SU1730230A1 - Device for temperature control of complex yarn on the spinning machine - Google Patents

Abstract

Use - to control the temperature of the multifilament yarn on the spinning machine. SUMMARY OF THE INVENTION: In a device comprising a temperature sensor installed in a spinning shaft between the melting unit and a sizing unit, placed in a receiving casing and connected to a control device, the casing with its surface is coupled to the accompanying spindle of the splicing machine and is integral with it. the casing is made in the form of a balloon of a multifilament yarn, and the longitudinal axis of the cone is oriented along the direction of the thread movement. Matching the shape of the jacket to the shape of the balloon of the thread improves the heat exchange between the thread and the temperature sensor, which improves the measurement accuracy. 2 Il.

Description

(L

WITH

The invention relates to controlling the temperature of a yarn and can be used to control the temperature of a multifilament yarn on a spinning machine.

A device for controlling the temperature of the filament during melt molding is known, which contains a thermal converter and a control device.

The known device does not provide the required accuracy of temperature control due to the influence of pulsations of shop air flows.

It is also known to have a device for monitoring the temperature of a yarn on a spinning machine, comprising a temperature sensor located in a cylindrical housing disposed between the shafts.

The disadvantage of this device is also low temperature control accuracy. This is due to the fact that in the process of forming, the balloon of the multifilament yarn changes its diameter from 300 to 30 mm under the action of a stretching device. The diameter depends on the titer of the thread and the speed of the molding. In connection with this, the temperature sensor, when using a cylindrical housing, is removed from the multifilament yarn, which reduces the control accuracy.

The purpose of the invention is to improve the accuracy of measuring the temperature of the thread.

The goal is achieved by the fact that the device contains a mill installed in the spinning shaft between the melting unit and

one

CJ

about

you

with a sizing unit, a temperature sensor connected to the control device and placed in the receiving casing, which is associated with the accompanying shaft with its surface and not at the same time; The temperature sensor is placed on the inner surface of the casing on the thermal insulating gasket.

Figure 1 presents the setup; figure 2 is a variant of the installation of the sensor in the casing.

The installation (Fig. 1) includes a spinning unit 1, a spinneret 2, a blower shaft 3, a receiving casing 4 made in the shape of a multifilament balloon, for example, in the form of a truncated cone with a taper angle of about 60 °, whose longitudinal axis is oriented along the direction thread movements, temperature sensor 5, accompanying shaft 6, control device 7, oiling unit 8, oil seal 9, thermal insulating gasket 10.

The device works as follows.

The melt trickles extruded from the spinneret 2 of the spinning unit 1 are air cooled and form a thread.

When the complex yarn moves around the filaments, an air boundary layer is formed, which increases with distance from the spinneret and forms a closed air layer (wake). The thread, the passage of the sizing unit 8, is taken to the package.

To control the process of forming filaments from the melt, it is necessary to control the average temperature of the cocurrent air flow over the beam section (close to the filament temperature).

The receiving casing 4 directs the air flow, while ensuring laminar air flow and the isothermal nature of the air layer being monitored. This is achieved by matching the shape of the jacket to the shape of a balloon formed by a multifilament yarn, which improves the heat exchange between the filament and the temperature sensor and eliminates stagnant zones.

Studies have shown that the use of a receiving casing, the shape of which is similar to the shape of a multifilament yarn balloon, increases the sensor sensitivity by 2 ° C compared with the prototype.

Claims (1)

Invention Formula A device for controlling the temperature of the multifilament yarn on the spinning machine, including a temperature sensor installed in the spinning shaft between the melting unit and the sizing unit, placed in the receiving casing and connected to the control device, which, in order to improve the control accuracy, the receiving the casing with its surface is mated with the accompanying shaft of the spinning machine and is made with it at the same time, the inner surface of the receiving casing is made in the form of a balloon of a multifilament yarn, and the longitudinal axis of the casing oriented along the direction of movement of the thread. Air Fm.1 FIG. 2