Process for producing urethane die

Details Process for producing urethane die Process for producing urethane die

1989-10-04

1990-06-19

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156330, 1563309, 1563317, 264 464, 264 467, 2643281, 2491141, 249115, B29C 4516

Patent

active

049350854

ABSTRACT:
A process for producing a urethane die. A heat-resistant epoxy adhesive is applied to the inner surface of a recess provided in the body of a die. A urethane primer is applied to the adhesive while the adhesive is still in a semi-hardened state. A punch is inserted into the recess to form a space between the recess and the punch and a urethane resin is injected into the space to form a resin layer on the recess having a shape corresponding to the outer surface of the punch. A reinforcing fibrous material may be incorporated into the resin layer by applying a urethane resin having a lubricant incorporated therein to the surface of the punch and adhering a fibrous material impregnated with the urethane resin to the coated surface of the punch prior to inserting the punch into the recess. d

REFERENCES:
patent: 3101065 (1963-08-01), Kalis
patent: 3615071 (1971-10-01), Harper
patent: 3956451 (1976-05-01), Adams
patent: 4111024 (1978-09-01), Dahlman et al.
patent: 4542070 (1985-09-01), Ohtani et al.

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