Doubling die for copper cable stranding machine

Abstract

The invention relates to the field of doubling dies, and discloses a doubling die for a copper cable stranding machine, a copper wire coil, a doubling mechanism, a twisting machine and a winding disc are sequentially arranged from left to right, a plurality of copper wires penetrate through the copper wire coil, and all the copper wires sequentially extend through the doubling mechanism and the twisting machine and then are wound to the surface of the winding disc. According to the doubling mold body, the mold does not need to be replaced, the number of the channels is adjusted through rotation of the inner mold pipe, the adjusting bolts are matched with the rubber tightening rings to change the sizes of the channels, different wire numbers and wire diameters are adapted, and efficiency is improved. And the guide bulge of the gathering hopper is cooperated with the adjusting block, so that the copper wire harnesses are gathered more regularly. And a locking point is formed through the convex pressing block and the concave pressing block in the doubling process, so that the cable is prevented from being reversely twisted and loosened. All the structures are tightly matched, operation is easy and convenient, labor intensity is reduced, stable cable quality is guaranteed, and applicability and practicability of the stranding machine are enhanced.

Description

Technical Field

[0001] This invention relates to the field of wire twisting molds, specifically a wire twisting mold for copper wire stranding machines. Background Technology

[0002] A stranding machine is a mechanical device used to strand multiple metal wires, such as copper, aluminum, steel wire, or fibers, into one or more strands. It is widely used in industries such as wire and cable, wire rope, optical cable, and steel-cored aluminum stranded wire. By rotating and stranding, multiple single wires or strands are wound into a tightly structured and stronger stranded wire according to specific rules such as direction and pitch to improve conductivity, mechanical strength, or flexibility. However, in existing stranding machines, it is inconvenient to change the stranding molds with different settings in processes with different wire count requirements. Furthermore, the formed cable only has fixed points at both ends. In some cases, such as during handling, it may separate or twist in the opposite direction, causing the twisted cable to loosen again. Summary of the Invention

[0003] The present invention provides a wire-splitting mold for a copper wire stranding machine, which overcomes the shortcomings described in the background art.

[0004] The technical solution adopted by this invention to solve its technical problem is: A wire-splitting mold for a copper wire stranding machine includes, from left to right, a copper wire spool, a wire-splitting mechanism, a twisting machine, and a winding reel. Multiple copper wires pass through the copper wire spool, and all copper wires extend sequentially through the wire-splitting mechanism and the twisting machine before winding onto the surface of the winding reel. The wire-splitting mechanism includes a wire-splitting mold body, a gathering hopper, a first cylinder, and a second cylinder. A convex pressure block is provided on the output shaft of the first cylinder, and a concave pressure block corresponding to the convex pressure block is provided above the second cylinder. The convex and concave pressure blocks face each other, and the surface of the convex pressure block gradually bulges from the edge to the center. A movable block, mounted on the output shaft of the second cylinder, is provided at the corresponding position in the center of the concave and convex pressure blocks. The paralleling mold body includes an inner mold tube and an outer mold tube sleeved outside the inner mold tube. A channel for copper wires to pass through is formed between the outer mold tube and the inner mold tube. The channel is connected to the gathering bucket. The gathering bucket has a conical structure. The large-diameter end of the gathering bucket is set towards the channel of the paralleling mold body, while the small-diameter end is set towards the convex pressure block and the concave pressure block. The gathering hopper is provided with guide protrusions arranged in a ring array, and the guide protrusions extend in a curved shape.

[0005] A preferred technical solution is that the outer mold tube includes symmetrically arranged outer mold units, each outer mold unit having a fixing ear on both sides, the fixing ears on the two outer mold units abutting each other and being fixed by bolts; The outer mold unit is provided with an arc-shaped retaining plate on its outer side, and the gathering bucket is provided with a limiting retaining ring corresponding to the arc-shaped retaining plate on the side near the parallel mold body. The limiting retaining ring is abutted against the arc-shaped retaining plate.

