Die ejector pin reset detection sensor

Abstract

The invention relates to the technical field of mold detection, and discloses a mold ejector pin reset detection sensor which comprises first electric telescopic rods, the multiple first electric telescopic rods are fixedly connected to the four corners of the interior of a mold frame correspondingly, and the tops of the first electric telescopic rods are fixedly connected with ejection blocks. And a second electric telescopic rod is fixedly connected to the middle of the top end of the inner side of the mold frame, a connecting plate is fixedly connected to the bottom end of the second electric telescopic rod, sealing rings are fixedly connected to the periphery of the outer portion of the connecting plate, and the inner sides of the sealing rings are slidably connected with the first electric telescopic rod. A first electric telescopic rod is started to push an ejection block to form an ejector pin structure, a machined workpiece can be taken out, and in order to prevent workpiece burrs caused by a gap between an ejector pin and a mold frame, a second electric telescopic rod is started after the mold frame is filled with gas, and the second electric telescopic rod stretches out and draws back to drive a connecting plate and a sealing ring to move; therefore, the sealing performance of the ejector pin after resetting is quickly judged.

Description

Technical Field

[0001] This invention relates to the field of mold inspection technology, specifically to a mold ejector pin reset detection sensor. Background Technology

[0002] Ejector pins are key components used to eject plastic parts and castings from the mold cavity or core after the mold is formed. They are mounted on the ejector plate of the mold and reciprocate with the ejector plate during operation. Through stable thrust, they allow the molded product to smoothly leave the mold, avoiding product deformation or damage. They are widely used in injection molds and die casting molds. In order to facilitate the detection of whether the ejector pin has been fully reset, a mold ejector pin reset detection sensor is needed.

[0003] The mold ejector pin reset detection sensor is a key component for monitoring whether the mold ejector pins have accurately returned to their initial positions. It is installed on the mold ejector plate or the corresponding detection position. After the ejector pin completes the ejection action, it determines whether the ejector pin has reset by sensing. If it has not reset, it triggers a signal to prevent damage to the mold or product due to ejector pin misalignment when the mold is closed, thus ensuring the safe and smooth production process of injection molding and die casting molds.

[0004] Currently available mold ejector pin reset detection sensors consist of a mechanical trigger component and a position sensing structure. During use, the mechanical trigger component directly contacts the ejector pin to capture its movement trajectory. To improve the immediacy of detection, existing technologies optimize the sensitivity and response stroke of the mechanical trigger component to quickly capture the ejector pin reset action. To initially determine whether the ejector pin has returned to its original position, existing technologies use observation of the ejector pin's height to detect reset. However, this method only confirms the height of the ejector pin and is insufficient for detecting the sealing performance after reset. Furthermore, its accuracy is insufficient when mold components wear down after long-term use, affecting the subsequent workpiece machining accuracy and mold lifespan, thus reducing the reliability of the device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a mold ejector pin reset detection sensor, which solves the problem of insufficient detection of the sealing performance after ejector pin reset.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mold ejector pin reset detection sensor, comprising a mold frame, wherein a sealing mechanism is provided in the middle of the inner side of the mold frame, the sealing mechanism being used to accurately detect the sealing performance of the device; a detection mechanism is provided in the front inner side of the mold frame, the detection mechanism being used to quickly detect the reset status of the device; and a positioning mechanism is provided at the bottom of the mold frame, the positioning mechanism being able to improve the stability of the device. The sealing mechanism includes an electric telescopic rod 1, and multiple electric telescopic rods 1 are respectively fixedly connected to the four corners inside the mold frame. An ejector block is fixedly connected to the top of the electric telescopic rod 1. An electric telescopic rod 2 is fixedly connected to the middle of the top of the inner side of the mold frame. A connecting plate is fixedly connected to the bottom of the electric telescopic rod 2. Sealing rings are fixedly connected to the outer perimeter of the connecting plate. The inner side of the sealing rings is slidably connected to the electric telescopic rod 1. An indicator component is provided on the inner side of the mold frame. A conveying component is provided on the outer side of the mold frame. A protective component is provided on the top of the mold frame.

[0007] Preferably, the detection mechanism includes a fan connected to the middle of the front side of the mold frame. A wind plate is rotatably connected to the front inside of the mold frame. A gear one is fixedly connected to the left side of the wind plate. A counting roller is rotatably connected to the left side of the front end inside the mold frame. A gear two is fixedly connected to the right side of the counting roller. The gear two meshes with the gear one. A sealing component is provided on the left side of the front end of the mold frame.

