JPH0783894B2 - Extrusion processing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion processing apparatus, and more particularly to an extrusion processing apparatus for metal such as aluminum material.

[0002]

2. Description of the Related Art An extrusion processing apparatus for an aluminum material or the like is equipped with an extrusion tool (1) for determining the shape of an extruded product at the tip of a container (2) as shown in FIG. ) Is held by a die slide (5) fixed to the end platen (8) side. The extrusion tool (1) generally includes a die (3) having a die hole (3a), a backer (4) adjacent to the front side thereof, a die ring (6) accommodating them, and a backer (4). It includes a bolster (7) arranged on the front side and is configured by a combination thereof. And
By preheating and pressurizing the billet (B) loaded in the container (2), the extruded material is extruded from the die hole (3a) of the die (3), so that the product mold material (S) having a predetermined cross-sectional shape is formed forward. Is supposed to get.

By the way, in the extrusion processing of the aluminum material as described above, the most important thing in that case is to obtain the extruded material with as good a size and shape accuracy as possible. For this reason, conventionally, the die (3) is preliminarily preheated to about 400 ° C. in a die oven before being used for extrusion to make each part a uniform temperature before use. This preheating is carried out by heating the whole enjoyed a normal die (3) a backer (4) die ring (6) of the holding tool with the like,
After this preheating, the die slide (5) is incorporated and supported, and is moved to the extrusion position to start extrusion processing.

[0004]

However, no matter how much preheating of the extrusion tool (1) including the die (3) is carried out, particularly when it is intended to manufacture a precision extrusion material having a complicated shape, In particular, as the number of extrusions increases, the shape of the metal flow from the die may become irregular, the thickness may be irregular, the product may be twisted, and the yield may be reduced.

The reason for this is that the die (3) is aged.
To reduce extrusion stability due to temperature non-uniformity due to thermal radiation
The thing itself has long been recognized. 6] And to solve it, dice (3), backer
Press including (4), die ring (6) and bolster (7)
Heat insulation by enclosing the tool (1) from the outer peripheral side with heat insulating material
To such or in (Japanese Utility Model 5 8 - 28722 JP ginseng
Or the die (3) covers the outer circumference.
In some cases, it may be possible to provide heat insulating material
Was there.

However, the heat insulating material is provided on the outer peripheral side of the extrusion tool (1).
In the structure surrounded by, the extrusion tool (1) is die-slide
The heat insulating material is die slide while it is held in (5).
The die slide will come into direct contact with (5).
For repeated installation and removal of the extrusion tool (1) to (5)
Causes the heat insulating material to wear out and wear over time
There is a problem that the life of the material is shortened.

Further , the die (3) covers the outer peripheral portion thereof.
In the structure in which the heat insulating material is installed, the dice (3)
Repeated replacement also causes wear and wear on the insulation.
Not only shortens its life, but also dice (3)
It is, of press design to try to extrusion type and die life, etc.
There are many types, and many are prepared according to
The task of installing heat insulation material in each of them is very troublesome
become.

Further, any of the above structures has an extrusion tool.
(1) or die (3) with heat insulating material on the outer periphery
Therefore, set the extrusion tool (1) on the die slide (5).
The die (3) in the die ring (6)
These extrusion tools (1) such as setting
And the handling of dies (3) would be a hassle
There is also a problem.

The present invention addresses the above-mentioned conventional problems.
In view of this, it is possible to extend the life of the heat insulating material and
The work of mounting the heat material can be greatly reduced,
By the way, the setting work of the extrusion tool or its components
As with the case where no heat insulating material is provided
To provide an extrusion device that can be performed without inconvenience.
With the goal.

[0011]

For the above-mentioned purpose,
The invention is directed to a die ring (6) in an extrusion tool (1).
Embedded in the middle part of the thickness in the radial direction.
It is characterized in that it is provided with a heat insulating material layer (20).
The subject is an extrusion processing device.

