DK144207B - PRESSURE TO EXERCISE A SURFACE PRINT - Google Patents

Description

144207

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a press for exerting a surface pressure on a longitudinal section of a continuous web, in particular for continuous production of sheet material to be formed under pressure and possibly heat, in which the web is controlled between endless mold belts running in the web direction of travel. and extending over the width of the web, and in which press there are rotating rollers between the molding belts and plates disposed above and below the belts in a support structure, which circulate in an endless sequence in a longitudinal plane perpendicular to the web, and transfer the working pressure from the support structure to form belts.

US Patent No. 2,142,932 discloses a press of this kind for the manufacture of plywood sheets, in which press mold belts are formed by a series of flexible, cross-section steel strips supported against the support structure by rod-shaped rollers extending cross the support width and guide laterally on chains. The rollers 20 have a relatively small diameter and are close together so that no noticeable bending of the steel strips occurs. The rollers transfer heat from the heated support structure to the web between the mold belts. A similar construction, but with continuous 25 form belts, is disclosed in German Patent No. 923,172.

When one has to produce such presses under particularly high pressure, e.g. laminated sheets of thermosetting resins, difficulties arise with the proper running of the rollers.

30 At high pressures, because of the form belts, because of their necessary flexibility, there must be a particularly small support distance to avoid damaging bulges in the mold belt between the individual support points or lines. However, a small support distance 35 requires a small rolling diameter for a roller support, whereby very long and thin scroll bars are obtained at the 2-2.5 m web widths that come up.

Despite the extremely small rolling distance, 220207 forced bends, as with roll diameters of 10-20 mm, and the usual steel band thicknesses of 1-1.5 mm, can take noticeable sizes of more than hundreds of millimeters .

5 A slight deflection at a particular location of the shape belt is abolished by the projection of the shape belt when the place comes under the next roll, but immediately reappears behind the roll. All such bends are pushed longitudinally through the molding belt.

10 As this is not an ideal stiffness apparatus, this displacement of the deflection results in exerting forces from the conveyor belt conveyed on the rollers which are subjected to these forces over their entire length and therefore tend to is deflected in the roller plane in such a way that the rollers in the area between the lateral chains come slightly ahead of them in the direction of movement of the mold belt.

Such a movement also occurs by irregular loading of the mold belts over the width of the web.

The material web to be treated, namely chipboard or the like, is compressed by material placed on the lower molding belt. Such material supply can never be completely uniform, since there will always be zones that counteract a compression to a certain height with greater resistance than neighboring zones. In the zones with the higher pressure, the shape belts between the rollers receive a greater deflection than in the neighboring areas. This greater deflection runs more strongly against the rollers and, in order to be overcome by the pull of the molding belt, requires greater forces acting on the rollers as shocks and pulling them more forcefully in the regions of higher pressure than in the neighboring regions. This effect also tends to deflect the long thin rolls in the roll plane.

The rotational bending action that occurs with each bend of the roll means a substantial duration load on the roll.

3 U4207

It is particularly unfortunate that a bent roller has very unfavorable driving characteristics due to some sections of the roller not being exactly perpendicular to the direction of travel with their axes.

5 The rolling direction of these sections is inclined with respect to the longitudinal direction of the molding belt and the supporting structure. In the case of unobstructed rotation, this would mean a lateral displacement of the roller relative to the molding belt and the supporting structure, and at the same time a lateral displacement thereof relative to each other. However, this displacement is prevented by the control of said elements of the machine, possibly under large forced influences. Shape belts and support structures are thus held in position relative to each other, and the rollers are held laterally between them. The individual small discs, from which you can imagine the curved roller constructed, will in certain areas run oblique with respect to the track, but can only run straight ahead. A clean scroll is not possible in this situation. On the contrary, the transport of the mold belts in relation to the supporting structure can only take place in such a way that the rollers in relation to the abutment surface are constantly shifting slightly, ie. is assigned a corresponding friction.

In addition, the roller circumference in places where the rollers rotate correctly and in other places where the roller axis is inclined does not have the same length, so that the respective places on the rollers at a certain length of travel travel at different angles, ie. twisting in relation to each other. The more inclined the roller 30 is in one place, the more likely it is to drive ahead of the other areas. This effect thus provides an automatic reinforcement of a deflection that has occurred once. However, due to the reaction forces of the roller, an equilibrium is set at which the torque from the circumferential frictional force arising from the different angles of rotation at the individual locations of the roller provides balance, and a further torsion during the friction in the roller is adjusted. areas in the circumferential direction relative to the contact surfaces are prevented. This phenomenon also leads to significant friction of the rollers due to a lack of proper straightening.

