DE102005028086B4 - Device for supporting a plastic profile - Google Patents

Abstract

Device for supporting a plastic profile, in particular for a plastic pipe, in a calibration and / or cooling device (1), which has a support area in which it supports the plastic profile (2), characterized in that the support device is arranged in a row by a plurality of successively arranged ones pivotable disks (4, 5, 6) with different support contours is formed, the disks (4, 5, 6) forming spaced and parallel planes in the set-up state.

Description

The invention relates to a device for supporting a plastic profile, in particular for a plastic pipe, in a calibration and / or cooling device having a support region in which it supports the plastic profile.

In extrusion lines in use today, when changing from one dimension to the other, in addition to the calibration device, the support disks located in the vacuum tank, for example, are exchanged and replaced by disks with a different radius. This in turn means that for each product to be produced appropriately matched support discs must be in stock. During pipe extrusion, disks for different pipe diameters are thus kept ready. This increases the storage requirements and the set-up time, as described above, the discs are changed.

Support devices are known from the prior art. For example, describes the DE 10 2004 059 515 B3 a device by means of which tube diameters are supported by a cylinder section with a circumferential groove. From the discs with different radii are arranged around a common pivot point.

The object of the invention is to provide a support device that makes it possible to dispense with the complex change of the discs.

The solution of the problem is characterized in connection with the preamble of claim 1, characterized in that the support device is formed by a juxtaposition of a plurality of pivotable disks with different support contour, wherein the discs in the erected state form spaced apart and parallel planes.

Training is provided that the support contour is designed as a radius.

The pivotable discs are arranged one after the other. By this arrangement, it is possible to make without changing the discs, to bring the respective desired disc for supporting.

It is advantageous if the radius of a first disc to the radius of the subsequent disc is larger or smaller, so when using multiple discs in a row, the radii from disc to disc either smaller or larger.

Each of the individual disks has an operation for pivoting, wherein advantageously the operation is seated outside the calibration and / or cooling device. The operation is in this case designed so that so that the pivotable disc can not only be engaged or disengaged, but also outside the calibration and / or cooling device, the position of the disc and the radius of the respective disc can be seen.

According to a further development, it is provided to actuate the respective disks from a central point. Calibration and / or cooling device may be a distance of several meters long, so that on this central actuating point not at several positions the support discs must be switched on or swung, but this is done centrally at a point on the calibration and / or cooling device , By means of such a central adjustment, several discs with the same radius can also be pivoted simultaneously.

Another possibility of the disc design is not to perform this one-piece similar to a half-shell, but to form a plurality of support members. It is thus conceivable not to pivot the disk as a whole, but to move the individual support members on their theoretical radius center or move away and thus bring this support disk in or out of engagement. The individual support members can also be constructed rosette-like similar to a Fotoblende and thus cover a larger diameter range, so that a plurality of tube diameter can be mapped with a support element.

Another solution to the problem is that the support area consists of several segments. It is therefore intended that the support region consists of several segments which extend largely in or against the extrusion direction and which are interconnected at one end, wherein the connected ends form a circular contour as a support contour with a radius, and wherein the segments at the other end outside, away from the pipe to be supported, have a slope.

Thus, in this embodiment of the support device, it is considered that the support region consists of several segments which are interconnected at one end and which form a circular section with a radius, the segments having a bevel at the other end.

The individual segments or the connecting piece of individual segments are firmly clamped on a radius which is at least equal to the largest diameter to be supported. The segments extend largely in or against the extrusion direction. At a distance which depends on the adjustment range to be achieved, a bevel is provided on the outside of the segments, ie away from the pipe to be supported. About the slope can be achieved by means of the movement of a plate having a corresponding slope at the inner radius, in or against the extrusion direction, a change in position of the free end of the segments. The envelope of the free ends of the segments thus approximates an adjustable inner radius for supporting the tube. The adjustment of the movable plate can be arranged both inside the bath and outside the bath. Several of these segment support units can be adjusted together. Via a control unit, a setpoint for a motorized adjustment can be specified.

Advantageous developments are shown in the subclaims 13 and 14.

In the drawings, an embodiment is shown schematically, it shows:

1 a calibration and / or cooling bath,

2 one of the support discs and

3 a further embodiment of the discs according to 2

4 another embodiment and

5 the example according to 4 in an adjusted state

1 shows a calibration and / or cooling device 1 , a plastic pipe passing therethrough 2 as well as three supporting disks 4 . 5 and 6 , Each of the support disks 4 . 5 and 6 is with a separate operation 7 equipped, by means of which the discs each individually against the extrusion direction 3 are pivotable. Each of the discs 4 . 5 . 6 has a different radius R. Advantageously, the radius R is across the discs 4 . 5 . 6 rising or falling, which ensures that the respective discs with the larger radius need not necessarily be disengaged when a disc with a smaller radius provides for the support of the tube.