[0008] Preferably, the positioning mechanism includes a rack 1, multiple racks 1 are rotatably connected to the top periphery of the mold frame, rotating columns are rotatably connected to the bottom periphery of the inner side of the mold frame, gears 3 are fixedly connected to the outer side of the rotating columns, gears 3 mesh with rack 1, multiple racks 2 are slidably connected to the bottom of the inner side of the mold frame, suction cups are fixedly connected to the bottom of racks 2, and a reset component is provided on the outer side of racks 2.

[0009] Preferably, the indicating component includes a spring telescopic tube, two spring telescopic tubes are respectively fixedly connected to the left and right sides of the top of the mold frame, a button is fixedly connected to the bottom of the spring telescopic tube, and an indicator light is fixedly connected to the right side of the front end of the mold frame, and the button and the indicator light are electrically connected.

[0010] Preferably, the handling assembly includes handles, and two handles are respectively fixedly connected to the left and right sides of the outside of the mold frame, with a protective sleeve fixedly connected to the outside of the handles.

[0011] Preferably, the protective component includes a protective plate, which is disposed on the top of the mold frame. Mounting plates are fixedly connected to the left and right sides of the top of the protective plate, and the protective plate is engaged with the mold frame through the mounting plates.

[0012] Preferably, the sealing mechanism further includes guide rods, a plurality of guide rods being slidably connected to the inside periphery of the connecting plate, and the top of the guide rods being fixedly connected to the mold frame.

[0013] Preferably, the sealing assembly includes a sealing cover, which is connected to the left front end of the mold frame, and an observation window is fixedly connected to the inner side of the sealing cover.

[0014] Preferably, the reset assembly includes connecting blocks, and multiple connecting blocks are respectively fixedly connected to the outer side of the corresponding rack two. A spring telescopic rod two is fixedly connected to the top of the connecting block, and the top of the spring telescopic rod two is fixedly connected to the mold frame.

[0015] Preferably, the positioning mechanism includes a support cover, which is slidably connected to the outside of the mold frame, and the inside of the support cover is fixedly connected to a sealing ring.

[0016] This invention provides a mold ejector pin reset detection sensor. It has the following beneficial effects: 1. This invention uses an electric telescopic rod to push the ejector block to form an ejector pin structure. After processing, the workpiece can be removed from the mold frame. To avoid gaps between the ejector pin and the mold frame that could cause burrs on the workpiece, gas must first be injected into the mold frame. After the mold frame is filled with air, the electric telescopic rod is activated. Its telescopic movement will pull the connecting plate and the sealing ring to try to move them up and down. If the ejector pin structure is properly sealed, the electric telescopic rod will not be able to move the sealing ring. By observing whether the sealing ring moves, the sealing performance after the ejector pin is reset can be quickly determined, thereby improving the reliability of the device.

[0017] 2. This invention injects air into the device by activating a fan during testing. The airflow causes the fan plate to rotate, which in turn drives gear one to rotate synchronously. Gear one then drives gear two, which in turn drives the counting roller to rotate. If the pin returns to its normal position and the device remains sealed, the air injection time is fixed. If the seal is insufficient and gas leakage prevents the device from being fully filled, the counting roller will continue to rotate. By observing whether the numbers on the counting roller change, the current sealing status of the device can be accurately determined, thereby improving the convenience of the device.

[0018] 3. Before using the device, the suction cup is used to fix the device in place. When the device is running, the vibration generated by processing or stamping will cause the device to shake. The shaking of the mold frame will drive the rack on it to move. The movement of the rack will drive the gear three and the rotating column that mesh with it to rotate. When the gear three rotates, it will push the meshing rack two to move. The pressing and pulling action of the rack two can tighten the suction cup. The overall stability is improved by the vibration of the device itself, thereby improving the stability when the ejector pin is reset. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a partial structural illustration of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a schematic diagram of the guide rod structure of the present invention; Figure 6 This is a partial structural exploded view of the sealing mechanism of the present invention; Figure 7 This is a partial structural exploded view of the detection mechanism of the present invention; Figure 8 This is a partial structural diagram of the positioning mechanism of the present invention.

