CN104786345B - Automatic pressure casting molding device for preparing ITO green bodies - Google Patents

Automatic pressure casting molding device for preparing ITO green bodies Download PDF

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Publication number
CN104786345B
CN104786345B CN201510146649.9A CN201510146649A CN104786345B CN 104786345 B CN104786345 B CN 104786345B CN 201510146649 A CN201510146649 A CN 201510146649A CN 104786345 B CN104786345 B CN 104786345B
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mould
concavity
concavity body
ito
inner concave
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CN201510146649.9A
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CN104786345A (en
Inventor
杨硕
王政红
师琳璞
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725th Research Institute of CSIC
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725th Research Institute of CSIC
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    • 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
    • B28B1/266—Means for counteracting the pressure being applied on the slip or on the moulded article in the mould, e.g. means for clamping the moulds parts together in a frame-like structure
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/021—Feeding the unshaped material to moulds or apparatus for producing shaped articles by fluid pressure acting directly on the material, e.g. using vacuum, air pressure
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • B28B13/065—Removing the shaped articles from moulds by applying electric current or other means of discharging, e.g. pneumatic or hydraulic discharging 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/006—Pressing by atmospheric pressure, as a result of vacuum generation or by gas or liquid pressure acting directly upon the material, e.g. jets of compressed air
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/26—Assemblies of separate moulds, i.e. of moulds or moulding space units, each forming a complete mould or moulding space unit independently from each other

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Producing Shaped Articles From Materials (AREA)

Abstract

An automatic pressure casting molding device for preparing ITO green bodies comprises air valves, a vacuum pump, drain valves, an air compressor, an automatic casting machine, a pressing machine, a pressing machine shaft, a pressing head, mould frames, outer moulds, inner moulds, a fixing table and a sliding rail. One mould frame, one outer mould and one inner mould form one set of mould, the left end and the right end of the fixing table are fixed on an operation platform through the sliding rail, multiple sets of moulds are arranged on the sliding rail side by side, the right end of pressing head is connected to the pressing machine shaft of the pressing machine, the upper end of each set of the mould is equipped with the air valves, the air valves are connected to the vacuum pump in parallel, the lower end of each set of the mould is equipped with the drain valves, the automatic casting machine leads to the lower end of the green body cavity of each set of the mould, and the air compressor leads into each set of the mould; ITO slurry is pressed in the moulds, most of the water in the ITO slurry is drained from mould micropores, the ITO slurry is continuously supplemented and stacked in the green body cavities to prepare large-standard ITO green bodies, the automatic pressure casting molding device for preparing the ITO green bodies has the advantages that the structure is simple, the operation is convenient, the automation degree is high, and the ITO green bodies are high in density and strength.