[0006] In a preferred embodiment, the inner mold tube includes an adjusting tube, a protrusion, and an adjusting block. The protrusion and the adjusting block are rotatably arrayed on the outside of the adjusting tube, and the protrusion and the adjusting block are staggered. Each adjusting block has a channel groove II on its surface. The adjacent surfaces of the outer mold unit and the inner mold tube have a channel groove I. When the inner mold tube is rotated until the channel groove II and the channel groove I are aligned, the channel groove II and the channel groove I form the channel. This channel and the secondary channel provided in the middle of the adjusting tube are connected to the gathering hopper. The diameter of channel groove two is larger than the diameter of channel groove one.

[0007] In a preferred embodiment, the surface of the adjusting block is provided with a second groove, the surface of the protrusion is provided with a first groove, the second groove is connected to the first groove, and the inner mold tube is covered with a rubber tightening ring, which abuts against the surfaces of the second groove and the first groove. The outer mold unit is provided with multiple limiting arc blocks. When the outer mold tube is fixed outside the inner mold tube, the limiting arc blocks are embedded in the second slot and the first slot.

[0008] A preferred technical solution is that there is a gap between the inner mold tube and the outer mold tube; The adjusting block has a threaded hole on the side near the adjusting tube, and an adjusting bolt is threaded into the threaded hole. The outer diameter of the adjusting bolt gradually bulges from the middle to the top. When the adjusting bolt is rotated downwards, it gradually pushes the adjusting block outwards.

[0009] In a preferred embodiment, when the adjusting bolt is rotated downward and the adjusting block is pushed outward, the adjusting block abuts against the inner side of the outer mold tube, and the second slot is offset from the first slot. The inner side of the adjusting bolt is also provided with a magnetic block so that the magnetic block can attract the adjusting block.

[0010] Compared with existing technologies, this technical solution has the following advantages: The paralleling mold body of this invention eliminates the need for mold replacement. The number of channels is adjusted by rotating the inner mold tube, and the channel size is changed by adjusting bolts in conjunction with rubber tightening rings, adapting to different wire counts and diameters and improving efficiency. The gathering bucket guide protrusion and adjusting block work together to ensure more uniform gathering of the copper wire bundle. During paralleling, convex and concave pressure blocks form locking points to prevent the cables from twisting and loosening in the opposite direction. All structures fit tightly together, making operation simple, reducing labor intensity, ensuring stable cable quality, and enhancing the applicability and practicality of the stranding machine. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is an overall diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the paralleling mechanism.

[0014] Figure 3 A schematic diagram of the structure for adjusting the number of channels in the parallel die body.

[0015] Figure 4 Another structural diagram showing the adjustment of the number of channels in the parallel die body.

[0016] Figure 5 This is a schematic diagram of the outer mold tube.

[0017] Figure 6 This is a schematic diagram of the inner mold tube.

[0018] Figure 7 This is a schematic diagram of the inner mold tube that pushes the adjusting block outward.

[0019] Figure 8 This is a schematic diagram of the adjusting bolt.

[0020] Figure 9 This is a schematic diagram of a gathering bucket.

[0021] Figure 10 This is a schematic diagram of a half-section of the collection bucket.

[0022] Figure 11 This is a schematic diagram of the concave pressure block and the movable block.

[0023] In the diagram: 1. Copper wire reel; 2. Wire twisting mechanism; 3. Twisting machine; 4. Reel. The components include: a parallel die body 21, a gathering bucket 22, a first cylinder 23, a convex pressure block 231, a second cylinder 24, a concave pressure block 241, and a movable block 242. Outer mold tube 211, outer mold unit 2111, fixing ear 2112, arc-shaped clamping plate 2113, channel groove 1 2114, limiting arc-shaped block 2115. Inner mold tube 212, adjusting tube 2121, secondary channel 1211, protrusion 2122, first slot 1221, adjusting block 2123, channel groove 2 1231, threaded hole 1232, adjusting bolt 1233, magnetic block 2331, second slot 1234, rubber tightening ring 2124; Guide protrusion 221, limiting ring 222. Detailed Implementation

[0024] like Figures 1 to 11As shown, the present invention proposes a wire-splitting mold for a copper wire stranding machine. From left to right, it is provided with a copper wire spool 1, a wire-splitting mechanism 2, a twisting machine 3, and a winding reel 4. Multiple copper wires are threaded through the copper wire spool 1. All copper wires extend sequentially through the wire-splitting mechanism 2 and the twisting machine 3 and are then wound onto the surface of the winding reel 4. The wire-splitting mechanism 2 includes a wire-splitting mold body 21, a gathering bucket 22, a first cylinder 23, and a second cylinder 24. A convex pressure block 231 is provided on the output shaft of the first cylinder 23. A concave pressure block 241 corresponding to the convex pressure block 231 is provided above the second cylinder 24. The convex pressure block 231 and the concave pressure block 241 face each other. The surface of the convex pressure block 231 gradually bulges from the edge to the middle. A movable block 242 installed on the output shaft of the second cylinder 24 is provided at the corresponding position of the middle of the concave pressure block 241 and the convex pressure block 231. The paralleling mold body 21 includes an inner mold tube 212 and an outer mold tube 211 sleeved outside the inner mold tube 212. A channel for copper wires to pass through is formed between the outer mold tube 211 and the inner mold tube 212. The channel is connected to the gathering bucket 22. The gathering bucket 22 has a conical structure. The large diameter end of the gathering bucket 22 is set towards the channel of the paralleling mold body 21, while the small diameter end is set towards the convex pressure block 231 and the concave pressure block 241. The gathering hopper 22 is provided with guide protrusions 221 arranged in a ring array, and the guide protrusions 221 extend in a curved shape.

[0025] After the copper wire bundle is led out from the copper wire reel 1, it enters the gathering hopper 22. The gathering hopper 22 has a conical structure, with the larger diameter end facing the channel of the paralleling mold body 21, and the smaller diameter end facing the convex pressure block 231 and the concave pressure block 241. Inside the gathering hopper 22, the copper wire bundle slides along the guide protrusions 221 on its inner wall. The guide protrusions 221 are arranged in a circular array and extend in a curved shape, which can gradually guide multiple copper wires to the center position, so that the copper wire bundle completes the initial gathering before entering the paralleling mold body 21. Furthermore, the copper wire... After the wire bundle enters the wire bundling die body 21 from the gathering hopper 22, the first cylinder 23 drives the convex pressure block 231 to advance axially, and the second cylinder 24 drives the concave pressure block 241 and the movable block 242 to form a counter-pressure. The convex pressure block 231, the concave pressure block 241 and the movable block 242 form a radial locking point in the middle section of the channel. After the locking point is established, the twisting machine 3 continues to rotate, and the winding reel 4 pulls synchronously. The locking point prevents the wire bundle from rebounding in the opposite direction. After the twisting is completed, the cylinder is depressurized, the convex pressure block 231 retracts, the movable block 242 resets, and the locking point is released.

[0026] Furthermore, the outer mold tube 211 includes symmetrically arranged outer mold units 2111, and each outer mold unit 2111 has a fixing ear 2112 on both sides. The fixing ears 2112 on the two outer mold units 2111 abut each other and are fixed by bolts. The outer mold unit 2111 is provided with an arc-shaped clamping plate 2113 on its outer side, and the gathering bucket 22 is provided with a limiting ring 222 corresponding to the arc-shaped clamping plate 2113 on the side near the parallel mold body 21. The limiting ring 222 abuts against the arc-shaped clamping plate 2113.

