Multi-core cable extrusion forming die, production equipment and production method

Abstract

The invention discloses a multi-core cable extrusion forming die, production equipment and a production method, and belongs to the technical field of plastic molding, the multi-core cable extrusion forming die comprises a melting part, a plurality of extrusion parts, a plurality of extrusion parts and a plurality of extrusion parts, the melting part is provided with a plurality of melting units, each melting unit comprises a melting tank and a spiral conveyor, and the bottom of each melting tank is provided with a discharge port; the extrusion component is provided with a plurality of extrusion structures, each extrusion structure comprises a first extrusion channel, an annular groove and a middle channel, the melting component is arranged on the upper sides of all the annular grooves in a sealing and covering mode, the multiple feeding ports communicate with the multiple annular grooves in a one-to-one correspondence mode, the melting component and the extrusion component are arranged in a relatively rotating mode, and the first extrusion channel penetrates through the extrusion component in the vertical direction. And the procedures of extrusion molding of the plurality of single-strand battery cells and twisting of the plurality of single-strand battery cells into the cable can be continuously carried out, so that the production efficiency can be improved. The production equipment comprises the multi-core cable extrusion molding die. The production method uses the production equipment to produce the multi-core cable.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molding, and particularly relates to a multi-core cable extrusion molding die, production equipment and production method. Background Art

[0002] At present, the production of multi-core cables requires first manufacturing multiple single-strand electric cores, then stranding the multiple single-strand electric cores into a multi-core cable, and then covering an outer insulating layer. Among them, the single-strand electric core is generally made by extruding an insulating material around a copper wire. During the manufacturing process, the single-strand electric core is only sent out along its axial direction and cannot be translated radially. However, stranding requires the single-strand electric core to be translated radially, resulting in each single-strand electric core needing to be wound up and placed on a stranding device, and then the stranding device unwinds the multiple single-strand electric cores and manufactures a cable with a multi-core structure; this makes it impossible to continuously perform extrusion and stranding, which is not conducive to improving production efficiency. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a multi-core cable extrusion molding die, production equipment and production method.

[0004] The multi-core cable extrusion molding die according to the first aspect embodiment of the present invention includes: A melting component, provided with a plurality of melting units. Each melting unit includes a vertically extending melting tank and a spiral conveyor disposed in the melting tank. The top of the melting tank is provided with a feed inlet, and the bottom of the melting tank is provided with a discharge outlet; An extrusion component, provided with a plurality of extrusion structures. Each extrusion structure includes a first extrusion channel, an annular groove, and an intermediate channel communicating between the first extrusion channel and the annular groove. All the annular grooves are coaxial and are all disposed on the top surface of the extrusion component. The melting component is hermetically covered on the upper side of all the annular grooves. The plurality of feed inlets are in one-to-one correspondence and communicate with the plurality of annular grooves. The melting component and the extrusion component are relatively rotatably arranged, and the axis of relative rotation is coaxial with the annular groove. The first extrusion channel is disposed outside the melting component and vertically penetrates the extrusion component; A support frame, the melting component is relatively fixedly arranged with the support frame, the extrusion component is rotatably arranged on the support frame, and the support frame is provided with a driving device for driving the extrusion component to rotate.

[0005] The multi-core cable extrusion molding die according to the first aspect embodiment of the present invention has at least the following technical effects: When in use, a wire feeding device for releasing copper wires can be arranged at the extrusion component corresponding to each first extrusion channel, so that multiple copper wires pass through multiple first extrusion channels one by one. At the same time, pellets are added to each melting tank, the heating and melting component is used to melt the pellets and each screw conveyor is started. The copper wires can form an inner insulating layer coated outside the copper wires after passing through the first extrusion channels, so as to produce single-strand electric cores. By providing a plurality of annular grooves, when the extrusion component rotates relative to the melting component, the materials in each melting tank can still flow to the corresponding first extrusion channels one by one. Then, when in use, driving the extrusion component to rotate can twist multiple single-strand electric cores into a cable, while the melting component can be kept fixed to facilitate the addition of pellets, achieving the purpose of continuous extrusion and twisting, which is beneficial to improving production efficiency.

[0006] According to some embodiments of the present invention, the melting component is cylindrical and coaxial with the annular groove, and a plurality of the melting units are arranged at intervals in sequence along the circumferential direction of the melting component.

[0007] According to some embodiments of the present invention, the extrusion component is provided with a first groove that is recessed downward, the bottom of the melting component is arranged in the first groove, and the first extrusion channel is arranged outside the first groove.

[0008] According to some embodiments of the present invention, a plurality of sealing washers are arranged between the bottom surface of the melting component and the extrusion component, and any one of the annular grooves is arranged between two of the sealing washers.

[0009] According to some embodiments of the present invention, the feed port is arranged on the outer peripheral surface of the melting component, and the rotating shaft of the screw conveyor penetrates the top wall of the melting tank; a rotating drive is arranged at the top of the melting component, and the rotating shafts of all the screw conveyors are linked and connected with the rotating drive.

[0010] The production equipment according to the second aspect embodiment of the present invention includes the above-mentioned multi-core cable extrusion molding die and a plurality of wire feeding devices. The plurality of wire feeding devices are all arranged on the extrusion component, and the plurality of wire feeding devices are arranged in one-to-one correspondence with the plurality of first extrusion channels.

[0011] The production equipment according to the second aspect embodiment of the present invention has at least the following technical effects: By providing the above-mentioned multi-core cable extrusion molding die, the processes of extrusion molding of multiple single-strand electric cores and twisting multiple single-strand electric cores into a cable can be carried out continuously, which is beneficial to improving production efficiency.

[0012] According to some embodiments of the present invention, a wire take-up device is further included. A gathering channel and a second extrusion channel are sequentially arranged between the lower part of the extrusion component and the wire take-up device. A cooling device is arranged outside the gathering channel, and a second extrusion device is arranged outside the second extrusion channel; the cooling device is used to cool the single-strand battery cores sent out by the first extrusion channel, the second extrusion device is used to extrude an outer insulating layer on the cable formed by twisting multiple single-strand battery cores, and the wire take-up device is used to take up the multi-core cable formed after extruding the outer insulating layer.

[0013] According to some embodiments of the present invention, the cooling device includes a box body wrapped outside the gathering channel and a circulation channel arranged beside the box body. Both ends of the circulation channel are respectively communicated with the box body, and a cooler and a flow-promoting fan are arranged in the circulation channel.

[0014] According to some embodiments of the present invention, the circulation channel is provided with a powder inlet, and the powder inlet is arranged on the upstream side of the flow-promoting fan.

[0015] According to the production method of the third aspect embodiment of the present invention, the above production equipment is used for the production of multi-core cables. The production method includes: Placing a plurality of copper wire coils in one-to-one correspondence on a plurality of wire pay-off devices, so that the copper wires released from each copper wire coil sequentially pass through the corresponding first extrusion channel, gathering channel, and second extrusion channel and then are connected to the wire take-up device; Putting pellet materials into a plurality of melting tanks, and heating the melting component to melt the pellet materials into molten materials; Controlling to start a plurality of screw conveyors, a plurality of wire pay-off devices, a driving device, a cooling device, a second extrusion device, and a wire take-up device, so that the molten materials in the plurality of melting tanks respectively cover a plurality of copper wires to form a plurality of single-strand battery cores, and the plurality of single-strand battery cores are cooled, and the plurality of single-strand battery cores are twisted into a cable, and the cable passes through the second extrusion device to form a multi-core cable.

[0016] According to the production method of the third aspect embodiment of the present invention, it has at least the following technical effects: By using the above production equipment, when producing multi-core cables, the extrusion molding of each single-strand battery core, the twisting of multiple single-strand battery cores into a cable, and the extrusion molding of the outer insulating layer of the multi-core cable can all be carried out continuously, which is beneficial to improving production efficiency.

[0017] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein: Figure 1It is a top view structural schematic diagram of the production equipment according to an embodiment of the present invention; Figure 2 is Figure 1 a rotating sectional view schematic diagram of; Figure 3 is Figure 2 a disassembled structural schematic diagram of; Figure 4 is Figure 3 a top view sectional view schematic diagram of the melting component in; Figure 5 is Figure 3 a top view structural schematic diagram of the melting component in; Figure 6 is Figure 3 a top view structural schematic diagram of the box body in; In the accompanying drawings: 100 - support frame; 200 - second extrusion device; 300 - box body; 310 - circulation channel; 311 - cooler; 312 - flow - promoting fan; 313 - powder inlet; 320 - connecting shaft; 321 - guide wheel; 322 - guide member; 323 - first notch; 400 - plain bearing; 500 - extrusion component; 501 - first extrusion channel; 502 - intermediate channel; 503 - annular groove; 510 - driving device; 513 - third gear; 520 - wire pay - off device; 530 - avoidance hole; 600 - sealing gasket; 700 - melting component; 710 - screw conveyor; 711 - melting tank; 720 - feed port; 730 - rotating driver; 731 - first gear; 732 - second gear; 740 - discharge port. Detailed Embodiment

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0020] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding" do not include the original number, and understandings such as "above", "below", "within" include the original number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0022] The following refers to Figures 1 to 6 Describe a multi-core cable extrusion molding die, production equipment and production method according to an embodiment of the present invention.

[0023] The multi-core cable extrusion molding die according to the first aspect embodiment of the present invention includes a melting component 700, an extrusion component 500 and a support frame 100.

[0024] The melting component 700 is provided with a plurality of melting units. The melting unit includes a vertically extending melting tank 711 and a screw conveyor 710 arranged in the melting tank 711. The axial direction of the screw conveyor 710 is vertical. The top of the melting tank 711 is provided with a feed port 720 for adding granular plastic, and the bottom of the melting tank 711 is provided with a discharge port 740; the melting component 700 can be a metal material component. The melting component 700 is provided with several electric heating rods. Starting the electric heating rods can heat the melting component 700 and then heat the plastic in the melting tank 711 to melt the granulated material into molten material. Then driving the screw conveyor 710 to rotate can pressurize the molten material and send it out from the discharge port 740.

[0025] The extrusion component 500 is provided with a plurality of extrusion structures. Refer to Figure 4, the extrusion structure includes an annular groove 503, a first extrusion channel 501, and an intermediate channel 502 communicating between the annular groove 503 and the first extrusion channel 501. All the annular grooves 503 are coaxial and are all arranged on the top surface of the extrusion member 500, and the multiple extrusion structures are not connected to each other; the molten member 700 is hermetically covered on the upper side of all the annular grooves 503, and a plurality of feed ports 720 are correspondingly connected to the plurality of annular grooves 503 one by one. The extrusion member 500 and the molten member 700 are relatively rotatably arranged, and the axis of relative rotation is coaxial with the annular groove 503. The axis of relative rotation between the molten member 700 and the extrusion member 500 is called the first axis, and the first axis is arranged vertically. The distances between the discharge ports 740 of the multiple melting units and the first axis are inconsistent. When the molten member 700 rotates relative to the extrusion member 500, the movement trajectories of the discharge ports 740 of each melting unit are all annular and do not intersect with each other, and the discharge ports 740 of each melting unit can maintain communication with the corresponding annular groove 503; The first extrusion channel 501 is arranged outside the molten member 700 and vertically penetrates the extrusion member 500. The intermediate channel 502 is arranged below all the annular grooves 503. The intermediate channel 502 extends in a direction perpendicular to the first axis. The end of the intermediate channel 502 far from the first axis is connected to the corresponding first extrusion channel 501, and the end of the intermediate channel 502 close to the first axis is connected to the corresponding annular groove 503.

[0026] Among them, the number of the melting units and the extrusion structures can be three to manufacture a three-core cable widely used in the market. By setting that the multiple extrusion structures are not connected to each other, the multiple single-strand electric cores formed by extrusion can be of different colors for distinction. For example, the three single-strand electric cores of a three-core cable are made into yellow, green, and red.

