DE1145980B - Device for cutting a wood wool-binding agent strand continuously moving on mold plates into sections of equal length - Google Patents

Description

Device for cutting up a continuously moving on mold plates Wood wool binding agent strand in sections of equal length When making Lightweight panels are mixed with a binding agent such as cement or magnesite Wood wool ropes placed in shaped plates, which are continuously moved. These mold plates are mostly made of plywood and have their ends against each other. the to be produced building boards get their lateral delimitation by fixed, with the Form plates connected or by subsequently inserted edge strips. The one on the Mold plates continuously moved wood wool binding agent strand is by means of a Cut-off saw cut into individual sections of the same length. The following must be used Requirements are met: 1. The mold plates may be used during the cutting process not be pulled apart so that the strand is the same at the point of separation Maintains strength.

2. The separating cut must be made exactly in the joint of the mold plates because otherwise the building boards will be of unequal length and the wood wool fibers will be subsequent pressing process protrude from the mold plates.

3. The mold plate must not be damaged by the cut-off saw.

4. The cut-off saw is intended for continuous production of the building panels be suitable to enable a large production output.

5. The cut-off saw should work automatically and be completely secured so that no incorrect cuts occur through the mold plates.

6. If the mold plates are not exactly on top of each other at the joint, the cut-off saw must not function and the feed of the mold plates must turned off. It must be avoided that the severing cut begins, if the mold plates are pushed together at the joint or a distance here have from each other.

7. There should be building boards of any length, possibly from each other alternating different lengths without changing the feed of the mold plates or Change of the machine.

So far, these requirements have not been met or only partially met will.

In a known device, the advance is during the cutting process the mold plates turned off and the last mold plate moved a little forward, whereby a gap is created in which the fiber strand is cut through with the cut-off saw will. However, this reduces the strength of the strand at the point of separation, and no great performance can be achieved if every time the separation process is carried out the feed is stopped. In another device, the mold plates lie on chains that have a stop at each end of the mold plates against which the Cutting saw is centered. The cut-off saw is movable with the mold plates and enables high performance though. Here is a precise insertion of the mold plates between the stops of the chain required, which means that the lengths of the mold plates are always constant presupposes. If a mold plate is a little too far forward or back against the stop rests, a strip is cut from the mold plate during the separation process. When the chain is stretched or its pivot points wear out, the changes Length of the section severed from the strand, and the mold plates are through Cut off a strip gradually shorter and shorter at the joint.

You have already taken the cut-off saw through the end of the mold plate, wherein the strand is severed back along a length of the plate. Here is none Guaranteed that the joint of the mold plates is in order. The mold plates can be pushed one on top of the other here or be at a distance from one another. Even If the cut-off saw is not firmly coupled to the mold plates, which is particularly important with sudden shutdown of the machine during the cutting process has an unfavorable effect, because the saw is not stopped immediately and the mold plates from behind cuts. With the same spacing of the Chain stops can only a certain length of the mold plates can be used.

In another device, the mold plates are made of steel and carry a welded-on driver cam on the front end, on which the cut-off saw that the mold plates backwards against the driver during the cutting process pushes onto the conveyor chain. Safe work is also not guaranteed here, because the mold plates slide over one another every now and then and are then of the cut-off saw is damaged.

It is also known, the cutting saw driven by an electric motor to couple with the wood wool binding agent strand during the cutting process, the slides on a stationary sieve plate through which compressed air flows. The drive motor the cut-off saw is controlled by a rotatable contact disc, which is in front of the separation point rests on the surface of the strand and is rotated by it. The contact disc rotates because of the uneven surface of the strand with a slip that does not allow precise control of the cut-off saw.

In a device for producing ceiling or wall stones from Reinforced concrete, the underside of which is guided by construction panels placed on a conveyor belt adjustable ribs have been attached to the conveyor belt, which act as carriers serve for the building panels. The concrete applied to the building panels is through a saw that is moved forward by the ribs of the conveyor belt and makes a severing cut in the transverse direction. After finishing the cutting process the saw is disengaged from the ribs and automatically returns to theirs Starting position back. The length of the individual sections depends on the distance of the ribs, all of which must be adjusted when the length of the sections should be changed, which is associated with a great deal of work and time.

