JPS55149744A - Resin-coated sand particle for casting - Google Patents
Resin-coated sand particle for castingInfo
- Publication number
- JPS55149744A JPS55149744A JP5698579A JP5698579A JPS55149744A JP S55149744 A JPS55149744 A JP S55149744A JP 5698579 A JP5698579 A JP 5698579A JP 5698579 A JP5698579 A JP 5698579A JP S55149744 A JPS55149744 A JP S55149744A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- bisphenols
- sand
- type phenolic
- novolak type
- 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)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
PURPOSE: To eliminate the cracking and dimensional defect of castings of the shell mold using the captioned sand particles obtained by coating the sand particles by the resin comprising modifying novolak type phenolic resin by bisphenols and cumarone compounds as a binder.
CONSTITUTION: A suitable amount of formadehyde based on the total weight part of bisphenols and phenol is added to the mixture of the suitable ratios of bisphenols, phenol and cumarone compounds and the modified novolak type phenolic resin used as this binder is produced in the presence of acidic catalysts by using the reaction conditions and operation methods commonly used in the manufacture of novolak type phenolic resins. This modified novolak resin is mixed with the sand particles at an arbitrary ratio by a known method, whereby the sand particle surfaces are coated with the resin. If necessary, it is possible to contain assistants such as calcium stearate and waxes in this coated sand.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5698579A JPS55149744A (en) | 1979-05-11 | 1979-05-11 | Resin-coated sand particle for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5698579A JPS55149744A (en) | 1979-05-11 | 1979-05-11 | Resin-coated sand particle for casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55149744A true JPS55149744A (en) | 1980-11-21 |
Family
ID=13042780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5698579A Pending JPS55149744A (en) | 1979-05-11 | 1979-05-11 | Resin-coated sand particle for casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55149744A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04168118A (en) * | 1990-10-31 | 1992-06-16 | Aisin Chem Co Ltd | Novolak type phenol resin for shell mold |
EP1864728A4 (en) * | 2005-02-16 | 2008-10-15 | Asahi Organic Chem Ind | Resin-coated sand for multilayered casting mold |
CN104889313A (en) * | 2015-04-24 | 2015-09-09 | 北京仁创科技集团有限公司 | Coated sand preparation method |
-
1979
- 1979-05-11 JP JP5698579A patent/JPS55149744A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04168118A (en) * | 1990-10-31 | 1992-06-16 | Aisin Chem Co Ltd | Novolak type phenol resin for shell mold |
EP1864728A4 (en) * | 2005-02-16 | 2008-10-15 | Asahi Organic Chem Ind | Resin-coated sand for multilayered casting mold |
CN104889313A (en) * | 2015-04-24 | 2015-09-09 | 北京仁创科技集团有限公司 | Coated sand preparation method |
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