[0027] The support frame 100 is used to be fixedly arranged on the ground of the factory building. The support frame 100 is relatively fixedly arranged with the molten member 700. The molten member 700 can be provided with a connecting frame to be fixedly connected to the support frame 100, or can be fixedly connected to the cross beam or column of the factory building through the connecting frame; The extrusion member 500 is rotatably arranged on the support frame 100. The way the extrusion member 500 is rotatably connected to the support frame 100 can be to provide a plain bearing 400 at the bottom of the extrusion member 500. The support frame 100 is supported on the lower side of the plain bearing 400. Avoidance holes 530 are provided corresponding to the center of the extrusion member 500 on both the plain bearing 400 and the support frame 100. The movement track of the first extrusion channel 501 is arranged in the avoidance holes 530, so that the plain bearing 400 and the support frame 100 will not prevent the first extrusion channel 501 from delivering a single-strand battery core; the support frame 100 is provided with a driving device 510 for driving the extrusion member 500 to rotate. The driving device 510 includes a second motor, a third gear 513 and a fourth gear. The main body of the second motor is fixedly arranged on the support frame 100. The driving shaft of the second motor is provided with the third gear 513. The outer circumference of the extrusion member 500 is provided with the fourth gear. The third gear 513 is engaged with the fourth gear, so that starting the second motor can drive the extrusion member 500 to rotate.

[0028] During use, a wire pay-off device 520 for releasing copper wires can be provided corresponding to each first extrusion channel 501 of the extrusion member 500, so that multiple copper wires pass through the multiple first extrusion channels 501 one by one. At the same time, pellets are added to each melting tank 711, the heating and melting member 700 is used to melt the pellets and each screw conveyor 710 is started. The copper wires can pass through the first extrusion channels 501 to form an inner insulating layer coated on the copper wires to produce single-strand battery cores; by providing a plurality of annular grooves 503, when the extrusion member 500 rotates relative to the melting member 700, the materials in each melting tank 711 can still flow to the corresponding first extrusion channels 501 one by one. Therefore, driving the extrusion member 500 to rotate during use can twist multiple single-strand battery cores into a cable, while the melting member 700 can be kept fixed to facilitate the addition of pellets, achieving the purpose of continuous extrusion and twisting, which is beneficial to improving production efficiency.

[0029] In some embodiments of the present invention, referring to Figure 3 , the melting member 700 is cylindrical and coaxial with the annular groove 503, and a plurality of melting units are arranged at intervals in sequence along the circumferential direction of the melting member 700. In this way, the structure of the melting member 700 is reasonable and compact, which is convenient for sealing between the melting member 700 and the extrusion member 500.

[0030] In some embodiments of the present invention, the extrusion member 500 is provided with a first groove that is recessed downward, the bottom of the melting member 700 is arranged in the first groove, and the first extrusion channel 501 is arranged outside the first groove.

[0031] In this way, the groove wall of the first groove can limit the lateral movement of the melting member 700, prevent the lateral relative offset between the extrusion member 500 and the melting member 700, and the relative rotation between the extrusion member 500 and the melting member 700 is more accurate.

[0032] In some embodiments of the present invention, a plurality of sealing washers 600 are provided between the bottom surface of the melting member 700 and the extrusion member 500, and any one of the annular grooves 503 is provided between two of the sealing washers 600. Taking the number of the melting unit and the extrusion structure as three as an example, the number of the sealing washers 600 is four, and the plurality of sealing washers 600 and the plurality of annular grooves 503 are alternately sleeved at intervals in the radial direction of the first axis, so as to prevent the molten materials in different melting tanks 711 from mixing with each other.

[0033] In some embodiments of the present invention, the feed port 720 is provided on the outer peripheral surface of the melting member 700, and the rotating shaft of the screw conveyor 710 penetrates through the top wall of the melting tank 711; a rotary drive 730 is provided at the top of the melting member 700, and the rotating shafts of all the screw conveyors 710 are linked to the rotary drive 730. The rotary drive 730 includes a first motor, the main body of the first motor is fixedly connected to the melting member 700, a first gear 731 is provided on the output shaft of the first motor, a second gear 732 is provided on the rotating shaft of each screw conveyor 710, and each second gear 732 meshes with the first gear 731; setting one first motor can drive a plurality of screw conveyors 710, with a simple structure and being convenient for driving a plurality of screw conveyors 710 simultaneously; by providing the feed port 720 on the outer peripheral surface of the melting member 700, the operation of feeding pellets into the feed port 720 will not be hindered by the rotary drive 730, which is convenient for replenishing pellets into the melting tank 711.

[0034] The production equipment according to the second aspect embodiment of the present invention includes the above multi-core cable extrusion molding die and a plurality of wire feeding devices 520, and the plurality of wire feeding devices 520 are all arranged on the extrusion member 500. Referring to Figure 1 , a plurality of first extrusion channels 501 are arranged in one-to-one correspondence with the plurality of wire feeding devices 520, the wire outlet of the wire feeding device 520 is located directly above the corresponding first extrusion channel 501, and the wire feeding device 520 is used to release copper wires and make the copper wires pass through the corresponding first extrusion channel 501. The wire feeding device 520 can be a wire unwinding device for copper wires, and the wire feeding device 520 is a conventional device in the art, and its specific structure will not be elaborated herein.

[0035] By providing the above multi-core cable extrusion molding die, during use, after adding pellets into the plurality of melting tanks 711, starting the first motor, the second motor and the wire feeding device 520 can coat the inner insulating layer on each copper wire to form a single-strand electric core, and at the same time twist a plurality of single-strand electric cores; the processes of extruding and forming each single-strand electric core and twisting a plurality of single-strand electric cores into a cable can be carried out continuously, which is beneficial to improving the production efficiency.

[0036] In some embodiments of the present invention, the production equipment further includes a wire winding device. A converging channel and a second extrusion channel are sequentially arranged between the lower part of the extrusion component 500 and the wire winding device. A cooling device is arranged outside the converging channel. Refer to Figure 2 , a second extrusion device 200 is arranged outside the second extrusion channel; the cooling device is used to cool the single-strand battery cells sent out by the first extrusion channel 501, and the second extrusion device 200 is used to extrude an outer insulating layer on the cable formed by twisting multiple single-strand battery cells. The wire winding device is used to wind the multi-core cable formed after extruding the outer insulating layer. The second extrusion device 200 and the wire winding device are both conventional devices in the art, and their specific structures will not be elaborated here. By arranging the second extrusion device 200, the present invention can also perform secondary extrusion on the cable after twisting multiple single-strand battery cells into a cable to directly complete the production of the multi-core cable, which is beneficial to improving production efficiency. Among them, the setting of the cooling device can cool each single-strand battery cell before secondary extrusion to avoid adhesion between single-strand battery cells.

[0037] In some embodiments of the present invention, refer to Figure 3 , the cooling device includes a box body 300 wrapped outside the converging channel and a circulation channel 310 arranged beside the box body 300. The box body 300 is fixedly connected to the support frame 100. The box body 300 is arranged below the avoidance hole 530. The two ends of the circulation channel 310 are respectively communicated with the box body 300, that is, two connection ports are provided on the box wall of the box body 300, and there is a certain distance between the two connection ports. The two ends of the circulation channel 310 are respectively connected to the two connection ports. A flow-promoting fan 312 and a cooler 311 are arranged in the circulation channel 310. The cooler 311 can be the evaporator of a heat pump system, and the flow-promoting fan 312 can be an axial flow fan. The flow-promoting fan 312 and the cooler 311 are connected in series. In this way, the air in the box body 300 can circulate in the box body 300 and the circulation channel 310. When flowing through the circulation channel 310, the air is cooled by the cooler 311, so that the air in the box body 300 remains at a lower temperature, achieving the purpose of cooling each single-strand battery cell before secondary extrusion.

[0038] Among them, since the multiple single-strand battery cells sent out from the extrusion component 500 move along their radial direction, the box body 300 with a conventional structure needs to be provided with open openings along the entire moving path of the single-strand battery cells so that the single-strand battery cells can smoothly enter the box body 300, resulting in too large a communication area between the box body 300 and the outside world, poor heat insulation effect, and poor cooling effect on the single-strand battery cells.

[0039] In some embodiments of the present invention, the top wall of the box body 300 is set as a guiding member 322, and an outlet hole is provided on the bottom wall of the box body 300. The guiding member 322 is in the shape of a circular plate and is separated from the box body 300. Refer to Figure 6, a vertically arranged connecting shaft 320 is provided at the bottom of the extrusion component 500, and a guide member 322 is provided on the connecting shaft 320 so that the guide member 322 can rotate with the extrusion component 500, and a first notch 323 is provided on the outer peripheral edge of the guide member 322 corresponding to the bottom of each first extrusion channel 501, and the guide member 322 is an arc surface or a roller is provided on the side of the first notch 323 close to the connecting shaft 320, so that a single battery cell can pass smoothly through the first notch 323; the connecting shaft 320 is provided with a plurality of guide wheels 321 at the bottom of the guide member 322, and the plurality of guide wheels 321 are all provided at The box body 300 is provided with a plurality of first notches 323 corresponding to each other. The distance between the first notch 323 and the connecting shaft 320 is greater than the distance between the guide wheel 321 and the connecting shaft 320. The guide wheel 321 is provided above the first notch 323, so that the single battery cell sent out from the first extrusion channel 501 can pass through the first notch 323 and the guide wheel 321 in turn and then be gathered and sent out from the outlet hole; in this way, the area of the opening on the wall of the box body 300 that can connect the inside and outside of the box body 300 is smaller, which reduces the heat transfer inside and outside the box body 300, which is conducive to maintaining a lower temperature inside the box body 300.

[0040] In some embodiments of the present invention, the circulation channel 310 is provided with a powder inlet 313, which is provided on the upstream side of the flow-promoting blower 312. By providing the circulation channel 310, the interior of the housing 300 is cooled. The circulation channel 310 can be provided with a powder inlet 313, and talcum powder can be added to the housing 300 through the powder inlet 313 during operation, further preventing adhesion between single-strand battery cells. By providing the powder inlet 313 on the upstream side of the flow-promoting blower 312, talcum powder can be sucked into the circulation channel 310 by negative pressure.

[0041] The production method of the third embodiment of the present invention uses the above-mentioned production equipment to produce a multi-core cable, and the production method includes: Step S100, placing multiple copper wire coils one by one on multiple pay-off devices 520, so that the copper wire paid out from each copper wire coil passes through the corresponding first extrusion channel 501, the gathering channel, the second extrusion channel in sequence, and then is connected to the take-up device; Step S200: Put pellets into the plurality of melting tanks 711 and heat the melting part 700 to melt the pellets into molten material. In step S300, multiple screw conveyors 710, multiple pay-off devices 520, a driving device 510, a second extrusion device 200, and a take-up device are controlled to start, so that the molten material in the multiple melting tanks 711 covers the multiple copper wires one by one to form multiple single-strand battery cells, and the multiple single-strand battery cells are cooled, and the multiple single-strand battery cells are twisted into cables, and the cables are made into multi-core cables through the second extrusion device 200.

[0042] When producing a multi-core cable by using the above production equipment, the extrusion molding of each single-strand core, the stranding of multiple single-strand cores into a cable, and the extrusion molding of the outer insulating layer of the multi-core cable can all be carried out continuously, which is conducive to improving production efficiency.

