Plastic tube corrugator with mold blocks

Details Plastic tube corrugator with mold blocks Plastic tube corrugator with mold blocks

1994-11-14

1996-02-27

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

2642093, 264508, 264515, 264568, 425336, 425388, 425392, 425395, 425396, 425453, B29C 4428, B29C 4790, B29C 5330

Patent

active

054944309

ABSTRACT:
A machine for making plastic tubing including a plurality of separate carriages for carrying mold blocks about the continuous path. A mold train drive engages a selected number of carriages at the beginning of the mold tunnel to continuously drive the carriages along the mold tunnel. A shuttle drive follows the continuous path through a shuttle area and spaced from the path along a substantial portion of the mold tunnel, and includes first and second carriage engaging sections at substantially opposite points along the drive so that a carriage at the end of the mold tunnel becomes engaged by one shuttle drive engaging section while the other shuttle drive engaging section engages a carriage at the beginning of the mold tunnel. The shuttle drive accelerates when one of the carriage engaging sections enters the shuttle drive portion spaced from the continuous track path to disengage a carriage at the beginning of the mold tunnel, and decelerates to the speed of the mold train drive as an engaged carriage reaches the beginning of the mold tunnel.

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