WO1997035709A1

WO1997035709A1 - Coating press

Info

Publication number: WO1997035709A1
Application number: PCT/DE1997/000544
Authority: WO
Inventors: Heinrich WEMHÖNER; Christian Linhorst; Ludwig Müsse
Original assignee: Heinrich Wemhöner Gmbh & Co.Kg Maschinenfabrik
Priority date: 1996-03-25
Filing date: 1997-03-18
Publication date: 1997-10-02
Also published as: ITMI20000031A0; DE19611754C2; DE19611754A1

Abstract

To coat panel-shaped workpieces with a film, a coating press is provided. Positioning of the workpieces on the support table, independently of a pre-calculated layout pattern and the workpieces delivered thereto, can be simplified and quickened to a large extent in that the support table (1) has a table top with grid-like openings (3) into which carriers (7, 27) for the workpieces (2) are displaceably inserted. At least the length of each carrier (7, 27) can be easily changed to be reversible in such a manner that inside the coating press the extended carriers (27) positioned on the contact surface project up from the table top and the workpieces (2) mounted on said carriers are raised in relation to the surface of the table top and the shortened carriers (7) which are not or only partially covered.

Description

B e s c h i c h t u n g s p r e s s e

The invention relates to a coating press according to the preamble of the main claim. In order to coat flat workpieces such as furniture building boards with film on one side and all edges at the same time, presses are used in which the workpieces are placed on a lower press plate on substrates set back relative to their edge so that the film fed from above can lay on the front and around the edges of the workpiece with the aid of overpressure from above and / or underpressure from below. For each workpiece there must therefore be a suitable base which is kept in stock and must be available at short notice Furthermore, these documents must be put on by hand and the work piece must be aligned with it, which means unnecessary working time and effort and possible sources of error. A press with a support system for plate-shaped work pieces is known (DE 295 00 248), at which corresponds to a previous one The given occupancy pattern of support plugs for the workpieces from receiving holes in a plug-in plate can be used from above in the plug-in holes arranged next to them in order to be able to place a workpiece thereon and to be lifted relative to the plug-in plate. A disadvantage of such a support system is that for each pressing process based on the delivered workpieces, an assignment picture must be calculated. If, for example, it is found in front of the press that a still uncoated workpiece is missing or defective, it can only be exchanged for a workpiece of an identical size. This is often not possible because the warehouse and production are spatially separated, so that waiting and downtimes occur. Placing smaller workpieces is forbidden, because then free support plugs could have prevented complete coating of the side surfaces. When placing a larger workpiece there is a risk that the workpiece will not be out is adequately supported from below and free areas break off in the press due to the high surface pressures that occur

It is therefore an object of the invention to provide a press for multi-sided film coating, in which the laying of the table with workpieces is independent of a pre-calculated occupancy pattern and the delivered ones

REPLACEMENT BLAπ (RULE 26) Workpieces can be simplified and accelerated Furthermore, the largest possible support area of the workpieces should be retained in order to minimize the risk of breakage

The solution of this task according to the invention results in connection with the preamble features from the characterizing part of the main claim. The carriers used in the through openings of the table top, which can advantageously be designed as a grating or as a plate with grid-shaped recesses, can be changed in length so that in the extended state they are longer than the tabletop thick, so that when the tabletop is placed on a flat support surface, in particular on the lower press plate, they protrude upward from the tabletop, as a result of which the workpieces lying on them are raised, only being lengthened such carriers, which are completely covered with a workpiece, so that it is ensured that all edges of the workpiece and part of the lower back are exposed in the edge area and a film on the front, the edges and slightly over a narrow edge area of the back g can be pulled or pressed

The solution according to the invention means that there is no need for documents of different sizes for workpieces of different sizes, since the base is now composed of many small carriers that are permanently present in the laying table and that only need to be activated, ie extended, when necessary. which are not or only partially covered with a workpiece, remain or are shortened