[0027] Furthermore, the inner mold tube 212 includes an adjusting tube 2121, a protrusion 2122, and an adjusting block 2123. The protrusion 2122 and the adjusting block 2123 are rotatably arrayed on the outside of the adjusting tube 2121, and the protrusion 2122 and the adjusting block 2123 are staggered. Each adjusting block 2123 has a channel groove 2231 on its surface. The adjacent surfaces of the outer mold unit 2111 and the inner mold tube 212 have a channel groove 1114. When the inner mold tube 212 is rotated until the channel groove 2231 and the channel groove 1114 are aligned, the channel groove 2231 and the channel groove 1114 form the channel. This channel and the secondary channel 1211 provided in the middle of the adjusting tube 2121 are connected to the gathering bucket 22. When the inner mold tube 212 is rotated, channel groove 2 1231 and channel groove 1 2114 gradually align to form a complete channel, allowing the copper wire to pass through smoothly. Continuing to rotate the inner mold tube 212 can increase or decrease the number of aligned channel grooves, thereby achieving dynamic adjustment of the number of channels to accommodate different numbers of copper wires to be wired together. Furthermore, the diameter of channel groove 2 1231 is larger than the diameter of channel groove 1 2114. This dimensional difference helps the copper wire enter the wire-connecting mold body 21 more smoothly. In addition, the middle part of the adjusting tube 2121 is provided with a secondary channel 1211, which is connected to the gathering hopper 22 and plays an auxiliary guiding role for the copper wire. During the adjustment of the number of channels, the secondary channel 1211 can provide an additional guiding path for the copper wire, ensuring that the copper wire will not get stuck or become tangled when entering the wire-connecting mold body 21 due to changes in the number of channels.

[0028] Furthermore, the surface of the adjusting block 2123 is provided with a second slot 1234, the surface of the protrusion 2122 is provided with a first slot 1221, the second slot 1234 is connected to the first slot 1221, and the inner mold tube 212 is covered with a rubber tightening ring 2124, which abuts against the surfaces of the second slot 1234 and the first slot 1221. The outer mold unit 2111 is provided with a plurality of limiting arc blocks 2115. When the outer mold tube 211 is fixed outside the inner mold tube 212, the limiting arc blocks 2115 are embedded in the second slot 1234 and the first slot 1221. Furthermore, there is a gap between the inner mold tube 212 and the outer mold tube 211. The adjusting block 2123 is provided with a threaded hole 1232 on the side near the adjusting tube 2121. An adjusting bolt 1233 is threadedly connected to the threaded hole 1232. The outer diameter of the adjusting bolt 1233 gradually rises from the middle to the top. When the adjusting bolt 1233 is rotated downward, the adjusting block 2123 is gradually pushed outward.

[0029] When it is necessary to accommodate a thicker copper wire bundle or increase the number of copper wires (requiring an enlarged channel size), the operator rotates the adjusting bolt 1233 downwards. Because the bolt is threaded into the threaded hole 1232, the bolt moves axially downwards (closer to the adjusting tube 2121) during rotation.

[0030] At this point, the part of the bolt that "gradually bulges from the middle to the top" will gradually come into contact with and press against the inner side of the adjusting block 2123. Because the outer diameter at the top is larger, the pressing force gradually increases during the downward movement, eventually pushing the adjusting block 2123 outward (towards the outer mold tube 211), causing the adjusting block 2123 to produce radial displacement.

[0031] When it is necessary to accommodate a thinner copper wire bundle or reduce the number of copper wires (requiring a smaller channel size), the adjusting bolt 1233 is rotated in the opposite direction (upward rotation). The bolt moves upward along the axial direction, and the pressure between its raised part and the adjusting block 2123 is reduced. At this time, the rubber tightening ring 2124, which is sleeved outside the inner mold tube (previously stretched open due to the outward movement of the adjusting block and underwent elastic deformation), pulls the adjusting block 2123 inward to reset due to its own contraction force until the channel size meets the requirements.

[0032] The channel formed by the channel groove 2123 of the adjusting block 2123 and the channel groove 2114 of the outer mold tube is a "pre-constraint" structure before the copper wire bundle enters the gathering hopper 22 from the paralleling mold body 21. The adjusting block 2123 ensures that the shape of the channel groove 21231 is adapted to the copper wire bundle through precise reset (the function of the rubber tightening ring 2124) and size adjustment (the function of the adjusting bolt): for a wire bundle composed of multiple copper wires, the channel groove 21231 can initially gather the dispersed copper wires, preventing them from spreading out excessively before entering the gathering hopper 22.

