A runner plate injection molding mold with self-balancing convection structure

Abstract

The application relates to a runner plate injection molding mold with a self-balancing convection structure, which comprises a rack, a fixed mold, a movable mold, a driving mechanism provided with a plurality of driving cores, a sensing mechanism for detecting the reaction force of the cores on the driving mechanism, and a control center electrically connected with the driving mechanism and the sensing mechanism and used for controlling the driving mechanism according to the feedback of the sensing mechanism. When the driving mechanism starts core pulling after cooling after injection is completed, if the sensing mechanism detects that the force feedback of the cores is greater than a normal value but smaller than a locking value, the control center drives the cores to reciprocate through the driving mechanism until the sensing mechanism detects that the force feedback of the cores is normal, and then the core pulling is continued; if the sensing mechanism detects that the force feedback of the cores is greater than or equal to the locking value, the control center stops and alarms, so that the runner and the channel in the workpiece formed by injection molding are not prone to damage due to forced core pulling, and the cores of the mold are not prone to damage due to excessive friction force during forced core pulling.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and in particular to an injection mold with a runner plate having a self-balancing convection structure. Background Technology

[0002] The field of thermal management for new energy vehicles is developing towards lightweight, low cost, integration and high voltage insulation. Water-side flow channel plates, with their excellent insulation properties of polymer materials and the maturity of injection molding technology, have become the preferred solution to replace traditional metal flow channel components.

[0003] As the core water circuit integration component of the thermal management system, the water-side flow channel plate needs to integrate multiple loop channels such as motor cooling, battery thermal management, and cabin heating within a limited space. Relying on the microchannel structure with self-balancing convection characteristics, it can achieve precise distribution of coolant and efficient heat exchange.

[0004] To meet the requirements of high-voltage insulation and sealing reliability, these flow channel plates are mostly made using an integral injection molding process. However, in order to achieve the above-mentioned self-balancing convection structure, the product usually has a complex three-dimensional interlaced flow channel, which requires the injection mold to be equipped with a multi-directional core-pulling mechanism to form the internal features.

[0005] During the demolding stage, the plastic parts shrink and hug the core due to cooling, and the complex flow channel structure leads to uneven distribution of demolding force, which may cause core pulling jamming. Existing molds often force the core to be pulled out according to the established procedure when jamming occurs. At this time, the forced core pulling often causes the workpiece to be damaged or broken, and even the mold may be damaged, which seriously affects the yield and production safety. Summary of the Invention

[0006] To address the problem that traditional injection molds may damage the workpiece or the mold itself during demolding after injection molding of workpieces with complex channels, this application provides an injection mold with a runner plate having a self-balancing convection structure.

[0007] The injection molding die for a runner plate with a self-balancing convection structure provided in this application adopts the following technical solution: An injection mold for a runner plate with a self-balancing convection structure, comprising: The frame serves as the mounting base; The fixed mold is located on the frame; The moving mold is located on the frame; A drive mechanism, located on the frame, is provided in several parts, serving as the power source for driving the mold core; The sensing mechanism is used to connect the output end of the drive mechanism and the input end of the core, and is used to detect the reaction force exerted by the core on the drive mechanism; The control center, located on the frame, is electrically connected to the drive mechanism and the sensing mechanism, and is used to control the drive mechanism based on feedback from the sensing mechanism.

[0008] With the above technical solution, when the injection molding is completed and cooled, if the sensor detects that the force feedback of the core is greater than the normal value but less than the jamming value, the control center will drive the core to move back and forth through the drive mechanism until the sensor detects that the force feedback of the core is normal before continuing to pull the core. If the sensor detects that the force feedback of the core is greater than or equal to the jamming value, the control center will stop the machine and alarm. This makes it less likely that the flow channels and passages inside the injection molded workpiece will be damaged due to forced core pulling, and the mold core will also be less likely to be damaged due to excessive friction during forced core pulling.

[0009] Optionally, the sensing mechanism includes a first connecting plate and a second connecting plate that are circular. The first connecting plate is connected to the core of the mold, and the second connecting plate is connected to the driving mechanism. A connecting rod is provided on the side of the first connecting plate facing the second connecting plate. The connecting rod is connected to the second connecting plate through a sensing component, which is used to detect the force on the connecting rod.

