CN108806834B - Data cable, cable stranding machine and stranding preparation method of data cable - Google Patents
Data cable, cable stranding machine and stranding preparation method of data cable Download PDFInfo
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- CN108806834B CN108806834B CN201810531676.1A CN201810531676A CN108806834B CN 108806834 B CN108806834 B CN 108806834B CN 201810531676 A CN201810531676 A CN 201810531676A CN 108806834 B CN108806834 B CN 108806834B
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
Abstract
The invention discloses a data cable, a stranding machine for preparing the data cable and a method for preparing the data cable by using the stranding machine. According to the invention, through improvement of equipment, three processes of twisting, aluminum foil dragging and compound twisting are completed in one process, so that the time and the space are saved, the production efficiency is improved, the twisting degree of the compound twisted wire of the data cable, especially the data bus cable, prepared by the method is round, and the subsequent manufacturing is convenient. According to the data cable prepared by the method, particularly a data bus cable, the insulating layer and the sheath layer of the cable are improved, the double insulating layers made of specially selected materials reduce the quality and thickness of the cable and improve the transmission characteristic of the cable, and the double sheath layers made of specially selected materials enable the cable to be more wear-resistant, scraping-resistant, weather-resistant and oil-resistant and have better mechanical strength.
Description
Technical Field
The invention belongs to the technical field of electric wires and cables, and particularly relates to a data cable, a cable stranding machine and a stranding preparation method of the data cable.
Background
At present, the insulation and the sheath of the cable in the automobile industry mainly use polyvinyl chloride materials, and are relatively simple to manufacture and low in cost. However, due to the reasons of simple process structure, large material proportion, large dielectric loss and the like, the product is relatively single in use, cannot be used integrally, is relatively heavy in cable and relatively weak in information transmission performance, and at present, the transmission requirements of various industries on information acquisition, analysis and feedback systems in intelligent manufacturing production are higher and higher, and the required speed is higher and higher. The material and structure of the common cable cannot meet the use requirement.
The process of traditional multi-bus cable manufacturing internal stranding cabling needs three processes of pair stranding, wrapping and cabling, the production efficiency is low, the structural stability of the cable after the processes are carried out for many times is poor, the internal structure of the manufactured cable is loose, and the overall outer diameter is large.
The traditional cable sheath is made of a single material, and although the traditional cable sheath is time-saving and labor-saving in manufacturing, the comprehensive performance of the cable is very limited, and the traditional cable sheath cannot meet harsh use conditions and use environments. In addition, due to the limitation of processing cost and the process design of the cable, the excellent material cannot be widely applied.
Disclosure of Invention
The present invention provides a data bus cable, a manufacturing apparatus and a method thereof for solving the problems in the prior art. The invention aims to provide a stranding machine for improving the production efficiency of cables and a preparation method thereof, and provides a data cable with compact structure and good comprehensive performance.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows.
A cable stranding machine comprises a bracket, a horizontal supporting rod, at least one branching plate, at least two die holders, a cabling guide device, at least two drawing and wrapping devices and a tractor; become cable guider leading edge demountable installation have always press die device, the tractor sets up become cable guider rear, its characterized in that: two ends of the horizontal supporting rod are respectively detachably fixed on the bracket and the cabling guide device, and the wire distributing plate is detachably and fixedly arranged on the horizontal supporting rod; the at least two die holders are sequentially detachably mounted on the horizontal support rod and can rotate around the horizontal support rod when not fixed, the at least two die holders are arranged between the cabling guide device and the distributing plate, and included angles are formed between every two die holders and are not coplanar; the at least two dragging devices are respectively arranged at two sides of the horizontal supporting rod.
The cable-forming guide device comprises a cable-forming guide device, a winding device and a belt storage rack, wherein the winding device and the belt storage rack are sequentially arranged at the rear end of the cable-forming guide device; the wrapping storage rack is arranged between the wrapping device and the tractor.
A method of manufacturing a data cable using the above-described stranding machine has the following steps.
And (110) preparing insulated cable cores, preparing the insulated cable cores to be twisted and grouping, wherein each insulated cable core is transmitted by each guide wheel device.
And (111) sequentially installing at least one distributing plate and at least two die holders on the horizontal supporting rod, and respectively fixing two ends of the horizontal supporting rod on the upper end of the support and the front side surface of the cabling guide device.
Step (112), rotating at least one distributing board around the horizontal supporting rod, enabling the distributing boards to form included angles and unfairness planes when the number of the distributing boards is more than 2, and then preliminarily fixing; at least two die holders rotate around the horizontal support rod, so that included angles and unfairness planes are formed between the die holders, and then the die holders are preliminarily fixed.
And (113) respectively penetrating the to-be-stranded insulated cable cores in each group through the threading holes in the distributing board, penetrating each pair of insulated cable cores through the pressing die in the common pressing die frame, penetrating the insulated cable cores of all groups into the cabling guide device through the total pressing die on the total pressing die device, sequentially penetrating the wrapping device and the tape storage frame, and finally penetrating the insulated cable cores into a tractor.
And (114) placing a plurality of dragging packages at two sides of the horizontal support rod, wherein each group of insulating cable cores is matched with one dragging package device, and an aluminum foil tape on each dragging package device penetrates through a pressing die on a pressing die frame and then a corresponding group of insulating cable cores are wound to complete the winding work of all groups.
Step (115), starting a stranding machine, and performing pair twisting, bale pulling and compound twisting on the insulated cable core at the same time; or carrying out pair twisting, dragging wrapping and complex twisting on the insulated cable core at the same time, and then wrapping the insulated cable core until the completion.
And (116) closing the stranding machine after stranding is finished, finishing the lapped wire, and shearing off the unsuccessful head and tail parts.
And (117) attaching the ground wire, the braided shielding layer and the extruded sheath to the cut-off lapped wire to form the data cable.
Specifically, if the step of rewinding is not required, the step (113) does not need to be provided with a winding device and a wrapping tape storage rack.
