DE10106341B4 - Plastic foam sheets of large thickness - Google Patents

Abstract

A process for the production of HCFC-free extruded plastic foam boards with a minimum thickness of 70 mm, in particular of polystyrene foam boards, wherein at least two starting plates are joined together to form a thick plate, wherein prior to bonding to all connecting surfaces in a first step, the extrusion skin on the starting plates is removed, so that in the following connecting steps only extrusion skin-less plate surfaces are connected to each other and that on the connection surface thereby a sufficient diffusion is generated, that for the connection with all-over connection a diffusion-open adhesive is used, wherein optionally additionally a mechanical connection by means of fasteners.

Description

The invention relates to an extruded plastic foam sheet of large thickness. New energy-saving regulations demand from the client always better thermal insulation. Due to the limited availability of non-renewable energy sources (coal, gas, oil) all consumers are required to save energy. This can be done to a great extent by better house insulation. Against the background, in the past, plastic foam boards having a thickness of more than 100 mm, even with a thickness of 200 mm and more have been produced. This is readily possible with the HCFC-containing blowing agents for extruder foam boards. However, the propellants containing HCFC are being replaced by alternative propellants because of their damaging effect on the ozone layer. With the use of alternative blowing agents, considerable difficulties have arisen in the production of these plastic foam sheets. From a thickness of 60/70 mm, these difficulties increase greatly. In addition, the insulating properties deteriorate with the use of most alternative blowing agents when extruding insulation boards (XPS). The insulating property of XPS depends very much on the cell structure of the foam. This is also determined by the ratio of insulation thickness to nozzle gap. At the same time, a necessary melt pressure must be built up in front of the nozzle gap by narrowing the nozzle gap. This forces compliance with certain nozzle gap limits. That is, the nozzle gap can not be opened arbitrarily wide, since with its help, the pressure is generated in the nozzle, which is ensured by the fact that the blowing agent does not already in the nozzle for foaming the melt. With increasing plate thickness, this results in an increase in the ratio of insulation thickness to nozzle gap. The larger this ratio becomes, the worse the cell structure becomes, and the more difficult it is to produce a foam having good insulating properties.

In the past is with the DE 44 21 016 A1 has been proposed to overcome the above-mentioned difficulties by producing plates with safely attainable thickness and doubling of the plates. A thermal connection between the plates was provided. An editing of the plates on the contact surfaces was not provided. However, this proposal has not been implemented because when welding two plates to the weld, a barrier against water vapor diffusion is created and must be retained for most applications of the XPS as a thermal insulation in construction. The barrier layer is formed by the extrusion skins at the contact surfaces of the plates and the additional skirts resulting from the thermal connection. It is also known to glue extruded sheets together. There is also a barrier between the interconnected plates. The barrier layer again consists of the extrusion skins, in addition of the adhesive layer.

It is an object of the present invention to produce XPS panels of sufficient product quality. The object is achieved by the features of claim 1. In this case, the invention of the unrecorded technique of doubling turns. This is based on the knowledge that the previous negative experiences are due to the barrier layer between the interconnected plates.

Although the multilayer compound of foam from the DE 35 41 053 A1 known. There, however, no removal of the extrusion skin is provided. In addition, a weld is provided, which leads after removal of the extrusion skin to a weld layer with similar effect as the extrusion skin. A partial gluing is from the DE 689 11 643 T2 known for the production of garments. There is no indication for use on multilayer polystyrene foam boards.

From the JP H06-218 860 A is also the bonding of plate-shaped insulating material to a thick plate known. However, the starting plates are freed only on one side of the extrusion skin.

• d) an den Berührungsflächen und den gegenüberliegenden Flächen oder
• e) einseitig an den Berührungsflächen und durch zusätzliche Maßnahmen, welche die sich ergebende Plattenkrümmung verhindern oder kompensieren.

It is advantageous in the production according to the invention completely flat contact surfaces of the plates to be joined. For this purpose, either a processing of the output plates

• d) at the contact surfaces and the opposite surfaces or
• e) one-sided to the contact surfaces and by additional measures which prevent or compensate for the resulting plate curvature.

