JP2734470B2 - Extrusion press container body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container body of an extrusion press for preheating in a heating furnace integrally with a connector attached to the container body before extruding when exchanging the container body of the extrusion press. is there.

[0002]

2. Description of the Related Art Conventionally, in an extrusion press used for extruding a metal, when a container liner provided on an inner peripheral surface in contact with a billet of a container is worn, the outer diameter of the billet and the inner diameter of the container liner are reduced. Do not match, the size of the billet is changed, or the like, it is necessary to replace the container body (the container liner is built into the container body and integrally formed).

[0003] In order to maintain high productivity after replacing the container body in a short time by replacing the container body, it is necessary to heat the container body to be used for the next extrusion to a predetermined temperature in a heating furnace. there were.

[0004]

However, after assembling the container body heated by the heating furnace into the container holder,
Since the tip of the wiring is screwed and crimped to connect the wiring for energization to the cartridge heater embedded in the container body, the wiring holding nut must be attached each time, and it takes too much time for connection, There is a problem that it is difficult to perform these operations for a long time in a high temperature environment.

SUMMARY OF THE INVENTION An object of the present invention is to provide a container body for an extrusion press, which allows quick replacement of a container body, focusing on the above-mentioned conventional problems.

[0006]

In order to solve such a problem, a container body of an extrusion press according to the present invention comprises:
An electric heater buried on the front and rear sides of the container body, and a heat-resistant male connector for energizing the electric heater, and a power supply mounted on the front and rear sides of the container body on the front and rear sides of the container holder holding the container body. A detachable female connector for energization was attached to the male connector.

[0007]

[Function] A detachable and heat-resistant connector is provided on the container body and the container holder side for supplying electricity to the heater element arranged in the container holder, so that it is used for the next extrusion when the container body is replaced. The scheduled container bodies can be quickly exchanged and heated together in the heating furnace.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of the container body of the extrusion press according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of a container body heater according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is an enlarged view of a portion III in FIG. 1, and FIG. 5 is a plan view of the male and female connectors attached to the container body of FIG. 5, FIG. 5 is a cut-away plan view of the male and female connectors attached to the container body on the extrusion stem side, and FIG. 6 is a cross-sectional view taken along AA of FIG. .

In FIG. 1, reference numeral 1 denotes a cylindrical container body which is detachably mounted in a container holder 2. Heater elements 3 are arranged inside the container holder 2 at equal intervals in the axial direction along the outer periphery of the container body 1. A heat insulating material 4 is interposed between the heater element 3 and the container holder 2.

A container liner 5 is integrally provided on the inner peripheral surface of the container body 1. A billet 6, which is an extruded material, is provided in a cylindrical space in the container liner 5.
Is extruded to the die 8 side by an extrusion stem 7 driven through a cylinder (not shown), and extrusion molding is performed.

In the illustrated example, the opening of the container holder 2 on the die 8 side is smaller than the opening on the extrusion stem 7 side. When the container body 1 is loaded, the step 1a formed near the die-side end of the container body 1 abuts on the container holder 2 to regulate the advance limit thereof.

The container holder 2 of the container body 1
A lock ring groove 9 is formed over the entire periphery in contact with the outer end of the container holder 2 in the vicinity of the end of the die 8 protruding from the end surface, and the lock ring 10 is fitted into the lock ring groove 9. The container body 1 is prevented from retreating.

The lock ring 10 is formed in two halves, and one end of each of the arc pieces 10a and 10b is
Are mounted on a pin 11 attached to the end face of the cover so as to be openable and closable.

In the present embodiment, based on the basic structure described above, preheating to a predetermined temperature can be performed in a heating furnace integrally with the male connector device 14a attached to the container body 1 before the billet 6 is extruded. It has become. When the preheated container body 1 is assembled into the container holder 2 and extruded from the die 8, a connector device 14 (14a, 14b) described later is connected and energized to bring the container body 1 to a predetermined temperature. Temperature control can be performed as described above. Such a connector device 14
, Two sets (a total of four sets) are respectively arranged at upper and lower opposing positions of the front and rear side surfaces of the container body 1 and the container holder 2. The connector device 14 comprises a male connector device 14a attached to the container body 1 and a female connector device 14b attached to the container holder 2.

