JPS6039443B2 - Extrusion traction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extrudate pulling device for gripping an extrudate coming out of a die of an extruder and pulling it out by applying tension in the extrusion direction.

It is widely known to provide an extrudate traction device to apply a predetermined tension to the extrudate in order to prevent the extrudate from twisting or the like when extruding aluminum or similar metals from an extruder.

This extruded product pulling device mainly consists of a carriage that moves on a rail provided along a runout table and a gripper that grips the end of the extruded product. Recently, it has been considered to use a linear motor as a drive source for this carriage for the following reasons. In other words, by using a linear motor, the overall structure of the equipment is extremely simple, maintenance is easy, the return speed is high, and fully automated unmanned operation is possible, saving labor. At times, uniform and constant tension is applied to the entire extruded product, so twisting and the like do not occur and product quality is extremely improved. As an extruded product pulling device using such a near motor, for example,
There is one described in Japanese Patent No. 130105. The device disclosed in this publication has its own characteristics by arranging rails that serve both the purpose of supporting the carriage and the secondary plate of the IJ near motor in the following four ways. [A] A rail placed horizontally on one side of the laso out table. According to such an arrangement, the arrangement and maintenance of the rails on the secondary side are easy, and the design of the carriage is also easy.

(0) The rail is arranged on one side of the runout table so as to be inclined outward. According to this arrangement, 2
Since the next rail is inclined, it is easy to balance the weight of the left and right sides of the carriage, and there is no need to attach extra ballast to the carriage, so the carriage itself can be designed to be light in weight, and it can be placed in the air on the rail. Floating dust accumulates, creating a thickening effect.

A device in which the cage is placed below the run-out table and parallel to the run-out table.

This arrangement has the effect that the weight balance of the carriage is good and that the entire apparatus is compact in the width direction. '2} The rail is placed above the runout table and parallel to the runout table. With this arrangement, only downward gravity acts on the carriage, so no undue force is applied to the carriage, improving the durability of the carriage, and at the same time, there is no air pressure on the rail. Since floating dust does not accumulate, maintenance of the entire device is easy and there are fewer failures. As described above, each of the extruded product pulling devices disclosed in Samurai Publication No. 53-30105 has its own characteristics, but it cannot necessarily be said that they are practically sufficient in the following respects. In other words, when driving a carriage using a linear motor, a cooling fan may be attached to the back of the linear motor to cool the linear motor and the secondary rail. When the rails are arranged as in 2), the flow of cooling air between the linear motor and the rail is poor, and a sufficient heat dissipation effect cannot be obtained.

Furthermore, even when the rails are arranged in a straight line, the runout table and near motor are placed close to each other due to space limitations, so the table installed above blocks the flow of cooling air and ensures sufficient heat dissipation. No effect is obtained. In addition, if the structure is as shown in item (a) above, the weight balance between the left and right sides of the carriage is not good,
The disadvantage is that the carriage requires ballast and that airborne dust accumulates on the rails. According to the configuration shown in 'Low', since the carriage is configured diagonally, the area occupied by the skirt becomes large and the manufacture of the carriage becomes difficult.Furthermore, it is necessary to adjust the installation of the rail on site depending on the diagonal configuration of the carriage. This makes on-site work complicated. Furthermore, the weight balance between the left and right sides of the carriage is better compared to the configuration shown in 'A'.
Still, there is a drawback that sufficient left-right balance cannot be obtained when the gripper is attached. According to the configuration shown in Section 1, there is a branch office of the runout table, so
There is a drawback that sufficient installation space for the rail cannot be obtained. For this reason, the distance between the center line of the gripper head provided on the carriage and the center line of the rail to which the carriage is attached becomes short, and the center of gravity of the carriage ends up outside the rail. The configuration shown in item (○) has the disadvantage that the construction of the support for arranging the rail above the runout table is costly. As described above, the conventional extruded article pulling device using a linear motor as the drive source for the carriage has various practical problems. In view of the above, it is an object of the present invention to provide an extrudate pulling device having the following features so as to be optimal for practical use.

{1- Good heat dissipation effect.

■ The area occupied by the hem is small.

{3} Good weight balance.

■ Dust should not easily adhere to the secondary plate of the linear motor.

{5) The carriage should be easy to manufacture.

(6) It is easy to damage and adjust the rail.According to the present invention, the purpose of this is to attach the secondary plate, which is the secondary side of the linear motor, to the outside vertical surface of the rail installed on one side of the runout table. This is achieved by vertically incorporating a linear motor into the carriage so as to face the secondary plate.The present invention will be described in detail below based on an embodiment shown in the drawings.

FIG. 1 is a front view of an extruded product pulling device according to the present invention, and FIG. 2 is a sectional view taken along the line A-A.

