CN106671266B - A kind of alternately molding prepares the method and its mold of slight ceramic tube green body - Google Patents
A kind of alternately molding prepares the method and its mold of slight ceramic tube green body Download PDFInfo
- Publication number
- CN106671266B CN106671266B CN201710026886.0A CN201710026886A CN106671266B CN 106671266 B CN106671266 B CN 106671266B CN 201710026886 A CN201710026886 A CN 201710026886A CN 106671266 B CN106671266 B CN 106671266B
- Authority
- CN
- China
- Prior art keywords
- boss
- internal model
- external mold
- green body
- ceramic tube
- 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.)
- Expired - Fee Related
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 172
- 238000000465 moulding Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 47
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 52
- 239000000843 powder Substances 0.000 claims description 40
- 238000002360 preparation method Methods 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 2
- 238000000462 isostatic pressing Methods 0.000 abstract description 11
- 238000009747 press moulding Methods 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 15
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 15
- 238000005245 sintering Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004421 molding of ceramic Methods 0.000 description 3
- 229910003978 SiClx Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910002106 crystalline ceramic Inorganic materials 0.000 description 1
- 239000011222 crystalline ceramic Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/76—Moulds
- B28B21/82—Moulds built-up from several parts; Multiple moulds; Moulds with adjustable parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/86—Cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/90—Methods or apparatus for demoulding or discharging after shaping
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The present invention provides mold and its application method that a kind of alternately molding prepares slight ceramic tube green body, overcome the problems, such as that conventional press moulding mode exists when preparing slight ceramic tube in the prior art, i.e.,：Unidirectionally, two-way molding is difficult to prepare slight ceramic tube, and isostatic pressing for slight ceramic tube there are complex process, the period is long, of high cost the problems such as.Preparing slight ceramic tube green body using this method has many advantages, such as that simple for process, the period is short, at low cost, and the ceramic pipe component micro-structure being burnt into uniformly, excellent in mechanical performance and stabilization.
Description
Technical field
The present invention relates to a kind of methods preparing slight ceramic tube green body, and in particular to a kind of side of slight ceramic tube green body
Method and its mold, belong to technical field of material.
Background technology
Ceramic forming technique is one of important procedure prepared by ceramic material, it is that ceramic powder is transformed into certain
The process of shape and intensity green body.
Molding is a kind of common and effective ceramic body forming technique, including single way stempressing, two-way molding and isostatic pressed 3
Kind form.Since the molding ceramic body stress gradient of single way stempressing is big, it is only used for preparing that size is small, ceramics of simple shape
Component, for example, prepare in all kinds of scientific experiments the short cylindrical sample of intensity test, bending strength test strip sample,
The circular disc test specimen etc. of dielectric constant test.Two-way molding is developed on the basis of single way stempressing, although can be in certain journey
The stress gradient that ceramic body is reduced on degree, improves the mechanical property of ceramic component and improves micro-structure, but two-way molding is still
It is only applicable to prepare that size is small, ceramic component of simple shape.
Isostatic pressed is a kind of very important ceramic forming technique, compared with unidirectional and two-way molding, using isostatic pressed at
The ceramic body density height of type, micro-structure are uniform, are highly suitable for preparing the ceramic pipe component of big L/D ratio, such as：Vacuum is gone out
The aluminium oxide or zirconia ceramics that arc ceramic tube, thermocouple protection porcelain bushing, higfh-tension ceramics insulation tube, oil drilling use
The porous ceramic pipe etc. that pipe, the crystalline ceramics casing that uses of high-pressure sodium lamp, high temperature fume dust removal desulfurization use.
Patent " internal pressure isostatic pressing method and molding die of porous ceramic pipe " (application number：
CN200910231554.1 a kind of side of interior platen press isostatic pressing high temperature fume dust removal desulfurization porous ceramic pipe) is disclosed
Method.It can be small to 3mm hereinafter, blank has table up to 1500mm, pipe thickness using the molding tubular ceramic billet length of this method
The characteristics of face is bright and clean, straightness is good, size is accurate, consistency is uniform, intensity is high, easy mold release, high yield rate.
Patent " a kind of slight ceramic tube and its method for shaping " (application number：CN200810029132.1 it) discloses a kind of thin
The forming method of long ceramic tube green body.This method utilizes dedicated flexible die, inside and outside to ceramic powder to pressurize simultaneously, and actually one
Kind isostatic pressing method.The slight ceramic tube prepared using this method has the characteristics that consistency is high, circularity is good, can be used for various thin
The preparation of long ceramic tube.
Patent " cold isostatic compaction mould of ceramic cartridge " (CN02258101.4) discloses a kind of the cold etc. of ceramic tube
Hydrostatic profile mold.Using this formed in mould ceramic tube blank strength is high, machinability is good, small, firing is shunk in sintering warpage
Ceramic tube micro-structure dense uniform afterwards, high mechanical strength.
So far, isostatic pressed indeed becomes the important forming technique for preparing slight ceramic tube, about ceramic tube isostatic pressed
The report of forming method and mold has many.
However, when using isostatic pressing technology forming ceramic pipe body, must first be designed according to the shape and size of ceramic tube
Go out corresponding rubber mold, then prepared rubber mold using injection molding machine, finally encapsulates prepared ceramic powder
In rubber mold, and by the molding of isostatic pressing machine completion ceramic tube green body.Due to the design and injection molding price of rubber mold
High, isostatic pressing machine involves great expense use cost height, therefore is although had excellent performance using the standby slight ceramic tube of isostatic pressing, but
There are complex process, the period is long, of high cost the problems such as.
