CN102490258B - Mould and method for casting quartz crucibles - Google Patents
Mould and method for casting quartz crucibles Download PDFInfo
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- CN102490258B CN102490258B CN201110368792.4A CN201110368792A CN102490258B CN 102490258 B CN102490258 B CN 102490258B CN 201110368792 A CN201110368792 A CN 201110368792A CN 102490258 B CN102490258 B CN 102490258B
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Abstract
The invention discloses a mould for casting quartz crucibles, which comprises a mould main body. The mould main body comprises a mould cover, a periphery side wall and a mould core arranged in the mould cover and the periphery side wall. A crucible casting area is formed among the mould cover, the periphery side wall and the mould core, an open hole communicated with the crucible casting area is arranged on the mould cover, and a casting port communicated with the crucible casting area is arranged on the periphery side wall. The invention further discloses a method using the mould to cast crucibles, which comprises the following steps of feeding quartz slurry into a vacuum casting tank to be vacuumed, communicating the vacuum casting tank with the casting port of the mould, and connecting a funnel with the open hole on the mould cover. Thus, the quartz slurry can fill the whole crucible casting area through the casting port, and then the mould is placed horizontally to be formed. The mould and the method can reduce forming time of crucibles and improve percent of pass of the crucibles.
Description
Technical field
The present invention relates to a kind of quartz-ceramics processing technique field, be specifically related to a kind of mould and method of casting quartz crucibles.
Background technology
The preparation technology of quartz crucible for casting polycrystalline silicon ingot has injection forming and two kinds of modes of note solidification forming.Wherein, injection forming can be divided into two kinds of one side slip casting and two-sided slip castings.Two-sided slurry cast is because constant product quality, size are easily controlled, intensity is high; Obtaining most of producers adopts.
Existing two-sided pouring technology mainly adopts following two kinds of modes: (1) single hole casting, i.e. perforate cast in the middle of the mould upper cover, opens take at upper cover and open meter word groove centered by perforate as crucible corner, to mend slurry and exhaust used.(2) five hole castings; At upper cover, open 5 holes exactly and pour into a mould production, but this mode is because defect is more, does not substantially use now.
The shortcoming of existing two-sided single hole pouring technology mainly contain following some:
1, the moulding by casting time long, generally need 40～50h, affect output, cost increases.
2, bubble is easily gathered in crucible bottom, causes product rejection.
3, sprue gate causes more greatly place, sprue gate intensity low, easily produces cracking, makes product rejection.
4, rice word groove place's polishing amount is very large, has increased working strength and environmental pollution.Polishing can cause burnishing part strength decreased, and polishing vibration also easily causes product cracking, makes product rejection.
5, existing single hole cast is because exhaust is bad, and during cast, slurry and air are long time of contact, because silica crucible slurry contains organic matter, there will be skinning after ingress of air, affect crucible intensity, easily cause internal fissure defect.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of mould and method of casting quartz crucibles.
In order to solve the problems of the technologies described above, the invention discloses a kind of mould of casting quartz crucibles, comprise die ontology, described die ontology comprises die cap, surrounding abutment wall and is arranged on die cap and surrounding core rod within the walls, is crucible moulding by casting district between described die cap and surrounding abutment wall and core rod; Described die cap is provided with the perforate being communicated with described crucible moulding by casting district; Described surrounding abutment wall is provided with the sprue gate being communicated with described crucible moulding by casting district.
Mould of the present invention reduces to mend the size of slurry mouth greatly, the benefit slurry mouthful in existing technique
￠40mm has dwindled half.So not only can make molding time shortening more than 10 hours, and can also strengthen the intensity minimizing cracking that crucible is mended slurry mouthful place.Mould of the present invention is cancelled rice word groove, by the quartzy slurry of exhaust ports, product edge in moulding is mended to slurry, meets moulding process needs.
In the present invention, described die ontology below is provided with the support that makes die ontology and horizontal plane have certain angle.In the present invention, described angle angle is 1 degree～45 degree.During use, mould slant setting, make exhaust outlet at peak.Sprue gate is in bottom, exhaust outlet diagonal angle, from the edge port cast in crucible moulding by casting district, from bottom toward upper.During cast, can make the quartzy slurry of having taken out vacuum directly enter mould, reduce the contact-making surface of quartzy slurry and air, the organic components in stable slurry.Avoid Bubble formation.
In the present invention, described sprue gate is communicated with the minimum point in described crucible moulding by casting district.Certainly, sprue gate also can be communicated with position more than crucible moulding by casting district minimum point, but effect is not as pointing out minimum.