• a) extrudierte Ausgangsplatten verwendet werden, die spätestens unmittelbar vor der Verbindung an der Berührungsfläche durch Bearbeitung von der Extrusionshaut befreit werden und
• b) eine Klebung mit einem diffusionsoffenen Kleber erfolgt.

According to the invention better XPS plates are achieved with the features of the main claim and in advantageous embodiments with the features of the subclaims. It is essential that

• a) extruded starting plates are used, which are released from the extrusion skin at the latest immediately before the connection at the contact surface and
• b) bonding with a diffusion-open adhesive takes place.

Producing a flat surface before joining the plates prevents on the Junction cavities or channels arise, can penetrate into the water. The water would minimize the insulating properties of the insulating material. When uniform machining is performed on both opposite surfaces of the output plates, plate curvature is prevented. The plate curvature can also be compensated by heat treatment of the unprocessed, opposing surface with only one-sided processing of the output plates. It is also conceivable to connect the output plates with sufficient pressure, which eliminates a curvature. After connection, the one-sided processed starting plates keep each other in the desired planar shape, in particular at the same thickness.

A plate curvature can also be prevented by two extruded foam strands are surface-treated on one side on the contact surfaces in the sense of the invention and then, preferably immediately connected to each other. Due to their length, the foam strands are easily attached to each other and a smooth course of the strands can be maintained. After their inventive compound, the foam strands are cut to the desired plates.

Depending on the quality of the output plates, the surface finish removes 1 to 10 mm of the plate thickness.

For example, cutting can be done by milling, planing, cutting or sawing.

The diffusion-open adhesive should reduce the diffusibility of the plate no more than 50%, preferably not more than 20%. Even more preferably, an adhesive is used that does not affect the diffusibility of the plate at all. The diffusibility of the plates is easy to measure. Then the adhesive can be selected from the adhesives available on the market.

In partial connection of the starting plates, the diffusibility of the connecting material is not decisive. It can be worked with non-diffusible adhesive. It can also be welded in places. The individual connection points should be distributed as evenly as possible over the entire surface and be small, so that the out-diffusing or Durchiffundierenden gases must traverse the smallest possible paths past the non-diffusive connection points. In the sense, the junctions should, when punctiform or patchy, individually have an extension that is preferably no greater than 25 square centimeters, preferably no greater than 2.5 square centimeters and even more preferably no greater than 0.25 square centimeters. In the case of strip-shaped joints, the stripes are designed in such a way that they reproduce the same conditions in terms of area and spacing as the pointwise or patchwise joints.

Of the total contact surface between the output plates to be joined, at most 80%, preferably at most 50% and even more preferably at most 20% should be closed by welding surfaces or adhesive surfaces.

Optionally, even non-diffusible or poorly diffusible reaction adhesives or hot-melt adhesives that adhere immediately, and highly diffusible adhesives can be combined that only develop an adhesive power over time. The combination is then preferably carried out by applying the various adhesives to different adhesive surfaces. With the combination, a very fast connection of the output plates can be achieved. A fast connection is advantageous if z. B. two output plates are extruded parallel to each other and one above the other, to connect them to each other after one-sided surface processing as endless strands.

To apply adhesive, adhesive rollers or nozzles from which the adhesive is sprayed are suitable. With the rollers can be any desired distribution (both in terms of areal extent as well as with respect to the thickness of the order) of the adhesive on the contact surfaces cause. The adhesive application can be handled like a paint job. In the sense, instead of the rollers and order plates are suitable for the model of printing plates. Nozzles are suitable as a glue tool especially for hot-melt adhesive. When heated, the adhesive in the heated nozzle is so thin that it can be sprayed on as a liquid. The adhesive can be sprayed in the form of droplets or as a jet. To achieve a partial adhesive application, the adhesive jets can be applied at intervals from each other and the droplets in a corresponding scattering. For the application of a diffusion-open adhesive, a drop-shaped or strip-like application is also suitable. It can also be a spread by means of tassel or the like.

