FI69267B - APPARATUS FOER FRAMSTAELLNING AV EN- ELLER FLERSKIKTIGA SPAONPLATTOR FIBERPLATTOR ELLER DYLIKT - Google Patents

Description

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Patent application 10 01 1986 (51) Kv.lk.7int.CI.4 B 27 N 3/16 FINLAND— FI N LA ND (21) Patent application— Patentansökning 773668 (22) Application date - Ansökningsdag 02.12.77 (EN ) (23) Starting date - Giltighetsdag θ8.05.69 (41) Made public - Blivit offentlig 02.12.77

National Board of Patents and Registration Date of publication and publication publication—

Patent- och registerstyrelsen '' Ansökan utlagd och utl.skriften pubiicerad 3O.O3.85 (32) (33) (31) Requested privilege - Begärd priority 22.11.68

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) P 1810240.4 (71) G. Siempelkamp S Co., Seimpelkampstrasse 75, 4150 Krefeld, Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (72) Gerhard HCitz, Siichteln, Federal Republic of Germany Förbundsrepubl iken Tyskland (DE) (74) Oy Kolster Ab (54) Equipment for the production of single or multi-layer particle board, fibreboard, etc. - Apparat för framställning av en- eller flerskiktiga spänplattor, fiberplattor eller dylikt (62) patent 54250) -Avdelad fran ansökan 1361/69 (patent 54250)

Equipment of various constructions for the production of chipboards, fibreboards and the like is now known, in particular equipment consisting mainly of a sprinkler station, a filling rack, a multilayer press, a discharge rack and a conveying device connecting a sprinkler station and a filling rack. The goods are made single or multi-layered by using several overlapping spreading machines in the spreading station. Such equipment usually still requires auxiliary equipment for handling the goods between the spraying station and the multilayer press. In one known apparatus, feed plates are used, on which the goods to be pressed are sprinkled in a sprinkling station and with which the goods obtained as sprinkling in the sprinkling are fed to a multilayer press. The pre-compressed goods are removed from the 69267 feed plates only after pressing, either in the emptying rack or when the goods come out of the emptying rack, and the feed plates are returned to the spreading station. This recycling of feed plates is very costly and reduces the overall female power of the equipment. In addition, it should be noted that the feed plates consisting of relatively thick aluminum plates or the like must first be heated in a press and then cooled in a sprinkling station, which consumes energy. In another known apparatus, the feed plates have been replaced by so-called with band-tablets (see DE patent publication 1 201 983). Belt tablets then denote casting frames, the bottom of which is made as a conveyor belt. The goods to be compressed are sprinkled matless on the belt tablets in the sprinkler station and transported to the press. Here, the article to be compressed is placed on the press plates of the separate layers of the press by means of belt tablets, after which the belt tablets are pulled out and the compression takes place without belt tablets or other substrates. The pre-compressed article is pushed out of the belt tablets at the next filling of the press. Here, too, it is necessary to move the belt tablets back and forth between the press and the sprinkler station, which incurs costs and adversely affects work rhythm and performance.

The object of the invention is to provide an apparatus for producing single or multilayer chipboards, fibreboards and the like, in which it is no longer necessary to return the feed plates or belt tablets from the multilayer press to the spreading station. In this case, it is necessary to work with a continuously spreading machine or machines, which is necessary for technological reasons due to the high quality of chipboards or the like.

The invention takes advantage of the fact that in the modern production of particle board, fibreboard, etc. binders are used which, after spreading the goods on a flat surface, provide a mat from which cut parts can already be treated, so that feed plates or casting frames can be dispensed with. sufficiently carefully into parts or blocks and handled block by block carefully. The invention therefore relates to a device for producing chipboards, fibreboards, etc. from single or multilayer layers, which device consists of

