DE2845651A1 - Hollow plastic cladding panel - has render coating sprayed by elliptically moving nozzle onto adhesive base on roughened surface - Google Patents

Abstract

The cladding unit is used esp. for renovating external wall faces of old buildings, or hiding subsequently applied insulation, cladding panels and comprises a pref. extruded hollow plastic profile coated with rendering. The surface (12) of the panel (11) is first roughened or ground, for complete removal of sliding media used in extrusion. An adhesion base is evenly applied to the surface and dried. Rendering material is then sprayed on in a continuous process, by elliptical movement of a nozzle, corresponding to panel width, along the length of the panel.

Description

Description The present invention relates to a method and means for coating a cladding panel from a preferably extruded plastic hollow profile with a plaster, according to the preamble of the claim 1 buw. that of claim 11.

Cladding panels made of plastic are preferred in the renovation of old buildings used, namely to renew the facade or to make the on invisible Thermal and / or sound insulation subsequently applied to the facade. Such Cladding panels are supplied in lengths of 6 m, for example, and accordingly on the building site tailored. The cladding panels of the type referred to here are in the form of a Hollow profile produced by means of an extruder, the hollow profile through intermediate webs is divided into several smaller cavities, so that the panels despite being relatively thinner Walls have sufficient inherent rigidity both in the longitudinal and in the transverse direction own.

Such cladding panels are inexpensive to manufacture and to assemble, but they give the renovated building a different look, which no longer necessarily fits into the picture of the settlement concerned or the like. There the old buildings in question are almost all plastered as a rule there is a need to do so with one with such cladding panels clad building facade to do.

Plastering the plastic panels is not so easy possible because the plaster does not adhere to the plastic profile.

The object of the present invention is therefore to provide a method and a device for coating a cladding panel the end To create plastic of the type described above with a plaster.

With regard to the procedure, this task is carried out by those in the identifier of claim 1 and with regard to the device by the characterizing part of the claim 11 specified features solved.

With the measures according to the invention, it has been possible for the first time to achieve a Cladding panel made of an extruded plastic hollow profile with a spray plaster to provide permanent, which shows a uniform surface without affecting the structure of the hollow profile shows through in shades or other nuances of the spray plaster. The surface of the panel to be treated or coated is therefore initially freed from the lubricant that occurs during the extrusion of the plastic to the relevant Hollow profile is used. This is done by roughening or

Sanding of the surface, but it must be taken into account that this surface is not exactly level as with a board and under the with Sanding occurring pressure also remains level, but that the surface between the webs of the hollow profile, i.e. between the air bearings of the one to be coated Surface bidlenden top wall is elastically resilient. Thus, with the invention Solution solved the problem of sanding a wavy line-like surface in such a way that that the lubricant disappears evenly and completely over the entire surface. Only then can it be ensured, as is the case with the invention, that the primer can be applied evenly. There is the primer designed so that the spray plaster used adheres well after it has dried, whichever is extremely elastic in order to be able to cope with the facade exposed to considerable temperature differences not to tear. The created device according to the invention is very simple and allows a continuous flow through the individual processing and coating stations. The cladding panels plastered in this way can, as before, in a simple manner Way attached so that a facade can be created which is essentially the same as the original plastered facade.

In addition, such a plastered facade can easily through Overpainting can be renovated, while this is done with an unsightly plastic surface not possible.

Further details and embodiments of the invention are as follows Refer to the description in which the invention is based on the illustrated in the drawing Embodiments will be described and explained in more detail. They show: Fig. 1 in schematic representation according to the plan view of a device according to the invention an exemplary embodiment of the present invention, FIG. 2 in a schematic representation a side view along the line II-II of FIG. 1, FIG. 9 is a front view the roughening or grinding device, Fig. 4a, b views of the at the grinding roller the roughening device used grinding wheels, Fig. 5 is a side view of a Spray device for applying the plaster behind a Ausführungsbe ispiel of the present Invention and Fig. 6 is a front view of a spray device for applying the same Plaster according to another embodiment of the present invention.

The device 10 according to the invention according to the two shown Embodiments serves the purpose of the coating process according to the invention in an economical manner a cladding panel 11 made of plastic for the outer facades of, for example.