[0020] The components include: 1. Mold frame; 2. Sealing mechanism; 21. Electric telescopic rod one; 22. Ejection block; 23. Electric telescopic rod two; 24. Connecting plate; 25. Sealing ring; 26. Indicator assembly; 261. Spring telescopic tube one; 262. Button; 263. Indicator light; 27. Handling assembly; 271. Handle; 272. Protective sleeve; 28. Protective assembly; 281. Protective plate; 282. Mounting plate; 29. ​​Guide rod; 3. Detection mechanism; 31. Fan; 32. Air plate; 33. Gear one; 34. Gear two; 35. Counting roller; 36. Sealing assembly; 361. Sealing cover; 362. Observation window; 4. Positioning mechanism; 41. Rack one; 42. Rotating column; 43. Gear three; 44. Rack two; 45. Suction cup; 46. Reset assembly; 461. Spring telescopic rod two; 462. Connecting block; 47. Support cover. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Figure 3 , Figure 5 and Figure 6 The present invention provides a mold ejector pin reset detection sensor, including a mold frame 1, a sealing mechanism 2 is provided in the middle of the inner side of the mold frame 1, the sealing mechanism 2 is used to accurately detect the sealing performance of the device, a detection mechanism 3 is provided in the front of the inner side of the mold frame 1, the detection mechanism 3 is used to quickly detect the reset status of the device, and a positioning mechanism 4 is provided at the bottom of the mold frame 1, the positioning mechanism 4 can improve the stability of the device. The sealing mechanism 2 includes an electric telescopic rod 21. Multiple electric telescopic rods 21 are fixedly connected to the four corners inside the mold frame 1. An ejector block 22 is fixedly connected to the top of the electric telescopic rod 21. Activating the electric telescopic rod 21 can drive the ejector block 22 to move. An electric telescopic rod 23 is fixedly connected to the middle of the top of the inner side of the mold frame 1. A connecting plate 24 is fixedly connected to the bottom of the electric telescopic rod 23. Sealing rings 25 are fixedly connected to the outer perimeter of the connecting plate 24. Activating the electric telescopic rod 23 can drive the connecting plate 24 and the sealing rings 25 to move. The inner side of the sealing rings 25 is slidably connected to the electric telescopic rod 21. The sealing rings 25 will move along the sealing rings 25. An indicator component 26 is provided on the inner side of the mold frame 1. A conveying component 27 is provided on the outer side of the mold frame 1. A protective component 28 is provided on the top of the mold frame 1. Specifically, activating the electric telescopic rod 21 pushes the ejector block 22 to form an ejector pin structure, which is used to remove the workpiece from the mold frame 1 after processing. To avoid burrs on the workpiece due to gaps between the ejector pin and the mold frame 1, the sealing performance after the ejector pin is reset needs to be tested. First, gas is injected into the mold frame 1. After the cavity is filled with air, the electric telescopic rod 23 is activated. When the electric telescopic rod 23 extends and retracts, it will simultaneously drive the connecting plate 24 and the sealing ring 25 to attempt to move up and down. If the ejector pin structure has good sealing performance and the air pressure in the mold frame 1 cavity is stable, the electric telescopic rod 23 will not be able to push the sealing ring 25 to move. Otherwise, the sealing ring 25 will move with the extension and retraction of the electric telescopic rod 23. Based on this, by observing the state of the sealing ring 25 after activating the electric telescopic rod 23, the sealing performance after the ejector pin is reset can be quickly determined.

[0023] Reference Figure 2 , Figure 4 and Figure 7 The detection mechanism 3 includes a blower 31, which is connected to the middle of the front side of the mold frame 1. A wind plate 32 is rotatably connected to the front side of the interior of the mold frame 1. The wind plate 32 will rotate with the start of the blower 31. A gear 33 is fixedly connected to the left side of the wind plate 32. The rotation of the wind plate 32 will drive the gear 33 to rotate. A counting roller 35 is rotatably connected to the left side of the front end of the interior of the mold frame 1. A gear 34 is fixedly connected to the right side of the counting roller 35. The gear 34 meshes with the gear 33. When the gear 33 rotates, it will drive the gear 34 and the counting roller 35 to rotate. A sealing component 36 is provided on the left side of the front end of the mold frame 1. Specifically, during the testing process, starting the blower 31 injects gas into the device. When the airflow flows, it drives the air vane 32 inside the device to rotate. As the air vane 32 rotates, it drives the gear 33 mounted on it to rotate synchronously. Since gear 33 and gear 34 are in a meshing state, the rotation of gear 33 will further drive gear 34 to rotate. Gear 34 is connected to the counting roller 35. Finally, the rotation of gear 34 will cause the counting roller 35 to operate and display a number. If the ejector pin is reset normally, the inside of the device remains sealed and the injected gas will not leak. After the gas pressure inside the cavity reaches a stable value, the airflow will stop driving the air vane 32 to rotate, and the counting roller 35 will also stop operating, and the displayed number will be fixed. If the device is not sealed properly, the injected gas will continue to leak, the airflow will always drive the air vane 32 to rotate, and the counting roller 35 will also continue to operate, and the displayed number will continuously change. Therefore, by observing whether the number displayed on the counting roller 35 changes, the sealing status of the current device can be accurately determined.

