초록 ▼

A continuous method of and system for fabricating thermoset polymer pellets wherein thermosetting polymeric resin material flows axially in a temperature controlled, mixer-extruder barrel while maintaining the material between a melt temperature and a higher thermosetting reaction temperature, and e

A continuous method of and system for fabricating thermoset polymer pellets wherein thermosetting polymeric resin material flows axially in a temperature controlled, mixer-extruder barrel while maintaining the material between a melt temperature and a higher thermosetting reaction temperature, and extrudes from the barrel at an extrusion temperature between the melt and reaction temperatures.The extruded material is formed into generally spheroidal pellets which are cooled in a transporting coolant liquid stream and charged to the interior of an open ended, centrifuge basket having a porous circumferential wall and an interior annular pusher plate. The wall is rotated to demoisterize the pellets by centrifugally removing liquid coolant and while reciprocating the pusher plate and basket relatively to displace the pellets axially along and off the basket wall. Pellets are taken from the basket wall without substantially fracturing them and forming an undue percentage of fines.

대표청구항 ▼

[ I claim:] [1.] A continuous method of fabricating thermoset polymer pellets comprising the steps of:a. flowing thermosetting polymeric resin material axially in a temperature controlled mixer-extruder barrel from a charge end of the mixer-extruder barrel to a discharge end while intermixing the ma

[ I claim:] [1.] A continuous method of fabricating thermoset polymer pellets comprising the steps of:a. flowing thermosetting polymeric resin material axially in a temperature controlled mixer-extruder barrel from a charge end of the mixer-extruder barrel to a discharge end while intermixing the material and maintaining the material between a melt temperature and a higher thermosetting reaction temperature;b. extruding the material from the barrel at an extrusion temperature between said melt and reaction temperatures through a multiple-orificed die and severing the extruded material into generally spheroidal pellets;c. pumping a coolant liquid stream to said die, entraining said pellets in the stream, and pumping said stream with entrained pellets through a conduit leading from the die in which the pellets cool directly to the interior of an open ended, axially extending centrifuge basket having a porous circumferential wall and an interior annular pusher plate interiorly adjacent said wall;d. receiving said pellets on the said wall and rotating said wall and pellets to develop sufficient centrifugal force to demoisterize the pellets by removing liquid coolant through said basket wall while reciprocating the pusher plate and basket relatively to displace the pellets axially along and off the basket wall; ande. receiving the pellets from the basket wall.