Mechanism for longitudinal wrapping of a tape

Abstract

The invention relates to a longitudinal wrapping tape mechanism. The invention comprises a reel device, including a support frame and a plurality of reel assemblies arranged on the support frame, each of the reel assemblies comprising a support shaft connected to the support frame, a tape reel rotatably connected to the support shaft, and a tension adjusting assembly for adjusting the tape tension of the tape reel; a gathering device, including a gathering die for gathering the unwound tapes of the plurality of tape reels; a shaping device, including a positioning conduit and an extrusion head connected thereto, the gathered tapes passing through the positioning conduit and entering the extrusion head and being extruded. The invention uses a multi-head reel, which can place a plurality of small-width tapes to be longitudinally wrapped simultaneously, cooperates with a Half gathering die, and completely longitudinally wraps on the cable core through the positioning conduit, which can save production cost and time, improve production efficiency and improve the apparent quality of the cable sheath.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a longitudinal wrapping tape mechanism. Background Technology

[0002] Steel-tape armored power cables have different steel tape thicknesses, ranging from 0.2mm, 0.5mm, and 0.8mm, depending on the cable's outer diameter. A thicker steel tape results in greater rigidity but less flexibility, leading to poorer flatness on the cable surface, especially at overlapping areas where the two layers of steel tape overlap. This can cause sheath thickness differences and stress concentrations at the overlapping areas due to cooling and shrinkage during extrusion and stretching. Thickness differences can result in substandard average or thinnest point sheath thickness, while stress concentration increases the risk of future cracking. To mitigate the impact of the steel tape on sheath thickness and lifespan, manufacturers typically wrap a layer of steel tape between the steel tape and the polyethylene or polyolefin outer sheath. This layer improves the flatness between the two steel tape layers, reduces internal stress in the outer sheath material, and prevents substandard sheath thickness or cracking during use.

[0003] Currently, the steel strip armor layer is protected by a wrapping isolation tape process. This process has the following problems: 1. This method adds an extra wrapping production step, increasing process costs and reducing production efficiency; 2. The steel strip has poor flatness, and the wrapping tape is prone to breakage after wrapping and coiling, affecting the appearance quality of the subsequent extruded sheath; 3. The wrapping tape is wrapped on the cable core in the opposite direction to the extrusion of the sheath layer. If there is any curling edge, it can easily cause the sheath thickness to be unqualified. Summary of the Invention

[0004] Therefore, the present invention provides a longitudinal wrapping mechanism that can save production costs and time, improve production efficiency, and enhance the appearance quality of cable sheaths.

[0005] To solve the above-mentioned technical problems, the present invention provides a longitudinal bag strap mechanism, comprising: A reel device includes a bracket and a plurality of reel assemblies disposed on the bracket. Each reel assembly includes a support shaft connected to the bracket, a tape reel rotatably connected to the support shaft, and a tension adjusting component for adjusting the tape tension of the tape reel. A gathering device, including a gathering mold for gathering the tapes released from the plurality of said tape reels; The shaping device includes a positioning guide tube and an extrusion head connected thereto. The gathered tape enters the extrusion head through the positioning guide tube and is extruded.

[0006] In one embodiment of the present invention, a rotating sleeve and a bushing are further included. The rotating sleeve is fitted onto the support shaft and is rotatable around the support shaft. The bushing is fitted onto the rotating sleeve, and the strapping disc is fitted onto the bushing.

[0007] In one embodiment of the present invention, the tension adjustment assembly includes a movable clamping plate, a fixed clamping plate, a cap, and an elastic damper. The movable clamping plate is axially slidably sleeved on the rotating sleeve. The surfaces of the movable clamping plate and the fixed clamping plate are respectively in frictional contact with the wrapping reel. The elastic damper abuts against the outer side of the movable clamping plate to provide axial floating amount of the first clamping plate. The cap is threadedly connected to the outer circle of the rotating sleeve and abuts against the outer side of the fixed clamping plate so that the fixed clamping plate abuts against the bushing and / or the wrapping reel.

