, the mechanical pressure of up/down pressure head squeezes powder material toward centre to reach fine and close burning
The effect of knot, material powder thickness under the action of extruding force reduce, and certainly will generate the outside tension of vertical mold inner wall, this
Power is put in acting on first, different surely to bear this tension because inner sleeve is thin, but since inner sleeve is openable and closable and by housing
It fixes, so tension can be released by the gap between at least two split type inner sleeves (such as two semicylinder inner sleeves)
It puts, so that it is transferred to housing, and housing is very thick and solid, it is sufficient to the tension of powder material in hot pressing is born, material powder is by stone
Black paper bag is wrapped up in thus will not be exosmosed at two semicolumn inner sleeve gaps.
The outer wall of first body 41 is bonded setting with the inner wall of the second body 42, and 41 inner cavity of the first body is cylindrical cavity
Body, the bus of the binding face of 42 inner wall of 41 outer wall of the first body and the second body are in intersect with the bus of 41 inner cavity of the first body
Line.For example, outer wall of inside race and outer casing inner wall be it is horn-like, the internal jacket wall of overcoat wall originally has a vertical wall surface inwardly
Support force and the stiction downward along wall surface, both power are decomposed into horizontal power inwardly, thus to resistance tension
Favorably.In addition, horn-like may make inner sleeve to be easily inserted into housing.
Than structure as illustrated in the drawing, the outer wall of the first body 41 is bonded setting, first set with the inner wall of the second body 42
The longitudal section of the outer wall of body 41 be it is trapezoidal, the longitudal section of the inner wall of the first body 41 is rectangle, the outer wall of the second body 42
Longitudal section is rectangle, and the longitudal section of the inner wall of the second body 42 is trapezoidal to be bonded with the first body 41.For example, housing is one
A heavy wall cylindrical body cylinder, uniform external diameter and internal diameter is with a narrow upper and lower width horn-like, the outer diameter of housing is 126mm；In top
Diameter is 54mm, and bottom end internal diameter is 50.8mm, and housing height is 85~100mm.Inner sleeve is openable and closable cylinder-like part, by two
Thin-walled semicylinder cylinder is composed, and internal diameter is uniform and outer diameter is with a narrow upper and lower width horn-like, i.e., under inner diameter wall is presented slightly
Carefully, the internal diameter of the outer diameter with housing of inner sleeve is equal in any height, and the top outer diameter of inner sleeve is 54mm, and bottom end outer diameter is
50.8mm；The internal diameter of inner sleeve is 46mm, and inner sleeve height is 85~100mm.
The wall thickness of second body 42 is 8~10 times of the wall thickness of the first body 41.Inner sleeve is very thin, demoulding after sintering
Cheng Zhong can directly break inner sleeve into pieces, and to take out sample block, thin inner sleeve can easily be broken into pieces, not will lead to big percussion impulse force, be unlikely to
Damage sample block and housing；Thin inner sleeve is cheap, protects sample and housing to sacrifice inner sleeve, the cost drop for preparing material
It is low.
Mold further includes the first pressure part 1 and second pressure part 5 that 4 end of limit sleeve is arranged in, first pressure part 1 and
Two pressure pieces 5 give sample pressing force to be sintered in the end of limit sleeve 4, realize hot pressed sintering.
Further include pressure piece protection gasket 2, pressure piece protect the setting of gasket 2 first pressure part 1 or second pressure part 5 with
Sample room to be sintered, it is the discoid sheet body that edge has bulge loop that pressure piece, which protects gasket 2,.Upper and lower pressure head is nested respectively to be entered
In the boss ring of upper and lower pressure head gasket, there is the interval of 2mm with interior inner room, therefore will not bond together with interior jacket wall；Up/down
The boss ring of pressure head gasket can stop liquid phase under high temperature to be penetrated into hot pressing, therefore up/down pressure head is isolated with raw material completely.
Therefore, the protection that up/down pressure head improves, and to belong to cost in entire mold higher for up/down pressure head.Upper and lower pressure head pad
The shape and size of piece are identical, and cylinder plate connects a boss ring, and the diameter of cylinder plate is 46mm, thickness 5mm；It is convex
Platform ring outer diameter 46mm, internal diameter 42mm, thickness 2mm.
At least one pressure piece additional spacer 3 is also set up in pressure piece protection gasket 2 and sample room to be sintered, pressure piece is attached
Shimming 3 is discoid sheet body.Thickness that can be different according to sample, between green body and both ends pressure head plus different number and different thickness
The pressure piece additional spacer 3 of degree, to guarantee that seaming chuck has enough displacements, and push-down head is fixed, and guarantees sample being pressed into reason
Thickness is thought to obtain closely knit structure；Moreover, pressure piece additional spacer 3 increase up/down pressure head and sample room to be sintered away from
From further avoiding sample material powder and be bonded with/push-down head；Entire mould structure is simple, low in cost, easy to operate letter
It is clean.Intermediate washer is cylinder plate, diameter 46mm, 3~5mm of thickness.
The height of first pressure part 1 is greater than the height of second pressure part 5.During hot pressed sintering, second pressure part 5
Be it is fixed, offer pressure is moved down by first pressure part 1, if the space that second pressure part 5 occupies in inner sleeve is too many,
It will form space waste, cause the parking space of green body small, and the higher-height first pressure part 1 in pressure transmission end can satisfy difference
The depression distance requirement of height, guarantees to give enough down force pressures to the green body to be pressed of different-thickness；For example, first
The height of pressure piece 1 is 2 times of 5 height of second pressure part, both can guarantee enough green body placement spaces, moreover it is possible to guarantee entire the
One pressure piece 1 can give green body enough pressure, guarantee production performance requirement.
