CN105234350B - 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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- CN105234350B CN105234350B CN201510787238.8A CN201510787238A CN105234350B CN 105234350 B CN105234350 B CN 105234350B CN 201510787238 A CN201510787238 A CN 201510787238A CN 105234350 B CN105234350 B CN 105234350B
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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, and in particular to a kind of thick big and size mutation ceramic core and its preparation side
Method.
Background technology
It is well known that ceramic core is typically formed the inner chamber of foundry goods that is complex-shaped or being difficult to shape, as simplification
Technique, reduces cost improve a kind of special process means of casting qualified rate.The effect of ceramic core is the inner chamber to form foundry goods
Structure, with the requirement of crust mould and shell common guarantee foundry goods to cavity size precision.For improving product and weaponry
Performance, meet the wall thickness such as integration, lightweight and foundry goods design design requirement, the inner chamber of foundry goods becomes increasingly complex, and makes pottery
Porcelain core wall thickness great disparity is also increasing, and bulk ceramics core difficulty is very big, and dimensional accuracy difficulty or ease are controlled, and often occurs becoming
The problems such as shape, shrinkage depression, therefore the required precision more and more higher of the ceramic core to the mutation of thick big and size, how to solve it is thick big and
It is urgent need solution in production that size mutation ceramic core prepares problem.
The content of the invention
For the problem that prior art is present, the present invention provides a kind of thick big and size mutation ceramic core and its preparation side
Method, can significantly reduce the manufacture difficulty of ceramics core, and the size of effective control ceramic core reduces deformation and shrinkage depression, improves pottery
The qualification rate of porcelain core.Technical scheme is as follows：
A kind of thick big and size mutation ceramic core 1, including hollow ceramic core biscuit 2 and prefabricated ceramic core biscuit 3,
Prefabricated ceramic core biscuit 3 is arranged in hollow ceramic core biscuit 2, and ceramic core biscuit 2 is logical with prefabricated ceramic core biscuit 3
Cross ceramic size bonding；The hollow ceramic core biscuit 2 be rectangular structure, along its length to arranging cylinder on side
The hollow locating rod 21 and 22 of body, the boring planform and pre- potting of the hollow locating rod of cuboid 23, cylinder 21 and 22
Porcelain core biscuit 3 is identical；The prefabricated ceramic core biscuit 3 is also rectangular structure, the round table-like positioning boss of its surface distributed
31st, the structure of cylindrical solid locating rod 32 and 33, core print 34, and equal rounding R3～R8, wherein institute at the seamed edge of cuboid
31 quantity of round table-like positioning boss is stated for 19, front and rear surfaces are respectively uniformly distributed 6, the respectively distribution 1 of left and right surface, upper surface are put down
Row distribution 3, the parallel distribution of lower surface 2；The core print 34 is arranged on cuboid lower surface, positioned at 2 positioning boss 31
Centre, three is on same central shaft；The cylindrical solid locating rod 32 and 33 is located at cuboid upper and lower surface respectively,
With the 31 parallel distribution of round table-like positioning boss, and both upper and lower surface Distribution Pattern be antisymmetry.
The size of 2 rectangular structure of hollow ceramic core biscuit is：Long 90～120mm, wide 65～85mm, high by 55～
70mm。
The size of prefabricated 3 rectangular structure of ceramic core biscuit is：Long 60～90mm, wide 35～55mm, high by 25～
40mm。
A diameter of 10～16mm of the hollow locating rod of the cylinder of the hollow ceramic core biscuit 2 21 and 22, pre- potting
Diameter of the diameter of a diameter of 5～10mm, 21 and 22 of the cylindrical solid locating rod 32 and 33 of porcelain core biscuit 3 compared with 32 and 33
It is long, and to the youthful and the elderly 4mm, and in the ceramic core 1 of thick big and size mutation locating rod 11 and 12 respectively with prefabricated ceramic mould
Hollow locating rod of the cylinder of the cylindrical solid locating rod 32 and 33 and hollow ceramic core biscuit 2 of core biscuit 3 21 and 22 etc.