[0024] Reference Figure 3 , Figure 3 and Figure 8 The positioning mechanism 4 includes a rack 41, and multiple racks 41 are rotatably connected to the top of the mold frame 1. The racks 41 will move with the vibration of the device. Rotating columns 42 are rotatably connected to the bottom of the inner side of the mold frame 1. Gears 43 are fixedly connected to the outer side of the rotating columns 42. Gears 43 mesh with racks 41. Moving racks 41 will push rotating columns 42 and gears 43 to rotate. Multiple racks 44 are slidably connected to the bottom of the inner side of the mold frame 1. A suction cup 45 is fixedly connected to the bottom of racks 44. When gears 43 rotate, they will drive racks 44 and improve the fixation of suction cups 45. A reset component 46 is provided on the outer side of racks 44. Specifically, before use, the suction cup 45 can be used to fix the device on the working surface. During the operation of the device, the vibration generated by the processing or stamping process will cause the device to shake, and the mold frame 1 will also move synchronously with the shaking. Since the rack 41 is assembled on the mold frame 1, the displacement of the mold frame 1 will directly drive the rack 41 to move. The rack 41 meshes with the gear 43, and its movement will drive the gear 43 to rotate. The gear 43 is coaxially connected with the rotating column 42, which in turn drives the rotating column 42 to rotate synchronously. At the same time, the gear 43 also meshes with the rack 44. The rotation of the gear 43 will generate pressing and pulling forces on the rack 44, causing the rack 44 to move. The rack 44 is connected to the suction cup 45 through transmission, and its displacement will further tighten the suction cup 45, enhancing the suction force between the suction cup 45 and the working surface. Through this linkage structure, the device can use the vibration generated by its own operation to achieve self-improvement in stability, thereby ensuring the accuracy and stability of the ejector pin during reset.

[0025] Reference Figure 3, Figure 5 and Figure 6 The indicating component 26 includes a spring telescopic tube 261. Two spring telescopic tubes 261 are fixedly connected to the left and right sides of the top of the mold frame 1. A button 262 is fixedly connected to the bottom of the spring telescopic tube 261. The extension and buffering of the spring telescopic tube 261 will protect the button 262. An indicator light 263 is fixedly connected to the right side of the front end of the mold frame 1. The button 262 and the indicator light 263 are electrically connected. When the button 262 is activated by the collision of the connecting plate 24, the indicator light 263 will be turned on. The handling component 27 includes a handle 271. Two handles 271 are fixedly connected to the left and right sides of the outside of the mold frame 1. A protective sleeve 272 is fixedly connected to the outside of the handle 271. The handle 271 and the protective sleeve 272 make it easy to handle and hold the device. Specifically, the button 262 at the bottom of the spring telescopic tube 261 can be activated when the connecting plate 24 moves. At this time, the button 262 will turn on the indicator light 263, which will remind the user that the current device is not sealed properly, which will affect the subsequent mold processing. The spring telescopic tube 261 will prevent the connecting plate 24 from damaging the button 262 when it moves by its own extension and buffering. The handle 271 makes it easy to carry and operate the device, and the protective cover 272 can improve the comfort of holding it.

[0026] Reference Figure 1 , Figure 6 and Figure 7 The protective assembly 28 includes a protective plate 281, which is disposed on the top of the mold frame 1. Mounting plates 282 are fixedly connected to the left and right sides of the top of the protective plate 281. The protective plate 281 is engaged with the mold frame 1 through the mounting plates 282. The protective plate 281 fixed by the mounting plates 282 can protect the mold frame 1. The sealing mechanism 2 also includes guide rods 29. Multiple guide rods 29 are slidably connected to the inner periphery of the connecting plate 24. The top of the guide rods 29 is fixedly connected to the mold frame 1. Sliding along the guide rods 29 can improve the stability of the movement of the connecting plate 24. The sealing assembly 36 includes a sealing cover 361, which is connected to the left front end of the mold frame 1. An observation window 362 is fixedly connected to the inner side of the sealing cover 361. The counting roller 35 can be observed through the observation window 362 while maintaining the sealing. Specifically, the mounting plate 282 allows the installation of a protective plate 281 when the device is not in use. This protective plate 281 prevents external impurities and dust from entering the mold frame 1 and affecting processing and production during use. The sliding and limiting of the guide rod 29 improves the stability of the connecting plate 24 when it moves up and down. By observing the observation window 362 on the sealing cover 361, the numbers on the counting roller 35 can be observed while maintaining a tight seal.

