DE2234902A1 - METHOD AND DEVICE FOR EDGE PROCESSING AND COATING ON PANEL-SHAPED WORKPIECES - Google Patents

Description

PATENT LAWYERS

dr. ing. H. NEGENDaNK · dipping. H. HAlJCK · βιρι, .- phys. W. SCHMITZ dipping. E. GKAAEFS ■ dipping. W. WEHNERT

HAMBURG-MUNICH 2234902

ZUSTELITJN6SA] SSCHHIFT: HAMBTJRG 36 NICE WALL 41

TEL ·. 30 74 SS TTND 38 41 13

TEiEQH. IfEGEDAPATENT IIAMBUHG

Böttcher & Gessner Munich is · mozartsth. 23

TEL ·. P. 38 03 88

fiOOO üaniPUrg -? U telegh. nügedapaie »t Munich

Gasstrasse 18 ■ " _{.. Nr7o}

Hamburg, July 14, 1972

Method and device for edge processing and coating on plate-shaped workpieces

The invention relates to a method for edge processing and coating on plate-shaped workpieces with at least one straight edge, the surface has a coating in which after a machining of the straight edge this with a Coating is glued.

In the previously known method for edge processing and coating on plate-shaped workpieces is normally carried out in such a way that after the machining of the edges and the glue dispensing separate veneer or plastic strips are pulled onto the edges. A However, such a method has a number of disadvantages. So are after the flow of different Dimensions between the glued-on strips and the panel thickness and because of the protrusion of the strips the front and rear edges require additional processing steps such as cutting, flush cutting, bevelling, etc. The

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individual operations can be arranged one after the other Individual machines or machine combinations can be carried out. In any case, however, the feed rate, in particular with regard to the cutting of the protruding strips on the front and rear edges, limits set. The speed possible here is far below the speed required for gluing Operations including the trimming of plate-shaped workpieces can go on. Become relatively thin Plates processed, e.g. as they are used in the radio and television housing industry, must be adapted to the commercially available ones Strip widths for the edges not inconsiderable machining operations are carried out to the strips on the to bring the desired plate thickness. Apart from the manufacturing effort required for this, there is also a bad one Material utilization before.

Another disadvantage is that the coating of the plate edges is not always the same material can be used as for the coating of the plate surface. This leads to color differences between the surface and the plate edge, which are clearly visible in finished parts.

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It is therefore the object of the invention to provide the above Disadvantages to be overcome and a procedure to be specified with edge processing in a simple, material-saving way and coating can be carried out on plate-shaped workpieces.

In the case of a method of the type mentioned at the outset, this The object is achieved in that material is removed from the straight edge of the coated workpiece in such a way that the coating protrudes to a certain extent that glue is then applied to the edge and that Finally, the protruding part of the coating is turned over and pressed against the edge surface.

The inventive method is simple for workpieces or double-sided coating is equally suitable. In contrast to known methods, the invention the edge of the workpiece is coated with the same material as the surface. For this purpose, the material is in known, suitably removed so that the surface coating protrudes by a certain amount, so that the protruding part can be placed against the panel edge by 90 °. If the coating material consists of a elastic material, the protruding part is bent in a suitable manner, so that by means of the previously applied Gluing can take place. In this way

309885/0153

it is always guaranteed that the panel edge and panel surface have the same color. An afterthought Machining, in particular machining, is not required in the method according to the invention »The individual operations, such as straight machining of the edge, applying the glue and turning over the protruding part of the coating, can be carried out at a high Yorachub speed, this achieves a high production rate, because the workpieces can be fed in immediately one after the other, either manually or automatically.

According to one embodiment of the invention it is provided that the material is folded over in the area of the line 5 around the coating until the coating is removed. This proves to be particularly advantageous when it comes to a elastic coating. If, on the other hand, a stiff coating is used that does not move at an angle of Can bend 90 °, such as veneer, laminates, etc., another embodiment of the invention provides that on the outside an elastic film is glued to the coating in the area of the line around which the coating is wrapped, that the material is then removed, at least in the region of this line, down to the film, and that the film is removed after it has been turned over and gluing the overlaying portion of the coating is removed. In this embodiment of the invention In the process, the protruding part of the coating is cut off, however, remains in place through the film strip, so that the protruding part after the glue has been applied thanks to the

Elasticity of the strip can be bent and glued to the edge surface. The film strip is then removed. The use of a film is particularly advantageous if it is self-adhesive.