Invention content
In order to overcome the problems, such as that conventional press moulding mode exists when preparing slight ceramic tube in the prior art, i.e.,：Unidirectionally, double
Be difficult to prepare slight ceramic tube to molding, and isostatic pressing for slight ceramic tube there are complex process, the period it is long, of high cost etc.
Problem.In view of the above problems, the present invention provides mold and its users that a kind of alternately molding prepares slight ceramic tube green body
Method, preparing slight ceramic tube green body using this method has many advantages, such as that simple for process, the period is short, at low cost, and the ceramics being burnt into
Pipe component micro-structure uniformly, excellent in mechanical performance and stabilization.
A kind of alternately molding prepares the mold of slight ceramic tube green body, including inner core 1, sleeve 2, pedestal 3, external mold 4, internal model
5, cavity 7 is fed,
Wherein, pedestal 3 is circular pan-like structure, and bottom is plane, and limit protrusion 3- is formed with along 3 circular edges of pedestal edge
The internal diameter of 2, circular ring shape limit protrusion 3-2 are identical or bigger as the outer diameter of sleeve 2, for sleeve 2 to be inserted and limit；Institute
It states 3 center of pedestal and is equipped with through-hole 3-1, the internal diameter of through-hole 3-1 is identical or bigger as the diameter of inner core 1, for inserting the inner core 1
Enter and limits；
Inner core 1 is cylinder, is fixedly installed in vertically in the through-hole 3-1 of the pedestal 3, the horizontal cross-section of the inner core 1
Diameter it is identical as the internal diameter of ceramic tube green body；
The sleeve 2 is hollow cylindrical cylinder, and the inboard, upright of the circular ring shape limit protrusion 3-2 on the pedestal 3 is solid
Dingan County is loaded on the pedestal 3, and its internal diameter is identical as the outer diameter of ceramic tube green body；
External mold 4 is hollow cylindrical cylinder, is fixedly installed in vertically on the pedestal 3 along 2 inner surface of the sleeve, and its
Bottom is formed with inwardly projecting one 4-1 of boss of a circle, outer diameter and the sleeve 2 of the one 4-1 above sections of boss of the external mold 4
Internal diameter it is identical or smaller, the average value of the internal diameter of one 4-1 of the boss slightly larger than 1 diameter of internal diameter and inner core of the sleeve 2；
Internal model 5 is hollow cylindrical cylinder, is vertically arranged on the pedestal 3 along 1 outer surface of the inner core, and its bottom
It is formed with outwardly projecting two 5-1 of boss of a circle, the internal diameter of the internal model 5 is identical or bigger as the diameter of inner core 1, the internal model 5
The outer diameter of two 5-1 of bottom boss is slightly less than the internal diameter of one 4-1 of boss so that one 4-1 of boss and two 5-1 clearance fits of boss；
Charging cavity 7 is formed between the outer surface and the inner surface of external mold 4 of the internal model 5；
The upper surface of two 5-1 of one 4-1 of the boss and boss outer surface with the external mold 4,5 vertical direction of internal model respectively
At 100 °~170 ° of angle, and one 4-1 of the boss is identical with the height of two 5-1 vertical directions of boss, bottom water square
To thickness it is identical.
It is preferred that 1 top of the inner core is formed with through-hole, it is inserted into positioning pin 6 in through-hole, the molding of ceramic tube green body is solved and finishes
Afterwards, the problem of inner core 1 is difficult to extract inside ceramic tube green body.
It is preferred that 2 outer surface of the sleeve is fixed using clip, the sleeve 2 is further locked.
It is preferred that the sleeve 2 is smoothly demoulded along the axis quartering after being molded convenient for ceramic tube green body.
It is preferred that the size of the inner core 1, sleeve 2, pedestal 3, external mold 4, internal model 5 can be according to the elongated ceramic pipe of preparation
Body size adjusts.
It is preferred that the inner core 1, sleeve 2, pedestal 3, external mold 4, the inner wall of internal model 5 and/or outer wall do polishing treatment, carry
The high smooth degree with ceramic body contact surface further increases the molding quality of ceramic tube green body.
A method of alternately molding prepares slight ceramic tube green body, and this method uses mold shown in FIG. 1, to ceramic powder
Material is successively molded, and finally prepares elongated ceramic tube green body.
A method of slight ceramic tube green body being prepared using above-mentioned mold, the ceramic powder of preparation is poured into 5 He of internal model
Charging cavity 7 between external mold 4, then includes the following steps：
(A) internal model 5 being lifted up so that two bottoms 5-1 of boss of internal model 5 are higher than one tops 4-1 of boss of external mold 4,
To make the ceramic powder in charging cavity 7 flow into naturally internal model 5 two 5-1 of boss lower section；
(B) and then above internal model 5 apply pressure versus flow and enter the molding of the ceramic powder below two 5-1 of boss of internal model 5, directly
It is displaced downwardly to two bottoms 5-1 of boss of internal model 5 below the upper surface of 4 boss of external mold, one 4-1；
(C) pressure is shed after the completion of the molding of internal model 5, keeps internal model 5 motionless, external mold 4 is lifted up so that external mold 4
One bottoms 4-1 of boss are higher than two tops 5-1 of boss of internal model 5；
(D) and then above external mold 4 apply pressure versus flow and enter the molding of the ceramic powder below one 4-1 of boss of external mold 4, directly
It is displaced downwardly to the bottom of one 4-1 of boss of external mold 4 below the upper surface of 5 boss of internal model, two 5-1；
(E) step (A) (B) (C) (D) is alternately repeated until ceramic tube green body length reaches design length；
In above-mentioned steps, ceramic powder is added into charging cavity 7 in time；
(F) ceramic tube green body is demoulded, keeps internal model 5 and external mold 4 motionless, inner core 1 extracted from ceramic tube green body, then
Internal model 5 and external mold 2 are taken out from sleeve 2, then take out sleeve 2 from pedestal 3 together with ceramic tube green body, it finally will be ceramic
Pipe body takes out from sleeve 2.