The data cable prepared by the method comprises a compound stranded wire, a braided layer and a double-layer co-extrusion sheath in sequence from inside to outside, wherein the double-layer co-extrusion sheath consists of an inner sheath and an outer sheath, a grounding wire is arranged beside the compound stranded wire, the braided layer coats the compound stranded wire and the grounding wire, the inner sheath coats the braided layer, and the outer sheath coats the inner sheath; the compound stranded wire is formed by compound twisting of a first aluminum-clad wire and a second aluminum-clad wire, the two aluminum-clad wires are respectively formed by inner layers formed by twisting two insulated cable cores and single-sided aluminum foils coated on the outer layers, and each insulated cable core is formed by a conductor and double insulating layers for coating the conductor; the double-insulation-layer composite insulation board is characterized in that the double-insulation layer sequentially comprises a main insulation layer and an insulation outer skin from inside to outside, the main insulation layer is made of a foamed polyethylene insulation layer, and the insulation outer skin is made of a high-density polyethylene solid outer skin; the material of inner sheath is thermoplastic elastomer material TPE, and the material of oversheath is polyurethane material PU.
The beneficial technical effects of the invention are as follows:
(1) the tinned copper stranded conductor has the advantages of good softness, better corrosion resistance and longer service life.
(2) The insulating material is changed, the original polyvinyl chloride material is replaced by the PE material with the foam skin structure, and the material has better equivalent dielectric constant. Not only can transmit certain current, but also can bear signal transmission under high frequency. Realize the switching use of one cable for multiple purposes.
(3) The cable structure is redesigned, the structure of the symmetrical cable is used for replacing the original wiring harness consisting of single wires, the laying space is reduced, and the cost is saved.
(4) Each pair of independent aluminum foil and ground wire shields are not interfered with each other during transmission. The structure is more fixed, and the performance is more superior, and whole cable is littleer, weight is lighter.
(5) The tinned braid is used as a total shield, so that the anti-interference capability of the cable is better, and the electric tensile strength is higher, safe and reliable.
(6) The TPE + PU double-layer co-extrusion sheath is good in softness, more wear-resistant, scratch-resistant, weather-resistant and oil-resistant, and better in mechanical strength.
Drawings
FIGS. 1 to 4 are schematic structural views showing a part of the construction of the stranding machine of the present invention.
FIGS. 5 and 6 are simple flow charts of the operation of the stranding machine of the present invention.
Fig. 7 is a schematic diagram of the stranded wire structure of the present invention.
Fig. 8 and 9 are schematic structural diagrams of a data cable according to the present invention.
Wherein, 1-a die holder; 2-a line distribution board; 3-horizontal supporting rods; 4-a bale pulling device; 5-wrapping the device; 6-a cabling guide; 7-bag belt storage rack; 8-cable core twisted pair;
11-a die box; 12-height adjustment knob; 13-die support post; 14-angle adjusting knob; 15-a first ferrule; 21-a scaffold; 41-tensioning wheel; 42-a rotating wheel; 43-aluminum foil trays; 44-a spring arrangement; 61-the front side of the cabling guide; 63-the rear end of the cabling guide; 62-total die pressing device; a-a first insulating cable core; b-a second insulated cable core; c-a third insulated cable core; d-a fourth insulated cable core; 4 a-a first bale pulling device; 4 b-a second bale pulling device; 1 a-a first die carrier; 1 b-a second die holder; 81-first cable core twisted pair; 82-second cable core twisted pair; e-a first aluminum foil strip; f-a second aluminum foil strip; 91-first pulling the aluminum foil twisted pair; 92-second pulling and wrapping the aluminum foil twisted pair; 10-pulling and wrapping the compound stranded wire; g-a third aluminum foil strip; 101-lapping wires; 102-a tractor; a 111-conductor; 112-a primary insulating layer; 113-an insulating sheath; 114-ground line; 115-a braid layer; 116-an inner sheath; 117-outer sheath; 118-single sided aluminum foil; 119-outer aluminum foil.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows a stranding machine according to the preamble of the present invention, comprising at least one die holder 1 and at least one distribution board 2, both the die holder 1 and the distribution board 2 being mounted on a horizontal support bar 3. Wherein, die carrier 1 comprises moulding-die box 11, moulding-die support column 13 and 15 three-sections of first lasso, 11 hollow position installation moulding-dies of moulding-die box, first lasso 15 overlaps on horizontal support rod 3, angle adjusting button 14 has on the first lasso 15, angle adjusting button 14 can fix first lasso 15 on horizontal support rod 3 when screwing on the one hand, prevent that lasso 15 is not hard up, on the other hand angle adjusting button 14 makes first lasso 15 not hard up when unscrewing, make it can freely rotate around on the horizontal support rod 3. The first ferrule 15 is connected with a pressing die supporting column 13, a height adjusting rod and a height adjusting button 12 are arranged on the pressing die supporting column 13, the height adjusting button 12 can control the height adjusting rod to be fixed, ascend and descend, the height adjusting rod of the pressing die supporting column 13 is connected with a pressing die box 11 and used for supporting the pressing die box 11 on one hand, and the height of the pressing die box 11 is adjusted on the other hand, so that the pressing die box and the distributing board 2 have proper relative positions when a cable is twisted. According to the invention, at least two compression moulding frames 1 can be mounted on the horizontal support bar 3. In addition, the die holder 1 can also be detachably fixed on the horizontal support rod 3 by adopting other existing modes as long as the die holder can rotate around the horizontal support rod 3. The present invention may also be used to adjust the height of the die support posts 13 in other conventional ways. The die holder 1 can be removed from the horizontal support bar 3. When a plurality of pairs of wires are required to be simultaneously twisted, a plurality of die holders 1 can be arranged in the front and back direction, and the plurality of die holders 1 are rotated to be staggered by a certain angle, so that the use of operation is not influenced. The angle and height of the die holder are adjustable, and other common adjusting structures in the prior art can be adopted for adjustment, such as height adjustment through a telescopic structure.
Referring to fig. 2, the present invention also includes a bale pulling device 4, the bale pulling device includes an aluminum foil tray 43 on which the aluminum foil strip is wound, the bale pulling device 4 is provided with two rotating wheels 42, a tension wheel 41 and a spring device 44, the two rotating wheels 42 and the tension wheel 41 are triangular, the tension wheel 41 controls the tension degree thereof by the back and forth movement of the spring device, so that the tension wheel 41 controls the pressure of the aluminum foil strip when the aluminum foil tray 43, the two rotating wheels 42 and the tension wheel 41 cooperate with each other to output the aluminum foil strip. However, the bale pulling device of the present invention is not limited to the bale pulling device 4 of the present invention, and may be a bale pulling device of the prior art.