Another embodiment is that the material is removed so that the overhanging part, the Coating profile formed is complementary to the one on the opposite side of the line around which the coating is formed is turned over, is formed, so that after turning over no cavity is formed. It is conceivable, everything Remove material over an end portion of the coating, so that this alone protrudes by a certain amount, so that the protruding part then upwards by 90 ° or can be bent downwards. However, it must be far less material will be removed by cutting deformation when two complementary profiles are formed that when the protruding part of the coating is folded over, they fit into one another without a gap. In this context the invention also provides that over the protruding part of the coating a solid profile with a trapezoidal, triangular, circular, etc. cross-section is formed and that a correspondingly complementary hollow profile is formed on the opposite side of the line. It proves in any case to be advantageous if in the area of the line around which the protruding part of the coating is folded or bent over, one through the two profiles

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A groove is created in which a bead of glue is inserted can.

Another embodiment of the invention is that the protruding part of the coating has a length which corresponds to the thickness of the plate-shaped part. This is necessary when the rectilinear edge of the plate-shaped workpiece is to be achieved. For a workpiece with double coating, the other coating must be removed by the amount that the first coating is to survive.

In some cases it may be desirable to have the edge coating having a border area on one surface the plate comes to rest. For this purpose, one embodiment of the invention provides that the material is removed in such a way that the protruding part of the coating .um two parallel lines at a distance of 90 ° each can be turned over. The length of the protruding part of the coating must be longer than the thickness the plate. For plate-shaped workpieces with double-sided Surface coating is also used in this context proposed that the length of the protruding part of a coating and the other coating so far removed so that after the two folds the end of the protruding part against the edge of the other

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stratification bumps. This is a so-called doubling obtained on a surface of the plate-shaped workpiece.

Any known glue can be used to glue the panel edge. In a "preferred embodiment the invention is also provided that as Glue Hot melt glue or other quick-stick glue can be applied before folding down the protruding part of the coating. If the coating consists of thermoplastic material, the invention also provides in this context that first cold glue and then melt glue is applied. The iatleim inserted first has the task of radiating heat to insulate the hot melt adhesive, so that "no deformation of the coating film occurs after the Folding or folding the protruding part of the coating to create unclean surfaces and wrinkles leads. The further task of the cold glue is to ensure that it is flawless after folding and pressing Adhesion of the coating to ensure. The hot melt adhesive serves for fast adhesion of the middle layers of all coated panels and the edge to be closed.

iÖS885 / 0153

As already indicated, the Ve: ..- facrsn for all plate-shaped materials with one-sided or double-sided coating in Yorteiler ■ isia3 -be used »as long as it has a straight edge. With old panels, two parallel straight edges can be used to edit and simulate the rectilinear Carry out the edges on the same side. You can do this at sicii known devices are used. The invention suggests in this connection for the implementation of the method that an edge cutting device is provided with which material is removed from the straight edge of the coated workpiece in such a way that that the coating protrudes by a certain amount, that furthermore its attached glue device is provided, in which glue is applied in the recessed area, and a subsequent deformation s device is provided, which folds over the protruding part of the coating and against the edge surface anprdXl ·. Is of course possible to the individual Move! steps with the help of separate machines perform. However, one embodiment of the invention provides that the cutting device, the gluing device and the deformation device are arranged one behind the other in the running direction of the workpiece and one Have common feed device. With the help of such a device, the workpiece can be measured with a constant '

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relatively high speed one after the other be subjected to the individual required operations.

In a further embodiment of the invention it is provided that the gluing device has a glue nozzle, with which a bead of glue can be discharged. In this Connection is also provided that a second glue nozzle is provided, which is arranged in the running direction in front of the first glue nozzle and by means of a cold glue bead can be discharged while a melt adhesive bead is discharged by means of the first glue nozzle.