5 At high line pressures, these rolling errors play a significant and detrimental role as the rollers and belts wear at the constant friction. The repair of the pressure transfer area in a plant of the kind mentioned is a very costly feature when replacing mold belts, rollers 10 and possibly the support surfaces.

These are machines with 2-2 µm working width and 10-20 m length, which need to be practically renewed piecemeal and subjected to a longer down time, which of course also affects the 15 forward and subsequent processing stations at a continuous production line.

A reduction in the aforementioned wear phenomena is therefore of significant importance.

Of course, the aforementioned friction states also cause an increased power demand for the shape of the mold belts. A belt supported by a properly running roller can be pulled much more easily forward than one by which side forces must be overcome from inclined rollers. Since the tensile forces required to drive the molding belt through the pressure range, especially at high working pressures, are significant and can affect the molding belts up to their limit of elasticity, an improvement in the driving characteristics of a device of the kind mentioned is also of this aspect substantially essential. importance.

30 Finally, the requirements for the precision of the manufactured boards or boards are not unimportant. When the rollers or belts are worn and there are worn webs in the supporting structure, there can be thickness differences in the manufactured web which far exceed the permissible tolerances and which further impose an irregular load on the rollers and also a corresponding irregular heat transfer. .

From French Patent Specification No. 1,469,225, there is a continuous press of the kind mentioned above which, instead of continuous rollers across the width of the web, has single rollers arranged transversely of the web, of which two neighboring rollers transversely of the 5 path is connected by coupling pins. There are longitudinal chain chains lying between the neighboring rollers.

This configuration is not functionally different from the apparatus with the 10 rod-shaped rollers. As for the forces exerted on the rollers by the deflection of the mold belts, the conditions are essentially the same. However, by the effects of these forces, the roller arrangement according to French patent 1,469,225 is even more unfavorable than in the 15 previously mentioned writings, because the rollers are not designed in one and therefore have a corresponding bending resistance, but are weakened in places. where the coupling tabs are. Thus, a series of rollers which follow one another across the web more readily yields to a deflection.

In addition, there is an extra coupling through the inner chain of chains. The rollers not only hang laterally on each other, but also with the front and rear rollers, so that a mask-like roll field is obtained. Thereby, a local bearing failure by a single roller does not confine it to it, but affects the neighboring rollers via the coupling pins and chains, thus spreading to the surrounding roller arrangement.

Thus, in relation to the arrangement according to US Patent 2,142,932 30, the acquisition of the rolling errors is reinforced, since an error occurring in a single roll is immediately transferred to the neighboring rollers in front and behind.

While United States Patent 2,142,932 has rollers extending across the entire width of the web, and French Patent 1,469,225 has single short rolls connected to a cross-web interconnecting arrangement, U.S. Patent 3,120,862 discloses a press 6 144207 of the above-mentioned type, in which several rows of adjacent rows of parallel rollers running parallel to one another are used for support. Here, instead of flexible mold belts, link chains are used which extend across the width of the web and form a pressure surface and which do not bend between the supporting points of the rollers and at which there are no associated problems. For lateral control of the rollers in the runway, grooves have been machined in both the support structure and in the link chains in which the rollers run freely and support with their end faces on the flanks of the grooves. The rollers run in a first embodiment immediately after one another, thereby obtaining a substantial circumferential friction of the rollers towards each other.

15 The notes required to control the freely or substantially freely-rolling rolls of U.S. Patent No. 3,120,862 must, if they are to fulfill their task without edging or squeezing the rollers, be processed very accurately, and not only in the width, 20 but above all also in depth, as the depth of the notes immediately determines the thickness of the produced web, and since at different depths of adjacent notes a totally irregular pressure load and in particular heat transfer is obtained. Preparation of sufficiently accurate and rollable sheets suitable for sheet metal of 2.5 m width and 10-20 m length, which is considered as a supporting structure, e.g. for the manufacture of particle board, means a very large cost.

In order to avoid circumferential friction, according to a second embodiment between the rollers, a cage in the form of a roller bearing cage must be used which keeps the rollers at a distance.

This required distance does not matter at the non-flexible link chains according to US Pat. No. 3,120,862, but at the flexible molding belts is particularly undesirable first and foremost because it simultaneously reduces the amount of heat that can be transferred through the rollers per unit. unit area. Cages, too, are therefore unsuitable because they attack on the circumference of the rollers. When the cages transmit longitudinal forces, which, as practice shows, may be the case with the different flows of the chains, the frictional forces attack the rollers at the periphery and provide large braking moments. In addition, of course, the circumference of the rollers is worn and the cage. Here, game-5 also plays the greatest relative velocity of the circumference of a reel.

The invention aims to provide a press of the kind mentioned above, which ensures a proper run of the carrier rolls even at high working pressures.

