CN106694799A - Shaping technological method in negative pressure casting of evanescent modes - Google Patents
Shaping technological method in negative pressure casting of evanescent modes Download PDFInfo
- Publication number
- CN106694799A CN106694799A CN201611150810.0A CN201611150810A CN106694799A CN 106694799 A CN106694799 A CN 106694799A CN 201611150810 A CN201611150810 A CN 201611150810A CN 106694799 A CN106694799 A CN 106694799A
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- China
- Prior art keywords
- shaping
- casting
- white mould
- technological method
- shaped
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Classifications
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- 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
- B22C7/023—Patterns made from expanded plastic materials
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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 casting, and relates to a technological method for shaping parts which easily generate casting deformation in the negative pressure casting production of evanescent modes. The technological method comprises the following steps of enabling foam beads to be normally shaped into products having the shape and the size by a forming machine and a mold; under the situation that an original mold is not shaped, performing normal casting, and measuring the deforming position and the deformation quantity; according to the measuring result of a sample which is not shaped, determining the shaping position and the shaping quantity of the original mold, and manufacturing a shaping tool; after the original mold is properly shaped through the shaping tool, fixing the shaped original mold through bonding a reinforcing rib; and coating fireproof materials to further fix the shape of the original mold. According to the technological method disclosed by the invention, the deformation quantity of a cast can be effectively controlled and greatly reduced, the technological method has good applicability to products manufactured from materials of which the elongation is low, such as gray cast iron, the manufacturing cost is greatly reduced, and the product accuracy is improved.
Description
Technical field
The invention belongs to casting technology field, and in particular to poured for easily generation in a kind of Negative casting of EPC production
Cast the process of the part shaping of deformation.
Background technology
Lost foam casting is by Mold Making and the identical foamed plastics of final products（Hereinafter referred to as " Bai Mo "）,
And refractory material one layer of shell of formation is coated with its surface, it is placed in sandbox, plus pass through vibration and negative pressure consolidation after sand again, finally
Line replacement is entered by molten metal liquid dialogue mould and the process of final products is formed.
Trimming is a kind of mature technology in casting industry, after the completion of casting.For casting due to mould chi
The deformation being heated in very little deviation or casting cycle with condensation process generation, applies certain load, in privileged site to casting most
Whole geometry is adjusted, and reaches the purpose of design requirement.This technique material higher for elongation percentage, such as cast steel, be
The conventional and effective means of physical dimension are adjusted after a kind of casting.But for elongation percentage than relatively low material, such as gray cast iron
Or high-grade nodular cast iron, because material is very crisp, it is impossible to reach the purpose of adjustment physical dimension by shaping.For these materials
Yielding thin-walled large scale casting, it is impossible to the characteristics of shaping, cause Foundry Works to have to by more experiments and tighter
The process control of lattice, reaches one-shot forming result in place, slightly deviation, and the scrappage that may result in product is significantly increased.
The content of the invention
A kind of white mould suitable on Negative casting of EPC that the purpose of the present invention is proposed to solve above difficulty
The process of shaping.
Main technical schemes of the invention：Shaping process method in Negative casting of EPC, for casting preceding white mould
Shaping, it is characterized in that comprising the following steps：
1) forming machine and mould are used, foam beads is normally molded to shape of product and size；
2) in the state of white mould shaping is not carried out, normal casting, and measure deformation position and deflection；
3) according to non-shaping sample measurement result, it is determined that white mould shaping position and shaping amount, make shaping tooling；
4) by shaping tooling by white mould shaping in place after, by being bonded reinforcement, by shaping after white mould fix；
5) refractory material dialogue mould shape is coated with further to be fixed.
Typical shaping process method of the invention, will can not carried out under white mould shaping state, normal the big of product of casting
The cylindrical ovality for deforming of diameter, less than 2 millimeters are reduced to by more than 6 millimeters of stabilizations, meet complete product design requirement.
Because in casting, white mould does not take out, so the precision and geometry of white mould directly determine final products
Quality.Simultaneously also for this reason that, shaping process need not be carried out after pouring.Present invention basis is divided pilot sample
Analysis, dialogue mould carries out shaping.The characteristics of having certain elasticity and intensity using white mould, by the reversal deformation of dialogue mould so that
Product after casting directly reaches the size and precision of design.
Present invention process method, can effectively control and be greatly reduced casting deformation amount, to the elongation percentage such as gray cast iron compared with
The product that low material makes has good applicability, greatly reduces manufacturing cost, improves Product Precision.
Brief description of the drawings
Fig. 1 is the planform schematic diagram of embodiment of the present invention casting.
Fig. 2 is not carry out the deformation position schematic diagram of casting during white mould shaping in embodiment.
Fig. 3 is the schematic diagram of white mould shaping stickup reinforcement in embodiment.
Specific embodiment
The present invention is described in detail in reference to embodiment and accompanying drawing.
