Multistation blast processing apparatus

A multistation blast processing apparatus comprising

• a blast housing having a generally cylindrical shape, a generally horizontal axis and an open side in the upper part of said housing;
• workpiece conveying means rotatable about said generally horizontal axis for supporting a plurality of workpieces, said conveying means including
• a plurality of walls for separating the interior of said housing into at least two chambers, said chambers being rotatable to be sequentially positionable at a loading and unloading station adjacent said open side of said housing and to at least one blast processing station within said housing,
• holding means at each of said chambers for clamping two axially spaced workpieces therein, said holding means being rotatable to rotate said workpieces about an axis generally parallel with the axis of rotation of said conveying means,
• each of said chambers including a power driven shaft extending parallel with said generally horizontal axis and a belt-like element coupling said shaft to said holding means,
• and wherein each said driven shaft carries a drivable wheel, the shaft and wheel being rotatably translated with said conveying means, and
• each of said blast processing stations includes a power driven wheel located to engage said drivable wheel when the chamber associated with said shaft and wheel is moved to the station so that said driven and drivable wheels are actively coupled to each other for rotating said shaft;
• and
• means on said housing for propelling a blasting agent toward a workpiece at said at least one blast processing station;
• a control disc on each of said shafts;
• and
• control means mounted on said housing and engageable by said control disc for stopping said holding means in a predetermined position.