Method of manufacturing rubber sheet with rugged patterns formed

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...

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264175, 2641771, 264349, 425194, 425201, 425327, 425374, 425381, B29C 4732

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active

052346471

ABSTRACT:
A method of manufacturing a rubber sheet with rugged patterns formed on one side surface portion includes the step of preparing an apparatus including a rotating roll having rugged patterns, a member having an arcuate inner surface radially spaced apart from an outer peripheral surface of the rotating roll, and a die. The arcuate inner surface is recessed away from the rotating roll and defines an arcuate compartment chamber together with the outer peripheral surface of the rotating roll. The arcuate compartment chamber, has an inlet port and an outlet port. The die is placed in such a manner to adjoin to the outlet port portion of the compartment chamber, the die having an inner edge portion which is radially spaced apart from the outer peripheral surface of the rotating roll and defines an extrusive clearance together with the outer peripheral surface. The method further includes the steps of feeding a feed rubber into the arcuate compartment chamber through the inlet port thereof, kneading the feed rubber in the compartment chamber and moving the feed rubber from the inlet port toward the outlet port, and extruding the rubber sheet made of the feed rubber from the compartment chamber through the extrusive clearance.

REFERENCES:
patent: 2842796 (1958-07-01), Rhodes
patent: 2892212 (1959-06-01), Rhodes
patent: 2976565 (1961-03-01), Gyana
patent: 3143155 (1964-08-01), Knox
patent: 3871810 (1975-03-01), Geyer
patent: 4576563 (1986-03-01), Harada et al.
patent: 4732551 (1988-03-01), East et al.
patent: 5030079 (1991-07-01), Benzing, II

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