• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for welding two plastic profiles (1, 2) to each other, after which the two plastic profiles (1, 2) are held in a clamping device (3), to be welded end portions (8) of the two plastic profiles (1, 2 ) are heated with a heating element (10) and then the two plastic profiles (1, 2) with the heated end regions (8) are pressed against each other, wherein during the heating of the end regions to be welded (8) contact elements (7) of the clamping devices (3) against the heating element (10) are pressed, wherein the contact elements (7) respectively directly on one of the plastic profiles (1, 2) and directly to the heating element (10) are arranged adjacent, so that an end face of the contact element (7) with an end face ( 9) of the end region (8) of the plastic profiles (1, 2) to be welded is arranged in alignment. Furthermore, the invention relates to a corresponding clamping device for the plastic profiles (1, 2).
    公开号:AT520667A1
    申请号:T50959/2017
    申请日:2017-11-16
    公开日:2019-06-15
    发明作者:
    申请人:Ifn Holding Ag；
    IPC主号:
    专利说明:

    The invention relates to a clamping device comprising a first clamping element and a spaced second clamping element, between which a plastic profile can be clamped.
    Furthermore, the invention relates to a welding device for welding two plastic profiles together comprising a heating element, in particular a welding mirror, and at least one clamping device for clamping at least one of the two plastic profiles.
    In addition, the invention relates to a method for welding two plastic profiles together, after which the two plastic profiles are held in a clamping device, to be welded end portions of the profiles are heated with a heating element and then the two plastic profiles with the heated end portions are pressed against each other.
    Plastic profiles for windows and doors are usually welded in the corners today. In this case, a welding mirror is used to heat the Profilendbereiche to be welded. After the Profilendendbereiche have the right temperature for the connection, the welding mirror is removed and the two profiles joined together under pressure. This creates a weld bead, which subsequently has to be removed again because it disturbs the surface appearance of the windows or doors. In addition, the weld bead also disturbs the tightness function, since no circumferential plane is given.
    In order to avoid this bead, a great variety of devices and methods have already been described in the prior art.
    Thus, e.g. DE 23 28 357 A1 an Eckaußenform to prevent the formation of a Schweißwulstes during butt welding of thermoplastic plastic profiles having undercuts consisting of at least two diverging, in the contracted state, the profile fitting encompassing outer moldings, wherein in the region of substantially perpendicular to the diverging direction recessed undercuts each one the undercutting ausfüllendes, retractable at the beginning of the movement apart the outer mold and extendable again at the end of the collapsing mold element is provided, and the mold elements before starting the diverging movement perpendicular to the diverging or on an approximately perpendicular to the diverging direction extending arc from its Hin terschneidung mounted and swung can be swung out of their undercut by means of a special adjusting device and / or can be pivoted into it.
    DE 41 31 442 A1 describes a method for welding plastic profiles, in which both heated together to be welded plastic profiles at their end faces to welding temperature and are joined together after heating to the conditioning of the end faces together, wherein when joining bulges of the heated material both the outer surfaces as well as on the opposite inner surfaces arise and wherein the
    Outside surfaces of the profiles fitting means for limiting the outer
    Weld root are zusammenge drive before curing the outer bulge. The collision of the adjacent to the outer surfaces, the
    Weld root limiting facilities takes place with a time delay compared to the ancestor of the plastic profiles and after the free, unobstructed formation of the weld, up to a residual distance, the facilities the heated, on the original outer surface contour protruding material in the plastic state substantially outside the ver back pressure remaining within a time in which the viscosity of the plastic in the weld center is still lower than the viscosity of the
    Inner surface facing weld area.
    From DE 10 2015 013 439 A1 a method for welding two hollow profile bars made of plastic to form a window frame is known in which the profile bars to be joined together by inserting a welding mirror between the connecting surfaces and pressing them to the
    Welding mirror heated to form a Schweißwulstes to a predetermined temperature Tem and after removal of the welding mirror at the same time
    Magnification of the weld bead are joined together under pressure, wherein after removing the welding mirror on the visible surfaces of the later
    Window frame in the region of the joints of the two profiled bars ent outer parts of the welding beads are pressed inwards, then the welding mirror again between the connecting surfaces of the profile bars is moved and the connecting surfaces are reheated with simultaneous deformation of the internally pressed Schweißwülste and finally after removal the welding mirror, the connecting surfaces of the two profile bars are joined together. The apparatus for performing the method consists of a welding head with a welding mirror and two each having an upper and a lower limiting ramp and the two profile rods receiving and their connection surfaces against a welding mirror pressing clamping units, wherein in the region of the facing end faces of each limiting ramp at least one slide is guided, which is associated with a drive for short-term pressing against and deforming the outer part of the formed in the region of the visible surface of the later window frame Schweißwulstes.