Referring to fig. 1 and 3, in the stranding machine of the present invention, the front end portion of the horizontal support bar 3 is detachably fixed to the bracket 21, and the distal end of the horizontal support bar 3 is detachably fixed to the cabling guide front face 61 of the cabling guide 6. The die holder 1 is arranged between the tail end of the horizontal support rod 3 and the distributing plate 2. The cabling guide 6 comprises a die assembly 62, see fig. 3, through which the wires to be twisted are led to the cabling guide 6 via a die assembly on the die assembly 62 on the front side 61 of the cabling guide. The total die assembly 62 is detachably mounted on the cabling guide 6. The total pressing die device 62 is provided with a total pressing die, and the cabling guide device 6 enables the stranded wires to be stranded to form a certain stranding pitch.
The lower end of the distributing plate 2 is detachably fixed on the horizontal support rod 3 through a second ferrule and can rotate around the horizontal support rod 3. The distributing board can be fixed on the horizontal support rod 3 by arranging at least one screw on the second sleeve ring, and when the adjusting button is loosened, the distributing board 2 can rotate around the horizontal support rod 3 or be taken down from the horizontal support rod 3. When a plurality of pairs of wires are required to be simultaneously twisted, a plurality of distributing plates 2 can be arranged in front and back in order to adjust the angle between the wires, and the plurality of distributing plates 2 are rotated to be staggered by a certain angle, so that the use of operation is not influenced. The angle and height of the wire distributing plate can be adjusted without being limited to the above, and other common adjusting structures in the prior art can be adopted for adjustment, such as height adjustment through a telescopic structure.
In summary, the horizontal support bar 3 is fixed to the bracket 21 and the cabling guide 6 during operation, and at least one distribution board 2 and at least one die holder 1 can be mounted on the horizontal support bar 3 as required, thereby simultaneously twisting a plurality of pairs of wires. When not needed, the horizontal support rod 3 can be detached without occupying space.
Referring to fig. 4 and 6, fig. 4 shows a preamble of the stranding machine of the present invention. The subsequent part of the stranding machine of the invention comprises a cabling guide device 6, a wrapping device 5 and a tape storage rack 7 mounted on the cabling guide device 6 and a tractor. Stranding guiding device 6 is the common stranding machine of prior art, and the installation can be according to the rotatory package device 5 that winds of certain direction on the stranding guiding device 6, has third aluminium foil area g on the package device 5, and the cable of transposition is worn out from winding package device 5 centre bore, winds package device 5 with rotatory mode with third aluminium foil area g around the package on the cable of transposition, stores the frame 7 through the band and keeps behind the horizontal balance by tractor 102 traction and go out, and the band stores the frame 7 and can also prevent that the cable from transitionally shaking. Both the wrapping device 5 and the tape storage rack 7 can be the ones already existing in the prior art. The wrapping device 5 and the tape storage rack 7 are sequentially detachably fixed at the rear end 63 of the cabling guide device 6. The tractor 102 is a tractor apparatus commonly found in the prior art.
In another embodiment of the present invention, since the double-layer aluminum foil shielding is not required, the wrapping device 5 can be removed normally, and the twisted cable is not wrapped again by aluminum foil, so that the cable core is directly threaded into the taping storage rack 7 after being twisted by the cabling guide 6.
The invention is described in detail below with reference to specific embodiments of the invention and a method for simultaneously cabling a pair, a bale and a compound strand using the stranding machine. In the data cable according to the embodiment of the present invention, the composition of two pairs of cable core twisted wires is taken as an example.
A stranding machine for preparing cables comprises a support 21, a horizontal supporting rod 3, at least one wire dividing plate 2, at least two die pressing frames 1, a cabling guide device 6, at least two dragging devices 4 and a tractor 102, and is characterized in that two ends of the horizontal supporting rod 3 are detachably fixed on the front side surfaces of the support 21 and the cabling guide device 6 respectively, and the wire dividing plate 2 is detachably and fixedly installed on the horizontal supporting rod 3; at least two die holders 1 are sequentially detachably and fixedly arranged on a horizontal support rod 3 and rotate around the horizontal support rod 3 in a non-fixed state, the die holders 1 are arranged between the horizontal support rod 3 and a distributing plate 2, and included angles are formed between the at least two die holders 1 and are not coplanar; the tractor 102 is arranged behind the cabling guide device 6; at least two bale pulling devices 4 are respectively arranged at two sides of the horizontal supporting rod 3.
Further, still including around packing device 5 and band storage rack 7, install in proper order at the rear end 63 of stranding guiding device 6 around packing device 5, band storage rack 7, be the detachable installation around packing device 5.
Further, the line distribution plate 2 can rotate around the horizontal support rod 3 in an unfixed state.
Further, the height of the die holder 1 is adjustable.
Further, the wire distributing plates 2 are at least two and are respectively and sequentially arranged on the horizontal supporting rods 3, and included angles are formed between the wire distributing plates and are not coplanar.
The cabling guide 6, the wrapping device 5, the taping storage rack 7, the perforations of the tractor 102 are kept on the same horizontal line so that the cables are not bent or the like.
Specifically, the following describes a specific process flow for preparing a data cable according to the present invention with reference to fig. 1 to 7.
And (110) preparing insulated cable cores, preparing the insulated cable cores to be twisted and grouping the insulated cable cores, wherein each insulated cable core is transmitted by each guide wheel device.
In this step, the insulated cable core is the main part of the data cable for realizing conduction and communication, and the insulated cable core is composed of a conductor and an insulating layer for coating the conductor. The insulated cable cores are typically twisted in pairs, or may be twisted in more than three.
And (111) sequentially mounting at least one branch plate 2 and at least two die holders 1 on the horizontal support rod 3, and respectively fixing two ends of the horizontal support rod 3 on the bracket 2 and the front side surface 61 of the cabling guide device.
In the step, the appropriate number of the distributing boards 2 and the die frames 1 are selected according to the number of the insulating cable cores to be stranded, and all the die frames are arranged between the horizontal support rods 3 and the distributing boards 2. For example, in fig. 6, since the data cable requires two pairs of insulated cores, the distribution board 2 has a large diameter and many threading holes, one distribution board is selected, the first insulated core a and the second insulated core b are twisted to form a pair, and the third insulated core c and the fourth insulated core d are twisted to form a pair. Two die holders 1, namely, a first die holder 1a and a second die holder 1b are sequentially installed on the horizontal support bar 3.
Step (112), at least one distributing board 2 is rotated around the horizontal support rod 3, when more than 2 distributing boards 2 are arranged, included angles and unfairness planes are formed among the distributing boards 2, and then the distributing boards are preliminarily fixed; at least two die holders 1 rotate around the horizontal support rod 3, so that included angles and unfairness planes are formed between the die holders 1, and then the die holders are preliminarily fixed.
In this step, the positions of the wire distributing plate 2 and the die holder 1 are roughly adjusted according to actual conditions. For example, the number of groups of insulated cable cores to be twisted, and the number of insulated cable cores in each group, may be arranged appropriately. Referring to fig. 5, one embodiment of the present invention, a line distribution board 2 and two angled die holders 1 are selected. Therefore, the insulated cable cores are not crossed, shielded and wound.
And (113) respectively penetrating the to-be-stranded insulated cable cores in each group through the threading holes in the distributing board 2, penetrating each pair of insulated cable cores through the pressing die in the common pressing die frame 1, penetrating the insulated cable cores of all groups into the cabling guide device 6 through the total pressing die on the total pressing die device 62 of the cabling guide device 6, sequentially penetrating through the wrapping device 5 and the tape storage frame 7, and finally penetrating into a tractor.
Because each group of the to-be-twisted insulated cable cores are firstly twisted at the utmost, the to-be-twisted insulated cable cores in each group need to select the threading holes at the proper positions on the distributing board 2 and penetrate into the same die pressing frame 1. Care is taken not to cross or twist each group with each other. And finally, all the groups of the insulated cable cores to be stranded penetrate through the through holes on the total pressure die device 62. Then sequentially passes through the wrapping device 5 and the wrapping storage rack 7 and finally passes through the tractor. Taking fig. 5 to 7 as an example, the first insulating cable core a and the second insulating cable core b form a pair, the third insulating cable core c and the fourth insulating cable core d form a pair, the first insulating cable core a and the second insulating cable core b penetrate the first die holder 1a after passing through the threading hole 2, and the third insulating cable core c and the fourth insulating cable core d penetrate the second die holder 1b after passing through the threading hole 2. Then, two pairs of the first insulated cable core a, the second insulated cable core b, the third insulated cable core c and the fourth insulated cable core d jointly penetrate through a main pressing die of the first main pressing die device 61, pass through the cabling guide device 6 and the tape storage rack 7 again, and finally enter the tractor 102. When the equipment is started, the first insulating cable core a and the second insulating cable core b are twisted in pairs to form a first cable core twisted pair 81, and the third insulating cable core c and the fourth insulating cable core d are twisted in pairs to form a second cable core twisted pair 82. As the cable advances, the first cable core pair 81 and the second cable core pair 82 are subjected to complex twisting. The wrapping tape storage rack is used for storing wrapped aluminum tapes on one hand, and is used for guiding and balancing the cables coming out of the cabling guide device 6 on the other hand so as to be convenient for entering the tractor. The cabling guide 6 has a hollow duct inside to let the strands enter the previous wrapping system, but with a certain pitch in the process. When the cabling guide device 6 and the tractor 102 are started, each group of the insulated cable cores to be stranded automatically twists and advances while the insulated cables advance, the cabling guide device 6 is provided with a total pressure die device 62, and multiple stranding is carried out between the groups. The twist pitch within each group and the twist pitch from group to group are guaranteed to be very close. The conductor matching performance is better, and finally, the arrangement among the insulated cable cores is quite round. In the prior art, after each group of insulated cable cores are twisted respectively, the twisting pitches are greatly different by carrying out complex twisting, the arrangement is not round enough, and even the extreme condition of side-by-side arrangement is generated, so that the use performance and subsequent coating of the cable are not influenced.
And (113-a) finely adjusting the angles of the distributing board 2 and the two die holders 1, and then fixing again.
Since the angle between the cables may be inappropriate when the step (113) is completed, the distribution board 2 and the two die holders 1 need to be slightly loosened, finely adjusted to a more appropriate position, and fixed again. However, this step is not essential and may not be used.
And (114) placing a plurality of dragging packages at two sides of the horizontal support rod 3, wherein each group of insulated cable cores is matched with one dragging device, and an aluminum foil tape on each dragging device penetrates through a pressing die on a pressing die frame to wind a group of corresponding insulated cable cores, so that the winding work of all groups is completed.
In order to realize that the pair twisting, the pulling wrapping and the compound twisting are finished in the same process, the aluminum foil is used for shielding the signals of each group and the insulated cable cores between each group, so the aluminum foil needs to be wound before the compound twisting, and therefore, the aluminum foil is wound after each group of insulated cable cores pass through the pressing die. For this step (114), the insulated cable cores to be twisted in each group can be respectively passed through the threading holes on the distributing board 2 in the step (113), each pair of insulated cable cores is passed through the pressing die in the common pressing die frame 1, and all groups of insulated cable cores are passed through the total pressing die of the total pressing die device 62 of the cabling guide device 6 into the cabling guide device 6, so as to avoid the shedding of the aluminum foil after the system is started. Referring to one of the embodiments of fig. 5, a first pulling-up package device 4a is placed at a side close to the first press frame 1a, and a first aluminum foil tape e on the first pulling-up package device 4a is wound around the first and second insulated cable cores a and b. For wrapping of the aluminum foil, the aluminum face-out tow is the preferred embodiment of this embodiment.
And (114-a), winding the aluminum foil tape on the wrapping device 5 outside all the groups of insulated cable cores.