This is achieved according to the invention in that the rollers in the longitudinal section are arranged in many transversely disposed intersecting paths, but independently of each other 15 roller chains movable in the path of the path, each consisting of at least one chain of plates with plate-shaped links connected by transverse shaft pins. , on which the rollers are rotatably mounted.

By the short length of the rollers 20 thus provided, it is obtained that the discomfort occurring in the bending of the rollers over the entire web width falls off by itself. The areas in which different pressures occur at that path are larger than the rollers are long, so that they are not subjected to appreciably different working pressures and thus also not to the bending stresses resulting therefrom. Of crucial importance is the independent movement of the adjacent roller chains. Small running errors in a roller chain cannot be transferred to the neighboring roller chain and affect its running or walking conditions. If for some reason a force acts on a roller in a roller chain, causing it to come a short distance ahead, then the adjacent roller area is forced, ie. they lie next to rolls in the next roller chain, not to assume an oblique position, but remain untouched by the failure of the second roller chain. By separating the roller arrangement across the web, all the disadvantages detailed in the foregoing 144207 δ and which result from the coherence of the rollers over a large length across the web are removed.

By placing the rollers in chains, it is achieved that the individual rollers in a chain are kept essentially parallel to each other and that they cannot be displaced laterally.

The chains thus take over the task of the grooves and cages according to US Patent No. 3,120,862. The chains can transmit significant longitudinal forces without thereby friction on the circumference of the rollers. In addition, the power transmission 10 takes place at a small radius on the shafts of the rollers.

The plates are preferably smooth on the side against which the rollers abut, ie. wherein the rollers rotate thereby transferring pressure and heat to the mold belts or web to be manufactured. The word "smooth" should mean that the assembled across the track and adjacent running surfaces of the individual roller chains form a stepless surface. Contrary to the prior art with notes to be machined separately, this surface as a whole can be manufactured with the required precision 20 and. flatness. The word "smooth", however, does not mean that the surface must be gleaming and all in one. There may be slots or small bores in the surface, but neighboring surfaces must be machined in one move to ensure the accuracy of the surfaces and also to reduce the cost of their machining.

In another embodiment, the roller chains in the longitudinal section may border directly on one another across the web. . This ensures the independent free flow. The roller chains may be formed with one or more rows of chain chains located on both sides of the roller.

For example, Gallic chains are used that are simple and economical and that are available on the market in many standard dimensions. In this kind of chains, there is a distance between the neighboring rollers across the web which corresponds to the width of the groove and on which the molding belt is not supported on the rollers. This is also the case for multiple chains of this kind at the sites of the inner strings. These distances form areas without supporting longitudinal support. At not too high pressures, these inevitable free spans in the form belts do not lead to any disadvantages. For certain materials, e.g. resin laminates or the like, however, it is a matter of a most uniform application of high pressure. In addition, the rollers of the present arrangement not only transmit the pressure, but also the temperature from the heated support structure to the mold belts and thus to the curing mass compressed between the belts. The normal chains necessarily provide a strip-like pressure and heat transfer, which for certain resin laminates do not produce proper products. Therefore, from the arrangement according to the invention, the apparatus must be designed in such a way that the high pressure and the temperature are transmitted as uniformly as possible to the mold belts and the mass between them.

This is achieved according to the invention in that lateral constraints for successive rollers in a successive roller in a roller chain are set transversely of the flow direction relative to each other. This means that in the transverse direction there are no places of the web that are constantly free of the rollers. On the contrary, a gap between two laterally adjacent rollers is constantly overridden by the subsequent rollers, which are laterally sided with the preceding roll and project into the gap. However, it is not necessary that the immediately following roll covers the entire gap. This can be done using multiple rollers and multiple incremental offsets. In any case, however, at some point in time the gap must be completely overlapped, so that here again a constant repetition of the pressure exertion from one overhead roller and a heat release from it occurs, and that nowhere the molding belt remains unoccupied. 35 stirred.

By a roller roller press with lugs connecting in the direction of successive rollers, which are parallel to the end faces of the rollers, the lugs connecting two successive rolls may be curved laterally between the rollers. The creasing occurs in the rolling plane. In this embodiment, it is advantageous that relatively large lateral supports 5 of successive rolls can be obtained.

The crank portion of the lasers, which must be positioned between successive rollers, does not allow the rollers to move directly up to one another and this crank portion increases the supporting distances.

According to yet another embodiment of the invention, in which the press uses roller chains with straight joints connecting successive rollers in the flow direction and which are parallel to the end faces of the rollers, several successive loops connecting two adjacent rollers can be used. be positioned offset relative to the prior groove associated with the same side of the web.

Thus, as in the normal roller chains, the lugs do not form a strand which is parallel to the web in the longitudinal direction, but within a single chain obliquely arranged by the overall repetitive operation, so that the chain as a whole runs straight.

