FI76515C - ANORDNING FOER PRESSNING AV FIBERCEMENTPLATTOR. - Google Patents

Abstract

1. Apparatus for the compression of fibrous-cement slabs (1), which initially lie in the form of a fibrous-cement mat centrally on a pressing base (2), with symmetrically arranged lateral handling surfaces (3) and between the latter, and are transported into a compression station (4) of a press (5) and thereafter are transported as compressed plates out from the compression station on the pressing base by means of a conveying device (6), which to receive the pressing bases (2) with the plates (1) has two conveyor belts (8) running parallel to each other along the compression station (4), on which belts the pressing bases (2) come to be transported lying freely, a drive device (10) being associated with the belts (8), characterized in that the relative distance and the width of the belts (8) correspond to the distance and the width of the handling surfaces (3) of the pressing bases, and that the belts (8), which are both identical, are provided with engagement sections (9) which are fixed to the belt and follow each other at regular intervals along the length of the belts, the drive device (10) having engagement elements (11) which are constructed corresponding to the engagement sections (9) and engage in the engagement sections, and being designed for synchronous movement of the two belts (8), i.e. at the same speed at the same time.

Description

1 76515

Apparatus for pressing fiber cement boards

The invention relates to an apparatus for pressing fibrous cement sheets, which sheets are first in the form of a fiber cement mat in the middle of a press base between its symmetrically arranged lateral treatment surfaces and are introduced into the press pressing point and then pressed on the press base out of the press base by means of conveying means. there are two parallel conveyor belts running along the pressing point, on which the pressing bases run freely, whereby a drive device is arranged for the belts, that the distance and width of the belts correspond to the distance and width of the working surfaces of the pressing vessels and that the belts are both provided in the same length at regular intervals at successive gripping points integral with the strap, the gripping means being respectively formed in the drive-20 and, the gripping point and the drive is designed to move both belts synchronously, i.e. at the same speed at the same time that the conveyor belts are toothed belts whose regularly fitted teeth form gripping points, the device comprising drive gears toothed according to the timing and shape of the toothed belts, forming the gripping elements of the drive, and only one half of the toothed belt is toothed.

30 In a presently continuous process for the continuous manufacture of fiber cement boards, the prefabricated fiber cement mat is transferred to a pre-arranged pressing substrate. The loaded substrate is transported to the press at a particular pressing point and pressed there aligned with the mat. 35 After the pressing operation, the base and the pressed plate in it are transported out of the pressing point. In this connection, the plate 2 76515 is removed from the base and the empty base is transported back to the beginning of the device, where it is reloaded with another compressible fiber cement mat. Usually, a certain number of pressing substrates rotate in the process at a speed of, for example, 5 3 m / sec and for a period of, for example, 12 seconds. Such a device then operates automatically and, for safety reasons, cannot be touched by a human hand. Production must take place continuously throughout the day. As a result, high demands are placed on the reliability of the pressing trays and the loaded pressing trays 10, especially when it comes to precise alignment at the above-mentioned processing stations of the device. Transport is also difficult to carry out, because the rotating press trays are mainly damaged during pressing and have to be transported more or less deformed, for example no longer completely smooth.

An attempt was made to solve the transport by using chain transport equipment. However, these are less satisfactory. Due to the further increase in the clearance of the chain joints, which takes place in a different way and mainly due to unpredictable wear, it is not technically possible to move the pair of tow chains in exactly parallel. In addition, often uneven, damaged substrates must be held in place by chain grippers with complex grippers. Precise alignment is hardly possible in these conveyors, but the pallets are often tilted relative to a particular conveying path. For all these reasons, the process is disrupted and production is interrupted until the damage or cause of the damage has been eliminated.

30 Similar difficulties arose when an attempt was made to equip a transport device with conventional conveyor belts. In this case, the parallel, synchronized movement of the pair of belts was not achieved, mainly due to the unavoidable slippage between the drive and the belt. Slippage or tilting of the platforms also occurred during starting and braking, making accurate positioning impossible.

