DE2304365A1 - MACHINE FOR MANUFACTURING A NON-WOVEN NETWARE - Google Patents

Description

Patent attorney Dipl.-Phys. Rudolf Peerboom »_

56 Wuppertal - Barmen 4 0 U H 0 0 Q

Frledrich-Engeli-Allee 549/351 Tel. 556147

Patent and use application application

ERIK S0LBECK, Vedbsek, Denmark

Machine for the production of a non-woven netting '

The invention relates to a machine for producing a non-woven netting consisting of crossing warp threads and transverse threads that are connected to one another at their crossing points. The machine has a stationary support for a circular cylindrical or mainly circular cylindrical layer of warp threads, at least one rotating thread layer for laying a transverse thread in a helical shape around the warp thread layer, means for cutting open the tubular fabric formed in this way to at least two nets and smocks, which each net on its way from the Align or spread the cutting point on a rotatable roller in a flat shape, over which roller the aligned, flat net.

Such machines are among others from the'US-PS 2 79? 72Ö issued July 2, 1957 in the name of G. Slayter et al, and US Patent No. 3 3œ4 521, issued May 21 i ^r ai 1968 in the name of GV / .B. Borup, became famous. Depending on the processed

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Threads, the thread density, the speed of the thread layer and the feed speed of the warp threads can carry goods with far different properties are produced, for example reinforcement nets made of relatively coarse plastic or Glass fiber yarns for e.g. paper or plastic film web. nen or in the extreme opposite case fine-meshed, gauze-like Textiles. The connection between warp and transverse threads can be established in various ways, ■ e.g. with the help of an adhesive applied to one or the other thread system or simply by heating of the threads, if they consist of a thermoplastic or are coated with such.

In all cases the machine works at high production speed, and especially for maintenance a uniform tension of the transverse thread or threads it is important that the tubular fabric formed by laying is at least approximately has a circular cross-section. On the other hand, this cross-sectional shape leads with the known machines that the reshaping of the individual net webs in a flat state - so that they can be reeled up - requires "that the network still has a relatively long way to travel from the cutting point, and this gives the machine, which normally stands upright, a correspondingly large height, which in practice is the maximum width in which the network in question can be established.

The invention aims, inter alia, to remedy this deficiency, and the machine according to the invention is characterized in that that the means used to align each net are one

include stationary guide that is on the of the web for the • The side facing the cylindrical tubular fabric has a curved leading edge, the end points of which are in the direction of the associated Aufschneidorganen located zone and which are symmetrical from the end points to the outside of the

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The connecting line between the cutting organs and in the feed direction of the tubular fabric extends forward, see above that its center is furthest from the said line, and that the axis of the rotating roller is behind the foremost point of the leading edge.

The construction ßev known machines is undoubtedly based on the opinion that it is a condition for the production of a network with at least essentially rectangular mesh, ie with relatively little distortion or deformation of the network during the transformation of the same from a partially cylindrical to a plane path, that the net continues to move in the same direction as in its manufacture and is gradually stretched in its width direction, while at the same time the middle part of the net is pulled against the tube axis. The present invention is based on the new and surprising finding that it is possible to achieve the same effect by guiding the net on its way from the cutting point to the winding roller via means which simultaneously spread the net gradually into a planar structure and which, during this alignment, guide the network in its entirety along a path which extends outwards with respect to the axis of the cylindrical support and which therefore makes it possible to make the dimensions of the machine in the axial direction much shorter than in the known machines to keep. It has proven possible to build a vertical machine whose height does not exceed half the peripheral length of the tubular fabric that has not been cut open, ie less than half the height required for the machines built according to the principles previously used. In practice, this means that you can set up a machine in a room with a given height to the ceiling that can produce nets twice as wide as before.

The new design of the alignment means makes it possible to

not only ensure that the individual warp thread is between the cutting point and the said roller, where the The net is spread out in a flat shape, follow all equally long tracks so that the flat net has rectangular meshes, but also that the rectangular mesh shape during the alignment process in which the. different zones of the Width extension * "of the network are consecutively deflected over the leading edge, is maintained. This means that the forces exerted on the individual threads and on the adhesive connections at the crossing points are relative remain small because the warp threads are not essential on their way Show a tendency to shift sideways and thereby the connecting transverse threads by tensile forces claim. You can therefore reduce the amount of glue used to join the threads, and you can with the Begin unfolding or spreading out the net very shortly after the work area of the thread guide, i.e. to a point in time at which the bonded joints may not have reached their full strength. This also contributes helps to reduce the dimensions of the machine in the feed direction of the tubular fabric, i.e. in the case of the above vertically oriented machine mentioned the machine height.

