US 5,842,337 A · Rotor for open-end spinning machine

Abstract

A rotor for an open-end spinning machine. A spinning portion of a bottomed cylindrical body has a hollow portion where twisted yarn is formed by a continuous twisting operation while gathering short fiber groups in the maximum diameter portion of the spinning chamber. A rotary shaft is joined to the spinning portion. The spinning portion is made of a silicon nitride sintered body which includes no less than 60% silicon nitride grain having an aspect ratio not less than 3, and an average grain size of from 0.1 to 10 .mu.m. The rotor is hardly damaged at a high speed rotation of 100,000 r.p.m. or more, and the yarn strength and the yarn quality are not reduced even after an extended use of the rotor for a long time.

Claims11

Dependent claims

A rotor for open-end spinning machine for forming twisted yarn from short fiber groups, comprising:

a spinning portion having a substantially cylindrical body, the cylindrical body having a hollow portion defining a spinning chamber, the spinning chamber having a maximum diameter portion, wherein the twisted yarn is formed by gathering short fiber groups in the maximum diameter portion of the spinning chamber and continuously twisting the short fiber groups by a continuous twisting operation of the spinning chamber, and
a rotary shaft joined to the spinning portion,
the spinning portion comprising a silicon nitride sintered body comprising silicon nitride grains having an average grain size of between 0.1 .mu.m and 10 .mu.m, not less than 60% of said silicon nitride grains having an aspect ratio of not less than about 3.

Dependencies are inferred from the claim text.

Rotor for open-end spinning machine

Life of this patent

Rotor for open-end spinning machine

Life of this patent

Abstract

Claims11