Alternatively or additionally, a further method for effecting sufficient water vapor diffusion is provided. This variant relies on a mechanical connection of the plates. The juxtaposed or contacting plates are held together by mechanical connection. The compound can by the partial adhesive application described above and / or by diffusion-open adhesive can be supported on the contact surfaces. Optionally, a mechanical connection without adhesive on the contact surfaces can be effected. In the situation last described, the diffusion can not be hindered by adhesive.

The mechanical connection is effected by connecting elements which engage in the plates on the sides of the plates and / or engage around the plates. This connection can be point-shaped and / or linear and / or surface-wise. The fastening possible with connecting elements can be modeled on the connection possibilities with the adhesive and vice versa.

The fastening points have a dimension corresponding to the areal extent of the fastening elements. The designation as points corresponds to the technical language, although it concerns surfaces. Preferably, the attachment points are evenly distributed over the interface. Optionally, the attachment points also distribute according to the distribution of tensile forces in the plates. The expected tensile forces result from the loading of the plates and / or from the load-independent plate deformations.

The fastening lines have a dimension corresponding to the areal extent of the fastening elements. The designation as lines corresponds to the technical language, although it concerns surfaces. The linear attachment may be rectilinear and / or curved. Preferably, the attachment lines are straight and across the entire contact surface. The attachment lines may be distributed according to the attachment points described above. The same applies to the distribution of the fastening lines as for the distribution of the fastening points.

Optionally, the fasteners have the form of anchors. Therein are found on the connecting elements thickened areas that give the fasteners the necessary tear resistance in the foam. The pull-out strength can also be achieved in other ways than by thickening. For example, various oppositely inclined fasteners already have an advantageous pull-out strength due to their opposing inclination. Preferably find elongated, unprofiled on their length connecting elements for the connection variant with opposite slope application. The connecting elements can be obtained by cutting to length simple profile strands or by cutting out of plates. Alternatively, the fasteners are also glued in the plates. This increases the pull-out strength. For the fasteners recesses are incorporated into the plates. The recesses are adapted to the connecting elements or vice versa. Conveniently, the use of milling cutters for the production of recesses. Disc milling cutters as well as end mills and face milling cutters are suitable.

With cutters can laterally in the shortest time a recess can be made. The milling movement can be CNC controlled or controlled by templates. Simple movements can also be controlled with limit switches.

With the cutter can also be incorporated shallow recesses for fasteners in the foam, in which the fasteners are inserted laterally. Here, the shape of the connecting elements and the recesses may vary even further. Optionally, even lateral shapes with lateral curves and / or straight lines with such shapes are combined towards the center of the plate at the connecting elements.

The different cutters have different working postures with respect to the plate, but in some cases also characteristic working postures. The end mill can stand different. The side milling cutter runs with its working plane / direction corresponding to the recesses regularly transversely to the longitudinal direction of the plate and inclined to the plane of the plate, possibly also inclined to the plate longitudinal direction. The end mill stands with its working direction like the side milling cutter.

In addition to the machining by milling cutters, it is also possible to produce grooves, recesses, etc. by means of CNC-controlled glow-wire cutting technology.

Optionally, the output plates are processed individually (before stacking) or the plastic foam plates are processed with superimposed output plates.

For the connecting elements is preferably the same plastic as provided for the output plates, in XPS plates so XPS. Different extrusion can result in different volume weights. Preferably, the density of the fasteners and plates should not differ more than 20 kg per cubic meter, more preferably not more than 5 kg per cubic meter.

The fasteners are optionally used after lateral processing of the plates. Then a sufficient dimensional stability is provided. Optionally, the fasteners are inserted after machining. Then, an excess of the connecting elements is provided, so that the connecting elements are detected by the lateral processing.

The connection is described above on two output panels. However, according to the method of the invention, 3 and more plates can also be connected to one another.

The bonding according to the invention surprisingly has other advantages, because it reduces the number of thicknesses to be extruded. For example, 60-inch plates (the number hereinafter referred to as the thickness in mm) can be used to make a 120-plate or a 180-plate or a 240-plate; From a 50's plate a 100eter plate, a 150iger plate, a 200eter plate or a 250iger plate. In the cases described, from a single thickness format by duplication / connection already three or four more commercially available thickness formats. It can also be combined with different thickness plates, z. 50's and 60's plates or 40's and 50's plates if there is no danger of plate curvature. The production according to the invention is preferably restricted to the use of plates from the 30th to the 70th. Still more preferably, plate making is limited to the use of 40's, 50's and 60's starting plates. Up to the 60's plate thickness can also achieve even better lambda values reliably. This results in a further improvement of the plate produced according to the invention.