[0010] Optionally, the second connecting plate has an installation cavity. The sensing component includes several pressure sensors and a detection plate. The pressure sensors are evenly arranged on the inner wall of the end of the installation cavity facing the first connecting plate. The pressure sensors are electrically connected to the control center. The detection plate is located in the installation cavity. The second connecting plate has a connection hole on the side facing the first connecting plate. One end of the connecting rod passes through the connection hole and is rigidly connected to the detection plate. When the drive mechanism pulls out the core, the detection plate presses the pressure sensors together.

[0011] Optionally, the detection plate slides into the mounting cavity.

[0012] Optionally, a plurality of pressure sensors are also uniformly provided on the end face of the mounting cavity away from the first mounting plate.

[0013] Optionally, the driving mechanism includes a mounting bracket slidably mounted on the frame, a support bracket rotatably mounted on the mounting bracket, a first support rod rotatably mounted on the support bracket, a second support rod slidably mounted on the first support rod, and a driving cylinder disposed on the second support rod. The output shaft of the driving cylinder is connected to the second connecting plate as the power source for the core. The rotation axis of the support bracket and the rotation axis of the first support rod are perpendicular to each other. The mounting bracket is provided with a first fixing member for fixing the support bracket, the support bracket is provided with a second fixing member for fixing the first support rod, and the first support rod is provided with a third fixing member for fixing the second support rod.

[0014] Optionally, the bracket is provided with a connecting shaft, which is rotatably mounted on the mounting frame. The connecting shaft and the mounting frame are plugged and pulled together. The first fixing member includes a first fixing bolt, one end of which passes through the mounting frame and is threadedly connected to the connecting shaft. The nut of the first fixing bolt abuts against the mounting frame. When the first fixing bolt is tightened, the bracket abuts against the mounting frame. The second fixing member includes a second fixing bolt and a fixing nut. The bracket and the end of the first support rod are rotatably connected by the second fixing bolt. The fixing nut is threadedly connected to one end of the second fixing bolt. After tightening the fixing nut, the end of the first support rod and the end of the bracket are abutted and fixed. Friction plates are provided between the bracket and the mounting frame, and between the bracket and the end of the first support rod. The friction plates are used to increase the friction between the bracket and the mounting frame, and between the bracket and the end of the first support rod.

[0015] Optionally, the third fixing member includes a fixing screw rotatably mounted on the first support rod and a push wheel coaxially disposed on the fixing screw, wherein the fixing screw passes through the second support rod and is threadedly engaged with the second support rod.

[0016] Optionally, the first support rod is tubular, the second support rod is slidably installed in the first support rod, the fixing screw is located inside the first support rod, the side wall of the first support rod is provided with a notch, the notch is used to expose one side of the push wheel so as to facilitate the rotation of the push wheel, and a set screw is threaded on the end of the first support rod. After tightening the set screw, one end of the set screw abuts against the end face of the push wheel.

[0017] Optionally, a fixed sleeve is slidably fitted on the connecting rod, one end of the fixed sleeve is provided with an external thread, the inner wall of the connecting hole is provided with an internal thread that is threadedly engaged with the external thread of the fixed sleeve, and the detection plate is clearance-fitted with the inner wall of the mounting cavity.

[0018] In summary, when the core-pulling process is initiated after injection molding and cooling, this application uses a sensing mechanism to collect the demolding resistance experienced by the core in real time. If the sensing mechanism detects that the force feedback of the core is greater than the normal value but less than the jamming value, the control center drives the core to move back and forth through the drive mechanism until the sensing mechanism detects that the force feedback of the core is normal before continuing core pulling. If the sensing mechanism detects that the force feedback of the core is greater than or equal to the jamming value, the control center stops the machine and alarms. This makes it less likely that the flow channels and passages inside the injection-molded workpiece will be damaged due to forced core pulling, and the mold core will not be damaged due to excessive friction during forced core pulling. At the same time, by monitoring the force feedback during the core pulling process in real time through the sensing mechanism, precise control and adaptive adjustment of the core pulling process can be achieved. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of this application.

[0020] Figure 2 This is a three-dimensional structural diagram of the driving mechanism and sensing mechanism of this application.

[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0022] Figure 4 yes Figure 2 Enlarged schematic diagram of section B.

[0023] Figure 5 This is a three-dimensional structural diagram of the drive mechanism and sensing mechanism of this application, with some of the mounting brackets removed from the diagram.

[0024] Figure 6 This application is Figure 5 An enlarged schematic diagram of section C.

