A bellows forming module

Abstract

The utility model relates to the corrugated pipe production technical field more specifically, relate to a kind of corrugated pipe forming module, comprising: main body, respectively on the crest forming surface and the trough forming surface of main body, respectively on the vacuum slit of crest forming surface, respectively in the first cooling waterway and the second cooling waterway of main body, respectively on the vacuum passage of main body, water inlet passage and backwater passage.Cooling waterway is designed in module trough forming place, i.e., the first cooling waterway and the second cooling waterway are respectively arranged below trough forming surface, shorten the distance of forming surface and cooling waterway, improve cooling efficiency, the temperature distribution of the overall cooling waterway is more uniform by the arrangement of the first cooling waterway and the second cooling waterway, avoid the production deformation caused by uneven cooling, improve the overall quality and forming efficiency of product, also optimize the thermal balance of mould, prolong the service life of mould.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe production technology, and more specifically, to a corrugated pipe forming module. Background Technology

[0002] High-density polyethylene (HDPE) double-wall corrugated pipes are widely used in municipal drainage, communication cable sheathing, and other fields due to their excellent outer wall ring stiffness, inner wall smoothness, and lightweight yet high strength. Ring stiffness, a crucial performance indicator for the pipe, is primarily produced using a vacuum adsorption method: molten HDPE outer wall blanks are placed in a molding module and adsorbed through a vacuum tank to form outer wall corrugations. Simultaneously, cooling water channels within the module rapidly cool the pipe, ensuring it sets. The fuller the corrugations and the more uniform the corrugation wall thickness, the higher the product's ring stiffness. Therefore, the molding effect of the vacuum and cooling systems in the corrugated pipe module is critical to the product's ring stiffness performance.

[0003] In terms of cooling systems, existing technologies typically involve setting up cooling water cavities inside the modules, with one inlet and one outlet. After the modules are installed on the molding machine, the cooling water inlets and outlets of each module are sequentially connected to the cooling water circulation system of the molding machine body. This approach suffers from low cooling efficiency due to the water circuit design and cumbersome module water circuit installation. Furthermore, untimely cooling can easily lead to uneven wave crest wall thickness, affecting product quality. Regarding vacuum systems, existing technologies typically involve creating a vacuum channel at the bottom of the module and designing vacuum grooves on the side to connect the vacuum seams at each wave crest to the vacuum channel. A vacuum plate is designed at the bottom of the molding module, utilizing a semi-contact connection between the vacuum plate and the module to achieve dynamic vacuuming. However, this method is prone to vacuum leakage due to wear and displacement of the module and vacuum plate, resulting in insufficient vacuum during product molding, incomplete wave crests, and negatively impacting appearance quality and ring stiffness performance. Utility Model Content

[0004] To overcome the shortcomings of poor forming effect and poor product quality of the corrugated pipe forming module in the prior art, this utility model provides a corrugated pipe forming module to improve the production quality of corrugated pipes.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a corrugated pipe forming module, comprising: a main body, a corrugated peak forming surface and a corrugated trough forming surface respectively disposed on the main body, a vacuum seam respectively disposed on the corrugated peak forming surface, a first cooling water channel and a second cooling water channel respectively disposed within the main body, a vacuum channel, a water inlet channel and a water return channel respectively disposed on the main body, wherein the water inlet channel, the first cooling water channel, the second cooling water channel and the water return channel are sequentially connected, the corrugated peak forming surface and the corrugated trough forming surface are staggered and continuously distributed, the vacuum seam is respectively connected to the vacuum channel, and the first cooling water channel and the second cooling water channel are respectively located below the corrugated trough forming surface.