It is long and coaxial.
31 a height of 10～15mm of the round table-like positioning boss, round platform bottom surface circle radius be R3～4mm, round platform top surface circle
Radius be R2～2.4mm, the junction rounding R1～R1.5 of round platform bottom surface and cuboid, rounding at the seamed edge of round platform top surface
Angle R2～R4, and the radius of rounding is identical with the radius that top surface is justified.
The thick big and size is mutated the preparation method of ceramic core, carries out according to following processing step：
(1) prefabricated ceramic core biscuit is put in the lower mould of thick big and size mutation ceramic core mould, is properly positioned,
Matched moulds；
(2) ceramic size for having configured is heated to into 125～135 DEG C, is stirred 24～35 hours, treat its be cooled to 97～
When 102 DEG C, ceramic slurry is injected, be incubated 35～40 seconds, after the demoulding, obtain the thick big and size mutation ceramic core of ceramic core.
The composition and percentage composition of the ceramic size be：The oxidation of 40～60 μm of 20～30%, 2～15 μm of Erbia
The silica flour 30～60% that 5～15%, 2～20 μm of erbium, plasticizer 10～20%, dispersant 0.5～1.2%；Wherein plasticizer
For paraffin, Cera Flava and polyethylene mixture, dispersant is Oleic acid.
The preparation method of the ceramic size is：1st, plasticizer is added into barrel, is heated to 120～130 DEG C；2nd, will
Above-mentioned Erbia, silica flour are heated to 120～140 DEG C, and insulation was added in charging basket after 2 hours, mix homogeneously；3rd, add dispersion
Agent, stirs 24～30 hours.
The prefabricated ceramic core biscuit 3, hollow ceramic core biscuit 2 and thick big and size are mutated the pottery of ceramic core 1
Porcelain paste composition is identical.
The preparation method of the prefabricated ceramic core biscuit 3 is：[1], the ceramic slurry is imported into forming press size barrel,
Barrel temperature is 97～102 DEG C；[2], the mould of prefabricated ceramic core biscuit 3 is laid and heat on die mould machine worktable, setting
1～2Mpa of pressure, 15～30s of pressurize；[3], die mould, finishing burr obtain prefabricated ceramic core biscuit 3.
Compared with prior art, the characteristics of of the invention and have the beneficial effect that：
The present invention using it is previously prepared adapt to 1 shaped ceramic core biscuit 3 of thick big and size mutation ceramic core (without
Sintering), prefabricated ceramic core biscuit 3 is put in the thick big and size mutation 1 time mould of ceramic core of preparation, after being properly positioned, is closed
Mould, then the method by secondary grouting, realize reducing the trend of " thick big and size mutation " using hollow ceramic core biscuit 2,
The manufacture difficulty of ceramics core can be significantly reduced, the size of effective control ceramic core reduces deformation and shrinkage depression, effectively increases
The qualification rate of ceramic core finished product.
Description of the drawings
Fig. 1 is thickness of the invention greatly and size is mutated the schematic perspective view of ceramic core, wherein 1 is that thickness is big and size is mutated
Ceramic core.
Fig. 2 is the floor map that the thick big and size of the present invention is mutated ceramic core, wherein (a) is side view, (b) is
Front view, is (c) top view, and 11 and 12 are thick big and size mutation ceramic core locating rod.
Fig. 3 is the sectional view in A-A faces in Fig. 2 (a) figures, wherein 2：Hollow ceramic core biscuit；3：Prefabricated ceramic core
Biscuit；21 and 22：The hollow locating rod of cylinder of hollow ceramic core biscuit 2；32 and 33：The circle of prefabricated ceramic core biscuit 3
The solid locating rod of cylinder.
Fig. 4 is the structural representation of hollow ceramic core biscuit, wherein 23：Cuboid.
Fig. 5 is the structural representation of prefabricated ceramic core biscuit.