Preferably, by the compound of the invention, a new plate with a minimum thickness of 70 mm.

Alternatively, for the production of plates with tongue and groove three output plates are doubled in the sense of the invention, the middle output plate relative to the other two output plates (lying in a horizontal position above and below) is offset so that they are connected to two Recovers plate sides and forms a groove and protrudes on the two sides of the plate and forms a spring. Plates made in this way can be laid in a closed position, wherein springs of one plate engage in the grooves of adjacent other plates.

Optionally, for the production of plates with shiplap, two output plates are doubled according to the invention, wherein one output plate is offset from the other output plate. That is, the one output plate jumps back on two sides and on the remaining other sides. As a result, the resulting panels can also be laid closing by overlapping the panel on all sides with the shiplap of the adjacent other panels.

In the production of tongue and groove or production of stepped rabbet with the duplication according to the invention also results in a savings of foam, because the conventional assembly of the foam strand milling out of tongue / groove and Stufenfalz provides, combined with a correspondingly high consumption of Schaumstrangrandes.

The compound of the invention can be applied to various plastics. These include polystyrene, polyethylene, polypropylene, and propylene copolymers.

In the scheme according to 1 and a drawing after 2 Various embodiments of the invention are described.

Starting plates for the embodiment are conventionally made polystyrene foam sheets having a density of 30 to 45 kg per cubic meter. In this case, an endless foam strand has been produced in the first embodiment by means of a tandem extrusion plant. The tandem extrusion line consists of a primary extruder and a secondary extruder. In the primary extruder, the plastic granules are melted with the usual various additives and processing aids and mixed to form a homogeneous melt. The resulting melt is mixed with carbon dioxide as blowing agent and the mixture further homogenized on the way through the extruder. This is followed by a cooling of the melt to the extrusion temperature in the secondary extruder. There is considerable pressure in the secondary extruder. When discharging the melt through the nozzle of the extruder, a relaxation of the melt takes place. As a result, the blowing agent expands and forms a plurality of uniformly distributed bubbles / cells in the melt according to its fine distribution.

In another embodiment, instead of a tandem plant, an extrusion plant with a single extruder is used. It may be extruder of different design, for. B. single screw extruder or twin screw extruder.

The melt is foamed in a so-called calibrator. These are metal plates which give the resulting foam strand its thickness.

After sufficient cooling, the resulting foam strand is freed on one side or on both flat sides by surface treatment of the extrusion skin. This can be done inline with the foam production or after cutting the foam strand to sheets without previous surface treatment. It can too Plates are used, which are cut in a known manner from a foam strand which has been processed before cutting to length on both opposite flat sides. The machined and cut plates can be used without intermediate storage or after prior storage, ie connected in accordance with the invention.

The surface treatment takes place in the embodiment by means of milling. In other embodiments, another surface treatment may find application.

The surface treatment of only one flat side and inline is preferably used when a similar foam strand is produced in parallel and processed on the surface, so that these foam strands can be joined together.

In the embodiment, plates which have been processed and stored in the known manner described above are stored in one station 1 side by side and one behind the other on a roller table (consisting of successively arranged rollers) placed so that they form two side by side and adjacent plate strands. These plate strands are on the roller table in a station 2 pushed. There, one of the strands is sprayed from above at the connecting surface of the starting plates with a diffusion-open adhesive. In other embodiments, both strands are sprayed with a diffusion-open adhesive. The diffusion-open adhesive possesses a sufficient diffusion permeability for water vapor after connection of the starting plates according to the invention. In the case of the diffusion-open adhesive, the plate surface can be coated with a more or less closed adhesive layer.

