DE202012011616U1 - Press for laminated beams - Google Patents

Abstract

Press for laminated beams, wherein glued wooden slats are pressed in an upright arranged press room with sectionally arranged punches and height-adjustable counter punch, characterized in that the counter punch (9) to adapt to an elevation (Ü) are individually adjustable in variable height positions.

Description

The invention relates to a press for laminated beams with the preamble features of claim 1.

In the production of laminated beams or glued laminated timber board lamellae are first glued, then stacked and pressed in suitable presses to form stable carriers, as z. B. in the DE 299 21 285 is described. From these laminates large components with complex constructions can be made, as the binders can be made in almost any length and shape. Of particular interest are so-called. Exposed laminated beams, which are preformed or bent with a large radius (of about 20 meters) against the subsequent load direction, so that they can accommodate correspondingly higher loads with the same material use or laminated beams with elevation at the same load require a smaller amount of wood.

Conventionally, such elevated glue beams are made of glulam, with mostly pre-sorted and removed from flaws wood slats are used. The individual lamellae are then glued and previously placed in a horizontal press, possibly with the help of a template and pressed. Due to the vertical arrangement of the adhesive joints, however, the losses of dropping glue or adhesive in the so-called "open" time are great, so that the cleaning effort on the press is considerable. In addition, the space requirement of such lying presses is enormous, the glue binder must remain in the curing time of several hours in the pressurized state in the press so that the splices meet the requirements of the strength. Thus, in a smaller hall often only the production of a single Leimbinders per day is possible. In addition, the availability of different templates is very costly.

To achieve the shortest possible cycle times, suggests, for example, the US 4,776,919 to use a stationary press, wherein the individual, glued lamellae are conveyed from the front side in the press room and the lamella stack is then pressurized with punches. This hydraulic cylinders are used, which press the lamella stack against upper pressure plates. The serving as a counter punch plates are arranged in sections and height adjustable by spindles. Here, a central drive shaft is provided, which drives all spindles as it were, so all printing plates are moved simultaneously by the same amount in the same height position.

The disadvantage here is also that the lamella stack to be pressed is formed only in the press. This means, on the one hand, that the press room must first be emptied completely before it can be started with a new loading of the press; on the other hand, the final alignment of the lamella stacks can also be done only in the press. In the production, it thus comes to an extension of the cycle times with long unproductive phases.

The object of the present invention is therefore to avoid the above disadvantages and to provide a press for laminated beams with which an elevation is simple and effective to produce.

This object is achieved by a press according to claim 1. Advantageous developments are the subject of the dependent claims.

In the press according to the invention. the counter punch to achieve a desired elevation individually set in different height positions, so that the desired radius (or mathematically more accurate: a polygon) is achieved as a counter-mold for pressing. The lamella stacks pressed to the raised laminated beam consist in particular of different lengths, u. U. keilverzinkten board blades, preferably made of quality pinnacles. In addition, fiber composite materials are also conceivable as intermediate layers. The press is preferably loaded with a feed device on one end face and unloaded on the end face facing away therefrom by an expander arranged there. The feeding device can also have a pushing element which pushes out the pressed laminated beam from the press room, while at the same time the wood stack to be subsequently pressed is conveyed into the press room. In the bottom region of the press room, a roller conveyor is preferably provided, the rollers are arranged between segments of the counter punch. The rollers are preferably driven to facilitate entry and exit into and out of the press room. The press is in this case constructed as a rectangular frame or in the manner of a portal, wherein the counter punches are preferably provided with associated single drive in the bottom area.

The setting of the counter punches (or their segments) preferably takes place simultaneously from a central control. When using a fully automatic production line, the corresponding previously stored production data can be used for setting the superelevation in order to ensure a smooth flow of the entire production process.

The raised glue beams may have spans of more than 20 meters, with the Elevation (measured in the middle) z. B. 40 mm. If z. B. nine counter punches (segments) are provided, the height position rises to the center of each 10 mm, then drop gradually from the highest position on the fifth counter punch again. In order to achieve an approximation to a circular arc, both the pressure shoes of the punches and the segments of the counter punches are mounted transversely to the longitudinal extent of the press room.

Further advantages, features and features of the invention will become apparent from the following description of a preferred embodiment with reference to the schematic drawings. Show it:

1 a side view of a press with representation of the elevation, and

2 a cross section showing a counter punch adjustment.

1 shows in side view a press 1 For the production of inflated linen binders made of board lamellae 2 , The press 1 has one of a rectangular portal frame 4 circumscribed press room 3 , As well as this upstream a feed device, not shown. In the ground area 3 ' are conveying elements, in particular rollers 5 for transporting glued wooden slats 2 intended. These bottom-side rollers 5 are preferably designed as a roller conveyor and cause the transfer of the board lamellae 2 from the upstream Beleimungsstation (not shown) as well as the transport of the compressed Leimbinders from the press room 3 out. The roles 5 can be arranged lowerable, so as to be relieved of the pressure load during the pressing process.