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3 6 Q2 6 7 a spreading station, a filling rack, a multilayer press, a discharge rack and a conveying means connecting the sprinkling station and the filling rack, the conveying means consisting of a sprinkling belt with a reciprocating transfer cam and a rear-moving two-speed accelerator a dispensing spout, wherein a continuous separating device for dividing the pre-press and the goods path into cargo blocks is arranged in connection with the spreading belt between the spreading station and the transfer cam, and the filling rack has belts arranged for the individual layers of the multilayer press and inserted into and removed from the press layers. The apparatus is mainly characterized in that the belt bases of the belt tablets are likewise guided in the region of the dispensing cam (forming part of the belt tablet) over the receiving table and in that the dispensing cam is guided steplessly very close to the receiving table. To transfer the blocks of split goods on the spreading belt from this spreading belt to the accelerator belt, the transfer belt of the spreading belt passes over the accelerating belt and then returns. in step with the movement shown, and wherein all the belt tablets of the filling rack can be driven into the press simultaneously and emptied by retracting the belt tablet racks with the conveyor belt bases retained when lowering the goods blocks onto the press plates of the private layers of the press.

If worked as described, the mats, as they come from the sprinkler station, can be divided into blocks and these blocks can be transferred from the sprinkler belt to the accelerator belt. The transfer cam, taking into account the speed of the accelerating belt and the speed of the spreading belt, must move in such a way that no congestion or elongation occurs in the goods when moving the goods blocks from the spreading belt to the accelerating belt. The movements must be arranged to suit, which is explained in more detail below. During the transfer of the cargo block, the acceleration belt moves at the speed of the spreading belt to deliver the cargo block to the belt tablet and the filler rack at a higher speed immediately upon receipt, for which the conveyor belt base of the respective belt tablet is available at the corresponding speed. Thus, in the short time available between two consecutive goods blocks on the scattering belt, the goods block on the accelerator belt can be transferred to an in-situ belt tablet, after which the acceleration belt is ready to receive the next goods block from the scattering belt. The accelerator belt is thus necessary in order to be able to fill the private layers of the filling stand in a short time during the reciprocating movement of the accelerator belt delivery cam. It goes without saying that the blocks of goods must also be lowered onto the belt tablets of the filling rack in such a way that the goods do not become dull or stretched. Here again, the movements must be arranged to correspond to each other, which is explained below. As a result, the sprinkler station can operate continuously, even when the product blocks are transferred to the belt tablets. When all the belt tablets are fed simultaneously and at the speed of the acceleration belt to the multilayer press for counting the goods blocks here, the sprinkling station can also operate during the filling and pressing of the press, in which case the number of press layers and the pressing time must be matched. Manufactured particle board, fibreboard jras. are single- or multi-layer plates, depending on whether the spreading is carried out by one or more spreading machines or whether several mats are passed together during the spreading. The pre-compressed sheets are pushed out of the belt tablets into the multilayer press or removed with special aids. The drain rack placed after the press operates normally. If the goods to be pressed are handled according to the latest guidelines of technology, then it is possible to act as described and, in most cases, to refrain from special pre-pressing of the goods. But in the case of very delicate goods, then, in addition to the measures described, a preferred embodiment of the invention is used, characterized in that a continuous pre-press is placed between the spreading station and the transfer nozzle of the spreading belt to make the goods in sufficiently long blocks. pre-compression for easier handling. According to a preferred embodiment of the invention, the continuous pre-press consists of a large-diameter press cylinder. In this case, it is recommended that a pressure vessel be placed under the compression cylinder, the cover of which has nozzle holes, over which the spreading belt is guided, possibly by inserting a special compression belt. A pneumatic or hydraulic pressure medium coming out of the nozzle holes reduces the friction between the spreading belt and the compression belt and forms, as it were, a compliant counter-support for the pre-compression pressure. The hydraulic or pneumatic pressure medium presses the spreading belt and possibly the compression belt against the compression cylinder blades, which in turn can be arranged to rise and fall on its axis. In this case, it may be a question of a power-driven compression cylinder or also one which only rotates with it. In any case, the compression-cylinder design makes it possible to pre-compress goods manufactured according to modern technology with pre-compression pressures of 2-3 kg / cm, so that the treatment required in the apparatus according to the invention damage the stuff. These multiple transfers do not adversely affect the structure and strength of the manufactured particle board, fibreboard, etc., even for delicate goods, when handled as carefully described.