It is also advantageous that the laying table can be freely occupied with workpieces in any arrangement without the laying sheet having to be calculated beforehand, since the length adjustment of the supports only takes place after the laying. Nevertheless, the use of a computer is not excluded, so that also with a calculated, optimized laying plan can be worked, the supports being able to be set before covering. In a particularly preferred embodiment of the invention, the supports are each provided with an upper support plate, which is larger than a passage opening and which has Its underside rests on the top of the table. The support surface for the workpieces is thus significantly increased

REPLACEMENT BLAπ (RULE 26) aligned The corners themselves are either very rounded or provided with a larger chamfer, so that even when the supports or support plates lie close together, an area of the table top delimited by the supports or by the edges of the support plates remains free. This free area can preferably be can be used to arrange sensors or parts thereof in the underlying opening in the laying table, such as windows or lenses for light penetration or that it is used as a free measuring opening to overlay a workpiece via an optical distance measurement Detect The change in length of a carrier can be done manually, partially or fully automatically. It can be technically generated in many ways, for example in the case of a carrier consisting of two bolted together carrier parts by screwing in or unscrewing a part, in other two-part carriers by clamping slide in unfolding, telescoping, etc. With a one-piece, for example cuboid-shaped support, a change in height can also be achieved simply by repositioning or placing on another side surface. Such an effect can furthermore be achieved in that a one-piece support can be pivoted about an axis of rotation which is spaced differently from two flat support surfaces for the workpieces. According to the preferred embodiment, a rocker is articulated on the support, at the end of which an extension piece is attached such that it can be pivoted from a position to the side of the support into a position below the support, in which rests extensively on the lower end face of the carrier and mechanically extends it mechanically in vertical pressure. It is advantageous if the swivel axis has so much radial play in the carrier that the pressing force of the press is not via the joint, but rather positively from the extension piece is transferred to the carrier

On the underside, the extension piece of a first embodiment of the invention to ensure and improve its function has a catch which interacts with the catch of a driver. In one embodiment of the invention, this driver is advantageously arranged on a measuring carriage of a set-up station, which is below the tray carriage is arranged displaceably, the driver via an adjusting means designed as a lifting cylinder, the driver arm

SPARE BLÄπ (RULE 26) can raise or lower. In the raised state, the catch of the driver engages in the catch of the extension piece in such a way that when the measuring carriage moves further, the extension piece is pivoted about an articulation on the carrier from an approximately horizontal position next to the carrier into a position perpendicularly below the carrier. This type of extension of the carrier is mechanically very simple and therefore very robust and extremely stable and resistant to the vertical pressure forces that occur. Resetting, shortening the straps, is carried out by simply pivoting the extension pieces back, for example by means of a bar which is moved along under the table top and moves the extension pieces back in their positions next to the straps.

In this preferred embodiment of the invention, the measuring carriage is provided with a measuring wheel serving as a displacement sensor, which rolls below the table top on the latter. Furthermore, the measuring trolley is equipped with sensors pointing upwards, which can detect workpieces lying on the supports through the free areas or windows in the table top. The size of the workpiece can also be recognized in connection with the displacement transducer. The detection takes place preferably via light-sensitive sensors and a light source above the table top, via infrared distance measurement or in other known ways. In a further preferred second embodiment of the invention, a display and set-down table is arranged under the laying table, which can either be raised in a position in which all extended supports can be raised to control the function or the laying pattern, or in a laterally offset position can be raised and lowered, the magnetic tracks arranged on it line by row attracting the extension pieces of the supports provided with perforated metal sheets and folding them over into an extended starting position. The swiveling back can then either take place again via a measuring carriage or via a permanently mounted measuring device, via which the laying table moves on the way into the press. It is particularly advantageous if the carrier plates of the carriers are thicker than the extension pieces, since then no gap is created between two adjacent and differently long carriers, but only a shoulder. This enables the simulation of so-called areas not covered with workpieces

REPLACEMENT BLAπ (RULE 26) Clamping strips, which are also placed under the press in some workpiece molds to stretch the film and which then have to be removed again and freed from the film for further use. Another advantage is that a large number of older presses can be used with the inventive laying table and such a device does not necessarily have to be arranged underneath the table top, it could just as easily recognize workpieces from above. Furthermore, the press can be connected to a computer that calculates optimized occupancy images or even via a assigned workpiece feeder fully automatic occupancy of a table It is also possible to switch off the extension of the supports in sectors, in order to conventionally cover such a sector with documents underneath the workpieces, which is required for complicated workpiece shapes An advantageous further development of the inventive way of supporting workpieces in continuously operated presses is also conceivable