Fig. 6 is the floor map of prefabricated ceramic core biscuit, wherein (a) is the side view of prefabricated ceramic core biscuit,
B () is the front view of prefabricated ceramic core biscuit, (c) be the top view of prefabricated ceramic core biscuit, 31：Round table-like convex
Platform；34：Core print.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
A kind of thick big and size mutation ceramic core 1, as shown in Figures 1 to 3, including hollow ceramic core biscuit 2 and prefabricated
Ceramic core biscuit 3, prefabricated ceramic core biscuit 3 are arranged in hollow ceramic core biscuit 2, ceramic core biscuit 2 with it is prefabricated
Ceramic core biscuit 3 is bonded by ceramic size；The hollow ceramic core biscuit 2 is rectangular structure, along its length
To arranging the hollow locating rod 21 and 22 of cylinder on side, the boring of the hollow locating rod of cuboid 23, cylinder 21 and 22
Planform is identical with prefabricated ceramic core biscuit 3, as shown in Figure 4；The prefabricated ceramic core biscuit 3 be cuboid, such as Fig. 5
Shown in～6, the structure of the round table-like positioning boss 31 of its surface distributed, cylindrical solid locating rod 32 and 33, core print 34, and it is rectangular
Equal rounding R3～R8 at the seamed edge of body, wherein 31 quantity of round table-like positioning boss is 19, front and rear surfaces are each uniform point
Cloth 6, the respectively distribution 1 of left and right surface, the parallel distribution of upper surface 3, the parallel distribution of lower surface 2；The core print 34 is arranged on
Cuboid lower surface, positioned at the centre of 2 positioning boss 31, three is on same central shaft；The cylindrical solid is fixed
Position bar 32 and 33 is located at cuboid upper and lower surface, and 31 parallel distribution of round table-like positioning boss respectively, and both are in upper and lower surface
Distribution Pattern be antisymmetry.
The size of 2 rectangular structure of hollow ceramic core biscuit is：Long 90mm, wide 65mm, high 55mm.
The size of prefabricated 3 rectangular structure of ceramic core biscuit is：Long 60mm, wide 35mm, high 25mm.
The diameter of the hollow locating rod of the cylinder of the hollow ceramic core biscuit 2 21 and 22 is respectively 11mm and 15mm,
Length is respectively 15mm and 20mm；The diameter of the cylindrical solid locating rod 32 and 33 of prefabricated ceramic core biscuit 3 is respectively 6mm
And 10mm, length is respectively 30mm and 35mm, and in thick big and size mutation ceramic core 1 locating rod 11 and 12 respectively with
The hollow locating rod 21 and 22 of cylinder of hollow ceramic core biscuit 2 is isometric and coaxial.
31 a height of 15mm of the round table-like positioning boss, the radius of round platform bottom surface circle is R4mm, the radius R of round platform top surface circle
For the junction rounding R1.5, rounding R2.4 at the seamed edge of round platform top surface of 2.4mm, round platform bottom surface and cuboid.
The thick big and size is mutated the preparation method of ceramic core 1, carries out according to following processing step：
(1) prefabricated ceramic core biscuit 3 is put in the lower mould of thick big and size mutation 1 mould of ceramic core, is just determined
Position, matched moulds；
(2) ceramic size for having configured is heated to into 130 DEG C, is stirred 24 hours, when which is cooled to 97～102 DEG C, note
Ceramic slurry is penetrated, 35～40 seconds are incubated, the thick big and size mutation ceramic core 1 of ceramic core after the demoulding, is obtained.
The composition and percentage composition of the ceramic size be：The oxidation of 40～60 μm of 20～30%, 2～15 μm of Erbia
The silica flour 30～60% that 5～15%, 2～20 μm of erbium, plasticizer 10～20%, dispersant 0.5～1.2%；Wherein plasticizer
For paraffin, Cera Flava and polyethylene mixture, dispersant is Oleic acid.
