TITLE Assembly for pressing of pressed parts, especially those made out of wood TECHNICAL FIELD The invention relates to a new arrangement for pressing of pressed parts, especially those made out of wood, preferably for pressing of wooden lamellae into large elements for timber constructions, with a press unit having a press table arranged to support the material to be pressed, and a counter-pressure plate which can be moved up and down arranged above the press table, where for the application of a compressive force onto the material to be pressed, a plurality of pressure elements, particularly arranged side-by-side, such as hoses, bags, balloons, pads or suchlike, are arranged underneath the counter pressure plate, which can be inflated with pressure fluid, particularly compressed air, and be pressurized from a pressure fluid source, particularly a compressed air source. BACKGROUND When pressure-bonding bulky and/or large-surface press parts with dimensions from e.g. up to 3 m width and up to 16 m length with a thickness of e.g. 0.1 to 0.5 m, it is extremely difficult to apply the necessary compacting pressure evenly and then uniformly maintain same across the entire surface of the press parts to be connected to each other, once the compacting pressure is reached. Such presses furthermore have a complex design and are actually still not user-friendly or energy-efficient. It is an object of the present invention to provide an arrangement having a press table and a counter-pressure plate designed appropriately rigid and torsionally stiff so that they can absorb the tensile, compressive, and shear forces that occur during a pressure application without any negative impact on a material to be pressed. It is a further object of the present invention to disclose an advantageous spacing between the locking wedges, guide rails and carrier rollers, and a preferred range for the ascent 2 angle of the guide rails. A particularly favorable ascent angle of the lock surfaces of the locking wedges is disclosed for deadlocking the counter-pressure plate during application of pressure by the pressure elements, and a favorable intermediate position for feeding a material to be pressed into the press unit, as well as use of a protective foil which covers the pressure elements against the material to be pressed. It is yet a further object of the present invention to describes a geometrical arrangement of the pressure elements, the pressure elements can be filled with pressure fluid efficiently, an effective configuration of the pressure elements on the surface is provided, having preferred material characteristics of the pressure element walls, preferred tubing for use and advantageous sizing for the same. It is yet a further object of the present invention to teach a favorable adjustment for the size of the clearance between the press table and the counter-pressure plate and/or its pressure elements and the respective material to be pressed, the structure of the framework of the press unit, natural stabilizers for the material to be pressed in the press unit and a favorable arrangement for feeding and discharging the material to be pressed. SUMMARY OF THE INVENTION The object of the invention is to apply uniform pressure onto the entire surface of the material to be pressed formed with the press parts, on the one hand, and on the other to obtain a press device with low energy consumption with concurrent high operational comfort. The present invention relates to an arrangement for pressing of pressed parts from a material, the arrangement comprising a press unit having a press table to support the material to be pressed, and a counter-pressure plate, which can be moved up and down, arranged above the press table, where for the application of compressive force onto the material, a plurality of pressure elements, which can be pressurized from a pressure fluid 3 source, are arranged between the counter-pressure plate and the material, characterized in that the press unit comprises a plurality of guide rails equidistantly arranged in a parallel upward slope at an ascent angle of no more than 300 to a plane of the press table; and, the counter-pressure plate of the press unit comprises a heavy plate which is rigid and torsionally stiff across its entire surface area and on the side facing the material and/or the pressed parts, wherein the longitudinal sides and/or longitudinal lateral flanks further comprise carrier rollers that can engage with the guide rails to allow the counter-pressure plate to be adjustable and vertically movable by means of a drive. In a preferred embodiment the pressure elements are arranged in a side by side configuration and preferably comprise at least one of a hose, bag, balloon or pad. Preferably the pressure elements are inflatable with a pressurized fluid. Preferably the pressure fluid source comprises a compressed air source. In a preferred embodiment the counter-pressure plate comprises a series of adjacently arranged I-profile beams and side by side pressure elements and more preferably the pressure elements are arranged laterally. Preferably the drive is hydraulic With the provided plurality of expandable pressure elements pressurized with compressed air as taught by the invention, a large surface area can be uniformly pressurized. High pressure can be supplied, since the pressure elements used can be made pressure resistant easily up to 10 bar and higher, a high uniform pressure across a large surface can ultimately be achieved. With a relatively simple design of the arrangement, this high surface pressure achieved can be a multiple of the pressure that can be achieved with a vacuum forming press, in this way a maximum surface pressure of approximately ION/cm 2 is achievable.
