JPS56163055A - Resin-coated sand grain for shell mold - Google Patents
Resin-coated sand grain for shell moldInfo
- Publication number
- JPS56163055A JPS56163055A JP6688780A JP6688780A JPS56163055A JP S56163055 A JPS56163055 A JP S56163055A JP 6688780 A JP6688780 A JP 6688780A JP 6688780 A JP6688780 A JP 6688780A JP S56163055 A JPS56163055 A JP S56163055A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- sand
- mixing
- sand grains
- mold
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
PURPOSE: To obtain a mold which is extremely low in the coefft. of thermal expansion, and is high in mold strength such as cold bending strength by making combination use of a ketone resin with a resol resin coating the sand grains.
CONSTITUTION: A mixture of 100pts.wt. a resol resin and 5W50pts.wt. a kotone resin is mixed with sand particles, whereby resin-coated molding sand is obtained. Here, if the ketone resin is below the lower limit, the effect is not outstanding, and if it is above the upper limit, the degradation in mold strength is admitted. This coated sand is obtained by mixing the ketone resin and the sand grains simultaneously or separately in arbitrary order at an arbitrary time from prior to starting of production until the end thereof. Otherwise, it is equally well to beforehand mix both resins mentioned above at a desired ratio and to mix this mixture with the sand grains or to add the keton resin after mixing the resol resin and the sand grains. It is possible to add an assistant such as calcium stearate at the mixing.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6688780A JPS56163055A (en) | 1980-05-20 | 1980-05-20 | Resin-coated sand grain for shell mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6688780A JPS56163055A (en) | 1980-05-20 | 1980-05-20 | Resin-coated sand grain for shell mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56163055A true JPS56163055A (en) | 1981-12-15 |
Family
ID=13328855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6688780A Pending JPS56163055A (en) | 1980-05-20 | 1980-05-20 | Resin-coated sand grain for shell mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56163055A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4691756A (en) * | 1985-08-22 | 1987-09-08 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Molding material and mold |
| CN104841870A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Well-formed low-expansion cast precoated sand and preparation method thereof |
| CN106552902A (en) * | 2017-01-13 | 2017-04-05 | 承德北雁铸造材料有限公司 | Efficient anti-vein type precoated sand and preparation method thereof |
-
1980
- 1980-05-20 JP JP6688780A patent/JPS56163055A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4691756A (en) * | 1985-08-22 | 1987-09-08 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Molding material and mold |
| CN104841870A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Well-formed low-expansion cast precoated sand and preparation method thereof |
| CN106552902A (en) * | 2017-01-13 | 2017-04-05 | 承德北雁铸造材料有限公司 | Efficient anti-vein type precoated sand and preparation method thereof |
| CN106552902B (en) * | 2017-01-13 | 2019-01-18 | 承德北雁铸造材料有限公司 | Efficient anti-vein type precoated sand and preparation method thereof |
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