In another embodiment, a non-permeable adhesive is sprayed using the same equipment and products. This happens with droplets of about 1 mm in diameter. The sprayed amount is so small that the impinging adhesive droplets do not run on the plates. At the same time, the nozzle openings are pivoted / set apart so far that there is a distance between the impinging adhesive droplets which is greater than four times the droplet diameter. The described distance characterizes the scattering of the droplets. After connection of the starting plates according to the invention, the adhesive surfaces are so small and there is so much distance between the adhesive surfaces that the water vapor can sufficiently diffuse therebetween.

In a further, not shown embodiment, rays of a non-permeable adhesive are applied at a distance between 1 and 100 mm apart with a beam diameter between 0.1 mm and 5 mm on the contact surfaces of the output plates. This results in adhesive strips with sufficient spacing, so that as in the previously described embodiment, a sufficient diffusion of water vapor is ensured.

In the first described embodiment, the output plates arrive after the application of adhesive in a station 3 , in which the output plates are erected on the roller table and pressed against each other. At the same time there is a centering of the output plates to each other or a desired offset of the output plates against each other.

In a station 4 The resulting new plates are stored or stacked.

In a further embodiment, not shown, a single strand of successive output plates is produced on a roller table or a conveyor belt and provided with adhesive. The additional starting plates to be joined are taken by hand or by machine from a stack and positioned on the output plates located on the roller table or conveyor belt. For the machine handling of the output plates, a robot is also suitable. The robot can work with a gripping tool and / or a vacuum suction. Vacuum suction is possible even when the surface of the base plates is rough when the suction heads / surfaces rest against the base plates with a wide and soft / conformable / elastic seal.

In another embodiment, the inventive connection of the starting plates can also take place without a roller table or conveyor belt by means of a robot in that the robot first takes a starting plate processed according to the known method described above from a stack, moves it in front of a fixed nozzle or via a stationarily arranged roller and Then cover with the side on which the adhesive application is on the stack or press on the top plate in the stack. This creates a connection between two output plates to a new plate. The new plates can then be deposited by the robot on another stack. Advantageously, the robot can position the output plates when connecting so that either new plates with tongue and groove or new plates with stepped rabbet are created as desired.

Optionally, two robots may also work together by each robot removing a processed output plate described above from a stack. If desired, both robots can work on their starting plate for an adhesive application. Optionally, however, only one of the two output plates to be joined also receives an adhesive application. The connection then takes place in that each robot presses its output plate against the output plate of the other robot. Thereafter, it is provided that one of the robots releases its output plate and that the other robot places the resulting new plate on a stack.

In another embodiment, a robot is used with a table together by a top plate described above is placed on the table and there is provided from a moving nozzle with the adhesive and then taken from the stack a second processed starting plate and on the already provided with adhesive Plate is pressed.

Advantageously, in further embodiments, the robots can perform a surface treatment on a still provided with extrusion skin plate or foam strand itself. Then, by the robots or the provided single robot z. B. a milling tool moves. Alternatively, a cut to length, still provided with an extrusion skin plate can also be guided by a robot along a fixed machining tool along. Several robots can also cooperate in such a way that one robot holds the output plate still provided with an extrusion skin and the other robot guides the processing tool. In the same way, the adhesive can be applied.

In another variant, only one robot is provided, which cooperates with a table or a fixed chuck or another holding device by holding the still provided with an extrusion skin starting plate with the holding device, while the robot with a processing tool removes the extrusion skin, then with Apply the adhesive to a nozzle or other tools and connect to a second machined output plate. Optionally, two robots can be used instead of one robot. As other tools rollers, coating devices, and plates can serve.

For the one-sided processing of an output plate, it is advantageous if the robot or the holding device at the same time prevents a curvature of the single-sided processed plate. Suitable for this purpose are suction plates and / or holding devices with a plurality of suction heads, which load the output plates at the edge and in the middle in such a way that bending forces occur in the output plate which compensate for the stresses which otherwise could lead to a curvature of the output plates.

The described robots are also advantageous because they allow you to easily compensate for thickness tolerances of prefabricated output plates. To compensate for thickness tolerances and the table described above can be equipped in a special way, for. B. by a resilient arrangement or a compliant training.