The turning over or. Folding the protruding part of the coating can be done in any suitable manner. A preferred embodiment of the invention provides for this before that the Yerformvorrichtung several in the direction of travel has cylindrical rollers arranged one behind the other, the axes of which are consecutively of one opposite the horizontal 'slightly rising position to a more or less vertical position. The imaginary connecting line between the contact points of the edge of the plate-shaped workpiece on the cylindrical rollers forms on this Make a curve along which the protruding part progresses is folded over and pressed against the edge surface. When flipping it twice, for example with the so-called If doubled up, additional cylindrical rollers must be provided

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by means of which the second folding is carried out. Between the two groups of. At least one additional LeiMöüse is arranged on cylindrical rollers

Instead of cylindrical rollers, a continuous, appropriately designed, curved surface can also be used,

For proper pressing of the glue joint and for recalibrating the upper, lower and lateral edge, the invention finally provides that the deforming device is followed by a pressing device which has alternating horizontal and vertical pressure rollers, the width or spacing of which Thickness of the workpiece corresponds to «,

The invention is to be elucidated in more detail below with reference to drawings »

Fig. 1 shows a preparation for carrying out the method according to the invention.

Fig. 2 to 7 show different gluing profiles.

Fig · θ shows the gluing of an inelastic material.

Fig. 9 shows the application of the glue.

In Figures 2 to 9 is centered in section

e.g. chipboard
a plate 21 / shown, which is coated on both sides with a film 22, for example made of elastic thermoplastic material (Fig. 2 Ms 7 land 9) or an inelastic veneer (Fig. S). The edge of the plate shown is machined by machining so that a part 30 of a film 22 protrudes by a certain amount. Measure in Figures 2 to 6 and 8. 9 ', the length of the protruding part 30 corresponds to the thickness of the plate 21 including the foils 22. As can be seen from the figures, complementary profiles were formed by the cutting edge deformation, which are formed when the over-

standing part 30 of the film 22 tightly together. For this purpose, material is placed over the protruding Leave part 30 to form a full profile. This has the shape of a flat in section in FIG. 2 Trapezoid, in Figures 3, 8 and 9 the shape of an isosceles triangle resting on its base, in FIGS. 4 and 5 likewise the shape of a triangle and in FIG. 6 the shape of a segment of a circle. In accordance with these profiles, the plate 21 has a correspondingly designed complementary recess. the free edge of the protruding part'30 of the lower film When folded by 90 ° upwards, 22 closes flush with the facing edge of the upper film at 28. The folding takes place around one lying in the plane of the film 22

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Line indicated by 23. The top of the isosceles The triangle in the solid profiles 27 der.Figuren 3, 8 and 9 is somewhat flattened at 31.

In Fig. 7 a somewhat modified embodiment is shown, in which the length of a protruding part 32 of the lower part Foil 22 is longer than the thickness of the plate 21 including the foils 22. The profiles formed here are shaped so that that after they fold twice around the line 23 and a line 29 running parallel at a distance from it again fit into one another without leaving a substantial cavity. The one located to the right of line 23 in FIG Section of the protruding part 32 of the film 22 comes while lying in the plane of the upper film 22, with then the free edges butt against each other. A so-called doubling is obtained in this way.

In Fig. 8 the foils 22 are intended to be seen from a non-elastic Made of veneer. It is therefore not possible to remove the protruding Part 30 to turn around 90 ° without tearing or similar phenomena occur in the area of line 23. Therefore, a self-adhesive film strip 24 is required beforehand glued under in this area. During the subsequent machining, the lower film 22 is also severed at the line 23. The elastic film 24 now enables the protruding part 30 with the full profile to be folded or folded over 27 for coating the right edge in FIG. 8. How one

recognizes from the other figures, the machining takes place except for the upper side of the film below. Of course there is also the possibility of partially cutting the lower film in the area of the line 23 in order to fold or bend or To make relocating easier.

