Plastic tile corrugator and mold blocks

Details Plastic tile corrugator and mold blocks Plastic tile corrugator and mold blocks

1996-01-17

1997-07-08

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, 264568, 425336, 425369, 425388, 425392, 425395, 425396, B29C 4790, B29C 5330

Patent

active

056458711

ABSTRACT:
A machine for making plastic tubing including a plurality of separate carriages for carrying mold blocks about the continuous path. First and second wheel pairs on opposite sides of each carriage ride on first and second tracks respectively through a molding section of the path. An offset wheel is disposed between the wheels of each pair and rides on guide tracks associated with and facing oppositely to the first and second tracks respectively through the molding section. Each mold block is a plurality of sub-blocks secured end to end, with each sub-block having an arcuate face and corrugated with not more than one complete wavelength. Vacuum channels about sub-block end surfaces connect the block face to a vacuum port. Cooling water channels about sub-block end surfaces connect to water inlet and discharge ports for selectively circulating cooling water through the blocks, The mold block ports communicate with respective vacuum, water supply, and water discharge channels in a longitudinal supply tray along which the mold blocks travel through the molding section. 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.

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