DE3024736C2 - Device for the production of corner connections of sealing profiles for windows, doors or the like. - Google Patents

Description

The invention relates to a device for producing corner connections of sealing profiles of the type mentioned in the preamble of claim 1.

To seal between the outer frame and casement of windows, door leaves, etc., it is necessary to to create circumferential sealing profiles within the frame. To make a full seal too received, care must be taken that the circumferential sealing profile strand is also self-contained, d. H. that at the frame corner points the profile ends abutting there are also connected to one another are. For this purpose, the ends of the profile strands butting against one another in the corner areas are each cut obliquely by means of a miter cut so that the miter points of the two Profiles arriving in different directions lie against one another and then by gluing, welding or (in the case of rubber profiles} vulcanizing.

To produce such corner connections of sealing profiles by welding the profile ends So far it has been necessary to each other, initially in one

ι ⁵ cutting or punching device, the ends of the individual profile strands to produce the desired miter bevel «. to punch in an inclined manner, in order then to weld the ends of such stamped profile strands together in a device-technically separate operation on a suitable welding device. A perfect connection of the sealing profiles in the corner areas of the frame has proven to be difficult in many cases, whereby the occurrence of slits, uneven connection points and the like can considerably reduce not only the sealing effect of the seal, but also its heat and sound insulation. In order to avoid such difficulties, it is particularly important that the miter cuts at the profile end points are carried out particularly carefully and uniformly and that the welding can also be carried out under uniform conditions as far as possible in the entire welding area. Only if these requirements are met can time-consuming, costly and labor-intensive reworking of such corner connections be avoided.

A known welding device for welding the end points of sealing profiles, in particular for corner connections, is described in DE-GM 79 11 997. The in an upstream work step provided with the miter cut two profile ends are in this known device in two Profile mounting devices inserted, which are arranged on a base plate on which there is also a Welding device with a welding hatchet is located. The two mounting devices are in one Angle so arranged to each other and their end faces corresponding to the miter angles on the Profile end points aligned so that after inserting the profiles, the mounting devices in the longitudinal direction of the profile can be moved towards one another at an angle so that they can be brought into contact with one another, that the profile end points to be connected lie exactly against one another. There is also a welding device provided with a fixed welding hatchet, on which the two mounting devices in such a way are displaceable that the miter surfaces to be connected to the profile ends from both sides of the welding hatchet can be pressed against this. This will set the corresponding endpoints the two profile ends sufficiently heated so that then by removing the holding devices by the welding ax and by immediately manually pressing the two holding devices together (and thus also the heated profile end points on each other) the desired welded connection can be produced. This known device

with correct operation allows a satisfactory welding of the ends of sealing profiles, in particular for the production of corner connections, too, but this requires a remarkable mechanical Use by not only having a relatively large base plate with the mounting directions opposite the welding ax movable, but also the two mounting devices in turn opposite the they must be movable to the supporting base plate. These multiple, superimposed shifting movements also require the operator to pay attention to the required Correct coordination of the individual movements in relation to one another. It is z. B. to ensure that the two miter sections of the profile ends receiving holding devices before they are brought up to the The welding hatchet must not be pushed together completely, as this would lead to the insertion of the welding hatchet between them (to heat the end faces of the profiles) the operator is no longer possible must therefore make sure that they both support devices after inserting the profiles only so far against each other that there is a sufficient gap remains to introduce the same when shifting with respect to the fixed welding ax to allow between the miter sections. Furthermore, the known device can only be used as a welding device; the previous inclined cutting of the profile ends to produce the desired precise miter cut is not possible with this known device possible.

A device of the type mentioned in the preamble of claim 1 is disclosed in US Pat. No. 3,186,891 known. In the known device, the holding devices are at an angle to one another arranged that after inserting the profiles in the holding devices, the profiles by moving the holding devices can be brought into contact with one another in the longitudinal direction, so that the to be connected profile ends are exactly against each other. From this angularly offset arrangement of the holding devices follows that both profile strands in the two holders in the longitudinal direction must be positioned. The waste incurred when making the miter cut can vary depending on the Positioning of one or the other profile strand can be different. This is especially important when already measured profile strands are to be connected. In this case, it is a tedious and difficult one reproducible length positioning in the brackets required. This double length positioning must be done by hand, which is time-consuming and therefore expensive. Furthermore irt from the German Offenlegungsschrift 23 00 626 a welding device for in particular window frame profiles known from a tool table with a heated blade pivotable in a vertical plane and two clamping parts, which are at arbitrary angles to each other in a horizontal plane can be set and which by mechanical means of movement or hydraulic or pneumatic Moving means can be moved towards and away from one another without the angular position between them or the profiles stretched on them is changed. This known device has no cutting edge, which is why the clamped profiles are provided with a miter cut beforehand Need to become. The adjustment of the angle of the clamping parts only serves to adjust the clamping parts adapt the miter angle of the already precut profiles.

