JPS58107243A - Manufacture of composite wire - Google Patents

Abstract

PURPOSE:To facilitate extrusion at the time of starting by heating tools constituting the surroundings of an extruding chamber by passing steam when starting the extrusion. CONSTITUTION:When starting extrusion or when restarting after stopping, extrusion is not performed smoothly as the temperature of covering metal of the extruding chamber 11 is low and extruding tools are also cooled down. Accordingly, extruding tools are heated by allowing steam of temperature below maximum working temperature allowed by the quality of tools flowing to communicating holes 16, 17, 18, and the temperature of the covering metal 3 of the extruding chamber 11 is made suitable for extrusion. When a stationary state is attained after starting extrusion, the covering metal 3 is heated by heat of friction, and supply of steam is stopped. When extruding tools become high temperature due to heat generation of the covering metal 3 in the stationary state, they are cooled by passing cooling water through communicating holes 16, 17, 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a metal core material made of, for example, iron, steel, iron alloy, nickel, nickel alloy, copper, copper alloy, etc., and an outer material made of aluminum, copper, zinc, or an alloy thereof. The present invention relates to a method of manufacturing a composite wire coated with a metallized material.

In recent years, various methods have been proposed for manufacturing composite wire using a friction-driven extrusion device (referred to as a conform device), as proposed in, for example, JP-A-47-31859. No. 144328).

As an example of this method is shown in FIG. The supply pipe line 8 formed by the above is used as a pressurized container for the outer sheath metal 3, and the outer sheath metal 3 and the core material I inserted through the core material insertion hole 9 provided in the fixed sea block 6. is pipe 8
The composite wire 2 meets and is crimped in an extrusion chamber 11 that communicates with the rear end 10 and is crimped by an extrusion die 12 provided in the extrusion chamber 11.
It is extruded as

In this case, the extrusion force of the sheath metal 8 is mainly obtained by the contact friction resistance between the sheath metal 3 and the surface of the groove 5 of the drive wheel 4, and the force between the sheath metal 3 and the inner wall surface 7 of the fixed shoe block 6. As the outer sheath metal 3 is heated by frictional heat generation, the deformation resistance of the outer sheath metal 3 is reduced and extrusion becomes possible.

In extrusion of composite wire, the extrusion chamber 11 is where the sheath metal 3 and the core material 1 meet. The hollow mandrel 13 and the core 1 which insert the core 1 into the extrusion chamber 11 tend to lower the temperature of the sheath metal 3. In particular, at the start of 1° extrusion and at the time of restarting after stopping, the temperature of the sheath metal 8 decreases significantly, so that extrusion may become impossible.

For this reason, conventional methods have been used to raise the temperature of the outer sheath metal in the extrusion chamber by embedding a resistance heating element around the extrusion chamber 11 or heating the core material and/or the outer sheath metal with electricity. In both cases, the equipment was complicated and temperature control was complicated.

The present invention has been made to solve the above-mentioned problems, and by heating the tools surrounding the extrusion chamber through steam at the start of extrusion, the temperature of the outer sheath metal inside the extrusion chamber is raised, and Alternatively, it is an object of the present invention to provide a method for facilitating extrusion when restarting after stopping.

The present invention provides a groove surface of a drive wheel having a groove on the outer circumferential surface;
Friction-driven extrusion in which a core material insertion hole and an extrusion die are provided near the rear end of the supply conduit of the outer sheath metal formed by a part of the outer circumference of the wheel and the inner wall surface of the fixed sea block engaged with the wheel. In a method of extruding a composite wire using a device (conform device), the sheath metal leaves the groove of the wheel and communicates with the inside of a tool that constitutes a path for moving to the extrusion die, or the inside of a member that encloses the tool. A hole is provided, and at the start of extrusion, steam is passed through the communication hole, and in a steady state after the start of extrusion, the supply of the steam is stopped, or cooling water is passed instead of the steam. This is a characteristic extrusion method for composite wires.

Hereinafter, the present invention will be explained by examples using the drawings. FIG. 2 is a longitudinal sectional view showing an example of a friction-driven extrusion device used in an embodiment of the method of the present invention. In the figure, the same reference numerals as in FIG. 1 indicate the same parts.

The conform device used in the present invention is the same as that shown in FIG. 1 except for the portion shown in FIG. In FIG. 2, the extrusion chamber component 15 forms an extrusion chamber 11. As shown in FIG. A hollow mandrel 13 and an extrusion die 12 are incorporated into the extrusion chamber component 15.

