JPS574349A - Resin coated sand for shell mold - Google Patents
Resin coated sand for shell moldInfo
- Publication number
- JPS574349A JPS574349A JP7771980A JP7771980A JPS574349A JP S574349 A JPS574349 A JP S574349A JP 7771980 A JP7771980 A JP 7771980A JP 7771980 A JP7771980 A JP 7771980A JP S574349 A JPS574349 A JP S574349A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- coated sand
- sand
- coated
- resin coated
- 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 characteristics after charging for shell molds by coating a novolak type modified phonolic resin of specified infrared ray absorption spectra contg. cyclopentadiene type oil on molding sand.
CONSTITUTION: Cyclopentadiene type oil and the like of 100W50,000 centipoises viscosities at 25°C are alllowed to coexist in phenols and aldehydes and are caused to react, whereby a novolak type modified phenolic resin is obtained. This resin has 1.5W7.0 values in 750cm-1/820cm-1 in infrared ray absorption spectra. 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 |
---|---|---|---|
JP7771980A JPS574349A (en) | 1980-06-11 | 1980-06-11 | Resin coated sand for shell mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7771980A JPS574349A (en) | 1980-06-11 | 1980-06-11 | Resin coated sand for shell mold |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS574349A true JPS574349A (en) | 1982-01-09 |
Family
ID=13641689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7771980A Pending JPS574349A (en) | 1980-06-11 | 1980-06-11 | Resin coated sand for shell mold |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS574349A (en) |
-
1980
- 1980-06-11 JP JP7771980A patent/JPS574349A/en active Pending
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