A high-precision concentricity extrusion device for wires and cables

Abstract

The present invention discloses a high-precision concentricity extrusion device for electric wires and cables, comprising a supporting base, a material guide trough is provided on the inner wall of a barrel, the inner wall of the material guide trough is rotatably connected to a screw dragon, the inner walls of two annular limiting slide grooves are rotatably connected to limiting rings, fixed frames are fixed on both sides of the inner walls of the two limiting rings, the inner walls of the four fixing frames are rotatably connected to connecting frames, the inner walls of one end of the four connecting frames are rotatably connected to traction guide wheels, and springs are fixed on one side of the four connecting frames; the present invention provides mutually connected wire core grooves on the barrel and the screw dragon, and at the same time, the outer skin raw material is transferred through the screw dragon in the material guide trough to realize unidirectional transfer, during this process, the wire core passes through the limiting ring, and a spring is provided between the fixing frame and the connecting frame to automatically and elastically adjust the distance of the traction guide wheel according to the diameter size of the wire core, so as to realize automatic adaptation to wire cores of different diameters for centered transfer, prevent the wire core from sagging during transfer, and improve the processing quality of the cable.

Description

Technical Field

[0001] The invention relates to the technical field of wire and cable extrusion molding, in particular to a high-precision concentricity extrusion device for wire and cable. Background Art

[0002] Extrusion is a thermoplastic forming process that involves heating, melting, pressurizing, and cooling to form a final shape. Cable insulation sheaths and automobile inner tubes are also manufactured using this process, and are widely used in the industrial production of plastic products and rubber components. This process uses an extruder to continuously process thermoplastic materials into specific shapes, such as pipes and sheets. Typical applications include the manufacture of cable insulation sheaths and automobile inner tubes. Extrusion is most frequently used in the production of wires and cables to wrap the insulation sheath around the core. To improve the quality of the insulation wrapping, high-precision concentricity extrusion equipment is often used in cable production.

[0003] However, the existing high-precision concentricity extrusion device for wires and cables has the following disadvantages during use:

[0004] 1. During the use of the existing concentricity extrusion device, the core and the outer insulation are extruded in the same direction. During the same-direction transmission process, the core needs to be continuously pulled by the traction equipment at the end to be continuously extracted from the extruder. The copper core itself has a certain weight. During the continuous traction process, the section inside the extruder will sag, which will cause a large eccentric distance when the copper core and the molten insulation outer layer are wrapped and extruded, thereby affecting the production quality of wires and cables;

[0005] 2. In the process of extruding wires and cables, the existing extrusion mechanism generally adds the crushed outer sheath plastic raw materials directly into the equipment for melting. However, during the processing of the raw materials, some raw materials are not completely crushed and are put into use in the form of large particles. The speed at which such raw materials are melted in the barrel is slow. Even when the outer sheath is wrapped, some raw materials are not completely melted due to their large volume, making the cable outer sheath surface rough. At the same time, large-volume raw materials are prone to blocking the feed area, causing the equipment to be unusable, which not only wastes resources but also reduces the cable processing efficiency of the device.

[0006] 3. When ordinary extrusion equipment is used to process cables, the cables are extruded and then passed through an external cooling pool to cool and shape their outer skin. During the extrusion molding process to the cooling pool, if the cable is touched, it may cause concave defects on the surface of the cable outer skin. Ordinary extrusion devices themselves do not have a pre-shaping function, which increases the risk of such damage and reduces the protectiveness of the device. Summary of the Invention

[0007] The object of the present invention is to provide a high-precision concentricity extrusion device for wires and cables to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention proposes a high-precision concentricity extrusion device for wires and cables, comprising a support base, wherein a concentric extrusion mechanism, a feeding assembly and a circulating cooling and shaping mechanism are arranged on the upper end of the support base.

[0009] The concentric extrusion mechanism includes a barrel fixedly mounted on the top of the supporting base, the inner wall of the barrel is provided with a material guide groove, the inner wall of the material guide groove is rotatably connected to an auger, the inner wall of the auger and the inner wall of one end of the barrel are provided with a wire core groove, and the inner walls of the two wire core grooves are connected to each other, the inner walls of one end of the two wire core grooves are provided with an annular limiting slide groove, the inner walls of the two annular limiting slide grooves are rotatably connected to the limiting ring, and fixed frames are fixed on both sides of the inner walls of the two limiting rings, the inner walls of the four fixing frames are rotatably connected to the connecting frame, the inner walls of one end of the four connecting frames are rotatably connected to the traction guide wheel, one side of the four connecting frames is fixed with a spring, and one end of the four springs is fixedly connected to one side of the four fixing frames respectively, a heating groove is provided at the edge of the inner wall of one end of the barrel, and a heating pipe is installed on the inner wall of the heating groove.

