JPH0311213Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a series of production line systems that mold metal material powder and various other material powders by extrusion processing, and then apply surface treatment to this molding material. Specifically, the present invention relates to an extrusion surface treatment apparatus that performs pressure extrusion molding and surface treatment on the same line.

(Prior Art) Conventionally, as a continuous molding machine for metal material powder, a rotary continuous pressure extrusion device that combines a rotating wheel and a fixed shoe is known. The parts extruded using this equipment may undergo electrochemical treatment on the surface to improve corrosion resistance, wear resistance, etc., or may be coated with wax or different metals for post-treatment. In this case, the pressure extrusion process and the surface treatment process are performed on separate lines. FIG. 3 is a schematic diagram of a conventional pressurized extrusion line, in which a rotary wheel 1 having an annular groove 1a formed on its circumferential surface is combined with a fixed shoe 2 in contact with the circumference of the wheel to form a continuous rotary extrusion line. The extruder is constructed such that the material 5 is fed between the concave groove 1a of the rotating wheel and the stationary shoe 2.
is pressurized as the rotary wheel 1 is pressurized in the direction of the arrow, and is extruded from the extrusion port (die) of the fixed shoe 2, passing through the water washing cooling tank 7 and the looper 21, the formed strip material 6 is wound around the winder 20. taken. When performing surface treatment on a formed strip, the wound formed strip is fed to a surface treatment device while being rewound on another line. As described above, the conventional pressure extrusion line only fulfills the functions of the extrusion molding process, such as an extrusion molding machine, an accompanying cooling tank, and a winding machine.
Furthermore, attempts have been made to process the same lines as shown in Japanese Patent Application Laid-open Nos. 57-177826, 57-180467, and 59-215271.

(Problems to be Solved by the Invention) In the conventional extrusion production system, as described above, extrusion molding and its surface treatment are performed on separate lines, resulting in poor efficiency and high costs.
Furthermore, the same-line processing method shown in the above-mentioned publication does not provide a production system that provides stable surface treatment quality. Particularly in brazing work such as multi-hole pipes, after manufacturing the multi-hole pipe using the rotary continuous extruder, when joining the fins, a brazing agent is applied to the entire surface of the fin side, and the multi-hole pipe is bonded to the multi-hole pipe. The fins are joined. In such a case, if the lines are separate, the appropriate amount of brazing agent cannot be applied smoothly, resulting in a disadvantage that a larger amount than necessary is inevitably used.

The present invention is an extrusion surface treatment method that allows an extrusion processing equipment line and a surface treatment line such as electrochemical treatment to be configured on the same line, thereby increasing the added value and quality of products and improving production efficiency. The purpose is to provide a device.

(Means for Solving the Problems) An extrusion surface treatment device according to the present invention includes a rotary continuous pressure extrusion device equipped with a rotating wheel and a fixed shoe in contact with a part of the wheel; and a surface treatment tank connected to the extrusion port of the device, the surface treatment tank also serving as a cooling tank, and one of the inlet sealed portion and the electrode of the tank is connected to the extrusion die of the rotary continuous pressure extrusion device. This is an electrochemical treatment tank formed by a portion of the

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall schematic diagram of an extrusion surface treatment apparatus according to an embodiment of the present invention. The continuous extruder is a rotary pressure extruder with a rotary wheel 1 and a fixed shoe 2 as described in FIG. A surface treatment tank 8 such as a treatment tank is connected.
This processing tank 8 also serves as a cooling tank using water cooling or the like. In this example, we will explain the general operations of material extrusion processing and electrochemical processing as surface treatment.

First, rotate the rotary wheel 1 of the rotary continuous extrusion processing machine in the direction of the arrow, and
When the material 5 is supplied from the opening side (the side opposite to the extrusion port) to the passage 3 between the rotating wheel 1 and the fixed shoe 2, the material receives a propulsive force due to the contact friction between the rotating wheel 1 and the fixed shoe 2, and moves to the far end of the passage. The material moves through the passage 3 to the front of the shoe protrusion 2b, and the material at the innermost part of the passage is pressurized by the pressure of the subsequent material, and is pushed out through the die 4.

The extruded material is passed through the extrusion port 2a of the fixed shoe 2.
The wafer enters an electrochemical treatment tank 8 connected to the wafer, where it undergoes cooling treatment and electrochemical treatment such as electroplating or anodic oxidation. The electrochemically treated material is introduced into the subsequent washing tank 7, where it is further subjected to passivation treatment, pore sealing treatment, etc. in the post-treatment tank 23 as required, and finally, the product is washed in the tank 24, Degreasing is done. In this way, everything from material extrusion and molding to surface treatment and final product processing is carried out continuously on one line.

