Method of producing elastic roller whose external curved surface

Details Method of producing elastic roller whose external curved surface Method of producing elastic roller whose external curved surface

1995-02-09

1996-07-23

Davis, Robert

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

2989532, 264226, 264227, 264317, B29C 3338, B29C 3918

Patent

active

055386776

ABSTRACT:
An elastic layer is formed stably of constant shape without cutting of surface thereof and without difficult processing to make an internal surface of hollow in a mold into an off-right-circular cylinder shape. A matrix 1 is produced by shaping a periphery of rod material into an inverted crown shape of off-right-circular cylinder. Annular reinforcements 2, 3 are fixed on the both ends of inverted crown portion of matrix 1. The matrix 1 with the reinforcements 2, 3 is dipped in an electrolytic solution 5a, so that a nickel alloy is deposited over a surface of matrix 1 by electroforming to obtain a mold 4. The mold 4 is cut outside the reinforcements 2, 3 and a hollow for dissolution removal is perforated along the axis of matrix 1. The mold 4 is dipped in a corrosive solution which can dissolve only the matrix 1, so that only the matrix 1 is dissolved to remove away from the mold 4. The remaining mold 4 will have a hollow of inverted crown therein. An elastic material is injected into the hollow of inverted crown of mold 4 to form an elastic layer on a periphery of mandrel, thereby obtaining an elastic roller of inverted crown.

REFERENCES:
patent: 2842820 (1958-07-01), Brennan
patent: 3447221 (1969-06-01), Odiorne
patent: 3619446 (1971-11-01), Nauta
patent: 4050886 (1977-09-01), Moser
patent: 4250135 (1981-02-01), Orsini
patent: 5089201 (1992-02-01), Takahashi

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