The advantages achieved by the invention are, above all, that in the apparatus according to the invention it is no longer necessary to move the feed plates, belt tablets, etc. back and forth between the sprinkler station and the multilayer press. The sprinkler station can operate continuously; in the apparatus according to the invention, the speed of movement of the moving elements can be easily matched and synchronized so that the apparatus as a whole can produce single- or multilayer chipboards, fibreboards, etc. with high power. The control measures required for this are simple, now well-known limit switch control technology and the like. and are therefore not described in more detail.

The described and other features of the invention will now be described in more detail with reference to the drawings showing only one structural example, in which Fig. 1 schematically shows an apparatus according to the invention for producing single or multilayer particle boards, Fig. 2 shows a partial embodiment of Fig. 1, Fig. 3 shows an enlarged part. 2 items.

The apparatus shown in Fig. 1 is used for the production of single- or multilayer chipboards, fibreboards and the like. It consists mainly of a spreading station 1, a filling rack 2, a multi-layer press 3 and an emptying rack 4, whereby a connecting conveying device 5, 6 is placed between the sprinkling station 1 and the filling rack 2. The conveying device 5, 6 consists first of a spreading belt 5 with reciprocating transfer nozzles from the accelerator belt 6 with its reciprocating delivery cam 8. A separating device 9 is arranged between the sprinkling station 1 and the transfer cam 7. In connection with the sprinkler belt 5 there is a suction gap 11 covered by the flap 10 and the filling rack for defective goods or blocks 14 to be removed. From here, the goods are led back to the sprinklers. The filling rack 2 has belt tablets 12 with conveyor bases 13 arranged for the individual layers of the multilayer press 3 and fed to and removed from these layers. back to the position shown. When lowering the cargo blocks 14 from the accelerator belt 6 to the belt tabs 12, the delivery cam 8 of the accelerator belt 6 extends over the leading edge of the respective belt tablet 12. The conveyor belt base 13 of said belt tablet 12 is then operated at the speed of the accelerating belt 6 and receives the article 14 from the accelerating belt 6. The kinematics of transfer and delivery are described in detail below. The filling rack 2 is raised in layers in step with the movement described above. All the belt tablets 12 of the filling rack 2 can be fed simultaneously to the private layers of the opened multilayer press 3. The lowering of the cargo blocks 14 onto the press plates 16 of the private layers of the press 3 takes place by pulling back the belt tablet racks 15 while holding the belt bases 13. When driving the belt tablets 12 into the layers of the multilayer press 3, the pre-compressed article 17 in the press is pushed out at the same time, whereupon it goes into the discharge rack 4. The discharge rack 4 can lower in layers, whereby the belt conveyor 18 receives the pre-compressed goods.

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69267 7 plates 17 from the emptying rack 4 and take them for further processing. A structural example describes a preferred embodiment of the invention, in another combination of which a spreading station 1 and a continuous pre-press 19 placed in front of the separating device 9 between the transfer cam 7 of the spreading belt 5.

The spreading belt 5 can have a wide variety of structures. The preferred embodiment of the invention, which is characterized by reliability and durability, is characterized in that the spreading belt 5 consists of a support belt 20 and a transfer belt 21, the support belt 20 and the transfer belt 21 being adapted to pass twice under the screening station 1 and possibly the pre-press 19. the belt 21 being guided around a reciprocating transfer cam 7. In this construction example, a compression belt 22 is located in the region of the pre-press 19 and the separating device 9. The spreading belt and the compression belt then together form a counter-support for the pre-compression pressure, which can be received in different ways, the preferred embodiment being explained in more detail below.

The shape of the separating device 9 is in principle arbitrary within the scope of the invention. In the preferred embodiment, the separating device 9 travels a predetermined distance with the goods to be cut into blocks 14, whereby suction devices 23 are arranged in connection with the separating device 9. An intermediate space 14a is formed between private successive goods blocks explained below.