4 Furthermore, the new arrangement is also more simply constructed and easier to operate, particularly when compared to the arrangement described in AT 406133 B. All that is needed is to provide the necessary compressed air for generating the compacting pressure and introduce it into the pressure elements. The decompression of the press is carried out by venting the compressed air from the pressure elements into the environment, while maintaining the height of the counter-pressure plate. The necessary compacting pressure can be built-up rapidly and kept constant over extended periods of time. It is not necessary to have to absorb the weight of the respective material to be pressed with the pressure elements, as the pressure elements are arranged above the material to be pressed and press against the material from the counter-pressure plate. Because of its mobility on the inclined guide rails, the counter-pressure plate is supported vertically in the press unit and is adjustable so it can be lifted and lowered such that the pressure elements and an optional pressure plate which seals these towards the materials to be pressed only have a slight bearing against the pressed goods. In order to apply the necessary compacting pressure, it is only necessary to pressurize the pressure elements and/or their pressure medium with their respective pressure. While it was previously necessary to provide e.g. tie bars between the press table and the counter-pressure plate in order to ensure the position invariance between these two components to each other during a pressing operation, it has now been provided that a high-stability location of the counter-pressure plate is securely assured through forced closure by means of locking wedges, rails or suchlike, which are arranged on this counter pressure plate and cooperate through forced closure with the top sides on the bottom side of the guide rails. In a preferred embodiment the guide rails have an ascent angle from 100 to 20*, preferably approximately 150. Preferably the wedge angle of the lock surfaces of the locking wedges is 0.050 to 0.250 greater than the ascent angle of the guide rails.
5 In a preferred embodiment the pressure elements terminate in a pressure plate for pressure distribution. A preferred embodiment of the present invention teaches the loading and unloading of the material to be pressed and the movement of the press table itself. Preferably the pressure elements are formed with hoses that are mounted or held in the longitudinal dimension of the counter-pressure plate next to one another and above a shared film. More preferably the pressure elements are affixed suspended on the counter pressure plate. In a preferred embodiment the pressure elements are mounted above the pressure plate. Preferably at least one of the pressure elements is provided with a compressor connection and with at least one valve for pressure release. In a preferred embodiment the pressure elements have flexible and/or deformable wall areas, which are substantially inelastic. More preferably the pressure elements are inflatable and are impervious to the pressed parts. In a preferred embodiment the pressure elements essentially have the same dimensions as each other, more preferably the pressure elements are formed with the same diameters and otherwise have the same dimensions. Preferably the pressure elements comprise a fabric-sleeved hose, more preferably having a structure similar to fire hoses. Preferably more than 50% of the surface of the counter-pressure plate and/or the pressure plate is covered by the pressure elements. More preferably more than 60 to 70% of the surface of the counter-pressure plate and/or the pressure plate is covered by the pressure elements.
6 Further advantages of the inventions can be derived from the following description, from the claims and the embodiments of the invention that are described and/or illustrated in the drawings. BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in greater detail, for example, by means of the drawings: Figure 1 shows a schematic arrangement of a preferred embodiment of the present invention; Figure 2 shows a schematic plan view of the invention of Figure 1; Figure 3 shows a schematic side elevation of the invention of Figure 1; Figure 4 is a detailed view of a portion of the press unit; Figure 5 is a schematic longitudinal/side elevation of the press unit as taught by the present invention; Figure 6 is a perspective view of the counter-pressure plate; Figure 7 is a detailed view of a portion of the press unit showing the schematic connection to a compressed air source and a control unit; Figs. 8a and 8b show different pressure elements schematically; and, Figure 9 is a schematic illustration of an embodiment of an arrangement for pressing as taught by the invention. DESCRIPTION OF THE EMBODIMENTS Figure 1 is a schematic illustration of an entire arrangement for pressing of press parts 1, 4 as taught by the invention, in which a press unit 6 comprising a plurality of successively arranged frame members 60 is supplied with press parts, preferably made out of wood, that are to be connected to each other into a wall panel or suchlike by means of a feeding unit 5, which are removed by means of a conveying unit 7 after the pressing process. Such pressing arrangements are particularly used for the manufacture of large-surface and in particular also bulky material to be pressed. The material to be pressed can e.g. have 7 dimensions of 16 m long, 3m wide and 0.5 m high, resulting in a total weight of 10 to 12 t for the material to be pressed from the wood parts that are to be pressure-bonded