Method of providing durable, slick sliding surfaces on extrusion

Details Method of providing durable, slick sliding surfaces on extrusion Method of providing durable, slick sliding surfaces on extrusion

1974-05-16

1976-03-09

Gwinnell, Harry J.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

264169, 264338, 425113, 427135, 427355, B28B 736, B05D 312

Patent

active

039429377

ABSTRACT:
The provision of a durable, slick sliding surface on metal faces of plastic forming extrusion apparatus such as extruder nozzles and dies. The durable, slick sliding metal surface is provided by burnishing and heat treating a polysiloxane fluid on the face of the metal. The burnishing comprises vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated, effectively over the entire surface treated.

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patent: 3188239 (1965-06-01), Kloppers
patent: 3628996 (1971-12-01), Weber

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