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US 4,193,253 AGranted
Spinning pot
AssigneeDornier System GmbH
InventorsWerner Herbert, Wunibald Kunz, Klaus Pimiskern
Life of this patent
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Abstract
A coating of a thermally hardened alloy of nickel and a nickel-phosphorus compound covers the internal face portions of a spinning pot which are engaged by the fibrous material being spun. The alloy produced from an electroless nickel plating solution is rolled to improve surface smoothness and density, and the rolled coating is heat treated to precipitate a portion of the phosphorus present in the form of a finely dispersed nickel-phosphorus compound. Silicon carbide may be dispersed in the coating to further increase its hardness.
Claims6
In a spinning arrangement, in combination:
- (a) a spinning pot having an axis and formed with a cavity of circular crosssection about said axis,
- (1) said pot having a bottom face transverse to said axis and axially bounding said cavity, and an axially extending, annular side face radially bounding an axially terminal part of said cavity open in a direction away from said bottom face,
- (2) said side face flaring from said terminal part inward of said cavity,
- (3) Respective axial portions of said bottom and side faces converging at an acute angle in a radially outward direction and defining a part of said cavity of greatest diameter;
- and
- (b) a coating of a thermally hardened alloy of nickel and a nickel-phosphorus compound covering at least said portions of said faces and having a surface exposed in said cavity,
- (c) a shaping disk is turned in the cavity of the pot in rolling engagement between the disk and the coating, producing a smoothing of said coating.
4 more elements
Dependencies are inferred from the claim text.