Vaulted screw/grooved barrel extrusion machine, method and syste

Details Vaulted screw/grooved barrel extrusion machine, method and syste Vaulted screw/grooved barrel extrusion machine, method and syste

1988-01-04

1989-05-23

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

26421121, 26421123, 366 76, 366 79, 366 89, 366 99, 425190, 425208, 425209, 4253823, B29C 3500, B29C 4738, B29C 4760, B29C 4780

Patent

active

048328898

ABSTRACT:
Extrusion process and apparatus, the apparatus including an extrusion barrel having axial grooves which extend through the feed section and solids conveying section and disappear at the exit end of the compression section. The apparatus also includes a helical thread extrusion screw having a maximum channel depth in the feed section, which depth disappears at the exit end thereof. The process and apparatus causes plastic extrusion composition to be packed as a non-rotating mass to fill the solids-conveying and compression sections and increase the dead head pressure and extrusion output of the apparatus.

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