To carry out old buildings with a plaster, in particular a rough plaster. The panel 11 to be coated is one which is produced practically endlessly in an extruder Hollow profile, the shape of which.

in particular from FIG. 3 results. These panels 11 have an in In the assembled state, visible surface 12 of, for example, about 16 to 17 cm in width and are brought on the market in a length of, for example, about 6 m. These panels 11, the surface 12 of which has a recessed edge 13 on one side, which is shown in FIG in the assembled state is covered by a tab 14 of the adjacent panel, should be coated with a plaster, in particular by spraying on. The hollow profile of the panel 11 is perpendicular to the surface 12 to be coated Web 17 divided into several cavities 16 of different heights. This in cross section An approximately honeycomb-like structure seen gives the panel 11 sufficient inherent rigidity in transverse and longitudinal direction despite the relatively thin design of the walls and Bridges. In addition, the panel 11 has a surface 12 on one side indicative hook strip 18 and on the other side .. one of this surface 12 away-pointing hook strip 18 ', so that, as can be seen from FIG. 6, in assembled State of the panels 11, the two hook strips 18 and 18 'interlock. To the Attaching each panel 11 to the relevant wall or facade are along one Edge slots 19 are provided through which the panel can be attached.

As the schematic representation of FIG. 1 can be seen, are a number of operations are required to the panel 11 with an example. Rough plaster to provide. In a roughening or

Grinding device 21, the panel 11 is treated in such a way that of the surface to be coated 12, the lubricant is removed, which in the extruder manufacture (Extrusion) of the hollow profile is used. There is the difficulty or the Problem, the solution of which is explained in detail below is, in it, the surface 12 of the panel 11, which is inherently flexible under pressure, everywhere edit or grind in such a way that the lubricant over the entire surface is completely removed, at the same time also on the set-back edge 13. This means that conventional brushes cannot be used because of the profile surface 12 and there, as it turned out, brushes wear out too quickly.

In a subsequent spray device 22, the ground or the surface 12 of the panel 11, including the recessed one, freed from the lubricant Edge 13 provided with an adhesive primer. This primer becomes even Applied over the surface of the panel 11 using an adhesive primer which is built up on an aqueous base and set to be highly opaque. Afterward the panel 11 with the primed surface layer 24 is placed on a drying table 26 where the primer is either passively by the ambient air or actively is dried by additional heating elements and / or fans. Then comes that Panel 11 in a spray device 27, in which the plaster is applied by spraying is, so that a provided with a spray plastered surface 28 panel 11 is reached. The spray plaster is a highly bound, highly elastic plastic plaster, a medium based on dispersion, which, depending on the roughness of the plaster, contains quartz or

Sand of a certain grain size, for example 1.5 or 2.5, are attached.

This spray plaster can be applied in different colors and adheres to the primer to which quartz powder is added for this purpose.

The various devices are explained in detail below.

According to FIGS. 1 and 2, the roughening or grinding device 21 is arranged at the end of a feed table 31 with a stop bar 32 and with one that runs parallel to it, but only just before the grinding device 21 beginning guide rail 33 for the panel 11 is provided. The panel 11 engages around with its tab 14 and the hook strip 18 'the rectangular in cross-section Stop bar 32, while the guide rail 33 is approximately U-shaped and the hook strip 18 engages over.

The roughening device 21 has a drive motor 36, which is a Sanding roller 37 and a cleaning brush located behind it in the direction of passage A. drives at about 2700 rpm, for example.

The grinding roller 37 is not only rotating on the device frame, but also held so that it can be pivoted in such a way that it can be moved in the direction of the feed table 31 or is adjustable towards the panel surface 12. These are the bearings of the sanding roller 37 attached to a plate 39, which is the attachment area of the grinding roller 37 facing away from a pivot axis 41 and the grinding roller 37 opposite one on the device frame has rotatably mounted adjusting screw 42. This is the clear distance between Loop whale circumference and feed table 31 adjustable.

