| 摘要 |
<p>A method of and apparatus for removing fins and other excess metal from metal castings in which the centrifugal force of a rotating member (16) propels impact pellets toward the casting. The mass of the moving pellets striking the fins must be sufficient to knock the fins off the casting and as a result the pellets must be of a large size. A plurality of radially extending blades (20) are mounted on the rotating member (16) and have inner ends (22) which terminate at positions spaced radially from the axis of rotation (18) of the rotating member. A supply conduit (24) extends into the space between the axis or rotation and the inner ends of the blades, and terminates at a distance from the path of the blade which is slightly greater than the largest diameter of the impact pellets. Impact pellets are fed into the conduit, whereupon air is introduced into the conduit at a force sufficient to pre-accelerate the pellets through the conduit and onto the inner ends of the blades.</p> |
