Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1987-08-10
1989-06-27
Dawson, Robert A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156242, 156278, 264241, 264320, 428412, B32B 3112, B32B 1710
Patent
active
048426644
ABSTRACT:
A process of imparting a predetermined curvature to a sheet of thermoplastics material in which a thermoplastics sheet is bent by placing it against a face of a bending form. The form having a moulding surface area of the required curvature. The process includes heating the thermoplastics sheet and causing or allowing it to conform to the moulding surface area. The thermoplastics sheet is formed oversized and is bent by placing it against a bending form having a moulding surface area portion of the required dimensions and curvature which is surrounded by a bending form surround. Next, the thermoplastics sheet is heated and caused or allowed to conform to the moulding surface area portion while its oversized margins are supported by the bending form surround. Thereafter, the thermoplastics sheet is cooled at a rate slow enough to maintain such conformity, and then the thermoplastics sheet is trimmed to size.
REFERENCES:
patent: 3808077 (1974-04-01), Rieser et al.
patent: 4328277 (1982-05-01), Molari
patent: 4445953 (1984-05-01), Hawk
Dawson Robert A.
Glaverbel
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