It is preferred that internal model 5 or external mold 4 stand 10~20s after lifting, ceramic powder is made to be sufficiently filled under internal model 5 or external mold 4
It is rectangular at cavity in.
It is preferred that pressure 10~20s of constant standing is kept after internal model 5 or the molding to setting position of external mold 4, to improve green body
Molding quality.
Key technology of the present invention is, using the mold of a kind of achievable alternate feed and alternating molding, to ceramic powder
It is successively molded, finally prepares elongated ceramic tube green body.Mould inside has the internal model that can independently move up and down and outer
Mould, the cavity formed above internal model and external mold, using moving alternatively up and down for internal model and external mold, are realized for containing ceramic powder
The downward alternate feed of ceramic powder in cavity is molded with alternating, by continuously carrying out alternately promotion to internal model and external mold and adding
Press operation, until the length of ceramic tube green body stops when reaching requirement.
Mold that the present invention designs and prepare slight ceramic tube green body method using mold alternating molding completely can be with
The preparation that isostatic pressing method is used for elongated tubular product ceramic body is substituted, and the technology for overcoming generally existing in the prior art is asked
Topic, has many advantages, such as that simple for process, the period is short, at low cost, and the ceramic pipe component micro-structure being burnt into is uniform, mechanical property is excellent
It is different and stable.
Description of the drawings
Attached drawing 1 is a kind of mold schematic diagram for replacing molding and preparing slight ceramic tube green body；
Attached drawing 2 is the 1 shape and size schematic diagram of inner core of mold；
Attached drawing 3 is the 2 shape and size schematic diagram of sleeve of mold；
Attached drawing 4 is the 3 shape and size schematic diagram of pedestal of mold；
Attached drawing 5 is the 4 shape and size schematic diagram of external mold of mold；
Attached drawing 6 is the 5 shape and size schematic diagram of internal model of mold；
Attached drawing 7 is the preparation flow figure of slight ceramic tube green body when installing positioning pin；
Attached drawing 8 is the silicon nitride ceramics pipe body photo prepared using method provided by the invention and mold；
Wherein, 1-inner core, 2-sleeves, 3-pedestals, 4-external molds, 5-internal models, 6-positioning pins.
Specific implementation mode
Method embodiment a kind of 1 mold and prepare slight ceramic tube green body using it
A kind of alternately molding prepares the mold of slight ceramic tube green body, including inner core 1, sleeve 2, pedestal 3, external mold 4, internal model
5, positioning pin 6, charging cavity 7,
Wherein, pedestal 3 is circular pan-like structure, and bottom is plane, and limit protrusion 3- is formed with along 3 circular edges of pedestal edge
The internal diameter of 2, circular ring shape limit protrusion 3-2 are identical or bigger as the outer diameter of sleeve 2, for sleeve 2 to be inserted and limit；Institute
It states 3 center of pedestal and is equipped with through-hole 3-1, the internal diameter of through-hole 3-1 is identical or bigger as the diameter of inner core 1, for inserting the inner core 1
Enter and limits；
Inner core 1 is cylinder, is fixedly installed in vertically in the through-hole 3-1 of the pedestal 3, the horizontal cross-section of the inner core 1
Diameter it is identical as the internal diameter of ceramic tube green body；1 top of the inner core is formed with through-hole, and positioning pin 6 is inserted into through-hole；
Sleeve 2 is hollow cylindrical cylinder, and the inboard, upright of the circular ring shape limit protrusion 3-2 on the pedestal 3 fixes peace
Loaded on the pedestal 3, and its internal diameter is identical as the outer diameter of ceramic tube green body；
External mold 4 is fixedly installed in along 2 inner surface of the sleeve on the pedestal 3 vertically for hollow cylindrical cylinder, and its
Bottom is formed with inwardly projecting one 4-1 of boss of a circle, outer diameter and the sleeve 2 of the one 4-1 above sections of boss of the external mold 4
Internal diameter it is identical or smaller, the average value of the internal diameter of one 4-1 of the boss slightly larger than 1 diameter of internal diameter and inner core of the sleeve 2；
Internal model 5 is vertically arranged to along 1 outer surface of the inner core on the pedestal 3 for hollow cylindrical cylinder, and its bottom
It is formed with outwardly projecting two 5-1 of boss of a circle, the internal diameter of the internal model 5 is identical or bigger as the diameter of inner core 1, the internal model 5
The outer diameter of two 5-1 of boss of bottom is slightly less than the internal diameter of one 4-1 of boss so that one 4-1 of boss and two 5-1 clearance fits of boss；
Charging cavity 7 is formed between the internal model 5 and external mold 4；
The upper surface of two 5-1 of one 4-1 of the boss and boss outer surface with the external mold 4,5 vertical direction of internal model respectively
At 100 °~170 ° of angle, and one 4-1 of the boss is identical with the height of two 5-1 vertical directions of boss, bottom water square
To thickness it is identical.
