JPH0452025A - Rear side equipment of extruder - Google Patents

Abstract

PURPOSE:To prevent the extruder from generating the shape defect caused on the difference of the heights between the extruded material and the rear side table by setting the elevating device for elevating/lowering the rear side table for carrying the extruded material which is extruded from the extruder adjustable in elevating/lowering. CONSTITUTION:The rear side table 2 is made to be elevated or lowered by operating the elevating/lowering device 10, 11 so as to make the height of the rear side table 2 to the suitable position against the lower side of the material to be extruded A. And so, because the material to be extruded A is extruded on this suitable height, the head between the material A to be extruded and the rear side table 2 is made to nothing, and the material to be extruded A extruded from the extruder is carried on the rear side table 2 in the straight state as it is. Therefore, the shape defect of the bent and the twist, etc., which are generated caused on the head at the time of coming into contact with the table side are made nothing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to rear equipment for extruders, particularly to rear equipment with improved rear tables, i.e. initial tables and/or run-out tables.

Conventional technology In extrusion equipment for aluminum materials, etc., generally, in order to support the extruded material that is continuously extruded from the extruder,
An initial table and a rear table of the output table are arranged on the exit side of the extruder. The extruded material passes through the initial table and is further conveyed on the run-out table while being pulled by the puller.

By the way, the extruder can extrude extruded materials of various sizes by replacing dies and the like. However, if the height of the rear table is set high, when an extruded material having a large height dimension is extruded, the lower part of the extruded material interferes with the table surface, causing a problem in extrusion. For this reason, conventionally, the heights of the initial table and the rough-out table have been set according to the dimensions of the maximum height product produced by the extruder.

Problem to be Solved by the Invention However, in this case, conversely, when extruding a product with a low height dimension, the table becomes too low relative to the pass center of the extruded material, and the extruded material or the table surface The difference in head when it comes into contact with the object increases. This causes defects in shape such as bending and twisting, and has the disadvantage that it becomes necessary to strengthen and complicate subsequent tensile straightening.

Moreover, the way the extruded material comes out from the extruder becomes unstable, which is a factor that accelerates shape defects.

This invention was made in view of the above technical background, and it eliminates defects in the shape of the extruded material due to the difference in height between the extruded material and the rear table, and also improves the way the extruded material comes out from the extruder. The aim is to stabilize the

Means for Solving the Problems The above purpose is to improve the extruded material (
This is achieved by the rear equipment of the extruder according to the present invention, which is characterized in that it is provided with lifting devices (10) (11) for raising and lowering the rear transport table (2) of A) in a height-adjustable manner.

Operation: The rear table (2) is raised or lowered by operating the lifting devices (10) and (11) so that the rear table is at the appropriate height or position relative to the lower surface of the extruded material (A). Since the extruded material (A) is extruded at this appropriate height, there is no head difference between the extruded material and the table surface, and the extruded material (A) extruded from the extruder (1) remains straight on the table. (2) Transported above.

EXAMPLE Next, an example will be described in which the present invention is applied to extrusion equipment for aluminum (including its alloys).

In FIG. 2 showing the schematic configuration of the extrusion equipment, (1) is an extruder, (2) is a rear table provided on the exit side of the extruder, and rear table (2) is an initial table (3).
) and a runout table (4). Although not shown, in this embodiment, the table surface of the initial table (3) of the rear table (2) is formed by a free roller, and the table surface of the run-out table (4) is formed by a drive roller synchronized with the extrusion speed. It is formed by rollers. Also, in Figure 2, (5) is a puller (
6) is a cling table, (7) is a stretcher (8)
) is a cutting table, and (9) is a cutter.

As shown in FIG. 1, the initial table (3) and runout table (4) that constitute the rear table (2) are equipped with a lifting device (10) provided on each table.
(11), the table can be raised and lowered, and can be fixed at any desired height, thereby making it possible to freely adjust the height of the table surface. The lifting device (10
) (11) may be of a hydraulic type using a hydraulic cylinder or the like, or may be of an electric type using a motor or the like.

In the extrusion equipment according to the illustrated embodiment, when extruding the extruded material (A) with a small height dimension, the lifting device (10)
(11) to raise the initial table (3) and runout table (4) to a height position where the table surface almost matches the bottom surface of the extruded material (A), as shown by the chain line in Figure 1. After fixing, extrusion is performed. The extruded material (A) that has been continuously extruded from the extruder (1) passes through the initial table (3) and is conveyed on the run-out table (4), but the table surfaces of both tables (3) and (4) exists at an appropriate position with no drop relative to the extruded material (A), so the extruded material (A) is conveyed on both tables in the straight state extruded from the extruder (1).

On the other hand, when extruding an extruded material with a large height dimension, the initial table (3) is
) and the runout table (4) may be lowered as shown by the solid line in FIG.

In this way, even if the height of the extruded material (A) changes, the height of the rear table (2) can be changed accordingly, and the extruded material (A) can be transported in a straight state without bending. can be supported.

The extruded material (A) extruded onto the rear table (2) is transferred to the cooling table (6), cooled while being conveyed through the cooling table, and then transferred to the stretcher (7).
) is subjected to tensile straightening. Since the extruded material (A) is extruded on the rear table (2) in a straight state without any drop, there are few bends, twists, etc., and therefore only slight tensile straightening is required, especially for mandrel pipes and bars. In the case of an extruded material with a simple shape such as, it is also possible to omit tensile straightening.

The extruded material (A) that has undergone the tension straightening process is then conveyed to a cutting table (8) and cut into a predetermined length by a cutter (9).

In addition, in the above embodiment, the initial table (
3) and the run-out table (4) are both provided with lifting devices (10) and (11) so that both tables can be adjusted in height. It may be configured as a fixed type. However, it is preferable to configure both tables so that they can be raised and lowered, since the effects of the present invention can be more reliably and effectively exerted.

Effects of the Invention As described above, this invention is provided with an elevating device that adjustably raises and lowers the rear table of the extruder, that is, the initial table and/or the runout table, so that the height of the extruded material can be changed. According to the height dimension, the height of the rear table can be freely adjusted to an appropriate height without a drop, which is optimal for transporting and supporting the extruded material. Therefore, the extruded material extruded from the extruder can always be conveyed on the table in a straight state, and shapes such as bends and twists that would otherwise occur due to the head when it comes into contact with the table surface can be avoided. It is possible to eliminate defects and improve yield. In addition, the absence of a drop when abutting against the table surface results in stabilization of the way the extruded material comes out from the extruder, making it possible to provide an extruded material with an even more accurate shape. In addition, since bending, twisting, etc. are suppressed, the tensile straightening performed after extrusion can be light or omitted, which has the effect of simplifying the straightening work and improving productivity.

[Brief explanation of drawings]

FIG. 1 is a front view showing the rear table, and FIG. 2 is a plan view showing the schematic configuration of the extrusion equipment. (1)...Extruder, (2)...Rear table, (3
)...Initial table, (4)...Runout table, (10) (l],)...Elevating device, (
A)...Extruded material.

Claims (1)

[Claims] An extrusion device characterized in that a lifting device (10) (11) is provided for raising and lowering a rear table (2) for conveying the extruded material (A) extruded from an extruder (1) in a height-adjustable manner. Rear equipment of the machine.