The leading edge can be in or substantially in the cylindrical Run the path of movement of the tubular fabric, and the axis of the rotatable roller can be behind the line between the End points of the leading edge. These two details help to reduce the space required by the machine, both in the axial direction and at right angles to it.

The leading edge can be formed by a curved bracket between its ends by means of at least two struts of adjustable length with respect to the frame the machine is supported. This will reduce the friction that the mesh is subjected to during alignment as it moves freely both in front of and behind the bracket, but it is within the scope of the invention to have a guide

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with greater expansion in the direction of movement of the network which can be made of sheet metal, for example. With such a more continuous leadership, a corresponding Achieve a more uniform course of the changes in direction of the individual threads.

Between the bracket and the roller there can be two stationary guide rails that are symmetrical from two points between go out of the ends of the bracket and extend outwards towards the ends of the roller. By pasting this Guide rails can change the direction of the warp threads in the edge zones of the network less suddenly and therefore less be claimed and made.

It has proven to be useful to connect the guardrails to the To connect brackets in two points, their projection on the axis of the rotatable roller each about a third of the roller length from one end of the roller. The two outer thirds of the width of the network are thereby over both the bracket and the guardrails are guided, while the middle third extends only over the middle part of the Handle moved away.

Analogously with the above-mentioned support of the bracket by struts with adjustable length, which is also preferred in the same places as the guide rails are connected to the bracket, it is useful to use the guide rails with Using struts of adjustable length with respect to the frame of the machine to support, creating a certain Fine adjustment of the path lengths of the warp threads is made possible.

The invention is explained in part below with reference to FIG schematic drawing explained in more detail. It shows

1 shows a side view of an embodiment of the inventive Machine, and

FIG. 2 is a view, partly in section, of the left end face of the machine in FIG. 1.

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In both figures of the drawing are for clarity half parts of the machine and the network produced are omitted.

The machine illustrated on the drawing has a ♦ Stell, which comprises two heavy, essentially mirror-symmetrical, box-shaped front parts 1 and 2, which extend through in the longitudinal direction running box girders 3. are connected to one another at the foot of the machine. Four protruding from the forehead parts 1 and 2, inclined struts 4 are connected to one another at the top by two box girders 5 running in the longitudinal direction, which in turn are connected to one another by horizontal cross members 6. In the middle of the machine are four vertical ones Supports 7 suspended from the cross members 5, and the supports, which are additionally stiffened with one another in a suitable manner are, carry the means described below to support the warp threads for a net that comes with the machine will be produced.

Said support means comprise an annular heating element O, which is attached to a heavy disk 9 which is rigidly connected to the supports 7. As shown, the heating element O can be a hollow sheet metal construction be, the interior of which is filled with a suitable insulation material 10. There are radiators on the inside of the ring Ö 11 attached, a cooling ring 12 is arranged above the ring Ö, the surface of which, as shown, can be provided with recesses, behind which motor-driven fans 13 are attached, blow the cooling air out through the openings. The openings can, as shown on the left in Fig. 1, be covered by filter nets, over the ring 12 is still an additional cooling ring 14 is arranged, which is hollow, and through which for the purpose of additional cooling of the manufactured Network a cooled liquid can be passed. The rings 12 and 14 are on in a manner not shown the supports 7 attached.

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Two concentric rings 15 and 16 are suspended from the underside of the disc 9, and the rings, which can be made of round rod material, are provided with radially aligned recesses which serve as guides for the above-mentioned warp threads designated 17. The warp threads are supplied from non-stationary coils shown or similar inventories, & lt outside the machine, that is, in Fig. 1 on the left side, are arranged, and each yarn is fed through a flexible tube Eat, which may be made of transparent plastic. As indicated in FIGS. 1 and 2, the tubes 1 3 can expediently be held together with the aid of tensioning straps 19 and 20, of which the former enclose all the pipes, while the straps 20 open the pipes in smaller, the desired uniform distribution of the warp threads 17 surround the periphery of the guide rings 16 and 15 adapted groups.

