Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1980-02-07
1981-04-07
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264118, 264124, 264141, 264145, B29C 1902
Patent
active
042605733
ABSTRACT:
A method and apparatus for forming pellets from wood particulate material: The apparatus comprises one or more parallel aligned, elongated dies formed by first and second aligned and mating continuous belts comprising a plurality of pads linked together. At least one of the belts has pads that contains a plurality of parallel longitudinal grooves in their free surface and the pads of the other belt are confrontingly aligned with the free surface of the pads of the first-mentioned continuous belt, to form the elongated dies. The wood particulate material, containing from 12 to 20% water, is cut, compacted, extruded and autogenously heated in the elongated dies by simultaneously rotating one of the belts counterclockwise and the other belt clockwise at respectively rotational speeds such that the linear speed of one of the belts is greater than the linear speed of the other.
REFERENCES:
patent: 2590757 (1952-03-01), Cornelius, Jr. et al.
patent: 2867843 (1959-01-01), Brown et al.
patent: 3493527 (1970-02-01), Schueler
patent: 3779686 (1973-12-01), Kertrula et al.
patent: 4086316 (1978-04-01), Ahrweiler et al.
Czaja Donald E.
Hall James R.
Moffitt Roy B.
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