    WO 2016/177715 A1 describes a method for joining plastic profile parts, wherein at least one profile part and a heating surface of a heating element are brought into contact with each other in a joining direction, in order to fuse the at least one profile part in its welding area before joining with the other profile part a limiting element is provided, with which a flow and deformation of the melt is controllable, wherein the limiting element has at least one contact element and a molded part, which are movable both to one another and to the profile part, wherein the
    Investment element is moved together with the molding in a melting of the at least one profile part from a rest position toward a working position relative to the at least one profile part and the heating element, wherein at least the molding at least during the melting in contact with the heating surface of the heating element and the contact element is held in contact with a profile surface, wherein the relatively movable contact element is moved together with the molded part in a switch from a melting to upsetting in the direction of the working position, that the limiting element projects beyond a free end edge of the at least one profile part, so that a holding plane formed is. It is thus the discharge of the melt during welding controllable and a shaping of the welding area in the connection itself influenced, so that a reworking can be omitted completely or at least partially.
    But it has also been proposed constructively simpler measures to reduce the Nachbearbeitungsaufwandes of welded profiles.
    Thus, EP 0 264 052 A2 describes a method for welding plastic profiles for window or door frames, wherein the plastic profiles are profiled at their ends to be welded prior to the welding operation to at least partially each form two parallel regions, of which the first region opposite projecting the second area, which are heated to a welding mirror and for welding these first portions of the two plastic profiles against each other and pressed, wherein on one side of these first areas of the displaced material, a Schweißwulst is formed, and the second portions of each plastic profile at least partially pick up material displaced during this welding process. The second regions are given a substantially continuous cross-sectional profile and adjoining the first regions, and are heated during the heating process over the first regions and also deformed during the welding process.
    All of these methods and devices work satisfactorily when the profiles are monochrome. However, problems arise when the profiles to be welded have decorative patterns.
    Object of the present invention was to provide an improved way to
    Connecting plastic profiles to each other to provide.
    The object of the invention is achieved with the clamping device mentioned above in that between the first clamping element and the second clamping element is arranged in a first direction adjustable contact element or that the second clamping element comprises the adjustable in a first direction contact element.
    Furthermore, the object of the invention with the above-mentioned Schweißvor direction is achieved, in which the clamping device is designed according to the invention.
    In addition, the object of the invention with the above-mentioned method is achieved, according to which it is provided that are pressed against the heating element during heating of the ends to verschwei sequent abutting elements of the clamping devices, wherein the contact elements each directly to one of the plastic profiles and directly to the heating element be disposed adjacent, so that an end face of the abutment element is arranged in alignment with an end face of the end region of the plastic profiles to be welded.
    The advantage here is that the investment element, the emergence of a
    Welding bead on the outer surface of the plastic profiles is prevented.
    Rather, the molten plastic is welded into the interior of the
    Plastic profiles displaced (usually plastic profiles for windows or doors are designed as hollow chamber profiles), where the excess material does not bother the appearance of the window or the door He. After already on the heat to be welded end portions of the material displacement takes place in the profile inside (the plastic profiles are pressed with pressure against the heating element, so that would already soften the plastic it to form the Schweißwulstes), the plastic profiles can be welded directly to closing together , So there is no further deformation of the soft end portions required, as is partially done in the prior art described above. This in turn has a positive effect on the strength of the weld, since any material manipulation after heating to cool the heated areas and thus to a reduction in the
    Weld strength leads. It could with the described procedure
    Weld bond strengths of the order of at least 90% of a conventional weld seam with bead formation can be achieved. Another positive side effect of the clamping device and the process carried out with it is that a groove formation in the corner, as is often seen in plastic windows, is no longer necessary. This also eliminates the subsequent color correction of this corner, if the plastic profiles are provided with decorative patterns. After this subsequent correction is usually done manually, for example by means of airbrush, thus a corresponding positive side effect can be realized by avoiding these manual steps.