In the figure, 1 is the seal, 2 is the secondary plate, 3 is the support,
4 is a carriage, 5 is a linear motor, 6 is a cooling fan,
7 is the wheel, 8 is the box, 9 is the claw, 10 is the spring,
11 is a shaft, 12 is a gear, 13 is a shaft, 14 is a control panel, 1
5 is a current collecting brush, 16 is a trolley, and 17 is a runout table. Rail 1 is runout table 1
A secondary plate made of an aluminum plate is installed parallel to one side of the rail 1 and facing the linear motor 5 on the outer vertical surface of the rail 1. Therefore, the linear motor 5 is mounted on the carriage 4 vertically. The carriage 4 is attached to the rail by wheels 7, and with this configuration, a part of the gripper consisting of a box 8, claws 9, etc., an IJ near motor 5, a control panel 14, and a rail relative to the rail are connected to each other by wheels 7. Due to the positional relationship, a very good weight balance can be obtained. A cooling fan 6 is provided on the back side of the linear motor 5 to cool the linear motor 5 and the secondary plate 2. Further, since the secondary plate 2 is installed on the outer vertical surface of the shield, it is difficult for dust to accumulate thereon. The linear motor 5 and part of the gripper are supplied with power from the trolley 16 via the current collecting brush 15, and this power supply is controlled by a control circuit provided in the control panel 14. This control circuit receives a command from a remote control station (not shown), for example, wirelessly, and performs the above-mentioned power supply control based on this command. Part of the gripper includes box 8, claw 9, spring 10, and shaft 11
, 13, and gear 12. Although not shown, a plurality of claws 9 are provided so as to be able to rotate independently of each other around a shaft 13, and the box 8 is symmetrically mounted by a gear 12 around a rattan 11 as shown in FIG. It is constructed so that it can be connected and opened. In the gripper configured in this way, the box 8 is initially closed,
The claw 9 is in a drawn state, and the carriage 4 is driven by the linear motor 5 and moves to the end (not shown) of the extruded product on the right side of FIG. 1, and the claw 9 is lowered and removed. 9 and box 8 grip the ends of the extrusion. In this state, the carriage 4 is thrust to the left in FIG. 1 by the linear motor 5, thereby applying a predetermined tension to the extruded product and pulling it. When the extruded product is extruded to a predetermined length, the power supply to the IJ near motor 5 is cut off, the carriage 4 is stopped, the box 8 is opened, and the extruded product is released from the gripper for removal. The carriage 4 is then returned to the extruder side for the next extrusion process. The configuration and operation of the extruded product pulling device according to the present invention are as described above, and with such a configuration, the following effects can be achieved.

First, regarding the heat dissipation effect, the cooling fan 6 is used when the linear motor 5 is installed vertically as shown in FIG. 3a, and when the linear motor 5 is installed obliquely as shown in FIG. 3b.
Comparing the flow of cooling air (indicated by arrows in the figure), the cooling air flows upward better in the case shown in Figure 3a, so the heat dissipation effect is better.

Furthermore, if the linear motor is installed horizontally, almost no cooling air will flow. The same thing as shown in the figure is shown. Next, regarding the area occupied by the installation, if we compare the device according to the present invention shown in Figure 4a with the device shown in Figure 4b which incorporates a linear motor in a tilted manner, we will see that the IJ near motor is installed vertically. By incorporating it, the installation area can be reduced by Q.

Also, considering the weight balance, in the case of Figure 4 a and b, each zero weight position is at the location indicated by G,
The device according to the present invention in which the linear motor is mounted vertically has a better weight balance because the center of gravity is located on the rail. In addition, in the device according to the present invention, since the secondary plate is vertical, it is difficult for dust to stick to it, and the part where the linear motor or control panel is installed and the part where the gripper is installed need only be at right angles. This makes it easy to manufacture the carriage, and furthermore, when attaching and adjusting the hem of the rail, there is no need to worry about the mounting angle of the support and rail, so the work can be done easily.

In this way, the extruded product pulling device according to the present invention was developed by the Japanese Patent Publication No. 53
It has many features not found in the conventional extruded product pulling device disclosed in Japanese Patent Publication No. 30105, and is an extremely excellent device for practical use.

[Brief explanation of the drawing]

1 and 2 are front views of the extruded product pulling device according to the present invention, and FIGS. 3 and 4 are explanatory diagrams for explaining the effects of the device according to the present invention. 1...Rail, 2...Secondary plate, 3...Strut, 4...
...Carriage, 5...Linear motor, 6...Cooling fan, 7...Wheel, 8...Box,
9...Claw, 10...Spring, 11, 13...Shaft, 1
2... Gear, 14... Control panel, 15...
... Current collection brush, 16 ... Trolley, 17.
...Run out table full. Figure 0 Figure 2 Figure 4 Figure 4

Claims (1)

[Claims] 1. An extruded product pulling device that applies tension to an extruded product and pulls it out in the extrusion direction by moving a carriage provided with a gripper that grips the end of the extruded product coming out of an extruder die in the extrusion direction, in which the carriage is freely movable. A rail to be attached to is extended parallel to the run-out table on one side of the run-out table that holds the extruded product on the top surface, and a secondary plate that becomes the secondary side of the linear motor is installed on the outside vertical surface of the rail. The carriage is mounted on the rail so that the center of gravity is located on the rail, a linear motor is built into the carriage so as to face the secondary plate as a source of disturbance, and a cooling motor is installed on the back side of the linear motor of the carriage. An extruded product traction device characterized by having a fan attached.