Two exemplary embodiments of the invention are described in more detail below with the aid of drawings

1 is a side view of a first embodiment with a laying table in a press, in section,

Fig. 2 is a side view of a set-up station of the first embodiment in section

3 is a top view of an occupied laying table in a partial view,

4 is a side view of a measuring trolley with measuring wheel,

Fig. 5 is a side view of a second embodiment with a laying table in a press in section and

6 shows a side view of a set-up station of the second embodiment

The coating press has an upper press plate 10, 40 and a lower press plate 11, 41, which serves, inter alia, as a support surface for the laying table 1, 31 and the support 27, 57 extended by the extension piece 17.47. The laying table 1 is a first

Embodiment has a table top designed as a grating 4 with through openings 3, which is composed of supporting bars 5 and full bars 6. In every second through opening 3 of the grating 4, a carrier 7, 27 is inserted, which in

REPLACEMENT BLAπ (RULE 26) this through-opening is vertically movable, and which is shorter in its shortened rest position than the grating 4 thick and which in its extended version protrudes beyond the contour of the grating 4

The laying table 31 of a second embodiment has a table top with through openings 33 designed as grid-shaped recesses, which essentially correspond to the cross-sectional shape of the carrier and each have a lateral groove into which a tongue projecting over the contour of the carrier 37, 57 is inserted 43 extends, which holds the extension piece 47 in the set position. On the other hand, the groove ensures the proper installation of the supports in the table 31

The support 7, 27, 37, 57 has on its upper side an enlarged support plate 8,38, with the back of which it is outside the press, and in a shortened version also in the press, on the surface of the grating 4 or the laying table 1, 31 The top of the carrier plates 8, 38 serves as a large support surface for the flat workpieces 2, 32 to be coated, such as furniture building boards, furniture doors, etc

Furthermore, an extension piece 17.47 is articulated on the carrier 7, 27, 37, 57 via a rocker 16, 46, which in the rest position is pivoted next to the shortened support 7, 37 in the first embodiment The construction of the grating 4 is made available, which is composed, as usual, of supporting bars 5 and full bars 6, the supporting bars 5 having the height of the grating 4 and the full bars 6 arranged in the area of the surface, however, having only a fraction of the height of the grating 4, so that there is sufficient space for the extension piece 17. In the second embodiment, this is ensured by the coordinated dimensions of the laying table 31, through openings 33, supports 37, 57 and extension pieces 47. In the extended version of a support 7.27, 37.57 the extension piece 17.47 is pivoted under the extended support 27.57, so that both parts are large g abut each other and the original lower contact surface is approximately preserved. In the contact surface of the first embodiment, a catch in the form of a recess 21 is incorporated, which interacts with a catch 22 designed as a catch on the driving arm 15 of the measuring carriage 20 in the contact surface and the surface of the extension piece 47 of the second embodiment, which faces downward in the shortened state, sheet metal strips are arranged, which have a magnet

REPLACEMENT BLAπ (RULE 26) under the laying table 31 arranged display and backpack table work together

In a set-up station in front of the press, to which the table 1, 31 covered with workpieces 2.32 is moved, a measuring carriage 20, 50, which can be moved in parallel with the table top and is arranged with the top facing, is arranged below the table 1, 31 Sensors 14, 44 are provided. These sensors 14, 44 are directed through the passage openings 3 of the grating 4 or the table top 31 to the areas not covered, in particular to the free areas 19 between the corners of four adjacent support plates 8, 38, in which transparent windows 13 or lenses are arranged

