EP0949049B1 - Multi-platen press - Google Patents

Abstract

The press has a frame (1) containing a fixed press table (2) with vertically movable pressing plates (3, 3',3'') above and below and cylinder-piston devices (4, 4'). Mechanical synchronizers are used (5) for vertical guidance of the movable pressing plates. Groups of several piston-cylinder devices above and below the press table are supported by the frame and connected to a pressing plate.

Description

The invention relates to a multi-chamber press, in particular for hot pressing of plate-shaped workpieces made of wood or wood material with glued films, veneer layers and the like, with
Press frame,
a fixed in the press frame press table,
vertically movable press plates above and below the press table,
Cylinder / piston arrangements for the adjustment movement of the press plates and
mechanical synchronization device for the vertical guidance of the movable press plates,
wherein above and below the press table a group of several cylinder / piston assemblies on the press frame or on the press table is firmly supported and connected to a press plate, wherein above and / or below the fixed press table a Pressplattenanordnungen of at least two movable, superimposed pressure plates is provided wherein the fixed press table defines a first press chamber with the adjacent press plate, the two movable press plates form a second press chamber, and the press chambers alternately open and close the press chambers, the movable press plates of the press plate assembly being constituted by a plurality of parallel cylinder / piston assemblies connected to each other. The press table and the press plates can be made heatable. Within the press chambers farting deposits may also be arranged, which are preferably heated and provided with conveyor belts.

From DE 195 17 864 A1 a multi-chamber press of the type described above Art known in the case of the press frame of vertical columns Tables either fixed as fixed press tables or as movable lifting tables are feasible and in which between two such Tables each have a pressure chamber or a pressure chamber is located. The table Consequently, they can either be fixed press tables or mobile ones Lifting tables, the difference being that that in the first case the table is fixed to the columns and in the second case is guided on the columns. The tables have their longer rectangle sides On the outside arranged bearing shells or sleeves, either when using the relevant table as a height-adjustable lifting table the Have function of sliding sleeves or when using the relevant Table serve as a fixed press table as a fastener. The Bearing shells or sleeves have at least if they have the function of Sliding sleeves of a lifting table have such a sufficient length that the Lifting table is to be guided without tilting on the columns, so that others Synchronization systems should be omitted.

In the multi-chamber press known from DE-U 88 06 883 is above and below the press table each have a vertically movable pressure plate provided, which forms a pressing chamber with the press table. The Cylinder / piston assemblies are on crossbeams of the press frame supported and connect to the outer surfaces of the two press plates.

Proper operation requires an exact parallel alignment of the Press plates to the press table during the entire pressing process ahead. The press plates must not be tilted at the pressed material or tilt. To allow a parallel alignment of the press plates to the press table ensure that mechanical synchronizing devices are used in practice. These are mechanical guides that tilt or a Inclined position of the press plates when opening and closing the press chambers prevent.

From EP-B 0 384 958 is a multi-chamber press with several movable Press plates and cylinder / piston assemblies known, the Cylinder / piston assemblies each two movable pressure plates together connect. Through the cylinder piston arrangements are the movable pressure plates chained together. According to this principle, more than two Press chambers are arranged one above the other. Unsatisfactory is the Vertical guidance of the press plates, since mechanical synchronization devices off Space reasons can not be provided.

The invention has for its object to provide a multi-chamber press, with a mechanical synchronization device for the vertical guidance of the movable Press plates is equipped and has more than two pressing chambers.