Two transverse or weft threads 21 and 22 are each fed from a stationary thread supply through guide tubes 23 and 24, respectively. the with the help of rotary couplings 25 to a rotating, in the center line of the rings 8, 12 and 14 mounted hollow shaft 26. Are connected. A belt pulley 27 is attached to the shaft 26, with the aid of which the shaft is connected via a belt from a motor 2β shown schematically in Fig. 2, e.g. hydraulic motor fed by a pump (not shown) in the frame of the machine. At the Rotating shaft 26 is attached to a double thread layer, which comprises two hollow arms 29, which are diametrically opposed to one side protrude and at their ends with eyelets or corresponding guide means for winding the two transverse threads 21 and 22 in Helical shape around the warp threads advanced along the ring Ö in the upward direction. This will a network is formed in a known manner, the mesh of which depends on the ratio between the feed rate of the warp threads 17 and the peripheral speed of the thread layers driven by the shaft 26 are rectangular with a good approximation

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The warp and transverse threads are connected to each other ± n their cross points in a manner which is also known per se, for example in that each warp thread is coated with a heat-activated adhesive before it enters the associated guide tube 10 the heat given off by the ring to the threads melts and is then solidified again by the cooling brought about by the rings 12 and 14.

When using threads made of thermoplastic material or coated with such a material, the connection of the threads could alternatively take place solely by heating the threads as they pass the ring ß, which, moreover, can also be heated in any other suitable way, i.e. possibly also with direct burners.

The network formed in this way, which after passing run on the cooling ring 14 is still in the form of a hose or sock, is thereupon at two diametrically opposite points with the help of electrically heated cutting wires 30 cut through, which protrude through the net between two adjacent warp threads and therefore the transverse threads in the ' Cut through in sync with the advance of the net. The cutting wires 30 are mounted on two brackets 31 with With the help of struts 32 are attached to a disk 33, .which in turn of the horizontal supports 34 between the Supports 7 is supported.

On each disc 33, two bow-shaped aligning members 35 are also attached, which are expediently made from tubes can be and extend obliquely upwards from their attachment points and approximately follow a cylindrical surface, which is coaxial with rings O, 12 and 14 and the same Diameter like the rings. As best from Fig. 1

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can be seen, each bracket 35 is relatively weakly curved in its middle section 35a, while the two end sections 35h a greater curvature, d-.h. smaller ones. Radii of curvature, exhibit. The brackets 35 are, except, as already mentioned, to be attached with their ends to the discs 33, with With the help of two inclined struts 36, at the bottom of the forehead parts 1 and 2 of the frame are supported approximately at the transitions between the sections 35a and 35b. The length of the struts 36 is adjustable, namely are on both ends of adjustable anchors 37 of the turnbuckle type, i.e. with right-hand and left-hand threads, attached. One in one obtuse angle curved guardrail 3 #, which like the bracket 35 and the struts 36 can be made from a tube is at its lower end by means of an adjusting mechanism 37 attached to each inclined strut 36, and with its upper end each guide rail 33 connects to the bracket 35, namely in the vicinity of the point at which the strut 36 is also connected to the bracket. The rail 30 is, however not attached to the bracket, but to the strut 36 with the aid of a bracket 39 attached to this and a pivot pin connected by a fork attached to the rail 33 40 goes. Each rail is also provided with the aid of a rod 41 with adjustable length, i.e. with right-hand and left-hand thread analogous to the adjustment mechanisms 37> in relation to the loading. corresponding end part 1 or 2 of the frame of the machine is supported.

Two rotatable spreader rollers 42 with curved axes are mounted on the two frame parts 1 and 2, namely so that they lie outside the bracket 35 and their imaginary axis, i.e. the straight connecting line between the end points of each roller, runs parallel to the line between the two places where the mesh tube with the help of the Cutting wires 30 is cut. Each roller covers up known V / eise an outer, tubular sleeve 51 made of rubber or similar material, which is not shown with the help of and

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is rotatably mounted on a continuous shaft 52 at suitable distances from one another over the length of the roller distributed rolling bearings. At each end, the shaft 52 is connected with the aid of universal joints 53 to a shaft journal 54 which is held in a bearing block ^ 5 when the machine is in operation. The sleeve 51 can thus dope on the stationary curved shaft 52, the orientation of which can be adjusted with respect to the vertical axis of the machine by rotating the shaft journals 54 in the bearing blocks 55 with the aid of adjusting means not shown. The bearing blocks can also be individually displaceable on the end parts 1 and 2, specifically towards and away from the vertical axis, ie to the right or to the left in FIG. 2. Due to their curvature, the rollers counteract any tendency to wrinkle the nets, and the aforementioned adjustments of the C-orientation of the roller axis also enable fine adjustment of the track lengths for the individual, analogous to the adjustment already described with the aid of the support rods 41 of the guide rails 33 Warp threads.