to each other. The wood parts to be pressure-bonded are e.g. longitudinal lamellae 1 and transverse lamellae 4, which are preferably used in a planed form. According to Figure 1, the longitudinal lamellae 1 are provided with bonding and/or glue layers in a bonding and/or gluing unit 2 and are loaded onto the feeding unit 5 by means of a loading unit 3 located on the side of the feeding unit 5, and are then arranged here on the same with the traverse lamellae which are advanced from the other side in the respective desired form, e.g. as a stack with the reference symbol 36, which is not directly shown in Figure 1, which is then moved into the press unit 6 through the opening 33. The feeding of same is facilitated, if a roller, air-film or belt conveyor or a similar conveyor unit is used as the feeding unit 5, for transferring heavy and bulky loads into the press unit 6 in a suitable manner. In a similar manner as the feeding unit 5, also the conveying unit 7 with discharge opening 34 arranged behind the press unit 6, is designed. Conveyor units for the stacked press parts I and 4 into and/or from the press unit 6, which are provided to be pressure-bonded to material to be pressed 36, are not represented. According to a preferred embodiment of the invention, press parts 1,4 are respectively loaded onto a multiplex or steel plate 35 in the desired arrangement, as shown in Figure 3. This plate 35 rests during the formation of the stack 36 on the feeding unit 5, which can be a roller table, for example. After the stack 36 has been formed from press parts 1,4, plate 35 and the press parts 1,4 resting upon it can be pushed or pulled on the press table 13 by sliding, by means of chain conveyors, for example. Then the press operation is performed in press unit 6. Thereafter, the bed plate 35 with the material to be pressed 36 resting upon it can be pulled out or pushed by means of a conveyor device onto conveying unit 7. In the arrangement as taught by the invention it is no longer necessary that in order to obtain a relatively small lift of the counter-pressure plate 9, which is not detailed here but shown in Figure 3, that the material 1,4 to be pressure-bonded must be moved on more or 8 fewer back plates 35 with stacks 36 and/or pressed parts 1,4 sandwiched on top of each other into the press unit 6 in order to optimally utilize the available clear span of the press unit 6 in this manner, which resulted in that the press lift remained small up to this time in that the height adjustment of the extremely heavy counter-pressure plate 9 of press unit 6 could be kept within distances as small as possible, as was the case in the press arrangement known from AT 406133 B. Figure 2 shows - with otherwise constant reference number symbols - as a schematic plan view in Figure 3 and as a schematic side elevation, the longitudinal parts I and the transverse parts 4 of the press material 36 as well as the loading unit 5 and the conveying unit 7, respectively developed as a roller table. From Figure 3, the basic configuration of the press unit 6 is shown. With a sequence of frame members 60 having rising vertical beams 10 on both sides of the press table 13, the counter-pressure plate 9 is resistant to bending and degradation and formed with I-beams 91 welded to each other on the side so as to always remain parallel to press table 13. The counter-pressure plate 9 is supported on both sides with a plurality of carrier rollers 93 arranged along its longitudinal lateral flanks on a plurality of guide rails 101 sloping upward with an ascent angle a. The counter-pressure plate 9 is held in position by means of hydraulic cylinders 96 which are respectively located above it and be moved on the guide rails 101 parallel to the I-beams 91 whether to each other with the press table 13 formed with a support plate. Figure 4 shows - with otherwise constant reference number symbols - a schematic part section diagonal in relation to the direction of conveyance of the stacks 36 of the press unit 6 show in Figure 11. Each frame member 60 is formed from two lateral frame beams 10, an upper beam 11 and a lower beam 12, which supports the press table 13. The beams 10,11,12 are connected to each other by welding and/or screwing and/or riveting into rigid individual frame member 60, which frame members 60 are connected by means of longitudinal beams into a rigid support and/or framework of the press unit 6. Along the length of the press unit 6, a plurality of such frame members 60 are arranged and the 9 beams 12 carry the press table plate 13, and/or support same N./or in combination with the support plate form the press table 13. The counter-pressure plate 9, as particularly shown in Figure 5 - with otherwise constant reference number symbols - is formed with a large number of adjacent I-beams 91 welded to each other, is very heavy and in spite of its high area propagation is completely rigid and torsionally stiff. On both longitudinal lateral flanks 92 carrier and/or traversing rollers 93 are mounted with spacing 'ha' between each other. The counter-pressure plate 9 can be moved with and/or on same on guide rails 101, which are tied to the upright beams 10 of the frame member 60, here with an ascent angle a of approximately 150 sloping upward aligned parallel to each other. These guide rails 101 have the same horizontal distance ha from each other as the roller carriers 93 on the counter-pressure plate 9. The counter-pressure plate 9 can be moved on the guide rails 101 by means of - in this case four - hydraulic cylinders 96 successively arranged at a distance of each other. Looking at Figure 6, where - with