The grinding roller 37 consists of a plurality of identical grinding disks 43, one of which is shown in sub-figures 4 and 4b. These are commercially available available grinding wheels 43 are provided with a bore 44 through which the roller axle is pushed through; then the multitude of grinding wheels 43 pressed against one another or with one another in the direction of the axis of rotation by suitable means braced, so that a grinding roller 37 with substantially continuous Grinding surface results. The individual grinding wheels 43 consist of a porous, compliant and non-woven fiber structure, which e.g.

synthetic organic fibers of a certain length and diameter are. These fibers are crimped and resilient and resilient, that is, elastic and randomly connected to one another by means of an adhesive. The grinding disks 43 also contain Abrasive grains, e.g. made of corundum, silicon carbide Or the like. Bonded grains customary in abrasive articles, which are also supported by the said adhesives adhere to the fibers or are bound to them. The abrasive grains are provided both outside and inside the fiber structure. To this In this way, the grinding wheel 43 is elastic enough to make a surface 12 uniform to be able to roughen, which assumes a slightly wavy shape under pressure and has a recessed edge, so it is not completely flat. It is note that the pressure exerted on surface 12 has a certain value does not exceed. The panel surface 12 is made with such a sanding roller 37 roughened over the entire surface so that the lubricant completely disappears. With the sanding roller 37, which in the bus guide example consists of 150 individual Is composed of grinding wheels 43, a significant number of panels, For example, about 6000 to 7000 pieces of 6 m length are roughened, among other things because the grinding roller 37 can be readjusted in a corresponding manner can until worn to a minimum diameter.

Between the roughening device 21 and the spray device 22 is a transport device 46 is provided, which consists of two rotating, endless, caterpillar-like Bands 47 and 48 are made, which are driven in opposite directions in the exemplary embodiment are. The opposing strands of the two bands 47 and 48 form a gap which is approximately smaller than the thickness of the panel 11, so that an incoming Panel 11 is detected and taken. Each panel 11 is therefore initially made by hand pushed into the roughening device 21 until the beginning of the panel from the transport device 46 is detected. The speed of the conveyor belts 47 and 48, of which the upper run of the lower belt 48 is arranged at the level of the feed table 31 is chosen in such a way that, for example, a throughput speed of 7 m / min results. At the exit of the port device 46, a switch is arranged from the beginning of the panel actuated is and remains actuated as long as a panel 11 is guided over it. This Schlater 49 ensures that the spray device is switched on and off, preferably in a delayed manner 22nd

The spray device 22 has a cabin 51 in the side walls Slots 52 are arranged through which the panel 11 enters or exits. At the Ceiling 53 is suspended from a spray nozzle 54 attached, which is via hoses with compressed air and a reservoir for the material for priming is provided.

The panel surface 12 is sprayed with the primer in other words, in the flow, a single stationary nozzle preferably being provided is, with which the entire width of the panel 11 is sprayed. Since the panels 11 always are introduced one behind the other on the feed table 31 without a gap, the relevant Panel 11, the end of which emerges from the transport device 46, from the subsequent one Panel 11 pushed on until it is on the drying table 26 to one side arranged end stop 56 arrives. Once this is done, step on the drying table 26 provided hydraulic elements 57 in action, their perpendicular to the direction of passage A displaceable piston the finished primed panel 11 in the direction of arrow B. Move over the drying table 26. It goes without saying that the hydraulic elements 57 instead of, as shown, arranged above the table also below the table can be and with a gripper element through a slot in the table through the Panel 11 can capture. The panel 11 is one of its width corresponding Moved away further. The drying table 26 is made so wide that the primed panel 11 is only processed further when the adhesive primer is completely dry. This depends on the speed of the panels when roughening and spraying and on the type of drying of the primer. At the Embodiment the primer dries in the ambient air. However, it is it is also possible to apply the primer by means of heating elements arranged above the table 26, - spotlights, - actively drying fans and the like.

