Photovoltaic cable striping device
By designing a photovoltaic cable injection molding device, the production of injection molding and ordinary photovoltaic cables can be quickly switched on the same production line, solving the problem of high production costs in existing technologies and reducing the production cost of photovoltaic cables.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-19
- Publication Date
- 2026-06-16
AI Technical Summary
Existing photovoltaic cable production lines require two separate lines to produce photovoltaic cables with the same color outer sheath and those with injection molding strips, resulting in high production costs.
Design a photovoltaic cable injection molding device, including an injection molding extruder, an outer sheath co-extrusion die head and a preheating extruder. By controlling the injection molding feed hole and guide hole through the plug, the photovoltaic cable production line can quickly switch between injection molding and ordinary photovoltaic cables.
This reduces the production cost of photovoltaic cables, enables rapid switching between the production of injection-molded and ordinary photovoltaic cables on the same production line, and improves production efficiency.
Smart Images
Figure CN122210893A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of photovoltaic cable production, specifically to a photovoltaic cable injection device. Background Technology
[0002] During the manufacturing of photovoltaic cables, a matching outer sheath is produced using a photovoltaic string extrusion machine. However, in actual production, some photovoltaic cables require colored injection molding strips for their outer sheaths. Existing technologies generally use multi-channel co-extrusion heads or colored thread inlay. The existing multi-channel co-extrusion heads have independent, small auxiliary channels inside the main extruder head specifically designed for conveying injection molding strip material. However, the generation of this material requires a separate injection molding machine, followed by an independent co-extrusion head matched to that machine. In actual production, the existing co-extrusion heads used for producing matching outer sheaths cannot be used. This necessitates setting up two separate photovoltaic cable production lines for both injection molding photovoltaic cables and matching outer sheath photovoltaic cables, resulting in high production line costs for photovoltaic cables.
[0003] Since both color-coated outer sheath photovoltaic cables and strip-insulated photovoltaic cables need to be produced in industrial production, there is an urgent need to develop a production line that can adapt to both color-coated outer sheath and strip-insulated photovoltaic cables. Among these, there is an urgent need to develop a photovoltaic cable strip-insulating device that can quickly switch between strip-insulated and non-strip-insulated configurations. Summary of the Invention
[0004] To address the aforementioned issues, this invention provides a photovoltaic cable injection molding device that enables existing production lines to quickly switch between injection-molded photovoltaic cables and ordinary photovoltaic cables, thereby ensuring a reduction in the production cost of photovoltaic cables.
[0005] A photovoltaic cable injection molding device, characterized in that it comprises: Injection molding machine; The outer sheath co-extrusion die head includes an inner die and an outer die. The inner die forms a core wire guiding passage inside. The outer die is sleeved around the inner die, and the outer die is provided with an injection extrusion cavity at the core wire outlet position relative to the inner die. The outer die is provided with an injection plastic inlet, and the injection plastic inlet is connected to the injection extrusion cavity through a passage. And a preheated extruder; The outlet of the preheating extruder is connected to the injection molding inlet. The outer sheath co-extrusion die head has a strip feeding hole corresponding to the inner end of the injection molding extrusion cavity. The outer periphery of the outer mold outside the strip feeding hole is connected to the outlet die head of the strip extruder through a mounting bracket. The strip outlet of the strip extruder feeds the strip into the strip feeding hole. The inner mold has a strip guide hole facing the injection molding extrusion cavity. The strip enters the injection molding extrusion cavity along the strip feeding hole and the strip guide hole and extends straight backward to the rear of the outer sheath co-extrusion die head.
[0006] Its further features are: When the photovoltaic cable production line only produces ordinary photovoltaic cables, the injection bar inlet hole is blocked by the first plug and the injection bar guide hole is blocked by the second plug, so that only the injection plastic can pass into the injection extrusion cavity; The injection bar inlet hole is connected in the depth direction to the non-closing small-diameter cavity of the core wire guide passage. The injection bar guide hole is a straight hole corresponding to the inner mold and arranged along a straight line. The longitudinal section of the straight hole is set to conform to the overall cross-sectional shape of the injection bar. The injection bar guide hole is connected to the inclined transition section of the injection extrusion cavity and the core wire guide passage respectively. The inlet of the injection bar guide hole is set to the rear end of the injection bar inlet hole to ensure normal and reliable guidance. The thickness of the injection strip is less than the thickness of the outer sheath. The injection strip moves backward along the injection extrusion cavity in a straight line shape. The bottom and core wire of the injection strip are directly filled with injection molding material, so that the injection strip can be reliably formed. The outer surface of the injection strip is flush with the inner wall of the discharge hole of the outer mold. During extrusion molding, the outer surface of the injection strip is exposed to the injection plastic and forms a smooth annular surface with the outer peripheral injection plastic. The injection bar inlet hole is a threaded hole. The injection bar inlet hole is equipped with an injection bar guide and a first plug. The first plug blocks the injection bar inlet hole during the production of ordinary photovoltaic cables. The injection bar guide guides the injection bar into the inlet of the injection bar guide hole during the production of injection bar photovoltaic cables. The injection bar inlet hole is a vertically arranged hole. The injection bar guide includes a vertical inlet and a horizontal outlet. The injection bar guide includes a turning cavity. The inner wall of the turning cavity is a smooth arc transition, which ensures that after the injection bar turns, it flows horizontally from the horizontal outlet to the inlet of the injection bar guide hole. The inner mold has a tapered guide sleeve at its rear end, which includes a core wire conical guide centering cavity. The outer mold has an injection guide block at its rear end. The inner circumference of the injection guide block and the outer protruding end of the tapered guide sleeve form an injection extrusion cavity. The front protruding ring at the rear end of the tapered guide sleeve forms the core wire lead-out portion. The bottom of the injection strip guide is not higher than the corresponding position of the inner wall of the front protruding ring at the rear end, which allows the core wire to emerge smoothly without rubbing or touching the injection strip guide, thus ensuring the quality of the photovoltaic cable. The mounting bracket includes a pivot connector that allows for adjustment of the injection molding extruder's outlet angle and the lateral convex position of the extruder relative to the entire production line, enabling the entire production line to be adapted to different installation locations. By adopting this invention, an additional injection molding machine is added to the photovoltaic cable production line that previously did not have an injection molding mechanism. An injection molding feed hole and an injection molding guide hole are provided on the outer sheath co-extrusion head. When the photovoltaic cable production line only produces ordinary photovoltaic cables, the injection molding feed hole is blocked by a first plug and the injection molding guide hole is blocked by a second plug, so that only the injection plastic can pass through the injection extrusion cavity. When it is necessary to produce photovoltaic cables with injection molding, the injection molding line enters the injection molding machine along the injection molding feed hole and the injection molding guide hole, extends backward, and is attached by the injection plastic to form an outer sheath with injection molding. This allows the existing production line to quickly switch between injection molding photovoltaic cables and ordinary photovoltaic cables, ensuring that the production cost of photovoltaic cables is reduced. Attached Figure Description
[0007] Figure 1 This is a top view of the present invention; Figure 2 This is a top sectional view of the co-extrusion die head for the outer sheath applicable to this invention; Figure 3 This is a partial front sectional view of the co-extrusion die head for the outer sheath applicable to the present invention; The names corresponding to the serial numbers in the diagram are as follows: 10. Injection strip extruder, 11. Outlet die head, 20. Outer sheath co-extrusion die head, 21. Inner mold, 21. Closing guide sleeve, 211. Rear end front protruding ring, 2111. Core wire conical guide centering cavity, 212. Outer mold, 22. Injection guide block, 221. Core wire guide passage, 23. Closing transition cavity, 231. Injection extrusion cavity, 24. Injection plastic inlet, 25. Injection strip feed hole, 26. Injection strip guide hole, 27. Outlet inner hole ring wall, 28. Passage, 29. Preheating extruder, 30. Injection strip, 40. Injection strip guide, 50. Vertical feed port, 51. Horizontal discharge port, 52. Turning cavity, 53. Mounting bracket, 60. Pivot connector, 61. First connecting plate, 62. Second connecting plate, 63. Detailed Implementation
[0008] A photovoltaic cable injection molding device, see Figures 1-3 It includes: 10 injection molding extruders; The outer sheath co-extrusion die head 20 includes an inner die 21 and an outer die 22. The inner die 21 forms a core wire guiding passage 23 inside. The outer die 22 is sleeved on the periphery of the inner die 21. The outer die 22 is provided with an injection extrusion cavity 24 at the core wire outlet position of the inner die 21. The outer die 22 is provided with an injection plastic inlet 25, which is connected to the injection extrusion cavity 24 through a passage 29. And a preheated extruder 30; The outlet of the preheated extruder 30 is connected to the injection inlet 25. The outer sheath co-extrusion head 20 is provided with a strip feed hole 26 corresponding to the inner end of the injection extrusion cavity 24. The outer periphery of the outer mold 22 outside the strip feed hole 26 is connected to the outlet head 11 of the strip extruder 10 through the mounting bracket 60. The strip outlet of the strip extruder 10 feeds the strip 40 into the strip feed hole 26. The inner mold 21 is provided with a strip guide hole 27 facing the injection extrusion cavity 24. The strip 40 enters the injection extrusion cavity 24 along the strip feed hole 26 and the strip guide hole 27 and extends straight backward to the rear of the outer sheath co-extrusion head 20.
[0009] In specific implementation, it also includes a first plug and a second plug; when the photovoltaic cable production line only produces ordinary photovoltaic cables, the first plug blocks the injection bar inlet hole 26, and the second plug blocks the injection bar guide hole 27, so that only the injection plastic can pass through the injection extrusion cavity 24.
[0010] In practice, the injection bar inlet hole 26 is connected in the depth direction to the closing transition cavity 231 of the core wire guide passage 23. The injection bar guide hole 27 is a straight hole corresponding to the inner mold 21 and arranged along a straight line. The longitudinal section of the straight hole is set to mimic the overall cross-sectional shape of the injection bar 40. The injection bar guide hole 27 is connected to the inclined transition section of the injection extrusion cavity 24 and the core wire guide passage 23 respectively. The inlet of the injection bar guide hole 27 is set to correspond to the rear end of the injection bar inlet hole 26 to ensure normal and reliable guidance.
[0011] In practice, the thickness of the injection strip 40 is less than the thickness of the outer sheath. The injection strip 40 moves backward along the injection extrusion cavity 24 in a straight line shape. The bottom and core wire of the injection strip 40 are directly filled with injection plastic, so that the injection strip 40 can be reliably formed.
[0012] In practice, the outer surface of the injection strip 40 is flush with the inner wall 28 of the discharge hole of the outer mold 22. During extrusion molding, the outer surface of the injection strip 40 is exposed to the injection plastic and forms a smooth annular surface with the outer circumference of the injection plastic.
[0013] In a specific embodiment, the injection bar inlet hole 26 is a threaded hole. The injection bar inlet hole 26 is equipped with an injection bar guide 50 and a first plug. The first plug blocks the injection bar inlet hole 26 during the production of ordinary photovoltaic cables. The injection bar guide 50 guides the injection bar 40 into the inlet of the injection bar guide hole 26 during the production of injection bar photovoltaic cables. The injection bar inlet hole 26 is a vertically arranged hole. The injection bar guide 50 includes a vertical inlet 51 and a horizontal outlet 52. The injection bar guide 50 includes a turning cavity 53. The inner wall of the turning cavity 53 is a smooth arc transition, which ensures that after the injection bar 40 turns, it flows horizontally from the horizontal outlet 52 to the inlet of the injection bar guide hole 27.
[0014] In a specific embodiment, the rear end of the inner mold 21 is provided with a closing guide sleeve 211, which includes a core wire conical guide centering cavity 212. The rear end of the outer mold 22 is provided with an injection guide block 221. The inner circumference of the injection guide block 221 and the outer protruding end of the closing guide sleeve 211 form an injection extrusion cavity 24. The rear end front protruding ring 2111 of the closing guide sleeve 211 forms the core wire lead-out portion. The bottom of the injection strip guide 50 is not higher than the corresponding position of the inner wall of the rear end front protruding ring 2111, which allows the core wire to emerge smoothly without rubbing against or touching the injection strip guide 50, thus ensuring the quality of the photovoltaic cable.
[0015] In a specific embodiment, the mounting bracket 60 includes a pivot connector 61. The first connecting plate 62 and the second connecting plate 63 are connected by the pivot connector 61. The first connecting plate 62 is fixedly connected to the corresponding position of the outer mold 22, and the second connecting plate 63 is fixedly connected to the outlet head 11 of the injection molding machine 10. The injection molding machine 10 outputs the injection molding strip after molding, and the color of the injection molding strip can be adjusted as needed. The pivot connector 61 makes the outlet angle of the injection molding strip 40 of the injection molding machine 10 adjustable, and at the same time makes the convex position of the injection molding machine 10 relative to the entire production line adjustable, so that the entire production line can be adapted to the site installation. Its working principle is as follows: An injection strip extruder is added to the photovoltaic cable production line that did not originally have an injection strip mechanism. An injection strip inlet hole and an injection strip guide hole are set on the outer sheath co-extrusion die head. When the photovoltaic cable production line only produces ordinary photovoltaic cables, the injection strip inlet hole is blocked by the first plug and the injection strip guide hole is blocked by the second plug, so that only the injection plastic can pass through the injection extrusion cavity. When it is necessary to produce photovoltaic cables with injection strips, the injection strip enters the injection strip extruder along the injection strip inlet hole and the injection strip guide hole, extends backward and is attached by the injection plastic to form an outer sheath with injection strips. This allows the existing production line to quickly switch between injection strip photovoltaic cables and ordinary photovoltaic cables, ensuring that the production cost of photovoltaic cables is reduced.