[0008] In one embodiment of the present invention, the elastic damper includes an elastic element, a pressure block, and a pressure plate that is axially slidably sleeved on the rotating sleeve. The elastic element is used to provide a force for the pressure block to press against the pressure plate, so that the pressure plate abuts against the movable clamping plate.

[0009] In one embodiment of the present invention, the elastic damper further includes a tension sleeve, an adjusting plate, and an adjusting handle. The elastic element includes a helical spring. The adjusting plate is disposed at one axial end of the tension sleeve. The adjusting handle is threadedly connected to the adjusting plate. The pressure block is slidably connected to the inner hole of the tension sleeve and one end abuts against the pressure plate. The elastic element abuts against the adjusting handle and the pressure block respectively.

[0010] In one embodiment of the present invention, a limiting plate is fitted onto the side of the pressure plate away from the movable clamping plate.

[0011] In one embodiment of the present invention, bearings are respectively fitted at both ends of the support shaft, and the rotating sleeve is fitted on the support shaft and rotates around the support shaft through the bearings.

[0012] In one embodiment of the present invention, the support includes a base, a column, and a triangular reinforcing frame connecting the base and the column.

[0013] In one embodiment of the present invention, the support shaft is an optical axis, the support shaft is connected to the column, and the tension sleeve is connected to the column.

[0014] In one embodiment of the present invention, the gathering mold includes two freely opening and closing half-molds, the two half-molds forming a ring, and a sensing device is provided inside the ring. The sensing device is connected to an alarm, and the alarm sounds an alarm when the strap breaks or deviates from the predetermined path.

[0015] The technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses a longitudinal packaging tape mechanism that directly drags the longitudinal packaging tape at the die base during the extrusion of the sheath, reducing one production step, saving production costs and time, and improving production efficiency.

[0016] This invention uses a longitudinal wrapping process, with the direction of the wrapping tape and the sheath being the same, to avoid damage and curling of the wrapping tape and improve the appearance quality of the cable sheath.

[0017] This invention employs a multi-head winding frame (multiple winding assemblies) which can hold multiple narrow-width wrapping tapes for simultaneous longitudinal wrapping. In conjunction with a half-gathering mold, the tapes are positioned and completely longitudinally wrapped onto the cable core via a guide tube. Attached Figure Description

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the roller device structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the roll assembly structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the gathering device structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the shaping device of the present invention.

[0023] Explanation of reference numerals in the instruction manual: 100. Reel device; 200. Gathering device; 201. Gathering mold; 202. Alarm; 300. Shaping device; 301. Positioning guide tube; 1. Reel assembly; 11. Support shaft; 111. Bearing; 112. Snap ring; 12. Tape reel; 13. Tension adjustment assembly; 14. Movable clamp; 15. Fixed clamp; 16. Cap; 17. Elastic damper; 171. Elastic element; 172. Pressure block; 173. Pressure plate; 174. Tension sleeve; 175. Adjusting plate; 176. Adjusting handle; 18. Limiting plate; 2. Rotating sleeve; 3. Bushing; 4. Bracket; 41. Base; 42. Column; 43. Triangular reinforcement frame. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0025] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0026] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0028] Reference Figures 1 to 4 As shown, a longitudinal packing strap mechanism includes: The reel device 100 includes a bracket 4 and a plurality of reel assemblies 1 disposed on the bracket 4. The plurality of reel assemblies 1 are arranged in a cross shape. Each reel assembly 1 includes a support shaft 11 connected to the bracket 4, a tape reel 12 rotatably connected to the support shaft 11, and a tension adjusting component 13 for adjusting the tape tension of the tape reel 12. The gathering device 200 includes a gathering mold 201 for gathering the tapes released from the plurality of tape reels 12; The shaping device 300 includes a positioning guide tube 301 and an extrusion head connected thereto. The gathered tape enters the extrusion head through the positioning guide tube 301 and is extruded.

[0029] Specifically, it also includes a rotating sleeve 2 and a bushing 3. The rotating sleeve 2 is fitted onto the support shaft 11 and can rotate around the support shaft 11. The bushing 3 is fitted onto the rotating sleeve 2, and the strapping disc 12 is fitted onto the bushing 3. In some embodiments, bearings 111 are respectively fitted at both axial ends of the support shaft 11, which can be fixed by snap rings 112 or shaft shoulders. The rotating sleeve 2 is fitted onto the support shaft 11 and rotates around the support shaft 11 through the bearings 111.

[0030] In some embodiments, the tension adjustment assembly 13 includes a movable clamping plate 14, a fixed clamping plate 15, a cap 16, and an elastic damper 17. The movable clamping plate 14 is axially slidably sleeved on the rotating sleeve 2. The surfaces of the movable clamping plate 14 and the fixed clamping plate 15 are respectively in frictional contact with the wrapping reel 12. The elastic damper 17 abuts against the outer side of the movable clamping plate 14 to provide axial floating amount of the first clamping plate. The cap 16 is threaded to the outer circle of the rotating sleeve 2 and abuts against the outer side of the fixed clamping plate 15 so that the fixed clamping plate 15 abuts against the bushing 3 and / or the wrapping reel 12. A limiting plate 18 is sleeved on the side of the pressure plate 173 away from the movable clamping plate 14.

[0031] In some embodiments, the elastic damper 17 includes an elastic element 171, a pressure block 172, and a pressure plate 173 axially slidably fitted onto the rotating sleeve 2. The elastic element 171 provides a force for the pressure block 172 to press against the pressure plate 173, so that the pressure plate 173 abuts against the movable clamping plate 14. The pressure plate 173 has cushioning properties, such as being made of bakelite.

[0032] Specifically, the elastic damper 17 further includes a tension sleeve 174, an adjusting plate 175, and an adjusting handle 176. The elastic element 171 includes a helical spring. The adjusting plate 175 is disposed at one axial end of the tension sleeve 174. The adjusting handle 176 is threadedly connected to the adjusting plate 175. The pressure block 172 is slidably connected to the inner hole of the tension sleeve 174 and one end abuts against the pressure plate 173. The elastic element 171 abuts against the adjusting handle 176 and the pressure block 172 respectively.

[0033] With the above-mentioned configuration, the reel device 100 is detachable, which facilitates maintenance after disassembly.

[0034] In some embodiments, the bracket 4 includes a base 41, a column 42, and a triangular reinforcing frame 43 connected between the base 41 and the column 42. The support shaft 11 is an optical axis, the support shaft 11 is connected to the column 42, and the tension sleeve 174 is connected to the column 42.

[0035] In some embodiments, the gathering mold 201 includes two freely opening and closing half molds, which form a ring. A sensing device is provided inside the ring, including an infrared sensor. The sensing device is connected to an alarm 202 and can be controlled by a PLC. When the strap breaks or deviates from the predetermined path, the alarm 202 will issue an alarm reminder.

[0036] Specifically, the positioning guide tube 301 is connected to the extruder head by threads. The positioning guide tube 301 has a small flared mouth and a length-to-diameter ratio of 2:1 in the sizing zone. This length is conducive to the wrapping object fitting the cable core. While the extruder extrudes the sheath, the wrapping tape is fixed to the cable core by the mold.

[0037] During operation, multiple (cross-shaped) reel assemblies 1 are installed on the support 4. Each reel assembly 1 has a support shaft 11 and an adjustable tension wrapping reel 12. The reel bushing 3 is fitted with a rotating sleeve 2. The reel assembly 1 releases the wrapping tape, while the tension adjustment component 13 ensures that the wrapping tape tension remains constant to prevent breakage. The tape is transported to the gathering device 200, where the half-die gathers the multiple wrapping tapes released from the reel into a single unit. The gathered wrapping tape is then conveyed to the extruder head through the positioning guide tube 301. The sensing device monitors the status of the wrapping tape and issues an alarm through the alarm 202 when an abnormality occurs. The PLC control system responds and processes the alarm. The positioning guide tube 301 accurately positions and shapes the wrapping tape, and together with the extruder head, extrudes the sheath material and the wrapping tape simultaneously. The wrapping tape adheres tightly to the surface of the cable core and longitudinally composites with the sheath to form an integrated structure.