At the rear end of the drying table 26 in the displacement direction B the panel 11 pushed onto at least two rollers 58, around the panel 11 afterwards to be able to move in a direction C which is opposite to the feed direction A. Moving the panel 11 in question in direction C can either be done by hand or take place in that at least one roller 58 is driven. From there the primed panels 11 arrive in the direction of arrow C to the spraying device 27

In a preferred embodiment of the present invention is the spray device 27 for plastering the surface 12 according to Figures 1 and 5 trained. The spray device 27 has a support table 61 in the area from the beginning of which a cabin 62 is arranged, in the side walls of which there are slots 63 are provided for moving the panel 11 in and out. There are two in front of the cabin 62 opposing rollers 64 arranged, which are driven and between which the Panel 11 is pulled through. At the other end, that is, at the exit of the cabin 62, where the surface 12 of the panel 11 is completely plastered, there is one underneath Drive roller 66 and at the top a roller 67 are provided, which are also driven and which, however, only rests on the edge 13 of the panel surface 12, since this recessed edge 13, as will be shown later, not with the spray plaster is provided. After it has completely passed through, the panel 11 is removed from the spray table 61 taken and placed in a high storage rack, not shown, to dry. It it goes without saying that a drying oven is also connected to the spray table 61 can.

A motor 69 is attached to the ceiling 68 of the spray booth 62 Shaft 70 is connected to a, for example, disk-shaped holder 71 on which a spray nozzle 72 is attached such that when the shaft 70 rotates relative to this one eccentric movement, i.e. an elliptical path73. This elliptical orbit 73 is provided so that the major axis of the ellipse at least same is the width of the panel surface 12 to be sprayed. As both the speed of the shaft 70 as well as the passage speed, i.e. the drive speed the drive rollers is adjustable, can produce an optimal result in terms of Uniformity of the plaster to be applied can be achieved. The nozzle 72 is over Hoses on the one hand with compressed air and on the other hand with the pump 74 of an intermediate container 75 connected for the spray plaster.

A circumferential flexible belt 76 is provided within the cabin 62, which extends with its lower strand over a length that extends through the nozzle 72 covered or splashed area extends, that is on the recessed area Edge 13 of the surface 12 is elastic, so it is just as wide as this edge 13. The distance between the lower run of the belt 76 and the support surface of the spray table 61 is slightly smaller than the thickness of the panel 11, so that when inserted of the panel 11 into the slot between the belt 76 and the support surface of the spray table 61 the non-driven belt 76 is entrained due to friction. To this Way, the edge 13 is covered by the tape 76 during the injection molding process, so that the edge is not coated with the spray plaster. On in the direction of passage rear area of the belt 76 is a scraper 77 is provided, which on the Volume 76 sprayed plaster brushes off.

This residual plaster from the scraper 77 and the plaster from the nozzle 72 Is sprayed laterally next to the panel 11, falls through an opening 78 in the table 61 in a collecting funnel 79, is collected there and by a pump 80 in a large reservoir 81 returned, in which he is among the stored there plaster to be processed is mixed. From this reservoir 81 is ever Filled as required spray plaster in the intermediate container 75, from which the plaster for Nozzle 72 is promoted.

In another embodiment of the present invention is Spray device 27 'according to FIG. 6 formed. In this embodiment has the spray device 27 'has a wider spray table 86 on which two, such as in the assembled state interlocking panels 11 are placed. So is the edge 13 of one panel is covered by the flap 14 of the adjacent panel; the edge 13 of the adjacent panel is covered by a folding strip 87 runs along the table 86 and is hinged to it. For inserting two panels 11, the folding strip 87 is in the folded-up position shown in dash-dotted lines brought. A rail 88 is arranged above the spray table 86, on which the spray nozzle 89 hangs over feed hoses 90 and either by hand or by means of a suitable not shown device in the prescribed elliptical orbit is, with now the major axis of the ellipse greater than or equal to the width of two Panels is. The movement of the spray nozzle 89 along the two panels 11 can either can also be done by hand or by motor. These plastered panels too are then dried passively or actively. The table 86 also has both sides Plaster collecting channels 91.