2 shows two output plates 10 and 20 with a touch page 14 , a top 13 and a bottom 16 , The two overlying Ausgansplatten 10 and 20 are by fasteners 15 connected with each other. In each case run two adjacent connecting elements 15 inclined at 90 degrees to each other. With a plate thickness of 50 mm, the fasteners have 15 a length of 60 mm and a thickness of 35 mm. The connecting elements 15 have the shape of long strips in the dimensions 60 mm × 35 mm × length of the plates to be joined.

In further embodiments, the thickness of the output plates is 40 or 60 mm, the thickness of the connecting elements 20 to 50 mm and the length of the connecting elements 40 to 80 mm, the length of the connecting elements is equal to the plate length.

The connecting elements 15 are made of the same material as the starting plates 10 and 20 made, XPS.

In the embodiment, the fasteners are cut from 35 mm thick XPS panels. For cutting a saw has been used, in other embodiments punching or milling cutters are used.

The to the fasteners 15 belonging recesses in the plates 10 and 20 have been produced with a side-milling cutter that has the same radius as the fasteners 15 at the bulge has, namely 30 mm. With the disc milling cutter, the recesses can be incorporated extremely quickly. This is particularly advantageous for processing plates which are continuously moved on a roller table. Then it is envisaged that the milling machine will be a small piece with the plates 10 and 20 moved. The faster the recesses are formed, the lower the necessary range of motion of this working variant. In another working variant, the plates are separated and held for a short time to incorporate the recesses. The shorter the processing time, the better the work flow with the plates.

In the mechanical connection of the plates over the entire plate length and width, the plates are inline continuously grooved in that the plates are guided by means of a roller conveyor under a cutter, wherein the grooves are milled.

In the embodiment, the plates are created 10 and 20 in that initially (over a certain working time) two XPS strands are continuously produced by means of two extruders and, after sufficient cooling, are driven over each other. These XPS strands initially have an extrusion skin on all sides. Before the strands come into contact with each other, the XPS strands will be at the interface 14 freed from the extrusion skin by milling. Subsequently, the XPS strands come together to the plant. The strand weight prevents bowling of the XPS strands. In addition, both strands between two conveyors, in the exemplary embodiment, two roller paths, held. The upper rollers are adjustable and / or flexible arranged to account for thickness tolerances and format changes can. The upper roller conveyor also counteracts the bowls. In the exemplary embodiment, the incorporation of the recesses and the subsequent insertion of the connecting elements takes place immediately after the XPS strands lie one upon the other. In the exemplary embodiment, the connecting elements are glued. For this purpose, a small amount of adhesive is sufficient, because the adhesive is well distributed by the pressure during insertion. The adhesive used may be a hot melt adhesive. After connecting the XPS strands, they are processed on the sides and cut to length. This creates the plates 10 and 20 , The connecting elements are hardly recognizable in the resulting cut surface because they are flush and have the same structure as the plates.

For the incorporation of the recesses disc cutters are provided which can be pivotally supported on movable carriage. The swivel plane is parallel to the milling plane. Ie. the cutter comes into effect by pivoting. His activity is limited to immersion in the plastic foam and the subsequent return movement. During this process, the cutter is on the slide with the plates 10 and 20 moved. In the exemplary embodiment, two disc cutters are provided on a carriage, which are arranged inclined in the above sense. Both disc cutters are brought into operation at the same time, so that with each operation, two adjacent and inclined mutually recesses are formed. In other embodiments, even more cutters or just a milling cutter are brought into action. The different cutters can be coupled via a common drive or even have only one common control. A single cutter on a side of the plate can produce the differently inclined recesses if its milling head still has another pivoting mobility.

The plates produced after cutting the XPS strands have no connecting elements on the cut surfaces. In another embodiment, additional fasteners are set there in an additional step.

