DE2164071A1 - Continuous process for the production of a resilient band-like core from elastic high polymer and device for carrying out the process - Google Patents

Description

FATENTANVIKLTE

DR.E. WIEGAND DIPL-ING. W. NIEMANN 21 6407 1

DR. M. KÖHLER DIPL-ING. C. GERNKARDT

MDNCHEN HAMBURG

9 1 f 0 "W.

TELEPHONE: 395314 2000 HAMB U RG 50, " TELEGRAMS: KARPATENT KONIGSTRASSE 28

W. 25 026/71 12 / Yes

Industrie Pirelli S.p.A, Milan (Italy)

Continuous process for the production of a resilient tape-like core made of elastic High polymer and device for carrying out the

Procedure.

The invention relates to a continuous process and devices for producing a resistant middle layer or a resistant one middle rZernes of conveyor belts, Hieinen or Like. Made of elastic high polymer, and in particular the invention relates to the application of reinforcement cords on this location.

Conveyor belts, belts and the like; Objects show in essentially a middle layer or a middle core in the form of a tape, the layer or the core Has a resistance function, and top layers on top of that and applied under the core. The ribbon-like core

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is based on an elastic high polymer, such as rubber, formed, in particular resistant to bending and reinforced with textile material. The top layers are on the base of elastic high polymer, for example rubber formed, which is particularly resistant to abrasion. If rubber is used, then the structure will vulcanized.

The textile reinforcement for the back was capable core generally comprises a plurality of continuous, mutually parallel longitudinal cords, for example of textile fibers or of metal, which are applied in different ψ modes to the core such that they remain in sighting the length of the core attached to it.

The application can advantageously take place when the ribbon-like core is also in motion. Particularly practical is the application during the continuous production of the core, for example by extrusion or Calendering, whereby the continuous cords are embedded in the core itself.

The longitudinal cords give the conveyor belt, which is provided with the resistant core, a special one Resistance to tensile stress in the longitudinal direction, in addition to providing resistance to tearing Lend in the transverse direction.

In general, apart from having reinforcement in its longitudinal direction, a tape-like core is still provided with a reinforcement in its transverse direction, which is intended to withstand the particularly high hot loads to withstand caused by materials placed on the conveyor belt in use be dropped, which leads to longitudinal tears, i.e. in the direction of movement of the tape.

The application of cross cords made of textile material or metal to the core in the case of continuous production

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ment, however, leads to certain problems that arise when Applying the longitudinal cords does not result in a Direction aligned with the direction of the continuous Manufacture of the core matches.

In the case of known methods for applying the cross cords, the problems raised so far are only partial solved, so that the known solutions have certain disadvantages, which are characterized by the essential features of the applied Procedure result.

The well-known adaptation of a rubberized cord material or string material as a transverse reinforcement is required special and expensive manufacturing processes for joining this fabric to the ribbon-like core.

Also the previously known methods based on the use based on a single continuous thread for the formation of the transverse reinforcement, have proven proved to be very complicated and limiting on the product obtained.

The above-mentioned disadvantages are to be eliminated by the present invention.

The invention aims to provide a continuous process for the production of the resistant core, in which it is possible to rectilinear in a simple manner Applying transverse threads to at least one surface of the core and fixing them in the applied position.

Another purpose of the present invention is to provide a simple apparatus for performing this Procedure to create.

The method according to the invention is characterized in that the application of the threads in the transverse direction is effected in that in continuous succession and under Zig-zag printing of lengths of string taken from a single string on at least one face of the advancing ribbon-like core, which is still in

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is in a plastic state, so that the Cord lengths remain anchored to the surface of the generated core.

The connecting parts of the cord lengths laid in a ziek-zag shape, which have already been laid on the ribbon-like core can be eliminated by cutting, for example if they protrude from the ribbon-like core.

The device according to the invention is characterized in that it consists of a combination of devices results in a pad guiding element which with respect to the advancing core made of high polymer an alternating back and forth movement in the transverse direction is subjected to form the continuous sequence of lengths of cord drawn in zigzag forca, and a roller which is arranged in contact with the advancing core and which is progressively raised can compress the core of laid cord lengths.

For the purpose of the present invention, the term cross-cord or cross-cord length does not only describe a cord or a length of cord arranged at right angles with respect to the longitudinal cords, but also a cord or a length of cord that forms an angle of approximately 90 ° with the longitudinal cord.

The invention is explained below with reference to the drawing, for example.

Fig. 1 is a schematic perspective view of an apparatus according to the invention.

FIG. 2 is a view similar to FIG. 1 of a modified embodiment of a device according to the invention.

The device shown in Fig. 1 essentially comprises a moving thread guide arm 1, which in Cross direction of the advancing band-like core made of elastic high polymer alternately back and forth

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is moved forward and a pressure roller 2 on.

The "movable arm 1 is attached to a frame 3, which is formed by two upright supports 4, which are connected to one another by means of a strip 5, along which a slider 6 connected to the arm 1 slides.

The slide 6, and accordingly the arm 1, is given reciprocating motion by means of a continuous chain 7 which is actuated for rotary motion in a single direction by means of a motor, for example an electric motor not shown in the drawing. More precisely, the slider 6 is provided with two pawls 8 and 8 ¹ , by means of which the slider 6 is brought into engagement alternately with the forward or backward strand of the continuous chain 7.

If desired, other means of connecting the slider 6 to the chain 7 can be used.

The arm 1 carries the cord 11 made of textile fiber or metal, which comes from a spool 10 attached to a Support 9 is attached, which in turn is attached to one of the upright supports 4. The cord 11 is to be placed temporarily on the roller 2, as will be explained below.

The roller 2 is attached to a shaft 12 which is supported by two upright supports 13. The orphan 2 is actuated by a motor, for example an electric motor not shown in the drawing, and forms a pair of rollers with a counter roller 14.

The tape-like core 15 may come from a supply reel if it has been manufactured separately, or it can come directly from a continuous manufacturing device such as an extrusion device, a calender device or other device.

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In Fig. 1, the band-like core 15 is with longitudinal cords 16, which at the time of its manufacture, "for example during its extrusion or its calendering in are stored in it.

When the belt-like core 15 comes out of the pair of rollers 2, 14, it becomes on a continuous conveyor belt 17 collected.

At the two circular edges 18 and 18 'of the Roller 2 is each a row of small pins 19 or 19 '»which are arranged in a radial position. The presence of the rows of small pins 19 and 19 ', which are securely attached to the roller 2, requires that the counter roller 14 has an axial length that is shorter than is the axial length of the roller 2. Furthermore, according to the securely attached to the roller 2 rows of small Pins 19 »19 * the width of the ribbon-like core 15 must not be greater than the distance between these two Rows of pins 19, 19 '.

The small pins 19 and 19 * are intended to hold the string 11 that is being used by the moving Ana 1 comes to form a sequence of string lengths drawn in a ziekxzag shape 11 * which approximates in the direction the generatrix of the roller 2 are arranged.

The small pins 19 and 19 'of the roller 2 are in Circumferential direction at a distance from one another and with respect to one another offset * arranged so that the cord lengths 11 ··, which are placed on the tape-like core 15, themselves are in a position at right angles to the forward movement of the core 15 and accordingly at right angles to the longitudinal cords 16 "

If necessary, the circumferential distance between the small pins 19 »19 * in each row can be chosen so that each length of cord 11 ^{11 placed} on the core 15 is inclined at an angle of approximately 90 °.

The small pins 19 and 19 ^r can instead of them

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securely attached so that they enter the roller 2 radially under pressure. In this case, the width of the tape-like core 15 can be along the axis of the Y / alze 2, be greater than the distance between the two rows of the small pins 19, 19 ', and also the counter roller 14 can then have an axial length, which is at least as long as that of the roller 2.

The operation of the device will now be described.

The speed of the alternating back and forth movement of the thread guide arm 1 is in agreement adjusted with the rotary movement of the roller 2 so that at the end of each stroke a new small pin of the series 19 or the row 19 'is ready to take up the cord 11 to form a cord length 11 *.

The cord 11 carried by the movable arm 1 meets at the end of a stroke, for example, a small pin 19 of the edge 18 as a result of the rotation of the roller 2. The subsequent stroke of the arm 1 in the opposite direction leads to partial winding at the beginning the cord 11 around the small pin 19. At the end of this stroke of the arm 1, the cord 11 meets a small one Pin 19 ', which has now reached the correct position, and this working method continues for all alternating Strokes of arm 1 away.

As a result of the rotation of the roller 2 supporting the small pins 19 »19 'and the reciprocation of the arm 1, the cord 11 remains drawn between a pair of small pins 19 and 19 'and it appears this as a sequence of cord lengths 11 'drawn in zigzag form, which correspond to the generatrix of the roller 2 can, as shown in FIG.

As it rotates, the roller 2 conveys the cord lengths 11 ^f drawn between two narrow pins 19, 19 'in the direction of the cord length made of high polymer

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advancing band-like core 15 and lays the cord lengths 11 'in a sequence on the core 15, the cord lengths then being denoted by 11 "", and where the string lengths 11 ^{lf are} simultaneously pressed against the core in order to penetrate them in the high polymer at least on part of its outer surface, ie on part of its diameter. Such incorporation is made possible by the still plastic state of the high polymer, which is suitably kept in a heated state. "

If the laying of the transverse tendon immediately after the hot production of the ribbon-like made of high polymer Core 15, for example by extrusion, performed, it may be superfluous, the tape-like Subject core 15 to a special heat treatment, since the core 15 is still hot at the end of production »

When the hand Langen 20 showing the different cord lengths 11 ·· connect, projecting from the band-shaped core, as shown in Fig. 1, they will be cut off after the application of the cords on the core 15 by a suitable means T, said cutting but can also take place in a phase after application.

After cutting off, the core 15 made of high-strength polymer shows in the transverse direction in a zigzag shape drawn or stretched cord lengths 11 ^f! that are separated from each other. The band-like core 15, which is provided in this way with a reinforcing structure, which is represented by embedded longitudinal cords 16 and transverse cords 11 *, can now be provided with the cover layers.

There is no risk that the cross cords in front of and suffer improper displacements during this operation, since they at least on part of their outer surface are embedded in the tape-like core 15 made of elastic high polymer.

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The device described so far and the method described so far are for the application of the cord in the transverse direction only on a surface de3 band-like Core 15 adapted. If desired, such a cross-link To apply strengthening cords to both surfaces of the core, two such devices can be attached to the relevant Sides of the core moving forward which then expediently moves in the upward direction will.

When the two devices are arranged facing each other, the cords are applied to the Core on both surfaces at the same time. Since in this case the rollers 2 of the two facing devices face each other, the two opposing rollers concerned can be omitted from these devices *

The application of the cross cords to the two surfaces of the advancing core can, however, also be carried out separately Stations of the plant are carried out, and then by means of two devices that are not opposite each other are arranged.

Fig. 2 shows schematically a further embodiment of a device according to the invention. The device essentially has a thread guide slide 21, which is reciprocated alternately, and a. Orphan 22, which forms a pair of rollers with a counter roller 23. The calibration vorbewegeride band-like core 24 from Eoekpolymeris ^ t the continuous production by- preferably directly from a device is running, for example, from an unillustrated extruder "swisoften the two rollers 22 _t 25 aintoreh, which have the same length · Bas slider 21 slides on one arch-shaped; Ftifor / asg 2§ "eEie provided upstream of the orphan 22 l" t _t m $ si "carries eiacs Sebnttv 2? _t aie of, a 26 comes »by being the arch-shaped. Guided tour 25

and go "beyond" the level of the

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High polymer existing "tape-like core 24 ^ and although approximately at the pressure line or contact line P-P of the orphan 22 on the core 24.

By means of the back and forth movement, the slider lays 21 the cord 27 directly onto the advancing tape-like core 24, namely just before it is released from the latter, is squeezed, the laying in a sequence of zigzag drawn or stretched zigzag lengths 27 'takes place.

For each stroke of the slider 21, which is expediently driven at high speed, a length of cord 27 'of cord 27 drawn in m zigzag form is laid. One end of it remains progressively fixed between the roller 22 and the band-like core 24 during each stroke - and indeed since the end of the previous stroke- The connecting parts 29 of the cord lengths 27 * remain between the edges of the band-like core 24 «

The Einsels chnurläiigen 27, which are compressed by the roller 22 are, stay in the tape-like core and Hochpolyiaerisat at least on a part of their embedded outer surface.

The one with cross cords 27 'and with longitudinal cords 30 provided band-like core 24 is collected on a conveyor belt and brought to the stations where the Top layers are applied.

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Claims (13)

-M- Claims (1Λ Continuous process for manufacturing A tape-like core made of elastic High polymer for conveyor belts, belts and the like., wherein the resistant core is formed from high polymer, which with a plurality of parallel to each other running longitudinal cords and reinforced with a plurality of transverse cords and with cover layers is to be connected, first of all the band-like core is produced, the., longitudinal cords are applied, if desired, already during the manufacture of the core, and thereafter the cross cords are applied, thereby characterized in that the application of the cords in the transverse direction is effected in that in a continuous Follow and drawn under pressure in a zigzag shape or stretched cord lengths that come from a single cord on at least one surface of the still moving forward in a plastic state tape-like core are placed so that the cord lengths remain anchored to the surface of the core produced. 2. The method according to claim 1, characterized in that the lengths of cord laid on the tape-like core the parts connecting the cord lengths are removed by cutting * 3. The method according to claim 1 or 2, characterized in that each length of cord under tension between two points located outside the ribbon-like core are formed and, while held so, subjected to movement towards the core and that in this state any length of cord moved in the direction against the surface of the core under pressure the core is laid, after which the cord length of the said Points is disengaged. 209828/0716 216AQ71 4. The method according to claim 1 or 2, characterized in that each length of cord tensioned in the transverse direction is formed by securing the cord at one end and that the length of the cord is immediately under tension directly on the advancing belt-like Kernel is laid while the length of the string is pressed progressively against the kernel and the pestle is laid by a relative Compression device is caused. 5 «The method according to one of claims 1 to 4, characterized in that the cross cord is long on the straight produced tape-like core made of high polymer are placed fe. 6. Procedure according to one of the. Claims 1 to 4, characterized in that the band-like core is made of high-quality polymer is subjected to a plasticizing heat treatment before the cross cord lengths are placed on it 7. Device for performing the method according to one of claims 1 to 6, characterized by a Pa ~ denführungöelement (1 or 21), which with respect to the core formed from high polymer, moving forward (15 or 24) is alternately moved back and forth in the transverse direction to the continuous position of in zigzag shape tensioned cord lengths (11 'or 27') to form, and by a roller (2 or 22), which is in contact with the W is arranged advancing core and which can move the string lengths progressively placed on the core susaiuaiend « 8. The device according to claim 7, characterized in that the pad guide element has a pad guide arm (1), and that the roller (2) along each of its lateral peripheral edges (18, 18 ¹ ) with a plurality of small pins (19 or 19 '), which are arranged in a radial position and which can temporarily hold the cord lengths (11') formed as the PoIge of the alternating back and forth movement of the arm under tension until they are placed on the ribbon-like core (15) and 209828/0 7 16 ORIGINAL BATHROOM are compressed. 9. Apparatus according to claim 8, characterized in that that the pins (19, 19 ') are arranged on the roller (2) in such a way that they enter the roller radially under pressure, 10. Apparatus according to claim 7, characterized in that that the thread guide element is a thread guide slide (21), which is upstream of the core (24) in contact with the roller (22) on an arcuate Guide (25) is arranged, the ends of which approximate the plane of the high-polymer band-like core cut at the line of pressure contact of the roller with the core and go beyond this plane. 11o Apparatus according to any of claims 7 to 10, characterized in that the (BZV 15? _E 24) with the core an associated on the opposite side of the core G-egenwalze in contact. '. Standing roller (2 or 22) ( 14 or 23) assigned iot. 12. Device according to one of claims 7 to 9 _9, characterized in that the thread guide arm (1) on a slider (6) is Anbra.ch.fc which is displaceable on a sliding guide (5) and has means that alternate with a concerned strand of an endless drive mechanism (7) can come into engagement. 13. Device according to one of claims 7 to 12, characterized marked that, to cross cords on both strings du «Kurria on zub r ing oil, jö eiiiö device on each Side dos Korna is arranged, 14 »Device according to claim 13, characterized in that dLo printing roller dot ¹ blidot a device d Lo (regen.- · v / aLao dir gugemUborlLegemdoti device. 20982 8/07 16
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