This can be done, for example. is carried out by the fact that the lasers for a single roller chain string are constantly placed aligned to the same side, and that on the side of the roller chain string from which the chains of chains at the time of removal, a new chain of chains begins after several successive rolls at the edge of the roller chain, while the chain of chains closest to the edge of the other side after a corresponding consecutive number of rolls ceases. Such a chain comprises several mutually parallel but oblique to the total length of the chain chains. Between these chain chains, within a single chain or single strand 35 are placed several rollers separated by the chain chains. The chain chains migrate obliquely over the rolling surface comprised by the single strand due to the continuous motion, which, conversely, means continuous displacement inclined over the single strand rolling surface.

Since the single chain or single strand has only a specific but freely selectable width for the purpose of use outside the particular press, the chain of links on one side approaches from the edge to the edge more and more, while on the other, the edge towards the inner side of the single strand remove themselves. After a certain number of joints, the chain that first reaches the edge is disconnected and at the other edge a new chain of chains begins. For further explanation, see the embodiment. Such a chain covers the total pressure surface in a uniform manner.

According to a further embodiment, the direction of movement of the chains of a chain of chains can be reversed alternately after several successive rolls, so that the chain of chains within a single strand or single roller chain runs in zigzag. This avoids interruption or commencement of the chain string. The overlay of the track is not completely uniform because areas that are constantly overruled are adjacent to areas that are only overruled at regular distances.

Preferably, a single strand comprises two chain chains whose chains are opposite to each other.

According to yet another embodiment, the outer rollers may have different lengths so that the outer bounding surfaces of a side of a single strand lie in the same plane. In this way, despite the fact that there are no longitudinal extension chains, it is ensured that a parallel limitation of the roller chains is maintained.

The outer rollers may be mounted flying and the ends of the roll pins on the outer rollers may be recessed into their end faces, whereby the rollers in neighboring roller chains, i.e. their bearing areas, adjacent to each other immediately, so that these areas intersect without intersection across the path. Thus, on the outer limits of the single strings, there are no 35 loops which condition free span of the mold belts.

Within the single strings, the effect of the previous chain chains has been overcome due to their sloping guidance. The independent flow of neighboring roller chains is thus ensured while the entire pressure surface is overruled.

In order to exclude any mutual influence between the roller chains, there may be 5 flat bands lying in the direction of flow and perpendicular to the roller plane, which cause a complete separation between them, so as to exclude the transfer of different longitudinal movements between neighboring roller chains due to each other. of friction 10 or clinging to protruding edges.

In one embodiment, the straps may be fixed longitudinally fixed with respect to the supporting structure. The roller chains move on both sides along each belt.

The strips thus formed have no connection with the plates and can move across the web. Their width is dimensioned so that they can fit between the plates and the molding belts, but at least cover the area in which protrusions of 20 adjacent roller chains can be found, which cause these chains to stick together . The belts need only be retained at their ends where they protrude from the part of the support structure which transmits the working pressure. In some circumstances, even retention at the rear end relative to the direction of movement of the roller chains is sufficient, because the bands due to the movement of the neighboring roller chains are pulled straight and held in their position.

To provide lateral guide to the roller chain arrangement, at least one of the longitudinal strips may be inserted into a longitudinal groove in the plate and protrude from this groove between the roller chains. The notes required for the tapes are only narrow and do not require any particular dimensional accuracy in depth, unlike the track-serving notes 35 of United States Patent 3,120,862.

Since the bands are relatively thin and the machining difficulty grows when cutting very narrow notes, an additional band may be inserted in addition to the longitudinal part of the band. The groove width then corresponds to the sum of the thicknesses of the ribbon and the extra ribbon, so that despite the thin ribbon it is possible to have a width of the groove which can be easily made. The tape can be wedged and retained in the groove by the auxiliary tape.

The straps inserted in the plates need not be placed between each pair of roller chains. A convenient embodiment is that strips embedded in the 10 plates follow one another across the web at distances of several roller chains. Thus, between inlaid belts, several roller chains run either immediately upstream of these or during insertion of belts which are not inserted into the plates, but which are freely tensioned longitudinally between plate 15 and molding belt.

The straps should not exert greater forces, but only prevent edges or projections on neighboring roller chains from interfering with one another. Consequently, the bands need not be particularly stable.

20 Once the roller chains have passed through the pressure zone, they must again be led back to the inlet. The return can be effected by placing a pressure transfer plate between the supporting structure and the associated molding belt which, on the side facing away from the molding belt, has nuts placed in the flow direction and of a depth greater than the diameter of the rollers. , and a width corresponding to the width of the roller chains into which notes the reciprocal parts of the roller chains are placed. The chains run through the notes back to the inlet, and because of the greater depth of the notes, they are not exposed to stress and run unloaded in the notes.

