Process of using thermoplastic paste for the production of found

Details Process of using thermoplastic paste for the production of found Process of using thermoplastic paste for the production of found

1991-02-21

1992-06-09

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, C04B 3564

Patent

active

051204827

ABSTRACT:
A thermoplastic paste for the production of foundry mold cores comprises, per 100 parts by weight of mineral filler comprised of fused silica, zircon and cristobalite, between 0.2 and 0.5 parts by weight of a mold release agent, and an organic binder formed by at least 15 to 20 parts by weight of polyethylene glycol having an average molecular weight between 1400 and 1600. A process suitable for the production of foundry mold cores from such a paste comprises a shaping stage followed by a single firing cycle in four steps, namely:

REFERENCES:
patent: 3957715 (1976-05-01), Lirones et al.
patent: 4093017 (1978-06-01), Miller et al.
patent: 4190450 (1980-02-01), Robb et al.
patent: 4236568 (1980-12-01), Larson
patent: 4844148 (1989-07-01), Cuisin et al.

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