[0025] Figure 7 This is a cross-sectional schematic diagram of the sensing mechanism of this application.

[0026] Figure 8 This is a cross-sectional view of the mounting bracket of the drive mechanism of this application.

[0027] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0028] Reference numerals: 1. Frame; 11. Fixed mold; 12. Moving mold; 2. Drive mechanism; 21. Mounting bracket; 22. Support; 221. Connecting shaft; 23. First support rod; 231. Set screw; 232. Notch; 24. Second support rod; 25. Drive cylinder; 3. Sensing mechanism; 31. First connecting plate; 32. Second connecting plate; 321. Connecting hole; 322. Mounting cavity; 33. Connecting rod; 34. Sensing assembly; 341. Pressure sensor; 342. Detection plate; 4. First fixing member; 41. First fixing bolt; 5. Second fixing member; 51. Second fixing bolt; 52. Fixing nut; 6. Third fixing member; 61. Fixing screw; 62. Push wheel; 7. Friction plate; 8. Fixing sleeve. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0030] This application discloses an injection molding die for a flow channel plate with a self-balancing convection structure, including a frame 1, a fixed mold 11, a moving mold 12, a drive mechanism 2, a sensing mechanism 3, and a control center.

[0031] The frame 1 serves as the overall mounting base and is fixedly installed at the corresponding station of the injection molding machine. The fixed mold 11 and the moving mold 12 are respectively installed at the corresponding positions on the frame 1, and the two cooperate to form the molding cavity.

[0032] The driving mechanism for the fixed mold 11 and the moving mold 12 is existing technology, and those skilled in the art can select it according to the actual situation. The driving mechanism 2 is provided in several parts and is also located on the frame 1. The driving mechanism 2 is connected to the core of the fixed mold 11 and the moving mold 12 through the sensing mechanism 3. The driving mechanism 2 serves as the power for pushing the mold core and pulling the core.

[0033] The control center is also located on the frame 1. The control center is electrically connected to the sensing mechanism 3. The control center is used to control the movement of the mold core through the drive mechanism 2 based on the feedback from the sensing mechanism 3.

[0034] When core pulling is required after the injection molding cycle is completed, drive mechanism 2 is activated, pulling the core out of the complex flow channel of the formed runner plate. When the core gets stuck during the core pulling process due to the complex flow channel structure or slight deformation of the workpiece, the core will be subjected to a reaction force greater than the normal core pulling resistance.

[0035] At this time, the sensing mechanism 3 captures the reaction force signal in real time and transmits it to the control center. If the control center determines that the reaction force is greater than the preset normal threshold but less than the jamming threshold that may damage the workpiece or mold, the control center will control the drive mechanism 2 to drive the core to perform small-stroke reciprocating movements. Through multiple small forward and backward movements, the clamping force between the core and the workpiece will be loosened until the force value fed back by the sensing mechanism 3 returns to normal. Then, the drive mechanism 2 will be controlled to continue to complete the core pulling action.

[0036] If the control center determines that the reaction force is greater than or equal to the jamming threshold, it will immediately control the drive mechanism 2 to stop and sound an alarm, prompting the operator to intervene and handle the situation, thereby effectively avoiding the tearing or cracking of the workpiece flow channel or damage to the mold core caused by forced core pulling.

[0037] The sensing mechanism 3 includes a circular rigid first connecting plate 31 and a circular rigid second connecting plate 32. The first connecting plate 31 is coaxially fixedly connected to the end of the mold core, and the second connecting plate 32 is connected to the output end of the drive mechanism 2.

[0038] A connecting rod 33 is coaxially fixedly installed on the side of the first connecting plate 31 facing the second connecting plate 32. The second connecting plate 32 has an installation cavity 322 inside, which is cylindrical and coaxial with the second connecting plate 32.

[0039] The second connecting plate 32 has a connecting hole 321 coaxially opened on one end face facing the first connecting plate 31. The connecting hole 321 is connected to the mounting cavity 322. The end of the connecting rod 33 away from the first connecting plate 31 passes through the connecting hole 321 and extends into the mounting cavity 322. The connecting rod 33 has no contact with the second connecting plate 32.

[0040] The connecting rod 33 is provided with a sensing component 34, which includes a detection plate 342 that is coaxially and integrally disposed on the end face of the end of the connecting rod 33 that extends into the mounting cavity 322. Both the connecting rod 33 and the detection plate 342 are rigid. The detection plate 342 is circular and slides with the cylindrical end of the mounting cavity 322. The detection plate 342 is clearance-fitted with the inner wall of the mounting cavity 322.