Embodiment：Shaping process method in Negative casting of EPC, for the shaping of white mould before casting, it is main include with
Lower step：
1) forming machine and mould are used, foam beads is normally molded to shape of product and size, as shown in Figure 1；
2) in the state of white mould shaping is not carried out, normal casting, and deformation position and deflection are measured, sent out from measurement result
Existing, the cylindrical many places of major diameter deform, ovality more than 6 millimeters, as shown in Figure 2；
3) according to the measurement result of non-shaping casting, it is determined that white mould shaping position and shaping amount.Make shaping tooling；
4) by shaping tooling by white mould shaping in place after, then by being bonded reinforcement, by shaping after white mould fix, such as Fig. 3
It is shown；
5) refractory material dialogue mould shape is coated with further to be fixed；
6) by shaping and strengthened white mould after pouring, ovality stabilization is reduced to less than 2 millimeters, and meeting product design will
Ask.
Embodiment is used for casting of the elongation percentage than relatively low material casting, such as gray cast iron or high-grade nodular cast iron.From with
Upper embodiment can be seen that shaping process method of the invention, will can not carry out under white mould shaping state, product of normally casting
The cylindrical ovality for deforming of major diameter, be reduced to less than 2 millimeters by more than 6 millimeters of stabilizations, meet complete product design
It is required that.
Claims (3)
1. a kind of shaping process method in Negative casting of EPC, for casting before white mould shaping, it is characterized in that including with
Lower step：
1）Using forming machine and mould, foam beads are normally molded to shape of product and size；
2）In the state of white mould shaping is not carried out, normal casting, and measure deformation position and deflection；
3）According to non-shaping sample measurement result, it is determined that white mould shaping position and shaping amount, make shaping tooling；
4）By shaping tooling by white mould shaping in place after, by being bonded reinforcement, by shaping after white mould fix；
5）Refractory material dialogue mould shape is coated with further to be fixed.
2. shaping process method as claimed in claim 1, it is characterised in that do not carry out under white mould shaping state, normal casting is produced
The cylindrical ovality for deforming of the major diameter of product, less than 2 millimeters are reduced to by more than 6 millimeters of stabilizations.
3. shaping process method as claimed in claim 1, it is characterized in that in the casting of the relatively low material casting of elongation percentage, bag
Include gray cast iron or high-grade nodular cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611150810.0A CN106694799A (en) | 2016-12-14 | 2016-12-14 | Shaping technological method in negative pressure casting of evanescent modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611150810.0A CN106694799A (en) | 2016-12-14 | 2016-12-14 | Shaping technological method in negative pressure casting of evanescent modes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106694799A true CN106694799A (en) | 2017-05-24 |
Family
ID=58937440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611150810.0A Pending CN106694799A (en) | 2016-12-14 | 2016-12-14 | Shaping technological method in negative pressure casting of evanescent modes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106694799A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552727A (en) * | 2017-11-02 | 2018-01-09 | 盛瑞传动股份有限公司 | A kind of evaporative pattern aligning gear |
| CN112059114A (en) * | 2020-09-02 | 2020-12-11 | 芜湖新兴新材料产业园有限公司 | Lost foam casting process for nodular cast iron inspection well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030036521A (en) * | 2003-04-14 | 2003-05-09 | 장명희 | Antifoaming rubber mold |
| CN101181733A (en) * | 2007-08-21 | 2008-05-21 | 李士良 | Method for making hollow wax matrix |
| CN101767185A (en) * | 2009-12-25 | 2010-07-07 | 中国科学院金属研究所 | Quantitative reverse deformation arrangement based method for designing cast model |
| CN202283587U (en) * | 2011-11-14 | 2012-06-27 | 李复旺 | Anti-deformation foam mold for headstock |
| CN202667547U (en) * | 2012-07-02 | 2013-01-16 | 山西模范机械制造有限公司 | Evaporative pattern anti-deformation white mold for large-sized thin-walled valve body |
-
2016
- 2016-12-14 CN CN201611150810.0A patent/CN106694799A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030036521A (en) * | 2003-04-14 | 2003-05-09 | 장명희 | Antifoaming rubber mold |
| CN101181733A (en) * | 2007-08-21 | 2008-05-21 | 李士良 | Method for making hollow wax matrix |
| CN101767185A (en) * | 2009-12-25 | 2010-07-07 | 中国科学院金属研究所 | Quantitative reverse deformation arrangement based method for designing cast model |
| CN202283587U (en) * | 2011-11-14 | 2012-06-27 | 李复旺 | Anti-deformation foam mold for headstock |
| CN202667547U (en) * | 2012-07-02 | 2013-01-16 | 山西模范机械制造有限公司 | Evaporative pattern anti-deformation white mold for large-sized thin-walled valve body |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552727A (en) * | 2017-11-02 | 2018-01-09 | 盛瑞传动股份有限公司 | A kind of evaporative pattern aligning gear |
| CN112059114A (en) * | 2020-09-02 | 2020-12-11 | 芜湖新兴新材料产业园有限公司 | Lost foam casting process for nodular cast iron inspection well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |