Abstract: A cryogenic deflashing apparatus is disclosed specifically adapted to rapidly remove residual flash from molded articles. The cryogenic deflashing apparatus incorporates a novel throw wheel assembly formed as a pump to create a vacuum utilized to continuously recirculate blasting media within the deflashing chamber. The throw wheel is powered by a pneumatic motor the exhaust of which is supplied to the intake port of the throw wheel to pre-accelerate the blasting media onto the throw wheel as well as supplement the magnitude of vacuum lift of the blasting media into the throw wheel. An article basket and basket drive mechanism is disposed within the deflashing chamber and includes biasing seal means for eliminating article spillover during the deflashing operation as well as facilitating ease in removal and insertion of the article basket within the deflashing chamber.

Abstract: A cryogen shot blast deflashing apparatus includes an upstanding frame which movably supports a receptacle assembly. The receptacle assembly includes an enclosure having a housing that enshrouds a rotatable drum, and a door which selectively opens and closes an open outer end of the drum. A throwing wheel is carried on the door for discharging particulate media and cryogen gas into the drum for impacting workpieces embrittling workpiece flash. A recirculation system is provided for withdrawing cryogen gas and particulates from the drum during operation of the machine, for separating reusable particulate media from particles of waste material such as workpiece flash, and for returning a controlled flow of pressurized cryogen gas and particulate media to the throwing wheel.

Abstract: A cryogenic deflashing apparatus is provided specifically adapted to remove residual flash from relatively large molded articles in a continuous high production deflashing operation. The apparatus incorporates a modular deflashing housing wherein entry, pre-freezing, blasting, and exit of multiple articles is accomplished simultaneously in discrete serially aligned operational compartments. A novel article conveyor transport mechanism is additionally provided which permits the transport speed of the articles through the various compartments to be independently varied during operation to maximize production efficiency.