Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1978-10-16
1980-11-11
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
264177R, 264177F, 4251311, 425465, D01D 520, B29D 700
Patent
active
042332591
ABSTRACT:
A method of and extrusion press for producing profiled strands from elastomeric material, especially undulated edges, for conveyor belts, including a linear base and a ridge placed on the base. Portions of the strand change direction along its length. The extrusion press method is used, and different flow velocities are imparted to the elastomeric material at different portions of the cross section of the strand. The extrusion press is equipped with a nozzle plate having profile openings corresponding to the cross sectional shape of the desired profiled strand. On that side which faces the press equipment--including wormgear, piston, and rollers--the nozzle plate is equipped with approach surfaces, which lead to the profile openings at angles inclined to the direction of extrusion, and which have different lengths in different cross-sectional regions of the profile openings. On that side which faces away from the press equipment, the extrusion press is provided with guide elements which are spaced from one another, extend in the direction of extrusion, and define or limit the transverse movement of the exiting profiled strand.
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Pietratus Udo
Rothemeyer Fritz
Continental Gummi-Werke Aktiengesellschaft
Woo Jay H.
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