Method for making retaining wall members

Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting

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26417716, 26417719, 264237, 425325, 4253791, B29C 4790

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active

056268076

ABSTRACT:
A method and apparatus for making U-shaped retaining wall members includes a combination of an extrusion die station, a calibration station, a heavy duty puller such as a tire puller and a travelling saw. The calibration station includes a series of calibration blocks which are spaced apart in an increasing fashion and controllably cooled to subject the extruded product exiting the extruding station to a controlled temperature gradient to prevent thermal shock.

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