JPS5947077B2 - Rope heat treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rope heat treatment apparatus, and more specifically,
The present invention relates to a rope heat treatment apparatus characterized in that a pitch voice is used in the part where the rope is introduced into a sealed container in which the rope is heat treated and the part where the rope is led out from the sealed container to prevent steam leakage.

Conventionally, ropes have been heat-treated by so-called dielectric heating, in which a high-frequency electric field is applied after strands are twisted into a rope.

The purpose of heat treatment is to eliminate the repulsive force caused by the twisting inside the rope, prevent it from losing its shape and kinking, increase flexibility, and suppress changes over time.
The principle is that by heating the rope to a temperature slightly below the softening point of the material, the direction of the molecular arrangement is corrected in the direction of twist, and the twisted state becomes the natural state for the rope's molecular arrangement. After doing so, it is cooled and fixed in that state to eliminate the repulsive force.

Note that "kink" refers to the strands that make up the rope being twisted by the repulsive force caused by twisting due to rapid expansion and contraction of the rope.

However, although dielectric heating is highly effective in generating heat for materials such as nylon, which has a relatively large loss coefficient, it generates almost no heat for materials such as polyolefin materials, which have a very small loss coefficient. Therefore, it was not effective.

For this reason, attempts have been made to add water with a very large loss coefficient to polyolefin materials, heat the water by dielectric heating, and use the heated water to heat the rope. It was extremely difficult to increase the pressure between the electrodes above atmospheric pressure.

This is because the part that guides the rope between the electrodes and the part that guides the rope outside between the electrodes after heat treatment must be opened.

Therefore, the water temperature can be raised to over 100℃.
Since the temperature of 0° C. is far below the softening point of polyolefin materials such as polypropylene, almost no effect of heat treatment could be expected.

Furthermore, uniform heat treatment could not be expected due to uneven adhesion of water.

The present invention has been made in view of the above drawbacks of conventional heat treatment devices using dielectric heating, and provides a rope heat treatment device that can perform uniform and effective heat treatment by using steam. It is.

That is, the present invention comprises a sealed container 8 containing steam 9, an introduction pitch voice 51 for introducing the rope 6 into the sealed container 8 which is rotatably attached to the sealed container 8 by a rotary joint 11, and a rotary joint 11. a rope 6 consisting of a lead-out pitch voice 52 for leading out the rope 6 from inside the sealed container 8 which is rotatably attached to the sealed container 8 by a rope 11;
The present invention relates to a heat treatment apparatus.

The present invention will be described below with reference to the drawings.

As described above, the heat treatment of the rope 6 is carried out after the strands 2 are twisted and made into the rope 6, so the heat treatment device according to the present invention may be incorporated in the final stage of the manufacturing process of the rope 6. Further, after the rope 6 is once manufactured, the rope 6 may be set again in the heat treatment apparatus according to the present invention.

When the heat treatment device is incorporated in the final stage of the manufacturing process of the rope 6, it is preferably incorporated between the front capstan roll 7 and the rear capstan roll 7, as shown in FIGS. 1 and 2.

In such a case, the netting of the rope 6 and the heating treatment are performed continuously as follows.

That is, as shown in FIGS. 1, 2, and 3, the strand 2 is drawn from each of the three strand coils 1, each of which has the strand 2 wound around it, which is set in each of the three strand bins 3 of the net making machine. After being guided through the outer periphery of the cylinder 4, each strand 2 is gathered together at the pitch voice 50, and as the cylinder rotates, each strand 2 is twisted into a single rope 6 at the pitch voice 5, and the front capstan roll 7 It is wound up.

At this time, due to the rotation of the cylinder 40, twisting also occurs in the opposite direction, that is, in the direction of the strand coil 1, but this is offset by twisting the strand 2 in the opposite direction to the twisting of the rope 6 in advance.

The rope 6 wound around the front capstan roll 7 is then guided from the introduction pitch voice 51 into the sealed container 8 and subjected to a heat treatment by steam 9.

The pitch voice 5 is a member having a cross-sectional shape as shown in FIG. 4, and the uneven shape of the internal hole corresponds to and matches the uneven shape of the rope 6 to be guided.

Generally, pitch voice 5 is used as shown in FIG. 1 or 2 when twisting strand 2 into rope 6, but in the heat treatment apparatus according to the present invention, pitch voice 5 is used in a sealed container. By using it at the introduction part of the rope 6 into the sealed container 8 and the lead-out part of the rope 6 from the inside of the sealed container 8, leakage of the steam 9 from the sealed container 8 is prevented and the sealing effect is enhanced.

In other words, the outer shape of the rope 6 to be guided and the inner shape of the hole in the pitch voice 5 match, so if the pitch voice 5 is used in the introduction part and the lead-out part to the sealed container 8, the rope 6 and the pitch voice 5 will fit perfectly. The ropes 6 and the pitch voice 5 are in close contact with each other, so that there is hardly any air gap between the rope 6 and the pitch voice 5, so that leakage of the steam 9 from the inlet and outlet parts is almost completely prevented.

However, in this case, in order to advance the rope 6, it is necessary to rotate the pitch voice 5 used in the introduction part and the lead-out part about the center of the rope 6 as a central axis.

This is because the unevenness on the inner wall of the hole in the pitch voice 5 is interlocking with the unevenness on the rope 6.
This is because the progress of the rope 6 is obstructed.

Another method of advancing the rope 6 is to rotate the rope 6 while keeping the pitch voice 5 fixed, but this method has the negative effect of easily disturbing the twist of the rope 6. Not only is there
In fact, it is also very difficult.

