DE102007061157A1 - Pressing device for producing laminar component, has clamping device provided at upper and lower pressing surfaces of upper and lower heating plates for flat and fold-free contact of structured paper on upper or lower pressing surface - Google Patents

Abstract

The device (1) has a clamping device (13) provided at upper and lower pressing surfaces of upper and lower heating plates (3, 2) for flat and fold-free contact of a structured paper (12) on one of the pressing surfaces. A holding device (14) is provided at the pressing surfaces for holding the paper before, during and after a pressing process. The clamping device and/or the holding device are fastened to the upper plate, and are movable with the upper plate. The holding device is provided with an intake-sided front retaining device (16) and/or an output-sided rear retaining device (15).

Description

The The invention relates to a pressing device for the production of flat components with at least one structured Surface, with an upper, an upper pressing surface having heating plate and a lower, a lower pressing surface having heating plate, wherein structural paper between the pressing surfaces is provided.

The Production of surface-structured components via Pressing has been known for a long time. Usually, the Production of, for example, laminates in continuous working press plates used structured press plates, to a certain surface in a surface of the laminate Impress surface structure. The usage of press plates is a well-known and known for decades in practice usual type of surface structuring. Due to manufacturing problems in the production of surface structures in Press plates is the degree of agreement between a surface structure in the press plate and the as a template for the structure of the press plate serving Original structure limited. The means of structural press plates Available structure result when impressing a Surface structure in the surface of a component is therefore only slightly authentic.

press plates are commonly used in mass production of flat Used components. Can with a press plate carried out up to 300,000 pressing operations become. Afterwards it is necessary the surface structure to work up the press plate, which is costly. Otherwise are also the manufacturing cost of Preßbleche comparatively high. While these costs are in mass production not particularly affect, are smaller quantities of pressed parts economically ultimately can not be produced by means of press plates.

To solve this problem is in the DE 42 10 062 A1 has been proposed to use instead of the use of press plates as texture sheets called structure paper. Such a structure paper is a material in the surface of which a surface structure is embossed. This material, which is also referred to as a release paper or in the English "release paper", is a paper that has a certain surface design, as a negative print on a structurable surface of a component after peeling off the paper, for example, a pattern such as a wood grain or any graphic designs. Textured papers can be used to create surface structures in a component that have a high degree of authenticity. The term "structured paper" as used herein is used synonymously for "release paper", "release paper" or "texture film".

In the in the DE 42 10 062 A1 described methods are mentioned different ways of using textured paper. In one embodiment ( 1 ) three strips of textured paper are provided, between which two laminates are arranged. In another embodiment ( 2 ) is provided a meander-shaped structure paper, in the folds each laminates are arranged. In a third embodiment ( 3 ) a laminate is inserted between two structured papers. In all embodiments, it is obvious that, since the laminate is placed between the structural paper, a firm connection of the structural paper to the pressing device or the heating plates is not given.

From the disadvantage of the DE 42 10 062 A1 known method is that a defined structuring of the surface of the laminate is difficult. First of all, it is difficult in the known method to ensure a defined arrangement of the structured paper to the laminate. The slightest inaccuracies in the arrangement between structural paper and laminate result in the fact that structuring in the product does not correspond to the desired result. In addition, the preparation of the laminated layers of structural paper and laminate to be pressed is comparatively time-consuming, which adversely affects the production speed.

task It is therefore a pressing device of the present invention to provide the type mentioned above, at the good and repeatable pressing results are achieved and the otherwise a high production speed guaranteed.

This object is achieved in a first alternative according to the invention in that a clamping device is provided for planning and wrinkle-free investment of the structure paper on a pressing surface. The inventive design ensures that the structure paper is applied to at least one pressing surface of the pressing device during the pressing operation, in such a way that the structure paper throws no wrinkles. Ultimately results in a defined and safe investment of the structure paper at the respective pressing surface, which in turn has a defined, good and above all repeatable pressing result. In addition, the tensioning device which is provided for tensioning the structured paper has the consequence that when a structural paper is used for a plurality of pressing operations, any elongation of the structural paper which may occur can be compensated by an automatic or automatic tensioning. In this way, the pressing result does not suffer from one multiple use of the textured paper, which ultimately not only has a cost effective, but also reduces the production time per component.

at an alternative embodiment of the present invention, in particular in combination with the previously described Offers clamping device is a holding device for mounting of the structural paper before, during and after the pressing process provided on at least one pressing surface. The Holding device provides the same advantages as the result previously described tensioning device, so that reference thereto can be taken. Ultimately, by the holding device a defined arrangement of the structure paper before, during and after the pressing process ensured what the production Overall simplified, the production time shortened and a ensures defined press results.

