CN202367205U - Hot-pressing sintering mould - Google Patents
Hot-pressing sintering mould Download PDFInfo
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- CN202367205U CN202367205U CN2011205327030U CN201120532703U CN202367205U CN 202367205 U CN202367205 U CN 202367205U CN 2011205327030 U CN2011205327030 U CN 2011205327030U CN 201120532703 U CN201120532703 U CN 201120532703U CN 202367205 U CN202367205 U CN 202367205U
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- mould
- die
- sleeve
- core
- forming
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Abstract
The utility model discloses a hot-pressing sintering mould, which comprises an upper plunger chip and a lower concave mould which are correspondingly matched for use. The lower concave mould comprises a lower plunger chip and a forming concave mould, and the forming concave mould comprises a mould sleeve and a forming mould core. The center hole of the mould sleeve is in a truncated conical structure with a large upper part and a small lower part, and the forming mould core is inserted into the center hole of the mould sleeve. The middle part of the forming mould core is provided with forming holes which are correspondingly matched with the upper plunger chip and the lower plunger chip in a clearance-inserted mode, and the peripheral surface of the forming mould core is a conical surface which is correspondingly matched with the inner wall surface of the center hole of the mould sleeve. The peripheral surface of the forming mould core is tightly matched with the inner wall surface of the center hole of the mould sleeve, and the bottom surface of the forming mould core in the axial direction is higher than the bottom edge of the center hole of the mould sleeve of the mould sleeve. The forming mould core is formed by at least two separated insert blocks which are distributed along a circumferential direction, the forming holes of the forming mould core are surrounded by all separated insert blocks, and the peripheral surfaces of the separated insert blocks are butted to form the peripheral surface of the forming mould core. The sintering mould effectively solves the problem that a sintered composite material is difficulty to take out from the mould.
Description
Technical field
The utility model belongs to composite powder metallurgy sintering molded technical field, is specifically related to a kind of powder used in metallurgy hot pressed sintering mould.
Background technology
The many employings of Metal Substrate low-expansibility compound material have low granular materials of the coefficient of expansion and plasticity and toughness good metal material and are composited.The particle that the coefficient of expansion is low adopts carborundum (SiC), silica (Si2O3), aluminium nitride (A1N) etc. mostly, and matrix material adopts Alar.The preparation method has powder metallurgic method, the melt infiltration method.And the melt infiltration legal system is equipped with in the process, and the wetability of SiC and aluminium liquid is very poor, though interfacial chemical reaction takes place between SiC particle and the aluminium alloy melt easily, can effectively improve wetability, and its product has a negative impact to performance of composites.So low-expansibility compound material adopts the powder metallurgic method preparation usually, its technology and quality of item are easy to control, and the volume content of particle can be adjusted in the composite, and performance indications are controlled easily.
At present, the powder metallurgic method preparation method has three kinds of preparation technology's schemes: unidirectional compacting base sintering, isostatic cool pressing base sintering and vacuum heating-press sintering.And there is the anisotropy mass defect of microstructure and property in the low-expansibility compound material goods that unidirectional compacting base sintering process obtains; The microstructure of composite density that isostatic cool pressing base sintering process obtains is poor, and the interface combines loose, needs follow-up densified hot-pressing processing, complicated process of preparation, and cost improves, and technological parameter is difficult to control.Thermal pressed sintering molding process is that the powder that is pre-mixed is packed in the mould of integrated heater, is put into to heat on the press device and suppress.The process main feature is compacting and sintering are carried out simultaneously, makes pressed compact near solid density, need can obtain the powdered metal parts of performance.This technology concentrates in the mould carries out, and owing to the liquidus temperature of sintering temperature near aluminium alloy, pressing pressure is bigger, and high temperature and high pressure is had higher requirement to mould structure.The employed graphite jig intensity of tradition is lower, easy of crack in hot pressing, and pressing pressure is lower, and resulting microstructure of composite performance is lower.In order to improve obtained performance of composites, mold material should adopt refractory steel or the heat-resistance stainless steel with higher elevated temperature strength.But the coefficient of expansion of composite is lower in the hot pressed sintering process; And the mould steel or the stainless coefficient of expansion are bigger; Both coefficients of expansion interlace far away, and the composite after causing hot pressed sintering cooling back mould with sintering tightly binds round extremely, and composite can't take out from mould.
