CN101774215A

CN101774215A - Fine porous ceramic used as ceramic mold and molding technique

Info

Publication number: CN101774215A
Application number: CN200910103043A
Authority: CN
Inventors: 胡敏渝
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-12
Filing date: 2009-01-12
Publication date: 2010-07-14

Abstract

The invention relates to a new ceramic mold material and a molding technique for replacing gypsum mold and technique needed by traditional ceramic mold technique. Compared with a traditional mold, the inventive mold has the advantages of high strength, long service (a single mold can be used for more than million times), high preciseness, small number of needed single variety mold (hundreds of molds are needed in the traditional technique, while 2-3 molds are needed for the new material rolling technique, 6-8 molds are needed for pressure casting to achieve continuous production), and the like. The popularization of the mold and molding technique can radically change the existing ceramic production situation, save resources and energies, reduce pollution, enhance efficiency and product quality, and provide conditions for modernization and automation of ceramic production.

Description

Fine porous ceramic used as ceramic mold and moulding process

Technical field

The present invention relates to a kind of new ceramics production mould material and moulding process.

Background technology

It is mold materials (building except the pottery) that present whole world Production of Ceramics adopts gypsum substantially, the annual need with up to ten million ton gypsum, it mainly utilizes the loose structure of gypsum material, in forming processes such as law of increase of entropy slip casting or roll extrusion, the moisture that density is high in mud or the mud bar spreads in the low mould of dried moisture density, form base substrate, and contraction and mold separation are with the acquisition base substrate.This process time long (roll extrusion is moulded adobe blocks needs 20 minutes approximately, and slip casting needs 1 hour approximately), the time spent is longer during the drying condition difference.Because gypsum mold intensity is not high, more outstanding behind the chance water, access times generally are no more than 100 times.And because positioning accuracy is not high, so moulded pottery not yet put in a kiln to bake matched moulds vestige is obvious even the generation dislocation directly influences product quality.This Mold Making, seriously polluted, this one-tenth is high, and labor strength is big, has seriously restricted the development of ceramic industry.

Summary of the invention

The new technology mold materials, adopt micropore ceramics, be applicable to all technologies of ceramic tradition, it is made simply, mould and die accuracy is high, intensity is high (reusable reaching 1,000,000 times), and intensity is not subjected to moisture effects, and adopt compressed air to see through mould and mould adobe blocks, the time of moulding adobe blocks shortened to below 1 second, and (general traditional product is produced continuously needs hundreds of moulds thereby significantly reduce number of molds, the new material roll extrusion only needs 3 moulds, and slip casting 6-8 only can produce continuously).Can replace gypsum mold fully.

The specific embodiment

Selecting hard-paste for use, strengthening the porcelain raw material is base stock, with wherein be used to adjust the clay of raw material physical property and electrolyte slightly amount reduce even cast out, add any organic matter of 1%-5% (example: rice, face, starch, chaff and corresponding leavening example: flour adds the old face of fermentation simultaneously, and rice adds the Other-of material) at one's side as the new die raw material.Reach hard-paste, strengthen the blank fineness of porcelain raw material through ball milling, stopped ball milling one to two day, allow saccharomycete that this very small organic particle is further decomposed, ball milling was more evenly distributed organic matter in 6 hours once more, and raw material is refinement more.This raw material is made base substrate by the mould requirement, not glazing or part glazing on demand, burn till by hard-paste, the low 10-15 degree centigrade of requirement of reinforcement porcelain sintering temperature, insulation allowed organic matter fully be converted to carbon dioxide in about 20 minutes during temperature rises to 900-1000 degree centigrade, from base substrate, overflow, stay a large amount of small holes that gather, burn till the back like this and form the case hardness height, the bulk strength height, surface roughness is equivalent to gypsum mold, but density is not high, and water absorption rate (gas permeability) can reach 2-3%, obtains our needed micropore ceramics mould.This mould can bear the rolling technology desirable strength fully, slip casing by pressure technology 0.5pa desirable strength, and case hardness reaches more than Rockwell 70 degree, does not almost have wearing and tearing in the production forming process, can substitute various conventional gypsum ceramic dies fully and be used for producing.Require extra high mould can adopt mechanical grinding processing grinding tool die cavity and appearance and size to reach necessary requirement.

Now various micropore ceramics moulds being used for every ceramic molding is described below:

1, roll forming: mould requires as Fig. 1, by traditional rolling technology pressed compact, place special use to mould adobe blocks on the device (Fig. 2) the related base substrate of mould, as shown in the figure, forcing press vertical shaft 1 is being with sealing ring 5 pressure measuring cylinders 3 descending mould 4 edges of pushing down, and pushes down back compressed air hose 2 and opens, and compressed air passes mould 4 base substrate 6 is separated (being no more than one second), drop on the supporting plate 7, take out mould and reuse.

2, injection forming: identical with traditional slip casting, above lower open die is an example, mold shape such as Fig. 3.

3, plastic pressure forming: identical with traditional plastic pressure forming technology, only mold materials is different and do not need at gypsum mold inner disc compressed air fibre pipe.As Fig. 4.

4, slip casing by pressure moulding: identical only mold materials with traditional handicraft is different, and can take the plastic pressure forming mode to mould adobe blocks.

5, hollow slip casing by pressure moulding: mould requires identical with the injection forming mould, and moulding process is introduced separately.The popularization of the micropore ceramics mould and the technology of moulding adobe blocks, will cause a ceramic process revolution undoubtedly:

1, will reduce the exploitation of annual up to ten million ton gypsum, fire.Reduce resource exploitation, energy consumption and environmental pollution.

2, because this mould strength height, producing in batches needs fewly with mould, thereby thoroughly changes ceramics factory gypsum mold place and takies (existing factory reaches more than 30% general the occupation of land) situation.Conventional ceramic factory does not need to make gypsum mold if mould takes specialization to produce then, saves space more, labour cost and reduce to pollute.

3, die cost significantly reduces (typical products in mass production can be ignored substantially).

4, produce ceramic product standard degree and improve (because of mould is few, the precision height).

5, because mould self intensity height, precision height, but clamping for mechanization, automated production ceramic product provide condition, thereby can significantly reduce artificial, cost and improves the quality of products.

Claims

1. new material ceramic die, micropore ceramics mould (can popularly be interpreted as the foamed ceramics mould); It is characterized in that: compare with the traditional ceramics gypsum mold have the intensity height, case hardness height, life-span be long, can permeate water, gas.This mould uses traditional ceramics production technology to make, and substitutes the conventional gypsum mould.

2. it is characterized in that according to the described micropore ceramics mould of claim 1: strengthen adding 1%-5% organic matter and an amount of saccharomycete that adds in porcelain, the hard-paste raw material in tradition, make mode by the traditional ceramics raw material and make the mould raw material, decompose through ball mould and saccharomycete, small organic particle is evenly distributed in the mould raw material, presses the traditional ceramics moulding process and make mould.

3. it is characterized in that according to the described micropore ceramics mould of claim 1: strengthen porcelain to be lower than, the hard-paste sintering temperature is fired for 10-15 degree centigrade, make mould have the intensity height, case hardness height and density not high (mold materials is full of very small space), mould itself can see through the performance of empty G﹠W.

4. according to its feature of moulding adobe blocks of the described micropore ceramics mould of claim 1 be: roll extrusion, vertical compression and slip casting are all adopted compressed air to see through mould itself mould is separated with base substrate.