POY (polyester pre-oriented yarn) spinning method and device by using FDY (fully drawn yarn) spinning device

Abstract

The invention relates to a POY (polyester pre-oriented yarn) spinning method and device by using a FDY (fully drawn yarn) spinning device. The POY spinning method is realized by using the FDY spinning device, wherein the FDY spinning device comprises a box body, a cross air blasting window, a chimney, a first hot roll, a second godet and a winding head. When the POY spinning is preceded, an oil tanker of the original FDY spinning device is stopped using, an oil nozzle is additionally arranged above the chimney for feeding oil, and a guide wire hook and combtype wire-dividing device of the first hot roll are provided with extension rods for moving outwards in a pre-network so as to move the spinning central line outwards; meanwhile, a second hot roll of the original FDY spinning device is stopped using, the first hot roll and the second godet are reserved, the filament bundling passes through the first hot roll for one time and winds 4-5 circles on the second godet for further moving the spinning central line outwards, and then enters into a wiring head for realizing winding. The method provided by the invention can produce high-quality POY on hot-roll type FDY equipment with the advantages of less transformation investment, simple method and fast transformation speed, thus realizing flexible production between the FDY and POY products at any time.

Description

technical field [0001] The invention relates to a method and a device for refitting an FDY device to produce POY. Background technique [0002] In order to adapt to the ever-changing market, many domestic manufacturers have realized the technological transformation of producing POY products on the FDY production line, and achieved good results. There are generally three methods: the first method is to use the original FDY device to directly produce POY; the second method is to remove the FDY heat roll and add a godet; the third method is to use the FDY heat roll, but the first heat roll Stretch even with the second hot roller. [0003] For the process transformation of the above three FDY devices to produce POY products, the first method has poor production stability and is generally difficult to succeed. The second and third methods have a large workload and investment, which is not conducive to the restoration of FDY production. [0004] Chinese invention patent applicat...

AI Technical Summary

Problems solved by technology

[0005] However, there are problems in the production of POY by the above-mentioned FDY equipment.

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