[0038] This mechanism can complete the longitudinal wrapping of cable tape while extruding the sheath, avoiding the separate wrapping process in traditional methods, saving production time. Reducing this step lowers production costs, and equipment maintenance and operating expenses are also reduced. The tape is placed in the same direction as the sheath, minimizing sheath thickness issues caused by tape breakage and curling, thus improving the overall quality of the cable sheath. The multi-head winding frame and gathering mold 201 design allow for the simultaneous longitudinal wrapping of tapes of various widths, enhancing the mechanism's versatility. A system equipped with sensors and an alarm 202 ensures immediate alerts in case of tape breakage or deviation from the predetermined path, guaranteeing the continuity and safety of the production process.

[0039] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mechanism for longitudinally packaged straps, characterized in that, include: The reel device (100) includes a bracket (4) and a plurality of reel assemblies (1) disposed on the bracket (4). Each reel assembly (1) includes a support shaft (11) connected to the bracket (4), a tape reel (12) rotatably connected to the support shaft (11), and a tension adjusting component (13) for adjusting the tape tension of the tape reel (12). The gathering device (200) includes a gathering mold (201) for gathering the tapes released from the plurality of tape reels (12). The shaping device (300) includes a positioning guide tube (301) and an extrusion head connected thereto. The gathered tape enters the extrusion head through the positioning guide tube (301) and is extruded. It also includes a rotating sleeve (2) and a bushing (3). The rotating sleeve (2) is fitted onto the support shaft (11) and can rotate around the support shaft (11). The bushing (3) is fitted onto the rotating sleeve (2). The wrapping disc (12) is fitted onto the bushing (3). The tension adjustment assembly (13) includes a movable clamping plate (14), a fixed clamping plate (15), a cap (16), and an elastic damper (17). The movable clamping plate (14) is axially slidably fitted onto the rotating sleeve (2). The surfaces of the movable clamping plate (14) and the fixed clamping plate (15) are respectively able to rub against the wrapping disc (12). The elastic damper (17) abuts against the outer side of the movable clamping plate (14) to provide axial floating amount of the movable clamping plate (14). The cap (16) is threaded to the outer circle of the rotating sleeve (2) and abuts against the outer side of the fixed clamping plate (15) so that the fixed clamping plate (15) abuts against the bushing (3) and / or the wrapping disc (12). The elastic damper (17) includes an elastic element (171), a pressure block (172), and a pressure plate (173) that is axially slidably sleeved on the rotating sleeve (2). The elastic element (171) is used to provide the pressure block (172) to press against the pressure plate (173) so that the pressure plate (173) abuts against the movable clamp (14). The elastic damper (17) further includes a tension sleeve (174), an adjusting plate (175), and an adjusting handle (176). The elastic element (171) includes a helical spring. The adjusting plate (175) is disposed at one axial end of the tension sleeve (174). The adjusting handle (176) is threadedly connected to the adjusting plate (175). The pressure block (172) is slidably connected to the inner hole of the tension sleeve (174) and one end abuts against the pressure plate (173). The elastic element (171) abuts against the adjusting handle (176) and the pressure block (172) respectively.

2. The longitudinal packing strap mechanism according to claim 1, characterized in that, The rotating sleeve (2) is fitted with a limiting plate (18) on the side of the pressure plate (173) away from the movable clamping plate (14).

3. The longitudinal packing strap mechanism according to claim 1, characterized in that, The support shaft (11) has bearings (111) fitted at both ends of its axial direction. The rotating sleeve (2) is fitted on the support shaft (11) and rotates around the support shaft (11) through the bearings (111).

4. The longitudinal packing strap mechanism according to claim 1, characterized in that, The bracket (4) includes a base (41), a column (42), and a triangular reinforcing frame (43) connecting the base (41) and the column (42).

5. A longitudinal packing strap mechanism according to claim 4, characterized in that, The support shaft (11) is an optical axis, the support shaft (11) is connected to the column (42), and the tension sleeve (174) is connected to the column (42).

6. The longitudinal packing strap mechanism according to claim 1, characterized in that, The gathering mold (201) includes two freely opening and closing half molds, which form a ring. A sensing device is provided inside the ring and is connected to an alarm (202). When the strap breaks or deviates from the predetermined path, the alarm (202) issues an alarm.

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