JPS55103253A - Molding sand composition - Google Patents

Molding sand composition

Info

Publication number
JPS55103253A
JPS55103253A JP1175279A JP1175279A JPS55103253A JP S55103253 A JPS55103253 A JP S55103253A JP 1175279 A JP1175279 A JP 1175279A JP 1175279 A JP1175279 A JP 1175279A JP S55103253 A JPS55103253 A JP S55103253A
Authority
JP
Japan
Prior art keywords
mixture
molding sand
mold
added
water glass
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
Application number
JP1175279A
Other languages
Japanese (ja)
Inventor
Shuji Sato
Tadahiro Sugamura
Shigeru Kusaka
Junzo Oota
Satoshi Obana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP1175279A priority Critical patent/JPS55103253A/en
Publication of JPS55103253A publication Critical patent/JPS55103253A/en
Pending legal-status Critical Current

Links

Landscapes

  • Mold Materials And Core Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PURPOSE: To improve the collapsing characteristic and reclamation of mold and reduce the decrease in strength and surface stability by adding collapsing agents to molding sand then adding water glass and keading the mixture and further adding acrylic acid base polymer and kneading the mixture.
CONSTITUTION: An aqueous solution of concentration about 5W60% of one or more kinds of collapsing agents such as styrene-maleic acid copolymer is added at about 0.5W30 parts to 100pts.wt. of molding sand and the mixture is kneaded. Thence, water glass of molar ratio 1.8W3.4, 34W54 Baume is added at about 0.5W10 parts and the mixture is kneaded, following to which the aqueous acrylic acid base polymer solution of concentration about 5W60% is added at about 0.5W10 parts, followed by kneading. The mold using this multilayer coated molding sand is suppressed of the moisture absorption of water glass owing to the action of the polymer of the outermost layer, resulting in the decreased bonding force among the sand particles. Even when this mold is put for a long time, there is no decrease in its strength and surface stability and the moldings of stable quality may be produced with good workability.
COPYRIGHT: (C)1980,JPO&Japio
JP1175279A 1979-02-02 1979-02-02 Molding sand composition Pending JPS55103253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1175279A JPS55103253A (en) 1979-02-02 1979-02-02 Molding sand composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1175279A JPS55103253A (en) 1979-02-02 1979-02-02 Molding sand composition

Publications (1)

Publication Number Publication Date
JPS55103253A true JPS55103253A (en) 1980-08-07

Family

ID=11786726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1175279A Pending JPS55103253A (en) 1979-02-02 1979-02-02 Molding sand composition

Country Status (1)

Country Link
JP (1) JPS55103253A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495980A (en) * 1981-10-10 1985-01-29 Bcira Binders for foundry cores and moulds
US4585809A (en) * 1983-02-17 1986-04-29 Rohm Gmbh Resin binders for foundry molding sands
CN104475660A (en) * 2014-11-03 2015-04-01 繁昌县琦祥铸造厂 Rare earth-containing foundry molding sand and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495980A (en) * 1981-10-10 1985-01-29 Bcira Binders for foundry cores and moulds
US4585809A (en) * 1983-02-17 1986-04-29 Rohm Gmbh Resin binders for foundry molding sands
CN104475660A (en) * 2014-11-03 2015-04-01 繁昌县琦祥铸造厂 Rare earth-containing foundry molding sand and preparation method thereof

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