Browse Prior Art Database

MANDREL REPAIR USING PLASMA SPRAY COATING

IP.com Disclosure Number: IPCOM000027081D
Original Publication Date: 1995-Apr-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 52K

Publishing Venue

Xerox Disclosure Journal

Abstract

Electroforming mandrels used to electroform belts and the like are often fabricated from aluminum. These aluminum mandrels are very expensive. Before these mandrels can be used, they must be machined which is also expensive. While in use, these mandrels are often damaged physically and/or attacked chemically which render them useless. Indeed most mandrels are replaced because of physical damage which may be severe enough to cause them not to be reusable. There is a need for a way to repair the damaged mandrels.

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XEROX DISCLOSURE JOURNAL

MANDREL REPAIR USING PLASMA SPRAY COATING James E. McNamara William G. Herbert

Proposed Classification US. C1.029/402.01 Int. C1. B23p 6/00

Electroforming mandrels used to electroform belts and the like are often fabricated from aluminum. These aluminum mandrels are very expensive. Before these mandrels can be used, they must be machined which is also expensive. While in use, these mandrels are often damaged physically and/or attacked chemically which render them useless. Indeed most mandrels are replaced because of physical damage which may be severe enough to cause them not to be reusable. There is a need for a way to repair the damaged mandrels.

Disclosed is the repair of mandrels by applying a thickness of a metal such as aluminum over the surface of the damaged mandrel via plasma spray coating to a depth which fills the defects and allows remachining of the surface. Thus, by using the disclosed method, there is no need to purchase a new mandrel. Also, the disclosed method reduces machining costs since only the surface needs to be remachined; the ends and inside of the mandrel need not be remachined.

XEROX DISCLOSURE JOURNAL - Vol. 20, No. 2 March/April 1995 115

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116 XEROX DISCLOSURE JOURNAL - Vol. 20, No. 2 MarchlApril 1995

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