A device for winding a clara tube

Abstract

The application relates to a winding device for a clark tube, which comprises a rack, two mounting plates, two positioning assemblies and a combination assembly for combining spiral ribs to a tube, the two mounting plates are distributed along the length direction of the tube, the positioning assembly comprises a driving roller, a driving motor, two matching rollers, two sliding blocks and an adjusting piece, the length direction of the driving roller and the two matching rollers is parallel to the length direction of the tube, the driving motor is used for driving the driving roller to rotate, the sliding blocks are slidably connected to the mounting plates in the direction of approaching or moving away from the driving roller, the matching rollers are rotatably connected to the sliding blocks, the driving roller and the two matching rollers are distributed according to the vertex positions of a triangle, the adjusting piece is used for changing the distance between the sliding blocks and the axis of the driving roller, and the driving roller and the matching rollers abut against the inner side wall of the tube. The winding device can adapt to tubes with different diameters, the jumping of the tube during rotation is reduced, and the combination quality of the spiral ribs is improved.

Description

Technical Field

[0001] This application relates to the field of manufacturing carat tubes, and more particularly to a winding device for carat tubes. Background Technology

[0002] Krah tubes typically refer to reinforced spiral wound structured wall tubes made of high-density polyethylene. In the industrial production process, the inner tube, outer tube, and spiral ribs are first extruded by three extruders. Organic fiber woven mesh is wound around the outer wall of the inner tube. The molten outer tube is then fitted onto the organic fiber woven mesh to form the tube. Next, the molten spiral ribs are wound onto the tube by a winding device. Finally, the finished Krah tube is obtained through a cooling and shaping system.

[0003] The Chinese utility model patent with publication number CN222844760U discloses a hollow wall tube winding device, including an equipment box. A mounting plate is fixedly connected to one side of the equipment box, a rotating seat is rotatably connected to one side of the mounting plate, a winding mold is fixedly connected to one side of the rotating seat, a support plate is fixedly connected to one side of the mounting plate, and a box body is fixedly connected to one side of the support plate. Circular through grooves are provided on both sides of the box body. This embodiment has the effect of saving water resources and improving work efficiency.

[0004] Because the pipes come in various sizes and specifications, it is impossible to position pipes of different diameters using only a single-size winding mold. This can cause the pipes to bounce during rotation, which in turn changes the contact position of the spiral ribs. This change in the connection position of the spiral ribs will result in poor quality of the kraft pipes. Utility Model Content

[0005] In order to enable the winding device to adapt to pipes of different diameters, reduce the jumping of the pipes during rotation, and thus improve the bonding quality of the spiral ribs, this application provides a winding device for carbide pipes.

[0006] The present application provides a winding device for a carat tube, which adopts the following technical solution: A winding device for a corrugated tube includes a frame, two mounting plates, two positioning components, and a bonding component for attaching helical ribs to the tube. The two mounting plates are distributed along the length of the tube, and the two positioning components correspond to the two mounting plates. Each positioning component includes a drive roller, a drive motor, two mating rollers, two sliding blocks, and an adjusting component. The length directions of the drive roller and the two mating rollers are parallel to the length direction of the tube. The drive motor drives the drive roller to rotate. The two mating rollers correspond to the two sliding blocks, which are slidably connected to the mounting plates in a direction close to or away from the drive rollers. The mating rollers are rotatably connected to the sliding blocks. The drive roller and the two mating rollers are distributed at the vertices of a triangle. The adjusting component changes the distance between the sliding blocks and the axis of the drive roller. Both the drive roller and the mating rollers abut against the inner wall of the tube. One mounting plate is mounted on the frame, and the other mounting plate is slidably connected to the frame along the length of the tube. The frame is equipped with a control component for controlling the distance between the two mounting plates.

[0007] By adopting the above technical solution, two mounting plates are set along the length of the pipe, and one of the mounting plates can slide and connect to the frame along the length of the pipe. The distance between the two mounting plates can be adjusted with the control components. At the same time, the positioning components on each mounting plate adopt a structure in which the drive roller and two mating rollers are distributed in a triangle. With the adjustment components, the distance between the sliding block and the axis of the drive roller is changed, so that the drive roller and mating roller can be adapted to pipes of different diameters and abut against the inner wall of the pipe, realizing stable positioning of pipes of different sizes, avoiding jumping when the pipe rotates, and thus ensuring that the spiral rib can be accurately attached to the pipe, ensuring the quality of the kraft pipe. At the same time, the drive motor drives the drive roller to rotate, which can drive the pipe to rotate stably, providing stable conditions for the winding of the spiral rib. The attachment components can smoothly attach the spiral rib to the pipe, ensuring that the winding process is carried out in an orderly manner.

[0008] Optionally, the adjusting component includes an adjusting frame, a screw, and an adjusting motor. The adjusting frame is slidably connected to the mounting plate along the direction from the drive roller to the midpoint of the line connecting the two mating rollers. Both sliding blocks are slidably connected to the adjusting frame in the horizontal direction. The length direction of the screw is parallel to the sliding direction of the adjusting frame. The screw is rotatably connected to the mounting plate. The adjusting frame is threadedly connected to the screw. The adjusting motor is used to drive the screw to rotate.

[0009] By adopting the above technical solution, the adjusting frame slides along the midpoint of the line connecting the drive roller and the two mating rollers and is connected to the mounting plate. The two sliding blocks slide horizontally and are connected to the adjusting frame. The adjusting motor drives the screw to rotate, causing the adjusting frame threaded to the screw to move, which in turn drives the sliding blocks and mating rollers to move. This adjustment method can accurately control the distance between the mating roller and the drive roller, further improving the accuracy of positioning pipes of different diameters, ensuring the stability of the pipes during rotation, reducing the problem of changes in the spiral rib joint position caused by positioning deviation, and ensuring the production quality of kraft pipes.

[0010] Optionally, the control component includes a plug rod and a handle. The handle is mounted on a slidable mounting plate. The frame has a plurality of insertion holes distributed along the length of the tube. The tail of the plug rod passes through the slidable mounting plate and is inserted into the insertion hole.

[0011] By adopting the above technical solution, the handle facilitates the operator's operation of the sliding mounting plate. Several insertion holes opened on the frame along the length of the pipe allow the distance between the two mounting plates to be quickly adjusted when the insertion rod passes through the sliding mounting plate and is inserted into different insertion holes. This adapts to pipes of different lengths or with different positioning requirements, making operation convenient and efficient. It also improves the flexibility of the device in positioning the pipe, indirectly ensuring the stability of the spiral rib winding and helping to guarantee the quality of the kraft pipe.

[0012] Optionally, both the drive roller and the mating roller are provided with an anti-slip layer.

[0013] By adopting the above technical solution, an anti-slip layer is set on the drive roller and the mating roller, which can increase the friction between the drive roller, the mating roller and the inner wall of the tube, avoid relative sliding of the tube during the driving rotation or positioning process, further improve the stability of the tube when rotating, prevent the tube from jumping due to sliding, ensure the accurate connection position of the spiral rib, and guarantee the production quality of the kraft tube.

[0014] Optionally, the bonding assembly includes a bonding frame, a movable component, a guide component, and a heating component. The bonding frame is slidably connected to the frame along the length of the pipe. The movable component is used to drive the bonding frame to move. The guide component is used to guide the spiral ribs to adhere to the surface of the pipe. The heating component is used to heat the sidewall of the spiral ribs adhering to the pipe to a molten state.

[0015] By adopting the above technical solution, the connecting frame slides along the length of the pipe and is connected to the machine frame. The moving part drives the connecting frame to move, which allows the guide and heating parts to adapt to the spiral rib winding requirements at different positions of the pipe. The guide can guide the spiral rib to accurately fit onto the pipe surface, and the heating part heats the side wall of the spiral rib to a molten state, ensuring that the spiral rib and the pipe are stably bonded. This avoids affecting the quality of the kraft pipe due to inaccurate fitting or weak bonding, and improves the reliability of spiral rib winding.

[0016] Optionally, the connecting frame includes a base, an operating frame, and a cylinder. The base is slidably connected to the frame along the length of the pipe. The cylinder is vertically arranged, with its cylinder body located on the base. The operating frame is slidably connected to the base and is located on the piston rod of the cylinder. The guide and heating elements are both located on the operating frame.

[0017] By adopting the above technical solution, during loading, the control cylinder raises the operating frame, avoiding the placement path of the tube to be processed and freeing up enough space to facilitate the precise placement of the tube between the drive roller and the mating roller of the positioning component. During operation, the control cylinder lowers the frame, facilitating the positioning of the guide and heating components. During unloading, since the tube is already wrapped with spiral ribs, without the cylinder, the guide and heating components would be fixed in the working position, forming a spatial obstruction with the spiral ribs on the outer wall of the tube, making it impossible to remove the tube. However, the cylinder-driven operating frame can avoid the tube and spiral ribs, ensuring the finished product can be removed smoothly. Ultimately, this simplifies the loading and unloading process and ensures the smooth operation of the corrugated tube winding production.

[0018] Optionally, the moving component includes a moving screw and a moving motor. The length direction of the moving screw is parallel to the length direction of the pipe. The moving screw is rotatably connected to the frame. The base is threadedly connected to the moving screw. The moving motor is used to drive the moving screw to rotate.

[0019] By adopting the above technical solution, the base of the threaded connection to the moving screw is moved. This driving method can precisely control the moving speed and displacement of the base, thereby achieving precise movement of the connecting frame along the length of the pipe. This ensures that the guide and heating elements can accurately correspond to the position where the spiral ribs need to be wound on the pipe, avoiding inaccurate spiral rib winding position due to movement deviation, improving the accuracy of spiral rib winding, and ensuring the production quality of the kraft pipe. The rotation of the pipe and the conveying of the spiral ribs along the length of the pipe enable the spiral ribs to be installed on the surface of the pipe in a spiral shape.

[0020] Optionally, the guide includes a guide wheel, a tensioning wheel, an abutting wheel, an abutting block, and a spring. The abutting block is located above the drive roller and is vertically slidably connected to the operating frame. The spring is used to press the abutting wheel against the side wall of the pipe. The guide wheel and the tensioning wheel are distributed along the feeding direction of the spiral rib. Both the guide wheel and the tensioning wheel are rotatably connected to the operating frame. The guide wheel, the tensioning wheel, and the abutting wheel cause the spiral rib to be transported in a zigzag pattern. The heating element is a plurality of heating rods. The heating rods are used to heat the side wall of the spiral rib that passes around the tensioning wheel to a molten state.

[0021] By adopting the above technical solution, the abutment block is vertically slidably connected to the operating frame, and the spring keeps the abutment wheel pressed against the side wall of the pipe. This can adapt to pipes of different diameters and maintain a tight abutment state, ensuring the stability of the pipe during the winding process. The guide wheel and tensioning wheel are distributed along the feeding direction of the spiral rib and are rotatably connected to the operating frame, so that the spiral rib is transported in a zigzag shape. This can guide and tighten the spiral rib, preventing the spiral rib from loosening and causing inaccurate fitting. The heating element consists of several heating rods, which heat the side wall of the spiral rib and the pipe at the point where it passes the tensioning wheel to a molten state, ensuring precise heating position, improving the bonding effect between the spiral rib and the pipe, and further ensuring the quality of the kraft pipe. At the same time, the combination of zigzag transportation and precise heating can keep the spiral rib in a taut state, improve the straightness of the spiral rib, and ensure the high efficiency and stability of the winding process.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By adjusting the distance between the mating roller and the drive roller in the positioning assembly and adjusting the distance between the two mounting plates, it can adapt to pipes of different diameters and positioning requirements, avoid pipe rotation and jumping, and ensure the precise engagement position of the spiral ribs. The bonding component guides the spiral ribs to fit the pipe, and the heating element heats the bonding surface to a molten state. It can also be adapted to different parts of the pipe by adjusting the height of the bonding frame and moving the position of the bonding frame, thereby improving the bonding reliability between the spiral ribs and the pipe. The control components facilitate quick adjustment of the mounting plate spacing, the cylinder-driven lifting and lowering of the operating frame eliminates obstacles to pipe loading and unloading, the anti-slip layer prevents pipe slippage, and the overall operation process is simplified to ensure continuous and efficient production of corrugated pipe winding. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the winding device for a carat tube.

[0024] Figure 2 yes Figure 1 A schematic diagram of the positioning component.

[0025] Figure 3 yes Figure 1 A schematic diagram of the combined components.

[0026] Reference numerals: 1. Frame; 11. Insertion hole; 2. Mounting plate; 3. Positioning assembly; 31. Drive roller; 32. Drive motor; 33. Matching roller; 331. Anti-slip layer; 34. Sliding block; 35. Adjusting component; 351. Adjusting frame; 352. Screw; 353. Adjusting motor; 4. Connecting assembly; 41. Connecting frame; 411. Base; 412. Operating frame; 413. Cylinder; 42. Moving component; 421. Moving screw; 422. Moving motor; 43. Guide component; 431. Guide wheel; 432. Tensioning wheel; 433. Abutment wheel; 434. Abutment block; 435. Spring; 44. Heating component; 5. Control component; 51. Insert rod; 52. Handle; 6. Tube; 7. Spiral rib. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0028] This application discloses a winding device for a carat tube. (See also...) Figure 1 and Figure 2 A winding device for a corrugated tube includes a frame 1, two mounting plates 2, two positioning components 3, and a connecting component 4. The two mounting plates 2 are along the length of the tube 6, one of which is fixedly mounted on the frame 1, and the other is slidably connected to the frame 1 along the length of the tube 6. The two positioning components 3 correspond to the two positioning plates and are used to fix the two ends of the tube 6 respectively. The connecting component 4 is mounted on the frame 1 and is used to connect the spiral ribs 7 to the tube 6.

[0029] Reference Figure 1 and Figure 2 The frame 1 is equipped with a control component 5, which is used to adjust the position of the movable mounting plate 2. The control component 5 includes a plug rod 51 and a handle 52. The handle 52 is fixedly mounted on the slidable mounting plate 2. The frame 1 has a plurality of plug holes 11, which are evenly distributed along the length of the pipe 6. The plug rod 51 is vertically mounted, and the tail end of the plug rod 51 passes through the mounting plate 2 and is inserted into the plug hole 11.

[0030] Reference Figure 1 and Figure 2The positioning component 3 includes a drive roller 31, a drive motor 32, two mating rollers 33, two sliding blocks 34, and an adjusting component 35. The drive roller 31 and the mating rollers 33 are located between two mounting plates 2. The axes of the drive roller 31 and the mating rollers 33 are parallel to the length direction of the pipe 6. The drive roller 31 and the mating rollers 33 are arranged in an equilateral triangle. The height of the drive roller 31 is higher than the height of the mating rollers 33. The drive roller 31 is rotatably connected to the mounting plate 2. The two sliding blocks 34 correspond to the two mating rollers 33. The sliding blocks 34 slide along the hypotenuse of the equilateral triangle and are connected to the mounting plate 2. The mating rollers 33 are rotatably connected to the sliding blocks 34. The surfaces of the drive roller 31 and the mating rollers 33 are fixedly provided with anti-slip layers 331. The drive motor 32 is fixedly mounted on the mounting plate 2. The output shaft of the drive motor 32 is fixedly connected to one end of the drive roller 31. The adjusting component 35 is used to change the distance between the mating rollers 33 and the drive roller 31.

[0031] Reference Figure 1 and Figure 2 The adjusting component 35 includes an adjusting frame 351, a screw 352, and an adjusting motor 353. The adjusting frame 351 is slidably connected to the mounting plate 2 in the vertical direction. Two sliding blocks 34 are slidably connected to the adjusting frame 351 in the horizontal direction. The length direction of the screw 352 is parallel to the length direction of the adjusting frame 351. The screw 352 is rotatably connected to the mounting plate 2. The adjusting frame 351 is threadedly connected to the screw 352. The adjusting motor 353 is fixedly mounted on the mounting plate 2. The output shaft of the adjusting motor 353 is fixedly connected to one end of the screw 352.

[0032] Reference Figure 2 and Figure 3 The assembly 4 includes a connecting frame 41, a moving part 42, a guide part 43, and a heating part 44. The connecting frame 41 includes a base 411, an operating frame 412, and a cylinder 413. The base 411 is slidably connected to the frame 1 along the length of the pipe 6. The moving part 42 includes a moving screw 421 and a moving motor 422. The length of the moving screw 421 is parallel to the sliding direction of the base 411. The moving screw 421 is rotatably connected to the frame 1. The base 411 is threadedly connected to the moving screw 421. The operating frame 412 is slidably connected to the base 411 along the vertical direction. The cylinder 413 is vertically arranged. The cylinder body of the cylinder 413 is fixedly arranged on the base 411, and the piston rod of the cylinder 413 is fixedly arranged on the operating frame 412.

[0033] Reference Figure 2 and Figure 3The guide component 43 includes a guide wheel 431, a tensioning wheel 432, an abutment wheel 433, an abutment block 434, and a spring 435. The axis of the abutment wheel 433 is parallel to the axis of the drive roller 31, and the abutment wheel 433 is located directly above the drive roller 31. The abutment block 434 is slidably connected to the operating frame 412 in the vertical direction, and the abutment wheel 433 is rotatably connected to the abutment block 434. The abutment wheel is used to abut against the outer wall of the pipe 6. The spring 435 is vertically arranged, with one end of the spring 435 fixedly mounted on the abutment block 434 and the other end of the spring 435 fixedly mounted on the operating frame 412. The spring 435 is used to protect the abutment wheel 433. The guide wheel 431 and tension wheel 432 are distributed along the feeding direction of the spiral rib 7 and are in contact with the surface of the pipe 6. The axis of the guide wheel 431 and the axis of the tension wheel 432 are parallel to the axis of the abutment wheel 433. The guide wheel 431 and the tension wheel 432 are rotatably connected to the operating frame 412. The guide wheel 431, the tension wheel 432 and the abutment wheel 433 transport the spiral rib 7 in a zigzag shape. The heating element 44 consists of several heating rods, which are distributed along the axis of the tension wheel 432. The heating rods are located on the side of the spiral rib 7 away from the tension wheel 432. The heating rods are used to heat the spiral rib 7 to the side wall of the pipe 6 to a molten state.

[0034] The implementation principle of the winding device for a corrugated tube according to the present application is as follows: When the device is working, the distance between the two mounting plates 2 is first adjusted by the control component 5: the operator holds the handle 52 and pushes the sliding mounting plate 2 to move it along the length of the tube 6 to the appropriate position, and then inserts the insertion rod 51 through the mounting plate 2 into the insertion hole 11 of the frame 1 to fix the position of the mounting plate 2, thus providing a basis for positioning tubes 6 of different lengths.

[0035] The positioning component 3 positions the pipe 6 through a triangular distribution structure of the drive roller 31 and two mating rollers 33: the adjusting motor 353 drives the screw 352 to rotate, causing the threaded adjusting frame 351 to slide vertically, which in turn drives the two sliding blocks 34 horizontally connected to the adjusting frame 351 to move synchronously, changing the distance between the mating roller 33 and the drive roller 31 to adapt to pipes 6 of different diameters; the anti-slip layer 331 on the surface of the drive roller 31 and the mating roller 33 enhances the friction with the inner wall of the pipe 6. When the drive motor 32 drives the drive roller 31 to rotate, it can drive the pipe 6 to rotate stably, avoiding jumping or sliding during rotation.

[0036] The spiral rib 7 is joined to the tube 6 by the assembly 4. The moving motor 422 drives the moving screw 421 to rotate, so that the threaded base 411 slides along the length of the tube 6, and the working position of the joining frame 41 is adjusted. In the guide 43, the spring 435 pushes the abutment block 434 to make the abutment wheel 433 press against the surface of the tube 6. The guide wheel 431 and the tensioning wheel 432 guide the spiral rib 7 to be transported in a zigzag shape and kept in a taut state. The heating rod heats the side wall of the spiral rib 7 that is about to be joined to the tube 6 to a molten state, so as to ensure that the spiral rib 7 can be accurately and firmly wound and joined to the surface of the tube 6 during the rotation of the tube 6, and finally completes the winding process of the carat tube.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A winding device for a carat tube, characterized in that: The assembly includes a frame (1), two mounting plates (2), two positioning components (3), and a connecting component (4) for attaching the spiral rib (7) to the tube (6). The two mounting plates (2) are distributed along the length of the tube (6), and the two positioning components (3) correspond to the two mounting plates (2). The positioning components (3) include a drive roller (31), a drive motor (32), two mating rollers (33), two sliding blocks (34), and an adjusting component (35). The length of the drive roller (31) and the two mating rollers (33) is parallel to the length of the tube (6). The drive motor (32) is used to drive the drive roller (31) to rotate. The two mating rollers (33) correspond to the two sliding blocks (34), and the sliding blocks (34) are positioned along the tube. The drive roller (31) is slidably connected to the mounting plate (2) in the direction of being close to or away from the drive roller (31). The mating roller (33) is rotatably connected to the sliding block (34). The drive roller (31) and the two mating rollers (33) are distributed according to the vertex position of the triangle and the height of the drive roller (31) is higher than the height of the mating roller (33). The adjusting component (35) is used to change the distance between the sliding block (34) and the axis of the drive roller (31). The drive roller (31) and the mating roller (33) both abut against the inner side wall of the tube (6). One mounting plate (2) is installed on the frame (1), and the other mounting plate (2) is slidably connected to the frame (1) along the length direction of the tube (6). The frame (1) is provided with a control component (5) to control the distance between the two mounting plates (2).

2. The winding device for a carat tube according to claim 1, characterized in that: The adjusting component (35) includes an adjusting frame (351), a screw (352), and an adjusting motor (353). The adjusting frame (351) is slidably connected to the mounting plate (2) along the direction from the drive roller (31) to the midpoint of the line connecting the two mating rollers (33). Two sliding blocks (34) are slidably connected to the adjusting frame (351) in the horizontal direction. The length direction of the screw (352) is parallel to the sliding direction of the adjusting frame (351). The screw (352) is rotatably connected to the mounting plate (2). The adjusting frame (351) is threadedly connected to the screw (352). The adjusting motor (353) is used to drive the screw (352) to rotate.

3. The winding device for a carat tube according to claim 1, characterized in that: The control component (5) includes a plug rod (51) and a handle (52). The handle (52) is mounted on a slidable mounting plate (2). The frame (1) has several insertion holes (11) distributed along the length of the pipe (6). The tail of the plug rod (51) passes through the slidable mounting plate (2) and is inserted into the insertion hole (11).

4. The winding device for a carat tube according to claim 1, characterized in that: Both the drive roller (31) and the mating roller (33) are provided with anti-slip layers (331).

5. The winding device for a carat tube according to claim 1, characterized in that: The bonding assembly (4) includes a bonding frame (41), a moving part (42), a guide part (43), and a heating part (44). The bonding frame (41) is slidably connected to the frame (1) along the length of the pipe (6). The moving part (42) is used to drive the bonding frame (41) to move. The guide part (43) is used to guide the spiral rib (7) to adhere to the surface of the pipe (6). The heating part (44) is used to heat the side wall of the spiral rib (7) adhering to the pipe (6) to a molten state.

6. The winding device for a carat tube according to claim 5, characterized in that: The connecting frame (41) includes a base (411), an operating frame (412), and a cylinder (413). The base (411) is slidably connected to the frame (1) along the length of the pipe (6). The cylinder (413) is vertically arranged, and the cylinder body of the cylinder (413) is located on the base (411). The operating frame (412) is slidably connected to the base (411) and is located on the piston rod of the cylinder (413). The guide (43) and the heating element (44) are both located on the operating frame (412).

7. A winding device for a carat tube according to claim 6, characterized in that: The moving part (42) includes a moving screw (421) and a moving motor (422). The length direction of the moving screw (421) is parallel to the length direction of the pipe (6). The moving screw (421) is rotatably connected to the frame (1). The base (411) is threadedly connected to the moving screw (421). The moving motor (422) is used to drive the moving screw (421) to rotate.

8. A winding device for a carat tube according to claim 6, characterized in that: The guide (43) includes a guide wheel (431), a tensioning wheel (432), an abutment wheel (433), an abutment block (434), and a spring (435). The abutment block (434) is located above the drive roller (31) and is vertically slidably connected to the operating frame (412). The spring (435) is used to press the abutment wheel (433) against the side wall of the pipe (6). The guide wheel (431) and the tensioning wheel (432) are connected to the drive roller (31). 32) Distributed along the feeding direction of the spiral rib (7), the guide wheel (431) and tension wheel (432) are rotatably connected to the operating frame (412). The guide wheel (431), tension wheel (432) and abutment wheel (433) make the spiral rib (7) transported in a zigzag shape. The heating element (44) consists of several heating rods. The heating rods are used to heat the spiral rib (7) around the tension wheel (432) to the side wall of the pipe (6) to a molten state.

Images