Two-core longitudinally-wrapped aluminum-plastic composite belt shielding flat cable and preparation device

Abstract

The utility model relates to a two-core longitudinally-wrapped aluminum-plastic composite belt shielding flat cable and a preparation device. The two-core longitudinally-wrapped aluminum-plastic composite belt shielding flat cable comprises main line conductors, insulating layers, an aluminum-plastic composite belt, a ground wire and a sheath. The insulating layer is extruded outside the main wire conductor, the two insulating wire cores are arranged in parallel, and a layer of aluminum-plastic composite belt is longitudinally wrapped outside the two wire cores; two ground wires are arranged outside the aluminum-plastic composite belt; the upper and lower two wires simultaneously extend out of the aluminum-plastic composite belt; and sheaths are arranged outside the aluminum-plastic composite belt and the ground wire. According to the two-core longitudinally-wrapped aluminum-plastic composite belt shielding flat cable and the preparation device, the two insulating wire cores are arranged in parallel, the aluminum-plastic composite belt is longitudinally wrapped outside the insulating wire cores, the two ground wires are arranged outside the aluminum-plastic composite belt in the vertical direction, the ground wires can be used for grounding and can also be used for drainage, the longitudinal wrapping effect is good, the shielding performance is uniform, and the waterproof and moisture-proof performance is good; and meanwhile, a special longitudinal wrapping device, a mold and a tool are arranged for preparation, so that the product quality is improved, the production efficiency is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a two-core longitudinally wrapped aluminum-plastic composite belt shielded flat cable and a preparation device thereof. Background Art

[0002] Shielded flat cables are low-cost, light-weight, and tough, and they are easy to use in both large and small devices. Because the structure of shielded flat cables is relatively special, when the number of cores is exactly the same, compared with round cables, shielded flat cables can reduce one cabling process compared with round cables. For cables of the same specifications, the production of flat cables requires less raw materials, which greatly reduces the production cost. Aluminum-plastic composite tape shielded cables are mainly used to shield high-frequency electromagnetic waves to prevent high-frequency electromagnetic waves from contacting network cable conductors to generate induced currents and increase crosstalk. It is mainly suitable for hospitals, factories and other places with strong electromagnetic radiation or a large number of high-voltage equipment; in addition, it is also used in areas such as governments that have high requirements for network security.

[0003] The cost of using aluminum-plastic composite tape as the shielding layer is low, the production time is short, and the shielding effect is good, so it is a shielding method often used by many manufacturers. However, the aluminum-plastic composite tape is relatively thin, and the aluminum foil is not resistant to bending and has weak tensile strength, so it is easy to break during production and use. Traditional shielded flat cables mostly use copper wire braided shielding, metal tape shielding, etc. The production process of copper wire braided shielding is relatively cumbersome, and the metal tape shielding layer is a wrapping structure, especially the aluminum-plastic composite tape, which is thin in thickness. The aluminum-plastic composite tape shielding layer after wrapping has the disadvantages of easy wrinkling, uneven shielding, and poor shielding effect. In addition, the shielding layer of the aluminum-plastic composite tape with a wrapping structure has many seams and poor waterproof and moisture-proof performance. However, many manufacturers adopt the longitudinal wrapping solution, which has abnormal problems such as aluminum-plastic composite tape flanging, folding and incomplete covering, resulting in technical difficulties such as failure of shielding effect. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable and a preparation device thereof which can improve product quality, increase production efficiency and reduce manufacturing cost.

[0005] The technical solution adopted by the utility model is:

[0006] A two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable, comprising:

[0007] Main line conductor, insulation layer, aluminum-plastic composite tape, ground wire and sheath;

[0008] The main line conductor is extruded with an insulating layer, two insulating cores are placed in parallel, and a layer of aluminum-plastic composite tape is longitudinally wrapped around the two cores;

[0009] Two ground wires are arranged outside the aluminum-plastic composite belt; the upper and lower ground wires are simultaneously inserted into the outside of the aluminum-plastic composite belt; and sheaths are arranged outside the aluminum-plastic composite belt and outside the ground wires.

