CN105234350A - Thick, large and mutational-sized ceramic core and preparation method thereof - Google Patents
Thick, large and mutational-sized ceramic core and preparation method thereof Download PDFInfo
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- CN105234350A CN105234350A CN201510787238.8A CN201510787238A CN105234350A CN 105234350 A CN105234350 A CN 105234350A CN 201510787238 A CN201510787238 A CN 201510787238A CN 105234350 A CN105234350 A CN 105234350A
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Abstract
The invention provides a thick, large and mutational-sized ceramic core and a preparation method thereof. The ceramic core comprises a hollow ceramic core biscuit and a prefabricated ceramic core biscuit, wherein the prefabricated ceramic core biscuit is arranged in the hollow ceramic core biscuit; and the hollow ceramic core biscuit and the prefabricated ceramic core biscuit are bonded by ceramic slurry. The preparation method comprises the following steps: (1) putting the prefabricated ceramic core biscuit into a lower mould part of a thick, large and mutational-sized ceramic core mould, and carrying out accurate positioning and mould assembly; (2) heating and stirring the prepared ceramic slurry, cooling the ceramic slurry and then injecting the cooled ceramic slurry, and carrying out demoulding to obtain the ceramic core. According to the ceramic core and the preparation method provided by the invention, the manufacturing difficulty of the ceramic core can be remarkably lowered, the size of the ceramic core can be effectively controlled, deformation and shrinkage depression are reduced, and the qualified rate of finished ceramic core products can be effectively improved.
Description
Technical field
The invention belongs to casting technology field, be specifically related to a kind of thick ceramic core and preparation method thereof and size is suddenlyd change greatly.
Background technology
As everyone knows, ceramic core is generally used for the inner chamber forming foundry goods that is complex-shaped or that be not easily shaped, as Simplified flowsheet, reduces costs, improves a kind of special process means of casting qualified rate.The effect of ceramic core is the inner-cavity structure forming foundry goods, with crust mould and shell common guarantee foundry goods to the requirement of cavity size precision.In order to the serviceability of improving product and weaponry; meet the wall thickness design design requirements such as integration, lightweight and foundry goods; the inner chamber of foundry goods becomes increasingly complex; ceramic core wall thickness great disparity is also increasing; bulk ceramics core difficulty is very big, and dimensional accuracy difficulty or ease are controlled, and often there will be the problems such as distortion, shrinkage depression; therefore to thick large and required precision that the is ceramic core of size sudden change is more and more higher, how solving thick large and size sudden change ceramic core, to prepare problem be badly in need of solving in producing.
Summary of the invention
For prior art Problems existing, the invention provides a kind of thick ceramic core and preparation method thereof and size is suddenlyd change greatly, significantly can reduce the manufacture difficulty of pottery core, effectively control the size of ceramic core, reduce distortion and shrinkage depression, improve the qualification rate of ceramic core.Technical scheme of the present invention is as follows:
A kind of thick ceramic core 1 and size is suddenlyd change greatly, comprise hollow ceramic core element embryo 2 and prefabricated ceramic core biscuit 3, prefabricated ceramic core biscuit 3 is arranged in hollow ceramic core biscuit 2, and ceramic core element embryo 2 is bonded by ceramic size with prefabricated ceramic core element embryo 3; Described hollow ceramic core biscuit 2 is rectangular structure, along its length to side being arranged the hollow backstay 21 and 22 of cylinder, cuboid 23, backstay 21 are identical with prefabricated ceramic core biscuit 3 with the boring planform of 22; Described prefabricated ceramic core biscuit 3 is also rectangular structure, the structure of the round table-like positioning boss 31 of its surface distributed, backstay 32 and 33, core print 34, and the equal rounding R3 ~ R8 in the seamed edge place of cuboid, wherein said round table-like positioning boss 31 quantity is 19, front and rear surfaces is respectively uniformly distributed 6, the each distribution 1 in surface, left and right, the parallel distribution of upper surface 3, the parallel distribution of lower surface 2; Described core print 34 is arranged on cuboid lower surface, is positioned at the centre of 2 positioning boss 31, and three is on same central shaft; Described backstay 32 and 33 lays respectively at cuboid upper and lower surface, and with the parallel distribution of round table-like positioning boss 31, and both are antisymmetry in the Distribution Pattern of upper and lower surface.
