JPS5940526B2 - Method for manufacturing composite striatum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of manufacturing composite filaments using movable wheels.

As shown in FIG. 3, the endless groove 23 and shoe 24 of the wheel 22 attached to the drive shaft 21 cause
A method (so-called conform extrusion method) in which a transport passage is formed to send the material, a receiver 25 for the material 27 and a die 26 for extrusion molding are provided at the back of the transport passage, and the material is extruded from the die. For example, JP-A-47-31859
It is disclosed in Japanese Patent Application Laid-Open No. 49-65369 and is well known.

In this extrusion method, the pressure generation source for extrusion is
This method depends on the contact friction resistance between the material 7 and the endless groove 3, and the extrusion mechanism is completely different from the conventional ram type extrusion method, so there are some problems unique to the one-piece method.

Of particular concern are extrusion pressure fluctuations due to the gap between the wheel and the material and the resulting non-homogeneous product.

In other words, as mentioned above, the pressure generator groove depends on the contact friction resistance between the material and the groove, but the contact acid between the material and the groove during the extrusion operation is not uniform and perfect over the entire contact surface. The reality is that the situation changes in various places and over time, resulting in so-called empty edges.

When moving objects using this type of frictional force, it is inevitable that some degree of instability will occur.

When applying such an extrusion method to the production of composite filaments, it is necessary to further consider the actual situation.

In other words, in order to apply the present extrusion method to the production of a composite filament that strongly requires uniform thickness of the outer layer material, smoothness of the outer surface, homogeneity of interfacial adhesion, and soundness of the internal state, It is necessary to take appropriate solutions for these problems.

The method of using a plurality of movable wheels, which has already been proposed by the inventors, is intended to solve the above problem.

In other words, if there are multiple movable wheels, it is unlikely that all wheels will slip at the same time, and even if one wheel slips, the other wheels will compensate for it, and this will reduce the problem. This is because it is possible to prevent the occurrence of non-defective products.

Based on the above knowledge, the inventors prototyped a composite filament extrusion device using a plurality of wheels and repeated various experiments. As a result, they found that there were still problems that still needed to be solved. found.

One of them is the problem of setup when starting extrusion work.

In other words, when extruding composite filaments, it is necessary to heat the material and process it by so-called hot extrusion in order to reduce the deformation resistance of the material coated as the outer layer material, but in the case of conventional press extrusion equipment The volume of the container and other equipment as a whole is quite large, and heating from the outside is inevitably required.
It has been common practice to use external heating means such as that disclosed in .

However, in extrusion using the movable wheel method, the transportation path is long and narrow and the volume of the entire device is small. It was common to use electrical heating of the material itself, as shown in the previous example.

However, in general, composite filaments, such as aluminum-coated steel wire or copper-coated steel wire, share the mechanical strength with the steel wire serving as the core material, and the coating layer is used as a conductive member or a corrosion-resistant member. In many cases, the products have shared properties, and the material used as the outer layer is often a material with relatively high conductivity, so the efficiency of resistance heating due to 1 volt of electricity is low, and it is extruded hot. This method requires a considerable amount of heating time and has the problem of producing poor quality music.

To explain this in more detail, once a considerable amount of time has elapsed since the start of extrusion and a steady state has been reached, the material itself generates processing heat due to internal friction derived from the deformation resistance of the material during extrusion. This processing heat can be used, but before reaching this steady state, the material is heated by the above-mentioned current heating method, and a part of the heat is used to heat the material and the device itself.
Since the equipment near the heat exchanger is also heated to the temperature required for hot extrusion, a considerable amount of loss time occurs, and during this time a large number of defective products are produced, greatly reducing the yield. .

The present invention has been made in view of the above-mentioned circumstances, and aims to provide a method for manufacturing a composite filament with extremely high efficiency and high yield using a movable wheel. The gist of this method is to prepare a plurality of movable wheels that form a material transportation path with endless grooves provided on the outer circumferential surface and fixed shoe blocks that engage with the grooves, and A material to be the outer layer material to be coated is supplied to each of the transport paths, and the material is forced into the road by the contact friction resistance between the inner surface of the groove of the rotating movable wheel and the material. By feeding the material into the material, an extrusion pressure is generated in the material, and the material under high pressure is collected in a collection chamber at a position communicating with the transportation passage, and the material is continuously transferred from another place into the collection chamber. In a method for manufacturing a composite filament, the core material is supplied, the composite is integrated, and the composite filament is extruded through a die.
A heating device is provided near the gathering chamber and the die to heat the gathering chamber and the vicinity of the die before starting the extrusion operation, and when these reach a predetermined temperature.