One of the discs 4 . 5 or 6 is exemplary in 2 shown. The support disk has a radius R, which approximately forms a semicircle, wherein the arc should not be greater than less than 180 ° in order to avoid a clamping action of the disc around the extrudate. Each of the discs has its own pivot axis 8th on to this by means of the actuating element 7 can be pivoted.

An alternative embodiment of the disc is in 3 shown. In this case, the disc exists 4 from several segments 4a . 4b . 4c all at the same time around the common pivot axis 8th are pivotable and in connection with this. All three support members 4a . 4b . 4c have a common radius R, which is shown by the dotted line.

4 shows a support device consisting of several segments 9 is formed, with the segments 9 are connected to each other on at least one side and thus form a circular section with a radius R. The support device is on one side in a fixed plate 12 clamped, which with a movable plate 11 communicates. On this moving plate 11 are the segments? 9 over a slope 10 at. Will the movable plate 11 on the solid plate 12 moved to become the segments 9 over the slope 10 inevitably shifted from their spatial position and thus reduce on one side the radius R.

The same device is in 5 shown in a shifted position, which illustrates that the segments 9 in the area of the sliding plate 11 have a smaller radius R than that in the region of the fixed plate 12 is.

For the adjustment of the sliding plate 11 Both an operation inside and outside the calibration and / or cooling device can be provided. Of course, an electronic adjustment is conceivable. By suitable measures, the position of the displaceable plate can also outside the calibration and / or cooling device 11 be identified and thus the set radius are displayed.

It is particularly advantageous if such adjusting devices (also those according to the first embodiment) are in connection with the control of an extrusion plant and thus, for example, further process variables such as the mass gap on the extrusion die or the speed of a trigger can be set.

LIST OF REFERENCE NUMBERS

1

Calibration and / or cooling device

2

Plastic profile

3

extrusion direction

4

first pivoting disc

5

second pivoting disc

6

third swiveling disc

7

activity

8th

swivel axis

9

segment

10

Sloping on 9

11

sliding plate

12

solid plate

R

radius

Claims (14)

Device for supporting a plastic profile, in particular for a plastic pipe, in a calibration and / or cooling device ( 1 ), which has a support area in which the plastic profile ( 2 ), characterized in that the supporting device by a juxtaposition of several successively arranged pivotable discs ( 4 . 5 . 6 ) is formed with different support contour, wherein the discs ( 4 . 5 . 6 ) in the erected state form spaced-apart and parallel planes. Support device according to claim 1, characterized in that the support contour is a radius (R). Support device according to claim 2, characterized in that each of the discs ( 4 . 5 . 6 ) a separate pivot axis ( 8th ) having. Support device according to claim 3, characterized in that the radius (R) of a first disc ( 4 ) to the radius of the following disc ( 5 ) is larger or smaller. Support device according to claim 4, characterized in that each of the discs ( 4 . 5 . 6 ) an actuation ( 7 ) to pivot. Support device according to claim 5, characterized in that the actuation ( 7 ) outside the calibration and / or cooling device ( 1 ) sits. Support device according to one of the preceding claims, characterized in that the pivotable disc ( 4 . 5 . 6 ) by means of the actuation ( 7 ) is engageable or disengageable. Support device according to one of the preceding claims, characterized in that the actuation ( 7 ) is arranged centrally for the simultaneous pivoting of several panes. Support device according to one of the preceding claims, characterized in that outside the calibration and / or cooling device ( 1 ) the radius (R) of the disc ( 4 . 5 . 6 ) is recognizable. Support device according to one of the preceding claims, characterized in that outside the calibration and / or cooling device ( 1 ) the position of the disc ( 4 . 5 . 6 ) is recognizable. Support device according to one of the preceding claims, characterized in that the disc ( 4 . 5 . 6 ) of several support members ( 4a . 4b . 4c ) consists. Device for supporting a plastic profile, in particular for a plastic pipe, in a calibration and / or cooling device ( 1 ), which has a support area in which the plastic profile ( 2 ), characterized in that the support region consists of several segments ( 9 ), which extend substantially in or against the extrusion direction and which are interconnected at one end thereof, wherein the connected ends form as a support contour a circular portion with a radius (R), and wherein the segments ( 9 ) at its other end outside, away from the pipe to be supported, a slope ( 10 ) exhibit. Support device according to claim 12, characterized in that the slope ( 10 ) on a sliding plate ( 11 ) can be applied. Support device according to claim 13, characterized in that the segments ( 9 ) by displacement of the plate ( 11 ) are variable in their spatial position and thus the radius (R) of the circular section is increased or decreased.

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