Method and device for hardening foundry cores

Details Method and device for hardening foundry cores Method and device for hardening foundry cores

2006-05-02

2006-05-02

Lin, Kunag Y. (Department: 1725)

Metal founding

Means to shape a forming surface

Including means for compacting particulate fluent mold...

C164S016000

Reexamination Certificate

active

07036552

ABSTRACT:
The invention relates to a method for hardening foundry cores from sand-containing molding materials. The core, for the purpose of hardening it, is subjected to a catalyst vapor/gas mixture in a core molding tool (20). and then to a pressurized air flow, at a predetermined pressure and predetermined temperature, via a gassing plate (30) that can be coupled to the core molding tool in a gas-tight manner. The amine is, preferably during core injection, supplied to a heating and mixing stage (17) in liquid form and in a dosed manner and converted to its gaseous state. Once the gassing plate has been coupled to the core molding tool in a gas-tight manner, heated pressurized air is guided through the heating and mixing stage (17) charged with the amine gas within a predetermined time interval and with proportional pressure increase for gassing the tool in a time-controlled manner. From there, the gas is guided as a catalyst vapor/gas mixture through the sand-containing molding material in the core molding tool. Heated pressurized air is guided through the gassed sand-containing molding material in the core-molding tool within a predetermined time interval to rinse the tool in a time-controlled manner.

REFERENCES:
patent: 4132260 (1979-01-01), Luber
patent: 4362204 (1982-12-01), Moore et al.
patent: 4467855 (1984-08-01), Uzaki et al.
patent: 4483384 (1984-11-01), Michel
patent: 5971056 (1999-10-01), Bovens

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