Then, prepared ceramic powder can be poured by 7 top opening of charging cavity, lower end by internal model 5 and external mold 4 it
Between boss carry out clearance fit.
In this example, the inner core 1, sleeve 2, pedestal 3, external mold 4, internal model 5 size can be according to the slight ceramic tube of preparation
Green body size adjusts.
Mold is specially further in this example：
As shown in Figure 1, a kind of alternately molding prepares the mold of slight ceramic tube green body.
As shown in Fig. 2, inner core 1 is an elongated pole, diameter d1Equal to the internal diameter of ceramic tube green body, length h1Than pottery
Porcelain tube green body grows 350~400mm.In order to ensure the molding quality of green body, the surface of inner core need to be smooth as possible, therefore the table of inner core
Face is processed by shot blasting in machining.In addition, at the 20mm of inner core top, there are one the through-holes of a diameter of 10mm, use
In insertion positioning pin 6.
As shown in figure 3, sleeve 2 is an elongated cylinder, length h2It is more slightly longer 30~50mm than ceramic tube green body, internal diameter d2
Equal to the outer diameter of ceramic tube green body, outside diameter d3It is bigger 10~15mm than internal diameter.In order to ensure the molding quality of ceramic tube green body, sleeve
2 inner wall need to be smooth as possible, therefore the inner wall of sleeve 2 is processed by shot blasting in machining.In this example, 2 appearance of the sleeve
Face is fixed using clip, further locks the sleeve 2.In addition, in order to ensure smoothly to demould after ceramic tube green body is molded, this example
It is middle using wire cutting by the quartering in an axial direction of sleeve 2.
As shown in figure 4, pedestal 3 is a circular pan-like structure, height h3For 80~100mm, 3 bottom end of pedestal is plane,
For it to be steadily positioned over operation console.3 center of pedestal is equipped with through-hole 3-1, the internal diameter d of through-hole1' than the diameter d of inner core 11Slightly
Big 0.2~0.5mm, for inner core 1 to be inserted and limit.3 upper end surrounding of pedestal is formed with limit protrusion 3-2, limit protrusion
The height of projection of 3-2 is 20~30mm, internal diameter d3' than the outside diameter d of sleeve 23Bigger 0.2~0.5mm, for sleeve 2 to be inserted into it
In and limit.The outside diameter d of pedestal 34Internal diameter d than limit protrusion 3-23' 20mm or so greatly.
As shown in figure 5, external mold 4 is slim cylindrical structure, length h4Than 2 long 80mm of sleeve or so.In order to meet external mold 4
Cooperation requirement between sleeve 2, the outside diameter d of external mold 42' than the internal diameter d of sleeve 22Small 0.2~0.5mm.In order to reduce molding behaviour
The outer surface of friction when making between external mold 4 and sleeve 2, external mold 4 is processed by shot blasting in machining.The internal diameter d of external mold 45
Compare outside diameter d2' small 10mm or so, inner surface lower end is equipped with one 4-1 of boss, the internal diameter d of one 4-1 of boss6Slightly larger than 2 internal diameter of sleeve
d2With 1 diameter d of inner core1Average value, that is, be slightly larger than (d2+d1)/2.The height h of one 4-1 of boss5For 20~30mm, one 4-1 of boss
Upper surface and external mold 4 inner surface at 150 ° of angle.
As shown in fig. 6, internal model 5 is slim cylindrical structure, length h6Than 4 long 120mm of external mold.In order to meet internal model 5 with
Cooperation requirement between inner core 1, the internal diameter d of internal model 51" than the diameter d of inner core 11Big 0.2~0.5mm.In order to reduce coining operation
When internal model 5 and inner core 1 between friction, the inner surface of internal model 5 is processed by shot blasting in machining.The outside diameter d of internal model 57Than
Internal diameter d1" big 10mm or so, outer surface lower end is equipped with two 5-1 of boss, the outside diameter d of two 5-1 of boss6' than 4 lower end boss of external mold
The internal diameter d of one 4-16Smaller 1~2mm so that two 5-1 of boss is identical as the bottom width of one 4-1 of boss.The height of two 5-1 of boss
Spend h5' equal to the one 4-1 height h of boss of 4 lower end of external mold5, it is similarly 20~30mm.The upper surface of two 5-1 of boss and internal model 5
Outer surface is equally at 150 ° of angle.
The method for preparing slight ceramic tube green body using the alternating molding of above-mentioned mold, this method use mold shown in FIG. 1,
Realization is successively molded ceramic powder, and finally prepares elongated ceramic tube green body.
