SU939611A1 - Method of regulating the process of thermosplicing of chemosorption filament - Google Patents

Description

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The invention relates to the automation of technological processes and can be used in the manufacture of chemical fibers.

There is a known method for controlling the process of hardening a yarn, which consists in stabilizing the temperature of the yarn by changing the position of the thermoplasticizer.

However, this method is difficult to use because of the need to move the heater relative to the longitudinal axis of the thread and does not stabilize the degree of crosslinking of the thread.

The closest to the present invention is a method for controlling the process of thermal crosslinking of a chemisorption yarn based on acrylonitrile copolymers with pyridine monomers of the series by stabilizing the temperature of the thermoplasticizing chamber and the concentration of the crosslinking agent i2j.

However, the known method has limited possibilities in terms of improving the accuracy of stabilization of the degree of cross-linking of the chemisorption yarn due to changes in the characteristics of the feedstock.

The purpose of the invention is to improve the accuracy of stabilization of the degree of cross-linking of the chemisorption thread.

This goal is achieved by the fact that the temperature of the thermoplasticizing chamber is adjusted depending on the modulus of elasticity of the finished yarn in the method of controlling the process of thermal crosslinking of a chemisorption yarn based on copolymers of acrylonitrile with pyridine monomers of the pyridine row by adjusting the temperature of the thermoplasticizing chamber.

The drawing shows a block diagram of a control system implementing the proposed method.

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The method of controlling the process of thermoshing the chemisorption yarn is carried out as follows.

The chemisorbent thread 1 is fed to the thermotube machine from the molding section, stretched between two pairs of pulling rollers 2, is heated in the thermoplasticizing chamber 3 by means of the heating element t. The thermoplasticizing chamber 3 is controlled by an adjustment unit 5. The heating element f is connected to the power supply 6. In block 5, the control compares the settings of preset 1 "1 to 7 with the signals from temperature sensor 8 and corrects the supply voltage from source 6 of power supply.

The degree of cross-linking is determined by the min of the modulus of elasticity of the thread by the synal from sensor 9.

Using the measured modulus of elasticity of the yarn after thermoplasticizing chamber 3, it is determined to deviate from the set value, and the temperature of the thermogastiing chamber 3 is adjusted by setting unit 7 to change the setting, taking into account the modified value of the elasticity deviation. The magnitude of a given modulus of elasticity is determined individually for each assortment of yarn produced and equipment used.

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Adjusting the temperature of the thermoplasticizing chamber 3 depending on the modulus of elasticity of the finished yarn at a frequency of two times per shift ensures that the chemisorption properties of the yarn are maintained at a given time interval of operation.

Claims (2)

1. USSR Author's Certificate for Application No. 2656925 / 23-05, cl. D 02 J 1/22, 1978. 2. USSR author's certificate number 07921, cl. C 08 F 27/00, 1971 {prototype). /