JPH0791439A - Manufacture of heat roller - Google Patents

Abstract

PURPOSE:To efficiently uniformalize surface temperature in the full length of a heat roller by molding a plurality of pipes axially at same intervals so as to form a cylinder body, then emitting air from respective pipes, and pouring heat conductors thereinto so as to be a heat pipe. CONSTITUTION:A sand mold 12 for an outer mold and a sand mole 13 for a core are made with a wooden mold or a metal mold and a prescribed number of pure copper pipes 11 are stood between the sand molds 12 and 13 at same intervals. The top mold is placed on the bottom mold comprising the sand molds 12, 13, hot aluminum liquid is poured between the sand molds 12, 13, and then a casting of an outer cylinder body 8 embedded with pipes 11' is formed. After finishing it into a prescribed size by mechanical processing, a rather large copper plug is stuffed into one end of the pipes 11', silver wax is put into it so as to seal, and emission of air and pouring of heat conductors such as pure water are performed from/into the other ends of the pipes 11' by a vacuum liquid sealing device so as to be a heat pipe. The pipes are embedded in the main body closely contacted each other so as to eliminate deterioration of the pipes during manufacturing process. Therefore surface temperature of its full length can be uniformalized to be high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat roller used in a heating and drawing process such as a spinning device for directly spinning and drawing synthetic fibers.

[0002]

2. Description of the Related Art The surface temperature of a heat roller must be uniform over the entire length in order to uniformly heat and draw synthetic fibers. Therefore, conventionally, a plurality of holes are made in the tubular body in the axial direction, and a commercially available heat pipe is inserted into the holes. Further, in order to improve its thermal conductivity, a silicon compound or the like is also filled in the gap between the heat pipe and the processed hole.

[0003]

The heat roller filled with the above-mentioned silicon compound has a non-metallic silicon compound between the copper pipe and the heat roller body, so that the heat transfer from the metal to the metal is less than that of the heat transfer from the metal to the metal. The thermal conductivity is poor, and it cannot be said that the intended purpose is sufficiently fulfilled. Also, there is a type in which a copper pipe is inserted into a hole formed in the axial direction of the heat roller and then expanded to form a heat pipe, but it also has insufficient adhesion between the heat roller body and the heat pipe. As with the former, it cannot be said that it has fulfilled its intended purpose.

An object of the present invention is to produce a heat roller which can efficiently make the surface temperature uniform over the entire length.

[0005]

In order to achieve the above object, a method of manufacturing a heat roller according to the present invention forms a cylindrical body by casting a plurality of copper pipes at equal intervals in the axial direction. After that, air is discharged from each pipe and a heat medium is injected to form a heat pipe.

[0006]

In the method of manufacturing the heat roller configured as described above, first, the tubular body is cast with a plurality of copper pipes arranged at equal intervals in the axial direction. afterwards,
By exhausting air from each pipe and injecting a heat medium, those pipes become heat pipes.

[0007]

EXAMPLES The heat roller to which the manufacturing method of the present invention is applied is employed, for example, in the hot got roller 3 of the spinning apparatus shown in FIG. 1 for directly spinning and drawing synthetic fibers.

In the spinning apparatus, a large number of fibers F are spun from the spinning nozzle 1 by an X-truder, and the fibers F are exposed to the laminar cold air blown from the blower 2,
Dozens of them are combined and guided by a pair (the one shown in FIG. 1 is a pair) or a plurality of pairs of Gotet rollers 3 to be stretched, and then wound up into a package 6 by a take-up winder 5 via a yarn guide 4. .
Take-up winder 5 has a winding speed of 3000-3
In the case of 400 m / min, partially drawn yarn (POY) is obtained, and in the case of 6000 m / min or more, drawn yarn (SDY)
Is obtained.

Each of the pair of Gotet rollers 3 has its axis slightly twisted to prevent the yarn Y from interfering with each other. The rotation speed of each gotet roller pair is higher toward the downstream side, and one or both of each pair is heated or unheated. In the case of a heated hot gotte roller, there may be a difference in temperature between the pair. Further, the hot gotette roller needs to have a temperature difference in the axial direction of about ± 1 ° C or less, and when the temperature difference is 4 ° C or more, the physical properties of the yarn are affected.

As shown in FIG. 2, the hot gottet roller 3 has a cylindrical outer cylindrical body 8 fixed to a shaft 7 of a drive motor and a cylindrical inner cylindrical body 9 fixed to an inner peripheral surface thereof. And a magnetic flux generator 10 housed inside the inner tubular body 9.

The outer cylindrical body 8 is a heat roller which is a manufacturing object of the present invention, and heat pipes 11 are embedded at equal intervals in the axial direction. The number is, for example, 1
There are about 40 outer cylinders 8.

The outer cylindrical body 8 is a portion that the yarn directly contacts, and its outer peripheral surface is surface-hardened. Also,
A thin inner cylindrical body 9 made of a magnetic material is closely fixed to the inner peripheral surface. In order to firmly and firmly fix the inner cylindrical body 9 to the outer cylindrical body 8, the inner cylindrical body 9 should be H.264. I. It may be formed by P (hot isostatic pressing) process or by coating with a magnetic material. The inner cylindrical body 9 can generate heat by the alternating magnetic flux generated in the axial direction by the magnetic flux generator 10.

