Polishing plate and method for polishing surfaces

US4490948A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Friedrich Hanstein · Groß-Zimmern, DE
• Peter R. Szigeti · Büttelborn, DE

Key dates

• Filing date: Jul 6, 1982
• Grant date: Jan 1, 1985
• Expiry date: Jul 6, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24D13/18
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A polishing plate for polishing the surface of synthetic resins has a rigid disk and a compressible cover abutting a lower surface of the rigid disk. The rigid disk has an inlet opening formed centrally therein and a plurality of channels formed in the lower surface thereof. The cover has a plurality of layers including an upper layer of soft foam adjacent the lower surface of the rigid disk, a lower layer having a textile surface structure and which contacts a surface to be polished, and a middle layer which is permeable to liquid and interposed between the upper and lower layers. A method of polishing a surface has as its first step supplying a polishing agent to a central opening formed in a rigid disk. The polishing agent is then uniformly distributed to an upper portion of a cover which is adjacent a lower surface of the disk through a plurality of channels formed in the lower surface of the disk, the channels communicating with the central opening to allow the polishing agent to flow therethrough. Next, the polishing agent is supplied to a lower portion of the cover through a plurality of access openings formed in the cover and disposed below the channels. The polishing agent…