This is because, as will be described later, it may be necessary to reciprocate the rope 6 several times within the sealed container 8 using the guide roll 10, so it is extremely difficult to impart rotation to the rope 6. .

50 rotations of pitch point is as shown in Figures 5 and 6.
This is made possible by attaching the pitch voice 5 to the sealed container 8 via the rotary joint 11.

In other words, in the case of FIG.
The rotary joint is gripped by a fixed part 13 of the rotary joint so as to be able to rotate smoothly, and the fixed part 13 of the rotary joint is attached to the sealed container 8.

Therefore, it is possible to rotate the pitch voice 5 as the rope 6 advances.

In addition, on the outer periphery of the rotating part 12 of the rotary joint,
A gear 16 is carved, and the gear 16 meshes with the gear 17 of the shaft 19 that transmits the rotation of the torque motor 18 shown in FIG. 6, so that by rotating the torque motor 18, the rotary joint The rotating part 12 and the pitch voice 5 fitted in the rotating part 12 of the rotary joint can be rotated.

The reason why the torque motor 18 is used here is to synchronize the rotational speed of the pitch voice 50 with the advancing speed of the rope 6 and to prevent excessive force from being applied to the rope 6.

This is because the advancement of the rope 6 and the rotation of the pitch voice 5 are performed by separate motors.
It is necessary to synchronize the 50 rotations of the pitch point with the advancing speed of the rope 6 to avoid applying excessive force, and the torque motor 18 is suitable for this purpose.

That is, the torque motor 18 is a motor whose rotational speed can be controlled by the advancing speed of the rope 6.

In this way, from the introduction pitch voice 51 to the sealed container 8
The rope 6 guided inside is subjected to heat treatment by steam 9 in a sealed container 8, and the time required for the heat treatment is the time required for sufficient heat to be transmitted to the center of the rope 6. , which is determined by the thickness of the rope 6 and the temperature of the steam 9, for example, 1 kg/cri (gauge pressure), 1
When heating a Ronip 6 with a diameter of about 2 cm using saturated steam at 19.61° C., at least about 60 seconds are required.

To achieve this, the speed of the rope 6 should be slowed down, and
It is preferable to extend the time during which the rope 6 is exposed to the steam 9 by reciprocating the rope 6 several times within the sealed container 8 using the guide roll 10, thereby securing the above-mentioned necessary time.

In the case of saturated steam, the temperature of the steam 9 is uniquely determined by determining the pressure; for example, if the pressure is 1 layer, it will be 119.61°C. at an appropriate temperature.

Further, as the steam 9, heated steam that can obtain a high temperature at a relatively low pressure may be used.

The steam 9 is supplied through an air supply pipe 20 connected to the sealed container 8, and the pressure and temperature of the steam 9 inside the sealed container 8 are kept approximately constant, allowing uniform and even heat treatment. becomes.

The rope 6 heat-treated by the steam 9 is then guided out of the heat treatment device from the lead-out pitch voice 52 and wound around the rear capstan roll 7, after which the attached moisture is evaporated by the residual heat of the rope 6 itself. Guided out of the net making machine.

The derived pitch voice 52 also rotates as the rope 6 advances, and the principle and method thereof are the same as those for the introduction pitch voice 51.

Note that the rotational speed of the rear capstan roll 7 is preferably slightly slower than the rotational speed of the front capstan roll 7 if the rope 6 shrinks due to heat treatment.

As described above, the rope 6 that has undergone heat treatment by the heat treatment apparatus according to the present invention is manufactured.

The advantage of the heat treatment apparatus according to the present invention is that it utilizes heating by steam 9, and since the pitch voice 5 is used in the part where the rope 6 is introduced into the sealed container 8 and taken out, the steam 9 can be sealed tightly. Since heating is done almost completely, uniform and even heating can be achieved.

In other words, unlike dielectric heating, steam heating can heat even materials with a small loss coefficient, and steam 9 can easily be heated to a high temperature because it can be set at any temperature by changing the pressure, and therefore is a material with a high softening point. Furthermore, by using the pitch voice 5, the steam 9 is almost completely sealed, making it possible to heat evenly and evenly.

[Brief explanation of the drawing]

Figure 1 is a plan view of a net making machine incorporating a heat treatment device, Figure 2
The figure is a side view of a net making machine incorporating a heat treatment device, Figure 3 is a schematic side view of the cylinder and strand bobbin, Figure 4 is a sectional view of the pitch voice, and Figure 5 is a pitch voice connected to the rotary joint. The assembled sectional view and FIG. 6 are plan views of the heat treatment apparatus. Explanation of symbols in the figure: 1...Strand coil;
2...Strand, 3...Strand bobbin, 4...Cylinder, 5...Pitch voice, 51...Introduction pitch voice, 52
...Derived pitch voice, 6...Rope, 7...Front capstan low/L/,
7...Rear capstan roll, 8...
...Sealed container, 9...Steam, 10...
Guide roll, 11... Rotary joint, 12... Rotating part of the rotary joint,
13... Fixed part of rotary joint, 14
...Gasket, 15...Oil seal, 16...Rotary joint gear, 1
7... Gear of shaft, 18... Torque motor, 19... Shaft, 20...
...Air supply pipe.

Claims (1)

[Claims] 1 A sealed container filled with steam, an introduction pitch voice for introducing a rope into the sealed container rotatably attached to the container by a rotary joint, and a sealed container rotatably attached to the sealed container by a rotary joint. A rope heat treatment device consisting of a lead-out pitch voice and a rope lead-out pitch voice.