Claims (51)

Process for the production of HCFC-free extruded plastic foam boards with a minimum thickness of 70 mm, in particular polystyrene foam boards, wherein at least two starting plates are joined together to form a thick plate, wherein prior to joining at all connecting surfaces in a first step, the extrusion skin is removed at the starting plates, so that in the following connecting steps only extrusion skinless plate surfaces are connected to each other and that at the connecting surface thereby a sufficient diffusion is open, in that a diffusion-open adhesive is used for the connection in the case of full-area connection, with optionally additionally a mechanical connection being effected by means of connecting elements. A method according to claim 1, characterized in that a diffusion openness at the interface or contact point of the starting plates is produced in the new plate, which is not more than 50%, preferably not more than 20% and still more preferably not less than that Diffusion openness of a starting openness of an output plate is. A method according to claim 1 or 2, characterized in that in the case of partial area connection and localized welding or localized bonding with non-diffusible adhesive or only slightly diffusible adhesive, these connection points do not exceed 2.5 square centimeters and even more preferably no greater than 0 for dot or spot shape , 25 square centimeters. Method according to one of Claims 1 to 3, characterized in that, in the case of part-area connection and point-wise welding or point-to-point bonding with non-diffusible adhesive or only slightly diffusible adhesive, the connection points and their spacing are designed such that that at most 80%, preferably 50% and even more preferably at most 20%, of the contact area between the doubled starting plates is closed by the welding surfaces or adhesive surfaces. Method according to one of claims 1 to 4, characterized by a combination of different adhesives in the bonding of the output plates. A method according to claim 5, characterized by the use of a reaction adhesive and / or a hot-melt adhesive for producing a preliminary and rapid connection and the use of diffusion-open adhesive by the way. Method according to one of claims 1 to 6, characterized by the spraying of adhesive or printing of adhesive or spread of adhesive. A method according to claim 7, characterized in that no or only slightly diffusion-open adhesive a) is sprayed into droplets while maintaining a distance between the droplets or b) applied in strips or c) is printed. A method according to claim 7, characterized by the use of rollers or plates for printing the adhesive. A method according to claim 9, characterized by the use of nozzles for generating the adhesive droplets, wherein the droplets are scattered. Method according to one of claims 1 to 10, characterized in that starting plates are used, which a) at the seam or joints or contact surface are flat or b) by heat treatment and / or c) by pressure and / or bending of the corresponding others D) are joined together in the mold or as part of extruded foam strands, so that a new strand is formed, which is cut to new plates. Method according to one of claims 1 to 11, characterized by a surface treatment of the starting plates by means of milling or planing or cutting or sawing. Method according to one of claims 1 to 12, characterized by the production of all desired new plates by combining output plates having a thickness of 30 to 70 mm, preferably by combining 40iger output plates and 50iger output plates and 60iger output plates. Method according to one of claims 1 to 13, characterized by offsetting the output plates when connecting to produce tongue and groove or a Stufenfalzes on the new plates. Method according to one of claims 1 to 14, characterized by an adhesive application of the starting plates, a) wherein the output plates are in two adjacent rows one behind the other on a roller table or belt, and characterized by subsequent erection of the output plates and their compression or b) wherein the output plates in a row successively rest on a roller table or a conveyor belt or on a table and for each of the plates, a second plate is taken from a stack and pressed onto the associated lying plate or c) wherein a starting plate is taken from a stack and after adhesive application with the adhesive side back to the stack and pressed and the resulting new plate is placed on a new stack or d) wherein at the same time two starting plates are taken from a stack or two stacks and provided with an adhesive application and joined together. Method according to one of claims 1 to 15, characterized in that a) starting plates are used, the extrusion skin is removed on both opposite flat sides or b) starting plates are used with extrusion skin, the extrusion skin is removed on a flat side or d) starting plates in the form of two foam strands are used, the extrusion skin is removed on a flat side and then provided with an adhesive and bonded together and then cut to length; or e) starting plates are used in the form of a foam strand, the extrusion skin is removed on a flat side and then with an adhesive application provided and connected to prepared other plates. A method according to claim 16, characterized in that starting plates are held when removing a foam skin and protected against curvature. A method according to claim 16 or 17, characterized in that cut to length starting plates be taken from a pile and / or put new sheets on a pile. Method according to one of claims 15 to 18, characterized by the use of one or more robots for plate movement and / or by the use of a table or a chuck as a holding device for the output plates. A method