When uneasiness dress positioning pin 6, operate by the following method,
A method of slight ceramic tube green body being prepared using above-mentioned mold preparation, the ceramic powder of preparation is poured into internal model
Charging cavity 7 between 5 and external mold 4, then includes the following steps：
Internal model 5 is lifted up so that top of two bottoms 5-1 of boss of internal model 5 higher than one 4-1 of boss of external mold 4, from
And make the ceramic powder in charging cavity 7 flow into naturally internal model 5 two 5-1 of boss lower section；
Then above internal model 5 apply pressure versus flow enter internal model 5 two 5-1 of boss lower section ceramic powder molding, directly
It is displaced downwardly to two bottoms 5-1 of boss of internal model 5 below the upper surface of one 4-1 of boss of external mold 4；
Pressure is shed after the completion of the molding of internal model 5, keeps internal model 5 motionless, external mold 4 is lifted up so that the boss of external mold 4
Top of the bottom of one 4-1 higher than two 5-1 of boss of internal model 5；
Then apply pressure versus flow above external mold 4 and enter the molding of the ceramic powder below one 4-1 of boss of external mold 4, until
The bottom of one 4-1 of boss of external mold 4 is displaced downwardly to below the upper surface of 5 boss of internal model, two 5-1；
Above-mentioned steps are alternately repeated until ceramic tube green body length reaches design length；
In above-mentioned steps, the ceramic powder fed in cavity 7 adds in time；
Ceramic tube green body is demoulded, keeps internal model 5 and external mold 4 motionless, inner core 1 is extracted from ceramic tube green body, then will
Internal model 5 and external mold 2 take out from sleeve 2, then take out sleeve 2 from pedestal 3 together with ceramic tube green body, finally by ceramic tube
Green body takes out from sleeve 2.
When above-mentioned steps operate, internal model 5 or external mold 4 stand 10~20s after lifting, and ceramic powder is made to be sufficiently filled to internal model
5 or the cavity that is formed of the lower section of external mold 4 in.
When above-mentioned steps operate, pressure 10~20s of constant standing is kept after internal model 5 or the molding to setting position of external mold 4, from
And improve the molding quality of green body.
Further, to solve the problems, such as that inner core 1 is difficult to extract inside ceramic tube green body after the molding of ceramic tube green body, installation
Positioning pin 6 simultaneously operates as follows, as shown in Figure 7.
The charging cavity 7 that ceramic powder pours into internal model 5 and external mold 4 is formed will be prepared.
Internal model 5 is lifted up certain altitude, then applies two 5-1 of boss that pressure versus flow enters internal model 5 above internal model 5
The ceramic powder of lower section is molded.As shown in Fig. 7 (a), can smoothly it be flowed into ensure to feed the ceramic powder in cavity 7
Below two 5-1 of boss of internal model 5, the upper surface for lifting height and must be over one 4-1 of boss of external mold 4 of internal model 5, and internal model
5 lift higher, and ceramic powder more easily flows into below boss two 5-1 of internal model 5.As shown in Fig. 7 (b), in order to ensure green body
Molding quality, for internal model 5 when to ceramic powder is molded below, the bottom end of 5 boss of internal model, two 5-1 is slightly below external mold 4
The upper surface of one 4-1 of boss.Therefore, the height that lifts of internal model 5 also should not be excessively high before this.Consider above-mentioned two situations, it is interior
Mould 5 lifts height generally to be more than 4 boss of external mold, one 10~20mm of the upper surfaces 4-1, and the determination of specific height also needs in
Cubical contraction and molding pressure after the boss height of mould 5 and external mold 4, the mobility of ceramic powder, ceramic powder molding
Etc. factors be adjusted.Meanwhile internal model 5 lifts to setting height, first stands 10~20s, then carries out pressurized operation again；For
Ensure the molding quality of green body, when internal model 5 is forced into final pressure, then first 10~20s of pressurize carries out next step behaviour again
Make.
As shown in Fig. 7 (c), internal model 5, by the discharge degree in internal model 5, keeps the position of internal model 5 after molding is completed
It is motionless, external mold 4 is lifted up, external mold 4 lifts two 10~20mm of the upper surfaces 5-1 of boss that height is higher than internal model 5, specific height
Determination equally need to according to the boss height of internal model and external mold, the mobility of ceramic powder, ceramic powder molding after volume receive
Shrinkage and molding pressure are adjusted.Meanwhile external mold 4 is lifting to final height, pressurizes after standing 10~20s
Operation.When pressurization, keep internal model 5 it is motionless, external mold 4 above gradually increase pressure versus flow enter the ceramic powder below external mold 4 into
Row molding.As shown in Fig. 7 (d), when 4 boss of external mold, one bottom ends 4-1 are displaced downwardly to below 5 boss of internal model, two upper surfaces 5-1, stop
External mold 4 is continued to pressurize, and keeps 10~20s of setting pressure.
As shown in Fig. 7 (e), (f), (g), (h), be alternately repeated above-mentioned internal model 5 and external mold 4 lift or coining operation, directly
The position of the positioning pin 6 of 1 top of inner core is reached to 5 top of internal model；Hereafter, when internal model 5 is lifted up, inner core 1 will be with internal model 5 one
With being lifted up, after solving the molding of ceramic tube green body, what inner core 1 was difficult to extract inside ceramic tube green body asks
Topic.
As shown in Fig. 7 (i), internal model 5 and inner core 1 are lifted up simultaneously, are lifted operation and are lifted operation feelings with above-mentioned internal model 5
Condition is identical.It as shown in Fig. 7 (j), keeps the position of inner core 1 constant, applies pressure versus flow only above internal model 5 and enter internal model 5
Two 5-1 of boss below ceramic powder be molded, specific pressurized operation is identical as the coining operation situation of above-mentioned internal model 5.
Internal model 5 and external mold 4 alternately lift and pressurized operation, and ceramic powder in the cavity 7 of observation charging in real time
Amount is added in time, to ensure being smoothed out for alternating coining operation.After the length of ceramic tube green body reaches setting value, stop
To internal model 5 and external mold 4 lift and pressurized operation, prepare demoulding.
