JPS56163057A - Resin-coated sand grain for shell mold - Google Patents
Resin-coated sand grain for shell moldInfo
- Publication number
- JPS56163057A JPS56163057A JP6688980A JP6688980A JPS56163057A JP S56163057 A JPS56163057 A JP S56163057A JP 6688980 A JP6688980 A JP 6688980A JP 6688980 A JP6688980 A JP 6688980A JP S56163057 A JPS56163057 A JP S56163057A
- Authority
- JP
- Japan
- Prior art keywords
- sand grains
- pva
- resol resin
- resin
- mixing
- 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 polyvinyl alcohol with a resol resin coating sand grains.
CONSTITUTION: A mixture of 100pts.wt. a resol resin and 5W50pts.wt. PVA is mixed with sand grains, whereby the resin-coated sand grains are obtained. Here, if the PVA 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 PVA and sand grains with the resol resin simultaneously or separately in arbitrary order at an arbitrary time from the start of its production until the end thereof. Otherwise, it is equally well to beforehand mix the resol resin and the PVA at a desired ratio, and to mix this mixture with the sand grains or to add the PVA after mixing the resol resin and the sand grains. It is possible to add auxiliaries such as calcium stearate and salicylic acid at the mixing.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6688980A JPS56163057A (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 |
|---|---|---|---|
| JP6688980A JPS56163057A (en) | 1980-05-20 | 1980-05-20 | Resin-coated sand grain for shell mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56163057A true JPS56163057A (en) | 1981-12-15 |
Family
ID=13328918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6688980A Pending JPS56163057A (en) | 1980-05-20 | 1980-05-20 | Resin-coated sand grain for shell mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56163057A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251938A (en) * | 2015-10-30 | 2016-01-20 | 彰武联信金莹铸造材料有限公司 | Production technology for precoated sand |
| WO2017086379A1 (en) * | 2015-11-18 | 2017-05-26 | 花王株式会社 | Binder composition for molding mold |
-
1980
- 1980-05-20 JP JP6688980A patent/JPS56163057A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251938A (en) * | 2015-10-30 | 2016-01-20 | 彰武联信金莹铸造材料有限公司 | Production technology for precoated sand |
| WO2017086379A1 (en) * | 2015-11-18 | 2017-05-26 | 花王株式会社 | Binder composition for molding mold |
| JPWO2017086379A1 (en) * | 2015-11-18 | 2018-09-06 | 花王株式会社 | Binder composition for mold making |
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