In the step, the cable after compound twisting is subjected to overall aluminum foil wrapping in order to start the system, so that external secondary shielding is realized, and meanwhile, the covering operation of the outer layer structure in the later period is also performed. The step can also be carried out when all the groups of insulated cable cores pass through the wrapping device 5, so that the aluminum foil tape is prevented from falling off after the system is started. In another embodiment of the present invention, since the double-layer aluminum foil shielding is not needed, the wrapping machine can be removed normally, and the multiple stranded wires are not wrapped again, so that the cable core is directly threaded into the traction machine 102 after being stranded by the cabling guide 6. Therefore, this step is not a necessary step. When need not to wrap, can need not to twine the aluminium foil area outside insulating cable core, also need not start wrapping the device.
Step (115), starting a stranding machine, and performing pair twisting, bale pulling and compound twisting on the insulated cable core at the same time; or the insulated cable core is subjected to pair twisting, dragging wrapping and complex twisting at the same time, and then the wrapping is carried out until the completion.
In the step, with the twisting starting, the inner portion of each group of insulated cable cores is twisted to form cable core twisted pairs, the cable core twisted pairs are wrapped with aluminum foil by a dragging device to form dragging wrapping wires, and the dragging wrapping wires are subjected to compound twisting to form dragging wrapping compound twisted wires, and the twisted pairs, the dragging wrapping and the compound twisting are simultaneously completed in the same process and then are pulled out by the tractor 102. The cost is reduced, the working procedures are saved, and the production efficiency is improved. And, the twist pitch within each group and the twist pitch between groups are guaranteed to be very close. The conductor matching performance is better, the final insulation cable cores are arranged in a round manner, in the prior art, after each group of insulation cable cores are twisted, re-twisting and wrapping are carried out respectively, so that the twisting pitch in each group is greatly different from the twisting pitch between the group and the group, the arrangement is not round enough, even the extreme conditions of side-by-side arrangement occur, and the use performance and subsequent coating of the cable are influenced. In addition, the arrangement is compact and round, the occupied space is small, the diameter of the lapped wire is reduced, and the thinner or more specified data cable can be prepared. When double-layer shielding is needed, the aluminum foil tape is wrapped on the dragging and wrapping composite stranded wire after composite twisting to form a wrapping wire. Referring to fig. 5-7, the first insulating cable core a and the second insulating cable core b form a pair of twisted pairs to form a first cable core twisted pair 81, and the first cable core twisted pair 81 wraps the first aluminum foil strip e to form a first wrapped aluminum foil twisted pair 91; the third insulating cable core c and the fourth insulating cable core d form a pair of twisted pairs to form a second cable core twisted pair 82, and the second cable core twisted pair 82 drags a second aluminum foil strip f to form a second dragged and wrapped aluminum foil twisted pair 92; the first dragging-wrapping aluminum foil twisted pair 91 and the second dragging-wrapping aluminum foil twisted pair 92 are twisted again to form dragging-wrapping composite twisted pair 10, the dragging-wrapping composite twisted pair 10 is wrapped with a third aluminum foil tape through a wrapping device 5 to form a wrapping wire 101, and the wrapping wire is pulled out by a tractor through a wrapping storage rack 7. For wrapping of the aluminum foil, the aluminum face out tow is the preferred embodiment of this embodiment.
And (116) closing the stranding machine after stranding is finished, finishing the lapped wire, and shearing off the unsuccessful head and tail parts.
The head and the tail of the whole wire only play a pulling role, a real lapping wire is not formed, and the wire does not accord with the regulation, so the wire needs to be cut.
And (117) attaching the ground wire, the braided shielding layer and the extruded sheath to the cut-off lapped wire to form the data cable.
According to the technical scheme of the invention, not only a data cable but also a data bus cable and other cables can be formed.
The data cable with excellent comprehensive performance of the present invention is specifically described below, and particularly relates to a data bus cable.
Referring to fig. 8, in an embodiment, a data cable sequentially comprises a twisted wire, a braided layer 115 and a double-layer co-extruded sheath from inside to outside, wherein the double-layer co-extruded sheath comprises an inner sheath 116 and an outer sheath 117, a grounding wire 114 is arranged beside the twisted wire, the braided layer 115 coats the twisted wire and the grounding wire 114, the inner sheath 116 coats the braided layer 115, and the outer sheath coats the inner sheath 116; the compound stranded wire is formed by compound twisting of a first aluminum-clad wire and a second aluminum-clad wire, the two aluminum-clad wires are respectively formed by inner layers formed by pair twisting of two insulating cable cores and single-sided aluminum foil 118 coated on the outer layers, and each insulating cable core is formed by conductors 111 and 120 and double insulating layers for coating the conductors; the double-insulation-layer solid core insulation structure is characterized in that the double-insulation layer sequentially comprises main insulation layers 112 and 121 and insulation outer skins 113 and 122 from inside to outside, the main insulation layers 112 and 121 are made of foamed polyethylene insulation layers, and the insulation outer skins 113 and 112 are made of high-density polyethylene solid core outer skins; the inner sheath 116 is made of thermoplastic elastomer (TPE) and the outer sheath 117 is made of Polyurethane (PU).
