Foundry curing system

Details Foundry curing system Foundry curing system

1998-07-01

2000-03-21

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523142, 523143, 524590, B22C 120

Patent

active

060403551

ABSTRACT:
A process of making sand cores and molds without the necessity of using an amine gas or sulphur dioxide gas to act as a catalyst by coating sand with a foundry resin which is capable of holding the sand in the proper shape after molding of the core or mold which foundry resin may be of a conventional construction. After the core or mold has been formed, hot air having a temperature of at least 180.degree. F. and in the range of from there to 1000.degree. F. is passed through the formed core to harden the core or mold at a rate sufficiently high to satisfy high production conditions without the necessity of toxic amines or sulphur dioxide.

REFERENCES:
patent: 4426484 (1984-01-01), Saeki et al.
patent: 4814012 (1989-03-01), Paul et al.
patent: 4851457 (1989-07-01), Kurple
patent: 5382608 (1995-01-01), Gardzielia et al.
patent: 5786409 (1998-07-01), Kurple

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