Production method of synthetic and yarn traverse device

Abstract

In the process of drawing/heat treating synthetic fiber thread melted and spun via a plurality of godet rollers and subsequently winding the same, accumulation of extraneous matter on the surface of the godet rollers may be prevented by performing multistage drawing/heat treatment while reciprocating the thread in the direction of the axis of rotation of the godet roller using the godet rollers at least two of which have surfaces having the roughness of 0.5<=Ra<=5 and one of which has a surface at a temperature of at least (melting point of synthetic fiber-70° C.), whereby occurrence of thread breakage or generation of fuzz may be prevented and synthetic fiber whereof the rate of operation can be increased and efficiency of manufacture is improved may be obtained.

Description

[0001] 1. Field of the Invention[0002] In the manufacture of synthetic fiber, especially, of industrial fiber formed by drawing / heat treatment of undrawn thread by the use of a plurality of godet roller groups, the present invention relates to a method of manufacturing high-strength synthetic fiber for maintaining drawing / heat treatment of synthetic fiber stable for a long term by resolving problems such as thread breakage or generation of fuzz to avoid accumulation of extraneous matters on the surface of high-temperature godet rollers, for increasing the rate of operation by reducing the number of times the machine have to be stopped for removing extraneous matters from the godet rollers, and for improving productive efficiency by reducing abrasion of the surface of the godet roller, and a thread traversing device to be used directly in the same method.[0003] 2. Description of the Related Art[0004] In the manufacture of synthetic fiber as typified by polyamide or polyester, among o...

AI Technical Summary

Benefits of technology

0052] When the thread is reciprocated by moving the thread converging guide, occurrence of a single filament breakage due to abrasion as a result that filaments are separated during movement of the thread guide may be prevented.

0053] The thread converging guide here serves to fix up the traveling thread during spinning and drawing of synthetic fiber, and is, more preferably, a guide for fixing up the spinning thread.

0054] As the method of reciprocating the thread converging guide, a method using means f or converting rotary motion into reciprocating motion, such as a method of converting rotary motion of the motor to reciprocating motion via a cam, a method of conversing rotary motion of the motor to reciprocating motion via a ball screw, a method of repeating linear motion of the cylinder to obtain reciprocating motion, and a method of converting to reciprocating motion via

Problems solved by technology

This drawing/heat treatment process of undrawn thread been suffering from such phenomenon that attachment and accumulation of extraneous matters dropped from the traveling thread on the surface of the godet rollers with time causes abnormal states of drawing, which has a serious impact on the quality/appearance and productive efficiency of fiber obtained.

The abnormal states of drawing here include winding of traveling thread on the godet roller, generation of fuzz due to breakage of a filament of the thread, and breakage of the thread itself due to increase in surface frictional force caused by the external matters attached and accumulated on the surface of the godet roller.

There is recognized an unfavorable phenomena that the extraneous matters attached and accumulated on the godet roller set at a high temperature near the melting point of polymer block heat transmission between the godet roller and the thread, which results in insufficient heat treatment of the thread, and thus variations in quality/appearance of the obtained drawn thread with time.

Since stain on the surface of the godet roller that is set to a high temperature may occur in relatively a short time, and may cause the abnormal states of drawing as described above, the process of cutting the thread compulsory regularly or every time the abnormal states are detected, and stopping the operation of the drawing machine to remove the extraneous matters on the godet roller is made frequently.

Therefore, the problem of lowering of the productive efficiency and of appearance of the product has been in the news.

However, in the manufacture of industrial fiber, a high-temperature heated roller is used as a godet roller in many cases, and thus the aforementioned scraper blade or the rotating brush cann

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