The utility model content
The purpose of the utility model is to provide a kind of hot pressed sintering mould, to solve the technical problem that the composite hoop of hot pressed sintering mould of the prior art after mould after the cooling is with sintering is dead, be difficult for taking out finished product.
For realizing above-mentioned purpose; The hot pressed sintering mould that the utility model provided adopts following technical scheme: a kind of hot pressed sintering mould; Described mould comprises upper punch and the lower cavity die that corresponding matching is used; Lower cavity die comprises low punch and molding concave die, and molding concave die comprises the die sleeve of the frusto-pyramidal configurations that centre bore is big up and small down and plug the formation die core in the centre bore that is assemblied in die sleeve that the middle part of formation die core has the moulding hole that is used for said upper and lower drift corresponding gap inserting; The outer peripheral face of said formation die core is the taper surface with the corresponding cooperation of internal face of die sleeve centre bore; The internal face tight fit of the outer peripheral face of formation die core and die sleeve centre bore, and die sleeve axially on the bottom surface of formation die core be higher than the edge, base of die sleeve centre bore, said formation die core is formed by being to insert along the split more than three that circumferentially distributes; Inserted by each split and surround in the moulding hole of said formation die core, the outer peripheral face of formation die core is formed in insert outer peripheral face butt joint of each split.
Described die sleeve axially on the bottom of formation die core than the high 1-2mm in the bottom of die sleeve.
The tapering of the centre bore of described die sleeve is 3-5 °.
Described mould also comprises the lower shoe that is used to support die sleeve when using, and said low punch is arranged on the lower shoe.
The beneficial effect of the utility model is: the hot pressed sintering mould that the utility model provided comprises upper punch, low punch and mould; Mould comprises die sleeve and formation die core; The formation die core middle part has the moulding hole; When using above-mentioned sintering mold that low-expansibility compound material is carried out hot pressed sintering, composite is arranged in the moulding hole of formation die core, cooperates the hot pressed sintering of accomplishing composite by upper and lower drift and formation die core.After the composite hot pressed sintering is accomplished; The coefficient of expansion of mould and the coefficient of expansion of composite are inconsistent and cause finished product and formation die core to bond together; But the formation die core in the sintering mold that the utility model provided is inserted by the split more than two and is formed; Like this after forming model is taken out from die sleeve,, thereby realize separating of finished product and formation die core easily with each split separation of inserting.And the centre bore of the die sleeve that the utility model provided is big up and small down frusto-pyramidal configurations; And the bottom of formation die core is higher than the bottom of die sleeve on die sleeve is axial; Like this when upper punch during to the composite punching press; Stamping press can act on the die sleeve through formation die core, at this moment, produces the constraint compression to the composite in the moulding hole that is arranged in formation die core by die sleeve diametrically through formation die core; Improve the density of resulting composite like this, eliminated the anisotropy defective of composite hot pressed sintering finished product.The sintering mold that the utility model provided is easy to manufacture; Dependable performance; Simple to operate, effectively overcome in sintering process because the difficult problem that composite is difficult to from mould, take out behind low-expansibility compound material and the different sintering that cause of the die ontology material coefficient of expansion.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of hot pressed sintering mould of providing of the utility model;
Fig. 2 is the vertical view of Fig. 1.
The specific embodiment
Like Fig. 1, shown in Figure 2, a kind of embodiment of hot pressed sintering mould, the hot pressed sintering mould among this embodiment comprise upper punch 1 and the lower cavity die that corresponding matching is used; Lower cavity die comprises lower bolster 4; Lower bolster is provided with low punch, on lower bolster 4, also is supported with molding concave die, and molding concave die comprises the die sleeve 3 of the frusto-pyramidal configurations that centre bore is big up and small down; When composite is carried out hot pressed sintering; Die sleeve 3 is supported on the lower bolster 4, in the centre bore of die sleeve 3, is equipped with formation die core 2, and the middle part of formation die core 2 has the moulding hole that is used for said upper and lower drift corresponding gap inserting; The outer peripheral face of said formation die core 2 is the taper surface with the corresponding cooperation of internal face of die sleeve centre bore; The internal face tight fit of the outer peripheral face of formation die core 2 and die sleeve 3 centre bores, and die sleeve axially on the bottom surface of formation die core be higher than the edge, base of die sleeve centre bore, the formation die core 2 in the present embodiment 21 is formed by being to insert along three splits that circumferentially distribute; Inserted by each split and surround in the moulding hole of formation die core, the outer peripheral face of formation die core is formed in insert outer peripheral face butt joint of each split.