In a multi-chamber press of the structure described above, the Task according to the invention achieved in that the synchronization device for the vertical guide of the pressure plate assembly only to the fixed press table remote outer pressure plate is connected and that the synchronization device Has gear wheels spaced from each other at the Outside of the outer pressure plate are mounted rigidly coupled by waves and roll on vertical guide racks. It also connects the press plate assembly indicates a group of cylinder / piston assemblies, which are machine-fixed on the press table or supported on the press. Preferably, the machine-supported supported cylinder / piston assemblies work on the press plate adjacent to the fixed press table. The Invention is based on the consideration that a single, to the outer Press plate of the press plate assemblies connected synchronizing device sufficient to a proper vertical guidance of the pressure plate assembly ensure when the press chambers of the press plate assembly be opened and closed in alternating cycles. Is that between The pressing chamber formed the movable pressure plates closed, so form the interposition of the pressed good against each other strained pressing plates a functional unit whose proper parallel alignment to the press table is ensured by the synchronization device. Is that on the first press chamber following the fixed press table is closed, then forms the against the press table with the interposition of the pressed material tensioned press plate a functional unit with the press table. The the associated outer pressing plate synchronization ensures a parallel alignment of the outer pressure plate when opening and closing the between the two press plates formed pressing chamber.

Appropriately, the gears at the ends of two parallel, at the Outside of the press plate mounted pinion shafts arranged, wherein the Pinion shafts via bevel gear arrangements and a clutch shaft with each other are connected.

The mechanical synchronization device is dimensioned so that during the pressing process occurring uneven pressure distributions compensating added can be. If a foreign body enters the press chamber, then there is a risk of overloading and damage to the synchronization device. Therefore, an emergency shutdown is useful if, despite the Synchronization device an inclined position of the press plate during the adjusting stroke established. An emergency shutdown can be set up when the shaft bearings the synchronizing device formed with a split plummer block housing be a lower housing half of the plummer block housing on the Press plate is attached and the Upper half of the plummer block housing against a preloaded Spring arrangement vertically movable at the bottom Housing half is supported. Represents, for. B. due a foreign body that has entered the press chamber, a Oblique position of the press plate, so be on the plummer block housings Effective forces, with the housing halves of a or multiple shaft bearings against the associated preloaded Move the spring assembly. To the upper half of the housing the shaft bearing is connected to a switching device, a in a vertical movement of the upper half of the housing Stop signal for the immediate stop of the press plate adjusting movement emits.

Suitably, the synchronizing device further comprises guide rollers on that at a right angle to the gears are aligned and roll on flat tracks.

In a further embodiment, the invention teaches that the Press frame has pillars on the longitudinal sides arranged and screwed to the press table or welded, and that the machine-supported Cylinder / piston arrangements on the one hand to a pedestal and on the other hand connected to the associated press plate are. This version results in a special compact design of the multi-daylight press.

Fig. 1

die Seitenansicht einer Mehretagenpresse,

Fig. 2

eine Draufsicht auf die in Fig. 1 dargestellte Mehretagenpresse,

Fig. 3

in vergrößerter Darstellung den Ausschnitt Z aus Fig. 2,

Fig. 4

die Ansicht X aus Fig. 3.

In the following the invention will be explained with reference to a drawing showing only one embodiment. It show in a schematic representation

Fig. 1

the side view of a multi-daylight press,

Fig. 2

a top view of the shown in Fig. 1 multi-daylight press,

Fig. 3

in an enlarged view the detail Z of Fig. 2,

Fig. 4

the view X of FIG. 3.

The multi-chamber press shown in the figures is for Hot-pressing of plate-shaped workpieces made of wood or wood material with glued foils, veneer layers and the like. For the basic structure of Press include a press frame 1, one in the press frame 1 fixed press table 2, vertically movable Press plates 3, 3 ', 3 "below and above the press table 2, cylinder / piston assemblies 4, 4 'for the adjusting movement the press plates 3, 3 ', 3 "and mechanical Synchronization devices 5 for the vertical guidance of the movable Press plates 3, 3 ', 3 ". Above and below the fixed press table 2 is each a group several cylinder / piston assemblies 4 on the press frame. 1 machine-supported and connected to a press plate 3 ', 3 "connected.

Below the fixed press table 2 is a press plate assembly 6 of two movable, stacked Preßplatten 3, 3 'are provided, wherein the fixed press table 2 with the adjacent press plate 3 'a first compression chamber 7a limited and the two movable press plates 3, 3 ' form a second compression chamber 7b. The two press chambers 7a, 7b of the Preßplattenanordnung 6 are opened in alternation and closed. In particular, Fig. 1 takes one, in that the two press plates 3, 3 'of the press plate arrangement 6 by a group of several parallel cylinder / piston assemblies 4 'are interconnected and that the machine-fixed supported cylinder / piston assemblies. 4 on the press plate 3 'work, which is the fixed press table 2 is adjacent.