Description

A kind of automatic pressure slip casting device for preparing ITO base substrates
Technical field
The invention belongs to casting machine technical field, especially a kind of automatic pressure injection forming for preparing ITO base substrates Device.
Background technology
ITO is the abbreviation title of Tin-doped Indium Oxide, and the implication of ITO refers to a kind of indium tin oxide material Material, ITO base substrates are the base substrates by made by indium tin oxide.
" ceramics " the 7th phase of 2010《High-performance ITO ceramic target material production technology development trend》One is mentioned in one text Plant the technological process of injection forming：With deionized water as solvent, ITO powder is made into slurry, then inject mould under a certain pressure Inside it is allowed to be shaped to base base, but this article does not do excessive introduction to the device for preparing ITO base substrates, and technological process is complicated, automatization's journey Degree is not high, and the blank density of preparation is low, specification is less than normal.
The content of the invention
To solve the above problems, the present invention devises a kind of automatic pressure slip casting device for preparing ITO base substrates, should be certainly Dynamic pressure slip casting device is a kind of combination type casting equipment, mould using bisphenol A-type micropore epoxy resin, Gypsum Fibrosum, quartz, Glass-fiber reinforced polycarbonate composite material makes, by vacuum pump to each mould evacuation, using compressed air as Pressure medium, solid-liquid separation in ITO slurry press-in dies, will be realized and molding through Self-pressurizing agri, prepared by high degree of automation ITO base substrates have that specification is big, density is high, intensity is high, can near-net-shape.
For achieving the above object, the present invention is adopted the following technical scheme that：
A kind of automatic pressure slip casting device for preparing ITO base substrates, the automatic pressure slip casting device comprising air valve, Vacuum pump, drain valve, air compressor machine, automatic grouting machine, press, press axle, pressure head, framed, external mold, internal model, fixed station and slide rail, Wherein framed, external mold and internal model constitute one set of die, and one set of die can prepare an ITO base substrate, the raw material that ITO base substrates are used ITO slurries are prepared by ITO powder body and Jing pressures are into ITO base substrates, the final molding size of ITO base substrates is high Gmm × thickness Hmm × long Lmm, the invention is characterized in that：
Internal model is made up of left inside mould and right internal model, and the left inside mould is the first concavity body that everywhere wall thickness is h, h≤H, The each size of inner concave of the first concavity body is equal with G × H × L respectively, and the overall dimensions of the first concavity body are respectively etc. In high { G+2h } × thick { H+h } × long { L+2h }, the right internal model is in cuboid, and the overall dimensions of the cuboid are respectively equal to High G × thickness h × length { L+2h }, the relatively described cuboid of inner concave of the first concavity body simultaneously has the interior matched moulds be combineding with each other Face；
External mold is made up of left outside mould and right external mold, and the left outside mould is that upper and lower both sides wall thickness is h1And remaining wall thickness is h2The second concavity body, h2＞ h1＞ h, each size of inner concave of the second concavity body is respectively equal to high { G+2h } × thick { H+h } × long { L+2h }, the overall dimensions of the second concavity body are respectively equal to height { G+2h+2h1} × thickness { H+h+h2} × long { L+2h+ 2h2, the right external mold is that upper and lower both sides wall thickness is h3And remaining wall thickness is h4The 3rd concavity body, h4＞ h3＞ h, described The each size of inner concave of three concavity bodies is respectively equal to high G × thickness h × length { L+2h }, the overall dimensions difference of the 3rd concavity body Equal to height { G+2h3} × thickness { h+h4} × long { L+2h+2h4, the overall dimensions of the second concavity body are equal to the 3rd concavity The overall dimensions of body, the inner concave of the relatively described 3rd concavity body of inner concave of the second concavity body simultaneously has what is be combined with each other Outer land area；
