CN106270394A - A kind of casting method solving evaporative pattern thick strip thermal center point - Google Patents
A kind of casting method solving evaporative pattern thick strip thermal center point Download PDFInfo
- Publication number
- CN106270394A CN106270394A CN201610710228.9A CN201610710228A CN106270394A CN 106270394 A CN106270394 A CN 106270394A CN 201610710228 A CN201610710228 A CN 201610710228A CN 106270394 A CN106270394 A CN 106270394A
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- CN
- China
- Prior art keywords
- casting
- coating
- sandbox
- chill
- mould
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
A kind of casting method solving evaporative pattern thick strip thermal center point of the present invention, relates to a kind of casting method, comprises the following steps that: (one) makes the chill matched with thicker position outline on white mould in advance；(2) at the external coating fireproof coating of white mould, and fireproof coating is dried；(3) on Bai Mo, the outer surface brushing of thicker position contains the coating of zirconium English powder, then is dried by the brushing coating containing zirconium English powder；(4) chill is placed on Bai Mo the brushing position containing zircon flour coating, and installs to the white mould being cased with chill cast in sandbox；(5) pouring into a mould under negative pressure, after cast, the thin film on casting sandbox opens at least two circulation pore, and in making casting sandbox, gas is circulated, and it is constant to keep casting negative pressure in sandbox, and after foundry goods cools down, mould turnover takes out foundry goods, unloads chill.Use the inventive method can effectively reduce thick and large casting and produce shrinkage cavity because of shrinkage porosite, it is ensured that the qualification rate of product when using lost foam casting thick and large casting.
Description
Technical field
The present invention relates to a kind of casting method, particularly to the casting method of a kind of evaporative pattern thick strip.
Background technology
Lost foam casting is that foam mould (being called for short " Bai Mo ") uses bindless dry sand to combine the reality of vacuum pumping technology
Mold casting, is that the bubbles model bonding essentially identical with casting dimension shape is combined into model cluster, brushes fireproof coating and dry
After Gan, being embedded in vibration molding in drystone sand, pour into a mould under negative pressure, make model gasify, liquid metals occupies modal position, solidification
The novel casting method of foundry goods is formed after cooling.
When thick and large casting uses lost-foam casting method to cast, the same with traditional casting method, in thicker portion
Divide also easily because shrinkage porosite produces shrinkage cavity, and affect casting quality, in lost foam casting, also there is no to solve thickness very well at present big
Foundry goods easily produces the problem of shrinkage cavity because of shrinkage porosite, and lost foam casting thick and large casting yet suffers from the defect that percent defective is too high.
Summary of the invention
It is an object of the invention to provide a kind of casting method solving evaporative pattern thick strip thermal center point, use the method to have
Effect reduces thick and large casting and produces shrinkage cavity because of shrinkage porosite, it is ensured that the qualification rate of product when using lost foam casting thick and large casting.
The present invention the technical scheme is that a kind of casting solving evaporative pattern thick strip thermal center point for achieving the above object
Method, comprises the following steps that: (one) makes the chill matched with thicker position outline on white mould in advance；(2) exist
After white molding is dried, at the external coating fireproof coating of white mould, and the fireproof coating on Bai Mo surface is dried；(3) at white mould
The outer surface brushing of upper thicker position contains the coating of zirconium English powder, then the coating that white mould external coating contains zirconium English powder is dried；
(4) chill is placed on Bai Mo the brushing position containing zircon flour coating, and installs to the white mould being cased with chill cast sandbox
In；(5) pouring into a mould under negative pressure, after cast, the thin film on casting sandbox opens at least two circulation pore, makes casting sandbox
Interior gas is circulated, and it is constant to keep casting negative pressure in sandbox, is all turned on casting the thin film on sandbox after foundry goods cools down,
Mould turnover takes out foundry goods, unloads chill.
The further technical scheme of the present invention is: in step (five), and after cast, the thin film on casting sandbox opens two
Circulation pore, two circulation pores between connected by air extractor, the air intake of air extractor and gas outlet respectively with two
Circulation pore connects.
The further technical scheme of the present invention is: in step (three), and in coating, zirconium English powder weight ratio is 60-70%.