The invention is to provide a device that all meets the above-mentioned requirements and the disadvantages of the known devices avoids. For this purpose, the invention gives the teaching, the means for coupling the cut-off saw with the continuously moving mold plates symmetrically on their two longitudinal edges to provide for their joint and to center the cut-off saw against the joint. Through this is carried along by the continuously moving mold plates during the cutting process Cut-off saw guided so that the cut exactly between the joint of the mold plates got. The feed of the mold plates need not be interrupted during the cutting process and there can be no miscuts damaging the mold plates.

According to a preferred feature of the invention, the edge strips are Form plates arranged symmetrically to their joint recesses into which the cut-off saw Engage the coupled guide elements.

The wood wool strand is placed on the one provided with the edge strips Mold plates guide well, and its long edges are also straightened without that this requires special longitudinal cuts. The cut-off saw gets through their guide elements engaging in the recesses of the edge strips a safe Leadership, and there is always an exactly right-angled severing cut, with none Incorrect cuts can occur because the cut-off saw only makes its cut when by engaging their guide elements exactly in front of the joint of the form = plates lies.

According to a further feature of the invention are at the separation point Fixed, horizontal longitudinal rails arranged on which a frame is movable is stored, are attached to the cross rails, the transverse to the feed of the Carrying mold plates movable cut-off saw.

It is useful to have an electrical frame on which the cut-off saw is carried Switching device angeörd net, the one in a known manner the transverse movement the cut-off saw turning on the electric motor after all guide elements are locked in the recesses of the mold plates. With such a control the cut-off saw automatically and precisely cuts off the individual panel sections achieved without interrupting the advance of the mold plates during the cutting process needs to become.

Further details and features of the invention emerge from the Drawing in the various embodiments in a simplified representation are illustrated. In the drawing, Fig. 1 shows the top view of two mold plates, Fig. 2 is the front view of a cut-off saw be a section in the plane A-A of Fig. 3, FIG. 3 the side view of the cut-off saw, FIG. 4 the side view of another Embodiment of the cut-off saw, Fig. 5 details of this cut-off saw. . On a Runway 1 are z. B. made of plywood or boards existing rectangular shaped plates 2 lined up, the feed by a drive device, not shown obtained in the direction of the arrows in FIG. The ends of the individual mold plates' 2 lie against each other at joint 3.

The mold plates 2 are provided on their longitudinal edges with edge strips 4, which are slightly shorter than the shape: plates 2 and on the joint 3 of the mold there is one. form. In the edge strips 4 of its columns are close to # 5 semicircular recesses 6c, 6 b, 6 c, 6 d attached, form the four lying symmetrically to the mold joint 3 centering points.

The mold plates 2 are in a known manner with the with a binder, for. B. cement, mixed wood wool is charged, which is evenly distributed over the entire surface of the mold plates 2 "At the point where the fibrous, in see together" fleece is severed over the length of the mold plates 2, there are two stationary above the mold plates parallel, horizontal longitudinal rails 7 and below these two parallel, horizontal transverse lines 8 are arranged. The latter protrude on both sides beyond the mold plates 2 and are supported by a frame 9, which is movably mounted on the longitudinal rails 7 by means of rollers 10 A slide 29 is movably mounted on the cross rails 8 by means of rollers 27, on the underside of which an electric motor 11 and a circular saw 12 coupled to it, for example via a belt drive, are attached a is arranged. By switching the motor 25 on and off, the carriage 29 with the hängep on it; the circular saw 12 moved back and forth transversely to the advance of the Fnplatten 2, two vertical sensor arms 13 a, 13 b and 13 c, 13 d are also hinged to the frame 9 as shown in FIG a roller 14a, 14b or 14c, 14d is mounted at the lower end. These rollers scan the outer edge of the edge strips 4 and can snap into their recesses 6a to 6d , which have the sensor arms 13 a, 13 b and 13 c, 13 d at the same distance from one another as the corresponding recesses 6 a, 6 b and 6 c, 6 d of the marginal ridges 4.