FIG. 2 shows an example of the male connector device 14a.
As shown in FIG. 2, two heater elements 12 are mounted (eight in total in the left and right or up and down directions) so as to heat the side of the container body 1 on the die 8 side. on the other hand,
A female connector device 14b is provided on the side of the container holder 2 for each of the male connector devices 14a.
4a is provided so as to be able to freely contact and separate from it.

The male connector 14a comprises a rod-shaped male connector 15 and a connecting plate 16 (16a, 16b) connecting the ends of the heater elements 12a, 12b. The female connector 14b comprises a female connector 20a. , A hook 22, a ceramic insulator 24, a slide guide 28, and a lid 32.

First, the male connector 15 and the connecting plate 16 (16a, 16b) of the male connector device 14a are charged at 500 ° C.
It is made of stainless steel having heat resistance so that it can withstand even if it is preheated to a predetermined temperature. On the other hand, the female connector device 14b is mounted on the container holder 2 side, and the container holder 2 itself does not need to be placed in a heating furnace to perform preheating, but the heat release from the container holder 2 Since the surface of the holder 2 is constantly exposed to high temperatures, a heat-resistant material made of, for example, stainless steel is used similarly to the male connector device 14a.

As shown in FIG. 6, a pair of rod-shaped female connectors 20 are provided separately in a ceramic insulator 24, and a spring 26 is elastically mounted between the ceramic insulator 24 and the female connector 20. Female connector 20 fixed so as not to advance / retreat
The male connector 15 which can move forward and backward can be in face-to-face contact. The ceramic insulator 24 is configured to be slidable back and forth between the slide guides 28.

After the female connector 20 and the male connector 15 are in contact with each other, the heater elements 12a and 12b can be energized by hooking a hook 22 from a chain line position to a hook portion 22a indicated by a solid line as shown in FIG. What is going on. The connector devices 14 disposed on the front and rear side surfaces of the container body 1, that is, at the positions of the die 8 and the extrusion stem (shown by chain lines in FIG. 2) are fixed so as not to interfere with other devices constituting the extrusion press device. It is arranged at an angle.

The operation of the container body of the extrusion press configured as described above will be described. First, when it is necessary to replace the container body 1 by, for example, changing the container size, a new container body to be used for the next extrusion is heated to a predetermined temperature in a heating furnace.
On the other hand, as shown in FIG.
Remove from In this case, when the lock state of the lock ring 10 is released, and then the latch 22 is raised from the solid line position shown in FIG. .

From this state, the old container body 1 is taken out of the container holder 2 using a crane or the like. After the taken-out old container body 1, the heated new container body 1 is mounted on the container holder 2. Thereafter, the lock ring 10 is engaged with the lock ring groove 9, and the container main body 1 is prevented from moving in the container holder 2 in the axial direction, is fixed, and becomes a state as shown in FIG. After this,
Enter a series of billet 6 extrusion operations.

[0023]

As is apparent from the above description, the container body of the extrusion press according to the present invention comprises an electric heater embedded in the front and rear sides of the container body, and a heat-resistant male connector for supplying electricity to the electric heater. And a detachable female connector for power supply is attached to the front and rear side surfaces of the container holder holding the container main body, in opposition to the male connector for power supply mounted on the front and rear side surfaces of the container main body. Since the new and old container bodies can be replaced, productivity and workability are greatly improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a container heater according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged view of a portion III in FIG. 1;

FIG. 4 is a plan view of the male and female connectors attached to the container body on the die side.

FIG. 5 is a cut-away plan view of the male and female connectors attached to the container body on the extrusion stem side.

6 is a cross-sectional view as viewed from A to A in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Container holder 3 Heater element 4 Insulation material 5 Container liner 6 Billet 7 Extrusion stem 8 Die 9 Lock ring groove 10 Lock ring 12 (12a, 12b) Heater element 14 Connector device 14a Male connector device 14b Female connector device 15 Male Connector 16 Connecting plate 20 Female connector 22 Hook 22a Hook 24 Ceramic insulator 28 Slide guide

Claims (1)

(57) [Claims] An electric heater buried on the front and rear sides of a container body, and a heat-resistant male connector for energizing the electric heater, and front and rear sides of the container body on front and rear sides of a container holder holding the container body. A container body for an extrusion press, wherein a detachable female connector for current supply is attached to a male connector for current supply attached to a side surface.