Method and apparatus for producing an extruded plastic bar with

Details Method and apparatus for producing an extruded plastic bar with Method and apparatus for producing an extruded plastic bar with

1981-06-08

1982-11-16

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264174, 264177R, 264237, 264327, 425113, 425325, 425378R, 425467, B29F 308

Patent

active

043594395

ABSTRACT:
The invention concerns the production of an extruded plastic sectional bar, or the like profiled element, having one longitudinally extending section which has a duller surface finish and another longitudinally extending section which has a less dull surface. To accomplish this, the extrusion tool, at the outlet end, has first and second temperature control devices so that as the bar is being extruded, the first section of the bar is exposed to one temperature while the second section of the bar is exposed to a different temperature, for producing the different surface finishes.

REFERENCES:
patent: 2904844 (1959-09-01), Smithies
patent: 3241182 (1966-03-01), Kessler
patent: 3508554 (1970-04-01), Sheridan
patent: 3525125 (1970-08-01), Berger et al.
patent: 3780152 (1973-12-01), Friesner
patent: 3811989 (1974-05-01), Hearn
patent: 4021172 (1977-05-01), Prinz
patent: 4229407 (1980-10-01), Craig

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