GB1242933A - Multi-station blasting machines - Google Patents

Abstract

1,242,933. Conveyer systems. BADISCHE MASCHINEMFABRIK G.m.b.H. 20 June, 1969 [20 June, 1968], No. 31413/69. Heading B7L. [Also in Division B3] A multi-station blasting machine for engine blocks and cylinder heads comprises a plurality of work stations 2, 3, a plurality of driven workpiece carriers 14 in the form of cages movable by an endless conveyer unit 7, the unit and cages circulating in a plane close to the vertical, each cage having an open side through which a workpiece is loaded and closed side and being rotatable about an axis inclined to the horizontal such that the loading side is positioned above the closed side. The machine is formed with a housing 1 divided into a machining chamber 2 and a re-treatment and pre-treatment chamber 3 which chambers are separated by rotatable cylindrical locks 4, 5. Wheels 6 for centrifuging blasting media into the chamber 2 are mounted on the housing. A separate chain 7 is mounted in each chamber and has dogs 13 for engaging drive shafts 21 on the cages 14 for conveying the latter along a path through both chambers defined by rails 9. A guide shaft 15 with runners is secured to each drive shaft. The rails 9 are disposed in a plane 3 to 8 degrees from the vertical so that the cages 14 are inclined with their open ends above their closed ends. The chamber 3 has a station 22 at which a workpiece can be moved along an inclined plane by a pusher into a cage, the cage then being advanced through the cylindrical lock 5, which is rotated by a motor, by a driving rod 17<SP>1</SP>, 18<SP>1</SP>. In the machining chamber 2, drive motors 37, 38 rotate the cages in the lower and upper runs of the chain 7 by means of motors 37, 38 driving chains 40, 41 and shafts 30 carrying sprockets 31 and cams 32, the cams controlling the motors so that, if required, only one side of a workpiece is treated. The treated workpieces are then conveyed through the cylindrical lock 4 by a driving rod 17, 18 and are carried around the rails 9 by the chain in chamber 3 where they are rotated at station 24 and emptied of blasting media which is collected in a funnel. At the unloading station 23, the treated workpieces are removed from the cages by a tong device.