The in the press room 3 imported wooden lamella stacks 2 is here on the top side via hydraulic cylinders 8th as a stamp 7 pressurized (may also be arranged on the bottom side). The hydraulic cylinders 8th are preferably in the upper area of the portal frame 4 attached, so that their piston rods with high force to the wood lamella pile 2 can be pressed. How out 1 can be seen, points the press 1 here a total of four frame sections 6 on, leaving the portal frame 4 is modular extendable. Here are in each module 6 two hydraulic cylinders 8th intended. The piston rods of the hydraulic cylinders 8th indicate at their wooden lamellas 2 facing ends of pressure shoes 8a on, transverse to the longitudinal extent of the press 1 od on bolts. Like. Are hinged, so as to uniform pressurization of the wood lamella stack 2 to effect.

In 2 is a cross section through the press room 3 shown, in this only a few board slats 2 under the pressure shoe 8a of the upper stamp 7 are shown. In general, the raised glue beam is formed from several dozens of the stacked and glued wooden or board lamellae. Above the pressure shoe 8a is also the articulated bearing with a pivot pin visible (here indicated only by a dashed line.) Below the workpiece (slats 2 ) is one of the segment plates 9 shown in the ground area 3 ' in lateral slots 3a is guided. This serves to prevent rotation of the counter punch 9 if the segment plate 9 ' through the adjustment drive 10 be adjusted in height, with a rotating spindle 10 ' is provided. This is powered by a geared motor 11 driven and in a trapezoidal thread nut 11 ' guided. The adjustment range of the spindle 10 ' corresponds to the maximum cant Ü of z. B. 80 mm.

Instead of the rotating spindle 10 ' can also be provided a stationary spindle with a screw jack or even wedges, in the lateral direction below the segment plates 9 be retracted. Since the Verstellhub is relatively low, other, familiar to the expert gear as adjustment 10 be used, such. B. eccentric or toggle. Common here is the preferably self-locking design of the adjusting elements, so that the adjusting motor itself no pressing forces of the punch 8th act during compression. At the top of the spindle 10 ' here is a shim 12 provided at the the segment plate 9 is mounted pivotable about a few degrees to so, similar to the pressure shoe 8a , transverse to the longitudinal extent of the press room 3 to adapt as well as possible to the radius of the elevation Ü (cf. 1 ).

The gearmotors 11 for every countermark 9 are with a central control 13 (Only indicated schematically here), so that depending on the required elevation Ü in adaptation to the respective length of Leimbinders the individual counter punches 9 be moved to the appropriate height position, as in 1 is shown. It should be noted that the in 1 left stamp 8th is not pressed and therefore not the corresponding counter punch 9 , because here the glue binder or wooden lamella pile 2 a shorter length than the press room 3 having. So here are only seven of the eight stamps 8th in use. Right next to the middle segment plate 9 ' (with the largest elevation Ü) are two segment plates 9 ' also shown in the lowered starting position. It can be seen that the segment plates 9 ' in this starting position (lowered spindle 10 ' ) between the roles 5 of the roller table, so that the entry or exit is not hindered.

LIST OF REFERENCE NUMBERS

1

Press

2

Wooden / laminations

3

Press room

3 '

floor area

3a

slots

4

portal frame

5

roll

6

frame sections

7

stamp

8th

hydraulic cylinders

8a

pressure shoes

9

counterpunch

9 '

segment plates

10

Adjusting drive / transmission

10 '

spindle

11

gearmotor

11 '

Trapezoidal threaded nut

12

shim

13

Central control

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 29921285 [0002]
• US 4776919 [0004]

Claims (11)

Press for laminated beams, wherein glued wooden slats are pressed in a standing arranged press room with sectionally arranged punches and height-adjustable counter punch, characterized in that the counter punches ( 9 ) are adjustable individually in variable height positions for adaptation to an elevation (Ü). Press according to claim 1, characterized in that the counter punches ( 9 ) in the ground area ( 3 ' ) of the press room ( 3 ) is arranged. Press according to claim 1 or 2, characterized in that the counter punches ( 9 ) are adjustable simultaneously or in succession. Press according to one of claims 1 to 3, characterized in that the counter punches ( 9 ) from a central control ( 13 ) are controllable. Press according to one of claims 1 to 4, characterized in that the counter punches ( 9 ) a spindle gear ( 10 ' ) exhibit. Press according to one of claims 1 to 4, characterized in that the counter punches ( 9 ) each have a wedge adjustment Press according to one of the preceding claims, characterized in that the punches ( 7 ) as a hydraulic cylinder ( 8th ) is formed, which are arranged hanging. Press according to claim 7, characterized in that the punches ( 7 ) on the wooden slats ( 2 ) attachable pressure shoes ( 8a ) transversely to the extension of the press room ( 3 ) are hinged. Press according to one of the preceding claims, characterized in that the counter punches ( 9 ) Segment plates ( 9 ' ) transversely to the extension of the press room ( 3 ) are hinged. Press according to claim 9, characterized in that the segment plates ( 9 ' ) on the side of the press room ( 3 ) in slots ( 3a ) are guided. Press according to one of the preceding claims, characterized in that a plurality of pressing spaces ( 3 ) are arranged to rotate.

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