FI73164C - KONTINUERLIGT ARBETANDE PRESS. - Google Patents

Description

»Jfe, ® ADVERTISEMENT n-? a r * [B] (11) UTLÄGGNINGSSKRIFT 73164 (51) Kv.ik.VmtCi.4 B 27 D 3/04, B 30 B 5/06

S U O M l-FI N LAN D

(Fl) (21) Patent application - Patentansökning 3279/72 (22) Application date - Ansökningsdag 21.11.72

Patent * and National Board of Registration (23) Start date-Giitighetsdag 21.11.72

Patent-och registerstyrelsen (41) Tuiiut to the public - Biivit offemiig 23.05.7? (44) Submission and hearing. date of publication, - 29.05.87

Ansökan utlagd och uti.skriften publicerad (86) Kv. Application-Int. trap (32) (33) (31) Privilege claimed - Begärd priority 22.11.71 05.10.72 Federal Republic of Germany Förbundsre-publiken Tyskland (DE) P 2157746.8, P 2248760.1 Verified-Styrkt (71) Eduard Kiisters, Finkenweg 18, Kreink Forstwald,

Federal Republic of Germany, Förbundsrepubliken Tyskland (DE) (72) Karl-Heinz Ahrweiler, Krefeld, Valentin Appenzeller, Kempen / Ndrh.,

Kurt Quoos, Krefeld, Eduard Kiisters, Krefe 1 d-Forstwa 1 d,

Federal Republic of Germany Förbundsrepubliken Tyskland (DE) (74) Leitzinger Oy (54) Continuous press - Kontinuer1igt arbetande press

The invention relates to a continuous press in which a web of material is pressed between two endless shape paths extending over the width of the material web, and in which the shape paths and their upper and lower paths are pressed. endless roller chains moving between the side support structures,! . whose rollers transfer pressure and possibly heat from the support structures to the formwork, wherein the roller chains rotate along closed paths against the material path in perpendicular longitudinal planes, and wherein the roller chains are assembled by connecting shafts with two or more rollers in pairs.

In particular, when such presses are used to produce sheet metal tracks under high pressing pressures, e.g. laminated sheets of thermosetting plastics or correspondingly laminated chipboards, there are difficulties in arranging a smooth flow of the rollers.

Namely, at high pressures it is necessary to support the contour paths at the smallest possible support distances due to their necessary _____ 1.

2 73164 flexibility to avoid harmful ripple of contour lines between individual support lines. However, the small support spacing requires a small roller diameter for the roller support, in which case thin roller bars are required for the track widths of 2 to 2.5 m in question.

In this case, there is a risk of the roller bars bending and partially skewed, which means that they no longer roll properly but cause considerable abrasion, leading to wear and the consequent uneven compression pressure and heat transfer, as well as an increase in the required driving force.

In order to avoid these drawbacks, it has been proposed, in accordance with German publication 10 04 368, to divide the rollers into a number of short rollers and to provide each roller with its own control means in which the rollers are chain-linked. No other details are provided. Thus, embodiments appearing in French Patent 1,469,225 and Swiss Patent 327,433, Figures 3-5.

In French patent publication 1,469,225, instead of rollers extending over the track width, individual rollers arranged side by side across the track are used, of which two adjacent rollers relative to the track are each connected by coupling pins. Longitudinal rows of tie loops are arranged between adjacent rollers.

Swiss Patent Publication 327,433 provides shaft pins extending across the width of the track, each having a plurality of short rollers with transverse distances corresponding to the length of the roller. The rollers on the next axle pin extend into these intermediate spaces. The shaft journals are connected to each other in the direction of travel by tie-down rails arranged between successive rows of rollers.

However, no decisive progress has been made with these arrangements in achieving a smooth overall flow of the rollers.

3 73164

A number of rollers arranged side by side in the transverse direction of the track, connected to each other by pins, have an even stronger tendency to bend than a through-roll. In addition, all the rollers are suspended from each other by rows of tie loops so as to create a massive roll field. Thus, the local position or rolling error of an individual roll is not limited to that roll, but causes uneven travel in the surrounding roll field.