The sensors 14, 44 of the two exemplary embodiments are designed as light-sensitive photo cells, which react to the incidence of light from a light source arranged above the set-up station. An on-site workpiece 2, 32 hinders this incidence of light, which is registered by a connected measuring device if all of them have an individual carrier plate 8.38 surrounding sensors 14.44 do not register any incidence of light, it is ensured that this carrier plate 8.38 is completely covered by a workpiece 2.32, so that the associated carrier 7.27.37.57 can be extended or can be extended If only one sensor 14, 44 of all sensors 14, 44 surrounding a carrier 7, 27, 37, 57 detects an incidence of light, the carrier 7, 27, 37, 57 remains or is shortened

A lifting cylinder 18, 48 is arranged on the measuring carriage 20, 50 and can act on the entraining arm 15, 45 in such a way that it is pivoted from a lowered rest position into a raised position in which its catch 22 in a recess 21 of an extension piece 17 in the rest position can engage, so that when the measuring carriage 20 moves further beneath the table top, the extension piece 17 is taken along and pivoted about the pivot axis of the rocker 16 into a position that extends the carrier 7, 27 In the second embodiment, the extension pieces 47, which have all been brought into an extended position by the magnets in the display and backpack table, are pivoted into a shortened position by the raised driver arm 45

REPLACEMENT BLAπ (RULE 26) In a further version, not shown in the drawing, the measuring carriage can be replaced by a fixed measuring device, via which the laying table 31 is guided on the way into the press, so that a separate set-up process is omitted. In the case of a press plate that is retracted and onto the lower press plate 11 , 41 lowered table 1, 31, the supports 27, 57 extended by the extension pieces 17.37 stand on the press plate 11, 41 and raise the workpieces 2.32 on the table to a desired value, so that the Coating film 9 using positive pressure from above and / or negative pressure from below to the front to the edges and slightly to the back of the workpieces 2,32 or let

REPLACEMENT BLAπ (RULE 26)

Claims

P a t e n t a n s r u c h e

1 coating press for multi-sided film coating of furniture building boards with a table that can be moved into the coating press on a tray trolley with workpieces to be coated and a support surface of the lower press plate arranged under the inserted table, characterized in that the laying table (1, 31) is a table top with grid-shaped passage openings (3) into which supports (7, 27, 37, 57) for the workpieces (2, 32) are movably inserted, each support (7, 27, 37, 57) being reversible in length at least once is so changed that within the coating press the extended supports (27, 57) standing on the support surface protrude upward from the table top, so that the workpieces (2, 32) supported on them face the surface of the table top and not or only partially covered shortened supports (7,37) are raised 2 coating press according to claim 1, characterized in that a support er (7,27,37,57) is provided with an upper support plate (8,38) which is larger than a through-opening (3,33) and which with its laying table (1, 31) located outside the coating press the side facing the table top rests on it

3 coating press according to claim 2, characterized in that the carrier plates (8,38) are rectangular, the corners being rounded or chamfered and that

Carriers (7, 27, 37, 57) are arranged in the table top in such a way that the support plates (8, 38) form a flat surface with the corners to one another and with play side by side, one of four support corners at least in the area of the corners bounded free area (19) of the table top and the underlying opening (3,33) is not covered

4 coating press according to one of the preceding claims, characterized gekenn¬ characterized in that in the free area (19) of the table top around the support (7,27,37,57) or around the support plates (8,38) sensor means or parts thereof are arranged , with the help of which workpieces (2, 32) lying on the table top, the supports (7, 27, 37, 57) or the support plates (8, 38) can be detected

5 coating press according to claim 4, characterized in that the sensor means or parts of the sensor means windows (13) are arranged in the table top

REPLACEMENT BLAπ (RULE 26) 6. Coating press according to one of the preceding claims, characterized gekenn¬ characterized in that an extension of a shortened carrier (7.37) to an elongated carrier (27.57) is done manually, partially or fully automatically.

7. Coating press according to one of the preceding claims, characterized in that on the carrier (7, 27, 37, 57) an extension piece (17.47) over a

The rocker (16, 46) is articulated in such a way that it can be pivoted into a position below the carrier (27, 57) so elongated and a lateral position of the carrier (7, 37) thus shortened.

8. Coating press according to claim 7, characterized in that the extension piece (17,47) has a latching means on which, during the extension process, a latching means of a driving arm (15, 45) acts temporarily.