[0033] In a preferred embodiment, when the adjusting bolt 1233 is rotated downward and the adjusting block 2123 is pushed outward, the adjusting block 2123 abuts against the inner side of the outer mold tube 211, and the second slot 1234 is offset from the first slot 1221. The inner side of the adjusting bolt is also provided with a magnetic block 2331 so that the magnetic block 2331 can attract the adjusting block.

[0034] Secondly, based on the above content and the appendix Figure 3 Appendix Figure 4As shown, the number of channels for copper wires to pass through, composed of channel slot one 2114 and channel slot two 1231, can be changed by rotating the inner mold tube 212, as shown in the attached figure. Figure 3 The inner mold tube 211 is rotated counterclockwise as shown in the attached diagram. Figure 4 The adjustment can be completed by using the four channels shown. Alternatively, the secondary channel 1211 can be used as a channel for copper wires to pass through.

[0035] The copper wire stranding machine of this invention achieves efficient stranding of multiple copper wires through the coordinated operation of a copper wire spool, a paralleling mechanism, a twisting machine, and a take-up reel. Its core lies in the flexible adjustment of the paralleling mechanism and the coordination of multiple components. The specific working principle is as follows: Copper wire lead-out and initial guidance: After multiple copper wires are drawn out from the copper wire reel 1, they first enter the paralleling mold body 21 of the paralleling mechanism 2. The paralleling mold body 21 consists of an outer mold tube 211 and an inner mold tube 212, forming a channel for the copper wires to pass through. The channel is connected to a conical gathering hopper 22. The distance between the inner mold tube 212 and the outer mold tube 211 provides space for the radial movement of the adjusting block 2123. By rotating the inner mold tube 212, the alignment number of the channel groove 1231 of the adjusting block 2123 and the channel groove 2114 of the outer mold tube can be adjusted to adapt to different wire count requirements. At the same time, rotating the adjusting bolt 1233 on the adjusting block 2123 can push the adjusting block 2123 through its raised structure to change the channel size to adapt to copper wires of different diameters. The rubber tightening ring 2124 ensures the stability of the adjusting block position through elastic reset, ensuring accurate channel alignment and structural sealing. Copper wire bundle convergence and pre-constraint: The copper wire bundle enters the gathering hopper 22 through the channel. The gathering hopper has a conical structure, with the large-diameter end connecting to the parallel die channel and the small-diameter end facing the pressing block assembly. Inside, arc-shaped guide protrusions 221 are arranged in a ring array, guiding the dispersed copper wires to slide along a curved path, gradually converging towards the center to form a neat wire bundle. Simultaneously, the staggered cooperation of the adjusting block 2123 and the protrusions 2122, constrained by the rubber tightening ring 2124, forms a closed ring structure, preventing the copper wire bundle from dispersing before entering the gathering hopper. This, combined with the guiding effect of the gathering hopper, forms a "relay constraint," laying a neat foundation for subsequent stranding. Locking and securing to prevent loosening: The gathered copper wire bundle is led out from the small-diameter end of the gathering hopper and enters between the convex pressure block 231 and the concave pressure block 241. The first cylinder 23 drives the convex pressure block (raised from the surface edge to the center) to advance axially, while the second cylinder 24 drives the concave pressure block and the movable block 242 to press against each other simultaneously, forming a radial locking point in the middle of the channel. This locking point can temporarily fix the copper wire bundle, preventing it from loosening due to reverse twisting during the twisting or handling process of the twisting machine 3. After the twisting is completed, the cylinder is depressurized, the pressure block is reset, and the locking point is released, without affecting subsequent winding. Twisting and winding forming: The copper wire bundle, secured by locking points, enters the twisting machine 3, where it is twisted into strands according to a preset direction and pitch under torsional force. The twisted cable is then pulled to the take-up reel 4, where it is wound up by rotation. Throughout the process, from the dispersed lead-out of the copper wire bundle to its final formation, the dynamic adjustment of the wire-connecting mechanism (adapting to different wire counts and diameters), the guiding constraint of the gathering hopper, the temporary locking of the pressure block, and the twisting action of the twisting machine enable the adaptation of multiple specifications of copper wire without frequent mold changes. This effectively prevents the cable from loosening after twisting, significantly improving the flexibility of the stranding machine and the quality of the formed cable.