Inevitably, in the mentioned embodiments, there is also the disadvantage already found in German publication 10 04 368 that the tie rails or rows of rails arranged between adjacent rollers in the transverse direction of the track cause breaks in the contact points between the forming steel strip and the rollers. These breaks form unsupported tracks along the length of the track. For certain components, such as plastic laminates, laminated chipboards must have the highest possible compression pressure as uniform as possible. In addition, the rollers of the device in question transfer not only the compression pressure, but also the heat forming belts of the heated support structure and, at the same time, the curable mass to be compressed between them. Known devices of this type inevitably provide a strip-like compression pressure and heat transfer which, with said ingredients, does not lead to perfect products.

The object of the invention is to provide a roller chain of the type mentioned at the beginning, in which, while ensuring the smooth running of the rollers, the smoothest possible transfer of compressive pressure and heat is achieved.

This object is achieved according to the invention in that the binding loops are superimposed exclusively in the intermediate spaces of the rollers on each axis and that successive roller intermediate spaces are arranged in the transverse direction of the roller chain displaced relative to each other for several periods of multiple binding links overlapping in the same direction.

4 73164 that independent flat plate roller chains are placed immediately next to each other.

Since the chain mat consists of adjacent separate roller chains of constant width and independently movable, minor running defects in one roller chain do not affect the adjacent roller chain and do not interfere with its running behavior. When, for some reason, the roller of a roller chain is subjected to a force which tends to slightly advance or lag behind others, the roller of the adjacent roller field, i.e. the adjacent roller chain, will no longer be forced into an oblique position but will remain insensitive to other discrete chains. By separating the roller mat into a plurality of separate chains adjacent in the transverse direction of the track, all the disadvantages caused by the co-operation of the rollers over a larger transverse distance of the track have been avoided.

Since the binding loops are located exclusively between the rollers of the individual roller chains, it has become possible to arrange the ends of the rollers of adjacent individual roller chains directly opposite each other, whereby these areas are seamlessly connected to each other in the transverse direction of the track. There are no tie loops on the outer edges of the individual roller chains that would cause the ribbon-supported tower transition points.

By laterally displacing the joints between the rollers of each individual roller chain, it is achieved that there are no points in the transverse direction of the track which would be constantly free from the effect of the rollers. Instead, the space of action between two adjacent rollers is always covered by the following rollers. In this case, it is not necessary for the space between the two rollers to be completely covered by the next roll. This can only be done by means of several successive laterally displaced rollers. The roller chain according to the invention can be implemented in several different embodiments, the features of which appear from the appended claims 2-7.

In the following, some embodiments of the invention will be described in more detail with reference to the accompanying drawings.

Figure 1 shows a side view of a press for the continuous production of particle boards, laminates and the like.

5,731 64

Fig. 2 schematically shows a vertical longitudinal section of the device according to Fig. 1.

Figure 3 shows a cross-section of the device according to Figure 1 on a slightly enlarged scale.

Figures 4-6 show embodiment examples of roller chains according to the invention.

Figure 1 shows a press for the production of particle board, laminates, mineral bonded building boards, sintering of webs from polytetrafluoroethylene, etc. It comprises an upper forming track 1 made of a steel sheet about 1-1.5 mm thick and a similar lower forming track 2. 1, 2, in the longitudinal distance indicated by reference numeral 3, a track 4, which arises from the loose mass 4 ', is compressed from the above-mentioned working materials.

The upper shaping path 1 rotates around rollers or drums 5, 6 arranged transversely to the path 4. The drum 6 is mounted on a fixed rack 7 and the drum 5 is mounted on a rack 9 which pivots about an axis running across the track 4 in a support bearing 8 in the base. The rack 9 is moved by a hydraulic cylinder 10 and thus tightens the form track 1.

Correspondingly, the form track 2 passes over and around the transverse drums 11, 12 of the material path, of which the drum 11 is mounted on a fixed stand 13 and the drum 12 on a rail-movable stand 14. A hydraulic cylinder can move the stand 14 longitudinally and in this way tighten the form track 2.

The contour paths 1, 2 pass through the device in the direction indicated by the arrow 16 so that, as shown in FIG. The loose mass 4 'introduced by the devices 73164 6 is drawn into the longitudinal area 3. The protruding and compressed track 4 is taken out from the left end of the shaping track 2 according to Fig. 1 by suitable equipment (not shown). The longitudinal part 3 has an upper support structure 17 arranged inside the mold track 1, which cooperates with a lower support structure 18 made inside the lower mold track 2. The support structures support the track-side sides of the shaping paths 1 and 2 against the material path 4 and press its surfaces with great force.