When ceramic tube green body demoulds, first keeps internal model 5 and external mold 4 motionless, inner core 1 is extracted from green body, it then will be interior
Mould 5 and external mold 4 take out from sleeve 2, and sleeve 2 is taken out from pedestal 3 together together with ceramic tube green body, unclamp 2 appearance of sleeve
The clip in face is inserted the blade into the axial slits of sleeve 2 and is gently agitated, and the quarter of sleeve 2 is removed one by one, ceramic pipe
The stripping operation of body is completed.
The present embodiment reference literature " X.M.Li, P.T.Wu, D.L.Zhu, The effect of the
crystallization of oxidation-derived SiO2 on the properties ofporous Si3N4-
SiO2 ceramics synthesized by oxidation.Ceramics International.40(2014)4897-
The raw material of silicon nitride ceramics disclosed in 4902. " is prepared and sintering process, to prepare length as 600mm, outer diameter 80mm,
For internal diameter is the silicon nitride ceramics pipe of 40mm.
According to the size requirement of this example silicon nitride ceramics pipe body, each component of mold shown in FIG. 1 is further specific.
1, the length of inner core 1 is 950mm, and a diameter of 40mm, top through-hole diameter is 10mm, and a length is inserted into through hole
For the positioning pin 6 of 50mm.
2, the length of sleeve 2 is 640mm, internal diameter 80mm, outer diameter 92mm.
3,3 height of pedestal is 80mm, a diameter of 100mm of pedestal 3, the 3 a diameter of 40.5mm of central through hole 3-1 of pedestal, bottom
Limit protrusion 3-2 internal diameters on seat are 92.5mm, are highly 30mm.
4, the height of external mold 5 is 720mm, outer diameter 79.5mm, internal diameter 70mm, the internal diameter of 5 lower end boss of external mold, two 5-1
For 61mm, two 5-1 height of boss is 20mm.
5, the height of internal model 4 is 840mm, internal diameter 40.5mm, outer diameter 50mm, the outer diameter of 4 lower end boss of internal model, one 4-1
Height for 59mm, one 4-1 of boss is 20mm.
The further concrete operations that slight ceramic tube green body is prepared using the specific mold are as follows,
The silicon nitride ceramics powder of preparation is poured into charging cavity 7, following alternating coining operation is started,
Internal model 5 is lifted up after 27mm and stands 20s, is then gradually pressurizeed downwards by 5 upper end of internal model, keeps internal model 5 downward
It is mobile, when internal model 5, which moves down distance, reaches 8mm, stop pressurization, keeps current pressure 20s.At this time under 5 boss of internal model, two 5-1
End face is located exactly at the lower section 1mm of 4 boss of external mold, one upper surfaces 4-1.
It will be applied to the discharge degree of 5 upper end of internal model, external mold 4 is lifted up after 53mm and stands 20s, then by external mold 4
Upper end is gradually pressurizeed downwards, and external mold 4 is made to move down, and when external mold 4, which moves down distance, reaches 15mm, is stopped pressurization, is kept
Current pressure 20s.The lower face of 4 boss of external mold, one 4-1 is located exactly at the lower section 1mm of 5 boss of internal model, two upper surfaces 5-1 at this time
Place.During being lifted up in external mold 4 and pressurize downwards, internal model 5 remains stationary as.
The discharge degree of 4 upper end of external mold, internal model 5 is lifted up after 54mm and stands 20s, then downward by 5 upper end of internal model
Gradually pressurization, makes internal model 5 move down, and when internal model 5, which moves down distance, reaches 16mm, stops pressurization, keeps current pressure
20s.The lower face of 5 boss of internal model, two 5-1 is located at the lower section 1mm of 4 boss of external mold, one upper surfaces 4-1 at this time.Equally, in internal model
During 5 are lifted up and pressurize downwards, external mold 4 remains stationary as.
Internal model 5 and the alternately above-mentioned promotion of external mold 4 and pressurized operation.Since internal model 5 and external mold 4 are being forced into most final position
When setting, the pressure value being applied on green body is equal, and therefore, it is according to pressure that the alternating of internal model 5 and external mold 4, which moves up and move down height,
What the contact area of the boss lower surface and green body of pressure gauge is shown on machine numerical value and internal model 5 and external mold 4 calculated.Often
When one step promotes operation, the lower face height of 5 boss of internal model, two 5-1 requires more than the upper surface 15mm of 4 boss of external mold, one 4-1, and
The lower face height of 4 boss of external mold, one 4-1 requires more than the upper surface 14mm of 5 boss of internal model, two 5-1；When each step pressurized operation,
It is 16mm that the pressurization of internal model 5, which moves down distance, and it is 15mm that the pressurization of external mold 4, which moves down distance,.
Meanwhile internal model 5 and external mold 4 are alternately promoted with during pressurized operation, are nitrogenized in real time to the charging supplement of cavity 7
Silicon ceramic powder.When the height of silicon nitride ceramics pipe body reaches 610mm, stop promoting the alternating of internal model 5 and external mold 4 and
Pressurized operation.
It keeps internal model 5 and external mold 4 motionless, inner core 1 is extracted from green body, then by internal model 5 and external mold 4 from sleeve 2
It takes out, sleeve 2 is taken out from pedestal 3 together together with silicon nitride ceramics pipe body, the clip of 2 outer surface of sleeve is unclamped, by knife
It gently agitates, sleeve 2 is detached with silicon nitride ceramics pipe body, by the quarter of sleeve 2 in the axial slits of piece insertion sleeve 2
It removes one by one, the demoulding of silicon nitride ceramics pipe body is completed.