On the outside of both the uppermost pressing plate 3 '' as also the lowermost press plate 3 of the multi-chamber press arranged a mechanical synchronizing device 5, the during the pressing process, a parallel alignment of the movable Press plates 3, 3 ', 3 "to ensure the press table 2. Der constructive structure of the synchronization device 5 is made Fig. 2 clearly. The synchronization device 5 has gears 8 on, spaced from each other on the outside the movable press plate 3, 3 '' are mounted, by Shafts 9, 10 are rigidly coupled and mounted on vertical guide racks 11 unroll. The gears 8 are at the Corners of two parallel, on the outside of the movable Preßplatte 3, 3 "mounted pinion shafts 9 arranged. The pinion shafts 9 are via bevel gear 12th and a coupling shaft 10 connected together. The on the racks 11 rolling gears 8 lead the press plates in the longitudinal direction of the multi-chamber press and prevent Tilting movements of the press plate during the pressing process. For guidance in the transverse direction are guide rollers 13th provided at a right angle to the gears 8 are aligned and on level guideways 14, in the embodiment on side surfaces of the racks, unroll (Figures 2 and 3).

4 shows that the shaft bearings 15 of the synchronizing device 5 with a split plummer block housing 16a, 16b are formed. The lower housing half 16 a of Plummer block housing is attached to the press plate 3 or 3 ". The upper housing half 16b of the plummer block housing is vertically movable against a prestressed spring arrangement 17 supported on the lower housing half 16a. To the Upper housing half 16b is a switching device 18 consisting from a switch lug 19, a rocker arm 20 as well a switch 21 connected to a vertical movement the upper housing half 16b is a stop signal for the Immediate stop of the press plate actuating movement. The Switching device 18 prevents damage to the Synchronization device, when during the pressing process, z. B. came due to a in the compression chamber Foreign body, the movable press plate is tilted and the forces no longer from the synchronization device 5 can be compensated.

From Fig. 1 it is clear that the two press plates 3, 3 'provided below the press table 2 Preßplattenanordnung 6 only a single synchronization device. 5 is assigned, which faces away from the fixed press table 2 outer press plate 3 is connected. A single synchronizing device 5 is sufficient if the both compression chambers 3, 3 'of the Preßplattenanordnung 6 in Alternating cycle can be operated. Are the two moving Press plates 3, 3 'with the interposition of the pressed material braced against each other, so form these two press plates a functional unit whose horizontal orientation during Pressing operation by the lower-side synchronization device. 5 is controlled. Consequently, the between the fixed press table 2 and the adjacent press plate 3 'formed first compression chamber 7a properly opened and closed become. When the first pressing chamber 7a is closed forms with the press table 2 with the interposition of Pressed material clamped pressing plate 3 'with the press table. 2 a functional unit. Now, the outer press plate 3 opened and the pressing process under the action of the synchronization device 5 made in the second compression chamber 7b become. According to the invention, the synchronization device 5 used for the movement of the outer press plate 3 alone and for the movement of the two press plates 3, 3 'of the Preßplattenanordnung 6 in the package.

Within the scope of the invention, it is also above the fixed Press table 2 a press plate assembly 6 of two movable, linked by cylinder / piston arrangements Press plates and with a single synchronizing device. 5 to provide on the upper press plate. It is also possible below and / or above the fixed press table 2 Press plate assemblies 6 with more than two movable Provide press plates, wherein the movable press plates in the manner described in pairs by cylinder / piston assemblies 4 'are chained in pairs and only the outer press plate with a synchronization device 5 is equipped. It is essential that the delimited by the press plates of the press plate assembly 6 Press chambers are opened and closed in alternating cycles.