As can also be seen from FIGS. 2 to 9, the metal-removing deformation of the edge of the plate is carried out in such a way that that an upwardly open groove is formed above the bending line 23 or 29. In this groove, as can be seen from Fig. 9, the glue introduced in the form of a bead. In Fig. 9 two superimposed ^ egg caterpillars 25 and 26 can be seen, wherein the lower bead of glue 25 consists of cold glue and the one above it consists of hot-melt adhesive. The cold glue first inserted into the folding groove has the task of dampening the heat radiation of the hot melt adhesive 26 in the case of thermoplastic films, so that none Deformation of the foils 22 occurs, which leads to unclean surfaces and wrinkles after the folding process. The other The task of the cold glue is to ensure proper adhesion of the foils 22 after the folding and pressing process. The hot-melt adhesive 26 is used for rapid adhesion of the middle layers of all coated panels.

The device shown in Fig. 1 consists of a cutting section 40, two gluing sections 41, 43, two

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mold sections 42, 44 and a pressing and sizing section 45 together «The sections 40 to 45 are arranged on a foundation 46. The individual sections 40 to 45, which are arranged one behind the other in the running direction of a workpiece, not shown, are via a Transport chain 47 connected to one another. The upper edge of the chain plane is indicated by reference sign 1. The chain 47 is deflected at both ends via chain wheels 48, 49 above the upper run of the chain 47 overprints 2 are provided in the form of revolving V-belts, which in the lower horizontal Vorshubrichtung are resiliently guided. They ensure that the workpieces are properly clamped during processing. The V-belts 2 are deflected at the ends via rollers 50, 51. One of the wheels 48 and at least one of the rollers 50, 51 can with the aid of a suitable drive device be driven.

In the device of FIG. 1, only the parts for machining a straight edge of a workpiece shown. The parts required to machine the opposite edge at the same time are in this one View not to be seen. The cutting section 40 has a first working shaft 3, which is cut by sawing and cutting the workpieces are trimmed to the set width. With the help of downstream working

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shafts 4, 5 and 6, profiles are produced as shown in FIGS. 2 to 7. Je nacla dem Required profile can also, "other jobs be provided. The working shafts 3 Us 6 are with the help unmarked "iorrichteigen according to height and side adjustable. In the one-of-a-kind machining areas of the Zerspanungsabschnitts 40 are brake rollers 7 and slide tables 9 provided, which press the workpieces onto support rollers 8 arranged underneath Device is a control panel 52, which over a boom 53 on a fixed part of the device is appropriate. .

In the running direction behind the last working shaft 6 there is a so-called air lock 10 with a built-in one rotating brush 54. The job of this airlock 10 consists in cleaning the profile cross-sections of machining residues. The airlock 10 is a first glue nozzle 11 nachgeordneir, by means of which one Cold glue bead 25 into the one provided in the area of line 23 Groove is inserted (Fig. 9). A further glue nozzle 12 is arranged behind it, by means of which the melt glue bead 26 is inserted. Both glue nozzles 11, 12 are both in terms of their location and in terms of the delivery amount controllable.

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ÖftfölNAL 1NSPICH &

The task of verf ο rmat »section 42 is to remove the protruding Part 30 of the coating film to fold over the line 23 and insert the solid profile 27 into the hollow profile. For this purpose, cylindrical rollers 16 are provided, which are mounted on a slide that can be adjusted perpendicular to the direction of advance 15 are arranged. With the help of these rollers 16, the axis of which is inclined slightly obliquely to the horizontal Position (in the direction of travel first roll) changes up to a vertical position (in direction of travel last roll), the protruding part 30 is gradually turned over from the horizontal to the vertical position. The roles 16 provide also that an adequate compression of the profiles is generated.

The device shown in Fig. 1 is able to a Produce and process profile, as shown in Fig.7. Therefore, the rollers 16 take the first Folding before. Then, with the help of two further glue nozzles 19, another application of glue takes place along the Line 29 in FIG. 7. The glue nozzles 19 are also controllable and exist in the same way Me the glue nozzles 11, 12 also from a cold glue and a hot melt glue nozzle. This is followed by a further * · deformation section 44, which also has cylindrical rollers 20, which just as in the deformation section 42 a slide which can be adjusted perpendicular to the feed direction is arranged. In the deformation section 44 have the

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However, rollers 20 a greater distance from each other than the rollers 16 in the deformation section 42. Der larger roller spacing is required due to the now stiffer profile, so here too over the area the elastic deformation a curve is obtained with which the desired folding can be made can.