3,76515

Finally, reciprocating loading wagons between the two stations are also possible, such as are known, for example, from DE patent application 3,146,813. This transport device appears to be technically expensive.

It is an object of the invention to provide an improved conveying system for the device mentioned at the beginning compared to the hitherto known ones. In this case, the aim is specifically to avoid tilting or slipping of the transportable presses and thus to ensure their precise, economical positioning at the various processing stations. The transport device must be relatively simple and also applicable to devices with two presses with two superimposed pressing points.

In order to solve this task, it is proposed according to the invention 15 that the toothed side of the toothed belt is on the side of the transportable pressing base, which is transported freely on the toothed belts.

A significant advantage of the present device, in which only one side-20a of the toothed belt 8 facing the transportable pressing base is toothed, is that the outwardly engaging drive gears achieve both conveyor belts and synchronized conveying, as well as relatively high adhesion between the conveyor belt and the conveying press. ensuring non-slip support on the conveyor belts on the press vessel 25. Toothed belt smooth inner side takes care of the good sliding properties with respect to the OH jausalustaan.

Thus, a precise synchronous movement of the two conveyor belts with respect to each other is achieved, so that a tilt-30 cannot occur and a trouble-free transport with precise positioning at the respective station is obtained.

The toothed belts used in the device according to the invention are available in shops and the conveying device provided with them operates reliably and practically without maintenance.

4,76515

The device according to the invention and its advantages will be described and explained in more detail below.

The description relates to the following figures in the drawing:

Figure 1 is a diagrammatic side view of a device with conveying devices according to the invention for pressing fiber cement boards.

Figure 2 shows a detail of a transport device.

Figure 3 shows the waiting position of the transport device.

The device shown in Figure 1 is used for pressing fiber cement-10 sheets 1. As shown in Fig. 2, these sheets are first in the form of a fiber cement mat on a press base 2 having symmetrically parallel lateral treatment surfaces 3. The sheet 1 is thus between the treatment surfaces 3. The base 2 is perforated in the area covered by the plate 1 15 during compression to remove the liquid to be squeezed out of the mat. When crimping corrugated fiber-cement sheets, the substrate 2 is corrugated in this region. The working surfaces are flat and in the same plane at the time.

By means of the conveying device, generally indicated by reference numeral 6, the base 2 and the plate 1 therein are conveyed to the pressing part 4 of the press 5 and, after pressing, the plate 1 and the plate 1 therein are conveyed out of the pressing point 4.

The pressing point is formed by pressing punches 7, which cover the size of the plate 1 so that the processing surfaces 3 of the base 2 are outside the pressing point and parallel to it when the plate 1 and the base 2 are placed in the pressing point 4.

For receiving the separate pressing trays 2 and the plates 1 thereon, the conveying device 6 has, as very clearly shown in Fig. 2, two conveyor belts 8.

They pass parallel to each other along the pressing point 4 through the press 5. The distance between the strips 8 and their width 35 correspond to the mutual distance and width of the treatment surfaces 3 of the pressing substrates 2. In their longitudinal direction, the two strips 8 are similarly provided with gripping points 9 arranged in succession at regular intervals and fixed to the strip 8. These conveyor belts 8 are associated with a drive device 10 with gripping parts 11 corresponding to the gripping points 9 and gripping the gripping points 9. 10 is made for moving the strips 8 synchronously. It is also used to move the strips 8 at the same speed and at the same time.

As mentioned in this example and illustrated in Fig. 2, the conveyor belts are formed as toothed belts 8, the teeth 9 of which are arranged regularly in the longitudinal direction form the gripping points. The drive device 10 has a drive gear 11 associated with each toothed belt 8, which is toothed according to the division of the toothed belts 8 and the tooth shape 15 and forms said gripping part. As can also be seen from Figure 2, only one side of the toothed belt 8 is toothed and the other side is smooth. It can be seen that the toothed side of the toothed belt 8 is on the side of the transportable pressing base 2 which is freely transported on the toothed-20 belts 8.