[0010] In one example, the inner wall of one end of the barrel is rotatably connected to a rotating shaft, the outer wall of one end of the auger and the outer wall of the rotating shaft are fixedly provided with gear rings, the outer walls of the two gear rings are engaged with a transmission belt, a first motor is installed on one side of the outer wall of the barrel, and one end of the rotating shaft passes through the outer wall of one side of the barrel and is fixedly connected to the output end of the first motor.

[0011] In one example, the feeding assembly includes a first feeding hopper installed on one side of the top of the barrel, and the inner wall of the first feeding hopper is connected to the inner wall of the guide trough, and electric push rods are installed on the edges of both sides of the top of the first feeding hopper.

[0012] In one example, a protective cover is fixedly provided at the output end of the two electric push rods, the bottom of the protective cover passes through the inner wall of the first feed hopper and is rotatably connected to a connecting shaft, and a stirring blade is fixedly provided at the bottom of the connecting shaft.

[0013] In one example, a second motor is installed in the middle of the top of the protective cover, and one end of the connecting shaft passes through the top of the protective cover and is fixedly connected to the output end of the second motor, and a second feed hopper is installed on one side of the top of the protective cover.

[0014] In one example, a thread groove is provided on the other side of the outer wall of the barrel, a head mold is installed at one end of the barrel, a thread ring is fixed on one side of the head mold, and the outer wall of the thread ring is threadedly connected to the inner wall of the thread groove.

[0015] In one example, the circulating cooling and shaping mechanism includes a spiral guide groove opened in the inner wall of the head mold, and liquid inlet pipes are inserted and connected on both sides of the head mold, and the inner walls of one end of the two liquid inlet pipes are respectively connected to the inner walls of the two ends of the spiral guide groove, and the inner walls of the two liquid inlet pipes are inserted and connected with conduits.

[0016] In one example, a water tank is installed on one side of the bottom of the support base, one end of the two conduits is respectively connected to the inner walls at both ends of the water tank, and a condenser is installed at the upper edge of the inner wall of the water tank.

[0017] In one example, a control panel is installed on one side of the top of the support base, and the heating tube, the first motor, the electric push rod, the second motor and the condenser are all electrically connected to the external power supply through the control panel.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting up a concentric extrusion mechanism, during the extrusion process, interconnected wire core grooves are opened on the barrel and the auger to transfer the wire core. At the same time, the outer sheath material is transferred through the auger in the guide trough to achieve same-direction transfer. During this process, the wire core passes through the limit ring, and a spring is set between the fixing frame and the connecting frame to automatically adjust the distance of the traction guide wheel according to the diameter of the wire core, so as to automatically adapt to wire cores of different diameters for central transfer, prevent the wire core from sagging during transfer, avoid large eccentricity between it and the outer sheath, and improve the processing quality of the cable;

[0020] 2. By setting up a feeding assembly, when feeding, the raw materials are introduced into the second feeding hopper below through the second feeding hopper, and the materials are guided under the protection of the protective cover. During this process, the second motor is started to rotate the stirring blade through the connecting shaft, so that the raw materials are stirred and crushed at the feeding port. After the raw materials are further crushed, they are melted faster and more delicately in the later stage, reducing the occurrence rate of rough and defective skin. At the same time, the feeding end is not easily blocked after stirring, causing the equipment to be unusable, reducing resource waste while improving processing efficiency;

[0021] 3. By setting up a circulating cooling and shaping mechanism, during extrusion molding, cold water is flowed around the periphery of the head mold through the spiral guide groove, and its extrusion area is quickly cooled down, which facilitates the rapid cooling of the cable, and then the temperature of the outer skin of the newly extruded cable is quickly reduced. When it is transmitted out, it is not easy to be touched and have groove defects. After the cold water is guided by the spiral guide groove, it is discharged from the lower liquid inlet pipe into the water tank below. After being quickly cooled by the condenser tube inside the water tank, its temperature affected by high temperature drops again and is introduced into the spiral guide groove from another liquid inlet pipe through a conduit to continue cooling the cable. This not only achieves the purpose of pre-forming inside the extrusion device during cable processing, prevents damage by touch during extrusion, and improves the protection of the device, but also realizes water circulation cooling and improves the energy saving of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0023] Figure 2 It is a schematic structural diagram of the interior of the barrel of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the side surface of the barrel of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the overall auger of the present invention;

[0026] Figure 5 Schematic diagram of the structure inside the limiting ring of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the entire feeding assembly of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure inside the die of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the interior of the water storage tank of the present invention.