In the subsequent calibration and pressing section, pressure roller pairs 18 are provided at equal intervals, which are arranged on a slide 17 movable perpendicular to the feed direction. The axes of the pressure roller pairs 18 run alternately horizontally and vertically and are used for perfect pressing the glue line and for recalibrating the top, bottom and side edges.

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Claims (17)

Patent claims : J 1.) A method for edge processing and coating on plate-shaped workpieces with at least one straight edge, the surface of which has a coating in which, after machining the straight edge, this is glued with a coating, characterized in that the straight edge of the coated workpiece material is removed in such a way that the coating protrudes by a certain amount, that glue is then applied to the edge and that finally the protruding part of the coating is turned over and pressed against the edge surface. 2. The method according to claim 1, characterized in that that the material is in the area of the line around which the coating is turned over until the coating is removed. 3. The method according to claim 1 for plate-shaped workpieces with non-elastic coating, characterized in that on the outside of the coating in the area of the line around which the coating is wrapped, an elastic film is glued on, that then the material is removed at least in the area of this line down to the film, and that the film is removed the folding and gluing of the protruding part of the coating is removed. 309885/0153 - 19 - 4. The method according to claim 3 »characterized in that a self-adhesive film is used as the film. 5. The method according to any one of claims 1 to 4, characterized that the material is removed so that that formed over the protruding portion of the coating Profile is complementary to that on the opposite side of the line around which the coating is folded is formed, so that no undesired cavity arises after folding down. 6. The method according to any one of claims 2 to 4 and 5, characterized in that a solid profile with a trapezoidal, triangular, circular, etc. cross-section is formed over the protruding part of the coating, and that on the opposite side of the line a correspondingly complementary hollow profile is formed. 7. The method according to any one of claims 1 to 6, characterized in that that the protruding part of the coating has a length that is the thickness of the plate-shaped Workpiece corresponds. 8. The method according to any one of claims 1 to 6, characterized in that that the material is removed so that the protruding part of the coating by two parallel in Distance from one another running lines can be turned over by 90 °. - 20 3G9885 / 01S3 9. The method according to claim 8 for plate-shaped workpieces with surface coating on both sides, characterized in that the length of the protruding part of a coating so chosen and the other coating is removed so far that after the two folds the end of the protruding part butts against the edge of the other coating. 10. The method according to any one of claims 1 to 9, characterized in, that as glue hot melt glue or other quick-release glue before folding over the protruding part of the Coating applied wM. 11. The method according to claim 10, characterized in that in the case of thermoplastic coating material first cold glue and then melt glue is applied. 12. Device for performing the method according to a of claims 1 to 11, characterized in that an edge cutting device (40) is provided with the at the straight edge of the coated workpiece (21) material is removed so that the coating (22) survives by a certain amount that also a downstream Laying device is provided in which glue is introduced into the recessed area, and that a downstream deformation device (42, 44) is provided, which the protruding part (30) of the coating (22) folds over and presses against the edge surface. a U Is O ö 3 i U Κι J <- · 13. The device according to claim 12, characterized in that that die'Zerspanvorrichtung (40) the gluing device (41, 43) and the deformation device (42, 44) in the running direction of the workpiece are arranged one behind the other and have a common feed device. 14. Apparatus according to claim 12 or 13 »characterized in that that the gluing device (41, 43) has a glue nozzle (11, 12, 19) by means of which a glue bead (25, 26) can be applied. 15. Device according to claim 14, characterized in that a second glue nozzle (11) is provided which is ■ direction is arranged in front of the first glue nozzle (12) and by means of which a cold glue bead is discharged while a bead of hot melt adhesive is discharged by means of the first glue nozzle (12). 16. Device according to one of claims 12 to 15, characterized characterized in that the deformation device has several cylindrical ones arranged one behind the other in the running direction Has rollers (16, 20), the axes of which follow one another from a position that rises slightly relative to the horizontal position move to an approximately vertical position. - 22 - 309885/0153 17. Device according to one of claims 12 to 16, characterized characterized in that the deforming device (44) is followed by a calibrating and pressing device (45), which has pressure rollers (18) arranged alternately horizontally and vertically, the spacing of which corresponds to the width or corresponds to the thickness of the workpiece. 309885 / 01S3 Blank