[0016] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0017] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A photovoltaic cable injection molding device, characterized in that, It includes: Injection molding machine; The outer sheath co-extrusion die head includes an inner die and an outer die. The inner die forms a core wire guiding passage inside. The outer die is sleeved around the inner die, and the outer die is provided with an injection extrusion cavity at the core wire outlet position relative to the inner die. The outer die is provided with an injection plastic inlet, and the injection plastic inlet is connected to the injection extrusion cavity through a passage. And a preheated extruder; The outlet of the preheating extruder is connected to the injection molding inlet. The outer sheath co-extrusion die head has a strip feeding hole corresponding to the inner end of the injection molding extrusion cavity. The outer periphery of the outer mold outside the strip feeding hole is connected to the outlet die head of the strip extruder through a mounting bracket. The strip outlet of the strip extruder feeds the strip into the strip feeding hole. The inner mold has a strip guide hole facing the injection molding extrusion cavity. The strip enters the injection molding extrusion cavity along the strip feeding hole and the strip guide hole and extends straight backward to the rear of the outer sheath co-extrusion die head.
2. The photovoltaic cable injection device according to claim 1, characterized in that: When the photovoltaic cable production line only produces ordinary photovoltaic cables, the injection bar inlet hole is blocked by the first plug and the injection bar guide hole is blocked by the second plug, so that only the injection plastic can pass into the injection extrusion cavity.
3. The photovoltaic cable injection device according to claim 1, characterized in that: The injection bar feed hole is connected in the depth direction to the non-closing small-diameter cavity of the core wire guide passage. The injection bar guide hole is a straight hole corresponding to the inner mold and arranged along a straight line. The longitudinal section of the straight hole is set to mimic the overall cross-sectional shape of the injection bar. The injection bar guide hole is connected to the inclined transition section of the injection extrusion cavity and the core wire guide passage respectively. The inlet of the injection bar guide hole is set to the rear end of the injection bar feed hole.
4. The photovoltaic cable injection device according to claim 1, characterized in that: The thickness of the injection strip is less than the thickness of the outer sheath. The injection strip moves backward along the injection extrusion cavity in a straight line shape. The bottom and core wire of the injection strip are directly filled with injection molding material.
5. A photovoltaic cable injection device according to claim 1, characterized in that: The outer surface of the injection strip is flush with the inner wall of the discharge hole of the outer mold. During extrusion molding, the outer surface of the injection strip is exposed to the injection plastic and forms a smooth annular surface with the outer periphery of the injection plastic.
6. The photovoltaic cable injection device according to claim 1, characterized in that: The injection bar inlet hole is a threaded hole. The injection bar inlet hole is equipped with an injection bar guide and a first plug. The first plug blocks the injection bar inlet hole during ordinary photovoltaic cable production. The injection bar guide guides the injection bar into the inlet of the injection bar guide hole during injection bar photovoltaic cable production.
7. A photovoltaic cable injection device according to claim 6, characterized in that: The injection bar inlet hole is a vertically arranged hole.
8. A photovoltaic cable injection device according to claim 7, characterized in that: The injection strip guide includes a vertical inlet and a horizontal outlet. The injection strip guide includes a turning cavity with a smooth arc transition on the inner wall, which ensures that the injection strip, after turning, flows horizontally from the horizontal outlet to the inlet of the injection strip guide hole.
9. A photovoltaic cable injection device according to claim 1, characterized in that: The inner mold has a tapered guide sleeve at its rear end, which includes a core wire conical guide centering cavity. The outer mold has an injection guide block at its rear end. The inner circumference of the injection guide block and the outer protruding end of the tapered guide sleeve form an injection extrusion cavity. The front protruding ring at the rear end of the tapered guide sleeve forms a core wire lead-out portion. The bottom of the injection strip guide is not higher than the corresponding position of the inner wall of the front protruding ring at the rear end.
10. A photovoltaic cable injection device according to claim 1, characterized in that: The mounting bracket includes a pivot connector that allows the exit angle of the injection molding machine's injection molding strip to be adjustable.