[0030] Figure: 1. Support base; 2. Concentric extrusion mechanism; 201. Cylinder; 202. Guide trough; 203. Auger; 204. Wire core groove; 205. Annular limit slide; 206. Limit ring; 207. Fixing frame; 208. Connecting frame; 209. Puller; 210. Spring; 211. Heating trough; 212. Heating tube; 3. Rotating shaft; 4. Gear ring; 5. Transmission belt; 6. First motor; 7. Feed Components; 701, first feed hopper; 702, electric push rod; 703, protective cover; 704, connecting shaft; 705, stirring blade; 706, second motor; 707, second feed hopper; 8, thread groove; 9, head mold; 10, thread ring; 11, circulating cooling and shaping mechanism; 1101, spiral guide groove; 1102, liquid inlet pipe; 1103, conduit; 1104, water tank; 1105, condenser. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-8 The present invention provides a technical solution: a high-precision concentricity extrusion device for wires and cables, comprising a support base 1, a concentric extrusion mechanism 2, a feeding assembly 7 and a circulating cooling and shaping mechanism 11 are arranged at the upper end of the support base 1.

[0033] The concentric extrusion mechanism 2 includes a barrel 201 fixedly mounted on the top of the support base 1, the inner wall of the barrel 201 is provided with a material guide trough 202, the inner wall of the material guide trough 202 is rotatably connected to a screw dragon 203, the inner wall of the screw dragon 203 and the inner wall of one end of the barrel 201 are provided with a wire core groove 204, and the inner walls of the two wire core grooves 204 are connected to each other, the inner walls of one end of the two wire core grooves 204 are provided with an annular limiting slide 205, the inner walls of the two annular limiting slides 205 are rotatably connected to the limiting ring 206, and both sides of the inner walls of the two limiting rings 206 are fixed with a fixing frame 207, and the inner walls of the four fixing frames 207 are rotatably connected It is connected to a connecting frame 208, and the inner walls of one end of the four connecting frames 208 are rotatably connected to traction guide wheels 209. One side of the four connecting frames 208 is fixed with a spring 210, and one end of the four springs 210 is fixedly connected to one side of the four fixing frames 207. A heating groove 211 is opened at the edge of the inner wall of one end of the barrel 201, and a heating pipe 212 is installed on the inner wall of the heating groove 211. When the auger 203 transfers the raw material to one end of the guide trough 202, the temperature is quickly increased by starting the heating pipe 212 in the heating groove 211 to melt it, and the raw material is continuously transferred to the head mold 9 and wrapped around the outer side of the wire core for cable forming;

[0034] When in use, the copper core passes through the wire core groove 204 inside the barrel 201 and the screw core groove 204 inside the auger 203, and is passed through the external traction device for traction and pulling. During this process, the outer skin raw material is added to the guide groove 202 through the feeding component 7 and the auger 203 is rotated to extrude the raw material and transmit it and the copper core to the head mold 9 in the same direction for extrusion and wrapping. During extrusion, the wire core passes through the wire core groove 204 inside the barrel 201 and the wire core groove 204 inside the auger 203 respectively. In the wire core groove 204, the wire The core passes through the limiting ring 206 and is inserted into the two pulling guide wheels 209 inside the limiting ring 206. The two pulling guide wheels 209 are rotatably connected by the connecting frames 208 on both sides of the limiting ring 206. At the same time, the connecting frames 208 on both sides are rotatably connected to the fixing frames 207 fixed on both sides of the limiting ring 206, and the two are connected by springs 210, so that when the wire cores of different diameters pass through the barrel 201, their outer walls are squeezed between the two pulling guide wheels 209. Figure 5 As shown, the distance between the traction guide wheels 209 on both sides is automatically adjusted by the compression spring 210, so that it can automatically adapt to the wire cores of different diameters and transfer them in the center. During the extrusion process, the sagging distance of the wire core is reduced, thereby reducing the eccentricity difference between the wire core and the outer sheath, thereby improving the processing quality of the cable;