The distance of the notes across the track corresponds to the distance between the roller chains. It is equal to the distance between the ribs lying between the grooves and 35 which must transfer the total load and therefore cannot be made arbitrarily narrow, as would be desirable for a small distance between the single strands or the individual roller chains.

14 U4207

In order to be able to move the notes closer together in the transverse direction without compromising the supporting cross-section of the fields remaining between the notes, the plate preferably has a greater thickness than the double roll diameter and alternately in the transverse direction a groove which is of a depth greater than the roller diameter, on the side facing away from the molding belt, and a groove of greater depth than the rolling diameter, on the side facing the molding belt.

10 When the adjacent lateral boundary surfaces of the neighboring notes are in one plane, these notes can take up chains whose lateral boundary surfaces extend without mutual space.

In order to guide the rollers from the underside forming the supporting surface of the support structure to the upper surface of the structure, turning means may be arranged on the ends of the plate which guide the rollers from the side of the plate facing the respective molding belt to the other side and vice versa. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of an apparatus according to the invention; FIG. 2 is a vertical longitudinal section through the apparatus of FIG. 1, FIG. 3 is a cross-section through the apparatus of FIG. 1 and on a slightly supported scale; FIG. 4 is a cross-section through the embodiment of FIG. 3 with a dotted frame, the edge region of a plate 30, which transmits the pressure and on which the roller chain runs, shows; 5 is a cross-sectional view similar to FIG. 4 through another embodiment; 6 is a longitudinal section through the initial area of the plate of FIG. 5, 35 FIG. 7 is a cross-sectional view similar to FIG. 4 through yet another embodiment of the invention; 8 is a longitudinal section similar to FIG. 6 through the embodiment of FIG. 7, and Figs. 9-11 embodiments of roller chains particularly suited to the apparatus of the invention.

In FIG. 1 shows a press for the manufacture of wood chipboard laminates, mineral bonded building boards, 5 for sintering webs of polytetrafluoroethylene, etc.

It comprises an upper molding belt 1 of steel plate of approx.

1-1.5 mm thickness and a corresponding lower molding belt 2.

Between the mold belts 1 and 2, in longitudinal section 3, a web 4 of the aforementioned material 10, which comes from a material filling 4 ', is compressed.

The upper molding belt 1 runs about rollers or drums 5 and 6 which are arranged transversely of the web 4, of which the drum 6 is mounted in a fixed frame 7 and the drum 5 in a frame 9 which can tilt 15 about an axis. located across the track 4 and is mounted in a bearing bracket 8 on the floor. The frame 9 can be moved by means of a hydraulic cylinder 10 and in this way clamp the molding belt 1.

Similarly, the molding belt 2 runs across drums 20 11 and 12 arranged transversely of the web, of which the drum 11 is mounted in a fixed frame 13 and the drum 12 in a rails movable frame 14.

The support 14 can be displaced by a hydraulic cylinder 15 in the longitudinal direction of the web, and the molding belt 2 can be tensioned in this way. The mold belts are driven via the drums.

The mold belts 1 and 2 run through the apparatus in the direction indicated by the arrows 16, so that at the right-hand side of FIG. 1 and filling by means of a filling 4 'not shown shown, 30 is drawn into the longitudinal region 3. The outgoing compressed web 4 is removed at the left end of the molding belt 2 by means of a suitable unit not shown.

In the longitudinal section 3, an upper support structure 17 is arranged within the molding belt 1, which acts 35 together with a lower support structure 18 arranged within the lower molding belt 2, supporting the sides of the molding belts 1 and 2 facing the web 4 and pressing it plan with great force.

16 144207

The support structure 17, 18 consists of individual supports 19, 20 which are superimposed and arranged respectively above and below the mold belts 1 and 2 and the web 4, as seen in FIG. 2. Each carrier pair 19, 20 5 is clamped together in the sides outside the web, so as to have a few force-closed pressure elements in themselves. As shown in FIG. 1 and 3 are effected by strong spindles 21 acting between brackets 22 and 23 connected to end plates 10 24 and 25 of the supports 19 and 20. The spindles 21 may be adjustable by means of a motor not shown.

Instead, the compressive force can also be exerted via a hydraulic cylinder. The lower supports 20 transmit their force via pressure pads 56 which are filled with a hydraulic medium and which exert a uniform pressure over the width of the web, even if the supports 19, 20 are bent under pressure. There may be a compression pad for each carrier pair 19, 20 or more consecutive carriers in common. Between the supports 19 and the pressure pads 20 and the mold belts 1,2 respectively, there are thick plates 26 and 27 which transmit the force exerted by the individual pressure elements 19, 20 evenly and uniformly to the mold belts 1 and 2 and which have channels in which heating elements are arranged or through which a heating medium can be passed.

