DE2241826A1 - METHOD AND DEVICE FOR STRINGING LONG STRETCHED MATERIAL - Google Patents

Description

4690 Herne, Freillgrathstraße 19 P.O. Box 140

Pal.-App. Herrmann-Trentepöhl Telephone: 5 1013 51014

Telegrani address: Bähr patents Herne Telex 08 229

Dipl.-Ing. R. H. Bahr Dipl.-Phys. Eduard Betzier Dipl.-Ing. W. Herrmann-Trentepohl

PATENT LAWYERS

8000 Munich S3.40,

Eisenacher Strasse 17 Pat.-Anw. Betzier Telephone: ^

36 30 36 3012 3030

Telegram address: Babetzpat Munich Telex 5215

Bank accounts:

Bayrische Vereinsbank Munich 952 Dresdner Bank AG Herne 7-520 Postscheckkonto Dortmund 558

Ref .: MO 579 ^ Ho / M. Please indicate in the answer

Please send a letter to:

Munich

NATIONAL-STANDARD COMPANY LIMITED

Stourport Road,
Kidderminster, Worcestershire, England

Method and device for stranding elongated material

The invention relates to a method and a device for stranding elongated material.

When making a strand, you twist a plurality of them of lengths of fiber material with each other, and when manufacturing a cable, a plurality of them are twisted together of strands. Various types of machines are known for producing strands, for example with high-speed tube stranding machines, beating machines and seed drills. Twisting of strands

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to form a cable can be done on similar machines.

In order to simplify the terminology for the following description, the term used should be used "Stranding" is the production of strands from fiber material as well as the formation of cables Strands are understood. The term "stranding device" applies to a machine for producing Strands made of fiber material or for the manufacture of cables from strands.

The method and the device according to the invention were developed essentially for stranding metal wires, and the following description is concerned also deal with the stranding of such material. It should be noted, however, that the procedure and the device according to the invention are also suitable for stranding other fiber material, for example for natural fibers and fibers made of plastic.

When stranding wire, the operating speed of the stranding devices is increased by a number of Factors, including the effect of centrifugal force on certain elements of the machine, through the effect of centrifugal force on the product, through the formation of the Lajjer * der Machine, through the generation of heat in the parts of the machine and in the product, and finally by the noises made when the machine is working.

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The invention is primarily concerned with "reducing the amount of heat generated and that generated Noises when stranding wire on stranding devices. Measures to reduce it are currently taking effect the amount of heat generated to the effect that the noise is increased. The reverse is true the same. A high proportion of the noise is aerodynamically generated by parts of the machine and by the pro, duct that travels through the air at high speed. Also becomes a considerable Amount of energy consumed to move the parts of the machine and the product against the air resistance. The losses that occur when moving against the air resistance heat the individual parts of the Machine on.

The problem of noise generation can be taken into account by making the device completely surrounds with a tightly closing shield, which is lined with sound-absorbing material. Unfortunately however, such a completely closing shield prevents air from flowing through the machine. Since the same air is constantly circulating inside the shield, they heat up individual parts of the machine very quickly to an unacceptable level. If you use ventilators in the shield, in order to release part of the air flowing through the machine, noises can also be made at the same time step out.

One possibility, with the double problem of heating and noise generation, if necessary, during operation a stranding device could be encountered,

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would be to provide the machine with a soundproof Surrounding the shield and providing facilities in the shield to keep air in closed To demand circulation in the shielding and to withdraw it from it. This closed circulatory system would in turn have to be made soundproof and would also have to include means to remove those from the shielding to cool extracted air before it is pumped back into the shield. Such a thing System would be both space consuming and expensive.

The invention is based on the object of providing a simple solution to the problems of heat and noise generation to create during the operation of a stranding device.

For this purpose, according to the invention, there is a method for stranding elongated material on a stranding device characterized in that at least part of the stranding process is completed within a Space is carried out in which at least a partial vacuum has been generated.

When using the method according to the invention, the sound generated by the moving parts of the Stranding device and from the moving wire is transferred to a person outside the closed space, very considerably reduced, namely due to the fact that within the closed space is a below atmospheric pressure There is pressure. Consequently, it is not necessary that the walls of the enclosed space actually

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are soundproof. The energy loss due to air circulation within the enclosed space is also reduced Quite a lot of space. This in turn leads to the risk of overheating who removes machine parts ..

The greatest noise reduction would undoubtedly result if the stranding device was used would arrange completely within the enclosed space. However, it can be economical Reasons to be disadvantageous to provide such a large enclosed space. Hence there is a preferred possibility is that only certain parts of the stranding device in at least one substantially to arrange hermetically sealed space from which air has been extracted.

The invention further provides an apparatus for stranding elongated material with a first Holder for spools of the material to be stranded, with a rotating twisting device and with a second holder for a take-up reel for the stranded product. This device is characterized by that at least the revolving Dri-11 device is within an enclosed space is arranged and that an arrangement is provided in order to generate at least a partial vacuum in the enclosed space.

In the case of a tube stranding device for wire, the rotating twisting device is according to the invention

or the tube together with the first bracket inside of the enclosed space. In this case, according to the invention, the stranded product becomes through a wall of the closed space, through a suitable seal, to the take-up reel the second bracket out.

In the case of a single-lay stranding device, the wire is always pulled from the spools outside of the rotating part of the machine, with the rotating twisting device and the take-up reel rotate at high speed. Accordingly, according to the invention for a single-lay stranding device proposed that both the rotating drilling device and the second bracket lie within the enclosed space.

In the case of double-twist twisting devices, the rotating twisting device can either be around the first or rotate around the second bracket. There is also the possibility that a machine with a first rotating Drilling device which rotates around the first bracket and a second rotating drilling device is provided, the latter being around the second bracket rotates. Such a machine is sometimes referred to as a four-lay stranding device designated. Other forms of modification of four-fold twisting devices have also been built, in which counter-rotating drills surround either the first or the second bracket. at Double-twist or quadruple-twist stranding devices are those parts of the machine according to the invention,

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which lead the wire around the first and / or second bracket, arranged within the closed ¹ space. ·

Since in a stranding device according to the invention inevitably air from the environment into the closed Adequate pumping capacity must be provided for the partial vacuum to maintain during the operation of the device within the enclosed space.

'' If there are lubricated elements of the stranding device, for example shaft bearings, within the closed Measures should be taken to prevent the lubricant from being drawn off by the barrel suction device to prevent. For this purpose, for example, the lubricated elements can be hermetically sealed the inside of the enclosed space must be sealed off. One can find this difficulty in some Cases, however, also avoid the fact that the elements, such as the shaft bearings, outside the closed The room. Then you can provide air seals in those places where the waves go into the Imere of the closed space.

Should there be overheating of those parts of the stranding device that are inside the enclosed space become a problem in spite of everything, you can also use cooling of these parts, by, for example, using a water

or oil cooling system.

Further advantages and features of the invention emerge from the following description of exemplary embodiments based on the accompanying drawing. The drawing shows in:

Pig. 1 shows a schematic longitudinal section through a double-twist stranding device (double buncher) the invention;

FIG. 2 shows a section corresponding to FIG. 1 through a tube stranding device for wire (tubular wire stranding machine);

5 shows a section corresponding to FIG. 1 through a single-twist stranding device (single buncher);

FIG. 4 shows a section corresponding to FIG. 1 through a four-fold stranding device (quadruple buncher); FIG.

Fig. 5 is a longitudinal section through a seal for a device according to the invention for guiding Wire into or out of the evacuated, enclosed space.

The device according to the invention according to FIG. 1 comprises a frame 1 with aligned bearings 2 and j5 »in which a rotating drill, consisting from two rotary heads 4 and 5, is arranged.

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The rotary heads 4 and 5 are each provided with shafts 6 and 7, which synchronously with each other via endless, flexible drive elements 8 and 9 are driven by a common drive shaft.

Between the two rotary heads 4 and 5, a first holder 11 is arranged, which by suitable Counterweights are prevented from rotating with the turrets. The holder has a housing 12, which carries aligned shaft stubs 13 and 14 on opposite sides. These are each located in camps 15 and 16 of the rotary heads 4 and 5, the axes of the bearings 15 and 15 with the axes of the bearings 2 and J5 cursing. Four reels I7 for wire are rotatably mounted on shafts 18 within the housing 12. the Shafts l8 are perpendicular to the axes of the bearings 15 and 1.6.

The shaft stub lj> has a central, axial Through hole I9, which is used as a stranding die for serves four wires 2o, which from the coils I7 through the hole can be passed through. After passing through the through hole I9, the stranded wires run to a rotatably mounted on a shaft 22 in the rotary head 4 roller 21 and rollers 23 and 24, which are rotatable stored on the peripheral edges of paddles 25 and 26 are. The latter form parts of the rotary heads 4 and 5. Then the wires run around a roller 27, the is rotatably mounted on a shaft 28 in the rotary head 5. Finally, the wires are threaded through an axial hole 29 guided in the rotary head 5. The stranded wires are pulled out of the bore 29 by means of a reel Jo

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and placed on a take-up reel 3oa by a guide mechanism 3 *. The take-up reel 3oa is attached to a second holder 32.

The features described so far represent standard components of double-twist stranding devices for Wire. During operation of the device, rotation of the drive shaft Io causes the Rotary heads 4 and 5 run synchronously around the housing 11 in order to cause the wires 2o to be stranded, which are withdrawn from the reels 17 via the take-up reel 3oa.

In the device according to FIG. 1, the drilling device is consisting of the rotary heads 4 and 5 * together with the first bracket 11 in a cylindrical, airtight housing 33 included. The axis of this housing is essentially aligned with the axes the bearings 2 and 3. The housing 33 has a peripheral wall 34 and end walls 35 and 36, the latter provided with centrally arranged openings 37 and 38 to allow the shafts 6 and 7 of the rotary heads 4 and 5 to pass through. Annular air seals 39 and 4o are each provided in the openings 37 and 38 in order to provide an airtight seal between the stationary end walls 35 and 36 of the housing 33 and the rotary heads 4 and 5 to effect. The perimeter wall of the housing consists of at least two parts which are hinged to each other via hinges 41 to one easy access to the parts of the stranding device within the housing 33 to allow.

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The housing 33 has an outlet opening 42 which is connected to a vacuum pump 43, namely via a line 44. When the vacuum pump 43 is put into operation, the housing 33 becomes part evacuated. An entry of air into the housing through the bore 29 can largely by suitable Dimensioning of this hole can be prevented. For example, the bore 29 can have a diameter have, which is 0.05 to 0.12 mm larger than the diameter of the stranded wire, which is through the Hole runs through. Depending on the wire diameter, the length of the bore 29 is suitable between 7 * 5 and I5 cm. The bore 29 can iii a separate sleeve 45 (see Fig. 5) is provided be, with the sleeve in "the shaft 7 of the rotary head 5 is arranged. In this way one can equip the device with a number of different sleeves 45, these sleeves on different Wire diameter are adapted.

By partially evacuating the housing 33, the operating personnel monitoring the device can be largely shielded from the noises emitted by the rotating twisting device 4, 5 and by the wires 20 on their way between the coils 17 and the bore 29 generated. There is no need to manufacture the housing 33 ^a US soundproof material. Rather, it can consist of a sound-transmitting material with good thermal conductivity properties, for example sheet metal, so that the heat radiated from the surrounding parts within the housing 33 is transmitted through the housing. This avoids overheating of the parts inside the housing.

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Flg. 2 shows a tube stranding device for Wire, which consists of two sections 5o and 51, of each of which has a common tube 52. A first holder is located inside the tube 53 in the form of a storage rack, which coils 5 ^ for carries the wires. The tubes 52 become synchronous with each other driven by a common drive shaft 55, which in turn is connected to an electric motor 56 connected. Wires 57 migrate from coils 54 through a stranding die 58 and from there into a receiving device 59 for stranded wire. Latter has a take-up reel 60. The parts described so far form standard features of common tube verse eil fixtures for wire.

A stationary, cylindrical housing 61 is arranged around each tube 52, which housing is made of sheet metal, for example consists. The ends of the housing 61 are hermetically sealed against frame members 62 of the device, wherein these frame elements are used for the rotatable mounting of the tubes 52. Each housing 6l has an outlet opening 63, which can be connected to a vacuum pump, not shown so that the interior of the housing can be partially evacuated when the device is operated. as well As with the device according to FIG. 1, each housing 61 preferably consists of a plurality of parts, which are hinged together in a suitable manner for easy access to the individual elements within of the housing.

Fig. 3 shows a single lay stranding machine with frame members 7o in which a peripheral device Drill Jl is rotatably supported by bearings 7 and 73 ^2.

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The rotating twisting device has a holder 74 in which a take-up reel 75 for stranded wire is rotatably attached. The holder 74 is carried by a shaft 76 which is seated in the bearings 72 and is driven by an electric motor (not shown) via an endless, flexible drive element. A tubular stranding head 78, which is rotatably held by the bearings 73, is fastened to the holder 74. The axis of the stranding head 78 is aligned with the axis of the shaft 76. A stationary holder carries a plurality of spools 80 which are rotatably arranged on shafts 81. From the coils 80 through wires 82 by a reel 85 and through the twisting head 78, whereupon it ^f from a Pührungsmechanismus 8j5.> Which is fixed to the bracket 74, placed on the take-up spool 75 we ^ s. The drive devices for both the take-up reel J5 and for the guide mechanism 83 'are not shown in FIG. J5. The parts described so far form standard components of a common single-lay stranding device.

The revolving twisting device "Jl , including the holder for the take-up reel 75, is enclosed in a housing 84 which is airtightly attached to the frame elements Jo may be evacuated when the apparatus is in operation A portion of the housing 84 may be hinged to the frame members 7o to provide easy access to the components within the housing.

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Pig, 4 shows a four-fold twisting device with a rotating twisting device 4, 5, which is shown in FIG essentially corresponds to the construction of FIG. In Fig. 4, the same reference numerals are used to the same or essentially similar parts as in the stranding device according to FIG.

The device according to FIG. 4 has a second rotating drilling device 90, which is composed of frame elements 1 and 91 is held. This second rotary drill includes rotary heads 92 and 95, the run in bearings 94 and 95 of the frame elements 1 and 9I. A holder is rotatable in the rotary heads 92 and 95 90 attached to a take-up spool 97 on which the stranded wire is wound. The bracket 96 sits in bearings 98 and 99 *, each in the Rotary heads 92 and 93 are attached. The two rotating heads 4 and 5 are driven synchronously by a common drive shaft Io, while the common, synchronous drive of the two rotary heads 92 and 93 one Drive shaft loa is used. The rotary heads 4, 5 run in opposite directions with respect to the rotary heads 92, 93 Direction around.

The stranded wire, which comes from the first rotating twisting device 4, 5, runs into an axial opening loo in the rotary head 92 and then around a roller lol which is mounted on the rotary head 92. The wire is then passed through a tubular guide Io2, around one attached to the rotating head 93 Roll Io3, through an axial opening Io4 in the rotary head 93 and then passed to the take-up reel 97, and

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although via a guide mechanism, not shown. A reel, also not shown, can be positioned between the first and the second rotating drilling device to be ordered. In this case, the frame element 1, which supports the rotary heads 5 and 92, is divided into two Parts divided, one of which the rotary head 5 and the other the rotary head 92 receives. The reel then lies between these two frame elements. The parts described so far represent standard elements of common four-fold stranding devices represent.

The rotating drilling devices of this machine, the holder for the wire spools 17 and the holder for the take-up reel 97 for the stranded wire are all in a cylindrical, airtight manner Enclosed housing Io5 which is supported by frame members 1 and 91. Appropriate air seals Io6 and Io7 sit between the housing and the frame elements. The housing Io5 has an outlet opening Io8 for air, which can be connected to a vacuum pump, not shown, around the housing to be partially evacuated when the machine is in operation. As with the device according to FIG. 1, there is the housing Io5 consists of a plurality of hinged parts for easy access to the inside of the housing lying elements.

In all of the devices described above in connection with the drawing, one is specific Leakage of air into the interior of the partially evacuated

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Claims (8)

Claims 1. J method for stranding elongated Ma ^ rffrials on a stranding device, characterized in that at least part of the stranding process is carried out within a closed space in which at least a partial vacuum has been generated. 2. Device for stranding elongated material with a first holder for coils of the to be stranded material, with a rotating twisting device and with a second holder for one Take-up reel for the stranded product, characterized in that the rotating twisting device (4, 5; 52; 71; 4, 5, 9o) is arranged within an enclosed space and that one Arrangement (42, 43, 44; 63; 85; I08) is provided, to create at least a partial vacuum in the enclosed space. 3. Apparatus according to claim 2, characterized in that the first holder (11; 53) is also arranged within the enclosed space. ¹ 4. Apparatus according to claim 3 * characterized in that the stranded product, which leaves the rotating drilling device (4, 5), - 17 - - 309819/0674 through a wall of the closed room, namely through a suitable seal (45), to the take-up spool (3oa) is performed. 5. Apparatus according to claim 2, characterized in that the second holder (74; 96) is also arranged within the enclosed space. 6. Apparatus according to claim 2, characterized in that both the first (H) and the second holder (96) is also arranged within the enclosed space. 7. Device according to one of claims 2 to 6, characterized in that the closed space as a housing (33; 61 j 84; Io5) made of sheet metal is trained. 8. Apparatus according to claim 7 > characterized ge ke nnze rejects that the housing (33J 61; 84; I05) consists of a plurality of parts which are hingedly connected to one another. - 18th 309819/0674