Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1980-04-21
1982-03-09
Kimlin, Edward C.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
100144, 100156, 100160, 100168, 156324, 156581, 156582, 156 79, 264 463, 425335, 425337, 4283044, B32B 3120, B32B 520
Patent
active
043187617
ABSTRACT:
A plastics foam-forming mixture (31), e.g. a polyurethane or polyisocyanurate foam mix, deposited from one or more static dispensers (19) is metered through two spaced opposed members (14 and 18) forming between them a metering gap. At least one of the members having a plurality of faces of different profile and being rotatable to present to the other member a selected face appropriate to the thickness of foam board to be produced. Reduces "crowning" of foam boards while permitting foam boards of different thicknesses to be made without having to replace metering bars.
REFERENCES:
patent: 3942927 (1976-03-01), DeMets
patent: 4019938 (1977-04-01), Forrester
"A New Development Machine for the Continuous Lamination of Rigid Urethane Foam," Rubber and Plastics Age, vol. 47, No. 1, (1966), pp. 57-59.
Buist, J. M., "Advances in Urethane Rigid Foam Processes and Applications," J. of Cellular Plastics, vol. 1, No. 1, (Jan. 1965), pp. 13-18.
Dockray Edward
Hodgson Victor F.
Dawson Robert A.
Imperial Chemical Industries Limited
Kimlin Edward C.
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