B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/661
B29C 47/88 (2006.01) B29C 44/34 (2006.01)
Patent
CA 1137717
Title: "Foam Extrusion Apparatus and Method" ABSTRACT OF THE DISCLOSURE An extrusion system for the production of foam boards, billets and the like products includes an ex- truder (20) at a first higher elevation (22) extruding foamable resin through a die in the upper end of an elongated vacuum chamber in the form of an inclined barometric leg (26) which extends at its lower end into a shallow but large surface area pool (39) of liquid such as water. An elongated shroud or hood (44) on the lower end of the leg reduces the pressure head of water above the foam product as it exits the leg and moves out of the pool for processing at a lower second elevation. The large area of the pool reduces its depth for a given volume and minimizes fluctuations in the level of the pool and the pressure head above the product when the vacuum changes. In one embodiment the pool extends beneath substantially the entire floor of the building (30) enclosing the second lower elevation (31) in which the subsequent processing occurs. In another embodiment the pool (165) extends beneath the leg with the pool also serving as structural footings for the support of the leg and the platform forming the first higher elevation.
363038
Macrae & Co.
Owens Corning
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