Always only one single compression chamber may be open, while all other Preßkammern the Preßplattenanordnung. 6 are closed.

It is understood that the press table 2 and the movable Pressing plates 3, 3 ', 3 "designed expediently heated are. Furthermore, in the press chambers 7a, 7b floor-forming Insoles (not shown), also heated and provided with conveyor belts, be provided.

Figs. 1 and 2 it extracts, that the press frame. 1 Standing columns 22 which, on the longitudinal sides of the press table 2 arranged and screwed or with this are welded. The machine-supported supported cylinder / piston assemblies 4 are on the one hand to a pedestal 22 and on the other hand to the associated press plate 3 ', 3 " connected. In this embodiment of the invention omitted lower and upper cross members, which the height would increase the multi-chamber press.

Claims (6)

1. A multiple chamber press, particularly for hot-pressing panel-shaped workpieces made from wood or derived timber products with an adhesive films, veneer strips and similar, with
   a pressframe,
   a bedplate permanently affixed to the pressframe,
   vertically movable press plates above and below the bedplate,
   cylinder/piston arrangements for the adjusting movement of the press plates and
   a mechanical synchronising device for the vertical guidance of the movable press plates,
   wherein one group of multiple cylinder/piston arrangements is permanently braced against the machine above the bedplate and a second group is similarly braced below the bedplate at the pressframe or the bedplate, and each is connected to a press plate,
   wherein a press plate assembly (6) including at least two press plates (3, 3') that are movably arranged one above the other is provided above and/or below the fixed bedplate, wherein the fixed bedplate (2) defines a first press chamber (7a) with the adjacent press plate (3'), the two movable press plates (3, 3') form a second press chamber (7b) and the press chambers (7a, 7b) of the press plate assembly (6) are opened and closed alternatingly,
   wherein the movable press plates (3, 3') of the press plate assembly (6) are attached to one another via a group including a plurality of cylinder/piston arrangements (4') connected in parallel,
   characterised in that
   the synchronising device (5) for vertical guidance of the press plate assembly (6) is only connected to the outer press plate (3) farthest from the fixed bedplate (2) and
   the synchronising device (5) has toothed wheels (8) that are supported at a distance from one another on the outer side of the outer press plate (3, 3'), are coupled rigidly via shafts (9, 10), and roll on vertical toothed guidance racks (11).
2. The multiple chamber press as cited in claim 1, characterised in that the toothed wheels (8) are supported at the ends of two parallel pinion shafts (9) that are supported on the outer side of the outer press plate (3, 3"), wherein the pinion shafts (9) are connected with one another via bevel gear assemblies (12) and a clutch shaft (10).
3. The multiple chamber press as cited in either of claims 1 or 2, characterised in that the synchronising device (5) is equipped with a journal bearing (15) with a split plummer block bearing housing (16a, 16b), wherein a lower housing half (16a) of the plummer block bearing housing is securely attached to the press plate (3, 3") and the upper housing half (16b) of the plummer block bearing housing is braced against the lower housing half (16a) by a pre-biased spring arrangement (17) so as to be vertically movable, and that a switching mechanism (18) is connected to the upper housing half (16b), and emits a stop signal for the immediate stop of the press plate positioning movement in the event of vertical movement.
4. The multiple chamber press as cited in any of claims 1 to 3, characterised in that the synchronising device (5) has guide rollers (13) that are aligned at a right angle to the toothed wheels (8) and roll on level guide tracks (14).
5. The multiple chamber press as cited in any of claims 1 to 4, characterised in that the press frame (1) has pedestal columns (22) that are arranged on the longitudinal sides of the bedplate (2) and are screwed or welded thereto, and that the cylinder/piston assemblies (4) that are permanently braced against the machine are connected both to a pedestal column (22) and to the assigned press plate (3, 3").
6. The multiple chamber press as cited in claim 5, characterised in that the cylinder/piston arrangements (4) that are permanently braced against the machine above and below the bedplate (2) each work towards the press plate (3, 3") that is adjacent the fixed bedplate (2).

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