The support structures 17, 18 in each case consist of individual supports 19, 20 arranged in pairs against each other, above and below the shape paths 1, 2 and the material path 4 (Fig. 2). On the side of the track, the supports 19, 20 are fastened to each other in pairs on the outside of the track so as to form uniform support members for the transmission. As shown in Figures 1 and 3, the fastening may be by strong spindles 21 acting between brackets 22, 23 connected to the end plates 24, 25 of the brackets 19, 20. The spindles 21 may also be mechanically adjustable (not shown). . Instead, the clamping force can also be provided by a hydraulic cylinder. The lower supports 20 transmit their forces through pressure pads 56 filled with hydraulic medium, which ensure a uniform pressure effect over the width of the track also in pressurized bent supports 19, 20. Each pair of supports 19, 20 may be provided with a pressure pad or this may be common to several successive supports. Between the supports 19 or the pressure pads 56 and the molds 1, 2 there are strong plates 26, 27 which transmit the force exerted by the individual pressure members 19, 20 evenly to the molds 1, 2 and which contain channels in which heating elements are arranged or through which heating medium is passed .

Between the mutually turned sides of the plates 26, 27 and the shape tracks 1, 2, roller chains are arranged, on which the shape tracks 1, 2 roll relative to the plates 26, 27 and rotate endlessly in a vertical longitudinal plane around the plates 26, 27. Roller chains will be described separately with reference to Figures 4-6. The rollers of the roller chains transfer both the pressure of the plates 26, 27 and the heat to the forming paths 1, 2 and thus to the material web 4.

7 73164

After the roller chains have reached the end of the longitudinal area 3, they can be led back inside the actual compression zone, i.e. between the brackets 19, 20 and the plates 26, 27, as shown in Figure 2 in connection with the plate 26. There is also the possibility of guiding the roller chains from the outside around the support structure, as seen in Figure 2 in connection with the support structure 18. Several individual plates formed in the same way as the plates 26, 27 can also be connected in succession along the longitudinal region 3. For example, it could be expedient to separate the plates 26 'forming the oblique inlet region 57 from the left part 26 in Fig. 2 and to use two an array of rollers that rotate separately around the plates 26 and 26 '.

Chains have also been developed in which there are no points between the rollers which would not be affected by the other rollers. One such chain 70 is shown in Figure 4. The chains include rectangularly bent tie loops 71 and have rollers 72, 73 of different lengths, which are arranged alternately in response to the rectangular bend so that the outer parallel delimiting surfaces 74, 75 run in the same plane relative to each other. However, the intermediate spaces 76 between the rollers in which the tie loops are located are arranged laterally zigzag with respect to each other due to the rectangular bending of the tie loops 71. As the chain 70 moves, the next roller 72 rolls over the intermediate space 76 between the rollers 72, 73, as shown in FIG. Since the adjacent chains 70 with their parallel boundary surfaces 74 and 75 can contact each other immediately, the complete pressing surface of the form tracks 1, 2 provided with such a chain arrangement is achievable.

Fig. 5 shows another embodiment in the form of a chain 80 with straight tie loops 81. However, these tie loops are not arranged in succession as a path running parallel to the direction of travel, but several of them are successively moved to the same side. Thus, for example, the loop 81a in Fig. 10 is moved upward relative to the tie loop 81. The tie loop 81b is again moved upward relative to the tie loop 81a. However, the tie loop 81c has been moved downwards again with respect to the tie loop 81b, and finally there are four more 73,741 64 each time the tie loop has been moved down to the tie loop 81d, from where the right-hand shifts take place again upwards. The entire row of tie loops 81, 81a, etc. thus passes inside the chain 80 in a zigzag manner so that the space left by one of the two rollers is covered by one of the following rollers.

In addition to the row of tie loops 81, a row of tie loops 82 is provided, the tie loops of which are displaced in the opposite direction to the longitudinal center plane of the chain 80. Each roll of the roller chain 80 thus consists of a roll divided into three parts, the width of the parts of which varies periodically and which together form one separately used single roller chain with parallel delimiting side surfaces 83, 84. The three parts of the roller are held together by a shaft 85 with a head 86 in the recess 87 and which does not extend beyond the limiting surfaces 83, 84.

