DE2456830C3 - Device for pulling off extruded profiles made of plastic - Google Patents

Description

The invention relates to a device for pulling off extruded profiles made of plastic.

In the case of extruders or heating furnaces, they are used to prepare forgings for the following operation often grippers or special manipulators are used, especially when it comes to weight heavy workpieces.

In the case of die-casting machines, too, it is common to provide special grippers that take that from the die-casting machine Grasp the ejected die-cast part and take it to another place of work.

In general, these known devices are tools that are in more or less long time intervals, depending on the number of shots of the die casting machines or depending on the work process and the transport path of the gripper itself are used.

There are also caterpillar haul-offs for extrudates made of plastic with two pairs arranged one above the other Known caterpillars, the lower support being adjustable pneumatically. Likewise is no longer new, in caterpillar belts that can be manually adjusted parallel to each other in height for pulling off plastic extrudates to use. Finally there are trigger wheels that can be adjusted and locked using a lever system for peeling off extruded objects.

The invention is based on the object of a device for pulling off extruded profiles made of plastic, with which it is possible to produce plastic parts extruded from an extruder, such as plastic profile, Pipes, hoses and other extrusions are continuously withdrawn in a pull-off device.

Is achieved the object set in the device in question for withdrawing the extruded plastic profiles with a bead or strip take-off of two pairs arranged one above another in height parallel to each other adjustable ^ή 5 and on the extruded profile can be pressed trigger crawler or belts, wherein the lower pull-off belt can be adjusted and locked manually to the required height via a threaded spindle, according to the invention in that it can be pressed against the exuded profile via a compressed air cylinder and a lever system and via individual pistons arranged in a closed hydraulic bed, which are attached to the via rollers or chain sprockets act upper haul-off belt, can be matched in series to the individual profiled areas, and that the adjustment movement of the threaded spindle can be transferred to the lower haul-off belt via a further lever system known per se. In a further embodiment of the invention, the pistons arranged in the closed hydraulic bed can automatically be matched to the individual profile areas.

With the device according to the invention it is achieved with great certainty that the upper caterpillar cleat chain adapts to the respective profile of the plastic part to be detected, the lever systems on the the entire length of the caterpillar stud chains assigned to the profile areas act.

In the drawings, the invention is shown schematically in one embodiment of a device and is described in more detail below. It

F i g. 1 shows a side view of the device and

FIG. 2 shows a section along the line / \ - ß in FIG. 1.

The device for pulling off extrusions is a box-shaped, stabilized welded construction, in the two paired caterpillar cleat chains 6 are arranged to plastic profiles, pipes, hoses and to be able to pull off other extrusions in a take-off device.

Two caterpillar cleat chains 6, which are arranged in pairs as Kcttenumlaiif, act as the main pulling elements are.

The cleats of the chain are glued to metal plates and are interchangeable with the corner brackets of the Chain screwed. The caterpillar guide of the upper haul-off caterpillar 1 and the lower haul-off caterpillar 2 or the upper and lower haul-off belts 1, 2 is each supported on two main shafts.

The bead tension of the upper haul-off bead 1 is used to generate the required surface pressure a lever system 3 is achieved, which is constantly tensioned with the aid of a compressed air cylinder 5.

To ensure an even contact pressure when the cross-section changes Reaching extrudate is the upper haul-off bead 1 with a number of pistons 7 fitted.

The pistons 7 are embedded in a closed hydraulic bed 11, whereby a level compensation is guaranteed what an elastic yielding of the upper caterpillar cleat chain 6 while maintaining the allows optimal contact pressure.

Via the bridge screwed onto the piston skirt, with the help of two rollers or chain pinions 8, the Transfer compressive stress to the upper caterpillar cleat chain 6.

In the case of the lower haul-off bead 2, the bead tension is controlled by the lever system 4 via a threaded spindle 9 manually adjusted to profile height and fixed.

The caterpillar haul-off is equipped with a pull-off force display, whereby the required pull-off force can be set and is measurable. A digital speed display is used to set the optimum take-off speed built-in.

The drive 10 of the caterpillar haul-off device is controlled with the help of thyristors and thus offers the Possibility of external control.

For this purpose 2 sheets of drawings

Claims (2)

Patent claims: I. Device for drawing off extruded Profiles made of plastic with a caterpillar or band ab / ug of two pairs arranged one above the other, adjustable in height parallel to each other and can be pressed against the extruded profile Haul-off caterpillars or belts, the lower haul-off belt by hand via a threaded spindle can be adjusted and locked to the required height, characterized in that the upper Take-off belt (I) over a pressure cylinder (5) and a lever system (.}) can be pressed against the extruded profile and over individual in a closed Hydraulic bed (11) arranged piston (7), which via rollers or chain scratches (8) on the upper haul-off belt act, can be adjusted in series to the individual prol'il areas, and that the adjustment movement the threaded spindle (9) via another known lever system (4) on the unlere take-off belt (2) is transferable. 2. Apparatus according to claim 1, characterized in that in the closed hydraulic bed arranged piston (7) can be automatically adjusted to the individual profile areas.