A kind of casting method solving evaporative pattern thick strip thermal center point of the present invention has the advantages that on Bai Mo relatively
The outer surface brushing at thick position contains the coating of zirconium English powder, and chill is placed on Bai Mo the brushing portion containing zircon flour coating
Position, during lost foam casting, the heat absorption of foundry goods thicker position can be passed to chill, after cast by zirconium English powder rapidly
Thin film on casting sandbox opens at least two circulation pore, and heat can be shed by chill rapidly, it is to avoid foundry goods thicker
Position heat radiation is bad to be produced shrinkage porosite and affects casting quality, proves to use casting method of the present invention to produce through substantial amounts of experiment
Foundry goods is substantially without shrinkage porosite phenomenon, and conforming product rate is high, effectively reduces the production cost of foundry goods.
Below in conjunction with the accompanying drawings the casting method that solve evaporative pattern thick strip thermal center point a kind of to the present invention with embodiment make into
The explanation of one step.
Accompanying drawing explanation
Fig. 1 is the structural representation of the white mould of thick strip；
Fig. 2 is the other direction view of the white mould of thick strip shown in Fig. 1；
Fig. 3 is the structural representation on the white die sleeve of thick strip shown in Fig. 2 after chill；
Drawing reference numeral illustrates: the white mould of 1-thick strip, 2-thicker position, 3-chill.
Detailed description of the invention
A kind of casting method solving evaporative pattern thick strip thermal center point of the present invention, comprises the following steps that: (one) in advance
Making the chill matched with thicker position outline on white mould, the shape of chill according to the difference of white mode structure, and can set
Count into different structures, as long as chill can be fitted in the outer surface of thicker position on Bai Mo；(2) dry in white molding
After Gan, white mould external coating fireproof coating (fireproof coating can according to casting time temperature requirements and choose satisfactory,
Can directly buy, it is possible to buy raw material proportioning voluntarily and make), and the fireproof coating on Bai Mo surface is dried；(3) at white mould
The outer surface brushing of upper thicker position contains the coating of zirconium English powder, and in coating, zirconium English powder weight ratio is 60-70%, zirconium English powder conduct
Aggregate, remaining coating is fireproof coating, and fireproof coating weight ratio is 30-40%, what fireproof coating this area skill specifically chosen
Art personnel can choose according to founding materials and temperature；The determination of Bai Mo upper thicker position can be by experienced staff by casting
The structure of part determines, it is possible to determine according to many experiments, as can be first cast by conventional method, will easily produce the position of shrinkage cavity
Being set to thicker position, such as Fig. 1, the white mould of thick strip in 2, in Fig. 2, dashed region is the thicker position of Bai Moshang；The most again will
The coating that white mould external coating contains zirconium English powder is dried；(4) chill is placed on Bai Mo the brushing portion containing zircon flour coating
Position, chill to be made is close to the brushing position containing zircon flour coating, and installs to the white mould being cased with chill cast in sandbox；
(5) pour into a mould under negative pressure, after cast casting sandbox on thin film open at least two circulation pore, in the present embodiment,
After cast, the thin film on casting sandbox opens two circulation pores, is connected by air extractor, bleed between two circulation pores
The air intake of device and gas outlet are connected with two circulation pores respectively；In making casting sandbox, gas is circulated, and keeps casting
In making sandbox, negative pressure is constant, is all turned on casting the thin film on sandbox after foundry goods cools down, and mould turnover takes out foundry goods, unloads chill.
Using the evaporative pattern thick strip that casting method of the present invention casts out without shrinkage porosite phenomenon, conforming product rate is high, effectively
The problem solving evaporative pattern thick strip thermal center point, present invention process is simple simultaneously, low cost, easy popularization and application.