    According to one embodiment variant of the tensioning device, it is preferably provided that the adjustable contact element has a spring element. It is thus possible that, according to an embodiment of the method, the Anlageele elements are each pressed with the spring element against the heating element.
    Thus, regardless of the course of the process, it can be better ensured that no gap is formed between the contact element and the heating element. In addition, it can thus be avoided that during the removal of the heating element Mentes soft plastic material over the visible surface of the plastic profile swells, as by the bias of the contact element with the Fe derelement the contact element after removal of the heating element automatically displaced protruding over the face of the plastic profile becomes.
    According to a further embodiment of the tensioning device can be provided that the contact element has at least one resilient element, so that according to a variant of the method, the contact elements are each pressed with the resilient element against the respective surface of the plastic profiles, the contact elements each with at least one resilient ele ment against the surface of each one of the two plastic profiles are pressed. It is thus possible to prevent a ripple of the surface in the connection region, as a result of which unsightly shadowing in the region of the weld can be avoided again, especially in the case of plastic windows or doors with decorative patterns on the surface.
    To improve the avoidance of the gap formation between the contact element and the heating element, according to a further embodiment of the tensioning device it can be provided that the contact element has a projection with a lower height compared to an overall height of the contact element.
    Due to the smaller contact surface influences of unevenness on an undesirable gap formation are better avoided.
    According to another embodiment of the clamping device can be provided that the contact element consists at least partially of a polymer which is selected from a group consisting of PA, PTFE, PEEK, polymeric plastics based on polyphthalamide (PPA). In particular, these polymers have proven to be advantageous not only because of the temperature resistance, but also because of the low adhesion friction to the heating element and to the plastic profiles. In addition, investment elements of at least one of these material have the advantage of low thermal conductivity, so that they can touch the heating element, in particular the welding mirror, directly, without cooling it. It is thus possible, despite contact of the contact element with the heating element to bring the temperature to at least approximately 100% in the plastic profile.
    For a better understanding of the invention, this is based on the following
    Figures explained in more detail.
    In each case, in a highly simplified, schematic representation:
    1 shows a welding device with a clamping device for welding plastic profiles.
    Fig. 2, the welding device with the clamping device of FIG. 1 in the
    heating position;
    Fig. 3, the welding device with the clamping device of FIG. 1 in the
    Heating position with already softened end portions of the plastic profiles;
    Fig. 4, the welding device with the clamping device of FIG. 1 in the joining position.
    By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.
    FIGS. 1 to 4 show method steps for welding a first plastic profile 1 to a second plastic profile 2.
    The two plastic profiles 1, 2 are shown greatly simplified. Usually, these plastic profiles 1, 2 are hollow chamber profiles, as used in the manufacture of windows and doors for the frame. The plastic profiles 1, 2 therefore have a plurality of hollow chambers in the interior, which are separated by webs. Since such plastic profiles 1, 2 are known per se from the prior art, reference is made to the relevant prior art for further details.
    As plastic for the two plastic profiles 1, 2, for example, PVC, PP, WPC (Wood Plastic Composite) can be used.
    The two plastic profiles 1, 2 may be blunt abutting or mitered welded together.
    Each of the two plastic profiles 1, 2 is clamped in a clamping device 3. After the two clamping devices 3 are preferably the same ausgebil det, only one of the two clamping devices 3 will be described below in the following. The corresponding embodiments can be transferred to the second clamping device 3.
    The clamping device 3 comprises a first (in the illustrated embodiment lower) clamping element 4 and a second (in the illustrated embodiment upper) clamping element 5. The two clamping elements 4, 5 may be so-called clamping jaws.
    The second clamping element 5 is arranged at a distance 6 to the first clamping element 4, so that the plastic profile 1 between the first and the second clamping element 4, 5 clamped and thus can be maintained during the entire welding process.
    The tensioning device 3 further comprises a contact element 7.
    The contact element 7 may be formed, for example, strip-shaped. It is arranged in the tensioning device 3 such that after clamping the plastic profile 1 in the tensioning device 3 and at the beginning of the process for welding the two plastic profiles 1, 2 together an end portion 8, i. an end face 9 of the end portion 8, projecting in the direction of a heating element 10, as shown in FIG. 1 can be seen.