[0035] Further, as the instructions Figure 2As shown, the inner wall of one end of the barrel 201 is rotatably connected to the rotating shaft 3, and the outer wall of one end of the auger 203 and the outer wall of the rotating shaft 3 are fixedly provided with a gear ring 4, and the outer walls of the two gear rings 4 are meshed with a transmission belt 5 for transmission. A first motor 6 is installed on one side of the outer wall of the barrel 201, and one end of the rotating shaft 3 passes through the outer wall of one side of the barrel 201 and is fixedly connected to the output end of the first motor 6. During the process of the auger 203 rotating to transmit the raw material, the first motor 6 on one side of the barrel 201 is started to drive the rotating shaft 3 to rotate, and then the auger 203 is rotated and guided in the guide trough 202 through the meshing transmission between the two gear rings 4 and the transmission belt 5;

[0036] Furthermore, the feeding assembly 7 includes a first feeding hopper 701 installed on one side of the top of the barrel 201, and the inner wall of the first feeding hopper 701 is connected to the inner wall of the guide groove 202. Electric push rods 702 are installed on the edges of both sides of the top of the first feeding hopper 701. The first feeding hopper 701 guides the input raw materials into the guide groove 202 inside the barrel 201.

[0037] A protective cover 703 is fixedly provided at the output end of the two electric push rods 702. The bottom of the protective cover 703 passes through the inner wall of the first feed hopper 701 and is rotatably connected to a connecting shaft 704. A stirring blade 705 is fixedly provided at the bottom of the connecting shaft 704. During the material guiding process, when the raw material enters the first feed hopper 701, the second motor 706 on the top of the protective cover 703 is started to rotate the connecting shaft 704 and then rotate the stirring blade 705. The raw material that continuously falls into the first feed hopper 701 is crushed at the port where it enters the barrel 201. While further shredding it, the raw material can also be continuously stirred at the entry end to avoid clogging the feed port.

[0038] A second motor 706 is installed in the middle of the top of the protective cover 703, and one end of the connecting shaft 704 passes through the top of the protective cover 703 and is fixedly connected to the output end of the second motor 706. A second feeding hopper 707 is installed on one side of the top of the protective cover 703. After the further minced raw materials enter the barrel 201, they are more easily melted, making the outer sheath of the extruded cable smoother and less prone to defective products. This not only reduces the waste of resources caused by defective products, but also improves the cable processing efficiency.

[0039] Further, as the instructions Figure 7 As shown, a thread groove 8 is provided on the other side of the outer wall of the barrel 201, and a head mold 9 is installed at one end of the barrel 201. A threaded ring 10 is fixedly provided on one side of the head mold 9, and the outer wall of the threaded ring 10 is threadedly connected to the inner wall of the threaded groove 8. The head mold 9 can be threadedly connected to its own threaded ring 10 through the threaded groove 8 at one end of the barrel 201, which is convenient for disassembly and maintenance of the internal structure of the barrel 201.

[0040] Furthermore, the circulating cooling and molding mechanism 11 includes a spiral guide groove 1101 opened in the inner wall of the head mold 9, and the two sides of the head mold 9 are interspersed with liquid inlet pipes 1102, and the inner walls of one end of the two liquid inlet pipes 1102 are respectively connected to the inner walls of the two ends of the spiral guide groove 1101, and the inner walls of the two liquid inlet pipes 1102 are interspersed with conduits 1103, and the cooling groove opened on the inner wall of the head mold 9 is threadedly surrounded on the outside of the molding area of ​​the head mold 9.

[0041] As the instruction manual Figure 8 As shown, a water tank 1104 is installed on one side of the bottom of the support base 1, and one end of the two guide tubes 1103 is respectively connected to the inner wall of the two ends of the water tank 1104, and a condenser 1105 is installed on the upper edge of the inner wall of the water tank 1104. During extrusion molding, the spiral guide groove 1101 guides the cold water to contact the inside of the head mold 9, so that the temperature inside the head mold 9 is quickly reduced, and then the temperature of the outer skin of the newly extruded cable is quickly reduced. When it is transmitted, it is not easy to be touched and there will be groove defects, and the cold water will be discharged through the spiral guide groove 1101. After the flow channel 1101 is guided, it is discharged from the liquid inlet pipe 1102 on the lower side into the water tank 1104 below. After being quickly cooled by the condenser 1105 inside the water tank 1104, its temperature affected by the high temperature is lowered again and introduced into the spiral guide channel 1101 from another liquid inlet pipe 1102 through the conduit 1103 to continue cooling the cable. This not only achieves the purpose of pre-forming inside the extrusion device during cable processing, prevents damage by touch during extrusion, and improves the protection of the device, but also realizes water circulation cooling and improves the energy saving of the device.

