Title: Method of providing durable, slick sliding surfaces on extrusion forming apparatus, and the product thereof

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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Inventors: Prober, Maurice (Fairfield, CT, US)
Vostovich, Joseph Edward (Bridgeport, CT, US)

Application Number: 470398
Filing Date: 1974-05-16
Publication_date: 1976-03-09
Assignee: General Electric Company (New York, NY)
Primary Class(es): 425/461 29/89.5, 264/169, 264/338, 425/113, 425/135, 425/355, 427/135, 427/355
Other Classes:
US Patent Ref:

1733006	Oct, 1929	Cook et al.	427/355.
1900313	Mar, 1933	Stratford	427/355.
1900313	Mar, 1933	Stratford	117/64.
2403476	Jul, 1946	Berry et al.	425/DIG.
2515697	Jul, 1950	Cresswell	264/169.
2719073	Sep, 1955	Olson	264/169.
2863172	Dec, 1958	Buteux et al.	425/DIG.
2983570	May, 1961	Lux	117/132.
3113883	Dec, 1963	James	117/64.
3188239	Jun, 1965	Kloppers	264/39.
3628996	Dec, 1971	Weber	117/132.

Other Refs:
Primary Examiner: Gwinnell, Harry J.
Assistant Examiner:
Attorney: Simkins; Raymond G., Schlamp; Philip L., Neuhauser; Frank L.