Described hollow ceramic core biscuit 2 rectangular structure is of a size of: long 90 ~ 120mm, wide 65 ~ 85mm, high 55 ~ 70mm.
Described prefabricated ceramic core biscuit 3 rectangular structure is of a size of: long 60 ~ 90mm, wide 35 ~ 55mm, high 25 ~ 40mm.
The diameter of described hollow ceramic core biscuit 2 backstay 21 and 22 is 10 ~ 16mm, the diameter of prefabricated ceramic core biscuit 3 backstay 32 and 33 is 5 ~ 10mm, the diameter of 21 and 22 is long compared with the diameter of 32 and 33, and to the youthful and the elderly 4mm, and thick large and in the ceramic core 1 of size sudden change backstay 11 and 12 respectively with prefabricated ceramic core biscuit 3 backstay 32 and 33 and hollow ceramic core biscuit 2 backstay 21 and 22 isometric and coaxial.
Described round table-like positioning boss 31 height is 10 ~ 15mm, round platform bottom surface radius of a circle is R3 ~ 4mm, round platform end face radius of a circle is R2 ~ 2.4mm, the junction rounding R1 ~ R1.5 of round platform bottom surface and cuboid, the seamed edge place rounding R2 ~ R4 of round platform end face, and the radius of rounding is identical with end face radius of a circle.
The described thick large and preparation method of size sudden change ceramic core 1, carries out according to following processing step:
(1) prefabricated ceramic core biscuit 3 is put into the thick large and counterdie of ceramic core 1 mould of size sudden change, correctly locate, matched moulds;
(2) ceramic size configured is heated to 125 ~ 135 DEG C, stirs 24 ~ 35 hours, when it is cooled to 97 ~ 102 DEG C, injection ceramic slurry, be incubated 35 ~ 40 seconds, obtains the ceramic core that the thick large and size of ceramic core is suddenlyd change after the demoulding.
The composition of described ceramic size and percentage composition are: the silica flour 30 ~ 60% of the erbium oxide 5 ~ 15%, 2 ~ 20 μm of the erbium oxide 20 ~ 30%, 2 ~ 15 μm of 40 ~ 60 μm, plasticizer 10 ~ 20%, dispersant 0.5 ~ 1.2%; Wherein plasticizer is paraffin, beeswax and polyethylene mixture, and dispersant is oleic acid.
The preparation method of described ceramic size is: 1, be added in barrel by plasticizer, is heated to 120 ~ 130 ° of C; 2, above-mentioned erbium oxide, silica flour are heated to 120 ~ 140 ° of C, are incubated and join in charging basket after 2 hours, mix; 3, add dispersant, stir 24 ~ 30 hours.
Described prefabricated ceramic core biscuit 3, hollow ceramic core biscuit 2 and thick large and ceramic size composition that the is ceramic core 1 of size sudden change is identical.
The preparation method of described prefabricated ceramic core biscuit 3 is: [1], described ceramic slurry is imported forming press size barrel, and barrel temperature is 97 ~ 102 ° of C; [2], by the mould of prefabricated ceramic core biscuit 3 lay on forming press workbench and heat, setting pressure 1 ~ 2Mpa, pressurize 15 ~ 30s; [3], die mould, finishing burr obtain prefabricated ceramic core biscuit 3.
Compared with prior art, feature of the present invention and beneficial effect are:
The present invention adopts the thick large ceramic core element embryo 3(that ceramic core 1 is shaped and size is suddenlyd change of previously prepared adaptation to sinter), prefabricated ceramic core element embryo 3 is put into thick ceramic core 1 counterdie and size is suddenlyd change greatly of preparation, behind correct location, matched moulds, again by the method for secondary grouting, hollow ceramic core biscuit 2 is utilized to realize reducing the trend of " thick large and size sudden change ", significantly can reduce the manufacture difficulty of pottery core, the size of effective control ceramic core, reduce distortion and shrinkage depression, effectively improve the qualification rate of ceramic core finished product.