The feeler arms 13 a to 13 d are each attached to a horizontal shaft 15a, 15b, which are rotatably mounted in the frame. 9 A horizontal lever 16 a is attached to the shaft 15 a and a horizontal lever 16 b is attached to the shaft 15 b. The two levers 16 a, 16 b lie against one another in the vertical plane laid through the longitudinal center of the mold plates 2 and are here articulated to one another by a coupling 17 on which a strong tension spring 18 anchored in the frame 9 engages. The tensile force of the spring 18 is transmitted via the levers 16 a, 16 b to the sensor arms 13 a, 13 b and 13 c, 13 d, so that their rollers 14 a, 14 b and 14 c, 14 d with tension the edge strips 4 rest. As soon as the mold plates 2 moved on the roller conveyor 1 reach the separation point, the rollers 14a to 14d snap into the corresponding recesses 6a to 6d of the edge strips 4. But since all rollers 14 a to 14 d are coupled to one another, the frame 9 on the longitudinal rails 7 can only be taken along by the moving mold plates 2 when all four rollers 14 a to 14 d are in the corresponding recesses 6 a to 6 d of the edge strips 4 are engaged.

The locking of all rollers 14 a to 14 d is monitored by an adjustable limit switch 19 which is attached to the frame 9 and is located in the circuit of the drive motor 25 for the transverse transport of the carriage 29 carrying the circular saw 12. The switch 19 can only close its contacts and turn on the motor 25 when the levers 16 a and 16 b after the rollers 14 a to 14 d have engaged in the recesses 6 a to 6 d of the edge strips 4 around their shafts 15 a, 15 b have been pivoted completely upwards.

If all the rollers 14 a to 14 d are properly engaged in the recesses 6 b to 6 d of the edge strips 4, the drive motor 25 causing the transverse transport of the circular saw 12 is switched on, and the circular saw 12 driven by the motor 11 makes a severing cut exactly in that Form panel joint 3 through, whereby the individual building panels are separated. If not all four rollers 14 a to 14 d are engaged in the corresponding recesses 6 a to 6 d of the edge strips 4, the limit switch 19 does not switch on the motor 25 for the transverse transport and does not switch the feed of the mold plates 2 off. The fault that has occurred can then be rectified. By means of the engaged rollers 14 a to 14 d, the frame 9 is coupled to the mold plates 2 and moves with them in the longitudinal direction during the separation process, so that the feed of the mold plates does not need to be interrupted. The separating cut is always carried out exactly on the mold joint 3, and damage to the mold plates 2 is prevented with certainty, since the circular saw 12 can only work if the mold plates 2 are properly adjacent to one another at their joint. Once the severing cut has been made, the motor 25 is switched over and brings the carriage 29 carrying the circular saw 12 back into its starting position. Here, the spring 18 relaxes, the arms 13 a, 13 b open and release the mold plates 2 again. The frame 9 can, for. B. be moved back to its original position by a tension spring, not shown.

The saw blade of the circular saw 12 is set so deep that it is in the mold joint 3 only reaches the surface of the mold plates 2 and the mold plates cannot be damaged here. Otherwise, a slight incision would be made here do not interfere with the mold plates. Since the edge strips 4 are slightly shorter than the mold plates 2, the saw blade can easily be moved through the gap 5.

In order to achieve a clean separation cut, it is recommended that the Fiber material in the vicinity of the mold joint 3 through horizontal ones attached here To press rods 20, as can be seen from FIG. These rods 20 are, for. B. coupled with a lifting magnet 26, which is switched on during the separation process and it presses against the fiber material located in the mold plates 2.

