Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Patent
1981-09-01
1982-12-07
Hoag, Willard E.
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
137340, 165141, 165155, 425378R, 425817C, B29D 702, B29F 308
Patent
active
043624820
ABSTRACT:
Disclosed is an apparatus for extruding thermoplastic compositions, comprising an extruder; a cooling device positioned downstream of the extruder for cooling the heat plastified thermoplastic resinous composition exiting from the extruder to a uniform temperature desired for extrusion through an extrusion die, the cooling device including at least one enclosed flow path for conveying the resinous composition from the inlet of the cooling device to the outlet of the cooling device, structure for circulating a cooling medium about the entire circumference of each of the resin flow paths and a device for maintaining a hydraulic balance between the inlet and the outlet of the cooling means across the entire cross-section of each of the resin flow paths; and an extrusion die positioned downstream of the cooling device.
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Cosden Technology, Inc.
Hoag Willard E.
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