JPS598810Y2 - Container for metal extrusion press - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a container for extrusion pressing of metal such as aluminum, and particularly aims to equalize the temperature inside the container during processing.

In a container used for a metal extrusion press, the heating temperature has a great effect on the properties of the extruded material, so it is necessary to make it uniform.

Since it is difficult to equalize the temperature inside the container in the currently practiced heating from the outer circumference of the container tire, various proposals have been made as a countermeasure.

For example, (1) cooling the inner part of the container that tends to be hotter than the rest (see Japanese Patent Publication No. 55-24967), (2) controlling the temperature by using partial auxiliary heaters (Utility Model Publication No. 1973) (Refer to Japanese Patent Publication No. 47-39469), (3) Changing the cross-sectional area inside the container to change the temperature of induction heating, thereby making the temperature inside the container uniform during processing (Japanese Patent Publication No. 47-39469) ) are known.

However, method (1) does not cool the high-temperature part and make effective use of it, which results in wasted heat, and heat uniformity is not always sufficient.

Method (2) has problems in that heat conduction efficiency is poor and temperature control of each of the main heater and auxiliary heater is complicated.

Furthermore, it cannot be said that the method (3) necessarily adequately responds to temperature changes inside the container that vary depending on the extrusion processing conditions.

The present invention was made to solve these conventional problems.It is a container for metal extrusion presses, which is characterized by having a plurality of heat pipes embedded in the container at positions close to the liner inside the container. be.

To explain the embodiment using drawings, FIG. 1 shows a sectional view taken along line A-A in FIG. 2, and FIG. 2 shows a side view.
In the figure, 1 is a container tire, and 2 is a container liner.

A plurality of (eight in the figure) heat pipes 3 are embedded in the container tire 1 at positions close to the container liner 2.

A heat pipe is a device in which a working liquid is placed in a pipe, and heat is transferred using a system that evaporates the working liquid, moves vapor within the pipe, and releases latent heat by condensing the vapor. By focusing on the function of such a heat pipe and embedding it inside a container, the high temperature generated inside the container during processing is immediately moved to the low temperature side, and the temperature inside the container is always kept uniform.

According to this method, unlike the conventional method of partially cooling or heating, sufficient temperature uniformity can be achieved, so that an extruded metal material with stable properties can always be obtained.

For aluminum extrusion, the heating temperature of the container is 4
00 to 500' C, mercury, for example, is most suitable as the working liquid in the heat pipe.

Although eight heat pipes 3 are used in FIGS. 1 and 2, they are arranged at equal intervals so that heat is transferred uniformly to each part.

The number of heat pipes 3 is not limited to eight, and can be increased or decreased depending on the situation.

Further, as shown in FIG. 3, the heat pipe 3 is not an integral piece, but may be composed of two pieces extending in the longitudinal direction with their tips abutted against each other.

Further, as shown in FIG. 4, short heat pipes 4 may be provided at appropriate positions between the heat pipes 3 so as to be close to (or connected to) the heat pipes 3.

By doing so, it is possible to eliminate the non-uniformity of temperature that occurs to some extent in the circumferential direction, and it is possible to achieve further uniformity of temperature.

The present invention is as described above, and has an extremely simple structure that makes it possible to equalize the temperature of the container and is also effective in terms of effective use of heat.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, and Figure 1 is A of Figure 2.
-A sectional view, FIG. 2 is an end view, FIG. 3 is a partial sectional view of a modified example, and FIG. 4 is a partial end view of another modified example. 1... Container tire, 2... Container liner 3, 4... Heat pipe.

Claims (1)

[Scope of utility model registration request] A container for metal extrusion press, characterized in that a plurality of heat pipes are embedded in a position close to a liner inside the container.