[0036] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A wire-jointing mold for a copper wire stranding machine, comprising, from left to right, a copper wire spool, a wire-jointing mechanism, a twisting machine, and a winding reel, wherein multiple copper wires pass through the copper wire spool, and all copper wires extend sequentially through the wire-jointing mechanism and the twisting machine before being wound onto the surface of the winding reel, characterized in that, The paralleling mechanism includes a paralleling mold body, a gathering bucket, a first cylinder and a second cylinder. A convex pressure block is provided on the output shaft of the first cylinder, and a concave pressure block corresponding to the convex pressure block is provided above the second cylinder. The convex pressure block and the concave pressure block face each other. The surface of the convex pressure block gradually rises from the edge to the middle. A movable block installed on the output shaft of the second cylinder is provided at the corresponding position of the middle of the concave pressure block and the convex pressure block. The paralleling mold body includes an inner mold tube and an outer mold tube sleeved outside the inner mold tube. A channel for copper wires to pass through is formed between the outer mold tube and the inner mold tube. The channel is connected to the gathering bucket. The gathering bucket has a conical structure. The large-diameter end of the gathering bucket is set towards the channel of the paralleling mold body, while the small-diameter end is set towards the convex pressure block and the concave pressure block. The gathering hopper is provided with guide protrusions arranged in a ring array, and the guide protrusions extend in a curved shape.

2. The wire-splitting mold for a copper cable stranding machine according to claim 1, characterized in that, The outer mold tube includes symmetrically arranged outer mold units, each outer mold unit having a fixing lug on both sides. The fixing lugs on the two outer mold units abut against each other and are fixed by bolts. The outer mold unit is provided with an arc-shaped retaining plate on its outer side, and the gathering bucket is provided with a limiting retaining ring corresponding to the arc-shaped retaining plate on the side near the parallel mold body. The limiting retaining ring is abutted against the arc-shaped retaining plate.

3. A wire-splitting mold for a copper cable stranding machine according to claim 2, characterized in that, The inner mold tube includes an adjusting tube, a protrusion, and an adjusting block. The protrusion and the adjusting block are rotatably arrayed on the outside of the adjusting tube, and the protrusion and the adjusting block are staggered. Each adjusting block has a channel groove II on its surface. The adjacent surfaces of the outer mold unit and the inner mold tube have a channel groove I. When the inner mold tube is rotated until the channel groove II and the channel groove I are aligned, the channel groove II and the channel groove I form the channel. This channel and the secondary channel set in the middle of the adjusting tube are connected to the gathering bucket. The diameter of channel groove two is larger than the diameter of channel groove one.

4. A wire-splitting mold for a copper cable stranding machine according to claim 3, characterized in that, The surface of the adjusting block is provided with a second groove, the surface of the protrusion is provided with a first groove, the second groove is connected to the first groove, and the inner mold tube is covered with a rubber tightening ring, which abuts against the surfaces of the second groove and the first groove. The outer mold unit is provided with multiple limiting arc blocks. When the outer mold tube is fixed outside the inner mold tube, the limiting arc blocks are embedded in the second slot and the first slot.

5. A wire-splitting mold for a copper cable stranding machine according to claim 4, characterized in that, There is a gap between the inner mold tube and the outer mold tube; The adjusting block has a threaded hole on the side near the adjusting tube, and an adjusting bolt is threaded into the threaded hole. The outer diameter of the adjusting bolt gradually bulges from the middle to the top. When the adjusting bolt is rotated downwards, it gradually pushes the adjusting block outwards.

6. A wire-splitting mold for a copper cable stranding machine according to claim 5, characterized in that, When the adjusting bolt is rotated downwards and the adjusting block is pushed outwards, the adjusting block abuts against the inner side of the outer mold tube, and the second slot is offset from the first slot; The adjusting bolt is also provided with a magnetic block on its inner side, so that it can be attracted to the adjusting block.

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