Between the facing sides of the plates 26, 27 and the mold belts 1, 2 are placed roller chains, on which the mold belts 1 and 2 roll relative to the plates 26, 27, and which circulate endlessly in a vertical longitudinal plane about the plates 26, 27. The roller chains are further described with reference to FIG. 4-8. The rollers of the roller chains transfer both the pressure and the heat from the plates 26, 27 to the mold grooves 1, 2 and thus to the web 4.

The roller chains, when they have reached the end of the longitudinal section, can be returned to the actual pressure range, ie. between the supports 19, 20 and the plates 26, 27, as indicated in FIG. 2 at the plate 26. However, there is also the possibility of passing the roller chains around the support structure as shown by the supporting structure 18 in FIG. 2 below. Along the longitudinal region 3, several individual plates, similar to the plates 26 and 27, may also be arranged one after the other.

For example, it may be convenient to separate the plate 26 'forming the inclined inlet region 57 by 28 from the one shown in FIG. 2 to the left plate portion 26, and to use two sets of roller chains running separately about plate 26 and plate 26 '.

10 In FIG. 4, a first embodiment is illustrated with respect to the plates 26, 27 and the associated roller chain arrangement. For this embodiment, a plate 30 is used which has a smooth underside 32. The surface 32 is not interrupted by ribs or the like and may be made at one time by planing or grinding.

The surface 32 forms a common running surface for the adjacent roller chains 33. The roller chains 33 consist of a pair of successively parallel rollers 34, which are connected to each other by means of roller pins 36 and lugs 35, which are located on both sides of the rollers. in the rolling direction and perpendicular to the rolling plane. The roller pins 36 form both shafts for the rollers 34 and joint pins for the lugs 35.

The roller chains 33 individually constitute a single-strand 58. The neighboring strings 58 can run independently of each other, which is why, in the exemplary embodiment, the outer surface of the lugs 35 is smooth and the head of the roller pins 36 is recessed. The total roller chain system thus constitutes a rolling surface which does not lead to an oblique gradient 30 of the individual rollers 34.

The rollers 34 in this embodiment have a diameter of approx. 12.7 mm and such a width that a 2-2.5 m wide track must use 50-100 adjacent roller chains.

35 Through the plate 30 there are heating ducts 40 which are connected at the ends to sealed supply lines 41 and which supply to the plate 30 the heat needed for the mass forming the web 4.

18 14Λ207

To avoid heat loss, there can be between the upper side, ie. the side of the plate 30 and the sides of the supports 19 and 20 facing the support structures 17 and 18 are provided with a heat insulating intermediate plate 42.

5 The embodiment of FIG. 5 and 6 differ from that of FIG. 8, by means of which strip 100 is arranged between the individual roller chains 33, which in this embodiment consists of a steel strip of approx. 1 mm thick and having a width slightly smaller than the diameter of the rollers 34. The belts 100 are perpendicular to each pair of roller chains 33 along the entire longitudinal section 3. The belts 100 are retained for the ends of the ones shown in FIG. 6 schematically illustrated clamping assemblies 101 located outside the plate 30. It is not necessary to tighten the straps 15 100 very strongly. It is only to be prevented that the boats are not included in the revolving roller chains 33.

Incidentally, the straps 100 are closed between the smooth underside 32 of the plate 30 and the molding belt 1.

The bands .100 serve to separate neighboring roller chains 33 from one another and prevent rivet heads 39 or edges of the lugs 35 from clamping together.

In FIG. 6 shows the design of the plate 30 for the end. Form pieces 37 are arranged which guide the roller chains 33 away from the surface 32, so that they can be passed over the support structure to the other end of the plate 30, whereby the roller chains 33 run closed about the plate 30 and the support structure. . The mold pieces 37 are wedged to the ends of the plate 30 by means of fathers 30 38.

In FIG. Figures 7 and 8 show another embodiment of the arrangement of plate 26, 27 with the roller chains.

Here, plate 26, 27 is formed by a heating and support plate 43 and a separate return plate 44 therefrom.

The plate 43 here also has heating ducts, which at the ends are connected to each other via pipe bends 45 to a closed conduit.

Between the underside of the plate 43 and the shape belt 1 runs roller chains 60, which have rollers 34 on both sides of a chain of chains 35, in which the ends of the roller pins 36 are recessed. By the lateral restriction of the plate 43, 5 guide strips 46 are provided for the total system of roller chains 60. Here, too, roller chains 60 are single strings 58, which can run independently of one another.

Between the roller chains 60 there is again strip 100 which separates the roller chains 60 from each other 10 and prevents the rollers from engaging with their edges. In the embodiment of FIG. 7 illustrates three strips 100 which are freely disposed between the underside of the plate 43 and the molding belt 1.

