Ring for spinning and twisting machines
AssigneeKanai Juyo Kogyo Co., Ltd.
InventorsYuzuru Nakano, Takeshi Yoshikawa
Life of this patent
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Abstract
A ring for spinning comprising a flange portion, a neck portion and a trunk portion having a ring rail fitting-in part for use on ring spinning machines, twisting machines, etc. At least that portion of the ring which will contact a traveller is formed of ceramics, or the surface of said portion is formed of a ceramic coated layer, to attain high strength of the surface, smoothness in the surface, improved abrasion resistance, improved heat resistance, improved corrosion resistance and high spindle speed of more than 20,000 r.p.m.
Claims7
In a ring for a spinning or twisting machine comprising a flange portion, a neck portion and a trunk portion having a ring rail fitting-in part, the improvement wherein at least that part of the flange portion which is to contact a traveller (1) consists essentially of fine ceramics which prior to sintering have a grain size of less than 3 .mu.m and after sintering have a grain size of less than 10 .mu.m, and (2) has a surface coarseness of less than 5 .mu.m R max.
In a ring for a spinning or twisting machine comprising a flange portion, a neck portion and a trunk portion having a ring rail fitting-in part, the improvement wherein at least a part of the surface of the flange is coated with a layer of nickel, and an electroless-coated layer of a nickel-phosphorus alloy as matrix in which fine ceramic particles having a grain size of less than 10 .mu.m exist as eutectoid substance, is formed on said nickel layer.
Dependencies are inferred from the claim text.