The precise centering of the cut-off saw achieved by the invention enables a double cut to be made on the joint, as shown in FIG can be seen. The circular saw here receives two saw blades 21, between which several rods 20 are arranged for pressing the strand. The one between the two Saw blades 21 cut-out strips 22 are always located on the same Place and is removed after separation to be returned to the distributor to be where it is mixed with the remaining raw material and back on the mold plates is given. Instead of the cut-out strip 22 are in the mold plates two head strips inserted, which at a width of the strip 22 of z. B. 16 cm each have a width of 10 cm, so that the plates are pressed in by 2 cm on each face when they are fed into a four-side press after the cutting process. This gives the building boards good nailability on the front sides.

From Fig. 5 it can be seen that in the transverse direction in front of the two saw blades 21 on the carriage 29, one or two scrapers 23 are arranged, which around a horizontal axis 24 are pivotable and when the saw 21 returns, the cut out Take the strip 22 with you and strip it off the mold plate.

The separating device designed according to the teaching of the invention has has proven itself excellently in practice and fully meets all requirements. It is of particular advantage here that one for the transport of the mold plates a simple runway is sufficient. Chains with drivers and stops are not included here required, so that the device has a simple and reliable design receives. After millions of separations, the mold plates are still undamaged, and the device works perfectly. The occurrence of miscuts will be prevented with certainty.

Claims (10)

PATENT CLAIMS: 1. Device for cutting one on mold plates continuously moving wood wool binding agent strand in individual sections of the same Length by means of an electric motor driven Cut-off saw that during the cutting process with those lined up next to one another and receiving the strand Form plates is coupled, characterized in that the means (6 a to 6 d) for coupling the cut-off saw (12, 21) to the shaped plates (2) on their two longitudinal edges are provided symmetrically to their joint (3) and the cut-off saw (12, 21) against the Center the joint (3). 2. Apparatus according to claim 1, characterized in that on the edge strips (4) of the mold plates (2) symmetrically to their joint (3) recesses (6a to 6d) are arranged, into which with the cut-off saw (12, 21) coupled guide elements ( 14 a to 14d). 3. Device according to claims 1 and 2, characterized characterized in that stationary horizontal longitudinal rails (7) are arranged at the separation point are, on which a frame (9) is movably mounted, attached to the cross rails (8) are that the cutting saw (12, 21), which is movable transversely to the feed of the mold plates (2) wear. 4. Apparatus according to claim 3, characterized in that on the frame (9) carrying the cut-off saw (12, 21) sensors (13 a to 13 d) are mounted, which are under tension of a spring (18) on the two longitudinal edges of the mold plates (2) are present. 5. Apparatus according to claim 4, characterized in that the sensors (13 a to 13 d) are arranged vertically and rigidly connected to horizontal levers (16u, 16b) which are under the action of the tension spring (18). 6. Apparatus according to claim 3, characterized in that on which the cut-off saw (12, 21) supporting frame (9) an electrical switching device (19) is arranged is, the one in a known manner, the transverse transport of the jigsaw (12, 21) causing electric motor (25) only switches on when all sensors (13 a to 13 c @ are engaged in the recesses (16a to 16d) of the front plates (2). 7. Apparatus according to claim 1, characterized in that in the vicinity of the shock (3) the mold plates (2) means (20) for pressing down the in the mold plates (2) located fiber material are arranged. B. Device according to claim 7, characterized g indicates that the fiber material in the mold plates (2) holding down rods (20) are coupled to a lifting magnet (26). 9. Apparatus according to claim 1 with a double cutting saw, characterized in that the two saw blades (21) carrying carriage (29) a scraper (23) is pivotably mounted, which the severed strip (22) when the double cut-off saw (21) declines in the transverse direction strips off. 10. The device according to claim 1, characterized in that the mold plates (2) are movably mounted on each roller conveyor (1). Considered publications: German Patent No. 971650; British Patent No. 723,009; U.S. Patent No. 2,538,972.