JPS5949087B2 - Continuous molding and extrusion equipment for metal composite pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for continuously extruding gold@composite tubes while integrating materials with different properties such as corrosion resistance and heat insulation on the inner and outer surfaces.

Although various proposals have not been made for this type of metal composite pipe manufacturing apparatus in the past, this invention is based on a generally known metal extrusion molding apparatus that utilizes conform extrudability, and improves it. It is an object of the present invention to provide an apparatus for efficiently and continuously extruding metal composite tubes.

The embodiment will be described below with reference to the drawings. Reference numeral 1 denotes a rotatably supported wheel, and three grooves 2-1 are formed on the outer periphery.
, 2-2, and 2-3 are formed.

3 is a shoe fixed to engage with wheel 1;
A member 5 that covers part of the main body 4 and the grooves 2-1, 2-2, and 2-3 in the longitudinal direction and that fits and slides thereon, members 6 and 7 having die holes, and A member 9 is connected to one main body and has a protrusion 8-1.8-2°8-3 at the lower end that fits and slides into the valley groove, and the member 5°6.7 has a confluence chamber 10.
．． 11, communication path 12-1゜12-2.12-3, 1
2-4, a die hole 13, 14, and a mandrel 15 passing through the die hole.

The groove 2-2 and the merging chamber 10 are communication paths 12-2 and 12-3.
A die hole 13 is provided at the upper end of the merging chamber 10.

Also, the grooves 2-1, 2-3 and the merging chamber 11 are connected to the communication path 12-1.
, communicated with each other by 12-4! -1.The merging chamber 11 is further provided at the upper end.1. It communicates with a product extrusion hole 16 through a die hole 14.

Also, die holes 13 and 14 and a mandrel 15 passing through them.
A predetermined gap is provided between the two.

The structure of the present invention is as described above, and its operation will be explained next.

First, among the grooves formed in the wheel 1, the central groove 2-2
Insert the raw material 17-1 that will become the core material into the grooves 2-1 on both sides.
The raw material 17-2 that will become the covering material is inserted into 2-3, and when the wheel 1 is rotated in the direction of arrow a, each raw material is rotated until it hits the protrusions 8-1, 8-2, and 8-3 due to the contact friction of the valley groove. Move forward.

As the wheel 1 continues to rotate further, each raw material tends to be pushed deeper and deeper due to the contact frictional resistance with the bottom and side surfaces of the groove, generating high pressure.

Due to this pressure, the raw material at the tip becomes a plastic state, and the raw material 17-1 at the center is pushed out from the communication passages 12-2 and 12-3, enters the merging chamber 10, merges with each other, and rotates the mandrel 15 around the shaft. A hollow material 18 is extruded from the die hole 13 as a core.

On the other hand, the raw materials 17-2 on both sides are connected to communication paths 12-1 and 12-4.
The extruded holes 1 are extruded from the die hole 14 as a composite material so as to cover the hollow material 18 which is extruded from the die hole 14 as a core, enters the merging chamber 11, merges with each other, and is extruded from the die hole 13.
Extruded to 6.

In this embodiment, a wheel with three grooves has been described, but the number of grooves may be any number and is not limited to three.

In short, it is sufficient to have a groove for the inner layer material and a groove for the outer layer material.

In addition, in the examples, the inner layer material is a hollow material and the outer layer material is a covering material, but this is a convenient name for easy understanding.On the contrary, the outer layer material is a hollow material and the inner layer is a The same is true even if the covering material is made of a composite material.

As described in detail above, by using the apparatus of the present invention, composite pipes can be efficiently and continuously manufactured from raw materials by cold extrusion, which is extremely effective in practice.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front sectional view, FIG. 2 is a detailed enlarged sectional view of one set along the line Figure 4 is a cross-sectional view along line ■~■ in Figure 2, Figure 5 is a cross-sectional view along line ■~■ in Figure 2, and Figure 5 is a cross-sectional view along line
FIG. 6 is a sectional view taken along the line ``v'' and FIG. 6 is a sectional view taken along the line ``■'' to ``■'' in FIG. 1...Wheel, 2i, 2-2, l-3...
...Groove, 3...Shoe, 8-1, 8-2
, 8-3...Protrusion, 9...Abutment, 10, 11...Merge chamber, 12-1.1
2-2. I2-3.12-4...Communication path, 13
, 14...Die hole, 15...Mandrel.

Claims (1)

[Claims] 1. A wheel that is rotatably supported and has a plurality of grooves on its outer periphery consisting of a groove for inner layer material and a groove for outer layer material, and that engages with the wheel and covers a part of the valley groove in the longitudinal direction. The shoe has a protrusion that fits into the valley groove and slides, and an inner layer material merging chamber and an outer layer material merging chamber are provided inside the shoe, and the merging chamber is connected to the protrusion. The communication passages that open at the front communicate the inner layer material merging chamber with the inner layer groove, and the outer layer material merging chamber with the outer layer groove. 1. A continuous molding and extrusion device for a composite tube, characterized in that it is provided with a mandrel that is penetrated with a predetermined gap.