otherwise constant reference number symbols - the counter-pressure plate 9 with its traversing and/or carrier rollers 93 is shown resting on the guide rails 101 before the application of pressure. If pressure fluid, especially compressed air, is used to fill the above described pressure elements 14 the pressure elements 14 push down against the potentially present pressure plate or against its common sheathing 170 and ultimately against the press parts 1,4 and/or material to be pressed 36, on the one hand, and on the other upward against the counter-pressure plate 9 and lift same very slightly upward. At this moment, each of the locking wedges tied, e.g. welded onto counter-pressure plate 9, which are arranged at the same horizontal distances ha in relation to each other as the carrier rollers 93, make contact with their top face lock surfaces 952, which essentially have the same ascent angles beta (P) as the ascent angles a of the guide rails 101, the undersides 102 of the guide rails 101 and engage with them in force closure, whereby the counter-pressure plate 9 is extremely securely located in exactly this position and acts fully upon the counter-pressure plate without necessity of any other anchorage for position stabilization e.g. by means of anchor bracing or suchlike during the time when pressure is introduced into the pressure elements 14. In addition, the counter-pressure plate 9 can respectively be individually adjusted to the respective height of the material to 10 be pressed 36,1,4 and take-up any height within the support frame 9 of press unit 6, and is no longer restricted to one or only very few height positions. With reference to Figure 4, the pressure elements 14 are covered on the outside by textile or metal sheathing 170 and tied onto the counter-pressure plate 9. The counter-pressure plate 9 can be moved by means of the hydraulic cylinders 96 on the inclined guide rails 101, as previously described. The pressure elements 14 are preferably inflatable and push downwardly in the direction of the arrow and away from the counter-pressure plate 9. During or after the completion of pressurization, the pressure elements 14 relax and the dropping down and/or moving down of the counter-pressure plate 9 resulting from relieving the force closure between the locking wedges 95 and the guide rails 101, is prevented by the hydraulic cylinders 96 keeping the counter-pressure 9 plate in its exact position. The lift of the counter-pressure plate 9 is denoted with H. As can be seen from Figure 4, the pressure elements 14 are suspended on the counter pressure plate 9 and/or are attached to it in a manner which is not represented in detail. The pressure elements 14 are illustrated in the form in the unpressurized state before and/or after pressure application. With 14', the pressure elements are denoted in their pressurized form. Depending on the pressure application, the pressure elements 14 and/or an optionally provided pressure plate at its bottom end or textile sheathing 170, is lowered as needed. In order to reduce the compressed air volume required for the expansion of the pressure elements 14 and thus the time for pressurization and/or the positioning stability of the pressure elements 14, rounded filler bodies 15, e.g. wooden or plastic roads are arranged around the edges of the pressure elements 14. In the pressing position, the pressure elements 14 with the tubular and/or round cross-section have an elliptical shape because of their deformation under pressure. The pressure elements 14 may have flexible and/or deformable wall areas. Advantageously, fiber-reinforced (plastic) hoses are used that are substantially flat and/or nearly flat without pressure, just as represented with 14', and which adopt a specified form 11 in each case insofar as they are squeezed in between the press table 13 and/or the material to be pressed 36 and counter-pressure plate 9, attempt to return into the actual specified form. Pillow-shaped, pad-shaped, bag-shaped or differently shaped pressure elements 14 can be used instead of hoses. It is important is that same are designed to be appropriately pressure fluid sealed, particularly airtight and have adequate pressure resistance. The pressure elements 14 are advantageously arranged side-by-side in the longitudinal direction of the press unit 6. Between the individual pressure elements 14, advantageously spaces can run to keep the pressure elements 14 in position. The spaces and/or the pressure elements 14 with their filler bodies 15 can have the same height in the unpressurized position of the pressure elements 14. Figure 7 shows - with otherwise constant reference number symbols - a pressurized pressure element 14 in a press unit 6 as a longitudinal section. A closure element 25 is provided in the end area of the pressure elements 14, by means of which decompression is possible, if necessary. On the other end of the tubular pressure elements 14 is a connection 26 for the supply of compressed air from a compressed air source 27 and/or a compressor. A control unit 28 regulates the compressed air source 27 and/or the inlet valve on connection 26 of the pressure element hose 14. If necessary, the control unit 28 can also regulate the closure 25, namely for bleeding compressed air when the press operation is completed. The lift H of the counter-pressure plate 9 with regard to the clear height of the pressroom can be advantageously small. According to a preferred embodiment it is provided that the lift H is approximately 5 to 15% of the maximum press clearance and/or the maximum distance between the press table 13 and the underside of the