Patent ID: 9193035
Filing Date: 2015-11-24
Classification: B24C

Abstract:
1. A shot-blasting machine comprising: a cabinet, a rotary drum that has holes, and a centrifugal shooting machine, wherein the rotary drum is configured to move, within the cabinet, forward and backward around a horizontal shaft that passes through a central axis of the rotary drum to move through operating positions for feeding materials to be processed, for processing the materials, and for taking out the materials, wherein the cabinet has a cover for shutting an opening for feeding the materials to be processed and taking out the materials, and the cabinet having on a side of the opening a wall for sealing that consists of a ceiling, a base, and two side walls, wherein the cover is integrated with the rotary drum to be movable forward and backward around an axis, the cover comprising upper and lower arc portions that can fit the wall for sealing, a string portion for connecting a front side of the upper arc portion to the front side of the lower arc portion, and two side portions that enclose the space between the string portion and the upper and lower arc portions, wherein a seal is formed by at least a line of a lip seal that is provided at gaps between the upper and lower arc portions and the two side portions of the cover and the wall for sealing, wherein the seal comprises three lip seals and is fixed to the ceiling of the wall for sealing so as to contact the upper arc portion, wherein the cover comprises a conducting slit located at a medium height, the conducting slit extending horizontally, wherein a mechanism for returning the shots is provided, the mechanism returning the shots from an upper and front portion to a back and lower portion of the cover via the conducting slit so that the shots that fly outside the cabinet during a shot-blasting operation are returned to an inside of the cabinet, and wherein a non-return flap for shutting the conducting slit of the mechanism for returning the shots is provided to a back side of the cover.