Process and device for extruding a calibrated profile of a therm

Details Process and device for extruding a calibrated profile of a therm Process and device for extruding a calibrated profile of a therm

1994-05-09

1996-09-10

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

156107, 156108, 264141, 26417716, 264252, 425145, 425146, 425217, B29C 4702, B29C 4730

Patent

active

055543251

ABSTRACT:
For the extrusion of a calibrated profile of a thermoplastic polymer onto articles, the polymer, which is melted in an extruder (17), is fed, via a heated pressure hose (22), to an extruder head guided by a robot (5) and, by means of said extruder head, extruded and deposited on the article. At the end of each extrusion operation, the material flow to the extruder head is maintained and, by means of a change-over valve within the extruder head, redirected into an outlet orifice provided in the vicinity of the die orifice until the commencement of the subsequent extrusion operation. The redirected material flow emerges from a pipe connector (29) which is arranged on the extruder head and is coupled to a coupling piece (33). The material collected in this manner may be pelletized and fed back to the feed hopper (16) of the extruder (17).

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patent: 5382395 (1995-01-01), Hoenke
patent: 5445780 (1995-08-01), Yada et al.

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