Centrifugal drum polishing machine

• US 4,073,095 A
• Filed: 01/17/1977
• Issued: 02/14/1978
• Est. Priority Date: 01/21/1976
• Status: Expired due to Term

• Current Assignee: Manfrid Dreher
• Original Assignee: Manfrid Dreher
• Inventors: Dreher, Manfrid
• Primary Examiner(s): Whitehead, Harold D.
• Application Number:
  US05/759,839
• Time in Patent Office: 393 Days
• Field of Search: 51/164, 51/163.2, 233/25
• US Class Current: 451/329
• CPC Class Codes: B24B 31/0218 the barrels are moving around two parallel axes, e.g. gyratory, planetary movement B24B31/033 takes precedence

Abstract

Apparatus for grinding and polishing small parts which is of the centrifugal drum polisher type, said apparatus including a stationary support, a rotor mounted on the support, and a plurality of drum containers mounted on the rotor and in frictional engagement with the stationary support so that the drum containers will rotate in response to rotation of the rotor.

Claims

1. A centrifugal drum polishing machine for simultaneous surface treatment of small parts, such as grinding and polishing by use of a treatment medium, comprising a stationary support, a rotor mounted on said stationary support for rotation around a vertical axis, and a plurality of drum containers of pot-like configuration which are adapted to be closed by covers and to contain the small parts and treatment medium, said drum containers being mounted on said rotor with their axes in vertical positions at the same radial distance from the axis of rotation of said rotor, each drum container being mounted for rotation about its own axis, said support having a running surface arranged coaxially to the axis of said rotor, and said drum containers being in a friction-drive relationship with said running surface for the purpose of rotating the drum containers in response to rotation of said rotor, said support having a contact ring encircling said axes and said running surface being the inside circumferential surface thereof, said rotor having the shape of an inverted dish with its outer periphery overlying said contact ring in close relationship so that an enclosure is provided by said support and said rotor, and said drum containers being supported on shafts which extend into the enclosure defined by said support and its contact ring and by said rotor, said frictional drive relationship being provided by an impeller on each shaft in frictional engagement with said running surface, and a drive motor mounted on the underside of said support, said drive motor having a drive shaft extending through said support into said enclosure and on which said rotor is mounted for rotation therewith.

2. The centrifugal drum polishing machine that is defined in claim 1, wherein each of said impellers carries an elastomeric ring around its outer circumference for making said frictional engagement with said running surface.

3. The centrifugal drum polishing machine that is defined in claim 1, wherein a housing is provided and said support is a false bottom thereof, the false bottom and the portion of said housing above said false bottom surrounding said rotor and said drum containers.

4. The centrifugal drum polishing machine that is defined in claim 1, wherein said rotor has a plurality of rotatable shafts located respectively on said axes, and a plurality of holding containers in which said drum containers are carried for their rotational movement about their axes, said drum containers having generally cylindrical configurations adapted to be closed at their tops and have horizontal cross sections that are non-circular, and said holding containers have cross sections corresponding in shape to the cross sectional shapes of said drum containers and of radial dimensions sufficiently larger than said drum containers to provide clearances therebetween while requiring corotation thereof.

5. The centrifugal drum polishing machine that is defined in claim 4, wherein the inside bottom walls of the drum containers have inverted dome shapes.