In the present invention, described perforate is two, and one of them is positioned at die cap center for mending the perforate of slurry, and another is positioned at and on die cap, connects antermarginal position for exhaust and the perforate of mending slurry.
In the present invention, described perforate is two, one of them is positioned at die cap center for mending the perforate of slurry, and another is positioned at and on die cap, connects antermarginal position for exhaust and the perforate of mending slurry, and for exhaust and the perforate of mending slurry, is communicated with the peak in described crucible moulding by casting district.
The invention also discloses a kind of method of using described die casting moulding silica crucible, comprise the following steps:
Step 1, adds quartzy slurry in vacuum pouring tank and vacuumizes;
Step 2, is communicated with vacuum pouring tank with the sprue gate of described mould;
Step 3, makes quartzy slurry be full of whole crucible moulding by casting district through sprue gate;
Step 4, keeps flat mould, waits to be formed.
The method of the invention, in step 2, connects funnel in the perforate on die cap.
Beneficial effect: the inventive method compared with prior art, has following advantage:
1, reduce molding time, generally need 23～30h, make manufacturing enterprise can obtain larger output under identical equipment investment, increase benefit.
2, reduce bubble, reduce sprue gate cracking, improve the qualification rate of crucible, new technology can improve 5-7 percentage point, increases benefit in the situation that not increasing output.
3, reduce crucible polishing amount, reduce workman's working strength, reduce the risk that worker suffers from anthraco-silicosis, more can environmental protection produce.
The contact-making surface of slurry and air while 4, reducing cast, material performance is more stable, and product quality is more guaranteed, improves qualification rate.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is done further and illustrated, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is mould structure schematic diagram one of the present invention.
Fig. 2 is mould structure schematic diagram two of the present invention.
The specific embodiment
As depicted in figs. 1 and 2, the invention discloses a kind of mould of casting quartz crucibles, comprise die ontology 1, described die ontology comprises die cap 2, surrounding abutment wall 3 and is arranged on die cap and surrounding core rod 4 within the walls, is crucible moulding by casting district 5 between described die cap and surrounding abutment wall and core rod; Described die cap is provided with the perforate being communicated with described crucible moulding by casting district; Described surrounding abutment wall is provided with the sprue gate 10 being communicated with described crucible moulding by casting district.Described die ontology below is provided with the support 9 that makes die ontology and horizontal plane have certain angle.Described angle angle is the minimum point that the 1 described sprue gate of degree, degree～45 is communicated with described crucible moulding by casting district.Described perforate is two, and one of them is positioned at die cap center for mending the perforate 6 of slurry, and another is positioned at and on die cap, connects antermarginal position for exhaust and the perforate 7 of mending slurry, and for exhaust and the perforate of mending slurry, is communicated with the peak in described crucible moulding by casting district.
The invention also discloses a kind of method of using described die casting moulding silica crucible, comprise the following steps:
Step 1, adds quartzy slurry in vacuum pouring tank 8 and vacuumizes.
Step 2, is communicated with vacuum pouring tank with the sprue gate of described mould; In perforate on die cap, connect funnel.
Step 3, makes quartzy slurry be full of whole crucible moulding by casting district through sprue gate.
Step 4, keeps flat mould, waits to be formed.
Embodiment
1, prepare one of quartzy slurry, vacuum pouring tank, gypsum mold body and teeming stage (angle of pouring platform becomes 5 degree, i.e. supports than Gao Yu ground, diagonal angle).
2, quartzy slurry is added in vacuum pouring tank and vacuumizes 50 minutes.
3, gypsum mold body is combined, one, the funnel that slurry tapping adds respectively height 20cm is mended in the slurry perforate of benefit on die cap and exhaust.
4, the gypsum mold body combining is put on teeming stage, note sprue gate direction to be placed on the angle at the bottom of pouring platform (being crucible moulding by casting district minimum point), exhaust outlet direction is placed on the position that teeming stage is high (being crucible moulding by casting district peak).
5, slurry and the vacuum pouring tank one of having taken out vacuum are lifted to teeming stage place, higher than plane on gypsum mold.
6, vacuum pouring tank feed opening pipe and die casting mouth are connected.
7, open cast switch, make directly to enter in moulding by casting district through sprue gate through vacuumizing the quartzy slurry of processing, until exhaust ports funnel waters, fill with, moulding by casting district is full of.
8, the die ontology of having poured into a mould is transferred to shaping position, keep flat die ontology.