Both the realization of the clamping and the holding device make a significant difference to that of the DE 42 10 062 A1 known device, since in the invention, the structure paper abuts in any case immediately before pressing directly on the respective pressing surface and is not arranged in a loose layer composite with the laminate in the space between the pressing surfaces.

at a preferred embodiment of the present invention are the clamping and / or holding device on the upper heating plate fixed and movable together with the upper heating plate. By the assignment of the clamping and / or holding device to the upper heating plate and their attachment to it will ensure that by the movement of the upper heating plate after the pressing process the structural paper from the component triggers and the component out the pressing device can be moved out while the textured paper on the pressing surface of the upper Heating plate remains and then for the next pressing operation can be used. Furthermore is determined by the assignment of the clamping and / or the holding device To the top hot plate ensure that the textured paper too on the movement of the heating plate safely remains on this, itself So no unwanted misplacement results. About that In addition, the invention offers the advantage that a clamping and / or holding device readily subsequently also can be attached to a known pressing device, so that the invention by appropriate retrofitting also can be used in known pressing devices.

Especially for retrofitting already existing pressing devices with the clamping and / or holding device according to the invention it is advantageous for the attachment of the aforementioned devices Use transport bores, which are usually anyway are provided on the heating plate. Such holes are at the Heating plate therefore provided to the heating plate at all transport and install. A boring of the heating plate for the preparation of mounting holes is indeed fundamental possible, but does not pose a significant risk as it damages the inner channels and thus leakage of the heat transfer medium, in particular of thermal oil or water inside the Heating plate is provided, could come.

Around to ensure a secure mounting of the structure paper, the holding device has an inlet-side front holding device and / or an outlet-side rear holding device. Prefers are holding devices both at the front and at the rear Provided end of the pressing device. The holding device should at least two preferably over the entire width of the Heating plate extending holding parts for frictional and / or positive Have support of the structure paper. These holding parts should be relatively movable, which is done manually or automatically can. This allows easy clamping and clamping of the structure paper be ensured in the holding device. As are the holding parts preferably over the entire width of the pressing device will be a wrinkle-free and plan-based concern and the rest in conjunction with the jig a uniform Applying the tensile force ensured on the textured paper.

at In a preferred embodiment, the holding device has a Holding beam and an angular cross-section, in particular L-shaped or round profile-like holding receptacle. to secure holder then moves the retaining bar in the holding receptacle a, so that a frictional and / or positive locking and thus a secure fixing of the structural paper.

Around a possible tearing of the partially used several times To avoid structural paper is at least one rounded deflection, in particular a deflection roller, between the holding device and the heating plate provided. The diversion ultimately ensures that that the structural paper between the holding device, the usually above the plane of the upper pressing surface is located, and the upper press surface not s.alleig sharp edges.

It is particularly advantageous if the clamping device has at least one clamping device connected to a holding means. This has the consequence that the holding device is moved together with the structural paper held by the clamping device. tensioning device and holding device thus ultimately form a common unit, which ensures both the functions of the holder and the clamping of the structural paper.

There, As has been found in experiments, the textured paper due the temperatures occurring during pressing at lengthened multiple use, the clamping device is preferred designed such that an automatic retightening of at least 10 mm, preferably up to 400 mm possible is. To ensure this, is at a preferred embodiment provided that the Clamping device has at least one clamping cylinder. in this connection it is ultimately a cylinder-piston assembly at the clamping is done linearly. Leave a clamping cylinder in a simple manner, for example by means of a corresponding Holder, attach to the upper heating plate, with the holding device in turn, fasten in a simple manner at the lower end of the clamping cylinder leaves.

at In an alternative embodiment, the clamping does not by a linear movement but by a rotary motion generated. For this purpose, the tensioning device then has at least one and / or output side, driven winding device on. The winding device is a motor-driven Roll used to tension the structure paper. In this Connection, it is particularly appropriate if the holding device is provided on the winding device. So can be driven on the Roll of the winding device, for example, an optionally closable Be provided receiving slot for the structural paper. When using two driven winding devices understands it is that these are driven in different directions are to be able to stretch the structure paper.

Around to ensure a defined clamping, the inventive a measuring device for measuring the over the clamping device tensile force applied to the structural paper. In this context It is particularly appropriate, one with the measuring device coupled control device for setting a predetermined, to provide tensile force acting on the structural paper. It understands it turns out that the control device in turn with the clamping device or the respective clamping device is coupled.