FIG. 2 is a detailed sectional view of the connection between the material extrusion port and the treatment tank of the extrusion surface treatment apparatus according to the present invention.
A cooling and electrochemical processing tank 8 is fixed to the extrusion port of the stationary shoe 2 via an insulating seal 25, and the material 6 extruded from the die 4 is configured to be sent out through the processing tank 8. The electrochemical treatment tank 8 is supplied with a circulating treatment liquid that also serves as a cooling agent, as will be described later. First, the molding material 6 extruded by the die 4 of the extruder passes through the extrusion port 2a and passes through the processing tank 8.
undergoes cooling and electrochemical treatment within the chamber. The temperature, composition, etc. of the processing liquid are adjusted in a supply tank 17 and stored in a reservoir 16, and introduced into the processing tank 8 from a nozzle 10 at one end of the processing tank via a pipe 13, a filter 15, and a feed pump 14. The liquid flowing in the processing tank 8 in the direction opposite to the material feeding direction passes through the drain port 27 near the extrusion port of the stationary shoe 2, and is returned to the return pump 28.
through the return piping 26 to the reservoir 16.
will be returned to. Reference numerals 25 and 29 are seals at both ends of the processing tank 8, and the liquid leaking at these seals is collected in the receiving tray 12 at the bottom of the processing tank and returned to the reservoir 16 from the collection pipe 30.

In the illustrated embodiment, the tank wall of the processing tank and the die 4
doubles as an electrode for electrochemical processing. One terminal a of the power supply 18 is connected to the processing tank 8 via an electric wire 31.
The other terminal b is connected to the end plate 11 at one end of the processing tank on the outside of the die 4 and the seal portion 29 via an electric wire 32. Note that the end plate 11 also functions as supporting the extruded material and positioning the center. The connection direction of the contact terminals a and b of the power source 18 varies depending on the type of electrochemical processing. For example, when performing electroplating processing, the connection direction of the contact terminals a and b
is connected to +, terminal b is connected to -, and when performing anodizing treatment, terminal a is connected to - and terminal b is connected to +. The material that has passed through the surface treatment tank 8 is then processed into a subsequent washing tank as explained in FIG.
It is introduced into the post-treatment tank.

(Effects of the invention) As explained above, the present invention can perform surface treatment within the extrusion processing line, which increases the added value of the product compared to the case of conventional extrusion processing only.
Improving production efficiency For example, in the case of multi-hole pipes, it is possible to improve the efficiency of brazing work, and by performing the processing in the same series, space efficiency is also improved. The present invention is useful when applied to the production of composite wires, composite materials, and multi-hole pipes on continuous forming processing lines. In particular, with this invention, in addition to being able to perform electrochemical treatment as a surface treatment on the extruded material within the extrusion processing line, the extrusion die itself is used as one electrode of the treatment tank, so the current application work for electrochemical treatment can be performed without contact failure. It can be carried out under extremely stable conditions, and products with good surface treatment quality can be efficiently produced. The same effect applies even if the cross-sectional shape of the product changes.

[Brief explanation of the drawing]

Figure 1 is an overall schematic diagram of an extrusion surface treatment apparatus according to an embodiment of the present invention, Figure 2 is a detailed sectional view of the connection between the material extrusion port and the treatment tank of the apparatus according to the present invention, and Figure 3 is a conventional continuous FIG. 1 is a schematic diagram of an extrusion processing system. 1...Rotating wheel, 2...Fixed shoe, 2a...Extrusion port, 3...Material passage, 4...Dice, 7...Washing tank,
8... Surface treatment tank, 10... Nozzle, 11... End plate, 1
2... saucer, 13, 26, 30... piping, 16... reservoir, 18... power supply, 25, 29... seal part, 3
1, 32...Electric wire.

Claims (1)

[Scope of utility model registration request] a rotary continuous pressure extrusion device equipped with a rotating wheel and a fixed shoe in contact with a part of the wheel;
a surface treatment tank connected to the extrusion port of the rotary continuous pressure extrusion device, the surface treatment tank also serving as a cooling tank, and one of the inlet sealed part and the electrode of the rotary continuous pressure extrusion device. An extrusion surface treatment device characterized in that it is an electrochemical treatment tank formed by a part of an extrusion die of a pressure extrusion device.