The invention is based on the object of creating a device of the type mentioned at the beginning, which are easier to use, & h. characterized by the smallest possible number of adjustment and work steps

ίο The solution to this problem is in the characteristic Part of claim 1 specified.

Further, advantageous refinements of the invention emerge from the subclaims.

The device according to the invention makes the production of hot-welded corner connections much easier: the aligned alignment of the grooves in both mounting devices enables a single profile strand to be inserted into both and, after the pivotable cover is closed, is fixed in a fixed position their mutually facing sides, as a result of end edges running obliquely to one another, release an angle opening towards one of their sides into which the welding element designed as a welding blade can be pivoted. The welding blade, which is preferably sunk into the base plate and can be swiveled out of the base plate by means of a foot lever, is then pivoted up out of the base plate with its shape precisely adapted to the angle between the two mounting devices (or inserted from above between the mounting devices), with in In this operation, the cutting edge of the welding blade cuts a substantially triangular section from the profile strand and at the same time creates the desired miter cut on the profile on the end side of each of the two mounting profiles. The originally continuous profile strand is now divided into two sections by this punching process, each of which ends in one of the profile pieces. Since the cutting blade here also functions as a welding ax, this means that during and after the cutting out by the cutting element, the two then existing profile sections are each heated at their obliquely cut ends (to temperatures that are to be selected depending on the material , but must always be above 100 ^° C. to ensure a clean weld). After this has been done (the heating facilitates the cutting process), the welding blade is again folded out of the plane of the profile strand, in direct connection with this only a simple manual (or also automatically executable) pivoting of the pivotable holding device is necessary in such a way that it comes to rest with its inclined side edge on the inclined side edge of the other mounting device. 1st this easily and quickly executable rotary movement takes place, then the heated just by the hot blade welding interfaces are of the two profile sections in the hot state ^fe 5 to each other. Pressing the pivotable mounting device against the other then produces the desired welded connection, whereby the simplicity of the rotary movements to be carried out

operation does not allow any operating errors.

Preferably, only the support means is pivotable, while the other is fixedly mounted on the base plate, whereby the operator only a rotation of a Halterungseinrich- ^r> tung effect and has only to exert on this the contact pressure.

A preferred embodiment of the device according to the invention is that the welding blade is provided with a cutting edge both in the swiveling-in as well as in the swiveling-off direction. This makes it possible for the welding blade to always have only one for the cutting and heating process Carry out a relative movement from below the inserted profile strand to above (or vice versa) must and pivoting back into the starting position is no longer necessary. Because the countermovement the welding blade then becomes a miter cut for the subsequent production of a corner connection exploited.

Advantageously, the welding blade is also designed as a heatable protractor and consists of Again, preferably, made of steel or copper with a layer of polytetrafluoroethylene, silver or chrome, which allows the welding residue to be wiped off more easily after each miter cut. Furthermore, the plane of the cutting edges is preferably inclined to the direction of cutting movement employed. The device according to the invention has a particularly simple structure and is without Risk of incorrect operation can be operated safely even by completely unskilled operators. A Moving different individual elements against each other, also in the context of superimposed ones Displacement movements is also not required in the device according to the invention. Moreover, will here also the great advantage achieved that the precise production of the miter cuts as well as the execution of the heat welding process can be carried out on one and the same device, with a Unclamping and renewed clamping of the profiles (with possible irregularities in the alignment to each other) is safely avoided. Once inserted, the profile strand is in a fixed position brought within which it remains during the individual processing steps and from which the whole precisely and precisely producible miter cuts are forcibly transferred into a precisely defined and fixed welding position will.