[0042] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0043] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A high-precision concentricity extrusion device for wires and cables, comprising a support base (1), characterized in that: A concentric extrusion mechanism (2), a feeding assembly (7), and a circulating cooling and shaping mechanism (11) are provided at the upper end of the support base (1); The concentric extrusion mechanism (2) comprises a barrel (201) fixedly mounted on the top of the support base (1), the inner wall of the barrel (201) is provided with a material guide groove (202), the inner wall of the material guide groove (202) is rotatably connected to an auger (203), the inner wall of the auger (203) and the inner wall of one end of the barrel (201) are both provided with a wire core groove (204), and the inner walls of the two wire core grooves (204) are interconnected, the inner walls of one end of the two wire core grooves (204) are both provided with an annular limiting slide groove (205), and the inner walls of the two annular limiting slide grooves (205) are both rotatably connected to a limiting ring (206), Fixed frames (207) are fixed on both sides of the inner walls of the two limiting rings (206), the inner walls of the four fixing frames (207) are rotatably connected to connecting frames (208), the inner walls of one end of the four connecting frames (208) are rotatably connected to traction guide wheels (209), one side of the four connecting frames (208) is fixed with springs (210), and one end of the four springs (210) is fixedly connected to one side of the four fixing frames (207), a heating groove (211) is opened at the edge of the inner wall of one end of the barrel (201), and a heating pipe (212) is installed on the inner wall of the heating groove (211).

2. A high-precision concentricity extrusion device for electric wires and cables according to claim 1, characterized in that: The inner wall of one end of the barrel (201) is rotatably connected to a rotating shaft (3), the outer wall of one end of the auger (203) and the outer wall of the rotating shaft (3) are both fixedly provided with a gear ring (4), the outer walls of the two gear rings (4) are meshed with a transmission belt (5), a first motor (6) is installed on one side of the outer wall of the barrel (201), and one end of the rotating shaft (3) passes through the outer wall of one side of the barrel (201) and is fixedly connected to the output end of the first motor (6).

3. A high-precision concentricity extrusion device for electric wires and cables according to claim 2, characterized in that: The feeding assembly (7) comprises a first feeding hopper (701) mounted on one side of the top of the barrel (201), wherein the inner wall of the first feeding hopper (701) is connected to the inner wall of the guide trough (202), and electric push rods (702) are mounted on the edges of both sides of the top of the first feeding hopper (701).

4. A high-precision concentricity extrusion device for electric wires and cables according to claim 3, characterized in that: A protective cover (703) is fixedly provided at the output ends of the two electric push rods (702), and the bottom of the protective cover (703) passes through the inner wall of the first feed hopper (701) and is rotatably connected to a connecting shaft (704), and a stirring blade (705) is fixedly provided at the bottom of the connecting shaft (704).

5. The high-precision concentricity extrusion device for electric wires and cables according to claim 4, characterized in that: A second motor (706) is installed in the middle of the top of the protective cover (703), and one end of the connecting shaft (704) passes through the top of the protective cover (703) and is fixedly connected to the output end of the second motor (706). A second feeding hopper (707) is installed on one side of the top of the protective cover (703).

6. The high-precision concentricity extrusion device for electric wires and cables according to claim 5, characterized in that: A threaded groove (8) is provided on the other side of the outer wall of the barrel (201), a head mold (9) is installed at one end of the barrel (201), a threaded ring (10) is fixedly provided on one side of the head mold (9), and the outer wall of the threaded ring (10) is threadedly connected to the inner wall of the threaded groove (8).

7. The high-precision concentricity extrusion device for electric wires and cables according to claim 6, characterized in that: The circulating cooling shaping mechanism (11) comprises a spiral guide groove (1101) provided in the inner wall of the die head mold (9), and liquid inlet pipes (1102) are inserted and connected on both sides of the die head mold (9), and the inner walls of one end of the two liquid inlet pipes (1102) are respectively connected to the inner walls of the two ends of the spiral guide groove (1101), and the inner walls of the two liquid inlet pipes (1102) are inserted and connected with a conduit (1103).

8. The high-precision concentricity extrusion device for electric wires and cables according to claim 7, characterized in that: A water storage tank (1104) is installed on one side of the bottom of the support base (1), one end of the two conduits (1103) is respectively connected to the inner walls of the two ends of the water storage tank (1104), and a condensation pipe (1105) is installed at the upper edge of the inner wall of the water storage tank (1104).

9. The high-precision concentricity extrusion device for electric wires and cables according to claim 8, characterized in that: A control panel is installed on one side of the top of the support base (1), and the heating tube (212), the first motor (6), the electric push rod (702), the second motor (706) and the condenser tube (1105) are all electrically connected to an external power supply through the control panel.

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