[0006] To address the shortcomings of the aforementioned corrugated pipe modules in terms of cooling efficiency, vacuum level, and installation connections, this invention provides a corrugated pipe forming module. The cooling water channels are designed at the corrugation trough forming points, specifically, the first and second cooling water channels are positioned below the corrugation trough forming surface, shortening the distance between the forming surface and the cooling water channels and improving cooling efficiency. Specifically, cooling water enters through the inlet channel, flows sequentially through the first and second cooling water channels, and then exits through the return channel. This cooling water channel configuration effectively cools the corrugated trough areas during the corrugated pipe forming process, accelerating the cooling speed after corrugated pipe formation, helping to stabilize the corrugation shape, extending the working time of the cooling water, and making the overall temperature distribution of the cooling water channels more uniform. This avoids production deformation caused by uneven cooling, improves the overall product quality and forming efficiency, optimizes the thermal balance of the mold, and extends the mold's service life.

[0007] The crest forming surface is concave on the main body, while the trough forming surface is convex. These crest and trough forming surfaces are continuously and alternately distributed. During the production of corrugated pipes, crest and trough shapes are formed on the surface of the pipe. Several vacuum slits are respectively set on the crest forming surface and connected to the vacuum channel. During forming, the vacuum effect allows the pipe to better conform to the crest forming surface, facilitating rapid and precise shaping of the crest. It also improves the contact tightness between the pipe and the mold surface, resulting in a more stable crest structure and higher product quality.

[0008] Preferably, the first cooling water path and the second cooling water path are arranged alternately.

[0009] The first and second cooling water channels are arranged in an alternating manner, that is, the first and second cooling water channels are arranged adjacent to each other, so that the cooling water flow is staggered, which can further optimize the thermal balance of the mold.

[0010] Preferably, it further includes a connecting groove disposed on the main body and a first cover plate connected to the main body, the connecting groove being connected to all the first cooling water passages and the second cooling water passages, and the first cover plate being used to seal the opening of the connecting groove.

[0011] The connecting groove is designed to connect all the first and second cooling water passages, and also facilitates manufacturing. The first cover plate serves a sealing function, but its shape can also be altered by using plugs for sealing. Relatively speaking, using the first cover plate for sealing also makes it easier to observe the interior of the first and second cooling water passages, facilitating maintenance.

[0012] Preferably, it further includes an inlet tank and a return tank disposed on the main body, and a second cover plate connected to the main body. The second cover plate is provided with an inlet and a return port respectively communicating with the inlet tank and the return tank. The inlet tank is connected to all the inlet channels, and the return tank is connected to all the return channels. The second cover plate is used to seal the openings of the inlet tank and the return tank.

[0013] The inlet trough is designed to connect the various inlet channels in parallel, and indirectly connect all the first cooling water circuits in parallel, facilitating unified water intake. The return trough serves a similar purpose, facilitating unified water output. Specifically, after the cooling water enters from the inlet, it is divided at the inlet trough and flows sequentially into the inlet channels and the first cooling water circuits. Then, it merges in the connecting trough, flows separately into the second cooling water circuits and the return channels, merges again at the return trough, and flows out from the return outlet. The second cover plate functions similarly to the first cover plate; both the inlet and return outlets are located on the second cover plate, facilitating connection to external water circuits.

[0014] Preferably, it also includes a sealing ring, which is arranged around the openings of the connecting groove, the inlet groove, and the return groove.

[0015] The sealing rings enhance the sealing effect of the first and second cover plates, preventing water leakage at the connection. Furthermore, annular mounting grooves for installing the sealing rings are provided around the openings of the connecting groove, the inlet groove, and the return groove.

[0016] Preferably, it also includes a vacuum groove that runs through the main body and plugs respectively disposed at both ends of the vacuum groove. The vacuum groove is connected to all the vacuum seams and the vacuum channel. The vacuum groove is located below the first cooling water channel and the second cooling water channel.

[0017] The vacuum slit extends below the first and second cooling water passages and connects with the vacuum tank.

[0018] Preferably, it further includes a water inlet, a water return, and a vacuum interface respectively connected to the second cover plate. The second cover plate is provided with a vacuum port communicating with the vacuum channel. The water inlet is located on the water inlet, the water return is located on the water return, and the vacuum interface is located on the vacuum port.

[0019] The water inlet, water outlet, and vacuum interface are all located on the second cover plate, which facilitates unified management and connection of each interface and makes maintenance easier. In addition, each interface is fixedly connected to the second cover plate to ensure the sealing of the cooling water circuit and vacuum channel, thus ensuring production quality.

