CN110666100A - Forming process for forming complex inner cavity of investment pattern - Google Patents
Forming process for forming complex inner cavity of investment pattern Download PDFInfo
- Publication number
- CN110666100A CN110666100A CN201910967937.9A CN201910967937A CN110666100A CN 110666100 A CN110666100 A CN 110666100A CN 201910967937 A CN201910967937 A CN 201910967937A CN 110666100 A CN110666100 A CN 110666100A
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- Prior art keywords
- core
- water
- soluble wax
- investment
- positioning
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000919 ceramic Substances 0.000 claims abstract description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 20
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 20
- 239000010703 silicon Substances 0.000 claims abstract description 20
- 239000004927 clay Substances 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000007547 defect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention belongs to the technical field of investment pattern inner cavity molding, and discloses a molding process for forming an investment pattern complex inner cavity, which comprises the following steps: s1, prefabricating a silicon-based ceramic loam core; s2, when the water-soluble wax core mold is used for pressing the water-soluble wax core for the first time, embedding the silicon-based ceramic clay core on a mold positioning block, and pressing the water-soluble wax to form a composite core I; s3, embedding the silicon-based ceramic clay core when the water-soluble wax core is pressed by the water-soluble wax core mold for the second time to form a composite core II; s4, placing the composite core II into an investment mold, positioning by using a positioning core and a water-soluble wax core positioning core head, and pressing an investment; and S5, dissolving the water-soluble wax core to obtain the investment pattern with the complex inner cavity embedded with the silica-based ceramic clay core. The process is realized by accurately positioning the die and pressing in multiple steps, and can achieve the purposes of high quality, high efficiency and good economy.
Description
Technical Field
The invention belongs to the technical field of investment pattern inner cavity forming, and particularly relates to a forming process for forming a complex inner cavity of an investment pattern.
Background
The existing method for manufacturing the inner cavity by precision investment casting comprises the following steps: the method is characterized in that the method comprises the following steps of metal combined core pulling, ceramic clay core, water-soluble wax core and urea water-soluble core, and each precision casting manufacturer can only use one method due to factors of equipment, a mould and a process, so that the method cannot meet the requirements of high quality, complex inner cavity forming and high quality, even if the requirements of high quality can be met, the cost is high, the method is not economical and the efficiency is not high; for the above method of making the inner cavity, there are the following drawbacks: the metal combined core pulling has the advantages of high manufacturing difficulty, poor size precision, more formed flashes and low efficiency; the ceramic core has high cost and low efficiency; the water soluble wax core has a complex inner cavity which can not be manufactured; the urea water soluble core has low surface roughness, low efficiency, low quality, incapability of forming a complex inner cavity of a casting, or poor economy, high cost and low efficiency.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a molding process for forming a complex inner cavity of a fusible pattern, and realizes the molding of the fusible pattern with high efficiency, high yield, good quality and good economy.
The invention is realized in such a way that a molding process for forming a complex inner cavity of an investment comprises the following steps:
s1, prefabricating a silicon-based ceramic loam core;
s2, pressing the water-soluble wax core by the water-soluble wax core mold for the first time to obtain a first water-soluble wax core, inlaying the silicon-based ceramic clay core on the mold positioning block, and pressing the water-soluble wax to form a composite core I;
s3, pressing the water-soluble wax core by the water-soluble wax core mold for the second time to obtain a second water-soluble wax core, and inlaying the silicon-based ceramic clay core to form a composite core II;
s4, placing the composite core II into an investment mold, positioning by using a positioning core and a water-soluble wax core positioning core head, and pressing an investment;
and S5, dissolving the water-soluble wax core to obtain the investment pattern with the complex inner cavity embedded with the silica-based ceramic clay core.
As the preferable technical scheme of the forming process for forming the complex inner cavity of the investment pattern, the water-soluble wax core positioning core print is positioned on one side of the side wall of the inner cavity of the investment pattern, and the secondary water-soluble wax core is fixed on the other side of the positioning core print.
As the preferable technical scheme of the forming process for forming the complex inner cavity of the investment pattern, the silicon-based ceramic sand core is clamped inside the water-soluble wax core positioning core head.
