A bellows forming machine

Abstract

The application relates to a corrugated pipe forming machine which comprises a rack, two transmission belts, a plurality of forming modules and a driving piece, the transmission belts are rotationally connected to the rack, the two transmission belts are parallel to each other, the plurality of forming modules are arranged on the transmission belts, the forming modules between the two transmission belts can form corrugated ring grooves for pipe embryo adhesion, the driving piece is used for driving the forming modules to move, a limiting piece is arranged on the forming module, the limiting piece comprises a limiting rod, a pushing rod and a reset spring, the pushing rod is slidably connected to the corresponding forming module along the distribution direction of the two transmission belts, the limiting rod is slidably connected to the corresponding forming module along the length direction of the transmission belt, limiting grooves are arranged on the adjacent forming modules, one end of the limiting rod is used for clamping in the limiting groove, a guide inclined surface for guiding the limiting rod to move towards the limiting groove is arranged on the pushing rod, and the reset spring is used for the limiting rod to be separated from the limiting groove. The application has the effect of improving the production quality of the corrugated pipe.

Description

Technical Field

[0001] This application relates to the field of corrugated pipe manufacturing, and more particularly to a corrugated pipe forming machine. Background Technology

[0002] A corrugated pipe forming machine is a core piece of equipment specifically designed for the production of corrugated pipes.

[0003] The corrugated pipe forming machine includes a frame, several forming modules, and two drive belts. The two drive belts are parallel to each other and are rotatably connected to the frame. The several forming modules are distributed along the circumference of the drive belts and are fixedly installed on the drive belts by bolts.

[0004] During the operation of the molding machine, two transmission belts correspond to two molding modules that abut against each other to form a ring. The tube blanks entering the molding machine are then pressed into the grooves of the molding modules by internal pressure blowing. The tube blanks replicate the corrugated shape of the molding modules to form a corrugated pipe.

[0005] During the production process, after long-term use, the connecting parts such as the positioning pins and screw holes of the molding module will wear out, such as the positioning pins becoming loose or the threads becoming stripped. This causes the module to be unstable when fixed on the chain or drive belt, resulting in misalignment and failure to ensure that it is on the same straight line. As a result, the bellows will have burrs or leaks, and the quality of the bellows will be poor. Utility Model Content

[0006] To improve the production quality of corrugated pipes, this application provides a corrugated pipe forming machine.

[0007] This application provides a corrugated pipe forming machine, which adopts the following technical solution: A corrugated pipe forming machine includes a frame, two drive belts, several forming modules, and a drive component. The drive belts are rotatably connected to the frame, and the two drive belts are parallel to each other. Several forming modules are disposed on the drive belts. The forming modules located between the two drive belts can form corrugated annular grooves for pipe blank bonding. The drive component is used to drive the forming modules to move. Each forming module is provided with a limiting component, which includes a limiting rod, a pushing rod, and a return spring. The pushing rod slides along the distribution direction of the two drive belts and is connected to the corresponding forming module. The limiting rod slides along the length direction of the drive belts and is connected to the corresponding forming module. Adjacent forming modules have limiting grooves. One end of the limiting rod is used to engage in the limiting groove. The pushing rod has a guide slope for guiding the limiting rod to move toward the limiting groove. The return spring is used to disengage the limiting rod from the limiting groove.

[0008] By adopting the above technical solution, the corrugated pipe forming machine effectively solves this key defect by setting a limiting component on the forming module. The limiting component, comprising a limiting rod, a pushing rod, and a return spring, works in tandem. The pushing rod, guided by a guide ramp, guides the limiting rod into the limiting groove of the adjacent forming module, while the return spring prevents the limiting rod from disengaging from the groove. This structure establishes a reliable limiting relationship between adjacent forming modules, preventing misalignment due to wear at the connecting parts even after long-term use. This ensures that the forming modules located between the two drive belts are always precisely aligned, stably forming the corrugated annular groove for tube blank bonding. During tube blank forming, it ensures uniform bonding of the tube blank to the corrugated annular groove, fundamentally reducing the occurrence of burrs and material leakage in the corrugated pipe, significantly improving the forming quality. Simultaneously, the design of this limiting component eliminates the need for easily worn locating pins and screws, reducing the probability of frequent repairs or replacements of the forming module due to wear of connecting parts, extending the stable operating cycle of the equipment, and improving overall production efficiency.