Accompanying drawing explanation
Fig. 1 is thick large and the plane of size sudden change ceramic core and schematic perspective view of the present invention, wherein 1: thick large and size sudden change ceramic core, 11 and 12 be thick large and size is suddenlyd change ceramic core backstay.
Fig. 2 is the sectional view in A-A face in Fig. 1, wherein 2: hollow ceramic core; 3: ceramic core biscuit; 21 and 22: hollow ceramic core biscuit 2 backstay; 32 and 33: prefabricated ceramic core biscuit 3 backstay.
Fig. 3 is the structural representation of hollow ceramic core biscuit, wherein 23: cuboid.
Fig. 4 is the structural representation of prefabricated ceramic core biscuit 3.
Fig. 5 is the floor map of prefabricated ceramic core biscuit 3, wherein 31: round table-like positioning boss; 34: core print.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1
A kind of thick ceramic core 1 and size is suddenlyd change greatly, as shown in Figure 1 and 2, comprise hollow ceramic core element embryo 2 and prefabricated ceramic core biscuit 3, prefabricated ceramic core biscuit 3 is arranged in hollow ceramic core biscuit 2, and ceramic core element embryo 2 is bonded by ceramic size with prefabricated ceramic core element embryo 3; Described hollow ceramic core biscuit 2 is rectangular structure, along its length to side being arranged the hollow backstay 21 and 22 of cylinder, cuboid 23, backstay 21 are identical with prefabricated ceramic core biscuit 3 with the boring planform of 22, as shown in Figure 3; Described prefabricated ceramic core biscuit 3 is cuboid, as shown in Fig. 4 ~ 5, the structure of the round table-like positioning boss 31 of its surface distributed, backstay 32 and 33, core print 34, and the equal rounding R3 ~ R8 in the seamed edge place of cuboid, wherein said round table-like positioning boss 31 quantity is 19, and front and rear surfaces is respectively uniformly distributed 6, each distribution 1 in surface, left and right, the parallel distribution of upper surface 3, the parallel distribution of lower surface 2; Described core print 34 is arranged on cuboid lower surface, is positioned at the centre of 2 positioning boss 31, and three is on same central shaft; Described backstay 32 and 33 lays respectively at cuboid upper and lower surface, and with the parallel distribution of round table-like positioning boss 31, and both are antisymmetry in the Distribution Pattern of upper and lower surface.
Described hollow ceramic core biscuit 2 rectangular structure is of a size of: long 90mm, wide 65mm, high 55mm.
Described prefabricated ceramic core biscuit 3 rectangular structure is of a size of: long 60mm, wide 35mm, high 25mm.
The diameter of described hollow ceramic core biscuit 2 backstay 21 and 22 is respectively 11mm and 15mm, and length is respectively 15mm and 20mm; The diameter of prefabricated ceramic core biscuit 3 backstay 32 and 33 is respectively 6mm and 10mm, length is respectively 30mm and 35mm, and thick large and in the ceramic core 1 of size sudden change backstay 11 and 12 isometric and coaxial with hollow ceramic core biscuit 2 backstay 21 and 22 respectively.
Described round table-like positioning boss 31 height is 15mm, and round platform bottom surface radius of a circle is R4mm, and round platform end face radius of a circle R is 2.4mm, the junction rounding R1.5 of round platform bottom surface and cuboid, the seamed edge place rounding R2.4 of round platform end face.
The described thick large and preparation method of size sudden change ceramic core 1, carries out according to following processing step:
(1) prefabricated ceramic core biscuit 3 is put into the thick large and counterdie of ceramic core 1 mould of size sudden change, correctly locate, matched moulds;
(2) ceramic size configured is heated to 130 DEG C, stirs 24 hours, when it is cooled to 97 ~ 102 DEG C, injection ceramic slurry, be incubated 35 ~ 40 seconds, obtains the ceramic core 1 that the thick large and size of ceramic core is suddenlyd change after the demoulding.
