Plastic article or earthenware shaping or treating: apparatus – Shaping means and subsequent product treatment means
Patent
1975-03-05
1977-05-24
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Shaping means and subsequent product treatment means
100137, 100142, 425324R, 425308, 425384, 425407, B30B 100, B29J 500
Patent
active
040252787
ABSTRACT:
A board is formed by accumulating a mass of sugarcane rind fibers in a collection zone ahead of a horizontally reciprocable first-stage plunger that has a sweep face. The first-stage plunger is shifted horizontally toward a fiber compression zone to horizontally compact the sugarcane rind fibers and orient the fibers in vertical planes disposed substantially parallel to the sweep face. A second-stage plunger is shifted vertically downwardly from above the compression zone to push the horizontally compacted sugarcane rind fibers downwardly into a generally vertical passage means while vertically compressing the fibers. Consequently, the fibers are oriented in substantially horizontal planes to define a board segment comprised of sugarcane rind fibers having their axes disposed substantially parallel to the longitudinal axis of the board segment. The steps of accumulating, horizontally shifting, and vertically shifting are repeated to establish a column of abutting board segments in the extrusion passage. The board segments are heated at a heating station to melt natural resinous binder substances of the sugarcane rind fibers. Subsequently, the board segments are cooled at a setting station located below said heating station to reharden the natural resinous binder substances and bind together the board segments into a unitary board structure.
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patent: 3554117 (1971-01-01), Goldkuhle
patent: 3693541 (1972-09-01), Lombard et al.
patent: 3908538 (1975-09-01), Boyd
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