Blocking device of the unwinding of threads from the feeding bobbins of a double-torque twister

Abstract

Blocking device of the unwinding of the threads from the feeding bobbins of a twisting spindle with superimposed bobbins (1,2) inserted on their hollow pin (10,11), in which the threads are blocked with mechanical interceptors (48) brought into their unwinding range at the entrance of the respective hollow pins (10,11) and activated by means of sensors (70) of the twisted thread situated downstream of the thread-guide curl.

Description

technical field [0001] This invention relates to double-torque twisting, and more particularly to the control of yarn fed to a twisting machine. Background technique [0002] The twisting operation consists in combining two or more yarns by twisting them together about their longitudinal axis, so as to produce a new high quality, more resistant to friction and wear, more uniform and appearance and Yarn with improved hand. [0003] Twisting can be carried out by either feeding two or more yarns which have been wound parallel to each other and combined by a doubling machine; Individual yarns are drawn from approximately conical stacked bobbins. The invention can be effectively applied to this latter type to achieve twisting from two bobbins of yarn without an intermediate step of combining or doubling on a doubling machine. [0004] In order to better understand the technical problems involved in twisting, as well as the features and advantages of the technical solution acc...

AI Technical Summary

Problems solved by technology

[0023] The whole operation is difficult, especially for machines with tangential drive, because considerable stress is required to separate the drive belt, which causes an increase in the tension of the belt and thus overloads the mechanical elements

This overload is especially dangerous when interfering with several twisting spindles F, e.g. in lifting operations when all spindles have been stopped

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