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Textured Metal Finishing

IP.com Disclosure Number: IPCOM000084769D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Curry, FP: AUTHOR [+4]

Abstract

Textured metal is useful for a number of purposes. One such use is on the inner face of a mold utilized for manufacturing plastic parts, where the plastic part is to have a textured finish which is the mirror image of the textured metal. The following method of producing textured metal provides a natural finish with a high gloss which requires no polishing after manufacturing.

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Textured Metal Finishing

Textured metal is useful for a number of purposes. One such use is on the inner face of a mold utilized for manufacturing plastic parts, where the plastic part is to have a textured finish which is the mirror image of the textured metal. The following method of producing textured metal provides a natural finish with a high gloss which requires no polishing after manufacturing.

In one application of this process to texturing carbon steel, the steel was first electropolished in a phosphoric acid electrolyte at a temperature of 175 Degrees F and a current density of 5ASI at 12 volts for 2 minutes, followed by further electropolishing at 3ASI at 9 volts for 1 minute. Subsequent to this electropolishing the metal was dipped in room temperature phosphoric acid for 30 seconds, rinsed, and placed in an electroless nickel plating bath for 45 minutes at 200 Degrees F. Following this treatment the plated metal was rinsed and dried.

The resulting nickel plated steel had a smooth uniform texture, without any sharp peaks. It also had a high gloss without further polishing. Both the gloss and texture were found to be highly reproducible from sample to sample. When surfaces of a mold utilized for making plastic parts were treated in this manner the resulting plastic parts, whether raw plastic or pigmented, exhibited good quality appearance, gloss and texture.

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