DE10319432B3 - Press for manufacture of foil-coated flat workpieces with 3-dimensional surface simulating wood, stone or paved floor - Google Patents

Abstract

The press has a press frame (1) and upper and lower press tables (2,3) brought together via pressure cylinders (9), each provided with a press plate (4,5) which is engraved with a relief pattern corresponding to the decorative pattern printed on the foil coating. At least one press plate is adjustable in longitudinal and/or transverse directions relative to the press table.

Description

The invention relates to a press for the production of film-coated flat workpieces with three-dimensional Surface, in particular imitation tiles, stone or wooden floors, from a press frame with an upper press table and a lower press table and one a press plate associated with a press table and facing a workpiece a relief-like and on the surface of the workpiece and surface design matched to the pattern of a coating film.

Such coating presses are in many designs known, but it turns out to be a problem that with a a flat Workpiece with three-dimensional surface coating film to be pressed on with a pattern such as is provided with a tile pattern, even the slightest deviations in position the coating film to the relief-like surface of the press plate already to significant quality losses in finished workpiece to lead can. Such positional deviations are particularly due to the latitude and linear growth a coating film, which is particularly during their Production process, for example in the event of moisture penetration with color, whereby darker colors soak a coating film and to greater growth to lead than lighter colors. Furthermore arise in an impregnation channel to order from first liquid Adhesive or resin in a channel up to 70 m long further dimensional deviations, about different longitudinal expansion, where different batches of the same material or dependent on on the width, thickness or pattern of the starting material can also set different values.

With an average growth tolerance a coating film of ± 0.2% results from a central alignment of the coating film a workpiece 2 m wide on both edges of the workpiece already an error of ± 2 mm, which is also inexperienced Immediately catches the eye since there is an edge of the workpiece and the pattern in this area, so even an inexperienced Eye immediately the mismatch between Pattern and workpiece shape noticeable.

The object of the invention is a Press available to ask who is an embossed Press on a patterned coating film area workpieces with three-dimensional surfaces allows.

This task is solved according to the invention from the Features of the main claim.

The fact that the press plate in relation to Longitudinal press table and / or arranged transversely, can be first the press plate depending the known data of the place of deposit with a coating film occupied workpiece align optimally with this or depending on the type of coating film or the coating paper with different growth rates Set optimized value that leads to a much improved Work result leads.

Useful embodiments of the invention are in the rest dependent claims demonstrated.

According to a particularly preferred embodiment the subject of the invention is the press plate one or more times lengthways and / or across divided into partial press plates, so that they are very wide Coating foils can be applied to workpieces that are just as wide, precisely the growth of the coating film that occurred during production compensated by a suitable alignment of the partial press plates can be.

One embodiment is particularly advantageous of the subject of the invention in the case of a partial pressing plate relative adjustable to an adjacent partial press plate and the other partial press plate after a one-time alignment, the also corresponding to a selected coating film to their samples can be arranged under a press table is, so that the technical effort of constructing such Press keeps clearly within limits.

The use of two partial press plates per press table, which extend over the length of the press table, appears to be particularly advantageous, so that the known clamping devices for press plates only have to be adjusted on one side of the press table to the requirement of adjustability. When it is now possible to influence the position of the partial press plates relative to one another, it goes without saying that the folding device, in which the coating film is placed on the workpiece to be coated, can be appropriately coordinated in such a way that, for example, the edges of a coating film or a pattern do not relevant orientation points are used, but, for example, that the central area of a film strip, which is assigned to a fixed partial press plate of the press, is used as an orientation line and the coating film is correspondingly placed on the workpiece. The parallel partial press plate can then be optimally adjusted to its central area, so that, for example, with a coating film with a known 0.2% growth tolerance and a width of 2 m, the pattern is not one-sided is shifted by 4 mm, but only 1 mm to the outside and inside, whereby workpieces of high and consistent quality can be produced.

With increasing number of partial press plates, the accuracy of the embossing further improve as the design effort increases.

According to an advantageous one embodiment the invention is the clamping device on releasable connecting means on Press table arranged so that a press plate or partial press plates manually by loosening and fixing the connecting means are adjustable, such Lanyards can be screws that have elongated holes in them reach through the clamping device and screw it into the press table are. However, it is also conceivable that the tensioning device is via threaded spindles across from the press table can be adjusted, the adjustment can advantageously take place automatically, be it electrical, hydraulic or pneumatic and the data in dependence the coating film can be entered or the actual Growth of a coating film can be detected and evaluated can.