[0041] The sensing assembly 34 also includes a plurality of pressure sensors 341, which are uniformly fixedly installed on the end faces of both ends of the mounting cavity 322. When the driving mechanism 2 drives the core to pull the core through the sensing mechanism 3, the reaction force of the core is detected by the cooperation between the pressure sensor 341 at the end of the mounting cavity 322 near the first mounting plate and the detection plate 342. When the driving mechanism 2 pushes the core through the sensing mechanism 3, the reaction force of the core is detected by the cooperation between the pressure sensor 341 at the end of the mounting cavity 322 away from the first mounting plate and the detection plate 342.

[0042] The drive mechanism 2 corresponds one-to-one with the mold core. The drive mechanism 2 includes a mounting frame 21 that is horizontally slidably mounted on the frame 1, a bracket 22 provided on the mounting frame 21, a first support rod 23 provided on the bracket 22, a second support rod 24 provided on the first support rod 23, and a drive cylinder 25 provided on the second support rod 24.

[0043] The bracket 22 is circular, and a connecting shaft 221 is coaxially fixedly mounted on one end of the bracket 22. The connecting shaft 221 passes through the mounting bracket 21 and is rotatably connected to the mounting bracket 21 via a bearing. The connecting shaft 221 and the bearing are in sliding fit. The mounting bracket 21 is provided with a first fixing member 4, which includes a first fixing bolt 41. One end of the first fixing bolt 41 passes through the mounting bracket 21 and is coaxially threadedly connected to the end of the connecting shaft 221 away from the bracket 22. The bolt head of the first fixing bolt 41 is fitted and pressed against the mounting bracket 21.

[0044] The connecting shaft 221 is fitted with an annular friction plate 7, which is located between the bracket 22 and the mounting bracket 21. When the first fixing bolt 41 is tightened, the first fixing bolt 41 pulls the bracket 22 to fit against the mounting bracket 21. At this time, both sides of the friction plate 7 fit against the bracket 22 and the mounting bracket 21 respectively, which increases the friction between the mounting bracket 21 and the bracket 22. The greater friction makes the fixation between the bracket 22 and the mounting bracket 21 more stable and less likely to occur relative rotation between the mounting bracket 21 and the bracket 22.

[0045] The first support rod 23 is rotatably mounted on one end of the bracket 22. The rotation axis of the bracket 22 is perpendicular to the sliding surface of the mounting frame 21, the rotation axis of the first support rod 23 is parallel to the sliding surface of the mounting frame 21, and the rotation axis of the bracket 22 intersects and is perpendicular to the rotation axis of the first support rod 23.

[0046] The bracket 22 is provided with a second fixing member 5, which includes a second fixing bolt 51 and a fixing nut 52. The fixing nut 52 is embedded in the end of the first support rod 23. One end of the second fixing bolt 51 slides through one end of the bracket 22 and one end of the first support rod 23 in sequence and is threadedly connected to the fixing nut 52. The side wall of the part of the second fixing bolt 51 that slides with the bracket 22 is smooth.

[0047] When the first support rod 23 needs to be fixed to the bracket 22, the second fixing bolt 51 is tightened, so that the bolt head of the second fixing bolt 51 fits against the bracket 22, thereby locking the first support rod 23 to the bracket 22. An annular friction plate 7 is also fitted on the second fixing bolt 51. The friction plate 7 is located between the end of the bracket 22 and the end of the first support rod 23. When the second fixing bolt 51 is tightened, both sides of the friction plate 7 fit against the bracket 22 and the first support rod 23 respectively, further enhancing the positioning stability of the connection.

[0048] The first support rod 23 is in the shape of a square tube, and the second support rod 24 is slidably installed in the first support rod 23. The first support rod 23 is provided with a third fixing member 6, which includes a fixing screw 61 rotatably installed inside the first support rod 23 and a push wheel 62 coaxially fixedly installed at one end of the fixing screw 61.

[0049] One end of the fixing screw 61 passes through one end of the second support rod 24 and is threaded into the second support rod 24. A notch 232 is provided on the side wall of the first support rod 23 away from the second support rod 24. The push wheel 62 is located at the notch 232, with its outer edge protruding from the notch 232 for easy manual rotation by the operator. When the operator rotates the push wheel 62, the fixing screw 61 rotates accordingly, thereby driving the second support rod 24 to slide axially along the first support rod 23. Simultaneously, a set screw 231 is threaded onto the end face of the first support rod 23. After tightening the set screw 231, one end of the set screw 231 passes through the end face of the first support rod 23 and abuts against the end face of the push wheel 62, thus locking the push wheel 62 and the fixing screw 61 in place.

[0050] One end of the drive cylinder 25 is coaxially fixedly mounted on the end of the second support rod 24 away from the first support rod 23, and the end of the piston rod of the drive cylinder 25 is coaxially fixedly connected to the second connecting plate 32.

[0051] In this embodiment, the drive cylinder 25 is an electric cylinder. However, when a large pushing and pulling force is required and the heat dissipation conditions are poor, the drive cylinder 25 can also be a hydraulic cylinder.

[0052] During installation, first move the mounting bracket 21 to the position corresponding to the core, rotate the bracket 22 and the first support rod 23, and slide the second support rod 24 so that the first connecting plate 31 fits and aligns with the end of the core, and then fix the first connecting plate 31 to the end of the core with bolts.

[0053] Then, the first fixing bolt 41 and the second fixing bolt 51 are pre-tightened. Then, the drive cylinder 25 is started to make the piston rod fully extend. Then, the push wheel 62 is rotated to push the second support rod 24 to extend. Through the cooperation between the drive cylinder 25 and the second support rod 24, the first connecting plate 31 and the second connecting plate 32 are pushed to move the core to the preset position, thus completing the positioning of the core.

[0054] Then, the drive wheel 62 continues to rotate, driving the fixed lead screw 61 to rotate. This causes the reaction force of the core to push the first connecting plate 31, the connecting rod 33, and the detection plate 342 against the pressure sensor 341 at the end face of the mounting cavity 322 away from the first connecting plate 31. Because of the clearance fit between the detection plate 342 and the inner wall of the mounting cavity 322, the detection plate 342 will not rub against the inner wall of the mounting cavity 322 during movement. This ensures that the pressure sensor 341 can accurately collect the reaction force data of the core. Then, the rotation amount of the bracket 22, the first support rod 23, and the extension amount of the second support rod 24 are finely adjusted by the pressure values ​​of each part displayed by the control center until the values ​​of each pressure sensor 341 are all within the preset range, thereby ensuring the accuracy and stability of the core positioning.

[0055] Meanwhile, a fixing sleeve 8 is slidably fitted on the connecting rod 33. One end of the fixing sleeve 8 is provided with an external thread, and the inner wall of the connecting hole 321 is provided with an internal thread that is threadedly engaged with the external thread of the fixing sleeve 8. After the adjustment is completed, tighten the first fixing bolt 41 and the second fixing bolt 51, and tighten the set screw 231 at the same time to lock the bracket 22, the first support rod 23, the push wheel 62 and the fixing screw 61.

[0056] Finally, the fixing sleeve 8 is screwed into the connecting hole 321, so that the fixing sleeve 8 and the second connecting plate 32 are fixed together. The fixing sleeve 8 limits the connecting rod 33. Compared with the sliding fit between the detection plate 342 and the mounting cavity 322, the friction between the fixing sleeve 8 and the connecting rod 33 is smaller, thereby further improving the accuracy of the data collected by the pressure sensor 341.

[0057] 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 flow channel plate injection molding die with a self-balancing convection structure, characterized in that, include: The frame (1) serves as the mounting base; A fixed mold (11) is provided on the frame (1); The moving mold (12) is located on the frame (1). A drive mechanism (2) is provided on the frame (1) and is provided in several parts, serving as the power source for driving the core; The sensing mechanism (3) is used to connect the output end of the driving mechanism (2) and the input end of the core, and is used to detect the reaction force applied by the core to the driving mechanism (2); The control center, located on the frame (1), is electrically connected to the drive mechanism (2) and the sensing mechanism (3) and is used to control the drive mechanism (2) based on the feedback from the sensing mechanism (3).

2. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 1, characterized in that: The sensing mechanism (3) includes a first connecting plate (31) and a second connecting plate (32) that are circular. The first connecting plate (31) is connected to the core of the mold, and the second connecting plate (32) is connected to the driving mechanism (2). The first connecting plate (31) has a connecting rod (33) on the side facing the second connecting plate (32). The connecting rod (33) is connected to the second connecting plate (32) through a sensing component (34). The sensing component (34) is used to detect the force on the connecting rod (33).

3. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 2, characterized in that: The second connecting plate (32) has an installation cavity (322). The sensing component (34) includes several pressure sensors (341) and a detection plate (342). The pressure sensors (341) are evenly arranged on the inner wall of the end of the installation cavity (322) facing the first connecting plate (31). The pressure sensors (341) are electrically connected to the control center. The detection plate (342) is located in the installation cavity (322). The second connecting plate (32) has a connection hole (321) on the side facing the first connecting plate (31). One end of the connecting rod (33) passes through the connection hole (321) and is rigidly connected to the detection plate (342). When the driving mechanism (2) pulls out the core, the detection plate (342) presses the pressure sensors (341) together.

4. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 3, characterized in that: The detection plate (342) slides into the mounting cavity (322).

5. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 3, characterized in that: The end face of the mounting cavity (322) away from the first connecting plate (31) is also uniformly provided with a number of pressure sensors (341). The pressure sensors (341) are used to detect the reaction force on the detection plate (342) when the core is pushed.

6. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 2, characterized in that: The drive mechanism (2) includes a mounting frame (21) slidably mounted on the frame (1), a bracket (22) rotatably mounted on the mounting frame (21), a first support rod (23) rotatably mounted on the bracket (22), a second support rod (24) slidably mounted on the first support rod (23), and a drive cylinder (25) provided on the second support rod (24). The output shaft of the drive cylinder (25) is connected to the second connecting plate (32) as the power source for the core. The rotation axis of the bracket (22) and the rotation axis of the first support rod (23) are perpendicular to each other. The mounting frame (21) is provided with a first fixing member (4) for fixing the bracket (22). The bracket (22) is provided with a second fixing member (5) for fixing the first support rod (23). The first support rod (23) is provided with a third fixing member (6) for fixing the second support rod (24).

7. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 6, characterized in that: The bracket (22) is provided with a connecting shaft (221), which is rotatably mounted on the mounting frame (21). The connecting shaft (221) and the mounting frame (21) are engaged in a plug-in fit. The first fixing member (4) includes a first fixing bolt (41), one end of which passes through the mounting frame (21) and is threadedly connected to the connecting shaft (221). The nut of the first fixing bolt (41) abuts against the mounting frame (21). When the first fixing bolt (41) is tightened, the bracket (22) abuts against the mounting frame (21). The second fixing member (5) includes a second fixing bolt (51). The bracket (22) and the first support rod (23) are rotatably connected by a second fixing bolt (51). The fixing nut (52) is threaded to one end of the second fixing bolt (51). After tightening the fixing nut (52), the end of the first support rod (23) is abutted against the end of the bracket (22). Friction plates (7) are provided between the bracket (22) and the mounting bracket (21), and between the bracket (22) and the end of the first support rod (23). The friction plates (7) are used to increase the friction between the bracket (22) and the mounting bracket (21), and between the bracket (22) and the end of the first support rod (23).

8. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 7, characterized in that: The third fixing member (6) includes a fixing screw (61) rotatably mounted on the first support rod (23) and a push wheel (62) coaxially disposed on the fixing screw (61). The fixing screw (61) passes through the second support rod (24) and is threadedly engaged with the second support rod (24).

9. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 8, characterized in that: The first support rod (23) is tubular, and the second support rod (24) is slidably installed in the first support rod (23). The first support rod (23) and the second support rod (24) are circumferentially fixed. The fixing screw (61) is located inside the first support rod (23). The side wall of the first support rod (23) is provided with a notch (232). The notch (232) is used to expose one side of the push wheel (62) so as to facilitate the rotation of the push wheel (62). The end of the first support rod (23) is threaded with a set screw (231). After tightening the set screw (231), one end of the set screw (231) abuts against the end face of the push wheel (62).

10. The injection mold for a flow channel plate with a self-balancing convection structure according to claim 4, characterized in that: A fixed sleeve (8) is slidably sleeved on the connecting rod (33). One end of the fixed sleeve (8) is provided with an external thread. The inner wall of the connecting hole (321) is provided with an internal thread that is threadedly engaged with the external thread of the fixed sleeve (8). The detection plate (342) and the inner wall of the mounting cavity (322) are in clearance fit.

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