[0020] Preferably, the main body is provided with a mounting part, the mounting part is provided with a mounting surface, the vacuum channel, the water inlet channel and the water return channel are all disposed in the mounting part, and the second cover plate is disposed on the mounting surface.

[0021] The main body is mounted on the external device via the mounting section. The second cover plate is set on the mounting surface, indirectly placing the water inlet, water outlet, and vacuum interface on the mounting surface. During the installation of the main body, each interface can be directly plugged into the external device without additional connection, achieving quick connection and making installation more convenient and efficient. This also ensures that each interface is relatively fixed to the external device, avoiding vacuum leakage and improving vacuum degree and uniformity. Specifically, the connection between each interface and the external device must ensure a tight seal.

[0022] Preferably, the vacuum seams extend along the crest forming surface, and the first cooling water channel and the second cooling water channel extend along the trough forming surface.

[0023] Preferably, each of the wave crest forming surfaces has at least two vacuum seams.

[0024] Each corrugated surface has at least two vacuum slits to enhance the adhesion and uniformity of the corrugated surface. During the corrugated tube forming process, the denser vacuum slits allow for a faster and more precise fit between the corrugated area and the mold, accelerating the forming process and improving production efficiency. Simultaneously, the synergistic effect of multiple vacuum slits further ensures the accuracy of the corrugated shape, improving product quality and meeting higher production standards and quality requirements.

[0025] Compared with the prior art, the beneficial effects of this utility model are: 1. The cooling water channels are designed at the trough forming point of the module, that is, the first cooling water channel and the second cooling water channel are respectively set below the trough forming surface. This shortens the distance between the forming surface and the cooling water channels, improves the cooling efficiency, and the setting of the first and second cooling water channels makes the overall temperature distribution of the cooling water channels more uniform, avoids production deformation caused by uneven cooling, improves the overall quality and forming efficiency of the product, optimizes the thermal balance of the mold, and extends the service life of the mold. 2. The water inlet, water return, and vacuum interfaces are located on the mounting surface, enabling quick connection during module positioning and installation, thus improving installation efficiency; 3. The water inlet, water outlet, and vacuum interface can be fixedly connected to external equipment and move with the external equipment, avoiding the movement of the seal with the external equipment, improving the overall strength of the cooling channel and vacuum channel, and can withstand higher water flow pressure and vacuum intensity. It can be connected to cooling water with higher water pressure and flow rate to improve the cooling effect. Similarly, it can also improve the vacuum adsorption effect, resulting in uniform vacuum and high vacuum degree. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a corrugated pipe forming module according to this utility model; Figure 2 yes Figure 1 Enlarged schematic diagram of part A; Figure 3 This is a schematic diagram of the internal structure of a corrugated pipe forming module according to this utility model; Figure 4 This is a schematic diagram of the second cooling water channel structure of a corrugated pipe forming module according to this utility model; Figure 5 This is a schematic diagram of the connecting groove structure of a corrugated pipe forming module according to this utility model; Figure 6 This is a schematic diagram of the second cover plate structure of a corrugated pipe forming module according to this utility model; Figure 7 This is a schematic diagram of the water inlet and water return tank structure of a corrugated pipe forming module according to this utility model.

[0027] In the diagram: 1. Main body; 2. Wave crest forming surface; 3. Wave trough forming surface; 4. Vacuum seam; 5. First cooling water channel; 6. Second cooling water channel; 7. Vacuum channel; 8. Water inlet channel; 9. Water return channel; 10. Connecting groove; 11. First cover plate; 12. Water inlet groove; 13. Water return groove; 14. Second cover plate; 15. Water inlet; 16. Water return outlet; 17. Sealing ring; 18. Vacuum groove; 19. Plug; 20. Water inlet interface; 21. Water return interface; 22. Vacuum interface; 23. Vacuum port; 24. Mounting part; 25. Mounting surface. Detailed Implementation

[0028] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0029] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example 1 like Figure 1-4 As shown, a corrugated pipe forming module includes: a main body 1, a corrugated peak forming surface 2 and a corrugated trough forming surface 3 respectively disposed on the main body 1, a vacuum slit 4 respectively disposed on the corrugated peak forming surface 2, a first cooling water channel 5 and a second cooling water channel 6 respectively disposed within the main body 1, a vacuum channel 7, a water inlet channel 8 and a water return channel 9 respectively disposed on the main body 1, the water inlet channel 8, the first cooling water channel 5, the second cooling water channel 6 and the water return channel 9 are connected in sequence, the corrugated peak forming surface 2 and the corrugated trough forming surface 3 are staggered and continuously distributed, the vacuum slit 4 is connected to the vacuum channel 7 respectively, and the first cooling water channel 5 and the second cooling water channel 6 are respectively located below the corrugated trough forming surface 3.

[0031] To address the shortcomings of the aforementioned corrugated pipe modules in terms of cooling efficiency, vacuum level, and installation connections, this invention provides a corrugated pipe forming module. The cooling water channels are designed at the corrugation trough forming points of the module; specifically, the first cooling water channel 5 and the second cooling water channel 6 are respectively positioned below the corrugation trough forming surface 3, shortening the distance between the forming surface and the cooling water channels and improving cooling efficiency. Specifically, cooling water enters through the inlet channel 8, flows sequentially through the first cooling water channel 5 and the second cooling water channel 6, and then exits through the return channel 9. This cooling water channel configuration effectively cools the corrugated trough areas during the corrugated pipe forming process, accelerating the cooling speed after corrugated pipe formation, helping to stabilize the corrugation shape, extending the working time of the cooling water, and making the overall temperature distribution of the cooling water channels more uniform. This avoids production deformation caused by uneven cooling, improves the overall product quality and forming efficiency, optimizes the thermal balance of the mold, and extends the mold's service life.

[0032] The crest forming surface 2 is recessed on the main body 1, while the trough forming surface 3 is convex. The crest forming surface 2 and the trough forming surface 3 are distributed alternately and continuously. During the production of the corrugated pipe, crest and trough surfaces are formed on the surface of the corrugated pipe, respectively. Several vacuum slits 4 are respectively set on the crest forming surface 2 and connected to the vacuum channel 7. During forming, the vacuum effect allows the pipe to better fit the crest forming surface 2, which helps to quickly and accurately shape the crest. At the same time, it can also improve the contact tightness between the pipe and the mold surface, making the formed crest structure more stable and the product quality higher.

[0033] The beneficial effects of this embodiment are as follows: The cooling water channel is designed at the trough forming point of the module, that is, the first cooling water channel 5 and the second cooling water channel 6 are respectively set below the trough forming surface 3, which shortens the distance between the forming surface and the cooling water channel, improves the cooling efficiency, and the setting of the first cooling water channel 5 and the second cooling water channel 6 makes the overall temperature distribution of the cooling water channel more uniform, avoids production deformation caused by uneven cooling, improves the overall quality and forming efficiency of the product, optimizes the thermal balance of the mold, and extends the service life of the mold.

[0034] Example 2 This embodiment further defines the features of Embodiment 1, and its difference from Embodiment 1 lies in: like Figure 2 As shown, the first cooling water channel 5 and the second cooling water channel 6 are arranged alternately. Figure 4-5 As shown, it also includes a connecting groove 10 disposed on the main body 1 and a first cover plate 11 connected to the main body 1. The connecting groove 10 communicates with all the first cooling water passages 5 and the second cooling water passages 6, and the first cover plate 11 is used to seal the opening of the connecting groove 10. Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, it also includes an inlet tank 12 and a return tank 13 disposed on the main body 1, and a second cover plate 14 connected to the main body 1. The second cover plate 14 is provided with an inlet 15 and a return port 16 respectively communicating with the inlet tank 12 and the return tank 13. The inlet tank 12 communicates with all inlet channels 8, and the return tank 13 communicates with all return channels 9. The second cover plate 14 is used to seal the openings of the inlet tank 12 and the return tank 13. It also includes a sealing ring 17, which is disposed around the openings of the connecting groove 10, the inlet tank 12, and the return tank 13.

[0035] The first cooling water passage 5 and the second cooling water passage 6 are arranged in an alternating manner, that is, the first cooling water passage 5 and the second cooling water passage 6 are arranged adjacently, so that the cooling water flow is staggered, which can further optimize the thermal balance of the mold. A connecting groove 10 is provided to connect all the first cooling water passages 5 and the second cooling water passages 6, which also facilitates processing. The first cover plate 11 serves a sealing function, and the shape of the connecting groove 10 can also be changed to use a plug 19 for sealing. Relatively speaking, using the first cover plate 11 for sealing makes it easier to observe the inside of the first cooling water passages 5 and the second cooling water passages 6, which facilitates maintenance, etc. The inlet trough 12 is designed to connect all the inlet channels 8 in parallel, and indirectly connect all the first cooling water paths 5 in parallel, facilitating unified water intake. The return trough 13 serves a similar purpose, facilitating unified water output. Specifically, after the cooling water enters from the inlet 15, it is split at the inlet trough 12 and flows sequentially into the inlet channels 8 and the first cooling water paths 5, then merges in the connecting trough 10, and then flows into the second cooling water paths 6 and the return channels 9, before merging again at the return trough 13 and flowing out from the return outlet 16. The second cover plate 14 functions similarly to the first cover plate 11. Both the inlet 15 and the return outlet 16 are located on the second cover plate 14, facilitating connection to external water paths. A sealing ring 17 is provided to enhance the sealing effect of the first cover plate 11 and the second cover plate 14, preventing leakage at the connection point. Furthermore, annular mounting grooves for installing the sealing ring 17 are provided around the openings of the connecting trough 10, the inlet trough 12, and the return trough 13.

[0036] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0037] Example 3 Based on Example 1 or Example 2, Example 1 or Example 2 are further defined, with the following differences: like Figure 3-4 As shown, it also includes a vacuum groove 18 penetrating the main body 1, and plugs 19 respectively disposed at both ends of the vacuum groove 18. The vacuum groove 18 is connected to all vacuum seams 4 and vacuum channels 7, and the vacuum groove 18 is located below the first cooling water channel 5 and the second cooling water channel 6. Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, it also includes a water inlet 20, a water return 21, and a vacuum interface 22, which are respectively connected to the second cover plate 14. The second cover plate 14 has a vacuum port 23 communicating with the vacuum channel 7. The water inlet 20 is located on the water inlet 15, the water return 21 is located on the water return 16, and the vacuum interface 22 is located on the vacuum port 23. The main body 1 has a mounting part 24, and the mounting part 24 has a mounting surface 25. The vacuum channel 7, the water inlet channel 8, and the water return channel 9 are all located in the mounting part 24, and the second cover plate 14 is located on the mounting surface 25. Figure 1-2As shown, vacuum seams 4 extend along the crest forming surface 2, and the first cooling water channel 5 and the second cooling water channel 6 extend along the trough forming surface 3. Each crest forming surface 2 has at least two vacuum seams 4.

[0038] Vacuum seam 4 extends below the first cooling water passage 5 and the second cooling water passage 6, and communicates with the vacuum tank 18. The water inlet 20, water return 21, and vacuum interface 22 are all located on the second cover plate 14, facilitating unified management and connection of each interface, and also simplifying maintenance. Each interface is fixedly connected to the second cover plate 14, ensuring the sealing of the cooling water passage and vacuum channel 7, and guaranteeing production quality. The main body 1 is mounted on an external device via the mounting part 24. The second cover plate 14 is located on the mounting surface 25, indirectly placing the water inlet 20, water return 21, and vacuum interface 22 on the mounting surface 25. During the installation of the main body 1, each interface can be directly plugged into the external device without additional connection, achieving rapid connection, making installation more convenient and efficient. This also ensures that each interface is relatively fixed to the external device, avoiding vacuum leakage and improving vacuum degree and uniformity. Specifically, the connection between each interface and the external device must ensure sealing. Each corrugated forming surface 2 has at least two vacuum slits 4 to enhance the adhesion and uniformity of the corrugated pipe's crest shape. During the corrugated pipe forming process, the denser vacuum slits 4 can more quickly and tightly fit the crest area with the mold, accelerating the forming speed and improving production efficiency. Simultaneously, the synergistic effect of multiple vacuum slits 4 further ensures the accuracy of the crest shape, improves product quality, and meets higher production standards and quality requirements.

[0039] In this embodiment, the mounting surface 25 is located on the end face of the mounting part 24. During installation, the mounting surface 25 is in contact with the external device as a whole.

[0040] The remaining working principles and processes of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

[0041] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A corrugated pipe forming module, characterized in that, include: The main body (1) has a wave crest forming surface (2) and a wave trough forming surface (3) respectively set on the main body (1), a vacuum slit (4) respectively set on the wave crest forming surface (2), a first cooling water channel (5) and a second cooling water channel (6) respectively set in the main body (1), a vacuum channel (7), a water inlet channel (8) and a water return channel (9) respectively set on the main body (1). The water inlet channel (8), the first cooling water channel (5), the second cooling water channel (6) and the water return channel (9) are connected in sequence. The wave crest forming surface (2) and the wave trough forming surface (3) are staggered and continuously distributed. The vacuum slit (4) is connected to the vacuum channel (7). The first cooling water channel (5) and the second cooling water channel (6) are located below the wave trough forming surface (3).

2. The corrugated pipe forming module according to claim 1, characterized in that: The first cooling water path (5) and the second cooling water path (6) are arranged alternately.

3. The corrugated pipe forming module according to claim 1, characterized in that: It also includes a connecting groove (10) disposed on the main body (1) and a first cover plate (11) connected to the main body (1). The connecting groove (10) is connected to all the first cooling water passages (5) and the second cooling water passages (6). The first cover plate (11) is used to seal the opening of the connecting groove (10).

4. The corrugated pipe forming module according to claim 3, characterized in that: It also includes an inlet tank (12) and a return tank (13) disposed on the main body (1), and a second cover plate (14) connected to the main body (1). The second cover plate (14) is provided with an inlet (15) and a return outlet (16) respectively communicating with the inlet tank (12) and the return tank (13). The inlet tank (12) is connected to all the inlet channels (8), and the return tank (13) is connected to all the return channels (9). The second cover plate (14) is used to seal the openings of the inlet tank (12) and the return tank (13).

5. A corrugated pipe forming module according to claim 4, characterized in that: It also includes a sealing ring (17) which is arranged around the openings of the connecting groove (10), the inlet groove (12) and the return groove (13).

6. A corrugated pipe forming module according to claim 4, characterized in that: It also includes a vacuum groove (18) that runs through the main body (1) and plugs (19) respectively disposed at both ends of the vacuum groove (18). The vacuum groove (18) is connected to all the vacuum seams (4) and the vacuum channel (7). The vacuum groove (18) is located below the first cooling water channel (5) and the second cooling water channel (6).

7. A corrugated pipe forming module according to claim 6, characterized in that: It also includes a water inlet (20), a water return (21) and a vacuum interface (22) respectively connected to the second cover plate (14). The second cover plate (14) is provided with a vacuum port (23) communicating with the vacuum channel (7). The water inlet (20) is located on the water inlet (15), the water return (21) is located on the water return (16), and the vacuum interface (22) is located on the vacuum port (23).

8. A corrugated pipe forming module according to claim 7, characterized in that: The main body (1) is provided with an installation part (24), and the installation part (24) is provided with an installation surface (25). The vacuum channel (7), the water inlet channel (8) and the water return channel (9) are all located in the installation part (24), and the second cover plate (14) is located on the installation surface (25).

9. A corrugated pipe forming module according to claim 1, characterized in that: The vacuum seam (4) extends along the crest forming surface (2), and the first cooling water channel (5) and the second cooling water channel (6) extend along the trough forming surface (3).

10. A corrugated pipe forming module according to claim 1, characterized in that: Each of the wave crest forming surfaces (2) has at least two vacuum seams (4).

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