    The heating element 10 is part of a welding device 11 for welding the two plastic profiles 1, 2. In particular, the heating element 10 is formed as a so-called welding mirror. At least one of the described tensioning device 3, in particular both tensioning devices 3, is / are also part of the welding device 11, the heating element 10 being arranged between two tensioning devices, in particular between two of the described tensioning devices 3, at the beginning of the welding process, as shown in FIG. 1 can be seen.
    The abutment element 7 is directed towards the heating element 10, i. adjustable in a first direction (= adjustment direction). For this purpose, the contact element 7 may be formed at least partially from an elastomer, so that the adjustability is obtained from the elastomeric deformability.
    However, the tensioning device 3 preferably also has a supporting element 12. This support element 12 is disposed between the first clamping element 4 and the second clamping element 5 and is preferably directly on the plastic profile 1 at. The support element 12 is designed to be shorter in the direction of the heating element 10, that is to say in the first direction, than the second clamping element 4 in the same direction. This results in a recess 13 in which the contact element 7 is at least partially received or receivable.
    But it can also be provided that the support element 12 is part of the second clamping element 4, that is, it is formed integrally therewith. In this case, the second clamping element 4 is designed to provide the recess 13 as an angle profile.
    Between the contact element 7 and a support element 12, at least one spring element 14 is arranged. Preferably, a plurality of spring elements 14 are arranged distributed over the width of the contact element 7 (direction perpendicular to the plane of the paper in FIG. 1), in particular two.
    The at least one spring element 14 - in particular, all the spring elements 14 are identical - may be coil springs. But it is also possible to use other spring elements 13, such as leaf springs or pneumatic or hydraulic cylinders.
    The spring element 14 or the spring elements 14 make it possible that they spend the contact element 7 protruding in the direction of the end face 9 of the plastic profile 1 and spend it in the relieved or at least partially relieved state, which is shown in Fig. 1.
    It should be mentioned in this context that the first clamping element 3 also does not extend into the end region of the plastic profile 1, that is, is arranged to spring back relative to the end face 9 of the plastic profile 1, as shown in FIG. Thus, the contact element 7 also projects beyond the first and the second tensioning element 4, 5 in the said direction.
    The at least one spring element 14 may be part of the contact element 7 or the
    Be supporting element 12.
    To limit the spring travel in the adjustment of the contact element 7, the contact element 7 with at least one connecting element, in particular at least one screw 15, preferably a plurality of connecting elements, in particular a plurality of screws to be connected to the supporting elements 12, as shown in Fig. 1 by dashed lines , The at least one connecting element can be arranged in a recess 16 of the contact element 7, wherein this recess 16 extends continuously in the direction of the support element 12 by the contact element 7. In the front end region, the recess 16 may have a stepped deposition. It is thus possible to arrange the at least one connecting element recessed in the contact element 7. Further, in the case of a screw 15, this is formed in the region of the contact element 7 with a smooth surface, so that the Anlegeele-element 7 can move freely in the adjustment.
    The fact that the contact element 7 is slidably held in the recess 13, it is therefore possible that it is adjustable in the adjustment.
    According to one embodiment variant of the tensioning device 3, it can be provided that the second tensioning element 5 comprises the contact element 7 which is adjustable in the adjustment direction, that is, it forms part of the second tensioning element 5. This can for example be achieved in that the contact element 7 is at least partially formed of a deformable, that is adjustable in the adjustment, elastomer, which optionally still has at least one cavity in the interior. With the cavity of the adjustment can be increased or the adjustment can be simplified.
    In the preferred embodiment of the tensioning device 3, the adjustment is away of the contact element 7 is not so large that it completely out of the Ausneh 13 slips out. It thus has a constant guidance through the system on the surface of the recess 13. However, according to another embodiment variant, it is possible for the latter to not continuously guide the contact element 7 through the surface of the recess 13.
    According to a further embodiment of the clamping device 3, which is shown in Fig. 1 on the basis of the right clamping device 3 for the plastic profile 2, it can be provided that the contact element 7 has at least one resilient element 17. This resilient element 17 is arranged on the, the contact surface to the plastic profile 2 opposite surface of the contact element 7, ie in particular on the upper surface.
    In the simplest case, this resilient element 17 may be formed as a survey, which has a cavity 18. Through the cavity 18, the survey is compressible.