As the preferable technical scheme of the forming process for forming the complex inner cavity of the investment pattern, the first water-soluble wax core is positioned at the head end of the second water-soluble wax core far away from the positioning core of the water-soluble wax core and is filled with the investment pattern.
As the preferable technical scheme of the forming process for forming the complex inner cavity of the investment pattern, the positioning core is positioned between the water-soluble wax core positioning core print and the secondary water-soluble wax core.
The invention has the advantages and positive effects that: the molding process combines several core-making methods, and the advantages of each method are brought into play, so that partial defects are avoided. For example, the precision of the ceramic loam core is high, and the direct molding does not need shell making, thereby avoiding the defect of difficult molding of an inner hole due to complex operation. The water-soluble wax core can be formed by pressing through a die, a complex inner cavity can be formed, the surface roughness is high, the size is accurate, and the cost is lower than that of a ceramic clay core.
Drawings
FIG. 1 is a schematic diagram of a pattern provided by an embodiment of the present invention;
FIG. 2 is a schematic top view of an investment provided by an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3 according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line C-C of FIG. 3 according to an embodiment of the present invention;
in the figure: 1. melting; 2. a first water soluble wax core; 3. dissolving the wax core in water for the second time; 4. a positioning core; 5. a silicon-based ceramic loam core; 6. the water-soluble wax core positions the core print.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the molding process for forming a complex cavity of an investment provided by the embodiment of the present invention includes the following steps:
s1, prefabricating a silicon-based ceramic loam core;
s2, when the water-soluble wax core mold is used for pressing the water-soluble wax core for the first time, the water-soluble wax core 2 for the first time is obtained, the silicon-based ceramic clay core 5 is embedded on the mold positioning block, and the water-soluble wax is pressed to form a composite core I;
s3, pressing the water-soluble wax core for the second time by using the water-soluble wax core mold to obtain a water-soluble wax core 3 for the second time, and inlaying the silicon-based ceramic clay core 5 to form a composite core II;
s4, placing the composite core II into an investment mold, positioning by using a positioning core 4 and a water-soluble wax core positioning core head 6, and pressing an investment 1;
and S5, dissolving out the water-soluble wax core to obtain the investment pattern 1 embedded with the complex inner cavity of the silicon-based ceramic clay core 5.
Specifically, as shown in fig. 3 and 5, the water soluble wax core positioning core print 6 is positioned on one side of the side wall of the inner cavity of the investment pattern 1, and the second water soluble wax core 3 is fixed on the other side.
Specifically, as shown in fig. 4, the silicon-based ceramic core 5 is clamped inside the positioning core print 6 of the water-soluble wax core.
Specifically, as shown in fig. 3 and 5, the first water-soluble wax core is located at the end of the second water-soluble wax core 3 away from the core head 6 for positioning the water-soluble wax core, and the investment pattern 1 is filled with the water-soluble wax.
Specifically, as shown in fig. 3 and 5, the positioning core is located between the water-soluble wax core positioning core print 6 and the second water-soluble wax core 3.
The working principle of the invention is as follows: the molding process combines several core-making methods, and the advantages of each method are brought into play, so that partial defects are avoided. Prefabricating a silicon-based ceramic mud core; when a water-soluble wax core mold is used for pressing a water-soluble wax core for the first time, a first water-soluble wax core is obtained, a silicon-based ceramic clay core is embedded on a mold positioning block, and water-soluble wax is pressed to form a composite core I; pressing the water-soluble wax core for the second time by using a water-soluble wax core mould to obtain a water-soluble wax core for the second time, and inlaying the silicon-based ceramic clay core to form a composite core II; placing the composite core II into an investment mold, positioning by using a positioning core and a water-soluble wax core positioning core head, and pressing an investment; and dissolving the water-soluble wax core to obtain the fired mold with the complex inner cavity inlaid with the silica-based ceramic clay core. For example, the precision of the ceramic loam core is high, and the direct molding does not need shell making, thereby avoiding the defect of difficult molding of an inner hole due to complex operation. The water-soluble wax core can be formed by pressing through a die, a complex inner cavity can be formed, the surface roughness is high, the size is accurate, and the cost is lower than that of a ceramic clay core.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (5)
1. A molding process for forming an investment complex cavity is characterized by comprising the following steps:
s1, prefabricating a silicon-based ceramic loam core;
s2, pressing the water-soluble wax core by the water-soluble wax core mold for the first time to obtain a first water-soluble wax core, inlaying the silicon-based ceramic clay core on the mold positioning block, and pressing the water-soluble wax to form a composite core I;
s3, pressing the water-soluble wax core by the water-soluble wax core mold for the second time to obtain a second water-soluble wax core, and inlaying the silicon-based ceramic clay core to form a composite core II;
s4, placing the composite core II into an investment mold, positioning by using a positioning core and a water-soluble wax core positioning core head, and pressing an investment;
and S5, dissolving the water-soluble wax core to obtain the investment pattern with the complex inner cavity embedded with the silica-based ceramic clay core.