The preparation method of the ceramic size is：1st, plasticizer is added into barrel, is heated to 120～130 DEG C；2nd, will
Above-mentioned Erbia, silica flour are heated to 120～140 DEG C, and insulation was added in charging basket after 2 hours, mix homogeneously；3rd, add dispersion
Agent, stirs 24～30 hours.
The prefabricated ceramic core biscuit 3, hollow ceramic core biscuit 2 and thick big and size are mutated the pottery of ceramic core 1
Porcelain paste composition is identical.
The preparation method of the prefabricated ceramic core biscuit 3 is：[1], the ceramic slurry is imported into forming press size barrel,
Barrel temperature is 97～102 DEG C；[2], the mould of prefabricated ceramic core biscuit 3 is laid and heat on die mould machine worktable, setting
1～2Mpa of pressure, 15～30s of pressurize；[3], die mould, finishing burr obtain prefabricated ceramic core biscuit 3.
The face that thick big and size mutation ceramic core 1 is susceptible to be recessed is also show in Fig. 2, this programme can be very good
Solve the depression problem in these faces.
Claims (10)
1. a kind of thick big and size is mutated ceramic core, it is characterised in that including hollow ceramic core biscuit (2) and prefabricated ceramics
Core biscuit (3), prefabricated ceramic core biscuit (3) are arranged in hollow ceramic core biscuit (2), ceramic core biscuit (2) with
Prefabricated ceramic core biscuit (3) is bonded by ceramic size；The hollow ceramic core biscuit (2) is rectangular structure, along long
Degree direction to arrange on side the hollow locating rod of cylinder (21,22), cuboid (23), the hollow locating rod of cylinder (21,
22) boring planform is identical with prefabricated ceramic core biscuit (3)；The prefabricated ceramic core biscuit (3) is also length
Cube structure, the round table-like positioning boss of its surface distributed (31), cylindrical solid locating rod (32,33), the structure of core print (34),
And equal rounding R3～R8 at the seamed edge of cuboid, wherein the round table-like positioning boss (31) quantity is 19, front and rear surfaces
6 are uniformly distributed respectively, the respectively distribution 1 of left and right surface, the parallel distribution of upper surface 3, the parallel distribution of lower surface 2；The core print
(34) cuboid lower surface is arranged on, positioned at the centre of 2 positioning boss (31), three is on same central shaft；It is described
Cylindrical solid locating rod (32,33) respectively be located at cuboid upper and lower surface, distribution parallel with round table-like positioning boss (31), and
Both are antisymmetry in the Distribution Pattern of upper and lower surface.
2. a kind of thick big and size according to claim 1 is mutated ceramic core, it is characterised in that the hollow ceramic type
The size of core biscuit (2) rectangular structure is：Long 90～120mm, wide 65～85mm, high 55～70mm.
3. a kind of thick big and size according to claim 1 is mutated ceramic core, it is characterised in that the prefabricated ceramic mould
The size of core biscuit (3) rectangular structure is：Long 60～90mm, wide 35～55mm, high 25～40mm.
4. a kind of thick big and size according to claim 1 is mutated ceramic core, it is characterised in that the hollow ceramic type
The hollow locating rod of cylinder (21, a diameter of 10～16mm 22), the cylinder of prefabricated ceramic core biscuit (3) of core biscuit (2)
(32, a diameter of 5～10mm 33), (21, diameter 22) is compared with cylindrical solid for the hollow locating rod of cylinder for the solid locating rod of body
Locating rod (32, diameter 33) is long, and to the youthful and the elderly 4mm, and in thick big and size mutation ceramic core locating rod (11) and
(12) respectively with the cylindrical solid locating rod of prefabricated ceramic core biscuit (3) (32,33) and hollow ceramic core biscuit (2)
The hollow locating rod of cylinder (21, it is 22) isometric and coaxial.
