Importance

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Abstract

A cryogenic deflashing apparatus includes a plurality of serially oriented work stations and a conveyor for transporting articles to be deflashed past each of the stations. The work stations include (1) a prechill station connected to vapor compression refrigeration system to lower the temperature below ambient (2) a chill station connected to a cryogenic refrigeration system in which a cryogenic refrigerant such as liquid nitrogen is introduced into a closed coil adjacent the station for cooling the residual flash on the article to the embrittlement point while maintaining an atmosphere of air at the station and delivering the vaporized cryogen for use in other processes and (3) a deflashing station in which a blasting media such as plastic pellets are propelled against the article to remove the flash. An article carrying open mesh basket is also provided on the conveyor for orienting the article in a preselected attitude with respect to the blasting media pattern.

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First Claim