2. The molding process for forming a complex investment cavity according to claim 1, wherein the positioning core print of the water soluble wax core is located on one side of the side wall of the investment cavity, and the second water soluble wax core is fixed on the other side.
3. The molding process for forming a complex inner cavity of an investment mold according to claim 1 or 2, wherein the silicon-based ceramic core is clamped inside the positioning core head of the water-soluble wax core.
4. The molding process for forming an investment pattern complex cavity according to claim 1, wherein the first water soluble wax core is located at a tip end of the second water soluble wax core located away from the water soluble wax core, and the investment pattern is filled with the first water soluble wax core.
5. The molding process for forming an investment complex cavity according to claim 1 wherein the positioning core is located between the water soluble wax core positioning core print and the second water soluble wax core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910967937.9A CN110666100A (en) | 2019-10-12 | 2019-10-12 | Forming process for forming complex inner cavity of investment pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910967937.9A CN110666100A (en) | 2019-10-12 | 2019-10-12 | Forming process for forming complex inner cavity of investment pattern |
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| Publication Number | Publication Date |
|---|---|
| CN110666100A true CN110666100A (en) | 2020-01-10 |
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| CN201910967937.9A Pending CN110666100A (en) | 2019-10-12 | 2019-10-12 | Forming process for forming complex inner cavity of investment pattern |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2254505A1 (en) * | 1997-12-22 | 1999-06-22 | Joseph C. Schim | Rapidly forming complex hollow shapes using lost wax investment casting |
| CN201751049U (en) * | 2010-03-31 | 2011-02-23 | 沈阳普越实业有限公司 | Investment casting mold |
| CN103586413A (en) * | 2013-11-18 | 2014-02-19 | 中国南方航空工业(集团)有限公司 | Precision casting method for multi-cavity structural part |
| CN103769532A (en) * | 2012-10-24 | 2014-05-07 | 深圳市金宝盈珠宝首饰有限公司 | Method for preparing hollow wax mold by utilization of water-soluble wax |
| 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 |
| CN105855467A (en) * | 2016-04-11 | 2016-08-17 | 青岛立博汽车零部件精密铸造有限公司 | Wax core inner die used for precision casting and wax core manufacture method |
| CN206104811U (en) * | 2016-10-24 | 2017-04-19 | 辽宁工业大学 | Multitube connects part investment casting mould |
| CN106944592A (en) * | 2017-04-28 | 2017-07-14 | 鹰普航空零部件（无锡）有限公司 | Water-soluble wax and Water-soluble ceramic core combine the application in aluminium alloy model casting |
| CN107470556A (en) * | 2017-08-11 | 2017-12-15 | 深圳市九五至尊珠宝有限公司 | A kind of water-soluble wax hollow wax matrix manufacture craft of high finished product rate |
| US20180178278A1 (en) * | 2016-12-28 | 2018-06-28 | Mapna Group | Method for positioning core by soluble wax in investment casting |
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2019
- 2019-10-12 CN CN201910967937.9A patent/CN110666100A/en active Pending
Patent Citations (12)
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|---|---|---|---|---|
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| CN201751049U (en) * | 2010-03-31 | 2011-02-23 | 沈阳普越实业有限公司 | Investment casting mold |
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| CN105855467A (en) * | 2016-04-11 | 2016-08-17 | 青岛立博汽车零部件精密铸造有限公司 | Wax core inner die used for precision casting and wax core manufacture method |
| CN206104811U (en) * | 2016-10-24 | 2017-04-19 | 辽宁工业大学 | Multitube connects part investment casting mould |
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Application publication date: 20200110 |