Framed to be made up of left mould frame and right mould frame, the left mould frame is that everywhere wall thickness is h5The 4th concavity body, h5≥ h2, each size of the inner concave respectively equal to height { G+2h+2h of the 4th concavity body1} × thickness { H+h+h2} × long { L+2h+2h1, The overall dimensions of the 4th concavity body are respectively equal to height { G+2h+2h1+2h5} × thickness { H+h+h2+h5} × long { L+2h+2h1+ 2h5, the right mould frame is that everywhere wall thickness is h6The 5th concavity body, h6≥h4, each chi of inner concave of the 5th concavity body Very little respectively equal to height { G+2h3} × thickness { h+h4} × long { L+2h+2h4, the overall dimensions of the 5th concavity body are respectively equal to height {G+2h3+2h6} × thickness { h+h4+h6} × long { L+2h+2h4+2h6, the overall dimensions of the 4th concavity body are equal to the described 5th The overall dimensions of concavity body, the inner concave of the relatively described 5th concavity body of inner concave of the 4th concavity body simultaneously has mutually knot The frame land area of conjunction；
The interior land area is respectively superposed and is referred to as land area with the outer land area and the frame land area, will be described The left outside mould is mounted in the 4th concavity body of the left mould frame by left inside mould again after being mounted in the second concavity body of the left outside mould Interior, now the inner concave of the first concavity body is towards the land area；The right internal model is mounted in into the 3rd of the right external mold the After in concavity body the right external mold is mounted in the 5th concavity body of the right mould frame again, the 4th concavity body is interior after assembling The inner concave of the relatively described 5th concavity body of concave surface simultaneously forms one set of die, the inner concave of the first concavity body per mold The cavity formed with the cuboid is called base substrate die cavity；
The fixed station that left and right two ends are respectively provided with is fixed on operating board by the slide rail of several horizontal arrangements, at several The mould that number set placed side by side is assembled on slide rail, the mould at the end that keeps left abuts left end fixed station, and the mould at end of keeping right is against the right side Side pressure head, pressure head right-hand member connection press axle, the centerline of press axle in the symmetrical center line of several mold height, press axle It is connected on press, press is fixed on right-hand member fixed station, in left mould frame described in every mold and the upper end of the right mould frame Air valve is each configured with, the outlet tube of each air valve or the upper end being passed through in the left outside mould or is passed through upper in the right external mold End, all air valves are connected in parallel on vacuum pump；Row is each configured with the lower end of left outside mould described in every mold and the right external mold Water valve, the outlet tube of automatic grouting machine each leads into the lower end of every mold base substrate die cavity, and the outlet tube of air compressor machine each leads into Per left mould frame and the right mould inframe described in mold, and turn in from the middle part of the left mould frame and the right mould frame respectively described The right-hand member of the left end of left outside mould and the right external mold.
The vacuum pressure of above-mentioned vacuum pump is controlled in 200 ~ 1000Pa.
The grouting pressure of above-mentioned automatic grouting machine is controlled in 0.2 ~ 1.3MPa, the flow rate of grouting control of above-mentioned automatic grouting machine System is in 7 ~ 20L/min.
The Stress control of above-mentioned air compressor machine is in 1.8 ~ 3.6MPa.
The left inside mould, the right internal model, the left outside mould, the right external mold, the left mould frame and the right mould frame or It is made by bisphenol A-type micropore epoxy resin, or is made by Gypsum Fibrosum, or is made by quartz, or by Glass-fiber reinforced polycarbonate composite material is made.
Because using techniques described above scheme, the present invention produces following good effect：
1. the automatic pressure slip casting device of the present invention, its simple structure, easy to operate, high degree of automation, prepare ITO base substrates have that specification is big, density is high, intensity is high, close dead size.