Above example is only presently preferred embodiments of the present invention, and the structure of the present invention is not limited to what above-described embodiment was enumerated
Form, all made within the spirit and principles in the present invention any amendment, equivalent etc., should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (3)
1. the casting method solving evaporative pattern thick strip thermal center point, it is characterised in that comprise the following steps that: () is pre-
First make the chill matched with thicker position outline on white mould；(2) after white molding is dried, on the surface of white mould
Brushing fireproof coating, and the fireproof coating on Bai Mo surface is dried；(3) on Bai Mo, the outer surface brushing of thicker position contains
The coating of zirconium English powder, whiter mould external coating is contained the coating drying of zirconium English powder；(4) chill is placed on brushing on Bai Mo and contains
There is the position of zircon flour coating, and install to the white mould being cased with chill cast in sandbox；(5) pour into a mould under negative pressure, cast
After casting sandbox on thin film open at least two circulation pore, in making casting sandbox, gas is circulated, and keeps casting model powder
In case, negative pressure is constant, is all turned on casting the thin film on sandbox after foundry goods cools down, and mould turnover takes out foundry goods, unloads chill.
A kind of casting method solving evaporative pattern thick strip thermal center point the most as claimed in claim 1, it is characterised in that in step
(5), in, after cast, the thin film on casting sandbox opens two circulation pores, between two circulation pores by air extractor even
Connecing, the air intake of air extractor and gas outlet are connected with two circulation pores respectively.
A kind of casting method solving evaporative pattern thick strip thermal center point the most as claimed in claim 1, it is characterised in that in step
(3), in, in coating, zirconium English powder weight ratio is 60-70%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016104387633 | 2016-06-17 | ||
| CN201610438763 | 2016-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106270394A true CN106270394A (en) | 2017-01-04 |
Family
ID=57615632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610710228.9A Pending CN106270394A (en) | 2016-06-17 | 2016-08-24 | A kind of casting method solving evaporative pattern thick strip thermal center point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106270394A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166661A (en) * | 2018-01-18 | 2018-06-15 | 深圳市大地幕墙科技有限公司 | A kind of method for manufacturing single-layer lattice shell and its rigid joint |
| CN113426979A (en) * | 2021-05-25 | 2021-09-24 | 芜湖泓鹄材料技术有限公司 | Manufacturing and using method of automobile stamping and drawing die solid casting section surface chilling block |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416437A (en) * | 2011-11-30 | 2012-04-18 | 宁夏长城须崎铸造有限公司 | Casting process of thick and large-section workbench |
| CN103100663A (en) * | 2011-11-10 | 2013-05-15 | 天津市立鑫晟精细铸造有限公司 | Method for eliminating lost foam cast shrinkage crack defects of screw conveyor products |
| CN103464682A (en) * | 2013-07-10 | 2013-12-25 | 马鞍山市海天重工科技发展有限公司 | Preparation method of hollow grinding balls |
| CN104942225A (en) * | 2014-03-31 | 2015-09-30 | 十堰市龙岗铸造有限公司 | Full mold casting molten iron introducing type chill |
| JP2016064428A (en) * | 2014-09-25 | 2016-04-28 | 志穂 日高 | Fire proof ceramic filler for initial layer slurry and precision casting mold using the same |
-
2016
- 2016-08-24 CN CN201610710228.9A patent/CN106270394A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100663A (en) * | 2011-11-10 | 2013-05-15 | 天津市立鑫晟精细铸造有限公司 | Method for eliminating lost foam cast shrinkage crack defects of screw conveyor products |
| CN102416437A (en) * | 2011-11-30 | 2012-04-18 | 宁夏长城须崎铸造有限公司 | Casting process of thick and large-section workbench |
| CN103464682A (en) * | 2013-07-10 | 2013-12-25 | 马鞍山市海天重工科技发展有限公司 | Preparation method of hollow grinding balls |
| CN104942225A (en) * | 2014-03-31 | 2015-09-30 | 十堰市龙岗铸造有限公司 | Full mold casting molten iron introducing type chill |
| JP2016064428A (en) * | 2014-09-25 | 2016-04-28 | 志穂 日高 | Fire proof ceramic filler for initial layer slurry and precision casting mold using the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166661A (en) * | 2018-01-18 | 2018-06-15 | 深圳市大地幕墙科技有限公司 | A kind of method for manufacturing single-layer lattice shell and its rigid joint |
| CN113426979A (en) * | 2021-05-25 | 2021-09-24 | 芜湖泓鹄材料技术有限公司 | Manufacturing and using method of automobile stamping and drawing die solid casting section surface chilling block |
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Application publication date: 20170104 |
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