The private belt tablets 12 in the filling holder have power-driven belt bases 13 mounted on a belt holder not shown in more detail in the drawings. Side walls such as a casting frame, which could prevent the receipt of cargo blocks, are not required. The drive mechanism of the belt tablets is located at the height at which the private belt tablets 12 must be when they receive goods from the accelerator belt. This can be, for example, a drive motor 24 with toothed clutches 25, whereby the drive shafts 26 of the belt bases 13 of the belt tablets 12 have corresponding coupling elements 27 and these coupling parts 25, 27 are connected during layered lifting so that the belt tablet 12 under the cam 8 is driven continuously. The speed of 69267 should obviously correspond to the speed of the accelerator belt 6. The accelerating belt 6 comprises a reciprocating delivery cam 8, with which the cargo blocks can be fed in the filling rack to the belt tablets 12 raised in layers. In addition, gears 28 are mounted on the drive shafts 26 of the belt bases 13 via free couplings. For the gears 28, racks 29 or chains are arranged in the filling bracket 12 or the multilayer press 3 so that due to the freewheel switches the belt bases 13 remain stationary when driving the belt tablets 12 to the layers of the press 3, but they return due to the freewheeling of the clutches. so that the compressible article blocks 14 resting on the belt tablets can be lowered onto the press plates 16 of the private layers of the press.

As already mentioned, the structural example of the apparatus according to the invention shows a continuous pre-press 19. According to a preferred embodiment of the invention, this pre-press consists of a large-diameter press cylinder 30. Below the press-cylinder 30 there is a pressure tank 31 fed with a hydraulic or pneumatic nozzle i.e., the largest perforated cover) covered by the support belt 20 and / or the transfer belt 21 and / or the special compression belt 22. The hydraulic or pneumatic pressure medium presses the closure of the pressure vessel 31 thus formed as a compliant counter-support against the compression drum 30, which is preferably moved up and down, while the friction is reduced. Thus, a pre-compression pressure of 2-3 kg / cm can be generated without difficulty, which is generally sufficient to pre-compress sensitive but also manufactured according to modern technological guidelines to three times the transfer, first from the transfer cam 7 to the accelerator belt 6, then from the acceleration belt 6 to the belt tablets. 12 and then from the belt tablets 12 to the multilayer press 3, without damage. Thus, it is possible to produce single- or multilayer chipboards, fibreboards, etc. by omitting feed plates or casting frames moving back and forth between the press 3 and the spreading station 1. In the plant according to this structural example, there are several spreading machines a, b, c in the spreading station, so that multilayer chipboards and / or fibreboards can of course be produced. The term sprinkler boiler 69267 also guarantees the so-called an assembly machine (Felter) of a kind used in the manufacture of fibreboards.

In the spreading station, the mat continuously produced for the continuously moving spreading belt 5 has to be divided into separate parts, i.e. blocks 14, because functional gaps must be provided during which the belt tablets 12 in the filling rack 2 can be lifted in layers and placed on the goods blocks 14 and long enough to fill the multilayer press 3. To this end, special kinematic relationships must be established, since at the same time, at the private transfer points, the material of the goods blocks 14 must be avoided. The kinematics required for this are first explained by a simple example.

The spreading belt 5 should move at the speed allowed by the spreading machines a, b, c of the spreading station 1. The front end of the transfer cam 7 should be located above the center of the accelerator belt 6. At this very moment, the transfer of the goods block 14 begins, whereby the transfer cam 7 moves backwards. If the accelerating belt 6 moves at a speed which is half the speed of the spreading belt 5, then in order to achieve a non-stretchable and non-stretching movement of the goods, the transfer cam 7 must move backwards at a speed of the spreading belt 5. When it reaches the end point of its backward movement, the displaced cargo block 14 rests completely on the acceleration belt 6. This situation is shown in the drawings. The next block of goods comes after the spreading belt 5 due to the distance provided by the separating device 9 only after some time. This time is available for lowering the goods block 14 by means of the accelerating belt 6 on the belt tablet 12 in place. The accelerator belt is used immediately after receiving the goods block 14 at high speed and the delivery tongue 8 moves over the front edge of the belt group 12. which is operated at the same speed so as to receive the goods block 14 without bulging or stretching the goods. When the article block is on the belt tablet 12, the delivery cam moves back and the filling rack can be raised by one layer. In the meantime, the transfer cam 7 of the spreading belt 5 has again advanced to the center of the acceleration belt 6. The work cycle starts again.