The left-hand side of FIG. However, the fourth strip 100 '15 is inserted into a longitudinal groove 102 in the plate 43 and forms a lateral guide which is fixed relative to the plate 43, while the free strip 100 can be displaced laterally with respect to the plate 43.

The groove 102 is milled or cut in the longitudinal direction of the plate 43. The note may have a width corresponding to the band 100 '. and can immediately record the tape 100 'without charge. To get a note; which can be more readily manufactured, the groove 102 in the illustrated embodiment is made somewhat wider and an additional belt 103 is wedged into the groove 102 adjacent to the belt 100 '. This band 103 fills the wider groove while retaining the band 100 'in the groove 102.

In FIG. 8 is shown the inlet to the longitudinal section 3. The roller chains 60 move in the direction of arrow 104.

30 in this direction of movement, it is sufficient to place only a clamping device for the one shown in FIG. 8 at the left end of the plate 43, there is no need to use any clamping assembly 101 because the roller chains 60 include the belts 35 100 sufficiently and because the belts 100 are otherwise retained between the underside of the plate 43 and the molding belt 1. the upper side.

While returning the roller chains 33 to the exemplary embodiment of FIG. 5 and 6 happened around the support structure 17, 18, this reversal occurs in the embodiment of FIG. 7 and 8 through special return plates 44 disposed between the support structure 17, 18 and the plates 43. The return plates 44 are more than twice the diameter of the rollers 60 of the roller chains 60. The return plate 44 has, on the side facing the supports 19 and 20, return notes 47, and on the side facing the top 10 431 s, return notes 48. The notes 47 and 48 are offset relative to each other across the path 4 so that the lateral boundary faces 49, 50 are substantially vertical to one another. In this way, the corresponding restraining surfaces for adjacent roller chains are also constantly in one plane, i.e. only one piece relative to each other corresponding to the width of the bands 100,100 '. The force from the working pressure is transmitted through the intermediate region 51, which results from the thickness of the plate 44 being greater than the double rolling diameter.

Also provided at the ends of this plate are shape pieces 52 which redirect the roller chains 60 from the underside of the plates to the upper side and vice versa. The shape pieces 52 have, for neighboring roll chains 60, different radius of redirection, so that the roll chains 60 can enter the different notes 47, 48 of the plate 44.

In the embodiment of FIG. 7 and 8, a small pneumatic 30 overpressure roll is maintained around the rollers 60 of the roller chains 60 to prevent dust or the like from entering this area. For this purpose, there is between the support structure, ie. The carrier 19 and the molding belt 1 are provided with a cover 53 which is tightly connected to the supporting structure and which is sealed to the leading molding belt 1 by means of gaskets 54. The closed space thus obtained is supplied with compressed air via a compressed air supply 55. using the gaskets 54 need not be hermetic. It is sufficient if a small overpressure can be maintained.

It is essential in the above embodiments that each pair of neighboring roller chains 33 or 60 can move forward independently of one another. The overall system of support members forms a region which is divided into longitudinally extending single strands 58 which, if appropriately actuated, can be displaced relative to each other longitudinally. Thus, different forces cannot be generated by means of the mold belts 10 forcing forces within the roller chain system.

There are use cases where a particularly high pressure must be exerted completely uniformly and where the temperature differences must be kept as small as possible.

In these cases, a chain arrangement according to FIG. 4 15 and 5 do not lead to sufficiently good results.

To remedy this, other chain systems have been developed whereby distances or areas which will never be affected by the rollers cannot be kept between the rollers. Such a chain 70 is shown in FIG. 9. The chain 20 comprises curved latches 71 and has variously long rollers 72 and 73 which, corresponding to the crease, are arranged alternately in such a way that the outermost parallel limiting faces 74 and 75 are parallel to one another. The spaces 76 between the rollers 25 which receive the lasers are set laterally relative to each other by the pre-curvature of the lasers 71. The gap 76 between those of FIG. 9, the upper rollers 72 and 73 are overturned as the chain 70 moves upwards by the next roll 72. Since neighboring chains 70 can bump 30 adjacent to each other due to the parallel restraining surfaces 74 and 75, the entire pressure surfaces of the mold belts 1 and 2 can be treated with a chain system of this kind.

Another embodiment is shown in FIG. 10 35 in the form of a chain 80 having straight grooves 81. These grooves, however, are not arranged in a series of successive consecutive runs parallel to the flow direction, but continued successively to the same side. Thus, e.g. the lug 81a in FIG. 10 is raised upward relative to the latch 81. The latch 81b is lined upwardly relative to the latch 81a. However, the latch 81c is again lowered downwardly relative to the latch 81b, and then a further four downwardly latched latches arrive until the latch 81d, from which a resurgence occurs. Thus, the common string of loops 81, 81a, etc. runs in zigzag within the chain 80 so that the space left after one or the other rolls is overruled by some subsequent roll.