2. the automatic pressure slip casting device of the present invention by way of Self-pressurizing agri step by step by higher solids content, stream In the preferable ITO slurries press-in die of dynamic property, the most of moisture in ITO slurries is discharged from mould micropore, and ITO slurries exist Persistently supplement is descended and continuous accumulation molding goes out the uniform big specification ITO base substrate of high density, high intensity in base substrate die cavity, the ITO Base substrate is sintered in oxygen atmosphere stove and big specification, highdensity ITO target is obtained.
Description of the drawings
Fig. 1 is the automatic pressure grouting device structural profile simplified schematic diagram containing three molds.
In Fig. 1：1- air valves；2- vacuum pumps；3- drain valves；4- air compressor machines；5- automatic grouting machines；6- press；7- press axles； 8- pressure heads；9- is framed；10- external molds；11- internal models；12- base substrate die cavities；13- fixed stations；14- slide rails.
Specific embodiment
The present invention is a kind of automatic pressure slip casting device for preparing ITO base substrates.
The automatic pressure slip casting device of the present invention includes air valve 1, vacuum pump 2, drain valve 3, automatically air compressor machine 4, note Pulp grinder 5, press 6, press axle 7, pressure head 8, framed 9, external mold 10, internal model 11, fixed station 13 and slide rail 14, wherein framed 9, external mold 10 and internal model 11 constitute one set of die, one set of die can prepare an ITO base substrate, and the raw material that ITO base substrates are used is by ITO powder body Prepare ITO slurries and Jing pressures prepare ITO base substrates.
The final molding size of ITO base substrates is set as high Gmm × thickness Hmm × long Lmm, with reference to Fig. 1, height is referred to by Fig. 1 Lower size, thick to refer to side-to-side dimensions by Fig. 1, length refers to that depth size does not show in FIG, and remaining wall thickness specifically described herein is referred to Thickness wall thickness and length wall thickness, by the final molding size of ITO base substrates of the present invention 400 × 10 × 500mm can be reached.
The effect of air valve is the branch road for connecting or closing vacuum feed channel into each mould.Vacuum pump is to mould base substrate die cavity Implement evacuation to prevent ITO slurries from producing new bubble when entering base substrate die cavity, bubble makes to be also easy to produce gas inside ITO base substrates Hole.Drain valve can by ITO slurry solid-liquid separation when the moisture that produces discharge outside mould.One effect of air compressor machine is by compression Air by ITO slurries be pressed into base substrate die cavity in, another effect be after ITO blank formings by compressed air be blown in mould with Make the demoulding of ITO base substrates faster.Automatically pressurization or the release step by step of automatic grouting machine can be realized by electric-control system, to meet certainly The needs of dynamic pressure slip casting.Press provides external drive pressure for the sealing of several molds, and press axle couples with pressure head can level Stretch to prevent ITO slurries from overflowing in slip casing by pressure.Fixed station can be with stationary press and slide rail and for supporting press axle.It is sliding Rail can make several mold levels slide, and right-hand member mould is made when compressed air is blown into the right-hand member of mould and is put down on slide rail Move, then being blown into mould left end with compressed air deviates from ITO base substrates.
The course of work of the present invention is summarized as follows：
The ITO slurries prepared are poured in the slurry-storing container of automatic grouting machine, while keeping mechanical agitation.By three socket gauges Lattice identical mould is placed on slide rail, and carries out horizontal pressurization by press.Then start vacuum pump same to three molds When be evacuated to 200 ~ 1000Pa, restart air compressor machine and make its Stress control in 1.8 ~ 3.6MPa, automatic grouting machine 0.2 ~ Slip casting is implemented to each base substrate die cavity 12 under 7 ~ 20L/min with flow rate of grouting in the range of 1.3MPa, 400 × 10 are prepared after molding The ITO base substrates of × 500mm.The right-hand member and left end of three molds are blown into respectively finally by air compressor machine, deviate from can ITO base substrates.