Preferably, the bottom of the formation die core in the foregoing description is than the high 1-2mm in the bottom of die sleeve.
Preferably, the tapering of the centre bore of the die sleeve in the foregoing description is 3-5 °.
Mould in the foregoing description can adopt refractory steel or heat-resistance stainless steel manufacturing, can in hot pressing, can effectively improve prepared performance of composites like this so that the bulk strength of mould is higher like this
Formation die core in the foregoing description is inserted by three splits and is formed, and in other embodiments, formation die core can be inserted by the split more than three and form, and each split is inserted along circumferentially distributing.
After hot pressed sintering is accomplished, shaping groove to be inverted, the pushing formation die core is so that the composite finished product of formation die core after together with hot pressed sintering is separated with die sleeve, and inserting finished product and split to separate again gets final product.
Claims (4)
1. hot pressed sintering mould; It is characterized in that: described mould comprises upper punch and the lower cavity die that corresponding matching is used; Lower cavity die comprises low punch and molding concave die; Molding concave die comprises the die sleeve of the frusto-pyramidal configurations that centre bore is big up and small down and plugs the formation die core in the centre bore that is assemblied in die sleeve; The middle part of formation die core has the moulding hole that is used for said upper and lower drift corresponding gap inserting, and the outer peripheral face of said formation die core is the taper surface with the corresponding cooperation of internal face of die sleeve centre bore, the internal face tight fit of the outer peripheral face of formation die core and die sleeve centre bore; And the bottom surface of formation die core is higher than the edge, base of die sleeve centre bore on die sleeve is axial; Said formation die core is formed by being to insert along the split more than three that circumferentially distributes, and is inserted by each split and surround in the moulding hole of said formation die core, the insert outer peripheral face of outer peripheral face butt joint composition formation die core of each split.
2. hot pressed sintering mould according to claim 1 is characterized in that: described die sleeve axially on the bottom of formation die core than the high 1-2mm in the bottom of die sleeve.
3. hot pressed sintering mould according to claim 1 and 2 is characterized in that: the tapering of the centre bore of described die sleeve is 3-5 °.
4. hot pressed sintering mould according to claim 3 is characterized in that: described mould also comprises the lower shoe that is used to support die sleeve when using, and said low punch is arranged on the lower shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205327030U CN202367205U (en) | 2011-12-19 | 2011-12-19 | Hot-pressing sintering mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205327030U CN202367205U (en) | 2011-12-19 | 2011-12-19 | Hot-pressing sintering mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202367205U true CN202367205U (en) | 2012-08-08 |
Family
ID=46590929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205327030U Expired - Fee Related CN202367205U (en) | 2011-12-19 | 2011-12-19 | Hot-pressing sintering mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202367205U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464616A (en) * | 2013-08-01 | 2013-12-25 | 浙江恒成硬质合金有限公司 | Split mould |
| CN104070688A (en) * | 2014-06-09 | 2014-10-01 | 中航复合材料有限责任公司 | Mold for forming aircraft composite material scuttle frame by mold pressing technique |
| CN104148630A (en) * | 2014-08-20 | 2014-11-19 | 济南大学 | Vacuum hot pressed sintering mold |
-
2011
- 2011-12-19 CN CN2011205327030U patent/CN202367205U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464616A (en) * | 2013-08-01 | 2013-12-25 | 浙江恒成硬质合金有限公司 | Split mould |
| CN104070688A (en) * | 2014-06-09 | 2014-10-01 | 中航复合材料有限责任公司 | Mold for forming aircraft composite material scuttle frame by mold pressing technique |
| CN104148630A (en) * | 2014-08-20 | 2014-11-19 | 济南大学 | Vacuum hot pressed sintering mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20141219 |
|
| EXPY | Termination of patent right or utility model |