A demolding structure of a bellows forming machine

Abstract

The utility model relates to a kind of demolding structure of bellows forming machine, including the upper die and lower die sequentially connected from top to bottom, cooling demolding component is provided on the upper die, the cooling demolding component includes the first cooling pipeline that is arranged in the serpentine of upper die, the both sides of the upper die are provided with the first connecting pipe fitting that is connected with the both ends of first cooling pipeline, the upper die is provided with several heat-conducting needles, the lower die is provided with the second cooling pipeline that is arranged in the serpentine. The demolding structure of bellows forming machine, by setting first cooling pipeline and second cooling pipeline in the upper die and lower die respectively, and setting resistance plate in pipeline, effectively prolong the flow path and time of cooling medium in pipeline, enhance heat exchange efficiency, so as to realize the rapid, uniform cooling of mould, avoid the deformation or surface defect of bellows due to local temperature difference is too large, significantly improve demolding quality and product consistency.

Description

Technical Field

[0001] This utility model relates to the field of molding machine technology, specifically to a demolding structure for a corrugated pipe molding machine. Background Technology

[0002] The corrugated pipe forming machine is a specialized device for producing metal corrugated pipes for prestressed concrete engineering. It forms double-wave shapes by rolling galvanized or cold-rolled steel strips and then forming them through a crimping and pressing process. Its products are mainly used for post-tensioned prestressed pipe forming in bridges and large buildings, and have been extended to highway culverts, municipal drainage, coal mine tunnels, and power plant flues. The equipment is driven by a continuously variable speed motor and forms spiral corrugated pipes through processes such as four sets of rollers pressing and flanging, and crimping rollers.

[0003] In the corrugated pipe forming process, demolding is one of the key steps. Existing demolding structures mostly adopt simple cooling methods, such as a single cooling pipe, which have problems such as uneven cooling, low demolding efficiency, and long forming cycle. Especially in high temperature environments, insufficient heat dissipation of the mold can easily lead to a decrease in the surface quality of the corrugated pipe, unstable dimensions, and even sticking to the mold, affecting production efficiency and product quality.

[0004] Therefore, a demolding structure for a corrugated pipe forming machine is proposed to solve the aforementioned technical problem of uneven cooling. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a demolding structure for a corrugated pipe forming machine, which has the advantage of uniform cooling and solves the problem of low demolding efficiency caused by uneven cooling.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a demolding structure for a corrugated pipe forming machine, comprising an upper mold and a lower mold connected sequentially from top to bottom, wherein a cooling demolding component is provided on the upper mold; The cooling and demolding assembly includes a first cooling pipe arranged in a serpentine pattern on the upper mold, and first connecting pipes connected to both ends of the first cooling pipes on both sides of the upper mold. The upper mold is provided with a plurality of heat-conducting pins. The lower mold is provided with a second cooling pipe arranged in a serpentine pattern, and second connecting pipes connected to both ends of the second cooling pipes on both sides of the lower mold. A plurality of staggered baffles are provided on both the first and second cooling pipes.

[0007] Furthermore, one of the first connecting pipes is connected to an external cooling water inlet pipe, and the other of the first connecting pipes is connected to an external drainage pipe.

[0008] Furthermore, one of the second connecting pipes is connected to an external cooling water inlet pipe, and the other of the second connecting pipes is connected to an external drainage pipe.

[0009] Furthermore, several heat-conducting pins are evenly distributed on the upper mold, with one end of each heat-conducting pin extending into the upper mold. The heat-conducting pins are made of any one of copper, aluminum, and silver.

[0010] Furthermore, the lower mold is mounted on the molding frame, and the molding frame is equipped with a cooling fan facing the upper mold.

[0011] Furthermore, drive modules are symmetrically arranged on the molding frame, and connectors are symmetrically arranged on the upper mold.

[0012] Furthermore, the connector and the drive module are located on the same vertical line, and the output end of the drive module is connected to the connector.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The demolding structure of this corrugated pipe forming machine, by setting a first cooling pipe and a second cooling pipe in the upper mold and a baffle plate in the pipe, effectively extends the flow path and time of the cooling medium in the pipe, enhances the heat exchange efficiency, thereby achieving rapid and uniform cooling of the mold, avoiding corrugated pipe deformation or surface defects caused by excessive local temperature difference, and significantly improving demolding quality and product consistency.

