Process for producing foundry molds and cores from sand and a bi

Details Process for producing foundry molds and cores from sand and a bi Process for producing foundry molds and cores from sand and a bi

1988-09-28

1991-04-09

Seidel, Richard K.

Metal founding

Process

Shaping a forming surface

164159, 261DIG65, B22C 912

Patent

active

050056301

ABSTRACT:
In the process and apparatus for making molds and cores, a casing for producing molds or cores is filled with a mixture of foundry sand and a binder. The mixture is hardened by a reagent which is firstly evaporated and introduced into the casing from a cylindrical container with a carrier gas or air flow supplied from a pressure gas source. The reagent is fed into the container by a dosing pump. A vacuum, or pressure below atmospheric pressure is produced in the container by a vacuum pump. The vacuum leads to the reagent evaporating more quickly than at atmospheric pressure. It is consequently possible to use reagents with a high boiling point, so that the hardening of the molds and cores is obtained less expensively and with reduced odorous annoyance.

REFERENCES:
patent: 4051886 (1977-10-01), Ross
patent: 4064926 (1977-12-01), Naegele
patent: 4312397 (1982-01-01), Harris et al.
patent: 4362204 (1982-12-01), Moore et al.
patent: 4483384 (1984-11-01), Michel
patent: 4540531 (1985-09-01), Moy

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