9. Coating press according to one of the preceding claims, characterized in that optical, electrical or mechanical sensors are used as sensors (14). 10. Coating press according to one of the preceding claims, characterized gekenn¬ characterized in that the detection on the table top workpieces (2) with subsequent extension of the shortened carrier (7) and / or a reset extended carrier (27), in sectors divided table top, can be switched off in sectors. 11. Coating press according to one of the preceding claims, characterized gekenn¬ characterized in that it is connected to a computer that calculates the optimized occupancy image or recognizes existing occupancy images by means of sensors and that determines the shortened carrier (7) to be extended in the set-up station.

12. Coating press according to claim 11, characterized in that the occupancy of the laying table (1) with a device connected to the computer

Workpieces (2) is automatically executable.

13. Coating press according to one of the preceding claims, characterized gekenn¬ characterized in that the carrier plate (38) of a carrier (37,57) is thicker than the extension piece (47) high and the stroke of the carrier (37,57) large . 14. Coating press according to one of the preceding claims, characterized gekenn¬ characterized in that a device is arranged in a loading station under the tray carriage of the laying table (1), which has sensor means or parts of sensors (14), with the help of which on the table top or Workpieces (7.27) lying on top

REPLACEMENT BLAπ (RULE 26) (2) it can be detected that the device can be moved parallel underneath the tray trolley and that a driver arm (15), which can be positioned by means of adjusting means, is arranged on the tray trolley, by means of which it is articulated laterally via a rocker (16) on the carrier (7, 27) Extension piece (17) when a workpiece (2) lies completely on the support (7, 27) or the support plate (8) can be swiveled under the support (27) thus extended

15 coating press according to claim 14, characterized in that the driving arm (15) is arranged in the direction of movement of the device in the front, extending rearward, and at the end has an upward-looking latching means that the adjusting means consists of a lifting cylinder (18) , which engages the entraining arm (15), which can be moved from a lower position to the height of the extension piece (17), so that this during the further movement of the device and brief locking of the latching means of the entraining arm (15) with the Locking means of the extension piece (17) can be pivoted downward from its lateral rest position

16 coating press according to claim 14, characterized in that the Vor¬ device is installed on a measuring carriage (20) which is movable on a linear unit below the tray carriage and which has a measuring wheel, the circumferential shape of which is adapted to the shape of the underside of the table top, the device is equipped with sensors (14), with the aid of which sections of the table top not covered with workpieces (2) can be recognized simultaneously or successively through exposed openings (3) or windows (13) in the table top

17 coating press according to one of claims 1-14, characterized in that the latching means consist of magnets and magnetic material. 18 coating press according to claim 17, characterized in that on the extension piece (47) in the area of its contact surface and in the shortened state after A sheet metal strip (34) is arranged at the bottom surface 19 Coating press according to claim 17, characterized in that under the laying table (31) there is a display and backing table which can be moved up and down and which is arranged in columns with magnets with free-standing contact surfaces for them Extension pieces (47) of the extended carrier (57) has

REPLACEMENT BLAπ (RULE 26) 20. Coating press according to one of claims 17 -19, characterized gekennzeich¬ net that it has a measuring device (50) with sensors (44), measuring device (50) and laying table (31) are movable relative to each other and that in the direction of movement behind the sensors (44) a driver arm (45) is arranged on a lifting cylinder (48) which, in a raised position, extends behind the extension pieces (47) and laterally folds them over during a relative movement and shortens the elongated supports (57) .

21. Coating press according to claim 1, characterized in that the carrier is in one piece and has at least two bearing surfaces, which can optionally be aligned with one of the surfaces at different heights parallel to the surface, the carrier protruding in at least one orientation above the table top.

22. Coating press according to claim 21, characterized in that the carrier has at least four parallel surfaces, each arranged in pairs, which are spaced differently apart, in particular as a cuboid, and that it alternately with one of the surfaces parallel to Surface of the table top is adjustable.

23. Coating press according to claim 21, characterized in that the carrier is pivotable about an axis of rotation which is spaced differently from the bearing surfaces.

REPLACEMENT BLAπ (RULE 26)