[0010] A preparation device for preparing a two-core longitudinally wrapped aluminum-plastic tape shielded flat cable, comprising:

[0011] A first double pay-off stand, a second double pay-off stand, a tooling frame and an extruder head;

[0012] The first double pay-off frame is provided with a main line insulated wire core support plate for placing the main line insulated wire core;

[0013] The second double pay-off frame is provided with a ground conductor support plate for placing the ground conductor;

[0014] The tooling frame is provided with four bases, and pulleys are provided on the bases;

[0015] A horizontal guide groove is arranged at the lower part of the tooling frame, and the pulley is arranged in the horizontal guide groove;

[0016] The upper end of the tooling frame is provided with a first guide wheel frame, a second guide wheel frame, an aluminum-plastic composite belt longitudinal wrapping mold, a ground wire guide wheel frame and a shaping column in sequence;

[0017] The first guide wheel frame is provided with two three-groove guide wheels, and the second guide wheel frame is provided with a single-groove fourth ground wire guide wheel;

[0018] An aluminum-plastic composite belt reel is arranged on the side of the tooling frame; an aluminum-plastic composite belt guide wheel is arranged above the aluminum-plastic composite belt reel;

[0019] A second ground wire guide wheel and a third ground wire guide wheel are arranged at the lower part of the tooling frame.

[0020] Preferably, the aluminum-plastic composite strip longitudinal wrapping mold is a long cavity structure, with an inlet and an outlet at both ends of the cavity; the inlet cross-sectional area is larger than the outlet cross-sectional area;

[0021] The cross-sectional shape of the cavity is oblate, which is consistent with the shape of the longitudinally wrapped aluminum-plastic tape shielded flat cable after molding;

[0022] The front side of the aluminum-plastic composite strip longitudinal wrapping mold is provided with an opening communicated with the cavity.

[0023] Preferably, the aluminum-plastic composite strip longitudinal wrapping mold is arranged on a U-shaped support frame;

[0024] The aluminum-plastic composite tape longitudinal wrapping mold is detachable. Different aluminum-plastic composite tape longitudinal wrapping molds can be detached and replaced according to wire cores of different specifications.

[0025] A belt pressing device is provided at the outlet end of the aluminum-plastic composite belt longitudinal wrapping mold;

[0026] The belt pressing device comprises two pressing rollers, the ends of which are arranged on a U-shaped supporting frame;

[0027] The U-shaped support frame is provided with a guide groove; a slide block is provided in the guide groove, and the end of the pressure roller is arranged on the slide block.

[0028] Preferably, the side wall of the opening is inclined, extending from the inlet to the outlet;

[0029] The opening includes an upper end surface and a lower end surface;

[0030] The upper end face and the lower end face are both inclined downward;

[0031] The opening width of the inlet terminal is greater than the opening width of the outlet terminal.

[0032] The opening width of the incoming line is 3-5mm; the opening width of the outgoing line is 1-2mm.

[0033] The middle of the shaping column is a cavity, and three shaping molds can be arranged in sequence. The shaping molds are flat, and the inlet of the shaping mold is truncated cone-shaped and the outlet is flat;

[0034] The three shaping molds are respectively: a front shaping mold, a middle shaping mold and a rear shaping mold.

[0035] Preferably, the first ground wire guide wheel and the fifth ground wire guide wheel can adjust their positions up and down, and are mainly used to guide the two ground wires to enter the shaping column in parallel.

[0036] Three annular guide grooves are sequentially arranged on the circumferential surface of the three-groove guide wheel.

[0037] The aluminum-plastic composite tape on the aluminum-plastic composite tape reel enters into the aluminum-plastic composite tape longitudinal wrapping mold for longitudinal wrapping after being turned by the aluminum-plastic composite tape guide wheel.

[0038] A preparation device for preparing a two-core longitudinally wrapped aluminum-plastic tape shielded flat cable, comprising:

[0039] A first double pay-off stand, a second double pay-off stand, a tooling frame and an extruder head;

[0040] The first double pay-off frame is provided with a main line insulated wire core support plate for placing the main line insulated wire core;

[0041] The second double pay-off frame is provided with a ground conductor support plate for placing the ground conductor;

[0042] The tooling frame is provided with four bases, and pulleys are provided on the bases;

[0043] A horizontal guide groove is arranged at the lower part of the tooling frame, and the pulley is arranged in the horizontal guide groove;

[0044] The upper end of the tooling frame is provided with a first guide wheel frame, a second guide wheel frame, an aluminum-plastic composite belt longitudinal wrapping mold, a ground wire guide wheel frame and a shaping column in sequence;

[0045] The first guide wheel frame is provided with two three-groove guide wheels, and the second guide wheel frame is provided with a single-groove fourth ground wire guide wheel;

[0046] An aluminum-plastic composite belt reel is arranged on the side of the tooling frame; an aluminum-plastic composite belt guide wheel is arranged above the aluminum-plastic composite belt reel;

[0047] The lower part of the tooling frame is provided with a second ground wire guide wheel and a third ground wire guide wheel;

[0048] The aluminum-plastic composite strip longitudinal packaging mold is a long cavity structure, with an inlet and an outlet at both ends of the cavity; the inlet cross-sectional area is larger than the outlet cross-sectional area;

[0049] The cross-sectional shape of the cavity is oblate, which is consistent with the shape of the longitudinally wrapped aluminum-plastic tape shielded flat cable after molding;

[0050] The upper surface of the aluminum-plastic composite strip longitudinal wrapping mold is provided with an opening connected to the cavity;

[0051] The side wall of the opening is inclined, extending from the inlet to the outlet;

[0052] The opening includes a left end surface and a right end surface;

[0053] The left end face and the right end face of the opening have the same inclination direction; the left end face and the right end face of the opening are parallel to each other;

[0054] The opening width of the incoming line is larger than the opening width of the outgoing line.

[0055] The aluminum-plastic composite strip longitudinal wrapping mold is a split structure, including four right-angle support frames and support plates connected to the right-angle support frames; the cross section of the right-angle support frame is L-shaped.

[0056] Preferably, the right-angle support frame comprises an upper left support frame, an upper right support frame, a lower left support frame and a lower right support frame; the right end surface of the upper left support frame and the left end surface of the upper right support frame are connected by an upper support plate; the right end surface of the lower left support frame and the left end surface of the lower right support frame are connected by a lower support plate; the lower end surface of the upper left support frame and the upper end surface of the lower left support frame are connected by a left support plate; the lower end surface of the upper right support frame and the upper end surface of the lower right support frame are connected by a right support plate; the upper support plate comprises a left upper support plate and a right upper support plate; the left upper support plate is connected to the right end surface of the upper left support frame; the right upper support plate is connected to the upper right support The left end faces of the support frames are connected; the right end face of the left upper support plate and the left end face of the right upper support plate are provided with openings; the right end face and lower end face of the upper left support frame are provided with T-shaped grooves; the left end face and lower end face of the upper right support frame are provided with T-shaped grooves; the upper end face and right end face of the lower left support frame are provided with T-shaped grooves; the upper end face and left end face of the lower right support frame are provided with T-shaped grooves; the left end face of the left upper support plate is provided with a T-shaped protrusion; the right end face of the right upper support plate is provided with a T-shaped protrusion; the upper end face and lower end face of the left support plate are provided with T-shaped protrusions; the upper end face and lower end face of the right support plate are provided with T-shaped protrusions; the left end face and right end face of the lower support plate are provided with T-shaped protrusions; the front end cross-sectional area of ​​the right-angle support frame is larger than the rear end cross-sectional area.

[0057] The beneficial effects of the utility model compared with the prior art are as follows:

[0058] The utility model discloses a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable and a preparation device thereof, wherein two insulating cores are placed in parallel, a layer of aluminum-plastic composite tape is longitudinally wrapped outside the insulating cores, two ground wires are arranged above and below the aluminum-plastic composite tape, the ground wires can be used for grounding and also can serve as drainage, the longitudinal wrapping effect is good, the cost is low, the shielding performance is uniform, the waterproof and moisture-proof performance is good, and a special longitudinal wrapping device, mold and tooling are equipped for preparation, thereby improving product quality, increasing production efficiency and reducing manufacturing cost.

[0059] The utility model discloses a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable and a preparation device thereof. Two pressing rollers are arranged at a line outlet of an aluminum-plastic composite tape longitudinally wrapped mold. The two pressing rollers can be adjusted up and down to suitable positions and fixed to press the cable core that has been longitudinally wrapped with the aluminum-plastic composite tape. After the cable core has been longitudinally wrapped with the aluminum-plastic composite tape and pressed by the pressing rollers, it enters a forming column to prevent the aluminum-plastic composite tape from spreading, thereby improving the quality of the cable.

[0060] The utility model discloses a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable and a preparation device thereof. The aluminum-plastic composite tape longitudinally wrapped mold is a split assembly structure and can be flexibly assembled according to the cable size requirements. A set of combined molds can meet the requirements of various cables. The combined molds can be used repeatedly, which reduces the manufacturing mold cost and processing cycle and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic diagram of the structure of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable;

[0062] Figure 2 It is a structural schematic diagram of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0063] Figure 3 It is a schematic diagram of the structure of the first guide wheel frame of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0064] Figure 4 It is a schematic diagram of the structure of the second guide wheel frame of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0065] Figure 5 It is a three-dimensional structural schematic diagram of an aluminum-plastic composite tape longitudinally wrapped mold of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0066] Figure 6 It is a schematic diagram of the main structure of the first ground wire guide wheel of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0067] Figure 7 It is a side view structural diagram of the first ground wire guide wheel of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0068] Figure 8 It is a schematic diagram of the shaped column structure of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0069] Fig. 9 It is a schematic diagram of the main structure of the left side shaping mold of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0070] Fig.10 It is a side view structural schematic diagram of the left shaping die of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0071] Fig.11 It is a schematic diagram of the main structure of the middle forming mold of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0072] Fig.12 It is a schematic diagram of the side view of the structure of the middle forming die of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0073] Fig.13 It is a schematic diagram of the main structure of the right side shaping mold of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0074] Fig.14It is a side view structural schematic diagram of the right side shaping die of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0075] Fig.15 It is a structural schematic diagram of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device in which a shaping mold is arranged in a shaping column;

[0076] Fig.16 It is a schematic diagram of the structure of a three-slot guide wheel of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0077] Fig.17 It is a schematic diagram of the structure of the aluminum-plastic composite tape guide wheel of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0078] Fig.18 It is a schematic diagram of the single-slot guide wheel structure of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0079] Fig.19 It is a schematic diagram of the main structure of the extrusion die of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0080] Fig. 20 It is a schematic diagram of the side view of the extrusion die of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0081] Fig.21 It is a schematic diagram of the connection structure between the U-shaped support frame and the pressing roller of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0082] Fig. 22 It is a schematic diagram of the side view structure of a U-shaped support frame of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0083] Fig.23 It is a schematic diagram of the main structure of a U-shaped support frame of a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0084] Fig.24 It is a schematic diagram of the connection structure between the U-shaped support frame and the pressing roller of the second embodiment of the preparation device for the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable;

[0085] Fig.25 It is a schematic diagram of the three-dimensional structure of the aluminum-plastic composite tape longitudinally wrapped mold of the second embodiment of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0086] Fig.26 It is a three-dimensional structural schematic diagram of four supporting frames of the aluminum-plastic composite tape longitudinally wrapped mold of the second embodiment of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device;

[0087] Fig. 27It is a schematic diagram of the three-dimensional structure of the upper support plate of the aluminum-plastic composite tape longitudinally wrapped mold of the second embodiment of the two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable preparation device.

[0088] Description of the main components in the attached drawings:

[0089] In the figure:

[0090] 1. Ground conductor 2. Main conductor

[0091] 3. Insulation layer 4. Aluminum-plastic composite tape

[0092] 5. Sheath 6. Ground conductor

[0093] 7. First double pay-off stand 8. Second double pay-off stand

[0094] 11. Tooling frame 12. U-shaped support frame

[0095] 13. Pressing roller

[0096] 111. Three-groove guide wheel 112. Fourth ground wire guide wheel

[0097] 113. First ground wire guide wheel 114. Second ground wire guide wheel

[0098] 115. Third ground wire guide wheel 116. Aluminum-plastic composite belt reel

[0099] 117. Aluminum-plastic composite belt guide wheel 121. Forming mold

[0100] 122. Shaping cylinder 123. Extruder head

[0101] 124. fifth ground wire guide wheel 125. first guide wheel frame

[0102] 126. Second guide wheel frame 127. Extrusion die.

[0103] 21. Upper left support frame 22. Upper right support frame

[0104] 23. Lower left support frame 24. Lower right support frame

[0105] 25. Upper support plate 26. Lower support plate

[0106] 27. Left support plate 28. Right support plate

[0107] 29. T-slot 30. T-shaped protrusion DETAILED DESCRIPTION

[0108] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0109] like Figure 6The first ground wire guide wheel has the same structure as the fifth ground wire guide wheel.

[0110] like Fig.18 The fourth ground wire guide wheel 112, the second ground wire guide wheel 114, and the third ground wire guide wheel 115 have the same structure.

[0111] Attached Figure 1 It can be seen that a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable includes:

[0112] Main line conductor, insulation layer, aluminum-plastic composite tape, ground wire and sheath;

[0113] The main line conductor is extruded with an insulating layer, two insulating cores are placed in parallel, and a layer of aluminum-plastic composite tape is longitudinally wrapped around the two cores;

[0114] Two ground wires are arranged outside the aluminum-plastic composite belt; the ground wire is an aluminum conductor, which is formed by twisting annealed aluminum wires, and the upper and lower wires are simultaneously inserted into the outside of the aluminum-plastic composite belt; a sheath is arranged outside the aluminum-plastic composite belt and outside the ground wire. The thickness of the aluminum-plastic composite belt is 0.03-0.05mm; the aluminum surface of the aluminum-plastic composite belt faces outward.