according to claim 19, characterized by vacuum plates or suction cups as holding means for the output plates. Method according to one of claims 15 to 20, characterized by the use of stationary adhesive application devices and / or fixed surface processing tools when using a robot for the plate movement. Method according to one of claims 15 to 21, characterized by a tool movement by means of robots. A method according to claim 1 to 22, characterized by the use of connecting elements for the plastic foam sheets, with which two or more plastic foam sheets are mechanically interconnected. A method according to claim 1, characterized by a punctiform and / or linear or planar connection of the plates. A method according to claim 24, characterized in that in the plastic foam plates or in the output plates recesses are incorporated, in which engage the connecting elements and / or that the connecting elements engage around the plates. A method according to claim 25, characterized in that recesses over the entire width and / or length of the plates are incorporated. Method according to one of claims 23 to 26, characterized by use of elongated connecting elements with inclined to the plastic foam sheets arrangement or transverse arrangement. A method according to claim 27, characterized by using rod-shaped or plate-shaped or disc-shaped connecting elements. A method according to claim 28, characterized by using connecting elements which show a circle section in the plan view. Method according to one of Claims 23 to 29, characterized by the use of connecting elements which, in plan view, show a surface with a different edge curvature and / or with a straight edge profile and / or a partially curved and partially straight edge profile. Vefahren according to one of claims 23 to 30, characterized in that the recesses for the connecting elements are incorporated in the superimposed output plates or individually in the output plates. Method according to one of claims 23 to 31, characterized in that the recesses are incorporated with a side milling cutter or end mill or end mill, wherein the working direction of the cutter as the connecting elements extends. A method according to claim 32, characterized in that a disc milling cutter is used, which has the same radius as the connecting elements at the bulge. Method according to one of claims 23 to 33, characterized in that a disc milling cutter is used whose radius is at most equal to the occurring on the connecting element maximum outward curvature. Method according to one of claims 23 to 34, characterized by the use of EDP-controlled or template-controlled milling cutters. Method according to one of claims 23 to 35, characterized in that a clamping of the connecting elements is generated in the recesses. A method according to any one of claims 23 to 36, characterized in that the end mill works on individual output plates from the contact surface of the output plates into the plate. Method according to one of claims 23 to 37, characterized by gluing the connecting elements and / or the use of connecting elements with thickened ends. Method according to one of claims 23 to 38, characterized by the use of connecting elements of the same plastic foam, wherein the density of the starting plates and the connecting elements not more than 20 kg per cubic meter, preferably not more than 5 kg per cubic meter from each other. Method according to one of claims 23 to 39, characterized by the incorporation of recesses in the plate sides, which end in front of the top or bottom of the lying plastic foam plate. Method according to one of claims 23 to 40, characterized by the incorporation of recesses whose ends have a distance of at least 10 mm to the top or bottom. Method according to one of Claims 23 to 41, characterized in that a) XPS plates are used as starting plates. B) The plate thickness is 40 to 60 mm. C) The connecting elements have a thickness of 20 to 50 mm and / or two or more output plates lying one above the other have a length of 40 to 80 mm. Method according to one of claims 23 to 42, characterized in that the connection elements are obtained by cutting profile strips or cutting out of plates. Method according to one of claims 23 to 43, characterized in that dimensionally stable connecting elements are inserted into the recesses or before the lateral processing of the output plates, the connecting elements are used and the lateral processing of the plates then takes place. Method according to one of claims 23 to 44, characterized by the use of robots for milling or the use of milling stations with milling machines, which are moved on or in linear guides and / or sheet guiding. A method according to claim 45, characterized by the use of multiple cutters on a common support and / or with common control and / or with a common drive. A method according to claim 46, characterized by the use of a milling cutter with a swivel head with additional pivoting mobility for conversion to differently inclined recesses. Method according to one or more of claims 23 to 47, characterized by cutters which are moved with the plates. or by stationary milling stations where the plates rest. Method according to one of Claims 42 to 48, characterized by the use of guides which are formed by sliding carriages and / or pivot bearings. Method according to one of claims 1 to 49, characterized by the use of starting plates, which have a foaming skin at the top and the bottom with lying plastic foam plate and are surface-treated on the contact surface. Method according to one of claims 1 to 50, characterized by the use of foam sheets of polystyrene, polyethylene, polypropylene, propylene copolymers.

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