[0014] 2. The demolding structure of this corrugated pipe forming machine has several heat-conducting pins on the upper mold. The heat-conducting pins are made of high thermal conductivity material, which can quickly conduct heat from inside the mold to the surface, assisting the cooling system to further improve heat dissipation efficiency. It is especially suitable for continuous production in high-temperature environments, effectively preventing mold sticking and extending the mold's service life. At the same time, a cooling fan is added to blow air towards the mold, further enhancing convection heat dissipation. Especially during the cooling water system's operation intervals or in high-temperature seasons, it can work with the heat-conducting pins to help reduce the mold surface temperature, improve demolding efficiency, shorten the molding cycle, and improve overall production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the cooling and demolding assembly in this utility model; Figure 3 This is a left view of the connection structure between the drive module and the connector in this utility model; Figure 4 This is a cross-sectional view of the upper mold in this utility model; Figure 5 This is a cross-sectional view of the lower mold in this utility model.

[0016] In the diagram: 100, upper mold; 200, lower mold; 300, cooling and demolding assembly; 400, molding frame; 41, drive module; 42, connector; 301, first cooling pipe; 302, first connecting pipe; 303, heat conduction pin; 304, second cooling pipe; 305, second connecting pipe; 306, cooling fan; 307, baffle plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] Please see Figure 1-2 In this embodiment, a demolding structure for a corrugated pipe forming machine includes an upper mold 100 and a lower mold 200 connected sequentially from top to bottom, and a cooling demolding assembly 300 is provided on the upper mold 100. The cooling demolding assembly 300 includes a first cooling pipe 301 arranged in a serpentine pattern on the upper mold 100, a first connecting pipe 302 connected to both ends of the first cooling pipe 301 on both sides of the upper mold 100, a plurality of heat-conducting pins 303 on the upper mold 100, a second cooling pipe 304 arranged in a serpentine pattern on the lower mold 200, a second connecting pipe 305 connected to both ends of the second cooling pipe 304 on both sides of the lower mold 200, and a plurality of staggered baffles 307 on both the first cooling pipe 301 and the second cooling pipe 304.

[0019] In application, external cooling water enters the upper mold 100 through the first connecting pipe 302 on one side, forming a serpentine first cooling pipe 301. Simultaneously, cooling water enters the lower mold 200 through the second connecting pipe 305 on one side, forming a similarly serpentine second cooling pipe 304. The serpentine layout itself extends the flow path of the cooling water, increasing the heat exchange time. More importantly, the staggered baffles 307 within the pipes disrupt the laminar flow of the cooling water, creating turbulence. This turbulence more effectively washes the pipe walls, greatly enhancing the heat exchange efficiency between the cooling water and the mold. This allows the heat transferred to the mold during molding to be carried away quickly and evenly. After heat exchange, the cooled water, now at a higher temperature, flows out through the first connecting pipe 302 and the second connecting pipe 305 on the other side. The discharge forms a continuous closed-loop cooling cycle. By simultaneously subjecting the upper mold 100 and the lower mold 200 to forced cyclic cooling, the uniformity of the temperature field of the entire mold cavity is ensured, effectively preventing bellows deformation, surface defects, or sticking to the mold due to insufficient local cooling. During operation, heat from the deep part of the mold or areas that are difficult to be directly covered by the cooling pipes will be preferentially conducted to the heat conduction pin 303. As an efficient "thermal bridge", the heat conduction pin 303 quickly transfers this heat to the part of it exposed to the outside of the mold, thereby expanding the heat dissipation area. This part of the heat can be dissipated into the surrounding air more quickly, further improving the cooling effect. Example

[0020] The basic content is the same as in Example 1, except that: Please see Figure 2 , Figure 4-5 In this embodiment, one of the first connecting pipes 302 is connected to the external cooling water inlet pipe, and the other first connecting pipe 302 is connected to the external drainage pipe.