pressure elements 14. The surface of the pressure absorption plate 9 should favorably be occupied more than 50% with pressure elements 14, particularly more than 60 to 70%. In this manner, a 12 particularly uniform and appropriately high and uniform surface pressure is achievable. An advantage of the new press unit 6 is that the lift H of the counter-pressure plate 9 is no longer limited, since same is essentially movable along the guide rails 101 parallel to the press table 13. The advantage thus is that only one dimension of the pressure elements 14 with the same cross-section is required. From an economical perspective it is naturally favorable to provide small press strokes, such as a lift of approximately 5 cm, for example, which is also favorable in terms of operational safety. The assembly of the press parts 1,4 to be connected on the feeding unit and/or on the bed plate 35 can be facilitated by means of different machines; such devices have not been detailed in the drawing however and are obvious for a person skilled in the art. Fig. 8a and 8b show a plan view of different layouts of the pressure elements 14. In the left area of Fig. 8a U-shaped and the right area shows a snake like pressure element 14, each of which are represented with appropriate closures 25 and/or compressed air connections 26. Fig. 8b represents a plan view of schematic below-shaped and/or square and wrecked angular and/or round or similar formed pressure elements 14. In principle, the pressure elements 14 can have any form of cross-section and/or form of volume. Longitudinal tubular shapes and hoses with an essentially circular or elliptical cross-section have proven to be particularly advantageous, however. Advantageously, fire hoses or those hoses with a similar structure are used. As already mentioned above, it is advantageous if the pressure elements 14 are supported by the counter-pressure plate 9. From an operational point of view it is further advantageous if a device for keeping the compacting pressure constant is connected to the control unit 28, by means of which the pressurization with compressed air can be adjusted over extended press periods. Depending on circumstances, in special cases it may be beneficial, if for the adjustment of a desired, possibly different pressure in individual pressure elements 14, same are supplied independently of each other with compressed air and are respectively provided and/or connected with a compressed air source 27, which is controlled from control unit 28.
13 The individual pressure elements 14 are advantageously reciprocally identically sized and/or designed with the same diameter and/or have the same dimensions. The form and type of the embodiment of a stack 36 to be pressure-bonded from longitudinal lamellae 1 and traverse lamellae 4 is optional; these lamellae can also be supplemented through flat wooden boards, if necessary. In principle it is possible to encase the press unit 6 with the guide rails 101 and provide cladding for thermal insulation, if necessary, and/or heat the press interior. Figure 9 shows an embodiment of an arrangement as taught by the invention, in which the press table 13 between the feeding unit 5 and a loading and/or conveying unit 7 connecting to the press unit 6, can be moved on rails 56, as shown in Figs. I to 3. Between the feeding unit 5 and the press unit 6, a glue application unit 2 is arranged, under which the press table 13 loaded with the material to be pressed 36 stack can pass through. The press table 13 is rigidly designed and can be reinforced by means of reinforcing braces, or suchlike, if necessary. It carries the material to be pressed 36. The counter pressure plate 9 along with the pressure elements 14 arranged underneath it can be lowered along the guide rails 101, until the pressure elements 14 bear against the material to be pressed 36 or are arranged just above the material to be pressed 36. When the counter-pressure plate 9 is adjusted in the respectively desired defined distance to the press table 13 and/or to the material to be pressed 36, the above described pressure elements 14 are pressurized with pressure fluid whereby the sheathing 170 and/or optional pressure plate 17, is pushed down against the material to be pressed 36. Through the pressurization of the pressure elements 14, the counter-pressure plate 9 is pushed up, the carrier rollers 93 are lifted very slightly above the top side of the guide rails 101, and in its position the inclined top face lock surfaces 952 of the locking wedges 95 are force-closed with the undersides 102 of the guide rails 101, whereby an extremely stable location on the counter-pressure plate 9 is achieved at any pressure. At the completion of the press operation, the pressure elements 14 are depressurized. The pressure elements 14 relax, the carrier rollers 93 are supported again on the guide rails 101 14 and the counter-pressure plate 9 is held in position by the hydraulic cylinders 96. The material to be pressed 36 is unloaded and can be conveyed by means of the press table 13 into the conveying unit 7. In the above outlined manner, the machine set-up time has been minimized, and a quick transport of the material to be pressed 36 to or from the press unit 6 is assured. Only the pressure which is introduced into the pressure elements 14 and exerted by the same represents the compacting pressure exerted to the press parts 1,4 of the material to be pressed 36. The control and the feeding of the already previously described counter pressure plate 9 hydraulic cylinders 96 is centrally performed with appropriate hydraulic pressure fluids or with compressed air.