The composition of described ceramic size and percentage composition are: the silica flour 30 ~ 60% of the erbium oxide 5 ~ 15%, 2 ~ 20 μm of the erbium oxide 20 ~ 30%, 2 ~ 15 μm of 40 ~ 60 μm, plasticizer 10 ~ 20%, dispersant 0.5 ~ 1.2%; Wherein plasticizer is paraffin, beeswax and polyethylene mixture, and dispersant is oleic acid.
The preparation method of described ceramic size is: 1, be added in barrel by plasticizer, is heated to 120 ~ 130 ° of C; 2, above-mentioned erbium oxide, silica flour are heated to 120 ~ 140 ° of C, are incubated and join in charging basket after 2 hours, mix; 3, add dispersant, stir 24 ~ 30 hours.
Described prefabricated ceramic core biscuit 3, hollow ceramic core biscuit 2 and thick large and ceramic size composition that the is ceramic core 1 of size sudden change is identical.
The preparation method of described prefabricated ceramic core biscuit 3 is: [1], described ceramic slurry is imported forming press size barrel, and barrel temperature is 97 ~ 102 ° of C; [2], by the mould of prefabricated ceramic core biscuit 3 lay on forming press workbench and heat, setting pressure 1 ~ 2Mpa, pressurize 15 ~ 30s; [3], die mould, finishing burr obtain prefabricated ceramic core biscuit 3.
Also show the face of the thick large ceramic core 1 easily generation depression and size is suddenlyd change in Fig. 1, this programme can well solve the depression problem in these faces.
Claims (10)
1. a thick ceramic core and size is suddenlyd change greatly, it is characterized in that comprising hollow ceramic core element embryo (2) and prefabricated ceramic core biscuit (3), prefabricated ceramic core biscuit (3) is arranged in hollow ceramic core biscuit (2), and ceramic core element embryo (2) is bonded by ceramic size with prefabricated ceramic core element embryo (3); Described hollow ceramic core biscuit (2) is rectangular structure, along its length to side being arranged the hollow backstay of cylinder (21) and (22), cuboid (23), backstay (21) are identical with prefabricated ceramic core biscuit (3) with the boring planform of (22); Described prefabricated ceramic core biscuit (3) is also rectangular structure, the structure of the round table-like positioning boss of its surface distributed (31), backstay (32) and (33), core print (34), and the equal rounding R3 ~ R8 in the seamed edge place of cuboid, wherein said round table-like positioning boss (31) quantity is 19, front and rear surfaces is respectively uniformly distributed 6, the each distribution 1 in surface, left and right, the parallel distribution of upper surface 3, the parallel distribution of lower surface 2; Described core print (34) is arranged on cuboid lower surface, is positioned at the centre of 2 positioning boss (31), and three is on same central shaft; Described backstay (32) and (33) lay respectively at cuboid upper and lower surface, and with round table-like positioning boss (31) parallel distribution, and both are antisymmetry in the Distribution Pattern of upper and lower surface.
2. the thick ceramic core and size is suddenlyd change greatly of one according to claim 1, is characterized in that described hollow ceramic core biscuit (2) rectangular structure is of a size of: long 90 ~ 120mm, wide 65 ~ 85mm, high 55 ~ 70mm.
3. the thick ceramic core and size is suddenlyd change greatly of one according to claim 1, is characterized in that described prefabricated ceramic core biscuit (3) rectangular structure is of a size of: long 60 ~ 90mm, wide 35 ~ 55mm, high 25 ~ 40mm.
4. the thick ceramic core and size is suddenlyd change greatly of one according to claim 1, the diameter that it is characterized in that described hollow ceramic core biscuit (2) backstay (21) and (22) is 10 ~ 16mm, the diameter of prefabricated ceramic core biscuit (3) backstay (32) and (33) is 5 ~ 10mm, (21) and the diameter of the diameter of (22) comparatively (32) and (33) long, and to the youthful and the elderly 4mm, and thick large and in the ceramic core of size sudden change backstay (11) and (12) respectively with prefabricated ceramic core biscuit (3) backstay (32) and (33) and hollow ceramic core biscuit (2) backstay (21) and (22) isometric and coaxial.