Once all the belt tablets 12 of the filling rack have received their own cargo block 14, the multilayer press is filled at the same rate, possibly for which one cargo block 14 is returned to the suction shaft 11. Of course the transfer cam 7 of the spreading belt 5 does not have to move to the center of the acceleration belt 14 the transfer begins. In general, according to the idea of the invention, the transfer of the article block from the scattering belt 5 to the accelerator belt 6 can be started at the moment the accelerator belt 6 is released, i.e. when the respective belt tablet 12 has received the previous article block 14. The open multilayer press 3 is filled during the return of the belt tablets 12. as already described above.

Drainage of the multilayer press 3, i.e. the ejection of the pre-compressed article takes place either by means of the belt tablets 12 when they are introduced into the press or by means of special ejectors 32 arranged next to the press, which are shown in the construction example according to FIG. These are connected to a common transfer arm 32a and interleave in front of the belt tablets 12 on the layers of the presser 3 opened on both sides and push the pre-compressed sheets into the emptying rack 4. In front of the emptying rack 4 are used rollers 33 which grip the plates on the same principle. .

Figures 2 and 3 show the transfer of the goods blocks 14 according to the invention from the spreading belt 5 to the accelerating belt 6 and from the accelerating belt 6 to the belt tablets 12 without the conveyor belts 5 and 6 being pushed over the transition points. Here, it is provided that first, in order to transfer the goods blocks 14 separated by the spreading belt 5 from the spreading belt to the accelerating belt 6, the spreading belt 5 has a transfer cam 7 extended to the reversing cylinder 34 of the accelerating belt 6. during the movement of the goods blocks 14 backwards against the transport direction and then again forwards. The lowering of each block of goods 14 from the acceleration belt 6 to the belt tablet 12 takes place in such a way that the delivery cam 8 of the acceleration belt 6 moves in the vicinity of the belt tablet 12 in each case. It can be seen from Figure 1 that the spreading belt 5 comprises a support belt 20 and a transfer belt 21, whereby only the transfer belt 21 is guided around a transfer cam 7, the front edge of which is chamfered according to the guide 11 69267 of the conveyor belt 6. It can be further seen from Figure 2 that the rear conveyor belt 6 is guided at the reversing cylinder 34 over the receiving table 36 and that the transfer cam 7 is steplessly rounded so that it is located very close to the receiving edge of the receiving table 36. The transfer of the article blocks 14 from the acceleration belt 6 to the belt tablet 12 is shown in detail in Figure 3, in which a receiving table 40 is arranged in connection with the belt tablet 12. Otherwise, the kinematics are implemented as described above in connection with Figure 1.

Claims (3)

12 69267 An apparatus for producing single- or multilayer particleboards, fibreboards, etc., which apparatus comprises a sprinkling station, a filling rack, a multilayer press, a discharge rack, and a conveying means connecting the sprinkling station and the filling bracket, the conveying means consisting of a spreading belt a speed-accelerating accelerating belt with a reciprocating delivery cam, a continuous pre-press separating the pre-press and the freight track into the goods blocks in connection with the sprinkling belt, and the filling rack is provided 12) the belt bases (13) are guided in the region of the dispensing cam (8) over the receiving table (40) forming part of the belt tablet and that the dispensing cam (8) is led steplessly very close to the receiving table (40). Device according to Claim 1, characterized in that the drive shafts (26) of the belt bases (13) can be connected in layers to the drive mechanism (24) during the lifting and lowering movement of the filling rack (2). Device according to Claim 1, characterized in that gears (29) are arranged on the drive shafts (26) of the belt bases (13) via a freewheel and racks (29) are arranged on the filling bracket (2) and / or the multilayer press (3) for the gears. chains so that, under the action of the free clutch, the belt bases (13) are at rest when the belt tablets are introduced into the multilayer press (3), but are driven by the return movement. li