For this it is a preferred one Design of the invention possible that one with a camera system for position detection of the workpieces or the coating film and possibly with an alignment device of the workpieces or the coating film equipped coating press via a Control computer with an adjustment device for the position the press plates is connected so that they automatically switch on or off while of the work process can be readjusted.

With the present press it is therefore possible the engraving of a press plate is congruent with the decor of a coating film Completely to be congruently stamped on the three-dimensional surface of a flat workpiece.

Below is an embodiment described the invention with reference to the drawings. Show it:

1 a front view of a press,

2 a side view of the press acc. 1 .

3 an enlarged view of the press acc. 1 in a partial view,

4 a top view of two pressed parts with an applied coating film.

The press essentially consists of a press frame 1 with two over press cylinders 9 press tables movable against each other 2 ; 3 made with press plates 4 ; 5 are provided, which have engravings that match the decor of a coating film and a three-dimensional surface of the workpieces to be coated.

How especially out 3 becomes clear; is the left partial press plate 6 fixed, but at least when it is set up, also individually matched in the longitudinal and / or transverse direction to a specific coating film, under a press table 2 or on the lower press table 3 where, on the other hand, the right partial press plate 5 opposite the upper press table 2 or the lower press table 3 is set laterally adjustable. This adjustability is achieved, for example, by means of a threaded spindle 7 generated by the jig 6 of the partial press plate 5 is laterally displaceable. Other technical solutions for the lateral adjustability are conceivable, as are the embodiments of a single longitudinally or transversely adjustable press plate or a plurality of longitudinally and / or transversely adjustable partial press plates which are also adjustable relative to one another and not shown in the drawing.

Claims (10)

Press for the production of film-coated flat workpieces with a three-dimensional surface, in particular of imitations of wood, stone or tiled floors, from a press frame with an upper and a lower press table and a press plate assigned to a press table and facing a workpiece with a relief-like and on the surface of the workpiece and surface design matched to the pattern of a coating film, characterized in that the press plate in relation to the press table ( 2 ; 3 ) adjustable lengthways and / or crossways on the press table ( 2 ; 3 ) is arranged. Press according to claim 1, characterized in that the press plate one or more times longitudinally and / or transversely in partial press plates ( 4 ; 5 ) is divided. Press according to claim 2, characterized in that a partial press plate ( 5 ) relative to an adjacent partial press plate ( 4 ) is adjustable. Press according to one of the preceding claims, characterized in that a press table ( 2 ; 3 ) with two press plates ( 4 ; 5 ) and a partial press plate ( 4 ) fix and a partial press plate ( 5 ) adjustable at the press table ( 2 ; 3 ) is arranged. Press according to one of the preceding claims, characterized in that a press plate or a partial press plate ( 4 ; 5 ) from a clamping device ( 6 ) at the press table ( 2 ; 3 ) and that the tensioning device ( 6 ) opposite the press table ( 2 ; 3 ) is adjustable. Press according to claim 5, characterized in that the clamping device ( 6 ) via detachable connection means on the press table ( 2 ; 3 ) is arranged and a press plate or partial press plate ( 4 ; 5 ) can be adjusted manually by loosening and fixing the connecting means. Press according to claim 5, characterized in that the clamping device ( 6 ) and the press table ( 2 ; 3 ) via threaded spindles ( 7 ) are mutually adjustable. Press according to claim 5, characterized in that the clamping device ( 6 ) automatically, electrically, hydraulically or pneumatically opposite the respective press table ( 2 ; 3 ) is movable. Press according to one of the preceding claims 2 to 8, characterized in that a coating film ( 8th ) occupied workpiece to a first partial press plate ( 4 ; 5 ) is optimally positioned in the press and an adjacent partial press plate ( 4 ; 5 ) to a known or expected width and / or length growth of a coating film ( 8th ) is set relatively spaced from it. Press according to one of the preceding claims 2 to 8, characterized in that it is equipped in front of the press with a system for detecting the position and / or with a system for aligning the workpieces and / or the coating films and a control computer of the press connected thereto with an adjusting device the partial press plates ( 4 ) is coupled and that their alignment can be carried out automatically.