Drawing and heat-setting device

Abstract

The invention discloses a drawing and heat-setting device, which is used for producing hollow fiber membranes and comprises a frame, a drawing system, a heating system and a transmission control system, wherein the drawing system, the heating system and the transmission control system are installed on the frame. The drawing and heat-setting device is characterized in that the heating system is positioned above the drawing system; the drawing system comprises a left-hand threaded and right-hand threaded screw, three polished rods and two drawing mechanisms in bilateral symmetry; the three polished rods are distributed in an inverted triangular form, and the left-hand threaded and right-hand threaded screw is disposed at the center of the inverted triangle and connected with the transmission control system; the heating system mainly comprises a heating tank and left and right screw lifting mechanisms connected with the same; the transmission control system controls screws of the lifting mechanisms to rotate in the same direction and drives the heating tank to move up and down or pause regularly; an inverted groove is reserved in the middle of the heating tank, and an infrared heating plate is mounted at the inner top of the groove; and the depth and the width of the groove are designed to fit with the length and the diameter of a drawing guide bar, and the length of the groove fits with a largest drawing distance of the drawing guide bar.

Description

technical field The invention relates to hollow fiber membrane manufacturing equipment technology, in particular to a stretching-heat setting device. The device is mainly used to prepare hollow fiber membranes. Background technique Hollow fiber membrane is one of the important types of separation membranes. It is widely used in the field of membrane separation technology because of its high packing density, no need for support materials, simple production process, and miniaturized devices. Stretching pore-forming method is one of the important methods for preparing separation membrane materials. Generally, hollow fiber membranes prepared from polyolefin materials adopt the method of uniaxial stretching to form holes. For example, the polypropylene hollow fiber obtained by melt spinning is stretched and heat-set at a temperature lower than the melting temperature of the polymer and higher than the initial annealing temperature, and a polypropylene hollow fiber microstructu...

AI Technical Summary

Problems solved by technology

When the multi-machine continuous stretching and heat setting process is adopted, the hollow fiber membrane is easily squeezed and deformed by the stretching roller, which affects its roundness and thus affects the hydrodynamic properties of the processed membrane module; the conventional batch method prepares the hollow fiber membrane The fiber membrane stretching and heat setting devices are easy to maintain the original roundness of the hollow fiber, but as the stretching process proceeds,

It is difficult to continuously adjust the required stretching temperature, which limits its application range

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