About that In addition, it may offer a measuring device for measuring the planned layout of the structural document. You can do this For example, proximity sensors are used. It can the Be coupled measuring device with a display device, the optically and / or acoustically a non-planar system of the structure paper displays. This measuring device can with the control of Pressing device be coupled such that at Structure paper non-planner plant the production process automatically can be interrupted.

The inventive design allows as a result, components using individual structural paper sheets manufacture. The production of small series of components is This makes it relatively easy and inexpensive with short production times possible.

in principle but it is also possible, not just single sheets but also on structured paper stored on rolls, whose length a multiple of an arc, but to use this only in connection with the previously described embodiment of wrapping equipment. In this case, one is on a winding device Rolled stored structured paper provided, in which case on the opposite winding device after a Plural of pressing operations no longer usable Structure paper is wound up.

Further Features, advantages and applications of the present Invention will become apparent from the following description of exemplary embodiments based on the drawing and the drawing itself. It shows

1 a schematic side view of a first embodiment of a pressing device according to the invention,

2 a schematic side view of a second embodiment of a pressing device according to the invention and

3 a schematic side view of a third embodiment of a pressing device according to the invention.

In 1 is a pressing device 1 for the production of flat, not shown components having at least one structured surface. In the pressing device 1 it may be, for example, a KT press, HPL press or a veneer press.

The component to be pressed and structured may be, for example, a laminate or a laminate plate which is produced by pressing and bonding at least two layers of the same or different materials. To obtain a laminate plate, for example, resin-impregnated papers are pressed together under pressure and temperature. As resins are usually melamine, urea and phenol Har ze used. For a high-quality decorative laminate, as z. B. is used in laminate flooring, for example, the following layers are used: The core consists of several impregnated with phenolic resin papers. Above is a melamine resin impregnated decorative layer. At the top, a so-called overlay is pressed, which consists of a transparent, impregnated with melamine resin paper in which a corundum layer may be included. On the underside of the laminate, a counter-pull is provided to prevent bending of the finished laminate during its production.

In the laminate production, a distinction is usually made between two methods which can also be realized in the present invention. In one method of preparation papers in the format of up to 5.3 m × 1.3 m at up to 200 ° C with a pressure of up to 80 N / cm ^{2 are} compressed. The resulting laminate is called HPL (High Pressure Laminate). It is of very high quality and durability. The manufacturable strengths are virtually unlimited. In order to be able to produce larger formats, resin-impregnated papers which are unrolled from a roll are continuously passed through a press and pressed. The resulting laminate is called CPL (Continuous Pressure Laminate).

HPL and CPL laminate boards are used in further processing, for example to laminate floors, furniture panels or worktops on a base body of a carrier material reared. The carrier material may be solid wood, a wooden material, plastic or a composite material Wood and / or plastic act.

About that In addition, it may be in a component in the context of the invention to a preferably directly coated plate-shaped Acting base body, being used as a support material of the main body solid wood, wood materials, plastics or composites of wood and / or plastic are used can. The main body is used in such components in consecutive document stations first with a decorative paper, possibly an underlay and at the utmost Where appropriate, an overlay coated. On the bottom of the main body can be arranged a return. return, Base, decor paper, underlay and overlay, if applicable are pressed together in a pressing device to form a component. When obtained by such a direct coating components can for example, flooring and furniture panels or act around countertops.

It is understood that the layer structure of the component according to the invention is not limited to said layers, neither in terms of the number of layers nor with respect to their arrangement. It is essential, however, that the component at least one with a structure paper 12 having a textured surface in a pressing operation.

The illustrated pressing device 1 has a lower heating plate 2 and an upper heating plate 3 on. The bottom heating plate 2 is stationary, with a press pad on its upper side 4 and then again a lower press plate 5 are provided. The top of the lower press plate 5 forms the lower pressing surface. The upper heating plate 3 is via appropriate stamp 6 movable in the vertical direction. On the underside of the upper heating plate 3 there is a press pad 7 and then again an upper press plate 8th , The underside of the upper press plate 8th forms the upper pressing surface. In the illustrated state, the upper heating plate is located 3 in the open position, leaving a gap 9 between the upper press plate 8th and the lower press plate 5 results. For pressing a component in the space 9 from the inlet side 11 fed and after pressing on the outlet side 10 dissipated. To transport the component in the pressing device 1 into, for placing the component on the lower press plate 5 and for transporting the component from the intermediate space 9 out serve known from the prior art, not shown slide.