- End of description

Claims (41)

Title: Method and device for coating a cladding panel made of plastic claims r1 method for coating a cladding panel from a preferably extruded plastic hollow profile with a plaster, characterized by the following steps: a) The surface to be coated (12) of the panel (11) is roughened or sanded so evenly that the one used in the extrusion Lubricant is completely removed; b) on the ground surface (23) an adhesive primer evenly applied and dried; c) the plaster is covered by a panel (11) corresponding to the width, approximately elliptical rotary movement of a nozzle progressing in the longitudinal direction of the panel sprayed on. 2. The method according to claim 1, characterized in that g e k e n n z e i c hn e t, that after sanding the surface to be coated is cleaned. 3. The method according to claim 1 or 2, characterized in that g e k e n n -z e i c h n e t that sanding and / or priming and / or applying the Spray plaster is carried out in a continuous process. 4. The method according to any one of claims 1 to 3, characterized g e -k e n It should be noted that the priming is carried out by spraying or spraying on. 5. The method according to any one of claims 1, 2 or 4, characterized g e k e It is noted that the spray device (27 ') for applying the plaster is moved over the length of the panel. 6. The method according to any one of the preceding claims, characterized g e I do not know that the grinding is due to the hollow profile structure pressure-yielding surface (12) by means of at least one high-speed surface revolving, resiliently resilient grinding roller (37) at least in the radial direction is made with a fiber structure with adhering abrasive grains. 7. The method according to claim 6, characterized in that g e k e n n z e i c h -n e t that the speed of the grinding roller (37) at about 2700 rpm and the throughput speed is about 7 m / min. 8. The method according to any one of the preceding claims, characterized g e it does not indicate that the primed panels (11) are on a drying table (26), on which they are temporarily stored for drying in a transverse direction will. 9. The method according to claim 8, characterized in that g e k e n n z e i c h -n e t that the panels (11) after drying in compared to the passage of the previous one Treatment of parallel backward movement should be splashed with plaster 10. Procedure according to one of the preceding claims, characterized in that the panels (11) provided with the spray plaster are dried in an elevated fork bearing will. 11. Device for coating a cladding panel from a preferably extruded plastic hollow profile, the surface of which is due to the hollow profile structure and thinner walls is resilient under pressure, with a plaster, g e -k e n n z e i c h n e t by a) a roughening or grinding device (21) with at least one rotating grinding roller (37), the grinding body of which is one in the longitudinal and one in the circumferential direction has continuous grinding surface and is at least radially resilient and resilient is compliant, b) a spray device (22) for evenly applying a Adhesive primer on the surface to be coated (12), c) a drying device (26) d) a spray device (27, 27 ') for evenly applying a plaster certain grain size, with at least one spray nozzle (72, 89), which during the Injection process preferably a substantially elliptical path (73) across at least the width of a panel (11), the panel (11) at least for passage through the grinding and spraying device (21; 22) is driven. 12. Device according to claim 11, characterized in that g e k e n n z e i c h -n e t that the grinding body (37) of the grinding device (21) consists of a plurality of several commercially available grinding wheels clamped together to form a roller (43), which is a porous, resilient, non-woven fiber structure with crimped resilient and resilient fibers that adhere to one another, on which abrasive grains adhere, own. 13. Device according to claim 11 or 12, characterized in that g e k e n n -z e i c h n e t that the sanding roller (37) to the panel surface to be processed (12) is adjustable. 14. A device according to claim 13, characterized in that it k e n n z e i c h -n e t that the grinding roller (37) is rotatably mounted in a pivoted bearing is. 15. Device according to one of claims 11 to 14, characterized g e k It is noted that the grinding device (21) has a single grinding roller (37) and a subsequent cleaning brush (38). 16. Device according to one of claims 11 to 15, characterized g e k It is noted that the grinding roller (37) is driven at about 2700 rpm is. 17. Device according to one of claims 11 to 16, characterized g e k It is noted that the grinding device (21) is on a feed table (31) is arranged with a longitudinal stop bar (32) and a guide rail (33) parallel thereto for the panel (11) is provided. 18. Device according to claim 11, characterized in that g e k e n n -z e i c h n e t that between the grinding device (21) and the spray device (22) a Transport device (46) is arranged. 