5. a kind of thick big and size according to claim 1 is mutated ceramic core, it is characterised in that the round table-like positioning
A height of 10～the 15mm of boss (31), the radius of round platform bottom surface circle is R3～4mm, and the radius of round platform top surface circle is R2～2.4mm, round
Platform bottom surface and junction rounding R1～R1.5, the rounding R2～R4 at the seamed edge of round platform top surface of cuboid, and rounding
Radius it is identical with the radius that top surface is justified.
6. a kind of thick big and size described in claim 1 is mutated the preparation method of ceramic core, it is characterised in that according to following
Processing step is carried out：
(1) prefabricated ceramic core biscuit is put in the lower mould of thick big and size mutation ceramic core mould, is properly positioned, closes
Mould；
(2) ceramic size for having configured is heated to into 125～135 DEG C, stirs 24～35 hours, treat which is cooled to 97～102 DEG C
When, ceramic slurry is injected, 35～40 seconds are incubated, the ceramic core of the thick big and size mutation of ceramic core after the demoulding, is obtained.
7. a kind of thick big and size according to claim 6 is mutated the preparation method of ceramic core, it is characterised in that described
The composition and percentage composition of ceramic size be：The Erbia 5～15%, 2 of 40～60 μm of 20～30%, 2～15 μm of Erbia
～20 μm of silica flour 30～60%, plasticizer 10～20%, dispersant 0.5～1.2%.
8. a kind of thick big and size according to claim 7 is mutated the preparation method of ceramic core, it is characterised in that described
Plasticizer is paraffin, Cera Flava and polyethylene mixture；Dispersant is Oleic acid.
9. a kind of thick big and size according to claim 7 is mutated the preparation method of ceramic core, it is characterised in that described
The preparation method of ceramic size is：1st, plasticizer is added into barrel, is heated to 120～130 DEG C；2nd, by above-mentioned Erbia,
Silica flour is heated to 120～140 DEG C, and insulation was added in charging basket after 2 hours, mix homogeneously；3rd, add dispersant, stirring 24～
30 hours.
10. a kind of thick big and size according to claim 7 is mutated the preparation method of ceramic core, it is characterised in that described
The preparation method of prefabricated ceramic core biscuit is：[1], the ceramic slurry is imported into forming press size barrel, barrel temperature is 97
～102 DEG C；[2], the mould of prefabricated ceramic core biscuit is laid and heat on die mould machine worktable, set 1～2Mpa of pressure, protect
15～30s of pressure；[3], die mould, finishing burr obtain prefabricated ceramic core biscuit.
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| CN201510787238.8A CN105234350B (en) | 2015-11-17 | 2015-11-17 | Thick, large and mutational-sized ceramic core and preparation method thereof |
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|---|---|---|---|
| CN201510787238.8A CN105234350B (en) | 2015-11-17 | 2015-11-17 | Thick, large and mutational-sized ceramic core and preparation method thereof |
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| Publication Number | Publication Date |
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| CN105234350A CN105234350A (en) | 2016-01-13 |
| CN105234350B true CN105234350B (en) | 2017-05-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112140282B (en) * | 2020-09-28 | 2022-02-15 | 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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| 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 |
| CN104493081A (en) * | 2014-12-09 | 2015-04-08 | 南京航空航天大学 | Wax injection mold for investment casting of hollow turbine blades and method for rapidly manufacturing wax injection mold |
| CN104526856A (en) * | 2014-12-31 | 2015-04-22 | 西安交通大学 | Method for improving position accuracy of mold core of integrated type ceramic mold |
| CN205551398U (en) * | 2015-11-17 | 2016-09-07 | 沈阳明禾石英制品有限责任公司 | Thick big and size sudden change ceramic core |
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2015
- 2015-11-17 CN CN201510787238.8A patent/CN105234350B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104493081A (en) * | 2014-12-09 | 2015-04-08 | 南京航空航天大学 | Wax injection mold for investment casting of hollow turbine blades and method for rapidly manufacturing wax injection mold |
| CN104526856A (en) * | 2014-12-31 | 2015-04-22 | 西安交通大学 | Method for improving position accuracy of mold core of integrated type ceramic mold |
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