First pressure part 1 includes the first compression end 11 and the first pressure transmission end 12, and second pressure part 5 includes the second compression end 51
With the second pressure transmission end 52, the first compression end 11 and the second compression end 51 are discoid pieces, the first pressure transmission end 12 and the second pressure transmission end
52 be cylindrical member；The height at the first pressure transmission end 12 is greater than the height at the second pressure transmission end 52.For example, the shape phase of upper and lower pressure head
Together, cylinder plate connects a boss, and the cylinder plate of the two and the diameter of boss are equal in whole thickness.Cylinder plate
Diameter is 126mm, thickness 25mm；The diameter of the boss of seaming chuck is 42mm, thickness 40mm；The diameter of the boss of push-down head is
42mm, thickness 20mm.Second pressure part 5 be it is fixed different, offer pressure is moved down by first pressure part 1, if second pressure
The space that second pressure transmission end 52 of part 5 occupies in inner sleeve is too many, will form space waste, causes the parking space of green body small,
And higher-height first pressure transmission end 12 can satisfy the depression distance requirement of different height, guarantee to different-thickness to
Pressing blank gives enough down force pressures.
Die-filling process：Inner sleeve and housing are nested together, (lubrication is played in one layer of BN of inner surface of inner race brushing and isolation is former
The effect of material), graphite paper is rolled into the cylinder that diameter is equal to inner sleeve internal diameter, then be close to inner surface of inner race；By push-down head level
Place, boss upward, push head gasket boss ring be nested on the boss of push-down head downward, then by push-down head boss together with
Pushing head gasket, nesting enters in inner sleeve together；1~2 intermediate washer is placed on pushing head gasket；In uppermost centre
One layer of BN is brushed in gasket upper surface, then is close to a circular graphitic paper；Then powder material is inserted into inner sleeve, by powder material
Filling is uniformly closely knit and flattens, then a circular graphitic paper is placed on powder surface, and 1~2 centre is placed on graphite paper
Gasket, the intermediate washer lower surface for being close to graphite paper are painted with one layer of BN；Seaming chuck gasket is placed on intermediate washer, it is convex
Upward, by seaming chuck boss, nesting enters in seaming chuck boss ring platform ring downward.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (9)
1. a kind of liquid phase hot pressing sintering mold, which is characterized in that including limit sleeve (4), the limit sleeve (4) include by it is interior to
The first body (41) and the second body (42) that are coaxially arranged outside, the wall of the wall thickness of the first body (41) less than the second body (42)
It is thick；
First body (41) includes at least two fissions being spliced to form.
2. liquid phase hot pressing sintering mold according to claim 1, which is characterized in that the outer wall and second of the first body (41)
The inner wall of body (42) is bonded setting, and the first body (41) inner cavity is circular cylindrical cavity, the first body (41) outer wall and second set
The bus of the binding face of body (42) inner wall and the bus of the first body (41) inner cavity are in cross spider.
3. liquid phase hot pressing sintering mold according to claim 1, which is characterized in that the outer wall and second of the first body (41)
The inner wall of body (42) is bonded setting, the longitudal section of the outer wall of the first body (41) be it is trapezoidal, the inner wall of the first body (41)
Longitudal section is rectangle.
4. liquid phase hot pressing sintering mold according to claim 1 to 3, which is characterized in that the wall thickness of the second body (42)
It is 8~10 times of the wall thickness of the first body (41).
5. liquid phase hot pressing sintering mold according to claim 1 to 3, which is characterized in that the mold further includes setting
Set the first pressure part (1) and second pressure part (5) in the limit sleeve (4) end, first pressure part (1) and second pressure part
(5) sample pressing force to be sintered is given in the end of limit sleeve (4).
6. liquid phase hot pressing sintering mold according to claim 5, which is characterized in that it further include pressure piece protection gasket (2),
Pressure piece protects gasket (2) setting in first pressure part (1) or second pressure part (5) and sample room to be sintered, pressure piece protection
Gasket (2) is the sheet body that edge has bulge loop.
7. liquid phase hot pressing sintering mold according to claim 6, which is characterized in that pressure piece protection gasket (2) with to
At least one pressure piece additional spacer (3) is also set up between sintered sample, pressure piece additional spacer (3) is discoid sheet body.
8. liquid phase hot pressing sintering mold according to claim 5, which is characterized in that the height of first pressure part (1) is greater than
The height of second pressure part (5).
9. liquid phase hot pressing sintering mold according to claim 5, which is characterized in that first pressure part (1) is held including first
Pressure side (11) and the first pressure transmission end (12), second pressure part (5) include the second compression end (51) and the second pressure transmission end (52), first
Compression end (11) and the second compression end (51) are discoid pieces, and the first pressure transmission end (12) and the second pressure transmission end (52) are column
Part；
The height at the first pressure transmission end (12) is greater than the height at the second pressure transmission end (52).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820593135.7U CN208166867U (en) | 2018-04-24 | 2018-04-24 | A kind of liquid phase hot pressing sintering mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820593135.7U CN208166867U (en) | 2018-04-24 | 2018-04-24 | A kind of liquid phase hot pressing sintering mold |
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| CN208166867U true CN208166867U (en) | 2018-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333418A (en) * | 2020-04-21 | 2020-06-26 | 包头稀土研究院 | Special sintering container for ceramic, application and preparation method of ceramic |
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2018
- 2018-04-24 CN CN201820593135.7U patent/CN208166867U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333418A (en) * | 2020-04-21 | 2020-06-26 | 包头稀土研究院 | Special sintering container for ceramic, application and preparation method of ceramic |
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