Reference literature " X.M.Li, P.T.Wu, D.L.Zhu, The effect of the crystallization of
oxidation-derived SiO2on the properties ofporous Si3N4-SiO2ceramics
Nitrogen disclosed in synthesized by oxidation.Ceramics International.40 (2014) 4897-4902. "
The sintering process of SiClx ceramics is sintered the silicon nitride ceramics pipe body being molded.Nitrogen manufactured in the present embodiment will be used
SiClx ceramic tube green body is put into high temperature furnace, and 1~3h is sintered at 1200~1300 DEG C.Fig. 8 gives to be molded using the present embodiment
Silicon nitride ceramics pipe body photo.After sintering, silicon nitride ceramics pipe is cut into Mechanics Performance Testing sample, in room temperature ring
Mechanics Performance Testing is carried out to sample under border.
Table 1 give silicon nitride ceramics pipe manufactured in the present embodiment bending strength and porosity with sintering temperature and time
Changing rule.It can be seen from the data of table 1 in the case where raw material prepares identical with sintering process, using this reality
Bending strength and the porosity for applying the silicon nitride ceramics pipe of example preparation are suitable with data disclosed in above-mentioned document.Thus it sees,
The present invention replaces the preparation that die pressing can substitute isostatic pressing method for elongated tubular product ceramic body completely.
Table 1：The bending strength and porosity of the silicon nitride ceramics pipe of preparation with sintering temperature and time changing rule
Claims (9)
1. a kind of alternately molding prepares the mold of slight ceramic tube green body, it is characterised in that including inner core (1), sleeve (2), pedestal
(3), external mold (4), internal model (5), charging cavity (7),
Wherein, pedestal (3) is circular pan-like structure, and bottom is plane, and limit protrusion is formed with along the pedestal (3) circular edges edge
(3-2), the internal diameter and the outer diameter of sleeve (2) of circular ring shape limit protrusion (3-2) are identical or bigger, for sleeve (2) to be inserted into it
In and limit；Pedestal (3) center is equipped with through-hole (3-1), and the internal diameter of through-hole (3-1) is identical as the diameter of inner core (1) or omits
Greatly, it is used to that the inner core (1) to be inserted into and be limited；
Inner core (1) is cylinder, is fixedly installed in vertically in the through-hole (3-1) of the pedestal (3), the level of the inner core (1)
The diameter in section is identical as the internal diameter of ceramic tube green body；
The sleeve (2) is hollow cylindrical cylinder, the inboard, upright of the circular ring shape limit protrusion (3-2) on the pedestal (3)
It is fixedly installed on the pedestal (3), and its internal diameter is identical as the outer diameter of ceramic tube green body；
External mold (4) is hollow cylindrical cylinder, and along the sleeve (2), inner surface is fixedly installed in vertically on the pedestal (3), and
Its bottom is formed with the inwardly projecting boss one (4-1) of a circle, the outer diameter of boss one (4-1) above section of the external mold (4) with
The internal diameter of the sleeve (2) is identical or smaller, and the internal diameter of the boss one (4-1) is slightly larger than the internal diameter of the sleeve (2) and interior
The average value of core (1) diameter；
Internal model (5) is hollow cylindrical cylinder, is vertically arranged on the pedestal (3) along the inner core (1) outer surface, and its bottom
Portion is formed with the outwardly projecting boss two (5-1) of a circle, and the internal diameter and the diameter of inner core (1) of the internal model (5) are identical or bigger, institute
The outer diameter for stating internal model (5) bottom boss two (5-1) is slightly less than the internal diameter of boss one (4-1) so that boss one (4-1) and boss two
(5-1) clearance fit；
Charging cavity (7) is formed between the outer surface and the inner surface of external mold (4) of the internal model (5)；
The upper surface of the boss one (4-1) and boss two (5-1) respectively with the external mold (4), internal model (5) vertical direction it is outer
Surface is at 100 °~170 ° of angle, and the boss one (4-1) is identical with the height of boss two (5-1) vertical direction, bottom
The thickness of portion's horizontal direction is identical.
2. a kind of alternately molding according to claim 1 prepares the mold of slight ceramic tube green body, it is characterised in that described
Inner core (1) top is formed with through-hole, and positioning pin (6) is inserted into through-hole.
3. a kind of alternately molding according to claim 2 prepares the mold of slight ceramic tube green body, it is characterised in that described
Sleeve (2) outer surface is fixed using clip.
4. a kind of alternately molding according to claim 3 prepares the mold of slight ceramic tube green body, it is characterised in that described
Sleeve (2) is along the axis quartering.
5. a kind of alternately molding prepares the mold of slight ceramic tube green body according to any one of claims 1-4, special
Sign be the inner core (1), sleeve (2), pedestal (3), external mold (4), internal model (5) size can be according to the slight ceramic tube of preparation
Green body size adjusts.
6. a kind of alternately molding according to claim 5 prepares the mold of slight ceramic tube green body, it is characterised in that described
Inner core (1), sleeve (2), pedestal (3), external mold (4), internal model (5) inner and outer wall do polishing treatment.
