Process and apparatus for extruding thermoplastic material

Details Process and apparatus for extruding thermoplastic material Process and apparatus for extruding thermoplastic material

B - Operations, Transporting

29

C

18/745

B29C 47/86 (2006.01) B29C 47/14 (2006.01) B29C 47/70 (2006.01)

Patent

CA 1058366

ABSTRACT OF THE DISCLOSURE This invention relates to a machine and process for extruding particular shapes in thermoplastic material, and more precisely, flat plates, corrugated plates and the like or, in general, shapes having one section much larger than the other. The process is particularly suited to eliminate the uneven feed of the molton material coming out from a die. In the process of the invention, the molten material discharged from an extrusion head is subdivided among a number of separate flow tubes which have cross sections and lengths such that the same pressure drop is created in the material flowing through each tube. The tubes are maintained at a predetermined temperature, and are positioned to discharge material to various zones of a die member, so that material flows into the die member at the same temperature and speed throughout the extrusion sections.

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