DE7612243U1 - DEVICE FOR THE PRODUCTION OF A STRANDED PROFILE - Google Patents

Description

Introduction to the description

Extrusion has long been a known process for producing strand-like profiles. For example Extruded profiles made of rubber or a corresponding material for framing windows in window frames, such as it is common in vehicle construction, almost exclusively manufactured using the extrusion process.

The advantage of the extrusion process is that it is is an inexpensive procedure to be carried out. The disadvantage of the process is that so far only profiles have to be produced are constant in the direction of injection

Exhibit image.

The disadvantage of the known method has, for example; As a result, the edging profile for partially curved vehicle windows are extruded without a groove for the window and then inserted the necessary groove into the profile;

must be brought. This groove must be approximately helical 1

I run shaped over the length of the extruded profile, and the. | Production of such a groove in an extrusion process has not yet been possible. The groove is worked in therefore in such a way that the extruded profile

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is clamped accordingly rotated about its longitudinal axis between parallel lateral clamping jaws and that these clamping jaws at the same time the guide for a cutting device guided over the extruded profile for working in the groove.

This method is complex to carry out and has the disadvantage of additional material loss.

The object of the innovation is to create a device for performing a method with which in such and similar cases, the cross-section of the extruded profile along its length during extrusion in a simple manner Way can be changed.

To solve this problem, the innovation is based on a solution in which the circumferential contour of the nozzle-like Exit device is changeable during the extrusion process. So it's supposed to be used for extruding one certain profile cross-section can be defined, this Cross-section can be changed continuously or intermittently during extrusion. It is open In this way it is possible to produce an extruded profile whose cross-section changes over the length of the strand, but with

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this change is effected during the manufacture of the profile. It is possible, for example, to use an extruded profile with an outer contour that is constant over the length of the strand and into which a longitudinal groove is made during extrusion that changes its position to a reference edge of the trofils over the length of the strand, with the groove itself has a constant or a variable cross-section. If necessary, the change in cross-section be effected so that after a certain length of strand a separation of the extruded Strand from the following strand part takes place. The design of the profile cross-section and the change such a profile cross-section over the length of the There are practically no limits to the strand. Any profile resulting from practical requirements can be made.

This device according to the innovation is essentially characterized in that the material to be extruded flows through a constant outlet contour or through-flow disk is arranged that A profile protrudes into the free space for the material to be extruded, which is bounded by the exit contour and that the profile and disc are adjustable relative to one another.

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It is already known to work with two disks when extruding, one of which is the disk The basic contour of the profile is defined and the assigned pane changes the basic contour with an additional contour. It was only a matter of using a single basic contour by assigning various additional contours to be able to produce several profiles. When the device is not in use, an additional contour was created for this purpose replaced by another, while the two contours were set against each other during extrusion. at the innovation, however, the two contours are changed against each other during operation, see above that the cross section of the extruded profile is changed over the length of the strand during extrusion.

Uxe jjosuiig QeS varunageaanKeiiö iur ax neueanysyaitänke Device can be represented in various ways. In the simplest way, a disk is connected to the A further disk with the additional contour is assigned to the basic contour and both disks are being extruded adjustable relative to each other, the formation of the basic and additional contour depending on the needs. The profile circumference can change its shape with the same or different lengths. A change

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if the length is the same, for example, a groove with the same cross-section closes its position a reference edge of the profile changes. A change in the case of a variable length is given, for example, if the cross-section of the groove is changed over the length of the strand.

However, designs are also possible in which the basic and additional contours are concentrically inserted into one another and their Change position to each other. Each contour is expediently limited by a component that follows works on the principle of photo closures, i.e. several pane segments more or less overlap and thereby limit a more or less large contour.

It is essential in all solutions that the pressure occurring during extrusion does not inadmissible the adjustment movements obstructed and that the adjustable parts are easily accessible for the adjustment mechanism. The first call can be met when the adjustable component with the additional contour in the feed direction of the to be extruded The material seen behind the non-adjustable component is arranged with the basic contour, so that the non-adjustable Component absorbs the extrusion pressure. Is the arrangement

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conversely, suitable pressure recordings may also have to be provided. The second requirement can be met if the adjustable component is at the end of a substantially tubular Guide arranged for the material to be extruded is, since then the adjusting elements can easily be brought up to the adjustable component from the outside.

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Figure description

The drawing described below provides additional explanation of the innovation. The essential Features of the innovation are the subject of the claims for protection. In the drawing show:

1 shows a section along the line I-I in FIG. 2, 2 shows an arrangement according to the invention in schematic form Depiction,

Fig. 3-6 extruded profiles to be produced with devices according to the innovation.

In a known manner, a feed hopper 2 is arranged at one end of an essentially tubular guide 1, with which the material to be extruded is introduced into the guide 1 in the form of a preformed blank. Suitable means provide the blank with a feed rate with which the blank passes through the extrusion tool esa. the other end of the guide 1 is passed through and the desired cross-section is imparted to it. The extrusion tool consists of a basic contour part 3, which is held firmly and without play in the guide 1, and an additional contour part 4 which is adjustable with respect to the basic contour part 3. In the basic contour judgment is the basic

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contour 5 incorporated, which is shown as a rectangle for the sake of simplicity, but also any other may have the required shape, provided that an extruded profile has a corresponding basic cross-section should have the additional contour part 4 rag. with a nose 4a into the basic contour 5, so that the basic contour part 3 and additional contour part 4 together form the cross-section of the to extruding extruded profile. Instead of with. the Nose 4a, the additional contour part can also protrude into the basic contour with a desired other contour, to define a desired cross-section.

