JPS574350A - Resin coated sand for shell mold - Google Patents
Resin coated sand for shell moldInfo
- Publication number
- JPS574350A JPS574350A JP7772080A JP7772080A JPS574350A JP S574350 A JPS574350 A JP S574350A JP 7772080 A JP7772080 A JP 7772080A JP 7772080 A JP7772080 A JP 7772080A JP S574350 A JPS574350 A JP S574350A
- Authority
- JP
- Japan
- Prior art keywords
- coated sand
- resin
- sand
- resin coated
- phenols
- 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 provide resin coated sand of improved collapsing properties after charging by coating a novolak type modified phenolic resin contg. cyclopentadiene type oil and bivalent phenols on molding sand.
CONSTITUTION: Cyclopentadiene type oil and bivalent phenols of 100W50,000 centipoises viscosities at 25°C are allowed to coexist in univalent phenols and aldehydes, and are caused to react in the presence of an acidic catalyst, whereby a novolak type modified phenolic resin is obtained. If molding sand is coated by using this resin, the resin coated sand having good mold strength and molding characteristics and superior collapsing properties of cores or the like for shell molds is obtained. This coated sand is suited for aluminum alloy castings and the like.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7772080A JPS574350A (en) | 1980-06-11 | 1980-06-11 | Resin coated sand for shell mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7772080A JPS574350A (en) | 1980-06-11 | 1980-06-11 | Resin coated sand for shell mold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS574350A true JPS574350A (en) | 1982-01-09 |
Family
ID=13641717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7772080A Pending JPS574350A (en) | 1980-06-11 | 1980-06-11 | Resin coated sand for shell mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS574350A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4570039A (en) * | 1983-07-30 | 1986-02-11 | Casio Computer Co., Ltd. | Keyswitch structure |
-
1980
- 1980-06-11 JP JP7772080A patent/JPS574350A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4570039A (en) * | 1983-07-30 | 1986-02-11 | Casio Computer Co., Ltd. | Keyswitch structure |
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