Clamshell corrugators and the like

Details Clamshell corrugators and the like Clamshell corrugators and the like

1993-09-08

1996-08-13

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

264571, 264DIG78, 425233, 4253261, 425336, 425388, B29C 3326, B29C 4904

Patent

active

055453694

ABSTRACT:
An improved, endless mold tunnel, clamshell-type, thermoplastic tube molding apparatus and method using exteriorly disposed, compressive roller elements and a cooperating keyway/matching lug assembly for maintaining the alignment of the independent mold blocks and mold block half sections substantially orthogonal relative to opposed half sections and relative to the contiguous upstream and downstream mold blocks in said tunnel while allowing for the introduction of cooling fluid or vacuum.

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