5. the thick ceramic core and size is suddenlyd change greatly of one according to claim 1, it is characterized in that described round table-like positioning boss (31) height is 10 ~ 15mm, round platform bottom surface radius of a circle is R3 ~ 4mm, round platform end face radius of a circle is R2 ~ 2.4mm, the junction rounding R1 ~ R1.5 of round platform bottom surface and cuboid, the seamed edge place rounding R2 ~ R4 of round platform end face, and the radius of rounding is identical with end face radius of a circle.
6. the preparation method of a kind of thick large ceramic core and size is suddenlyd change according to claim 1, is characterized in that carrying out according to following processing step:
(1) prefabricated ceramic core biscuit is put into the thick large and counterdie of the ceramic core mould of size sudden change, correctly locate, matched moulds;
(2) ceramic size configured is heated to 125 ~ 135 DEG C, stirs 24 ~ 35 hours, when it is cooled to 97 ~ 102 DEG C, injection ceramic slurry, be incubated 35 ~ 40 seconds, obtains the ceramic core that the thick large and size of ceramic core is suddenlyd change after the demoulding.
7. the preparation method of a kind of thick large ceramic core and size is suddenlyd change according to claim 6, it is characterized in that composition and the percentage composition of described ceramic size are: the erbium oxide 20 ~ 30% of 40 ~ 60 μm, the erbium oxide 5 ~ 15% of 2 ~ 15 μm, the silica flour 30 ~ 60% of 2 ~ 20 μm, plasticizer 10 ~ 20%, dispersant 0.5 ~ 1.2%.
8. the preparation method of a kind of thick large ceramic core and size is suddenlyd change according to claim 7, is characterized in that described plasticizer is paraffin, beeswax and polyethylene mixture; Dispersant is oleic acid.
9. the preparation method of a kind of thick large ceramic core and size is suddenlyd change according to claim 7, is characterized in that the preparation method of described ceramic size is: 1, be added in barrel by plasticizer, be heated to 120 ~ 130 ° of C; 2, above-mentioned erbium oxide, silica flour are heated to 120 ~ 140 ° of C, are incubated and join in charging basket after 2 hours, mix; 3, add dispersant, stir 24 ~ 30 hours.
10. the preparation method of a kind of thick large ceramic core and size is suddenlyd change according to claim 7, it is characterized in that the preparation method of described prefabricated ceramic core biscuit is: [1], described ceramic slurry is imported forming press size barrel, barrel temperature is 97 ~ 102 ° of C; [2], by the mould of prefabricated ceramic core biscuit lay on forming press workbench and heat, setting pressure 1 ~ 2Mpa, pressurize 15 ~ 30s; [3], die mould, finishing burr obtain prefabricated ceramic core biscuit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112140282A (en) * | 2020-09-28 | 2020-12-29 | 中航装甲科技有限公司 | Method for improving fluidity of silicon-based ceramic core slurry |
| CN113426306A (en) * | 2021-06-25 | 2021-09-24 | 深圳通微纳米科技有限公司 | Double-layer hollow ceramic membrane and production process thereof |
| CN114953101A (en) * | 2021-02-22 | 2022-08-30 | 杭州中好东峻科技有限公司 | Ceramic-based manufacturing process of communication filter |
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| WO2009127721A1 (en) * | 2008-04-18 | 2009-10-22 | Snecma | Method for deburring a ceramic foundry core |
| CN103360079A (en) * | 2013-07-10 | 2013-10-23 | 西安交通大学 | Method for customizing core and shell of integrated ceramic mold of hollow turbine blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112140282A (en) * | 2020-09-28 | 2020-12-29 | 中航装甲科技有限公司 | Method for improving fluidity of silicon-based ceramic core slurry |
| CN114953101A (en) * | 2021-02-22 | 2022-08-30 | 杭州中好东峻科技有限公司 | Ceramic-based manufacturing process of communication filter |
| CN113426306A (en) * | 2021-06-25 | 2021-09-24 | 深圳通微纳米科技有限公司 | Double-layer hollow ceramic membrane and production process thereof |
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| CN105234350B (en) | 2017-05-03 |
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