In order to make the drive of the toothed belt 8 absolutely non-slip, the toothed belt 8 is guided by means of two pivot rollers 12 so as to form a loop around the drive gear 11. The degree of rotation is then about 180 °. At the same time, the reversing rollers 12 act as tensioning rollers for the toothed belts 8.

It has been found that a toothed belt made of reinforced plastic is best suited for this conveying device. The flat side of the belt must have good sliding properties with respect to the guide base 13 which is arranged to guide it and is, for example, made of plastic. Such a toothed belt is commonly marketed. It is also conceivable that a liquid film, e.g. a liquid layer formed of a hydrostatic structure, is arranged between the toothed belt 8 and the guide base 13, so that in the present case a non-wearing state is reached.

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The synchronization of the two toothed belts forming a pair of co-operating is simply achieved by the drive of the associated pair of drive gears being a common shaft connected to the drive motor M.

In the conveying device described here, both toothed belts 8 move absolutely synchronously and uniformly, i.e. the second toothed belt does not move momentarily away from the mutual point synchronization with respect to the other toothed belt. However, the relatively heavy press base 2 10 and the plate 1 therein are free to slide on the toothed belt and cannot move and / or tilt relative to the other due to momentary delay or premature movement of the second belt, so that it can be precisely positioned in the desired transport path.

In order to increase the adhesion between the conveyor belt 8 and the pressing base 2, the opposing and contacting surfaces of the handling surfaces of the conveyor belts 8 and the pressing bases 2 must be provided with an adhesive upper surface; in the case of toothed belts, this is sufficient only for concept-20 surfaces. In this case, the pressing base is made to adhere to the strips securely without slipping.

In order to be able to adjust the conveyance in different parts of the conveyor track in a different way and as a desired function, the conveying device 6 is divided into three parts: a part 6 * which goes to the press 5

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25, a part 6 is connected in front of it, which acts as a

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Mana, followed by a part 6 which acts as a discharge 1 2 3 station. Each of these three parts 61, 6, 6 each has a pair of conveyor belts 8, 8, 8 in its area. Each pair is separated from the other side of the drive and equipped with its own, separately controlled and adjustable drive 101, 10 ^, 10 ^. Each drive is powered by its own, separately controlled and adjustable DC motor M.

The device shown in Figure 1 is provided with a press 35 5 with two superimposed pressing points

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4 and 4. This press compresses two 7,76515 plates at a time in a single operation. Each of the pressing points 4 and 4 is associated with a conveying device 6. Thus, with respect to the conveyor, the conveying vessels 2 and the plates 1 are conveyed as one lower and one upper layer simultaneously and in the same course. The upper layer is shown in the figure in broken lines.

The prefabricated fiber cement mats are placed on the pressing substrates at the loading station 14. The substrate is then on the conveyor belt 15 of the station and waits there until the mat is placed on it.

The pre-compressed fiber cement sheets are taken out of the press trays to the unloading stations 16, in the left figure, on top of the station conveyor belt 17. The conveyor belts 15 and 17 of the loading and unloading station are in the plane of the above-mentioned lower conveying layer.

15 Each subsequent loaded pressing platform from the loading station is raised from the level of the lower layer to the level of the above-mentioned upper layer and, after pressing, is lowered to the level of the lower layer. This takes place in the area of the waiting station 6 and the unloading station 6. Figure 3 shows the waiting and discharge station for this purpose in more detail. The conveyor belts 8 of the upper layer are mounted on the frame 20 so as to move laterally so that the mutual distance between the belts exceeds the width of the pressing base. When the strips are in this diffuse position, the press base can be transported vertically between them. This vertical transport takes place on a lifting table with a horizontal table top 21 which can be turned by a lifting device 22 to an upper position, above the level of the upper floor and to a lower position below the level of the lower floor.

30 The device operates during the following operating periods:

The first press was loaded on a mat in connection with the conveyor belts of the loading station 15.

Simultaneously moving the strips 15 and the associated strips 2 2, the base is placed on the bottom strips 8 at the waiting station 6 y 35.

The table top 21 is in its lower position.