The additional contour part 4 is adjustable in relation to the basic contour part 3 by the cross section of the extruded profile to be able to change during extrusion. For the embodiment it is assumed that the additional contour part is adjustable in the direction of the double arrow 6, so that the extruded profile with a rectangular basic cross-section has a longitudinal groove which is constant over the entire length of the profile, namely the part of the Nose 4a, which protrudes into the rectangular profile of the basic contour part, that this groove is in the top of the profile, however, has a changing distance from the upper side edges of the strand over the length of the strand.

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By additionally moving the additional contour part 4
could be changed perpendicular to the double arrow 6 - for example, the depth of the groove.

To the additional contour part 4 compared to the basic contour part
3 to be able to move, is the additional contour part 4 with a | Groove 7 mounted on a pin 8 of the basic contour part. i. The movement takes place with an additional contour part 4

articulated lever linkage 9, 10. It is useful that the; To cause movement of the additional contour part 4 depending on the strand feed.

I For this purpose, there is provided a sensor 11 which .laß of the f

fs sagging of the extruded profile in a cooling bin 12 t

erroittext. Hängpfe aer S-braiig £ ü Very dureh, SO is the |

Feed too low, the sensor 11 causes the feed motor to feed faster and at the same time
the linkage 3, 10, the additional contour part 3 a faster | To communicate movement. Hanging the strand in the cooling bath too little \ by, the feed is too large, the sensor 11 is veran-: ■ Let the feed motor to feed slower and at the same * "\ time a slower movement of the additional contour part.
This solution assumes that the feed with a
Conveyor belt 13 takes place, which causes the advance as a train,

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which occurs when the extruded strand is transported away. However, a solution is also conceivable in which the advance is brought about by a suitably applied compressive force, in which case a too much sagging Strand an indication of too great a feed and a strand that is stretched too tightly a reason for too little Feed is.

If necessary, the basic contour part and the additional contour part can be designed and assigned to one another in such a way that after a certain length of the strand-like profile, a work cycle is inserted which separates the finished profile strand from the next strand part, so that automatically not only strand profiles with a cross-section f that changes over the length of the strand but snoh. mi -h sines' specific strand length can be manufactured.

In the case of the solution as shown in FIG. 1, 2, FIG. 1 being a partial view of the arrangement according to FIG. 2 represents the section I-I, the additional contour portion lies 4, seen in the feed direction of the material, behind the main contour part 3, in order to be relieved of the extrusion pressure to be and to be easily adjusted. If the arrangement is reversed, it is useful to use this

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Reason to reserve a pressure reliever for the additional contour part . Compared to this solution, however, the first solution has the additional advantage that the adjustment linkage can easily be brought up to the additional contour part from the outside.

The control of the Verstellgestänges can be carried out in such a manner that on a rotatable drum 14, a control bar 15 mounted on the _r is a sensor applied sixteenth The drum 14 is rotated according to the strand feed recorded by the sensor and the bar is designed according to the desired profile change. The sensor is swiveled according to the course of the bar and adjusts the adjustable additional contour.

Some extruded profiles which can be produced with a device according to the innovation are shown in FIGS. 3 to 6. In Fig. 3 shows a rectangular profile of constant width, but changing thickness. In Fig. 4 is a rectangular profile constant outer circumference provided with a groove, which its course with respect to a reference edge of the extruded profile changes. In Fig. 5 groove section are incorporated into a corresponding rectangular profile and Fig. 6 shows an extruded profile with a circular cross-section

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and diameter changing over the length of the strand. Fig. 6 shows that it is also possible to produce several strand sections by the diameter between individual strand sections is reduced to zero.

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Claims (5)

S ■ · Applicant ; HÜBNER Gummi- und Kunststoff GmbH. Agathofstrasse 15, 3500 Kassel-Bettenhausen Title ; / device for making a strand shaped profile ρ Protection claims 1 «, device for forming a strand from a nozzle extrudable profile with a fixed contour part of the nozzle and one with the fixed contour part ** part continuously adjustable during extrusion bar connected contour part, characterized that the fixed contour part is a closed line and that the adjustable contour part on the front or The back of the solid contour part rests and in the free space delimited by the solid contour part protrudes. * 2. Device according to claim 1, characterized in that that the solid contour part is arranged in a disc through which the material to be extruded flows, that in the space bounded by the contour part for a profile protrudes into the material to be extruded and that the profile and disc are adjustable relative to one another. 3.4.78 - 2 - 7612243 July 6th. 78 y Λ · 3. Device according to claims 1 and 2, characterized characterized in that the disc is stationary and that protruding into the free space of this exit contour Profile is adjustable relative to the disc. 4. Device Bach claims 1 to 3, characterized characterized in that the profile is located on the downstream in the feed direction of the material Side of the disc is arranged. 5. Device according to claims 1 to 3, characterized characterized in that the profile on the side facing the feed direction of the material Disc is arranged. H 64 GM 116 3.4.78 - 3 - 7612243 07/06/78