As the outer cylinder body 8 itself, a casting material having a melting point equal to or lower than that of pure copper and having good thermal conductivity, for example, a casting material of brass, phosphor bronze, aluminum or an alloy of aluminum is used. In the structure shown in FIG. 2, the main body 8a is made of aluminum, and the mounting portion 8b of the drive motor on the shaft 7 is made of iron, which has poor thermal conductivity. In this way, overheating of the shaft 7 can be prevented. Reference numeral 8d is a groove for inserting a temperature sensor. In this embodiment, the temperature sensor inserted in the groove 8d detects the temperature of the outer cylinder body 8 and feeds it back to the controller to operate the outer cylinder body. The surface temperature of No. 8 is kept constant.

The magnetic flux generator 10 comprises an iron core 10a and a coil 10b which generate alternating magnetic flux.

The heat pipe 11 is made of pure copper, and a heating medium such as pure water is enclosed in the vacuum space by about 1/3.
The heat medium is heated and evaporated, moves in the heat pipe 11 and gives heat to the low temperature portion to be condensed, thereby functioning to make the surface temperature of the roller uniform.

Next, a method of manufacturing the heat roller will be described with reference to FIGS.

First, a sand mold 12 as an outer frame and a sand mold 13 as a core shown in FIG.
A predetermined number of pipes 11 'made of pure copper are stood between the sand mold 13 and the sand mold 13 at equal intervals. Then, the upper mold is placed on the lower mold composed of the sand mold 12 and the sand mold 13, and aluminum hot water is poured between the sand mold 12 and the sand mold 13 to make a casting of the outer cylinder body 8 in which the pipe 11 'is embedded. At that time, it is preferable that sand is also put in the pipe 11 ′ so as not to be thermally deformed.

Next, after finishing to a prescribed size by machining, the pipe 11 'is made into a heat pipe as follows.

First, a large plug 14 made of copper is packed in one end of the pipe 11 ', and silver wax is further put therein and sealed. Then, from the other end of the pipe 11 ', as shown in FIG.
The air is discharged and a heat medium such as pure water is injected by the vacuum liquid sealing device shown in FIG.

The vacuum liquid sealing device is provided with vertical holes 15a,
A bracket 15 having a fixing bolt 16 and a T-shaped tool 17 screwed into the vertical hole 15a and having a hexagon wrench 17a at the tip, communicates with the vertical hole 15a, and is connected to a vacuum pump via an on-off valve. It also comprises an exhaust hose 18 and a heat medium inflow hose 19 which communicates with the vertical hole 15a and is connected to a heat medium supply source through an on-off valve. In addition,
A plurality of O-rings 20 (only one is shown and the others are omitted) are provided between the bracket 15 and the T-shaped tool 17, and O is also provided around the vertical hole 15 a on the bottom surface of the bracket 15.
A ring 21 is provided.

Prior to discharging the air and injecting the heat medium, a washer 24 having a large-diameter female screw hole 24a and a small-diameter hole 24b formed continuously is press-fitted into the other end of the pipe 11 ', and the female screw hole 2 is formed.
The sphere 22 and the hexagon socket head cap screw 23 are put into 4a.
Then, the fixing bolt 16 is inserted into a predetermined position of the outer cylindrical body 8 to position the vacuum liquid sealing device.

After that, the pipe 1 is drawn from the exhaust hose 18.
The air in 1'is sucked and discharged, and after a predetermined vacuum degree is reached, a predetermined amount of heat medium is supplied from the heat medium inflow hose 19 into the pipe 11 '. Next, the T-shaped tool 17 is rotated to engage the hexagon wrench 17 a with the hexagon socket head bolt 23, and the T-shaped tool 17 is further rotated to mount the hexagon socket head bolt 23 into the female screw hole 24.
The heat pipe is completed by screwing into a, thereby pushing the sphere 22 into the hole 24b, and removing the vacuum liquid sealing device.

[0023]

Since the present invention is configured as described above, it has the following effects.

That is, since the pipe is cast and then made into a heat pipe, the pipe is closely adhered to the main body, and the pipe is not defective in the manufacturing process.
Therefore, the surface temperature can be made highly uniform over the entire length.

[Brief description of drawings]

FIG. 1 is a perspective view of a spinning device.

FIG. 2 is a vertical cross-sectional view of a hot got roller.

FIG. 3 is a perspective view of an outer cylinder body (heat roller) that constitutes a hot got roller.

FIG. 4 is a perspective view of a mold (lower mold) of an outer cylinder (heat roller).

FIG. 5 is a vertical sectional view of a vacuum liquid sealing device.

[Explanation of symbols]

 8 Heat roller body 11 Heat pipe 11 'pipe

Claims (1)

[Claims] 1. A heat roller for forming a tubular body by casting a plurality of pipes in an axial direction at equal intervals, and then exhausting air from each pipe and injecting a heat medium into a heat pipe. Production method.