The end faces 83, 84 of the adjacent chains 80 contact each other so that no gap is left at these points. Subsequent chains roll periodically over the gaps between adjacent parts of the rollers so that the effect of the pressure on the pressure surface or the form tracks 1, 2 is uniform.

Fig. 6 shows a third embodiment of the chain, in which the disadvantage that there are strip-shaped areas which are not affected by the pressure is avoided. The chain 90 is formed in the same manner as the chain 80 only with the difference that the tie loops 91a, 91b, 91c are always moved to the same side with respect to the adjacent tie rail. The rows of tie loops thus pass obliquely parallel through the bounded chain 90. The merging of the end faces 97, 99 with the plane of the other end faces is achieved by changing the length of the roll parts accordingly. After a certain number of rolls, the upper row of tie loops 91 has come close to the edge so that the roll part 92 in question is very narrow. At this point, the tie loop tape 91 is cut and a wide roll portion 93 extends over the entire length of the preceding roll portions 92 and 92 'and joins the next row of loops 96. Figure 11 shows the tie loop row 96 away from the side surface of the chain 90 at the lower edge of the chain 90. before the roll comprising the roll part 92 73164, the length is equal to the roll part 93 ", between which a new row of loops 98 begins. On the other side, the roll part 93 'joins the row of loops 96. Thus, a transition has taken place in which the previous loops 91 and 96 have been replaced by loops 96 and 98. With respect to the structure of the side surfaces of the rollers, the chain 90 corresponds to the chain 80.

In all the chains 70, 80, 90 the outer roller parts are freely mounted in a row of side loops, which only makes it possible for the adjacent, separate roller chains to join each other directly on their side surfaces.

A continuous press with the roller chains described above is a preferred embodiment of the invention for cases where the surface is particularly evenly supported, rolled or touched or has heat transfer.

Claims (7)

A continuous press, in which the material web (4) is pressed between two endless webs (1, 2) extending over the width of the web, and in which endless roller chains move between the webs and their upper and lower support structures (17, 18), the rollers transmitting pressure and possibly from heat support structures to formwork, wherein the roller chains rotate along closed paths against the material path in perpendicular longitudinal planes, and wherein the roller chains are assembled by connecting shafts (85) with two or more rollers in pairs, characterized in that the tie loops (71, 81, 96, 98) are superimposed exclusively in the intermediate spaces (76) of the rollers (72, 73, 83, 84, 92, 92 ', 93', 93 ") on each shaft, so that successive roller spaces are arranged offset relative to each other in the transverse direction of the roller chain possible in the same direction overlap following periods of several tie loops of interleaved tie loops with the exception of the reversal points (81b, 81d) and that the independent flat-width roller chains (70, 80, 90) are arranged immediately next to each other. Press according to Claim 1, characterized in that the central part of the binding loops (71) is arranged in a plane perpendicular to the movement between the rollers (72, 73), and the end portions of the binding loops in the direction of movement are bent at right angles to the central part. A press according to claim 1, wherein the axes of successive rollers are connected by straight tie loops, characterized in that a plurality of successive tie loops (91a, 91b, 91c) are arranged in an overlapping sequence relative to each other, which loop approaches the other side of the roller chain. Press according to Claim 3, with more than one row of tie loops, characterized in that a new row of tie loops (98) starts close to the side of the roller chain (90) from which the tie loop rows diverge due to the overlapping of the individual tie loops. the edge of the roller chain, while on the other side of the roller chain, after a corresponding number of rolls, the row of tie loops (91) closest to the edge ends. Press according to Claim 3, characterized in that the overlapping direction of the row of tie loops (81) is reversed after several successive rollers so that the row of tie rail (s) (81) runs inside the roller chain in a zigzag pattern. Press according to Claim 5, characterized in that the roller chain has two rows of loops (81, 82), the binding loops of which are located at the same point, overlapping in opposite directions. Press according to one of Claims 1 to 6, characterized in that the ends (86) of the roll shafts (85) are; embedded inside the end faces of the outer rollers. 12,731 64