[0009] Optionally, the frame is provided with an auxiliary limiting component, which includes a ground rail and an auxiliary sliding rail. The ground rail is provided on the frame, and a sliding column is provided on the lower end face of the forming module. The sliding column is slidably connected to the ground rail. The auxiliary sliding rail is provided on the frame, and the forming module is slidably connected to the side wall of the transmission belt on the auxiliary sliding rail.

[0010] By adopting the above technical solution, the sliding column on the lower end face of the forming module slides and engages with the ground rail, providing support and guidance for the lower end of the forming module and preventing vertical displacement during movement. The auxiliary sliding track slides and connects with the side wall of the forming module facing the transmission belt, restricting the position of the forming module from the side and preventing it from swaying left and right. This multi-directional auxiliary constraint structure ensures that the forming module maintains a precise movement trajectory during the movement driven by the transmission belt and the tube blank forming process, preventing it from deviating from the preset position due to external forces or wear from long-term use. This ensures that the forming module between the two transmission belts continuously and stably forms the required corrugated annular groove, providing a more reliable guarantee for the stable bonding of the tube blank, further reducing quality problems in the corrugated pipe forming process, and improving product consistency and pass rate.

[0011] Optionally, the driving component includes a driving gear, a plurality of driving tooth blocks, and a driving motor. The plurality of driving tooth blocks correspond to a plurality of forming modules. The driving tooth blocks are fixedly mounted on the forming modules. The driving tooth blocks corresponding to the forming modules arranged along the length direction of the transmission belt form a rack. The driving gear is rotatably connected to the frame. The driving gear is used to mesh simultaneously with two driving tooth blocks that form a rack and are paired together. The driving motor drives the gear to rotate.

[0012] By adopting the above technical solution, several drive gear blocks correspond one-to-one with and are fixedly connected to the forming modules. The drive gear blocks corresponding to the forming modules arranged along the length of the transmission belt form a rack. The drive gear can simultaneously mesh with two pairs of drive gear blocks, driving the forming modules to move under the drive of the drive motor. Compared with the traditional drive structure, this drive method has more precise and stable power transmission, ensuring that all forming modules maintain synchronicity during movement. It avoids relative displacement or misalignment of the forming modules due to inconsistent driving. The synchronously moving forming modules can always maintain the integrity and consistency of the corrugated annular groove, so that the tube blank is evenly stressed during the forming process, further improving the forming accuracy and quality of the corrugated pipe. At the same time, the stable drive structure also reduces the failure rate during equipment operation, extends the service life of the equipment, and ensures the continuity of production.

[0013] Optionally, the transmission belt is provided with a snap-fit ​​block, and the forming module is provided with a snap-fit ​​groove. The snap-fit ​​groove passes through the lower end face of the forming module, and the forming module is snapped onto the snap-fit ​​block through the snap-fit ​​groove. When the forming module is not in a state that can form a corrugated annular groove for tube blank bonding, the limiting component cannot limit the forming module, and the forming module can be easily replaced.

[0014] By adopting the above technical solution, a snap-fit ​​block is set on the transmission belt, and a snap-fit ​​groove is opened on the lower end face of the forming module, so that the forming module is snapped onto the snap-fit ​​block through the snap-fit ​​groove. This changes the traditional installation method of fixing with bolts, simplifies the installation and disassembly process of the forming module, and clarifies that when the forming module is not in the state of forming the corrugated annular groove, the limiting component cannot limit it. At this time, the forming module can be easily replaced. This design not only solves the problems of easy wear and difficult disassembly of bolts in the traditional bolt fixing method, but also greatly shortens the replacement time of the forming module, reduces the downtime of the equipment due to module replacement, and significantly improves production efficiency. In addition, the convenient replacement method also facilitates the maintenance and repair of the forming module, ensuring that the forming module is always in good working condition, and indirectly ensuring the forming quality of the corrugated pipe.

[0015] Optionally, the auxiliary sliding track is provided with a clearance groove to facilitate the disassembly of the molding module.

[0016] By adopting the above technical solution, a clearance groove is opened on the auxiliary sliding track. This clearance groove provides greater operating space and convenience for the disassembly of the molding module. When it is necessary to disassemble the molding module, the clearance groove can prevent the auxiliary sliding track from obstructing the disassembly process, allowing operators to remove the molding module from the transmission belt more easily and quickly. This further simplifies the disassembly process of the molding module. Combined with the convenient replacement design, it further improves the efficiency of molding module replacement and maintenance, reduces equipment downtime, ensures production continuity, and reduces production costs.

[0017] Optionally, the frame is provided with a cooling component for cooling the formed corrugated pipe. The cooling component includes a cooling pipe and an air pump. The air pump is mounted on the frame. One end of the cooling pipe is connected to the air outlet of the air pump, and the other end of the cooling pipe faces the surface of the formed corrugated pipe.

[0018] By adopting the above technical solution, the airflow generated by the air pump is guided through the cooling pipe to the surface of the formed corrugated pipe, which can quickly remove the heat generated during the corrugated pipe forming process, achieving rapid cooling of the corrugated pipe. Rapid cooling not only allows the shape of the corrugated pipe to be quickly fixed, avoiding deformation of the corrugated pipe during subsequent transportation due to untimely cooling, and ensuring the dimensional accuracy and shape stability of the corrugated pipe, but also shortens the corrugated pipe forming cycle, increases the production quantity per unit time, and improves the overall production efficiency; at the same time, proper cooling can also improve the mechanical properties of the corrugated pipe, reduce the adverse effects of high-temperature residual stress on the quality of the corrugated pipe, and further improve the quality of the corrugated pipe product.

[0019] Optionally, the cooling assembly further includes a water inlet pipe, one end of which is inserted into the cooling pipe, and the water inlet pipe is used to introduce water in the opposite direction to the airflow inside the cooling pipe.

[0020] By adopting the above technical solution, a water inlet pipe is inserted into the cooling pipe, and the water inlet pipe introduces water in the opposite direction to the airflow inside the cooling pipe. This design allows the water to fully contact the airflow inside the cooling pipe, and the water can be dispersed by the airflow to form water mist. The water can significantly reduce the temperature of the airflow, forming a low-temperature water mist airflow. The low-temperature water mist airflow blows onto the surface of the formed corrugated pipe. Compared with simple airflow cooling, the cooling effect is more significant, which can further accelerate the cooling speed of the corrugated pipe, shorten the cooling time, and improve production efficiency. At the same time, the lower cooling temperature can more effectively fix the shape of the corrugated pipe, reduce the risk of deformation, and the water mist can also clean the surface of the corrugated pipe to a certain extent, removing surface dust or small impurities, improving the surface smoothness of the corrugated pipe, and further improving product quality.

[0021] Optionally, the molding module is provided with lifting lugs to facilitate hook attachment.

[0022] By adopting the above technical solution, the lifting lugs facilitate the handling and installation of the molding module. When handling, installing, or replacing the molding module, operators can hook the lifting lugs and easily move the module using lifting equipment or manually. This avoids the difficulties in handling the large size and heavy weight of the molding module, reduces the labor intensity of operators, and also reduces the risk of damage to the molding module due to improper handling during handling, ensuring the integrity of the molding module and indirectly guaranteeing the molding quality of the corrugated pipe. It also improves the efficiency of handling and installing the molding module. Combined with the design for convenient replacement and disassembly, this further optimizes the user experience and production efficiency of the equipment.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting limiting components on the molding module, the limiting rod is locked into the limiting groove of the adjacent module and kept stable; auxiliary limiting components are added to limit the position of the module from multiple directions such as top, bottom and side; drive gears and paired drive gear blocks are used to mesh and transmit power to ensure synchronous movement of the modules; multi-structure collaboration enables precise docking of modules to form a stable corrugated annular groove, uniform tube blank bonding, reducing quality problems and improving product consistency. 2. The transmission belt features locking blocks, and the modules have locking slots for quick installation; when the module has not formed a corrugated groove, the limiting components are not restrictive, and the auxiliary sliding track has clearance slots for easy module disassembly; the modules are equipped with lifting lugs for easy handling. These designs shorten module replacement time, reduce equipment downtime, facilitate maintenance and repair, and ensure production continuity. 3. The airflow generated by the air pump blows onto the corrugated pipe through the cooling pipe to achieve preliminary cooling, avoid deformation, and shorten the molding cycle; water pipes are inserted inside the cooling pipe, and the water evaporates and cools down when it comes into contact with the airflow, forming a low-temperature water mist airflow, which further accelerates the cooling speed and improves production efficiency. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of a corrugated pipe forming machine.

[0025] Figure 2 yes Figure 1 A cross-sectional view of the molding module, used to show the limiting components.

[0026] Figure 3 yes Figure 1 A schematic diagram of the auxiliary limiting component.

[0027] Figure 4 yes Figure 1 A schematic diagram of the cooling components and drive unit.

[0028] Reference numerals: 1. Frame; 2. Transmission belt; 21. Snap-fit ​​block; 3. Molding module; 31. Receiving groove; 32. Restricting groove; 33. Lifting lug; 34. Sliding column; 35. Auxiliary sliding groove; 4. Driving component; 41. Driving gear; 42. Driving tooth block; 43. Driving motor; 5. Restricting component; 51. Restricting rod; 52. Push rod; 53. Return spring; 54. Guide ramp; 6. Auxiliary limiting component; 61. Ground rail; 62. Auxiliary sliding track; 63. Sliding groove; 64. Clearance groove; 7. Cooling component; 71. Cooling pipe; 72. Air pump; 73. Water inlet pipe. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] This application discloses a corrugated pipe forming machine. (Refer to...) Figure 1 and Figure 2 A corrugated pipe forming machine includes a frame 1, two transmission belts 2, several forming modules 3, and a drive unit 4. The two transmission belts 2 are located on both sides of the pipe blank, and the length direction of the transmission belts 2 is parallel to the length direction of the pipe blank. The transmission belts 2 are rotatably connected to the frame 1. The several forming modules 3 are evenly distributed along the circumference of the transmission belts 2. The forming modules 3 are located on one side of the outer wall of the transmission belts 2. The forming modules 3 are detachably connected to the transmission belts 2. The forming modules 3 on the two transmission belts correspond to each other. The corresponding forming modules 3 facing the pipe blank form a corrugated annular groove that can fit the outer wall of the pipe blank. The drive unit 4 is used to drive the pairs of forming modules 3 to move.

[0031] Reference Figure 1 and Figure 2The molding module 3 is provided with a limiting member 5 for restricting relative movement with adjacent molding modules 3. The limiting member 5 includes a limiting rod 51, a pushing rod 52, and a return spring 53. The molding module 3 has a receiving groove 31. The limiting rod 51 and the pushing rod 52 are located in the receiving groove 31. The length direction of the pushing rod 52 is parallel to the distribution direction of the two transmission belts 2. The pushing rod 52 slides along the length direction of the pushing rod 52 and is connected to the receiving groove 31. One end of the pushing rod 52 is used to abut against another pair of molding modules 3. The limiting rod 51 is horizontal and perpendicular to the length direction of the limiting rod 51. The length of the rod 51 is slidably connected to the receiving groove 31. A limiting groove 32 is provided on the side wall of the adjacent molding module 3. The limiting rod 51 is used to engage with the limiting groove 32. A guide slope 54 is provided on the end face of the push rod 52 away from the other molding module 3 and on the end of the push rod 52 facing the limiting rod 51. The length of the return spring 53 is parallel to the length of the limiting rod 51. One end of the return spring 53 is fixedly set on the limiting rod 51, and the other end of the return spring 53 is fixedly set on the side wall of the receiving groove 31. When one end of the limiting rod 51 is located in the limiting groove 32, the return spring 53 is in a stretched state.

[0032] Reference Figure 2 and Figure 3 A plurality of snap-fit ​​blocks 21 are provided on the transmission belt 2. The snap-fit ​​blocks 21 are evenly distributed along the circumference of the transmission belt 2. The snap-fit ​​blocks 21 are fixedly set on the outer side wall of the transmission belt 2. The snap-fit ​​blocks 21 are in the shape of an isosceles trapezoid. The forming module 3 has a snap-fit ​​groove on the side facing the transmission belt 2. The snap-fit ​​groove extends vertically through the lower end face of the forming module 3. The snap-fit ​​blocks 21 are used to snap into the snap-fit ​​groove of the forming module 3. The upper end face of the forming module 3 is fixedly provided with a lifting lug 33. The lifting lug 33 is convenient for hooking by a lifting device with a hook.

[0033] Reference Figure 2 and Figure 3 The frame 1 is also equipped with an auxiliary limiting component 6, which includes a ground rail 61 and an auxiliary sliding rail 62. The ground rail 61 is fixedly installed on the frame 1. A sliding groove 63 is opened on the upper end face of the ground rail 61. A sliding column 34 is fixedly installed on the lower end face of the forming module 3. The sliding column 34 is vertically installed and the lower end face of the sliding column 34 is located in the sliding groove 63. The auxiliary sliding rail 62 is fixedly installed on the frame 1. An auxiliary sliding groove 35 is opened on the end of the forming module 3 facing the transmission belt 2. The forming module 3 is slidably connected to the auxiliary sliding rail 62 through the auxiliary sliding groove 35. An avoidance groove 64 is opened on the side of the auxiliary sliding rail 62 away from the tube blank. The avoidance groove 64 facilitates the operator to detach the forming module 3 from the transmission belt 2.

[0034] Reference Figure 1 and Figure 4The driving component 4 includes a driving gear 41, a plurality of driving tooth blocks 42, and a driving motor 43. The plurality of driving tooth blocks 42 correspond to a plurality of forming modules 3. When the corresponding forming module 3 is located on the long side of the transmission belt 2, the driving tooth blocks 42 form a rack. The axis of the driving gear 41 is horizontal and perpendicular to the length direction of the transmission belt 2. The driving gear 41 is rotatably connected to the frame 1. The driving gear 41 is used to mesh simultaneously with two driving tooth blocks 42 that form a rack and are paired together. The driving motor 43 is fixedly mounted on the frame 1. The output shaft of the driving motor 43 is fixedly connected to the driving gear 41.

[0035] Reference Figure 1 and Figure 4 The frame 1 is equipped with a cooling component 7 for cooling the formed corrugated pipe. The cooling component 7 includes a cooling pipe 71, an air pump 72 and a water inlet pipe 73. The air pump 72 is fixedly installed on the frame 1. One end of the cooling pipe 71 is fixedly installed at the air outlet of the air pump 72, and the other end of the cooling pipe 71 faces the formed corrugated pipe. One end of the water inlet pipe 73 is inserted into the cooling pipe 71 and communicates with the inside of the cooling pipe 71. The water inlet direction of the water inlet pipe 73 is opposite to the airflow direction inside the cooling pipe 71.

[0036] The implementation principle of a corrugated pipe forming machine according to an embodiment of this application is as follows: the slotted connection enables the detachable installation of the forming module 3 on the transmission belt 2; the lifting lug 33 facilitates the handling and replacement of the forming module 3 with the aid of lifting equipment; the ground rail 61 on the frame 1 slides and engages with the sliding column 34 at the lower end of the forming module 3; the auxiliary sliding rail 62 slides and connects with the auxiliary sliding groove 35 of the forming module 3, limiting the forming module 3 from multiple directions to ensure its stable position; and the clearance groove 64 facilitates the forming module 3 to detach from the transmission belt 2.

[0037] When the drive component 4 is working, the drive motor 43 drives the drive gear 41 to rotate. The drive gear 41 meshes with the drive tooth block 42 on the forming module 3 at the long side of the transmission belt 2, thereby driving the pair of forming modules 3 to move synchronously, so that the forming modules 3 at corresponding positions on the two transmission belts 2 are precisely aligned to form a corrugated annular groove that fits the outer wall of the tube blank. During this process, the limiting component 5 on the forming module 3 plays a role. After the push rod 52 abuts against the other forming module 3 in the pair, its guide slope 54 guides the limiting rod 51 to slide and lock into the limiting groove 32 of the adjacent forming module 3. The return spring 53 in the stretched state can maintain the locking between the limiting rod 51 and the limiting groove 32, preventing the relative movement of the adjacent forming modules 3, and further ensuring the stability of the corrugated annular groove.

[0038] After the tube blank enters the forming machine, it fits into the corrugated ring groove to complete the forming. Then, the cooling component 7 on the frame 1 is activated, and the airflow generated by the air pump 72 enters the cooling pipe 71. At the same time, the water inlet pipe 73 introduces water in the opposite direction to the airflow in the cooling pipe 71. The water evaporates and absorbs heat when it comes into contact with the airflow, reducing the airflow temperature. The low-temperature water mist airflow blows onto the formed corrugated tube to achieve rapid cooling, ensuring the stability of the corrugated tube shape and completing the entire corrugated tube forming process.

[0039] 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 corrugated pipe forming machine, characterized in that: The assembly includes a frame (1), two drive belts (2), several forming modules (3), and a drive unit (4). The drive belts (2) are rotatably connected to the frame (1), and the two drive belts (2) are parallel to each other. Several forming modules (3) are arranged on the drive belts (2). The forming modules (3) located between the two drive belts (2) can form corrugated annular grooves for tube blank bonding. The drive unit (4) is used to drive the forming modules (3) to move. The forming modules (3) are provided with limiting members (5). The limiting members (5) include a limiting rod (51), a pushing rod (52), and a return spring (53). 3) The push rod (52) slides along the distribution direction of the two transmission belts (2) and is connected to the corresponding molding module (3). The limiting rod (51) slides along the length direction of the transmission belt (2) and is connected to the corresponding molding module (3). A limiting groove (32) is provided on the adjacent molding module (3). One end of the limiting rod (51) is used to engage in the limiting groove (32). A guide slope (54) is provided on the push rod (52) to guide the limiting rod (51) to move toward the limiting groove (32). The reset spring (53) is used to limit the rod (51) from disengaging from the limiting groove (32).

2. The corrugated pipe forming machine according to claim 1, characterized in that: An auxiliary limiting component (6) is provided on the frame (1). The auxiliary limiting component (6) includes a ground rail (61) and an auxiliary sliding rail (62). The ground rail (61) is provided on the frame (1). A sliding column (34) is provided on the lower end face of the molding module (3). The sliding column (34) is slidably connected to the ground rail (61). The auxiliary sliding rail (62) is provided on the frame (1). The molding module (3) is slidably connected to the auxiliary sliding rail (62) on the side wall of the transmission belt (2).

3. The corrugated pipe forming machine according to claim 2, characterized in that: The driving component (4) includes a driving gear (41), a plurality of driving tooth blocks (42) and a driving motor (43). The plurality of driving tooth blocks (42) correspond to a plurality of forming modules (3). The driving tooth blocks (42) are fixedly set on the forming modules (3). The driving tooth blocks (42) corresponding to the forming modules (3) arranged along the length direction of the transmission belt (2) form a rack. The driving gear (41) is rotatably connected to the frame (1). The driving gear (41) is used to mesh simultaneously with two driving tooth blocks (42) that form a rack and are paired together. The driving motor (43) drives the gear (41) to rotate.

4. A corrugated pipe forming machine according to claim 2, characterized in that: The transmission belt (2) is provided with a snap-fit ​​block (21), and the forming module (3) is provided with a snap-fit ​​groove. The snap-fit ​​groove passes through the lower end face of the forming module (3). The forming module (3) is snapped onto the snap-fit ​​block (21) through the snap-fit ​​groove. When the forming module (3) is not in a state that can form a corrugated annular groove for tube blank bonding, the limiting member (5) cannot limit the forming module (3), and the forming module (3) can be easily replaced.

5. A corrugated pipe forming machine according to claim 4, characterized in that: The auxiliary sliding track (62) is provided with a clearance groove (64) to facilitate the disassembly of the molding module (3).

6. A corrugated pipe forming machine according to claim 1, characterized in that: The frame (1) is provided with a cooling component (7) for cooling the formed corrugated pipe. The cooling component (7) includes a cooling pipe (71) and an air pump (72). The air pump (72) is located on the frame (1). One end of the cooling pipe (71) is connected to the air outlet of the air pump (72), and the other end of the cooling pipe (71) faces the surface of the formed corrugated pipe.

7. A corrugated pipe forming machine according to claim 6, characterized in that: The cooling component (7) also includes a water inlet pipe (73), one end of which is inserted into the cooling pipe (71), and the water inlet pipe (73) is used to introduce water in the opposite direction of the airflow inside the cooling pipe (71).

8. A corrugated pipe forming machine according to claim 1, characterized in that: The molding module (3) is provided with a lifting lug (33) for easy hooking.

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