    But it is also possible that similar to the execution of the spring element 14, the ses resilient element 17 is also designed as a spring and optionally connected to a bar which rests against the surface of the recess 13, although the former embodiment is structurally much simpler.
    Preferably, a plurality of such resilient elements 17 are arranged.
    In a modification thereto, the at least one resilient element 17 may alternatively or additionally be arranged on the lower surface of the second tensioning element 5 which partially bounds the recess 13.
    With the resilient element (s) 17, a better contact of the contact element 7 can be achieved on the surface of the plastic profile 1, 2, whereby a ripple of the plastic profile 1, 2 can be better avoided due to welding.
    It can be provided according to a further embodiment of the clamping device 3, that the contact element has a projection 19 with a comparison with an overall height 20 of the contact element 7 lower height (in the same
    Considered direction). To form this projection 19, the contact element 7 may be designed with a bevel 21. But it is also a stepped transition into the projection 19 possible.
    The projection is arranged or formed on the surface of the contact element 7 pointing in the direction of the heating element 10, as can be seen from the figures.
    The contact element 7 is according to a further embodiment of the
    Clamping device 3 preferably for the above reasons at least partially consists of a polymer which is selected from a group consisting of PA (polyamide), PTFE (polytetrafluoroethylene), PEEK (polyetheretherketone), polymeric plastics based on polyphthalamide (PPA), thermosets.
    In particular, a (polymeric) material (plastic) is used for the contact element 7, which has a dimensional stability up to at least 300 ° C.
    The abutment member may also be fiber reinforced, for example with mineral fibers, such as mineral fibers. Basalt fibers, or with glass fibers or carbon fibers.
    The fiber content of the polymer for the contact element 7 can be between 10
    Wt .-% and 70 wt .-%, in particular between 30 wt .-% and 65 wt .-%, be.
    As already stated, the clamping device is used in a welding device 11 for carrying out the method for welding two plastic profiles 1, 2 together. For this purpose, the two plastic profiles 1, 2 are clamped in each case a clamping device, wherein at least one clamping device, preferably both clamping devices, is formed by the clamping device 3 described is / are. The two plastic profiles 1, 2 are held in the clamping devices 3 of the entire welding process.
    Between the two plastic profiles 1, 2, the heating element 10 is arranged. Thereafter, the two clamping devices 3 are employed according to arrows 22 against the heating element 3. By this hiring reach the contact elements 7 for gapless contact with the heating element 7, wherein they are moved during the application further into the recesses 13 until the end faces 9 of the plastic profiles 1, 2 abut surfaces of the heating element 10, as shown in FIG. 2 is shown.
    Due to the heat radiating the heating element 10, the end portions 8 of the
    Plastic profiles 1, 2 softens, as indicated in Fig. 3 by the hatching. At the same time, the plastic profiles 1, 2 are further pressed against the heating element 10, so that they are adjusted by reaching the end regions 8 in the direction of arrows 22. During the heating of the end regions 8, the abutment elements 7 abut each other directly on one of the plastic profiles 1, 2 and directly on the heating element 10, so that the end face of the abutment element 7 is arranged in alignment with the end face 9 of the end region 8 of the plastic profiles 1, 2 to be welded ,
    With the softening of the plastic and by the pressing of the plastic profiles 1, 2 to the heating elements 10 in the end regions 8 weld beads 23 are formed. After the contact elements 7 rest against the outer surface of the plastic profiles 1, 2 gap-free, these weld beads 23 can identify only in the ent opposite direction. So they are in the hollow chamber (s) of the
    Plastic profiles 1, 2 displaced.
    Once the end portions 8 of the plastic profiles 1, 2 are sufficiently softened, they are removed with the clamping devices 3 opposite to the direction of the arrows 22 of heating element 10, the latter removed from the space between the end portions 8 of the plastic profiles 1, 2 and then the two plastic profiles. 1 , 2 with the tensioning devices 3 again according to the arrows 22 moves towards each other until they rest against each other at the end faces 9, as shown in Fig. 4. In this case, the two contact elements 7 are gapless anei nander. This process step is shown in FIG. 4. This position is held until the two plastic profiles 1, 2 connected to each other (are welded).
    After the weld has formed and become colder, the ent with the interconnected plastic profiles from the jig 3 are removed.