[0021] One of the second connecting pipe fittings 305 is connected to the external cooling water inlet pipe, and the other second connecting pipe fitting 305 is connected to the external drainage pipe.

[0022] It should be noted that by explicitly connecting one of the first connecting pipes 302 to the water inlet pipe and the other to the drain pipe, an independent cooling water circulation loop with a clear flow direction is established inside the upper mold 100. Similarly, the lower mold 200 also establishes an independent circulation loop through its corresponding second connecting pipe 305. This clearly defined inlet and outlet water design ensures that the cooling medium can flow stably and without interference in the serpentine first cooling pipe 301 and second cooling pipe 304. Combined with the turbulence effect generated by the baffle plate 307 in the pipe, it maximizes the cooling efficiency of the upper mold 100 and lower mold 200, ensures the uniformity of the temperature field in the mold cavity, and provides a stable and reliable basic cooling guarantee for the core demolding process.

[0023] Several heat-conducting pins 303 are evenly distributed on the upper mold 100, with one end of each heat-conducting pin 303 extending into the upper mold 100. The heat-conducting pins 303 are made of any one of copper, aluminum, or silver.

[0024] Furthermore, the heat-conducting pins 303 are made of high thermal conductivity materials such as copper, aluminum or silver, and are embedded in the upper mold 100 in an equally spaced manner. This optimized design enables the array of heat-conducting pins 303 to act like an efficient "heat conduction network", quickly and evenly extracting heat from inside the mold and conducting it to the surface of the mold.

[0025] The lower mold 200 is mounted on the molding frame 400, and a cooling fan 306 is mounted on the molding frame 400, with the cooling fan 306 facing the upper mold 100.

[0026] It should be noted that the cooling fan 306 blows air directly towards the upper mold 100. When the heat conduction pin 303 conducts internal heat to the mold surface and the exposed part of the heat conduction pin 303, the temperature in these areas rises. The forced airflow generated by the cooling fan 306 can greatly accelerate the airflow on the pin body and the mold surface. Through convection heat transfer, the heat accumulated here is quickly carried away and dissipated into the surrounding environment. This is equivalent to installing a "booster" for the heat dissipation effect of the heat conduction pin 303. Especially when the cooling water system is working intermittently or the ambient temperature is high, the cooling fan 306 can work continuously, effectively reducing the overall surface temperature of the mold. In conjunction with the internal water cooling system, it significantly shortens the cooling time of the mold, thereby shortening the entire molding cycle and improving production efficiency. Example

[0027] The basic content is the same as in Example 2, except that: Please see Figure 3 In this embodiment, the molding frame 400 is symmetrically provided with drive modules 41, and the upper mold 100 is symmetrically provided with connectors 42.

[0028] The connector 42 and the drive module 41 are located on the same vertical line, and the output end of the drive module 41 is connected to the connector 42.

[0029] It should be noted that the drive module 41 is connected to the control unit, and the control unit controls the output end of the drive module 41 to extend and retract at a uniform speed. The control unit is a technology known to those skilled in the art of molding machines, and will not be described in detail in this application.

[0030] Preferably, the drive module 41 is a cylinder in this application.

[0031] When the mold needs to be opened, the control unit commands the drive module 41 to move synchronously and pull the upper mold 100 vertically upward through the connector 42. Since the drive points are symmetrical and centered, the upper mold 100 is subjected to balanced force, achieving a smooth and vertical rise, thereby separating from the formed corrugated pipe and the lower mold 200 and completing the demolding. This process effectively prevents mold jamming, wear or scratches on the surface of the corrugated pipe caused by uneven force. When the mold needs to be closed for the next molding, the drive module 41 moves in the opposite direction to push the upper mold 100 downward smoothly and accurately to close with the lower mold 200. The precise alignment ensures the sealing of the mold cavity and the dimensional accuracy of the formed bellows.

