Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent
1978-10-25
1981-07-14
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of gaseous process material
264 403, 264 406, 264 407, 264 454, 264 51, 264 83, 264216, 425 4C, 425 89, 425115, 425144, 425145, 425149, 425182, 425224, 425817C, 425DIG2, B29D 2704, B65G 5302, B29C 2500
Patent
active
042786240
ABSTRACT:
Material such as panels, boards, and flexible sheets are produced and processed while passing between two or more surfaces at least one of which has a thin layer of pressurized fluid in direct contact with the product. While in this process zone, the item is shaped, coated, smoothed, textured, heated, cooled, compressed, dried, and/or impregnated. For example, expandable resin is deposited in a continuously formed bag of upper and lower sheet material so that the resin may expand and cure as it is drawn in through a fixed rigid mold having upper and lower (and perhaps side) porous material walls through which pressurized fluid is passed to provide a fluid bearing support and molding surface. The temperature, pressure and flow of the fluid is monitored and controlled separately at spaced locations along the length of the mold to control curing rate, foaming rate, surface characteristics and resistance of material moving through the mold. The surfaces may be planar or curved and may be parallel or variably separated in lateral cross-section. They may also be planar or curved and parallel or variably separated in longitudinal cross-section. The fluid layer is formed by passing a fluid under pressure through a porous wall having the shape of the desired fluid film configuration. This film of fluid moves across the surface of the item being processed, separating the item from the wall to eliminate sliding friction while subjecting the item to pressure, and/or heat, heat loss, absorption, evaporation and impingement.
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Anderson Philip
Beall, Jr. Thomas E.
Kornylak Corporation
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