7. a kind of method preparing slight ceramic tube green body using mold described in claim 1, the ceramic powder of preparation is poured into
Charging cavity (7) between internal model (5) and external mold (4), it is characterised in that further comprising the steps of：
(A) internal model (5) is lifted up so that bottom boss two (5-1) of internal model (5) is higher than the boss one (4-1) of external mold (4)
Top, to make the ceramic powder in charging cavity (7) flow into naturally internal model (5) boss two (5-1) lower section；
(B) and then above internal model (5) apply pressure versus flow and enter the molding of the ceramic powder below the boss two (5-1) of internal model (5),
Until bottom boss two (5-1) of internal model (5) is displaced downwardly to below the upper surface of external mold (4) boss one (4-1)；
(C) pressure is shed after the completion of internal model (5) molding, keeps internal model (5) motionless, external mold (4) is lifted up so that external mold
(4) bottom boss one (4-1) is higher than top boss two (5-1) of internal model (5)；
(D) and then above external mold (4) apply pressure versus flow and enter the molding of the ceramic powder below the boss one (4-1) of external mold (4),
Until the bottom of the boss one (4-1) of external mold (4) is displaced downwardly to below the upper surface of internal model (5) boss two (5-1)；
(E) step (A) (B) (C) (D) is alternately repeated until ceramic tube green body length reaches design length；
In above-mentioned steps, ceramic powder is added into charging cavity (7) in time；
(F) ceramic tube green body is demoulded, keeps internal model (5) and external mold (4) motionless, inner core (1) extracted from ceramic tube green body, so
Internal model (5) and external mold (2) are taken out from sleeve (2) afterwards, then take sleeve (2) from pedestal (3) together with ceramic tube green body
Go out, finally takes out ceramic tube green body from sleeve (2).
8. according to the method described in claim 7, it is characterized in that internal model (5) or external mold (4) stand 10~20s after lifting.
9. according to the method described in claim 8, it is characterized in that being kept after internal model (5) or external mold (4) molding to setting position
10~20s of the constant standing of pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710026886.0A CN106671266B (en) | 2017-01-14 | 2017-01-14 | A kind of alternately molding prepares the method and its mold of slight ceramic tube green body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710026886.0A CN106671266B (en) | 2017-01-14 | 2017-01-14 | A kind of alternately molding prepares the method and its mold of slight ceramic tube green body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106671266A CN106671266A (en) | 2017-05-17 |
| CN106671266B true CN106671266B (en) | 2018-10-30 |
Family
ID=58859027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710026886.0A Expired - Fee Related CN106671266B (en) | 2017-01-14 | 2017-01-14 | A kind of alternately molding prepares the method and its mold of slight ceramic tube green body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106671266B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108995014B (en) * | 2018-03-26 | 2023-08-15 | 吉林大学 | Spiral tube type ceramic blank preparation mold and method |
| CN110385773B (en) * | 2019-08-29 | 2024-05-17 | 济源市东方自动化设备有限公司 | Ceramic rod cage type pressing die assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1529836B1 (en) * | 1967-07-19 | 1970-06-25 | ||
| DE19722779A1 (en) * | 1997-06-02 | 1998-12-03 | Hoechst Ag | Shaped body made of textured superconductor material and process for its production |
| CN102172975A (en) * | 2011-02-18 | 2011-09-07 | 山东合创明业精细陶瓷有限公司 | Mould for preparing ceramic cartridge and method for preparing ceramic cartridge by utilizing same |
-
2017
- 2017-01-14 CN CN201710026886.0A patent/CN106671266B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106671266A (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5043123A (en) | Method and apparatus for manufacturing finished parts as composite bodies from pulverulent rolling materials | |
| CN110216778B (en) | Die-casting equipment for ceramic plate production and use method thereof | |
| CN106671266B (en) | A kind of alternately molding prepares the method and its mold of slight ceramic tube green body | |
| EP1705680B1 (en) | Method for molding a ceramic discharge vessel and removing the core, and the core | |
| US3499066A (en) | Method for manufacturing isostatically pressed articles having openings or inserts therein | |
| US11998985B2 (en) | Use of a deformable interface for the fabrication of complex parts | |
| CN107498038B (en) | Multi-cavity pressureless sintering graphite die | |
| CN204844461U (en) | Pressure slip casting mould of tubulose pottery target | |
| CN101655089B (en) | Ceramic rotor of energy recovery pump and preparation method thereof | |
| CN108889953B (en) | Preparation method of large-porosity porous tungsten tube | |
| DE69915422T2 (en) | Process for the production of complex shaped hollow ceramic bodies | |
| CN205735429U (en) | A kind of shaped device for pottery bending strength test sample | |
| CN204725627U (en) | A kind of gel casting forming prepares the mould of large scale tubulose green compact | |
| CN218611681U (en) | Sintering mould convenient to drawing of patterns | |
| RU2374069C1 (en) | Device for clayware formation from aqueous slip | |
| US7323134B2 (en) | Method of forming inert anodes | |
| CN102172973B (en) | Special die for long bar ceramic blank bottom-pouring liquid lifting gel casting and preparation method for producing long bar ceramic by using same | |
| CN110695110B (en) | Crank extrusion forming device easy to demould and crank extrusion forming method | |
| CN205362663U (en) | Crucible drawing of patterns mould | |
| CN104760124A (en) | Preparation method and shaping device of sulfur removal nozzle | |
| RU2482938C1 (en) | Method of forming powder materials with liophobic fluid and device to this end | |
| CN1075678A (en) | Static pressure process of ceramic roll formation and shaping mould thereof | |
| RU2257291C1 (en) | Device for molding ceramic articles of complex configuration from aqueous slips | |
| KR101880293B1 (en) | manufacturing device for sintered product and method for taking out thereof | |
| CN217561074U (en) | Cement clinker lithofacies forming machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |