Non-metallic thin strip longitudinal wrapping device

Abstract

The utility model provides a kind of non-metal thin type strip longitudinal wrapping device, it is related to the technical field of strip longitudinal wrapping of wire and cable, and it includes: support frame, adjusting plate, fixed plate and longitudinal wrapping mould;Adjusting plate is vertically connected on the top of support frame by full thread bolt and nut;Fixed plate is horizontally fixed on the top of adjusting plate by screw;Longitudinal wrapping mould is bent into half-pipe structure by metal plate, two sides are tapered along the direction of wire core advancement, end is contracted into circle, and is welded and fixed on fixed plate.The utility model is based on the tapered half-pipe structure of longitudinal wrapping mould, so that strip is forced to gather under wire core traction, and uniform covering without wrinkle is realized.

Description

Technical Field

[0001] This utility model relates to the field of longitudinal wrapping technology for wire and cable strips, and in particular to a longitudinal wrapping device for non-metallic thin strips. Background Technology

[0002] In the cable manufacturing industry, longitudinal wrapping is a process in which a strip of material is tightly wrapped along the length of the cable core. Common non-metallic strips such as non-woven fabric, fiberglass tape, and polyester tape play an important role in the production of various types of cables, including power cables, communication cables, and special cables, due to their unique electrical properties, good flexibility, excellent corrosion resistance, and environmental protection characteristics.

[0003] Non-metallic thin strips offer numerous advantages, but existing longitudinal wrapping devices are primarily designed for metal strips such as steel, copper, and aluminum. These traditional devices exhibit significant limitations when dealing with the soft and highly elastic nature of non-metallic thin strips. Because non-metallic thin strips are prone to deformation and wrinkling, they cannot be tightly and evenly wrapped around the cable core during longitudinal wrapping, resulting in poor wrapping performance and severely impacting cable quality and performance. Achieving stable and precise feeding and positioning of the strip during longitudinal wrapping of non-metallic thin strips is difficult. Furthermore, traditional longitudinal wrapping devices are complex in structure, with each transmission component typically relying on a power unit for drive. This not only leads to high equipment costs but also significant energy consumption, increasing operating costs during production. Such complex and costly equipment configurations are unsuitable for the longitudinal wrapping of non-metallic thin strips. Their complex structure also presents numerous inconveniences in operation and maintenance, reducing production efficiency and failing to meet the demands of modern cable production for high efficiency and low cost. Utility Model Content

[0004] In order to solve the above technical problems, this utility model provides a non-metallic thin strip longitudinal wrapping device, including: a support frame (1), an adjustment plate (2), a fixing plate (3) and a longitudinal wrapping mold (4).

[0005] The adjusting plate (2) is vertically connected to the support frame (1) above by a fully threaded bolt (5) and a nut (6); the fixing plate (3) is horizontally fixed to the adjusting plate (2) above by a screw (7); the longitudinal wrapping mold (4) is bent from a metal plate into a semi-tubular structure, with both sides gradually narrowing along the direction of the wire core, and the end shrinking into a circle, and is welded and fixed to the fixing plate (3).

[0006] Furthermore, the support frame (1) is welded together from four metal square tubes and a square metal plate, with the four metal square tubes fixed to the four corners of the square metal plate respectively.

[0007] Furthermore, the metal plate has mounting holes at its center and edges, and fully threaded bolts (5) pass through the mounting holes and are locked in both directions by upper and lower nuts (6).

[0008] Furthermore, the adjusting plate (2) is in the shape of a "Z", with a connecting hole at its lower end that matches the fully threaded bolt (5), and two pairs of screw mounting holes symmetrically opened at its upper end along the longitudinal direction.

[0009] Furthermore, the inner diameter of the end of the longitudinal wrapping die (4) is 0.1~0.2mm larger than the outer diameter of the wire core after longitudinal wrapping of the strip, and the outer diameter is 0.2~0.3mm smaller than the inner diameter of the extruder die core.

[0010] Furthermore, the inlet width of the longitudinal packaging mold (4) is greater than the outlet width, forming a gradually narrowing channel.

[0011] Furthermore, the angle of the tapered channel is 10°~15°.

[0012] Furthermore, the fixing plate (3) is welded to the longitudinal packaging mold (4) to form a detachable module.

[0013] Compared with the prior art, the non-metallic thin strip longitudinal wrapping device provided by this utility model has the following beneficial effects:

[0014] This invention is based on a tapered semi-tubular structure of a longitudinal wrapping mold. The non-metallic strip gradually shrinks along the direction of the wire core under the traction of the wire core, and the end shrinks into a circle. The tapered channel applies normal pressure to the strip and the traction force of the wire core in synergy, forcing the non-metallic strip to be uniformly gathered and attached to the wire core. This solves the problem that existing longitudinal wrapping devices are prone to wrinkles when longitudinally wrapping thin non-metallic strips, resulting in uneven wrapping, and achieves wrinkle-free uniform wrapping. Attached Figure Description

[0015] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0016] Figure 1 This is a schematic diagram of the overall structure of the longitudinal wrapping device in a specific embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the longitudinal wrapping mold in a specific embodiment of the present utility model;

[0018] Figure 3 This is a side view of the longitudinal packaging device in a specific embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram illustrating the working principle in a specific embodiment of the present invention.

[0020] In the diagram: 1. Support frame; 2. Adjusting plate; 3. Fixing plate; 4. Longitudinal wrapping mold; 5. Fully threaded bolt; 6. Nut; 7. Screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1-3 The present invention provides a non-metallic thin strip longitudinal wrapping device, comprising: a support frame (1), an adjusting plate (2), a fixing plate (3), and a longitudinal wrapping mold (4); the longitudinal wrapping device provided by the present invention has a simple structure, consisting of only a support frame, an adjusting plate, a fixing plate, a longitudinal wrapping mold, bolts, nuts, screws, etc., with low production cost and easy installation and maintenance.

[0023] The adjusting plate (2) is vertically connected to the support frame (1) above by a fully threaded bolt (5) and a nut (6); the fixing plate (3) is horizontally fixed to the adjusting plate (2) above by a screw (7); the longitudinal wrapping mold (4) is bent from a metal plate into a semi-tubular structure, with both sides gradually narrowing along the direction of the wire core, and the end shrinking into a circle, and is welded and fixed to the fixing plate (3).

[0024] The non-metallic thin strip adopts a non-powered release method, which is driven by the longitudinally wrapped wire core to enter the longitudinal wrapping mold and extruder head simultaneously, realizing stable and accurate feeding and positioning of the strip, and effectively reducing energy consumption and production costs.

[0025] Specifically, the support frame (1) is welded together from four metal square tubes and a square metal plate, with the four metal square tubes fixed to the four corners of the square metal plate. Based on the welded structure of the four square tubes and the square metal plate, a stable support base is provided to prevent the strip from shifting due to device vibration.

[0026] Specifically, the metal plate has mounting holes at its center and edges. Fully threaded bolts (5) pass through the mounting holes and are locked in both directions by upper and lower nuts (6). The dual-point locking design of the fully threaded bolts (5) passing through the center hole and the edge hole enhances the anti-torsion ability and prevents the adjusting plate (2) from shaking.

[0027] Specifically, the adjusting plate (2) is in the shape of a "Z", with a connecting hole at the lower end that matches the fully threaded bolt (5), and two pairs of screw mounting holes symmetrically opened at the upper end along the longitudinal direction.

[0028] Specifically, the inner diameter of the end of the longitudinal wrapping die (4) is 0.1~0.2mm larger than the outer diameter of the wire core after longitudinal wrapping of the strip, and the outer diameter is 0.2~0.3mm smaller than the inner diameter of the extruder die core. The outlet is slightly larger than the wrapped wire core to ensure smooth passage without jamming; it is slightly smaller than the extruder inlet to ensure precise positioning and that the wrapped wire core can smoothly enter the next process.

[0029] Specifically, the inlet width of the longitudinal wrapping die (4) is greater than the outlet width, forming a tapered channel with an inclination angle of 10°~15° to ensure a balanced tapering force. If the angle is too large, the strip is prone to jamming; if it is too small, it is prone to wrinkling. The strip is subjected to the combined action of normal pressure and core traction force on the tapered surface. The pressure component causes the strip to adhere to the core, while the traction component overcomes the frictional resistance. The longitudinal wrapping die is formed by gradually bending a metal plate. During longitudinal wrapping, the non-metallic thin strip gradually adheres to the core under the constraint of the longitudinal wrapping die and enters the extruder simultaneously, resulting in a tight, uniform, and wrinkle-free wrapping, thus ensuring the quality of the product.

[0030] Specifically, the installation requirements for the non-metallic thin strip longitudinal wrapping device provided by this utility model are as follows: The longitudinal wrapping mold (4) must be on the same horizontal axis as the extruder head. The thin strip unwinding frame is located on the side of the wire core, and the unwinding direction is at an angle of 10° to 45° with the wire core's forward direction. By coaxially setting the longitudinal wrapping mold, unwinding frame, and extruder, and combining the wire core's movement to pull the non-metallic strip, stable feeding and precise positioning of the non-metallic strip under no-power drive are achieved, effectively reducing energy consumption and lowering production costs.

[0031] Specifically, the fixing plate (3) and the longitudinal packaging mold (4) are welded together to form a detachable module. By removing the screws (7), replacing the fixing plate with the mold of the corresponding diameter, and then tightening the screws, the longitudinal packaging mold can be quickly replaced to adapt to different wire diameters, avoiding production line shutdown caused by the overall disassembly of traditional equipment.

[0032] In one specific embodiment, the method for longitudinally wrapping the wire core of non-metallic thin strip includes a support frame (1), an adjustment plate (2) mounted on the support frame (1), a fully threaded bolt (5) and a nut (6) connecting the support frame (1) and the adjustment plate (2), a fixing plate (3) fixed on the adjustment plate (2), screws (7), and a longitudinal wrapping mold (4) welded to the fixing plate (3).

[0033] The support frame (1) is welded together from four metal square tubes and a metal plate. A hole is drilled at the center and edge of the metal plate for installing fully threaded bolts (5). The fully threaded bolts (5) are fixed to the support frame (1) by tightening the nuts (6) at the top and bottom.

[0034] The adjusting plate (2) is in the shape of a "Z". A hole is drilled at the lower end of the adjusting plate and at the edge. The plate is then fixed to the threaded bolt (5) by locking the upper and lower nuts (6). Two holes are drilled on the left and right sides of the upper end of the adjusting plate along the longitudinal wrapping direction. The fixing plate (3) is then fixed to the adjusting plate with screws (7). The height of the fixing plate (3) can be adjusted by adjusting the threaded bolt (5), thereby adjusting the height of the longitudinal wrapping mold (4).

[0035] The fixing plate (3) has two holes drilled on each side at the corresponding positions and is fixed with screws (7). The longitudinal wrapping mold (4) is firmly welded to the fixing plate (3) by welding technology. The longitudinal wrapping mold (4) is made of bent metal plate. The two sides of the metal plate gradually converge along the direction of the wire core, and the end shrinks into a circle. The inner diameter of the end is 0.1 to 0.2 mm larger than the outer diameter of the wire core after longitudinal wrapping the strip, and the outer diameter is 0.2 to 0.3 mm smaller than the inner diameter of the extruder mold core.

[0036] By replacing the fixing plate welded with longitudinal wrapping molds of different diameters, the needs of wire cores with different outer diameters in longitudinal wrapping can be met.

[0037] The working principle of this utility model:

[0038] like Figure 4 After being released from the unwinding rack, the non-metallic thin strip is drawn into the longitudinal wrapping die by the moving wire core. The strip is forcibly gathered within the die's tapering channel, tightly adhering to the wire core surface to form a wrinkle-free longitudinal wrapping layer. The wrapped wire core and strip exit together from the end of the longitudinal wrapping die and directly enter the extruder head for subsequent processing. Throughout this process, the strip is not powered; its movement relies entirely on the traction force of the wire core. Furthermore, the inner diameter of the die end is 0.1–0.2 mm larger than the outer diameter of the wrapped wire core, ensuring smooth passage of the wrapping layer without loosening.

[0039] In the description of this specification, the terms "connection", "installation", "fixing", "setting", etc. are interpreted in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A longitudinal wrapping device for non-metallic thin strips, characterized in that, include: Support frame (1), adjusting plate (2), fixing plate (3) and longitudinal wrapping mold (4); The adjusting plate (2) is vertically connected to the support frame (1) above by fully threaded bolts (5) and nuts (6); the fixing plate (3) is horizontally fixed to the adjusting plate (2) above by screws (7); the longitudinal packaging mold (4) is made of metal plate bent into a semi-tubular structure, with both sides gradually narrowing along the direction of the wire core, and the end shrinking into a circle, and is welded and fixed to the fixing plate (3).

2. The non-metallic thin strip longitudinal wrapping device as described in claim 1, characterized in that, The support frame (1) is welded together from four metal square tubes and a square metal plate. The four metal square tubes are fixed to the four corners of the square metal plate respectively.

3. The non-metallic thin strip longitudinal wrapping device as described in claim 2, characterized in that, The metal plate has mounting holes at its center and edge. The fully threaded bolt (5) passes through the mounting holes and is locked in both directions by the upper and lower nuts (6).

4. The non-metallic thin strip longitudinal wrapping device as described in claim 1, characterized in that, The adjusting plate (2) is in the shape of "Z", with a connecting hole at the lower end that matches the threaded bolt (5) and two pairs of screw mounting holes symmetrically opened at the upper end along the longitudinal direction.

5. The non-metallic thin strip longitudinal wrapping device as described in claim 1, characterized in that, The inner diameter of the end of the longitudinal wrapping die (4) is 0.1~0.2mm larger than the outer diameter of the wire core after longitudinal wrapping of the strip, and the outer diameter is 0.2~0.3mm smaller than the inner diameter of the extruder die core.

6. The non-metallic thin strip longitudinal wrapping device as described in claim 1, characterized in that, The inlet width of the longitudinal packaging mold (4) is greater than the outlet width, forming a gradually narrowing channel.

7. The non-metallic thin strip longitudinal wrapping device as described in claim 6, characterized in that, The angle of inclination of the tapering channel is 10°~15°.

8. The non-metallic thin strip longitudinal wrapping device as described in claim 1, characterized in that, The fixing plate (3) is welded to the longitudinal packaging mold (4) to form a detachable module.

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