[0032] In summary, the working principle of the demolding structure of this corrugated pipe forming machine is as follows: After the molding process is completed, external cooling water enters the first cooling pipe 301 and the second cooling pipe 304 arranged in a serpentine pattern through the water inlet of the first connecting pipe 302 and the second connecting pipe 305, which are respectively connected to the upper mold 100 and the lower mold 200. The serpentine pipe extends the flow path of the cooling water, while the baffles 307 arranged in a staggered manner in the pipe disrupt the laminar flow of water and form turbulent flow, which greatly enhances the heat exchange efficiency between the cooling water and the mold, ensuring that the upper mold 100 and the lower mold 200 can be cooled quickly and evenly, effectively avoiding the corrugated pipe deformation, surface defects or sticking phenomenon caused by local temperature difference; While the internal water cooling is in operation, the heat-conducting pins 303, which are evenly distributed on the upper mold 100, start to work. These heat-conducting pins 303, made of highly thermally conductive materials, quickly conduct heat from deep inside the mold or areas that are difficult for the cooling pipes to directly cover to the mold surface and the exposed parts of the pins. The cooling fan 306, which is set on the molding frame 400, starts at the same time, and its airflow blows directly onto the surface of the upper mold 100 and the heat-conducting pins 303. This forced convection cooling measure can quickly remove the heat accumulated on the heat-conducting pins 303 and the mold surface, further reducing the mold temperature. It is especially effective in water cooling intermittent or high-temperature environments, complementing the internal water cooling system and significantly shortening the cooling time. When the mold cools to the predetermined temperature and the corrugated pipe shrinks and solidifies, the control unit issues a command to start the symmetrically arranged drive module 41. The output end of the drive module 41, through the connector 42 located on the same vertical line, synchronously and vertically lifts the upper mold 100. Due to the symmetrical and centered driving force, the upper mold 100 achieves a smooth and non-skewed rise, thus successfully separating from the finished corrugated pipe and the lower mold 200, completing the demolding process. This smooth movement avoids mold jamming and product damage. When the mold is closed for the next molding, the drive module 41 moves in the opposite direction, pushing the upper mold 100 to close precisely, ensuring the quality of the next molding.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A demolding structure for a corrugated pipe forming machine, comprising an upper mold (100) and a lower mold (200) connected sequentially from top to bottom, characterized in that: The upper mold (100) is provided with a cooling demolding assembly (300); The cooling demolding assembly (300) includes a first cooling pipe (301) arranged in a serpentine pattern on the upper mold (100), and a first connecting pipe (302) connected to both ends of the first cooling pipe (301) on both sides of the upper mold (100). The upper mold (100) is provided with a plurality of heat-conducting pins (303). The lower mold (200) is provided with a second cooling pipe (304) arranged in a serpentine pattern. The lower mold (200) is provided with a second connecting pipe (305) connected to both ends of the second cooling pipe (304) on both sides. The first cooling pipe (301) and the second cooling pipe (304) are each provided with a plurality of staggered baffles (307).

2. The demolding structure of a corrugated pipe forming machine according to claim 1, characterized in that: One of the first connecting pipe fittings (302) is connected to an external cooling water inlet pipe, and the other of the first connecting pipe fittings (302) is connected to an external drainage pipe.

3. The demolding structure of a corrugated pipe forming machine according to claim 1, characterized in that: One of the second connecting pipe fittings (305) is connected to an external cooling water inlet pipe, and the other of the second connecting pipe fittings (305) is connected to an external drainage pipe.

4. The demolding structure of a corrugated pipe forming machine according to claim 1, characterized in that: Several heat-conducting needles (303) are evenly distributed on the upper mold (100), one end of each heat-conducting needle (303) extends into the upper mold (100), and the heat-conducting needle (303) is made of any one of copper, aluminum and silver.

5. The demolding structure of a corrugated pipe forming machine according to claim 1, characterized in that: The lower mold (200) is mounted on the molding frame (400), and a cooling fan (306) is mounted on the molding frame (400), with the cooling fan (306) facing the upper mold (100).

6. The demolding structure of a corrugated pipe forming machine according to claim 5, characterized in that: The molding frame (400) is symmetrically provided with drive modules (41), and the upper mold (100) is symmetrically provided with connectors (42).

7. The demolding structure of a corrugated pipe forming machine according to claim 6, characterized in that: The connector (42) and the drive module (41) are located on the same vertical line, and the output end of the drive module (41) is connected to the connector (42).

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