In this embodiment, the conductor 120 of each insulated cable core in the first aluminum-clad wire is 18AWG, and the conductor 120 is formed by twisting 19 round tinned copper wires, each of which has a diameter of 0.22mm to 0.28mm, specifically, a diameter of 0.25 mm. The double insulation layers of the insulated cable core of the first aluminum-clad wire are formed by co-extrusion of a polyethylene foam insulation as the main insulation layer 121 and a high density polyethylene solid core sheath as the insulation sheath 122. The total thickness of the double insulation layers is 1.25mm-1.35mm, specifically, the thickness is 1.30mm, the total outer diameter of the double insulation layers is 3.80mm-4.00mm, specifically, the total outer diameter is 3.90 mm. Typically, the insulating sheath 122 is a thin layer, typically between 0.05mm and 0.3mm, and more particularly, between 0.15mm and 0.25 mm. The two insulated cable cores are respectively brown and blue. The conductor 111 of each insulated cable core in the other aluminum-clad wire, namely the second aluminum-clad wire, adopts the specification of 20AWG, the conductor 111 is formed by twisting 19 tinned copper wires, and the diameter of each tinned copper wire is 0.15-0.21mm, specifically, the diameter is 0.18 mm. The double insulation layers of the insulated cable core of the second aluminum-clad wire are formed by co-extrusion of a polyethylene foam insulation as the main insulation layer 112 and a high-density polyethylene solid core sheath as the insulation sheath 113. The total thickness of the double insulation layers is 0.80mm-0.90mm, specifically, the thickness is 0.85mm, the total outer diameter of the double insulation layers is 2.50mm-2.7mm, specifically, the total outer diameter is 2.6 mm. Typically, the insulating sheath 113 is a thin layer, typically between 0.05mm and 0.2mm, and more particularly between 0.15mm and 0.15 mm. The two insulated cable cores are respectively red and green. The tin-plated copper stranded conductor has good flexibility, is easy to bend, move, lay and connect, is not easy to oxidize and deteriorate, and is easy to weld. For the stranding of the tinned copper wire conductor, the optimized stranding pitch is adopted, and the conductor is stranded and rounded in a regular arrangement. In order to improve the bending resistance of the cable, a class 5 stranded conductor is adopted, a single copper wire is small, the pitch is 10-12X D (the diameter after stranding) during stranding, so that the conductor is better in flexibility, smaller bending radius can be obtained, and welding and assembly are easy. The aluminum surface is pulled outwards to form the pulling covered wire, namely the aluminum covered wire.
In the invention, the insulating layers of the insulating cable core all adopt a foamed PE + HDPE double-layer structure, so that the cable core has excellent electrical performance, smooth surface and good mechanical strength, and the main insulating layer 112 of the inner layer is not easy to deform. On the other hand, in production, the color separation can be performed by using the insulating outer skin 113, and the main insulating layer 112 can realize insulating coloring without replacement, thereby greatly improving the production efficiency and reducing unnecessary material loss. The insulation structure is designed into a double-layer structure, the production process of the high-frequency signal transmission cable is adopted, and the foamed PE main insulation and the solid PE are adopted as protective insulation skins. The original common extruder can realize the bubble skin co-extrusion by improving the structure of the die without investing equipment again. The main insulating material is DOW3485 material which is self-foaming HDPE and is heated at the temperature of 180-220 ℃ in combination with the corresponding extrusion speed, so that the foaming degree required by the design of the cable is obtained. The skin insulation with protective properties is selected as follows: DOW3364 HDPE material, which is used as solid insulation layer for communication cable, has good electrical insulation performance, is suitable for thin-wall high-speed extrusion, has smooth surface and certain mechanical strength, can perfectly protect the inner foaming insulation layer, and can wrap the air holes to keep the integrity of insulation even if the inner foaming degree reaches 50%. The skin may be colored for differentiation in use. Reduce material waste and improve production efficiency. Through water capacitance monitoring system, insulating foaming degree and homogeneity can be controlled to the capacitance value of insulated wire in aqueous to more visual control product quality. The main insulation is foam HDPE, the specific gravity is low, the equivalent dielectric constant is relatively low, and the insulation thickness can be relatively thinner when the same performance is required, so that the thickness of the whole data cable is further reduced.
The compound stranded wire of the data cable can be formed by adopting the preparation method, three manufacturing processes of simultaneously twisting two groups of insulated cable cores to form two groups of stranded wires, respectively wrapping the two groups of stranded wires with the single-sided aluminum foil 118 to form two groups of aluminum-clad wires and twisting the two groups of aluminum-clad wires to form the compound stranded wire are completed in the same process, and the multi-pair one-time twisting shielding process ensures that the cable is twisted more tightly, the cable is more round and has smaller twisting outer diameter compared with the conventional process. The laying space is saved, and the overall weight of the cable is greatly reduced. The single-sided aluminum foil shielding is twisted and wrapped separately on the insulating cores, and one-time twisting is completed through transformation of equipment. Not only improves production efficiency, and the transposition is inseparabler, and the whole external diameter of cable is little, and single is more stable to independent relative structure, and the performance is superior after the shielding. A symmetrical double-twisted structure and shielding with aluminum foil alone. Through the transformation of the twisted pair cabling, the twisted pairs, the aluminum foil dragging and the compound cabling of a plurality of twisted pairs can be realized at one time, and the three processes are combined and finished in one process at the same time. The production time is saved, more importantly, the arrangement is neat, and the twisting is tighter, so that the diameter of the finished product is greatly reduced. When the cable has the requirements of both characteristic impedance and outer diameter upper limit, the conventional production process may not meet the requirements, and the single-screen co-twisting process can be realized. The individually shielded symmetrical communication lines minimize crosstalk interference with each other, which is far superior to unshielded or total screen cables in terms of transmission performance.
In the data cable of the present invention, the formed composite twisted wire is simultaneously followed by a ground wire, and a twisted wire formed of 19 tin-plated copper wires is used as the ground wire. The braided layer is braided outside the compound stranded wire and the grounding wire, the braided layer is braided by 24 strands, each strand adopts 8 tinned round copper wires, the diameter of each tinned round copper wire is 0.12mm, and the braiding density is over 65%.
In the data cable of the present invention, the inner sheath 116 is made of a green sheath of a thermoplastic elastomer material TPE, and the outer sheath 117 is made of a green sheath of a polyurethane material PU. The inner sheath 116 has an outer diameter of 10.30mm to 10.70mm, specifically an outer diameter of 10.5mm, a nominal thickness of 0.95mm to 1.05mm, specifically a thickness of 1.0 mm. The inner sheath 117 has an outer diameter of 11.30mm to 11.70mm, in particular an outer diameter of 11.5mm, a nominal thickness of 0.45mm to 0.55mm, in particular a thickness of 0.5 mm. The double-sheath design process can make up for the deficiency and make full use of the performance of the material. The inner sheath chooses for use the processing temperature relatively lower, the proportion is little, and the TPE material of economical can not harm inside heart yearn and structure man-hour, and easily breaks away from, can not cause the use difficulty with the inner structure adhesion. The outer sheath is made of PU material, and the PU has good bonding performance and can be completely dissolved into an integral sheath with TPE due to high temperature caused by processing during processing, so that the outer sheath has good wear resistance, high mechanical strength, good elasticity, good resilience, and excellent performances of weather resistance, oil resistance, low temperature resistance and the like. On the other hand, the process design can greatly reduce the dosage of PU and is a long-time continuous material. The sheath adopts double-deck material design, and the compliance is 60A's TPE inlayer sheath material, and the TPE material proportion is little, and is soft good, as inlayer sheath material during crowded package, makes the cable compliance good, and is flexible. The PU outer sheath material of 85A is adopted, and the performance of the polyurethane material is as follows: 1) the adjustable range is wide, the adaptability is strong (2) the wear resistance is good; (3) the mechanical strength is high; (4) the bonding performance is good; (5) the elasticity is good, and the resilience is excellent; (6) the flexibility is good at low temperature; (7) the weather resistance is good; (8) the oil resistance is good; (9) the biological aging resistance and the like have a plurality of excellent performances, and are excellent choices for the sheath materials of the electric wires and the cables.