A fixed sea block 6 is provided inside the extrusion chamber component 15.
Communication holes 16 and 1 pass through it from the outside and go out to the outside.
7 is provided. This communication hole is not limited to the one shown in the figure.
tools (for example, the extrusion chamber component 15, the hollow mandrel 13
, extrusion die 12, etc. (hereinafter referred to as extrusion tool).

Further, as a communication hole, a communication hole 18 as shown in the figure may be provided inside a member (fixing shoe block, etc.) surrounding the extrusion tool.

The number of these communication holes may be one or more, and the appropriate location, structure, number, etc. may be selected depending on the conditions.

When starting extrusion or restarting after stopping, the temperature of the outer sheath metal in the extrusion chamber 11 is low and the extrusion tool is also cold, so in the present invention, the temperature is lower than the maximum operating temperature allowed for the tool material. (For example, approximately 500°C for extruded outer jacket Al)
of water vapor is allowed to flow into the communicating holes 16, 17 and/or 18 to heat the extrusion tool, thereby heating the jacket metal 3 in the extrusion chamber 11 to a temperature suitable for extrusion,
Extrusion at the start becomes easier.

When the steady state is reached after the start of extrusion, the sheath metal 3 is heated by frictional heat generation as described above, and there is no need to heat it with the extrusion tool, so the supply of steam is stopped.

In addition, in a steady state, each extrusion tool
In the case where there is a risk of damage due to the high temperature due to heat generation and a decrease in its strength, the present invention switches the pulp in the piping from steam to water and passes cooling water through the communication hole to maintain the temperature of the extrusion tool at a safe level. It can also be held at temperature.

In the present invention, the direction of extrusion is the direction of the cutting line of the drive wheel 4 in the drawings, but extrusion may also be carried out in other directions, for example, in a direction perpendicular to the cutting line (direction parallel to the axial direction of the drive wheel 4). good.

As described above, the present invention provides a method for extruding a composite wire using a friction-driven extrusion device (conform device).
A communication hole is provided inside the tool (extrusion tool) that constitutes the path through which the sheath metal leaves the groove of the wheel and moves to the extrusion die marked -F, or inside the member that encloses the tool, and at the start of extrusion. In order to pass water vapor through the communication hole, the extrusion tool is heated, which heats the outer metal in the extrusion chamber to a temperature suitable for extrusion. This has the effect of making it easier for example, without any problems.

In addition, in a steady state after the start of extrusion, the supply of water vapor is stopped or cooling water is passed instead of the water vapor, which prevents the extrusion tool from overheating due to the high-temperature outer metal and maintains a safe temperature. Therefore, there are advantages in that the extrusion tool is not damaged and has a long life, and that the extrusion temperature can be kept constant to achieve a stable extrusion speed and a uniform outer metal coverage.

In addition, the method of the present invention requires only the installation of the above-mentioned communication holes, and the operation requires only switching between steam and cooling water.
It has the advantage that the equipment is simple and the work is simple and easy.

FIG.

FIG. 2 is a longitudinal sectional view showing an example of a friction-driven extrusion device used in an embodiment of the method of the present invention.

1...Core material, 2...Composite wire, 3...Sheath metal, 4...
Drive wheel, 5... Groove, 6... Fixed shoe block.

7.Inner wall portion, 8. Supply pipe line, 9. Core material insertion hole.

10... Rear end, I+... Extrusion chamber, 12... Extrusion die.

13...Hollow mandrel.

15...Extrusion chamber constituent member, +6.17.18.Communication hole.

Agent Patent Attorney Hidetomi Aoki 9-

Claims (1)

[Claims] +1+ A core material is placed near the rear end of the supply conduit of the sheath metal formed by the groove surface of the drive wheel having a groove on the outer circumference and the inner wall surface of the fixed shoe block engaged with a part of the outer circumference of the wheel. In a method of extruding a composite wire using a friction-driven extrusion device provided with an insertion hole and an extrusion die, the inside of the tool or the tool that constitutes a path through which the sheath metal leaves the groove of the wheel and moves to the extrusion die. A communication hole is provided inside the member that envelops the water vapor, and at the start of extrusion, water vapor is passed through the communication hole, and in a steady state after the start of extrusion, the supply of the water vapor is stopped, or cooling is used instead of the water vapor. A method for manufacturing a composite wire characterized by its ability to pass water.