[0115] The ground wire is an annealed aluminum wire conductor. During the annealing process, the aluminum wire lattice structure is rearranged, which helps to improve the conductivity and reduce the resistance. At the same time, it can improve the plasticity and facilitate twisting and bending.

[0116] The insulating sheath materials are all environmentally friendly low-smoke halogen-free flame-retardant polyolefin materials.

[0117] Attached Figure 2 It can be seen that a preparation device for preparing a two-core longitudinally wrapped aluminum-plastic tape shielded flat cable comprises: a first double pay-off frame 7, a second double pay-off frame 8, a tooling frame body 11 and an extruder head 123;

[0118] The first double pay-off frame 7 is provided with a main line insulated core support plate for placing the main line insulated core 3; the second double pay-off frame 8 is provided with a ground conductor support plate for placing the ground conductor 6;

[0119] The tooling frame is provided with four bases, and pulleys are provided on the bases;

[0120] A horizontal guide groove is arranged at the lower part of the tooling frame, and the pulley is arranged in the horizontal guide groove;

[0121] The advantage of the horizontally movable tooling frame is that it facilitates the shaping column 122 to directly enter the extruder head 123 and be close to the extrusion die 127.

[0122] The upper end of the tooling frame 11 is provided with a first guide wheel frame 125, a second guide wheel frame 126, an aluminum-plastic composite belt longitudinal wrapping mold 118, a fifth ground wire guide wheel 124 and a shaping column 122 in sequence;

[0123] The first guide wheel frame 125 is provided with two three-groove guide wheels 111, and the second guide wheel frame 126 is provided with a single-groove fourth ground wire guide wheel 112;

[0124] An aluminum-plastic composite belt reel 116 is disposed on the side of the tooling frame 11; an aluminum-plastic composite belt guide wheel 117 is disposed above the aluminum-plastic composite belt reel 116;

[0125] A second ground wire guide wheel 114 and a third ground wire guide wheel 115 are disposed at the lower portion of the tooling frame 11 .

[0126] Preferably, the aluminum-plastic composite strip longitudinal wrapping mold is a long cavity structure, with an inlet and an outlet at both ends of the cavity; the inlet cross-sectional area is larger than the outlet cross-sectional area;

[0127] The cross-sectional shape of the cavity is oblate, which is consistent with the shape of the longitudinally wrapped aluminum-plastic tape shielded flat cable after molding; an opening 19 communicating with the cavity is provided on the front side of the aluminum-plastic composite tape longitudinally wrapped mold.

[0128] Preferably, the side wall of the opening is inclined, extending from the inlet to the outlet;

[0129] The opening includes an upper end surface and a lower end surface; both the upper end surface and the lower end surface are inclined downward;

[0130] The opening width of the inlet terminal is greater than the opening width of the outlet terminal.

[0131] Preferably, the opening width of the inlet end is 3-5mm. The opening width of the outlet end is 1-2mm. The middle of the shaping column is a cavity, and three shaping molds can be arranged in sequence. The shaping molds are flat, and the inlet of the shaping mold is truncated cone-shaped and the outlet is flat.

[0132] The three shaping moulds are respectively: a front shaping mould, a middle shaping mould and a rear shaping mould; the shaping moulds are detachable and replaceable and fixed with screws.

[0133] The extruder die is a tube extrusion die, and its shape is flat.

[0134] Preferably, the first ground wire guide wheel and the fifth ground wire guide wheel can adjust their positions up and down, and are mainly used to guide the two ground wires to enter the shaping column in parallel.

[0135] Three annular guide grooves are sequentially arranged on the circumferential surface of the three-groove guide wheel.

[0136] The aluminum-plastic composite tape on the aluminum-plastic composite tape reel enters into the aluminum-plastic composite tape longitudinal wrapping mold for longitudinal wrapping after being turned by the aluminum-plastic composite tape guide wheel.

[0137] The aluminum-plastic composite tape longitudinal wrapping mold of the aluminum-plastic composite tape longitudinal wrapping device is detachable, and different aluminum-plastic composite tape longitudinal wrapping molds can be detached and replaced for wire cores of different specifications.

[0138] The belt pressing device of the aluminum-plastic composite belt longitudinal wrapping device is composed of two pressing rollers, and the two pressing rollers can be adjusted up and down to appropriate positions and fixed.

[0139] The aluminum-plastic composite strip longitudinal wrapping mold is arranged on a U-shaped support frame 12; a belt pressing device is arranged at the outlet end of the aluminum-plastic composite strip longitudinal wrapping mold; the belt pressing device includes two pressing rollers 13; the ends of the pressing rollers are arranged on a slider 14; the slider 14 is provided with a guide hole; the ends of the pressing rollers are rotatably connected with the guide hole; guide grooves 15 are arranged on both sides of the U-shaped support frame; the slider 14 is arranged in the guide groove; a rectangular fixing hole 16 is arranged on the rear end face of the U-shaped support frame; the rectangular fixing hole is connected with the guide groove; the slider is connected with the U-shaped support frame through a fixing bolt 17 and a locking nut 18. The pressing rollers include an upper pressing roller and a lower pressing roller; the positions of the upper pressing roller and the lower pressing roller are adjusted by fixing bolts and locking nuts.

[0140] A preparation device for preparing a two-core longitudinally wrapped aluminum-plastic tape shielded flat cable, comprising:

[0141] A first double pay-off stand 7, a second double pay-off stand 8, a tooling frame 11 and an extruder head 123;

[0142] The first double pay-off frame 7 is provided with a main line insulated wire core support plate for placing the main line insulated wire core 3;

[0143] The second double pay-off frame 8 is provided with a ground conductor support plate for placing the ground conductor 6;

[0144] The tooling frame is provided with four bases, and pulleys are provided on the bases;

[0145] A horizontal guide groove is arranged at the lower part of the tooling frame, and the pulley is arranged in the horizontal guide groove;

[0146] The advantage of the horizontally movable tooling frame is that it facilitates the shaping column 122 to directly enter the extruder head 123 and be close to the extrusion die 127.

[0147] The upper end of the tooling frame 11 is provided with a first guide wheel frame 125, a second guide wheel frame 126, an aluminum-plastic composite belt longitudinal wrapping mold 118, a fifth ground wire guide wheel 124 and a shaping column 122 in sequence;

[0148] The first guide wheel frame 125 is provided with two three-groove guide wheels 111, and the second guide wheel frame 126 is provided with a single-groove fourth ground wire guide wheel 112;

[0149] An aluminum-plastic composite belt reel 116 is disposed on the side of the tooling frame 11; an aluminum-plastic composite belt guide wheel 117 is disposed above the aluminum-plastic composite belt reel 116;

[0150] A second ground wire guide wheel 114 and a third ground wire guide wheel 115 are disposed at the lower portion of the tooling frame 11 .

[0151] The aluminum-plastic composite strip longitudinal wrapping mold 118 is a long cavity structure, with an inlet and an outlet at both ends of the cavity; the inlet cross-sectional area is larger than the outlet cross-sectional area;

[0152] The cross-sectional shape of the cavity is oblate, which is consistent with the shape of the longitudinally wrapped aluminum-plastic tape shielded flat cable after molding; the upper surface of the aluminum-plastic composite tape longitudinally wrapped mold is provided with an opening connected to the cavity;

[0153] The side wall of the opening is inclined, extending from the inlet to the outlet;

[0154] The opening includes a left end surface and a right end surface;

[0155] The left end face and the right end face of the opening have the same inclination direction; the left end face and the right end face of the opening are parallel to each other;

[0156] The opening width of the incoming line is larger than the opening width of the outgoing line.

[0157] The aluminum-plastic composite strip longitudinal wrapping mold is a split structure, including four right-angle support frames and support plates connected to the right-angle support frames; the cross section of the right-angle support frame is L-shaped.

[0158] Preferably, the right-angle support frame comprises an upper left support frame, an upper right support frame, a lower left support frame and a lower right support frame; the right end surface of the upper left support frame and the left end surface of the upper right support frame are connected by an upper support plate; the right end surface of the lower left support frame and the left end surface of the lower right support frame are connected by a lower support plate; the lower end surface of the upper left support frame and the upper end surface of the lower left support frame are connected by a left support plate; the lower end surface of the upper right support frame and the upper end surface of the lower right support frame are connected by a right support plate; the upper support plate comprises a left upper support plate and a right upper support plate; the left upper support plate is connected to the right end surface of the upper left support frame; the right upper support plate is connected to the left end surface of the upper right support frame; the left upper The right end face of the lower support plate and the left end face of the right upper support plate are provided with openings; (the incoming line end is the front end, the outgoing line end is the rear end, and the front end opening is larger than the rear end opening;) the right end face and the lower end face of the upper left support frame are provided with T-shaped grooves; the left end face and the lower end face of the upper right support frame are provided with T-shaped grooves; the upper end face and the right end face of the lower left support frame are provided with T-shaped grooves; the upper end face and the left end face of the lower right support frame are provided with T-shaped grooves; the left end face of the left upper support plate is provided with a T-shaped protrusion; the right end face of the right upper support plate is provided with a T-shaped protrusion; the upper end face and the lower end face of the left support plate are provided with T-shaped protrusions; the upper end face and the lower end face of the right support plate are provided with T-shaped protrusions; the upper end face and the lower end face of the right support plate are provided with T-shaped protrusions; the left end face and the right end face of the lower support plate are provided with T-shaped protrusions; the front end cross-sectional area of ​​the right-angle support frame is larger than the rear end cross-sectional area.

[0159] A method for preparing a two-core longitudinally wrapped aluminum-plastic tape shielded flat cable, the method comprising: placing two main line insulated cores on a first double pay-off frame; placing two ground conductors on a second double pay-off frame; adjusting the tension of the two main line insulated cores and the two ground conductors to be consistent; one of the ground conductors passes through a second ground guide wheel 114 and a third ground guide wheel 115 at the lower end of a tooling frame, and a first ground guide wheel 113 into a cable core shaping column;

[0160] Another ground wire sequentially enters the groove in the middle of the three-groove guide wheel 111, the fourth ground wire guide wheel 112, and the first ground wire guide wheel 113 and enters the cable core shaping column;

[0161] The insulated wire cores of the two main lines respectively pass through the grooves on both sides of the three-groove guide wheel 111 on the tooling frame, and enter the cable core shaping column after being longitudinally wrapped by the aluminum-plastic composite tape longitudinal wrapping mold;

[0162] The two ground wires are located in the gaps on the upper and lower sides of the insulated wire cores of the two main wires after the longitudinal wrapping is completed to form a cable core, and enter the shaped column together;

[0163] The shaping column of the overall tooling frame is pushed into the extruder head, and the shaped cable core enters the flat extrusion die for low-smoke halogen-free flame-retardant polyolefin sheath extrusion, completing the preparation of the two-core longitudinally wrapped aluminum-plastic tape shielded flat cable.

[0164] For specific tooling frame, see Figure 2 The tooling frame is supported by four bases, and the bases are provided with tooling frame pulleys, so that the entire tooling frame is a slidable and movable tooling frame. The aluminum-plastic composite tape reel and the aluminum-plastic composite tape guide wheel are arranged on the side thereof. The aluminum-plastic composite tape enters the longitudinally wrapped aluminum-plastic composite tape mold through the guide wheel to complete the longitudinal wrapping of two parallel insulated wire cores. The two insulated wire cores enter the longitudinally wrapped aluminum-plastic composite tape mold through the three-slot guide wheel. The ground wire conductor passes through the middle groove of the three-slot guide wheel, the single-slot guide wheel and the ground wire guide wheel and the insulated wire core completed by the longitudinally wrapped aluminum-plastic composite tape to form a cable core, and enter the shaping column together. Three shaping molds are arranged in the shaping column in sequence to ensure that the aluminum-plastic composite tape completed by the longitudinal wrapping does not wrinkle or spread, and then enters the extruder to extrude the sheath.

[0165] The utility model discloses a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable and a preparation method thereof, wherein two insulating cores are placed in parallel, a layer of aluminum-plastic composite tape is longitudinally wrapped outside the insulating cores, two ground wires are arranged above and below the aluminum-plastic composite tape, the ground wires can be used for grounding and also can serve as drainage, the longitudinal wrapping effect is good, the cost is low, the shielding performance is uniform, the waterproof and moisture-proof performance is good, and the cable is prepared with a special longitudinal wrapping device, mold and tooling, thereby improving product quality, increasing production efficiency and reducing manufacturing cost.

[0166] The utility model discloses a two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable and a preparation device thereof. The aluminum-plastic composite tape longitudinally wrapped mold is a split assembly structure and can be flexibly assembled according to the cable size requirements. A set of combined molds can meet the requirements of various cables. The combined molds can be used repeatedly, which reduces the manufacturing mold cost and processing cycle and improves production efficiency.