19. Device according to claim 18, characterized in that g e k e n n -z e i c h n e t that the transport device (46) consists of two elongated, caterpillar-like, endlessly revolving belts (47, 48), of which at least one is driven and between which the panel is pulled through. 20. Device according to claim 18 or 19, characterized in that g e k e n n -z e i c h n e t that the transport device (46) is driven such that the Panel (11) is granted a throughput speed of about 7 m / min. 21. Set up after. one of claims 18 to 20, characterized g e k It is noted that between the transport device (46) and the spray device (22) a spray device actuating switch (49) is provided, which from continuous panel (11) can be actuated. 22. Device according to claim 11, characterized in that g e k e n n -z e i c h n e t that the spray device (22) has a cabin (51), on the sides of which slots (52) are provided for feeding and removing the panel (11) and on the ceiling (53) a spray nozzle (54) is suspended. 23. Device according to claim 22, characterized in that g e k e n n -z e i c h n e t that the primer is a water-based, highly opaque paint is. 24. Device according to claim 22 or 23, characterized in that g e k e n n -z e i c h n e t that the adhesive primer quartz powder to hold or adhere the spray plaster is mixed in. 25. Device according to claim 11, characterized in that g e k e n n -z e i c h n e t that the drying device has a table (26) in the form of a continuous bearing has on which the panels (11) provided with the primer in one direction are displaceable perpendicular to the direction of passage during the surface treatment. 26. Device according to claim 25, characterized in that g e k e n n -z e i c h n e t that the table (26) with at least one preferably hydraulic displacement device (57) is provided. 27. A device according to claim 25 or 26, characterized in that it is e k e n n z e i c h n e t that above the table (26) heat radiators or the like. Active drying elements are arranged. 28. Device according to claim 11, characterized in that it is n -z e i c h n e t that the spray plaster is a highly bound, highly elastic plastic plaster, which is mixed with quartz of a certain grain size. 29. Device according to claim 11, characterized in that g e k e n n -e 1i c h n e t that the spray device (27 ') has a support table (86) for the panels (11) has, over which the spray nozzle (89) can be moved back and forth. 30. Device according to claim 11, characterized in that g e k e n n -z ei c h n e t that the spray device (27) has a support table (61) for the panels (11) has, on which a spray booth (62) is arranged, through which the panel (11) is passed through. 31. Device according to claim 29 or 30, characterized in that it is -k e n n z e i c h n e t that the support table (61) is at the end of the flow storage table (26) connects, the panels (11) being movable in a direction that the Feed direction in the grinding device (21) is opposite 32. Establishment according to claim 31, characterized in that the spray device (27) is provided with drive elements (64, 66) for the panels (41) on both sides the spray booth (62) are arranged. 33. Device according to claim 11, characterized in that there is no sign of it e t that the spray nozzle (72) is attached to an eccentrically mounted holder (71) is. 34. Device according to claim 32 or 33, characterized in that it is g e -k e n n z e'i c h n e t that the throughput speed of the panels (11) and / or the speed of rotation the spray nozzle (72) is adjustable. 35. Device for a cladding panel with a recessed one Edge of the panels that are next to each other in the assembled state from an edge strip of the adjacent panel is covered, according to one of the preceding claims, characterized in that the spray device (27, 27 ') with a the edge (13) covering element (76, 87) is provided. 36. Device according to claim 35, characterized in that it is n -z e i c h n e t that the element is a folding strip (87). 37. Device according to claim 35, characterized in that it is n -z e i c h n e t that the element is one with the pass of the panel (11) passive circumferential belt (76) is. 38. A device according to claim 37, characterized in that it is e k e n n -z e i c h'n e t that a plaster scraper (77) is provided at one point on the belt (76) is. 39. Device according to one of claims 35 to 38, characterized g e k It is noted that in the area of the spray booth (62) the support table (61) has an opening (78) under which a collecting funnel (79) is arranged. 40. Device according to one of claims 35 to 39, characterized g e k Note that this is behind the spray booth in the direction of flow (62) arranged drive element has a roller (67) which the edge (12) of the panel (11) recorded. 41. Device according to one of the preceding claims, characterized in that g It is not noted that a storage container (81) is provided for the spray plaster is, into which the remaining plaster is pumped from the collecting funnel (79) and with a Intermediate container (75) is connected, from which the spray plaster to the spray nozzle (72) is pumped. - End of claims -