The specific specification parameters of the invention form a data BUS cable, in particular a data BUS cable of CAN BUS 1P 18AWG +1P 20AWG 120 omega. According to performance testing, the characteristic impedance of the data bus cable is 120+/-10% Ω, capacitance: 40+/-5pF/m, conductor DC resistance (18 AWG): less than or equal to 21.4 omega/km (20 ℃), the direct-current resistance of the conductor (20 AWG): less than or equal to 33.9 omega/km (20 ℃).
As another embodiment, referring to fig. 9, another embodiment is a data cable, which comprises a twisted wire, a braided layer 115, and a double-layer co-extruded sheath, which comprises an inner sheath 116 and an outer sheath 117, wherein a grounding wire 114 is arranged beside the twisted wire, the braided layer 115 covers the twisted wire and the grounding wire 114, the inner sheath 116 covers the braided layer 115, and the outer sheath 117 covers the inner sheath 116; the compound stranded wire is formed by twisting a first aluminum-clad wire and a second aluminum-clad wire and then wrapping an aluminum foil 119, the two aluminum-clad wires are respectively formed by twisting two insulated cable cores and then forming an inner layer and a single-sided aluminum foil 118 coated on the outer layer, and each insulated cable core is formed by conductors 111 and 120 and double insulating layers for coating the conductors; the double-insulation-layer solid core insulation structure is characterized in that the double-insulation layer sequentially comprises main insulation layers 112 and 121 and insulation outer skins 113 and 122 from inside to outside, the main insulation layers 112 and 121 are made of foamed polyethylene insulation layers, and the insulation outer skins 113 and 112 are made of high-density polyethylene solid core outer skins; the inner sheath 116 is made of thermoplastic elastomer (TPE) and the outer sheath 117 is made of Polyurethane (PU). In this embodiment, the composite twisted wire of the data cable may be formed by the above-mentioned preparation method of the present invention, two groups of insulated cable cores are twisted simultaneously to form two groups of twisted wires, two groups of twisted wires are wrapped with the single-sided aluminum foil 118 to form two groups of aluminum-clad wires, and two groups of aluminum-clad wires are twisted simultaneously and finished in the same process with the wrapping.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A cable stranding machine comprises a bracket, a horizontal supporting rod, at least one wire dividing plate, at least two die pressing frames, a cabling guide device, at least two traction devices and a tractor; become cable guider leading edge demountable installation have always press die device, the tractor sets up become cable guider rear, its characterized in that: two ends of the horizontal supporting rod are respectively detachably fixed on the bracket and the cabling guide device, and the wire distributing plate is detachably and fixedly arranged on the horizontal supporting rod; the at least two die pressing frames are sequentially detachably arranged on the horizontal supporting rod and can rotate around the horizontal supporting rod when not fixed, the at least two die pressing frames are arranged between the cabling guide device and the distributing plate, and included angles are formed between the two die pressing frames and are not coplanar; at least two of the tow-pack devices are respectively arranged at two sides of the horizontal supporting rod;
the winding device and the tape storage rack are arranged at the rear end of the cabling guide device, and the tape storage rack is arranged between the winding device and the traction machine;
the wire distributing plate can rotate around the horizontal supporting rod in an unfixed state; the height of the die pressing frame is adjustable;
the wire distributing plates are at least two and are respectively and sequentially arranged on the horizontal supporting rod, and included angles are formed between the wire distributing plates and are not coplanar.
2. A method of making a data cable using the stranding machine of claim 1 with the steps of:
preparing insulated cable cores, preparing the insulated cable cores to be twisted and grouping the insulated cable cores;
step (111), at least one wire distributing plate and at least two die holders are sequentially mounted on the horizontal supporting rod, and two ends of the horizontal supporting rod are respectively fixed to the upper end of the support and the front side face of the cabling guide device;
step (112), rotating at least one distributing board around the horizontal supporting rod, enabling the distributing boards to form included angles and unfairness planes when the number of the distributing boards is more than 2, and then preliminarily fixing; at least two die holders rotate around the horizontal support rod, so that an included angle is formed between the two die holders and the two die holders are not in a common plane, and then the two die holders are preliminarily fixed;
step (113), the insulated cable cores to be stranded in each group respectively pass through the threading holes in the branching plate, each pair of insulated cable cores passes through a common pressing die in the pressing die frame, all groups of insulated cable cores pass through the cabling guide device and the wrapping tape storage frame through a total pressing die on the total pressing die device, and finally the insulated cable cores pass through a tractor; or penetrating through a total pressure die on the total pressure die device to penetrate into the cabling guide device, and finally penetrating into a traction machine;
step (114), placing a plurality of dragging packages at two sides of a horizontal support rod, wherein each group of insulated cable cores is matched with one dragging package device, and an aluminum foil tape on each dragging package device is wound on a group of insulated cable cores corresponding to a group of the insulated cable cores after penetrating a pressing die on a pressing die frame to complete the winding work of all groups;
step (115), starting a stranding machine, and simultaneously performing pair twisting, dragging and compound twisting on the insulated cable core to form a compound twisted wire until the completion;
step (116), closing the stranding machine after stranding is finished, arranging the composite stranded wires, and shearing off the unsuccessful head and tail parts;
step (117), operating the cut compound stranded wires to form a data cable;
after step (113) and before step (114), the method comprises the step (113-a): finely adjusting the angles of the distributing plate and the die pressing frame respectively, and then fixing again;
step (114) may be performed after the insulated cable cores to be stranded in each group are respectively passed through the threading holes on the splitter plate in step (113), and each pair of insulated cable cores is passed through the pressing die in the common pressing die frame, and before all groups of insulated cable cores are passed through the total pressing die on the total pressing die device of the cabling guide device into the cabling guide device.