[0043] The above has specifically described the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A multi-core cable extrusion molding die, characterized in that, Comprising: A melting component, provided with a plurality of melting units, each melting unit including a vertically extending melting tank and a screw conveyor disposed in the melting tank, the top of the melting tank being provided with a feed inlet, and the bottom of the melting tank being provided with a discharge outlet; An extrusion component, provided with a plurality of extrusion structures, each extrusion structure including a first extrusion channel, an annular groove, and an intermediate channel communicating between the first extrusion channel and the annular groove, all the annular grooves being coaxial and disposed on the top surface of the extrusion component, the melting component being hermetically covered on the upper side of all the annular grooves, a plurality of the feed inlets being correspondingly communicated with the plurality of annular grooves one by one, the melting component and the extrusion component being relatively rotatably arranged, and the axis of relative rotation being coaxial with the annular groove, the first extrusion channel being disposed outside the melting component and vertically penetrating the extrusion component; A support frame, the melting component and the support frame being relatively fixedly arranged, the extrusion component being rotatably arranged on the support frame, and the support frame being provided with a driving device for driving the extrusion component to rotate.

2. The multi-core cable extrusion forming die according to claim 1, characterized in that: The melting component is cylindrical and coaxial with the annular groove, and the plurality of melting units are sequentially arranged at intervals along the circumferential direction of the melting component.

3. The multi-core cable extrusion molding die according to claim 2, characterized in that: The extrusion component is provided with a downwardly concave first groove, the bottom of the melting component being disposed in the first groove, and the first extrusion channel being disposed outside the first groove.

4. The multi-core cable extrusion forming die according to claim 2, wherein: A plurality of sealing washers are provided between the bottom surface of the melting component and the extrusion component, and any one of the annular grooves is disposed between two of the sealing washers.

5. The multi-core cable extrusion forming die according to claim 2, wherein: The feed inlet is disposed on the outer peripheral surface of the melting component, and the rotating shaft of the screw conveyor penetrates the top wall of the melting tank; a rotary driver is provided at the top of the melting component, and the rotating shafts of all the screw conveyors are linked with the rotary driver.

6. A production device, characterized in that: Comprising the multi-core cable extrusion forming die according to any one of claims 1 to 5 and a plurality of wire pay-off devices, the plurality of wire pay-off devices being all disposed on the extrusion component, and the plurality of wire pay-off devices being correspondingly arranged with the plurality of first extrusion channels one by one.

7. The production equipment according to claim 6, characterized in that: Further comprising a wire take-up device, a converging channel and a second extrusion channel are sequentially provided between the lower part of the extrusion component and the wire take-up device, a cooling device is provided outside the converging channel, and a second extrusion device is provided outside the second extrusion channel; the cooling device is used for cooling the single-strand electric cores sent out from the first extrusion channel, the second extrusion device is used for extruding an outer insulating layer on the cable formed by stranding a plurality of single-strand electric cores, and the wire take-up device is used for taking up the multi-core cable formed after extruding the outer insulating layer.

8. The production equipment according to claim 7, characterized in that: The cooling device includes a box body wrapped outside the converging channel and a circulation channel disposed beside the box body, the two ends of the circulation channel are respectively communicated with the box body, and a cooler and a flow-promoting fan are provided in the circulation channel.

9. The production equipment according to claim 8, characterized in that: The circulation channel is provided with a powder inlet, and the powder inlet is disposed on the upstream side of the flow-promoting fan.

10. A production method, characterized in that: Using the production equipment according to any one of claims 7 - 9 to produce a multi-core cable, the production method comprising: Place multiple copper wire coils on multiple wire pay-off devices one by one, so that the copper wires released from each copper wire coil pass through the corresponding first extrusion channel, gathering channel, and second extrusion channel in sequence and then are connected to the wire take-up device; Put granulated materials into multiple melting tanks, and heat the melting component to melt the granulated materials into molten materials; Control to start multiple screw conveyors, multiple wire pay-off devices, driving devices, cooling devices, second extrusion devices, and wire take-up devices, so that the molten materials in multiple melting tanks cover multiple copper wires one by one to form multiple single-strand battery cores, and the multiple single-strand battery cores are cooled, and the multiple single-strand battery cores are stranded into cables, and the cables pass through the second extrusion device to form multi-core cables.

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