Under each roller 42, two rollers 43 and 44 are mounted in the two end parts 1 and 2, which normally oppose one another are loaded and are driven together with opposite directions of rotation, so that they are the network between to prefer. The network also runs from the roller 44 over two guide rollers 45 before it is wound up by a driven winding roller 46. The two rollers 43 and 44 are normally driven at a constant speed equal to the speed of rotation of shaft 26 in such a relationship is that the network receives the desired mesh size, while the V / aIze 46 z; vertically from a motor can be driven regardless of the changes the diameter of the wound on the roller 46 Netzbahn generates a constant torque.

From the above explanations it can be seen that

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two net webs are produced by the machine in operation, which are successively reshaped from their original semi-cylindrical cross-sectional shape into a flat state, before each net web in the. Passage gap between the rollers 43 and 44 runs in. This alignment takes place in that each net is first pulled upwards and outwards over the associated bracket 35 and then over the roller 1 + 2 , but the outer parts of the width of the net, in the embodiment shown, approximately one third of the net width each edge, is additionally guided via guide rails 33 between the bracket 35 and the roller 42. By suitably designing the mentioned guide or aligning means it can be achieved that the length of the path that each individual warp thread 17 travels in the network from the cutting point to the passage gap between the rollers 43 and 44 is the same for all warp threads. This means that the transverse threads 21 and 22 run practically at right angles to the warp threads even when the net is aligned flat and then wound up, or, more precisely, form the same angle with the warp threads as when they are helically wound on the ring ß. Since the width of the finished net, as can also be clearly seen in FIG. 1, is significantly greater than the diameter of the tubular net product, "namely about 1.57 times as large, the outermost warp threads in the net, which are designated in the drawing by 17a are, move outwards in the direction of the axis of the winding roller 46, but the resulting lengthening of the path of these warp threads in comparison with the path of the warp threads 17b in the middle part of the network is compensated for by the extension of the path for the threads 17b, which by the formation of the upwardly directed bracket 35 and the guide rails 30 extending downward from it is achieved.

It should also be noted that the cutting open of the tubular Networkware in two or more individual network structures

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can be done in any suitable manner, e.g. can for cutting of nets made of fiberglass instead of the cutting wires shown, rotating knives are used.

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Claims (8)

Claim e 1.Machine for the production of a non-woven warp thread consisting of crossing warp threads and transverse threads, which are connected to one another at their crossing points, which machine provides a stationary support (6) for a circular-cylindrical or mainly circular-cylindrical layer of warp threads ( 17) has at least one rotating thread layer (29) for laying a transverse thread (21, 22) in a helical shape around the warp thread layer, means (30) for cutting the tubular fabric thus formed into at least two nets and means that each Metz lanes spread from the Aufschneidstelle to a rotatable roller (43) in planar shape over which orphan the spread, plane network is performed by g ekennzeichnet that the spreading agent include a stationary guide rail for the cylindrical tubular fabric on the side facing Side has a curved leading edge (35), the end points of which in the direction of the associated cutting organs ( 30) and which extends from the end points symmetrically outwards from the connecting line between the cutting organs and * in the feed direction of the tubular fabric forwards, so that its center is furthest away from the line mentioned, and that the axis of the rotatable roller (43) runs behind the foremost point of the leading edge (35). 2. Machine according to claim 1, characterized in that the guide edge (35) runs in or essentially in the cylindrical movement path of the tubular fabric. 3. Machine according to claim 1 or 2, characterized in that the axis of the rotatable roller (43) lies behind the line connecting the end points of the guide edge. 4. * Machine according to any one of claims 1-3, characterized in that the leading edge is formed by a curved bracket (35) which between its ends with the help of at least two struts (36) of adjustable length with respect to the frame of the Machine is supported. : 309833/0833 5. Machine according to claim 4, characterized in that between the bracket (35) and the roller (43) there are two stationary guide rails (3Ö) which extend symmetrically from two points between the ends of the bracket and extend outwards in the direction of the Extend ends of the roller. 6. Machine according to claim 5 » characterized in that the connection of the guide rails (3 $) to the bracket (35) takes place in points whose projection onto the axis of the rotatable roller (43) is approximately one third from the respective end of the roller (43 ) lies. 7. Machine according to claim 5 or 6, characterized in that the guide rails (3S) are supported with the aid of struts (36, 41} with adjustable length with respect to the frame of the machine. 8. Machine according to any one of claims 5-7, characterized . that the struts (36) of the bracket (35) and the guide rails (3 &) are connected to the bracket at the same points. . 9 · Machine according to any one of claims 4-O, characterized in that the spreading means comprise a freely rotatable spreader roller (42) with a curved axis attached between the bracket (35) and the rotatable roller (43). 309833/0833 fs Lee rse i te