Claims (5)

1. a kind of automatic pressure slip casting device for preparing ITO base substrates, the automatic pressure slip casting device includes air valve (1), vacuum pump (2), drain valve (3), air compressor machine (4), automatic grouting machine (5), press (6), press axle (7), pressure head (8), mould Frame (9), external mold (10), internal model (11), fixed station (13) and slide rail (14), wherein framed (9), external mold (10) and internal model (11) structure Into one set of die, one set of die can prepare an ITO base substrate, and the raw material that ITO base substrates are used prepares ITO slurries by ITO powder body Material and Jing pressures are into ITO base substrates, the final molding size of ITO base substrates is high Gmm × thickness Hmm × long Lmm, its feature It is：
Internal model (11) is made up of left inside mould and right internal model, and the left inside mould is the first concavity body that everywhere wall thickness is h, h≤H, The each size of inner concave of the first concavity body is equal with G × H × L respectively, and the overall dimensions of the first concavity body are respectively etc. In high { G+2h } × thick { H+h } × long { L+2h }, the right internal model is in cuboid, and the overall dimensions of the cuboid are respectively equal to High G × thickness h × length { L+2h }, the relatively described cuboid of inner concave of the first concavity body simultaneously has the interior matched moulds be combineding with each other Face；
External mold (10) is made up of left outside mould and right external mold, and the left outside mould is that upper and lower both sides wall thickness is h1And remaining wall thickness is h2The second concavity body, h2＞ h1＞ h, each size of inner concave of the second concavity body is respectively equal to high { G+2h } × thick { H+h } × long { L+2h }, the overall dimensions of the second concavity body are respectively equal to height { G+2h+2h1} × thickness { H+h+h2} × long { L+2h+ 2h2, the right external mold is that upper and lower both sides wall thickness is h3And remaining wall thickness is h4The 3rd concavity body, h4＞ h3＞ h, described The each size of inner concave of three concavity bodies is respectively equal to high G × thickness h × length { L+2h }, the overall dimensions difference of the 3rd concavity body Equal to height { G+2h3} × thickness { h+h4} × long { L+2h+2h4, the overall dimensions of the second concavity body are equal to the 3rd concavity The overall dimensions of body, the inner concave of the relatively described 3rd concavity body of inner concave of the second concavity body simultaneously has what is be combined with each other Outer land area；
Framed (9) are made up of left mould frame and right mould frame, and the left mould frame is that everywhere wall thickness is h5The 4th concavity body, h5≥h2, The each size of inner concave of the 4th concavity body is respectively equal to height { G+2h+2h1} × thickness { H+h+h2} × long { L+2h+2h1, institute The overall dimensions for stating the 4th concavity body are respectively equal to height { G+2h+2h1+2h5} × thickness { H+h+h2+h5} × long { L+2h+2h1+ 2h5, the right mould frame is that everywhere wall thickness is h6The 5th concavity body, h6≥h4, each chi of inner concave of the 5th concavity body Very little respectively equal to height { G+2h3} × thickness { h+h4} × long { L+2h+2h4, the overall dimensions of the 5th concavity body are respectively equal to height {G+2h3+2h6} × thickness { h+h4+h6} × long { L+2h+2h4+2h6, the overall dimensions of the 4th concavity body are equal to the described 5th The overall dimensions of concavity body, the inner concave of the relatively described 5th concavity body of inner concave of the 4th concavity body simultaneously has mutually knot The frame land area of conjunction；
The interior land area is respectively superposed and is referred to as land area with the outer land area and the frame land area, will be described left inside Mould is again mounted in the left outside mould in the 4th concavity body of the left mould frame after being mounted in the second concavity body of the left outside mould, this The inner concave of Shi Suoshu the first concavity bodies is towards the land area；The right internal model is mounted in into the 3rd concavity body of the right external mold After interior the right external mold is mounted in the 5th concavity body of the right mould frame again, the inner concave phase of the 4th concavity body after assembling Inner concave to the 5th concavity body simultaneously forms one set of die, the inner concave of the first concavity body per mold with it is described The cavity that cuboid is formed is called base substrate die cavity (12)；
The fixed station (13) that left and right two ends are respectively provided with is fixed on operating board by the slide rail (14) of several horizontal arrangements, The mould that number set placed side by side is assembled on several slide rails (14), the mould at the end that keeps left abuts left end fixed station (13), end of keeping right Mould abut right-hand member pressure head (8), pressure head (8) right-hand member connection press axle (7), the centerline of press axle (7) is in several molds In the symmetrical center line of height, press axle (7) is connected on press (6), and press (6) is fixed on right-hand member fixed station (13), Be each configured with air valve (1) in the upper end of left mould frame described in every mold and the right mould frame, the outlet tube of each air valve (1) or The upper end being passed through in the left outside mould or the upper end being passed through in the right external mold, all air valves (1) are connected in parallel on vacuum pump (2)； Drain valve (3), the output of automatic grouting machine (5) are each configured with the lower end of left outside mould described in every mold and the right external mold Pipe each leads into the lower end of every mold base substrate die cavity (12), and the outlet tube of air compressor machine (4) each leads into a left side described in every mold Framed and described right mould inframe, and turn in from the middle part of the left mould frame and the right mould frame respectively the left outside mould left end and The right-hand member of the right external mold.
2. a kind of automatic pressure slip casting device for preparing ITO base substrates according to claim 1, is characterized in that：Vacuum pump (2) vacuum pressure is controlled in 200 ~ 1000Pa.
3. a kind of automatic pressure slip casting device for preparing ITO base substrates according to claim 1, is characterized in that：Automatically note The grouting pressure control of pulp grinder (5) is controlled in 7 ~ 20L/min in 0.2 ~ 1.3MPa, the flow rate of grouting of automatic grouting machine (5).
4. a kind of automatic pressure slip casting device for preparing ITO base substrates according to claim 1, is characterized in that：Air compressor machine (4) Stress control is in 1.8 ~ 3.6MPa.
5. a kind of automatic pressure slip casting device for preparing ITO base substrates according to claim 1, is characterized in that：The left side Internal model, the right internal model, the left outside mould, the right external mold, the left mould frame and the right mould frame or by bisphenol A-type micropore Epoxy resin is made, or is made by Gypsum Fibrosum, or is made by quartz, or fibreglass enhancement mode is poly- Carbonic ester composite is made.
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CN109079963B (en) * 2018-07-11 2020-08-28 中国船舶重工集团公司第七二五研究所 Single-side pressure grouting forming mold and manufacturing method of ITO (indium tin oxide) plane target
CN110514811A (en) * 2019-08-29 2019-11-29 山东科技大学 A kind of indoor simulation grouting and reinforcing experimental rig and method
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CN202462576U (en) * 2012-02-11 2012-10-03 李永慎 Integral grouting and forming device for ceramic electric arc tube
CN203542792U (en) * 2013-09-20 2014-04-16 廖文祥 Ceramics slip casting system

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