9, wait for 20 hours and check mending slurry mouth and exhaust outlet, whether moulding is qualified.As just can die sinking taken out product after qualified; As defective, make it continue place, and each carries out procuratorial work moulding situation to two hours, molding effect is judged, every 8h, mend slurry.
The present embodiment product reduced bubble generation, reduced raw material and contact, mend slurry mouthful with air and reduce, and can cancel a rice word groove for product bottom, reached set technique object.
The invention provides a kind of mould and method of casting quartz crucibles; method and the approach of this technical scheme of specific implementation are a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.In the present embodiment not clear and definite each part all available prior art realized.
Claims (3)
1. the mould of a casting quartz crucibles, it is characterized in that, comprise die ontology, described die ontology comprises die cap, surrounding abutment wall and is arranged on die cap and surrounding core rod within the walls, is crucible moulding by casting district between described die cap and surrounding abutment wall and core rod; Described die cap is provided with the perforate being communicated with described crucible moulding by casting district; Described surrounding abutment wall is provided with the sprue gate being communicated with described crucible moulding by casting district;
Described die ontology below is provided with the support that makes die ontology and horizontal plane have certain angle;
Described angle angle is 1 degree～45 degree;
Described sprue gate is communicated with the minimum point in described crucible moulding by casting district.
2. the mould of a kind of casting quartz crucibles according to claim 1, it is characterized in that, described perforate is two, and one of them is positioned at die cap center for mending the perforate of slurry, and another is positioned at and on die cap, connects antermarginal position for exhaust and the perforate of mending slurry.
3. the mould of a kind of casting quartz crucibles according to claim 1, it is characterized in that, described perforate is two, one of them is positioned at die cap center for mending the perforate of slurry, another is positioned at and on die cap, connects antermarginal position for exhaust and the perforate of mending slurry, and for exhaust and the perforate of mending slurry, is communicated with the peak in described crucible moulding by casting district.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110368792.4A CN102490258B (en) | 2011-11-18 | 2011-11-18 | Mould and method for casting quartz crucibles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110368792.4A CN102490258B (en) | 2011-11-18 | 2011-11-18 | Mould and method for casting quartz crucibles |
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| CN102490258A CN102490258A (en) | 2012-06-13 |
| CN102490258B true CN102490258B (en) | 2014-07-30 |
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| CN104085044B (en) * | 2014-07-02 | 2017-03-15 | 黄舒遥 | A kind of method of utilization hollow ceramic mould molding hollow ceramic component |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202318532U (en) * | 2011-11-18 | 2012-07-11 | 徐州协鑫太阳能材料有限公司 | Mold for casting molding of quartz crucible |
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| JP2871466B2 (en) * | 1994-06-08 | 1999-03-17 | 東陶機器株式会社 | Slurry casting apparatus and molding method |
| JP2002086423A (en) * | 2000-09-12 | 2002-03-26 | Nippon Koatsu Concrete Kk | Method and apparatus for vacuum forming of concrete liner |
| FR2858611B1 (en) * | 2003-08-07 | 2006-11-24 | Saint Gobain Ct Recherches | PROCESS FOR MANUFACTURING A SINTERED AMORPHOUS SILICA PIECE, MOLD AND BARBOTIN IMPLEMENTED IN SAID METHOD |
| DE102004060792A1 (en) * | 2004-12-17 | 2006-06-29 | BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG | Process for producing a ceramic crucible |
| CN2810953Y (en) * | 2005-07-15 | 2006-08-30 | 毛广华 | Internal pressing type quasi-isostatic pressing device for product formed by cylindrical mold |
| KR100829263B1 (en) * | 2007-02-15 | 2008-05-13 | 박병옥 | Molding apparatus of vegetation a side wall block for waterway |
| CN101323525B (en) * | 2007-06-13 | 2013-01-23 | 山东理工大学 | Preparation of high-temperature ceramic crucible |
| JP5102744B2 (en) * | 2008-10-31 | 2012-12-19 | ジャパンスーパークォーツ株式会社 | Quartz crucible mold |
| CN201998306U (en) * | 2010-11-22 | 2011-10-05 | 龙立华 | Quartz ceramic crucible die |
| CN102153272B (en) * | 2010-12-21 | 2015-06-10 | 弘元新材料无锡有限公司 | Technique for preparing high-compactness quartz ceramic crucible |
| CN202037698U (en) * | 2011-03-09 | 2011-11-16 | 维苏威太阳能坩埚(苏州)有限公司 | Mold for preparing crucible |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202318532U (en) * | 2011-11-18 | 2012-07-11 | 徐州协鑫太阳能材料有限公司 | Mold for casting molding of quartz crucible |
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