There is a method for manufacturing a composite filament in which core wires for extrusion are set and materials are supplied.

By the way, there is a method for manufacturing a composite filament body in which core wires for extrusion are set and raw materials are supplied.

An example of manufacturing an aluminum coated steel wire will be described below based on the accompanying drawings.

In the figure, 1 and 1' are endless grooves 2 on the peripheral end surface, respectively.
, 2', 3, 3' are drive shafts, 4 is a fixed shoe block, 3, 3' are drive shafts, 4 is a fixed shoe block, 5, 5' are wheels l, 1/ and shoes. A transportation passage formed between the block 4, 6, a material made of 6'tl aluminum rod, 7 a die, 8 a collection chamber at the back of the passages 5 and 5', 9 a receiving part of the shoe block 4, 10 is a steel core wire, 11 (1 nipple, 12 is an inner heater, 13 is an extruded composite wire (aluminum coated steel wire), 14 is a shaft, and a stand that holds 3.3').

First, before starting the extrusion operation, a built-in heater 12 placed near the collection chamber 8 and the diamond is used.

These gathering chambers and the vicinity of the die are actively heated.

When these reach a predetermined temperature, the core wire 10
and move the materials 6 and 6' to their respective transportation paths 5 and 5.
' and start extrusion.

In the present invention, since the die and the vicinity of the gathering chamber are actively heated in advance using a built-in heater during extrusion using a movable wheel method, it is possible to reach the required temperature in a short time. It is possible to stabilize the material in a short time and perform hot extrusion in one step, compared to the conventional method of heating the material with electricity.This method has contributed to significantly reducing loss time and improving product yield. Therefore, it is of great significance that it is not only possible to obtain high-quality extruded products, but also to improve the production quality of cloth.

Therefore, by using multiple wheels and arranging them symmetrically as shown in Figure 1, thermal homogenization is possible, and by considering the arrangement of one drive shaft, thermal homogenization can be further achieved. It becomes possible.

Figure 2 shows a plurality of wheels 1, 1' for the purpose of gauging.
Although the drive shaft is arranged perpendicularly to the stand 14, this horizontal alignment of the wheels 1° 1' provides thermal stability.

That is, if the shafts of the wheels are arranged horizontally, the temperature distribution of the stand, frame, etc. that holds the shafts will be uneven, and a temperature difference will occur between the wheels.

This is because if each wheel is placed horizontally on the shaft of the wheel, each wheel is placed one above the other (l), so the upper wheel has a narrower place for heat to escape through the shaft. This is because the lower wheel has a wider area for heat to escape through the shaft.

When such a temperature difference occurs between the wheels, the amount of thermal displacement of the upper and lower wheels is different, and a gap is created in the overall assembly, leading to severe occurrence of cracks.

therefore. As mentioned above, it is desirable to arrange each drive shaft of a plurality of wheels vertically to avoid temperature differences between the wheels.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a continuous extrusion device used in the present invention, FIG. 2 is a front view of the same device, and FIG. 3 is a diagram illustrating the principle of an extrusion device using movable wheels. 1.1'-...Movable wheel, 2, 2'-
...Endless groove, 3, 3'...Drive shaft, 4...Fixed shoe block, 5,5
1...Transportation path, 6, 6'-...Material,
7...Die, 8...Gathering room, 9...
...Bake is part, 10... Core material, 11...
・Nipple, 12...Built-in heater, 13...
...Compound striatum, 14...stand.

Claims (1)

[Claims] 1. Prepare a plurality of movable wheels each of which forms a material transport path with an endless groove provided on the outer circumferential surface and a fixed shoe block that engages with the groove. The desired material is supplied to each of the transport passages, and the material is forced into the passage by the contact frictional resistance between the inner surface of the groove of the rotating movable wheel and the material, thereby extruding it into the material. Pressure is generated, and the materials under high pressure are collected in a collection chamber at a position communicating with the transport passage, and a core material is continuously supplied from another place into the collection room to integrate the materials. In a method for manufacturing a composite filament in which the composite filament is extruded through a die, a heating device is provided near the gathering chamber and the die, and before starting the extrusion operation, the gathering chamber and the vicinity of the die are heated to bring them to a predetermined temperature. A method for manufacturing a composite filament body in which the core wire is set for extrusion and the material is supplied when the filament is reached.