The rest is in the space 9 and specifically immediately adjacent to the upper press plate 8th whose underside forms the upper pressing surface, a textured paper 12 , The structure paper 12 In the present case, it has only one structured side, that of the lower pressing surface, and thus the upper side of the lower press plate 5 is facing.

The pressing device 1 Incidentally, in all embodiments, a clamping device 13 on, for planning, wrinkle-free and gap-free installation of the structure paper 12 at the upper pressing surface of the upper press plate 8th the upper heating plate 3 serves. The clamping device 13 As a result, it ensures that the textured paper 12 permanently under a predetermined, depending on the paper type and the operating conditions voltage is the flat and wrinkle-free investment of the structure paper 12 guaranteed. Otherwise, the pressing device 1 a holding device 14 on that the textured paper 12 permanent and defined during operation stops. This defined holder or attachment of the structure paper 12 is present during and after the pressing process.

In all embodiments, it is such that the tensioning device 13 and also the holding device 14 on the upper heating plate 3 attached and are movable with this. Because of this circumstance takes place during the movement of the upper heating plate 3 no relative movement to the structure paper 12 instead of.

The holding device 14 points to the outlet side 10 a rear holding device 15 on, while inlet side, a front holding device 16 is provided. Each of the two holding devices 15 . 16 In the present case has two holding parts, which in the present case for frictional retention of the structure paper 12 are provided. It is understood that the holding parts can also be provided for positive retention. Moreover, the two holding parts extend over the entire width of the heating plate, that is, the inlet side 11 on the one hand and the outlet side 10 on the other hand, so that a secure mounting and attachment of the structure paper 12 is given over its entire width. Moreover, although this is not shown, the holding parts are movable relative to each other, so that an opening of the respective holding device 14 . 15 is possible. Specifically, each of the holding devices 15 . 16 a retaining bar 17 and a cross-sectionally angular holding receptacle 18 on. In the illustrated embodiment are between the holding beam 17 and the holding receptacle 18 chuck 19 provided, which are present manually clamped. It is understood that the clamping means can also be operated automatically.

Moreover, there is both inlet and outlet side between the respective holding device 15 . 16 and the respective end of the upper press plate 8th a rounded deflection, in the present case in the form of a pulley 20 ,

The tensioning device 13 indicates at the in 1 illustrated embodiment, a clamping device 21 on, the present output side is provided, but in principle could also be provided on the input side. The clamping device 21 is present with the rear holding device 15 firmly connected. Here is the clamping device 21 designed so that an automatic retightening of at least 10 mm, preferably even up to 400 mm is possible. As the holding device 15 with the clamping device 21 is coupled, is when tightening the clamping device for tensioning the structure paper 12 the holding device 15 moved.

Im in 1 illustrated embodiment, the clamping device 21 several clamping cylinder over which a linear clamping movement can be realized. The individual clamping cylinders can be operated electrically, pneumatically or hydraulically.

The rear holding device 15 and the front holding device 16 are each frontally with the upper heating plate 3 screwed. For this serve transport bores 22 , anyway the front side of the upper heating plate 3 are provided. In the transport hole 22 are then bolts 23 screwed in to attach the respective devices to the upper heating plate. At the in 1 illustrated embodiment, the output-side clamping device on a linkage 24 attached, which is bolted to the front side with the upper heating plate.

In the in the 2 and 3 embodiments shown are provided on the inlet and outlet side designed as a winding device clamping devices. These are each driven rollers, on which the textured paper 12 is attached. The driven rollers are each driven against provisionally to allow a clamping. Moreover, it is understood that in the in the 2 and 3 illustrated embodiments, the respective holding device 15 . 16 is provided directly on the driven rollers of the winding device.

Incidentally, it goes without saying that it is basically possible without further ado, the output-side clamping device in the embodiment according to 1 through a clamping device 21 at the outlet side of the pressing device 1 at 2 is provided to replace, while otherwise the inlet-side holding device 16 corresponding 1 preserved. It is also possible in the 1 illustrated inlet-side holding device to be realized on the output side and the input side in 2 provided clamping device.

It is not shown that in all embodiments, a measuring device for measuring the force applied to the tensioning device on the structure paper tensile force or tension can be provided as well as a coupled control device to even with a possibly occurring during operation elongation of the structure paper a sufficient investment to the upper pressing surface and tensile stress of the structure paper 12 to ensure. Furthermore, a measuring device may be provided, which is the planar system of the structure paper 12 at the upper pressing surface, independently of the aforesaid measuring device.

The embodiments of the 1 and 2 on the one hand and 3 On the other hand, on the other hand, differ in that in the embodiment according to the 1 and 2 only a single sheet of textured paper 12 is provided. This is ultimately held in different ways and tense. In contrast, it is in the embodiment according to 3 so that rolled-up, stored structure paper is provided, which is unwound from the one winding device and is rewound from the other winding device after use. It is irrelevant whether the roll with the still unused textured paper 12 is provided on the input or output side.

1

pressing device

2

lower heating plate

3

upper heating plate

4

A press pad

5

lower press plate

6

stamp

7

A press pad

8th

upper press plate

9

gap

10

outlet side

11

inlet side

12

Textured paper

13

jig

14

holder

15

rear holder

16

front holder

17

support beam

18

holding receptacle

19

chuck

20

idler pulley

21

chuck

22

conveying hole

23

screw

24

linkage

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4210062 A1 [0004, 0005, 0006, 0010]

Claims (19)

Pressing device ( 1 ) for the production of sheet-like components with at least one structured surface, with an upper, an upper pressing surface having heating plate ( 3 ) and a lower, a lower pressing surface having heating plate ( 2 ), whereby structural paper ( 12 ) is provided between the pressing surfaces, characterized in that a clamping device ( 13 ) for the plan and wrinkle-free installation of the structural document ( 12 ) is provided on at least one pressing surface. Pressing device ( 1 ) for the production of sheet-like components with at least one structured surface, with an upper, an upper pressing surface having heating plate ( 3 ) and a lower, a lower pressing surface having heating plate ( 2 ), whereby structural paper ( 12 ) is provided between the pressing surfaces, characterized in that a holding device ( 14 ) for holding the structure paper ( 12 ) is provided before, during and after the pressing operation on at least one pressing surface. Pressing device according to claim 1 or 2, characterized in that the clamping device ( 13 ) and / or the holding device ( 14 ) on the upper heating plate ( 3 ) and with the upper heating plate ( 3 ) are movable. Pressing device according to one of the preceding claims, characterized in that the holding device ( 14 ) an inlet-side front holding device ( 16 ) and / or an outlet-side rear holding device ( 15 ) having. Pressing device according to one of the preceding claims, characterized in that the holding device ( 15 . 16 ) two preferably over the entire width of the heating plate ( 3 ) extending holding parts for friction and / or positive retention of the structure paper ( 12 ) having. Pressing device according to one of the preceding Claims, characterized in that at least a holding part is movable relative to the other holding part. Pressing device according to one of the preceding claims, characterized in that the holding device ( 15 . 16 ) a holding bar ( 17 ) and in cross-section angled or round profile-like holding receptacle ( 18 ) having. Pressing device according to one of the preceding claims, characterized in that between the holding device ( 15 . 16 ) and the heating plate ( 3 ) at least one rounded deflection, in particular a deflection roller ( 20 ) is provided. Pressing device according to one of the preceding claims, characterized in that the clamping device ( 13 ) at least one with a holding device ( 15 . 16 ) connected tensioning device ( 21 ) having. Pressing device according to one of the preceding claims, characterized in that the clamping device ( 21 ) is designed such that a retightening of at least 10 mm, preferably up to 400 mm is possible. Pressing device according to one of the preceding claims, characterized in that the clamping device ( 21 ) has at least one clamping cylinder. Pressing device according to one of the preceding claims, characterized in that the clamping device ( 21 ) has at least one on and / or outlet side arranged, driven winding device. Pressing device according to one of the preceding claims, characterized in that the holding device ( 15 . 16 ) is provided on the winding device. Pressing device according to one of the preceding claims, characterized in that for fastening the clamping device and / or holding device to the upper heating plate ( 3 ) Transport bores of the upper heating plate ( 3 ) serve. Pressing device according to one of the preceding claims, characterized in that a measuring device for measuring the on the tensioning device on the structure paper ( 12 ) applied tensile force is provided. Pressing device according to one of the preceding claims, characterized in that a control device coupled to the measuring device for setting a predetermined position on the structural paper ( 12 ) acting tensile force is provided. Pressing device according to one of the preceding claims, characterized in that a measuring device for measuring the planar arrangement of the structure paper ( 12 ) is provided on the upper pressing surface. Pressing device according to one of the preceding claims, characterized in that a textured paper ( 12 ) is provided in the form of a single sheet. Pressing device according to one of the preceding claims, characterized in that a stored structure paper rolled up on a winding device ( 12 ) is provided and that, preferably, the opposite winding device for winding the used structure paper ( 12 ) is provided.