[0167] The above is only a preferred embodiment of the utility model, and does not limit the structure of the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model are within the scope of the technical solution of the utility model.

Claims

1. A two-core longitudinally wrapped aluminum-plastic composite tape shielded flat cable, characterized in that: include: Main line conductor (1), insulating layer (2), aluminum-plastic composite tape (3), ground wire (4) and sheath (5); The main line conductor (1) is provided with an externally extruded insulating layer (2), two insulating wire cores are placed in parallel, and a layer of aluminum-plastic composite tape (3) is longitudinally wrapped outside the two wire cores; Two ground wires (4) are arranged outside the aluminum-plastic composite belt; the upper and lower ground wires are simultaneously inserted into the outside of the aluminum-plastic composite belt; and a protective sheath (5) is arranged outside the aluminum-plastic composite belt and outside the ground wires.

2. A preparation device for preparing the two-core longitudinally wrapped aluminum-plastic tape shielded flat cable according to claim 1, characterized in that: include: A first double pay-off stand (7), a second double pay-off stand (8), a tooling frame (11) and an extruder head (123); The first double pay-off frame (7) is provided with a main line insulated wire core support plate for placing the main line insulated wire core; The second double pay-off frame (8) is provided with a ground conductor support plate for placing the ground conductor (6); The tooling frame is provided with four bases, and pulleys are provided on the bases; A horizontal guide groove is arranged at the lower part of the tooling frame, and the pulley is arranged in the horizontal guide groove; The upper end of the tooling frame (11) is provided with a first guide wheel frame (125), a second guide wheel frame (126), an aluminum-plastic composite belt longitudinal wrapping mold (118), a fifth ground wire guide wheel (124) and a shaping column (122) in sequence; The first guide wheel frame (125) is provided with two three-groove guide wheels (111), and the second guide wheel frame (126) is provided with a single-groove fourth ground wire guide wheel (112); An aluminum-plastic composite belt reel (116) is arranged on the side of the tooling frame (11); an aluminum-plastic composite belt guide wheel (117) is arranged above the aluminum-plastic composite belt reel (116); A second ground wire guide wheel (114) and a third ground wire guide wheel (115) are arranged at the lower part of the tooling frame (11).

3. The device for preparing a two-core longitudinally-wrapped aluminum-plastic-tape shielded flat cable according to claim 2, characterized in that: The aluminum-plastic composite strip longitudinal packaging mold is a long cavity structure, with an inlet and an outlet at both ends of the cavity; the inlet cross-sectional area is larger than the outlet cross-sectional area; The cross-sectional shape of the cavity is oblate, which is consistent with the shape of the longitudinally wrapped aluminum-plastic tape shielded flat cable after molding; The front side of the aluminum-plastic composite strip longitudinal wrapping mold is provided with an opening (19) communicating with the cavity; The side wall of the opening is inclined, extending from the inlet to the outlet; The opening includes an upper end surface and a lower end surface; The upper end face and the lower end face are both inclined downward; The opening width of the inlet terminal is greater than the opening width of the outlet terminal.

4. The device for preparing a two-core longitudinally-wrapped aluminum-plastic-tape shielded flat cable according to claim 3, characterized in that: The aluminum-plastic composite strip longitudinal wrapping mold is arranged on a U-shaped support frame (12); A belt pressing device is provided at the outlet end of the aluminum-plastic composite belt longitudinal wrapping mold; The belt pressing device comprises two pressing rollers (13); The end of the pressure roller is arranged on the slider (14); the slider (14) is provided with a guide hole; the end of the pressure roller is rotatably connected to the guide hole; Guide grooves (15) are respectively arranged on both sides of the U-shaped support frame; the slide block (14) is arranged in the guide groove; A rectangular fixing hole (16) is provided on the rear end surface of the U-shaped support frame; the rectangular fixing hole is connected to the guide groove; The slide block is connected to the U-shaped support frame via a fixing bolt (17) and a locking nut (18).

5. The device for preparing a two-core longitudinally-wrapped aluminum-plastic-tape shielded flat cable according to claim 4, characterized in that: The opening width of the incoming line is: 3-5mm; The opening width of the outlet is: 1-2mm; The middle of the shaping column is a cavity, and three shaping molds can be arranged in sequence. The shaping molds are flat, and the inlet of the shaping mold is truncated cone-shaped and the outlet is flat; The three shaping molds are respectively: a front shaping mold, a middle shaping mold and a rear shaping mold.

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