The string of badges 81 is associated with a stray string 82, the strands of which are opposed to the strands of the strands 81 relative to the longitudinal median plane of the chain 80. Thus, each part of the chain 80 consists of three 15 rolls which change periodically in their width and complement each other into a single string with parallel restraining surfaces 83, 84. A joint's three rollers are held together by a bolt 85, the head 86 of which is placed in a recess 87 and therefore does not extend beyond the restriction surface 83 or 84.

The chain 80 corresponds to the chain shown in FIG. 6 and 7. Neighboring chains 80 abut each other with their end faces 83 and 84 so that there are no spaces at these locations without pressure. The distances 25 between the individual rollers in a chain link are periodically overruled by subsequent chain rollers to achieve a uniform influence on the printing surface or the mold belt 1, 2.

In FIG. 11 is shown another embodiment of a chain which avoids the disadvantages of unaffected stripes. The chain 90 is constructed in the same way as the chain 80 only with the difference that the latches 91a, 91b, 91c are constantly aligned to the same side relative to the previous latch. The loading strands thus extend obliquely through the parallel restricted chain 90. The parallel elasticity of the side surfaces 97 and 99 is obtained by means of a suitable step-down of the lengths of the individual rollers. After a certain number of rollers, the top welding string 91 has come near the edge * so that the roll

Claims (15)

A press for exerting a surface pressure on a longitudinal section of a continuous web, in particular for continuous production of sheet material to be formed under pressure and any heat, in which the press web is guided between endless mold belts running in the direction of flow of the web. and extending over the width of the web, and in which press between rotating belts 35 and plates disposed above and below the belts of a support structure are rotating rollers which circulate in UA207 an endless following in a longitudinal plane perpendicular to the web and which transmit the working pressure from the support structure for the molding belts, characterized in that the rollers in the longitudinal section (3) are arranged in many transverse spacers (33, 60, 70) arranged in close proximity to each other across the web (4), but independently of one another in the direction of conveyance of the web. 80, 90), each consisting of at least one chain of chains with plate-shaped links connected by transverse shaft pins on which the rollers are pivotally mounted. Press according to claim 1, characterized in that the plates (30, 43) are smooth on the side against which the rollers abut. Press according to claim 1 or 2, characterized in that the roller chains (33, 60, 70, 80, 90) in the longitudinal section (3) immediately adjacent to each other across the web (4). Press according to any one of claims 1-3, characterized in that lateral restrictions for successive rollers in a successive roll in a roller chain (70, 80, 90) are set across the flow direction relative to each other. Press according to claim 4 with roller chains with grooves which connect successive rollers in the direction of flow and which sit parallel to the end faces of the rollers, characterized in that the grooves (71) which connect two successive rollers (72) , 73), is curved laterally between the rollers (72.73). Press according to claim 1, with straight chains of 30 loops connecting successive rollers in the flow direction, and sitting parallel to the end faces of the rollers, characterized in that several successive loops each connecting two adjacent rollers are arranged in relative to the prior link associated with these 35 to the same side of the web. Press according to claim 6, characterized in that the lugs (91a, 91b, 91c) of a roller chain (90) are constantly positioned perpendicular to the same side and that UA207 on the side of the roller chain from which the chains of chains at the removal is removed say, a new chain of chains (98) begins after several successive rolls at the edge of the roller chain, while the chain of chains (91) which is closest to the edge on the other side terminates after a corresponding number of successive rolls. Press according to Claim 6, characterized in that the direction of travel of a chain of chains (81) is alternately reversed after several successive rolls, so that the chain of chains (81) within a roller chain runs in a zigzag. Press according to claim 8, characterized in that it comprises two chains of chains (81, 82), the latter of which are set opposite each other. 15 10. A press according to any one of claims 4 to 9, characterized in that the outer rollers have different lengths so that the outer limiting surfaces (74, 75 and 83, 84 and 97, 99) of a side of a roller chain are in the same level. Press according to any one of claims 4-10, characterized in that the outer rollers are mounted in flight. Press according to claim 11, characterized in that the ends (86) of the roll pins 25 (85) of the outer rollers are recessed in the end surface of the rollers. Press according to any one of claims 1-12, characterized in that between the roller chains (33.60) there are flat bands (100,100 ') which lie in the flow direction and are perpendicular to the roller plane. Press according to claim 13, characterized in that the bands (100,100 ') are fixedly fixed to the supporting structure (17, 18). Press according to claim 13 or 14, characterized in that at least one (100 ') of the strips of a longitudinal edge is inserted into a longitudinal groove (102) in the plate (43) and protrudes from this groove (102) between the roller chains (60).