Furthermore, a stripping device is preferably provided, by means of which the welding device cleaned when swiveling out of the visual white layer will. This eliminates contamination of the welding surface as a result of adhering (melted) Mechanically remove the profile material immediately after welding. Likewise preferably can this removal of such undesirable deposits on the welding surface also z. B. by immersing the Welding knife in suitable chemical solvents or by briefly heating up the welding e> o knife at very high temperatures.

The invention is explained in more detail below with reference to the drawing. It shows

F i g. 1 shows a plan view of a t> i according to the invention Device with inserted profile strand;

2 shows the side view of a mounting part in a device according to the invention with an inserted profile strand and a closed cover;
F i g. 3 shows a detail section according to AA from FIG. 1;
4 shows a plan view of the device according to the invention after rotation of a mounting device (welding position);

F i g. 5 shows a principle view of a cutting blade with an inclined cutting edge plane.

In the case of the in FIG. 1, the mounting parts 2 and 2 are side by side on a base plate 1 3 attached. In this is an extruded profile 4 made of PVC or another suitable flexible and weldable Material is inserted into a receiving groove 5 (FIG. 2) formed in each holder part 2 and 3. Included consists of this holder part 2 or 3, as in FIG. 2 shown, from a lower mold 14, which is preferably made of aluminum t / the synthetic resin. In this The receiving groove 5 for the sealing strip is let into the lower mold 14. On top of the Lower mold 14 is attached, pivotable upwards, a cover 15, which is also preferably made of aluminum or synthetic resin is made. In the illustration according to FIG. 1 are after the insertion of the profile 4 the two covers 15 of the holding devices 2 and 3 for fixing the position of the extruded profile within the Retaining devices closed. While the mounting device 2 is rigid on the base plate 1 is attached, the mounting device 3 is mounted about a pivot axis 8 so that it is in the with a Arrow in FIG. 1 marked direction of rotation against the other Hallerungseinrichtung 2 up to the system can be pivoted (cf. pivoted illustration in FIG. 4). The support devices lying next to one another 2 and 3 each have two mirror images on their mutually facing sides mutually extending sloping edges 6 and 7, respectively. These lie in two planes that are in the axis of rotation 8 of the holding element 3, this axis being offset somewhat to the side of the profile strand 4 is arranged. The inclined side edges 6 and 7 of the mounting devices 2 and 3 then extend from the Axis of rotation 8 from in an angle that opens towards the profile strand! to the side edges of the Profile devices 2 and 3, which also run at a lateral distance from the profile strand 4.

A welding blade 9 in the form of a protractor with a polytetrafluoroethylene or chrome plating 12 is provided (see. Also illustration according to FIG. 3) and the one at its upper edge Has cutting edge 11 can be pivoted up from below from the base plate 1 to the between the two inclined edges 6 and 7 extending section of the profile strand 4 to be punched out (cf. also F i g. 3). When the welding blade 9 is pivoted out of the base plate 1 into the cutting plane first cut out the middle section of the profile strand 4 (and suitably thrown off, which is not is shown) and at the same time by the heated outer surface of the welding blade 9 in the holding devices 2 and 3 clamped, cut end points of the profile 4 to the required Bring temperature, which is over 100 ° C, with PVC materials preferably up to 180 ° C. After pivoting the welding blade 9, z. B. again after down into the base plate 1, the operator then sets the pivotable mounting device 3 (with the lid still closed) including the measuring rod 10 and the protruding part of the Profile strand 4, the end of which for precise position fixing

tion is clamped at the end of the measuring stick by means of a clamping device 13, in which in FIG. 4 shown Pivoted position: in this position, the heated interfaces of the two sections of the Profile strand 4 against each other in the correct alignment to the system and are pressed against each other welded together in the exact position.

Instead of being pivoted down into the base plate, the welding blade could of course can also be swiveled upwards, whereby they are in ι ο In this case, however, must be swiveled up so far that the insertion of the profile strand 4 in the Mounting devices 2 and 3 and the pivoting of the mounting device 3 by the operator not disabled. If the welding blade, as described in the illustration of Fig. 1, down in the base plate 1 is swiveled in, then it is advisable to use the welding blade 9 by the operator to operate with the foot operated swivel device. In this case, the base plate 1 preferably designed as a suitable small standing table, the one below with the necessary pedals and houses the mechanism for moving the welding blade 9 up and down. Intended to However, the device can be used in many ways and can be easily transported, it is recommended that the pivoting to provide the welding blade upwards (e.g. in the form of a rotary pivoting upwards out), whereby the pivot mechanism can then be attached to the top of the base plate 1 and their Execution as a standing table or similar is no longer required.