3. A method of preparing a data cable using the cable stranding machine of claim 1, having the steps of:
preparing insulated cable cores, preparing the insulated cable cores to be twisted and grouping the insulated cable cores;
step (111), at least one wire distributing plate and at least two die holders are sequentially arranged on the horizontal supporting rod, and two ends of the horizontal supporting rod are respectively fixed to the upper end of the bracket and the front side surface of the cabling guide device;
step (112), rotating at least one distributing board around the horizontal supporting rod, and when the number of the distributing boards is more than 2, enabling the distributing boards to have included angles and be not on a common plane, and then preliminarily fixing; at least two die holders rotate around the horizontal support rod, so that an included angle and an unfairness plane are formed between the two die holders, and then the two die holders are preliminarily fixed;
step (113), the insulation cable cores to be stranded in each group respectively pass through the threading holes in the branching plate, each pair of insulation cable cores passes through a common pressing die in the pressing die frame, the insulation cable cores of all groups pass through the total pressing die on the total pressing die device of the cabling guiding device to penetrate into the cabling guiding device, then pass through the wrapping device and the tape storage frame in sequence, and finally penetrate into the tractor;
step (114-a), winding the aluminum foil tapes on the wrapping device outside all the groups of insulated cable cores;
step (114), placing a plurality of dragging packages at two sides of the horizontal support rod, wherein each group of insulating cable cores is matched with one dragging package device, and an aluminum foil tape on each dragging package device penetrates through a pressing die on a pressing die frame and then a corresponding group of insulating cable cores are wound to complete the winding work of all groups;
step (115), starting a stranding machine, and simultaneously performing pair twisting, bale pulling and compound twisting on the insulated cable core until the completion; or performing pair twisting, dragging wrapping and complex twisting on the insulated cable core at the same time, and then winding the insulated cable core until the completion;
step (116), after the twisting is finished, closing the twisting machine, finishing the lapped wire, and shearing off the unsuccessful head and tail parts;
step (117), operating the sheared composite twisted wire to form a data cable;
after step (113) and before step (114), the method further comprises the step (113-a): finely adjusting the angles of the distributing plate and the die holder respectively, and then fixing again;
step (114) may be performed after the insulated cable cores to be stranded in each group are respectively passed through the threading holes on the splitter plate in step (113), and each pair of insulated cable cores is passed through the pressing die in the common pressing die frame, and before all groups of insulated cable cores are passed through the total pressing die on the total pressing die device of the cabling guide device into the cabling guide device.
4. A data cable prepared by the method of claim 2 or 3, comprising a twisted wire, a braided layer and a double-layer co-extruded sheath in sequence from inside to outside, wherein the double-layer co-extruded sheath comprises an inner sheath and an outer sheath, a grounding wire is arranged beside the twisted wire, the braided layer covers the twisted wire and the grounding wire, the inner sheath covers the braided layer, and the outer sheath covers the inner sheath; the compound stranded wire is formed by compound twisting of a first aluminum-clad wire and a second aluminum-clad wire, the two aluminum-clad wires are respectively formed by inner layers formed by pair twisting of two insulated cable cores and single-sided aluminum foils coated on the outer layers, and the insulated cable cores are formed by conductors and double insulating layers for coating the conductors; the double-insulation-layer composite insulation board is characterized in that the double-insulation layer sequentially comprises a main insulation layer and an insulation outer skin from inside to outside, the main insulation layer is made of a foamed polyethylene insulation layer, and the insulation outer skin is made of a high-density polyethylene solid outer skin; the material of inner sheath is thermoplastic elastomer material TPE, and the material of oversheath is polyurethane material PU.
5. A data cable produced by the method of claim 2 or 3, comprising a twisted wire, a braided wire, a double-layer co-extruded sheath, the double-layer co-extruded sheath comprising an inner sheath and an outer sheath, wherein a grounding wire is arranged beside the twisted wire, the braided wire covers the twisted wire and the grounding wire, the inner sheath covers the braided wire, and the outer sheath covers the inner sheath; the compound stranded wire is formed by twisting a first aluminum-clad wire and a second aluminum-clad wire and then wrapping an aluminum foil, the two aluminum-clad wires are formed by twisting two insulated cable cores to form an inner layer and a single-sided aluminum foil coated on the outer layer, and each insulated cable core is formed by a conductor and a double-insulated layer coated on the conductor; the double-insulation-layer composite insulation board is characterized in that the double-insulation layer sequentially comprises a main insulation layer and an insulation outer skin from inside to outside, the main insulation layer is made of a foamed polyethylene insulation layer, and the insulation outer skin is made of a high-density polyethylene solid outer skin; the material of inner sheath is thermoplastic elastomer material TPE, and the material of oversheath is polyurethane material PU.
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| EP2194539A2 (en) * | 2008-12-08 | 2010-06-09 | Zellner Gmbh | Data cable that can be assembled |
| CN202549483U (en) * | 2012-03-30 | 2012-11-21 | 上海熊猫线缆股份有限公司 | Pulse code modulation type symmetric radio frequency communication cable |
| CN203607160U (en) * | 2013-12-04 | 2014-05-21 | 惠州乐庭电子线缆有限公司 | Overall cabling device for dual-core paired shielding and multi-core primary shielding |
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| Publication number | Publication date |
|---|---|
| CN108806834A (en) | 2018-11-13 |
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Denomination of invention: A method for preparing data cables, cable stranding machines, and data cable stranding Granted publication date: 20220927 Pledgee: Jiaxing Bank Co.,Ltd. Xiuzhou Science and Technology Innovation Small and Micro Comprehensive Branch Pledgor: ZHEJIANG SHANGPIN CABLE TECHNOLOGY CO.,LTD. Registration number: Y2024980009352 |