    For easier derivation of the welding bead 23 forming plastic material, the first clamping element 4 may be provided with a slope, as shown in FIGS. 1 to 4.
    As stated above, it can be provided according to a preferred embodiment variant that the contact elements 7 are each pressed against the heating element 10 by the spring element 14.
    It can further be provided that the contact elements 7 are each pressed with at least one resilient element 17 against each one of the two plastic profiles 1, 2.
    The embodiments show or describe possible Ausführungsvarian th, with combinations of the individual embodiments are also possible untereinan.
    For the sake of order, it should finally be pointed out that for the better
    Understanding the structure of the clamping device 3 and the welding device 11 they were not necessarily shown to scale.
    REFERENCE SIGNS LIST 1 plastic profile 2 plastic profile 3 clamping device 4 clamping element 5 clamping element 6 distance 7 contact element 8 end portion 9 end face 10 heating element 11 welding device 12 support member 13 recess 14 spring element 15 screw 16 recess 17 element 18 cavity 19 projection 20 total height 21 slope 22 arrow 23 Schweißwulst
    权利要求:
    Claims (9)
    [1]
    claims
    1. clamping device (3) comprising a first clamping element (4) and at a distance (6) arranged second clamping element (5), between which a plastic profile (1 or 2) can be clamped, characterized in that between the first Clamping element (4) and the second clamping element (5) is arranged in a first direction adjustable contact element (7) or that the second clamping element (5) comprises the adjustable in a first direction contact element (7).
    [2]
    2. Clamping device (3) according to claim 1, characterized in that the adjustable contact element (7) has a spring element (14).
    [3]
    3. Clamping device (3) according to claim 1 or 2, characterized in that the contact element (7) and / or the second clamping element (5) at least one resilient element (17).
    [4]
    4. Clamping device (3) according to one of claims 1 to 3, characterized in that the abutment element (7) has a projection (19) with a comparison with an overall height (20) of the contact element (7) has lower height.
    [5]
    5. Clamping device (3) according to one of claims 1 to 3, characterized in that the abutment element (7) consists at least partially of a polymer which is selected from a group consisting of PA, PTFE, PEEK, polymeric plastics based on PPA.
    [6]
    6. welding device (11) for welding two plastic profiles (1, 2) comprising a heating element (10), in particular a welding mirror, and at least one clamping device (3) for clamping at least one of the two plastic profiles (1, 2), characterized in that the tensioning device (3) is designed according to one of the preceding claims.
    [7]
    7. A method for welding two plastic profiles (1, 2) with each other, after the two plastic profiles (1, 2) are held in a respective clamping device (3), to be welded end portions (8) of the two plastic profiles (1, 2) a heating element (10) are heated and then the two plastic profiles (1, 2) with the heated end regions (8) against each other ge pressed, characterized in that during the heating of the end regions to be welded (8) contact elements (7) of the clamping devices ( 3) against the heating element (10) are pressed, wherein the abutment elements (7) respectively directly to one of the plastic profiles (1, 2) and directly to the heating element (10) are arranged adjacent, so that an end face of the contact element (7) with a End face (9) of the end region to be welded (8) of the plastic profiles (1, 2) is arranged in alignment.
    [8]
    8. The method according to claim 7, characterized in that the contact elements (7) each with a spring element (14) against the heating element (10) are pressed.
    [9]
    9. The method according to claim 7 or 8, characterized in that the abutment elements (7) in each case with at least one resilient element (17) against each one of the two plastic profiles (1, 2) are pressed.
    类似技术:
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    同族专利:
    公开号 | 公开日
    AT520667B1|2019-09-15|
    EP3486073A1|2019-05-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE7127829U|1972-12-21|Hoechst Ag|Device for welding plastic profiles|
    JPH01285328A|1988-05-13|1989-11-16|Hitachi Ltd|Apparatus for method for automatically welding door packing for refrigerator|
    DE4131442A1|1991-09-21|1993-03-25|Bruegmann Frisoplast Gmbh|High strength hot plate pressure butt welding of plastics profiles - by pinching molten flash after welding with blunt blades and forming upset material back on either side of the weld|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50959/2017A|AT520667B1|2017-11-16|2017-11-16|jig|ATA50959/2017A| AT520667B1|2017-11-16|2017-11-16|jig|
    EP18205341.3A| EP3486073A1|2017-11-16|2018-11-09|Clamping device|
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