JPS5938472Y2 - Stretch heat treatment tank - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of a drawing heat treatment bath for drawing and heat-treating (annealing) synthetic fibers such as hand fibers, tapes, and monofilaments.

Conventionally, the drawing and heat treatment process of synthetic fibers was carried out continuously by placing a heated drawing tank and a heat treatment tank separately and in series.
In order to reduce the cost of the heating and stretching tank, a structure has been devised in which the heating and stretching tank is also used as a heat treatment tank, and after stretching, the same type of film is passed through the tank again for annealing.

For example, Special Publication No. 48-44665, Utility Publication No. 48-146
This can be seen in the invention and idea published in Publication No. 79.

However, in these known drawing heat treatment tanks, several guide rollers are arranged in the tank to allow the synthetic fibers to pass through and reverse, so the bearing mechanism of the guide rollers in the heating liquid (high temperature) There were problems with this, such as frequent accidents and the high cost of the special bearing mechanism.

In view of the above-mentioned points, this invention provides a drawing heat treatment tank having a structure that allows the synthetic fiber fiber to pass through the tank by turning around several times without providing guide rollers in the tank.

An embodiment of the drawings will be described below.

FIG. 1 is a schematic vertical cross-sectional view of the drawing heat treatment tank of this invention, and FIGS. 2 and 3 are views showing an example of a partition plate.

In the drawing, 1 is a heated stretching tank, 2 is a first stretching roller, 3 is a second stretching roller that is rotated at a speed that is usually 7 to 7.5 times faster than the first stretching roller 2, and an extruder. Synthetic fiber fibers (hereinafter simply referred to as fibers) that have been formed into threads or tapes from (not shown) and guided through a cooling tank (not shown) are first stretched roller 2 and second stretched roller 3. The material is stretched and stretched due to the difference in circumferential speed between the two.

For this stretching, a heated stretching tank 1 is arranged between both rollers 2 and 3.

That is, the fibers Y are drawn while being heated, and this is already well known.

4, 5 and 6 are guide rollers, respectively.

After drawing, the filament Y1 must be annealed for the purpose of crystal stabilization.

As already mentioned, the heat treatment bath is also used as a heating and stretching bath for stretching during this annealing.

That is, the stretched filament Y1 is passed through the heated drawing tank again and again (reverse passage), and this invention is designed to make it possible to easily and effectively pass through the heated drawing tank several times. This is a drawing heat treatment tank 1 that has been improved.

The structure of this tank 1 will be explained below according to an embodiment shown in the drawings.

One feature of the drawing heat treatment tank 1 of this invention is that the tank walls at both ends in the direction of passage of the fibers Y1 to Y3 are composed of partition plates having horizontal gaps. In the example, the tank is formed of three stages of partition plates 7, 8, and 9 having gaps a and b, and heated liquid such as hot water is forcibly and continuously supplied by a pump P into the tank.

Therefore, the heated liquid flows out from the gap asb between the partition plates 7°8.9, and overflows from the top C.

An example of the structure of each partition plate 8, 9 is shown in FIGS. 2 and 3.

In the one in Figure 2, each partition plate 8, 9 is controlled by levers io and i1.
This is a structure in which the position of the partition plate 8 can be adjusted from outside the tank, that is, the position of the partition plate 8 can be adjusted using the lever 10, and the position of the partition plate 9 can be adjusted using the lever 11. The structure shown in FIG.

Guide rollers 4, 5 are arranged outside the tank so that the fibers Y1, Y2, Y3 can pass through the gaps a, b of each partition plate 7, 8.9 and the top overflow liquid level C several times. ing.

In the preferred embodiment shown in FIG. 1, the tank has a double structure and the inner tank has the above-mentioned structure, so that the heated liquid that overflows and flows out from the inner tank is stored in the outer tank, and is transferred to the inner tank by the pump P. The supply is circulated through the pump, allowing overflow and outflow to continue.

Therefore, the filament Y1 stretched between the first stretching roller 2 and the second stretching roller 3 passes through the gap a, and the filament Y2 stretched with both rollers 2 and 3 disposed in this way Annealing is performed through the folded guide rollers 4 and 5 and through the gap, and in some cases, the fibers Y3 are
The heat treatment is performed by passing through the uppermost overflow liquid level C.

Since this invention is as described above, it is possible to pass through the same tank by turning around several times without disposing a guide roller in the tank.

[Brief explanation of the drawing]

Figure 1 is a schematic longitudinal sectional view of the drawing heat treatment tank of this invention, Figure 2
Figures 3 and 3 do not show examples of partition plates. .9 is a partition plate, a and b are gaps, C is the top overflow liquid level, and P is a pump.

Claims (1)

[Scope of utility model registration request] In a heat treatment tank in which fibers are passed through a heated liquid in the treatment tank to be stretched and heat treated, the tank walls at both ends of the tank in the direction of fiber passage are arranged in two vertical stages with a horizontal gap. In addition to the above-mentioned partition plate, the heating liquid receives the heated liquid that overflows from the top partition plate and flows out from the partition plates below the top level, and supplies it again into the tank to cause the above-mentioned overflow and outflow. A liquid circulation mechanism and a guide roller mechanism each disposed outside the tank at both ends to guide the filament so as to penetrate the gap and pass through the tank are provided, and the filament is folded back and passed through the tank to be stretched. A stretching heat treatment tank designed to perform heat treatment.