The measuring plate 10 can, however, also be attached to the base plate 1 in a non-pivotable manner. Here, the profile-tension clamp is slidably mounted on the anvil>> 13: After inserting the profile strand that is pulled up to the desired first, aligned on the leveling pole length, clamped, cut and welded. Then the holding devices 2 and 3 are opened again, the welded corner connection is removed, the profile strand 4 with the corner connection is again drawn on the side of the measuring stick according to the desired length, tensioned again, cut and welded. This can be continued until the sealing frame is completed: for the last frame corner, only the two remaining blunt ends of the strand are then inserted into the device, mitred there and welded to the finished frame. In this way, starting from an endless strand, the continuous production of even closed sealing frames is easily possible.

Finally, in FIG. 5 there is still a principle Side view of a welding blade 9 is shown, in which the plane in which the angled cutting edge 11 is arranged, is inclined to the direction of movement (arrow) during the cutting process at an angle λ, which is chosen to be smaller than 90 °. This makes the effort during the cutting process easier by not at the same time the cutting edge 11 over their whole Cutting length comes into cutting contact with the profile strand 4, but only the with increasing cutting path the full cutting length is carried out. First comes the foremost, facing the profile strand (in Fig. 5: the top) tip of the welding blade to the profile strand, the cutting process starts there locally, and as the cutting path increases (i.e. the stroke path of the welding blade 9), the cut on the profile strand 4 always carried out only in a small local cut area, which means that only small forces are used enables.

In order to prevent anything still adhering to the welding blade 9 when the welding blade 9 is pivoted out of the welding position To remove the sealing profile material again from the welding blade 9 and to bake the same to her avoid, it is advisable to provide a suitable (not shown) mechanical wiper device, which automatically strips off any adhering material when the welding blade is swiveled out. Any suitable device in the form of its own scraper, scraper or the like can be used for this. Alternatively, the welding blade 9 could also be immersed in a suitable chemical solvent or also a short-term heating of the welding blade to a very high temperature (during the pivoting process) are provided.

For this purpose 2 sheets of drawings

Claims (6)

Patent claims: 1. Device for the production of corner connections of sealing profiles for windows, doors or similar, with a base plate, two profile mounting devices and means for cutting and welding together the profiles, which are respectively arranged on the base plate, in the case of each lower mold a profile holding device a receiving groove for the extruded profile to be held and a Cover or open the receiving groove has pivotable lid and in which the facing end edges of the holding devices mirror images of one another are, characterized in that the two holding devices (2, 3) on the Base plate are arranged with mutually aligned receiving grooves (5) and the End edges run obliquely to the direction of escape of the receiving grooves (5) and one on one Form the side of the mounting device (2, 3) opening angles that one of the two mounting devices (3) on the base plate (1) to apply its sloping end edge (7) to the edge (6) of the other mounting device (2) a pivot axis (8) is pivotably mounted, and that the means for cutting and Welding together from a shaped according to the angle between the end edges There are welding blade (9), which is also provided with a cutting edge (11). 2. Device according to claim 1, characterized in that the other holding device (2) is fixedly attached to the base plate (1). 3. Apparatus according to claim 1 or 2, characterized in that the welding blade (9) in both Is provided with a cutting edge (11) in the pivoting-in direction as well as in the pivoting-out direction. 4. Device according to one of claims 1 to 3, characterized in that the welding blade (9) made of steel or copper and facing the sloping end edges (6, 7) Surface is provided with a support (12) made of polytetrafluoroethylene, silver or chrome. 5. Device according to one of claims 1 to 4, characterized in that the cutting edge (11) the welding blade (9) lies in a plane which is at an angle in the direction of the cutting movement less than 90 °, preferably in the range between 45 ° and 60 °, is inclined. 6. Device according to one of claims 1 to 5, characterized in that a stripping device is provided, by means of which the welding blade (9) when pivoting out of its welding position is cleaned.