[0012]

In the extrusion processing apparatus according to the present invention, the installation of the heat insulating material layer suppresses the heat of the die from being transmitted to the outside through the peripheral members. Therefore, the heat of the die is prevented from being dissipated, the temperature of the die is prevented from being partially lowered, and the temperature is kept uniform throughout the extrusion process.

[0013]

EXAMPLE In the example shown in FIG . 1 , (1) is an extrusion tool, (2) is a container, (3) is a die, (4) is a backer, (5) is a die slide, and (6) is a die. ring,
(7) shows a bolster and (8) shows an end platen, respectively.

The embodiment shown in FIG. 1 has a die ring (6).
A slit-shaped annular groove (13) is formed from the front surface side at an intermediate portion in the thickness direction of the radial line of the above , and a heat insulating material layer (20) is provided in a filled and embedded state . This structure
The structure is suitable because it can protect the heat insulating material layer (20) and increase its life.

In the above embodiment, the temperature of the die (3) can be prevented from escaping to the outside through the die ring (6), and the die (3) can be prevented from being cooled from the outer peripheral surface side.

Needless to say, the heat insulating layer (20) should be made of a heat resistant heat insulating material such as glass wool or asbestos.

[0017]

As described above, the present invention is applicable to extrusion tools.
The thickness of the radial thickness of the die ring
With a heat insulating material layer embedded in the middle part
Therefore, the radiation from the outer peripheral surface side which is the heat radiation path of the die is
Prevents temperature drop due to heat and makes dies throughout extrusion
It is possible to suppress a partial decrease in temperature.
In particular, the heat insulating material is the thickness of the wall thickness in the radial direction of the die ring.
Since it is provided in the middle part of the direction,
Insulation is performed at a position close to the
It can be restrained. Therefore, even when the extrusion process is continued for a long period of time, various adverse effects caused by the temperature change of the die are avoided, and the occurrence of defective extrusion, defective shape, inaccuracy, etc. of the extruded material is prevented. As a result, it is possible to manufacture a uniform and highly accurate extruded material.

Moreover, the heat insulating material layer is used for the extrusion tool.
Filling in the middle of the thickness of the illing radial direction
Since it is installed in a form that inserts dies and backers
Insert into and remove from the ring, or die
Hold the die ring with a backer inserted in the die slide
When and retrieving is, contact with the external touch the insulation material
Thermal insulation without causing damage or wear due to
It can be fully protected and its life can be extended.
Wear.

In addition, the duct provided with the heat insulating material is
The illing is used without changing even when changing dies.
It is a versatile extrusion tool component that is often used.
And the number is limited compared to dice,
Insulation with embedded insulation for a limited number of die rings
Since it is sufficient to install it, the work of installing the heat insulating material is greatly reduced.
Can be reduced.

Further, as described above, the heat insulating material is used for the die ring.
Since it is installed in the embedded type,
For handling, use in the case of die ring where the heat insulation layer is not provided.
As usual, you can do it as usual without any problems.
Wear.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an extrusion processing apparatus of the present invention .

[Explanation of symbols]

 1 ... Extrusion Tool 2 ... Container 3 ... Die 6 ... Die Ring 20 ... Heat Insulation Layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Haruo Arima, 6-224, Kaiyama-cho, Sakai City, Osaka Prefecture Showa Al Minium Co., Ltd. (72) Futao Kitayama, 4-224, Kaiyama-cho, Sakai City, Osaka Prefecture, Showa Al Minium Co., Ltd. (72) Inventor Mitsuhiro Kitano 6224, Kaiyamacho, Sakai City, Osaka Prefecture Showa Alminium Co., Ltd. (72) Inventor Masami Sudo, 6224, Kaiyamacho, Sakai City, Osaka Prefecture Showa Alminium Co., Ltd. (56) References JP-A-61-259832 (JP, A)

Claims (1)

[Claims] 1. A die ring in an extrusion tool (1)
In contrast to (6), the thickness in the radial direction is the middle of the thickness direction.
Insulation layer (20) is provided so as to be embedded in the part.
And an extrusion processing device.