2 8 76515

The upper conveyor belts of the waiting station 6 are spread and are in the position shown in the upper right of Fig. 3, so that the pallet can be transported between them.

The table top 21 goes into its upper position and raises the base 5 above the level of the upper layer.

The upper strips return and are below the substrate handling surfaces. This position can be seen in Figure 3 at the top left.

The table top 21 returns to its lower position, and the first 10 bases remain on top of the upper strips.

The second, meanwhile loaded platform is driven to the lower floor of the waiting station 6.

The pressing points 4A and b of the press 5 open.

By simultaneously moving the conveyor belts 8 and 8 of both layers 2 and 15, the first and second loaded pallets come to the respective pressing points.

The pressing operation is performed and the pressing points 4 ^ and 2 4 * are opened.

By simultaneously moving the strips 8 · * · and the associated strips 8 of both layers 20, the first and second substrates simultaneously move to the unloading station 6 ^ and are positioned there. At the same time, the strips 8 and 8 convey the next two waiting bases in both layers to the pressing points 4 and 4.

The substrate in the lower layer is driven to the unloading station 16 by simultaneously moving the lower strips 8 and the associated strips 17 and the pressed plate is removed from the substrate.

The empty platform is transported along a certain transport path 30 back to the loading station 14.

The table top 21 at the unloading station 6 ^ goes to its upper position and then lifts on the upper strips until now, being the base up.

The upper strips thus released from the load are moved apart from each other, and the table top 21 and the pressing base therein then return to their lower position.

9 76515 In this way, the base is moved on the strips 8 of the lower layer of the unloading station 6.

The upper strips return to their narrower position and are thus ready to receive the second compression-5 substrate.

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Simultaneously moving the lower belts 8 and the associated belts 17, the top-down shifted pallet is driven to the unloading station, and after removing the fiber cement sheets, the empty pallet is conveyed along the above-mentioned conveyor track 10 back to the loading station 14.

The device operates continuously and the transport of the pallets described above is adjusted to suit the pace of the press 5. In half of the pace of the direction parallel to the loading and unloading station platforms 14 and 16 are also always followed by a 15-van transfer substrate layer to the other stations 6 ^ and 6 takes place within half a stroke.

The conveying devices at the stations 14 and 16, i.e. the conveyor belts 15 and 17 and the drive devices 18 and 19, are also made according to the idea of the described invention. The same 20 devices have also solved the return of empty trays.

Claims (5)

An apparatus for pressing fiber cement sheets (1), which sheets are first formed in the form of a fiber cement mat on the basis of a press support (2) between the associated treatment surfaces (3) located on this side and transported into a press (5) to a press member (4) and thereafter pressing compressed discs on the press support out of the press means by means of a conveying device (6), which shows two mutually parallel conveyors (8) running along the press (4). receiving the press substrate (2) and the discs (1), on top of which conveyor belts the press substrate (2) is freely transported, whereby a drive device (10) is arranged for the belts (8), that the distance and width of the belts (8) correspond to the treatment surfaces ( 3) spacing and width, and both bands (8) Mr. in the same set are pre-arranged in their longitudinal direction with regular spacing one after the other, the strap fixing engagement means (9) fixed, the drive device having the corresponding set which is included. the gripping straps formed, in the gripping gripping engagement elements (11) and wherein the drive device Mr is designed so that it drives both the straps (8) synchronously, ie at the same speed simultaneously, that the conveyor straps Mr tooth strap (8), which are regularly arranged teeth (9) forming the engagement pulley, the device comprising drive cogs (11) which Mr cogged to correspond to the distribution and cog shape of the cogs, which drive cogs constitute the driving member engagement member, and that only one side of the cog (8) Mr toothed and the other side Mr toothed , it may be noted that the toothed side of the toothed belt (8) mr on the side of the transportable press substrate (2) is the side that is freely transported on top of the toothed belt (8). Device according to claim 1, characterized in that the gear belt (8) for operation Mr 35 is guided by two switch rollers (12) to form a loop around the drive gear (11).