[0027] Reference Figure 1 , Figure 3 and Figure 8 The reset assembly 46 includes a connecting block 462, with multiple connecting blocks 462 fixedly connected to the outer side of the corresponding rack 44. A spring telescopic rod 461 is fixedly connected to the top of the connecting block 462, and the top of the spring telescopic rod 461 is fixedly connected to the mold frame 1. The rack 44 can be reset by the extension and retraction of the spring telescopic rod 461 through the connecting block 462. The positioning mechanism 4 includes a support cover 47, which is slidably connected to the outer side of the mold frame 1. The inner side of the support cover 47 is fixedly connected to the sealing ring 25. The sealing ring 25 can be easily operated through the support cover 47. Specifically, when rack 2 44 moves, it pulls spring telescopic rod 2 461 through the movement of connecting block 462. In this way, the extension and elastic potential energy of spring telescopic rod 2 461 reset rack 2 44 and suction cup 45. The support cover 47 can support the device. At the same time, the connection between support cover 47 and suction cup 45 improves the synchronization when operating multiple suction cups 45.

[0028] Working principle: By activating the electric telescopic rod 21, the ejector block 22 is pushed to form an ejector pin structure. After processing, the workpiece is taken out from the mold frame 1. At this time, in order to ensure that there is no gap between the ejector pin and the mold frame 1, which would cause burrs on the workpiece, gas is injected into the mold frame 1. After the air is filled, the electric telescopic rod 23 is activated. The extension and retraction of the electric telescopic rod 23 will pull the connecting plate 24 and the sealing ring 25 to move up and down. If the ejector pin structure is properly sealed, the electric telescopic rod 23 will not be able to drive the sealing ring 25 to move up and down. By observing whether the sealing ring 25 moves after the electric telescopic rod 23 is activated, the sealing performance of the ejector pin after reset can be quickly judged. Furthermore, by starting the blower 31, air can be injected into the device during detection. As the airflow moves, it can cause the air plate 32 to rotate. The rotation of the air plate 32 will drive the gear 33 on it to rotate, and the rotation of the gear 33 will drive the gear 34 meshing with it to rotate. The rotation of the gear 34 will drive the counting roller 35 to rotate. If the ejector pin is reset normally, the inside of the device will remain sealed, so the air injection time will be fixed. If the seal is insufficient, the air leakage will prevent the device from being filled, causing the counting roller 35 to rotate continuously. Therefore, by observing whether the number on the counting roller 35 changes, it is possible to accurately determine whether the device is sealed. Finally, before using the device, it can be fixed by the suction force of the suction cup 45. When the device is in use, it will shake due to the vibration generated during processing or stamping. At this time, as the mold frame 1 shakes, the rack 41 on it will also move. When it rotates, it will drive the gear 43 and the rotating column 42 that mesh with it to rotate. When the gear 43 rotates, it will push the rack 44 that meshes with it to move. At this time, as the rack 44 presses and pulls, it can tighten the suction cup 45. In this way, the stability is improved by the vibration of the device itself, and the stability of the ejector pin is improved when it resets.

[0029] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold ejector pin reset detection sensor, comprising a mold frame (1), characterized in that, A sealing mechanism (2) is provided in the middle of the inner side of the mold frame (1). The sealing mechanism (2) is used to accurately detect the sealing performance of the device. A detection mechanism (3) is provided in the front of the inner side of the mold frame (1). The detection mechanism (3) is used to quickly detect the reset status of the device. A positioning mechanism (4) is provided at the bottom of the mold frame (1). The positioning mechanism (4) can improve the stability of the device. The sealing mechanism (2) includes an electric telescopic rod (21), and multiple electric telescopic rods (21) are fixedly connected to the four corners inside the mold frame (1). An ejector block (22) is fixedly connected to the top of the electric telescopic rod (21). An electric telescopic rod (23) is fixedly connected to the middle of the top of the inner side of the mold frame (1). A connecting plate (24) is fixedly connected to the bottom of the electric telescopic rod (23). A sealing ring (25) is fixedly connected to the outer periphery of the connecting plate (24). The inner side of the sealing ring (25) is slidably connected to the electric telescopic rod (21). An indicator component (26) is provided on the inner side of the mold frame (1). A conveying component (27) is provided on the outer side of the mold frame (1). A protective component (28) is provided on the top of the mold frame (1).

2. The mold ejector pin reset detection sensor according to claim 1, characterized in that, The detection mechanism (3) includes a fan (31), which is connected to the middle of the front side of the mold frame (1). A wind plate (32) is rotatably connected to the front side of the interior of the mold frame (1). A gear one (33) is fixedly connected to the left side of the wind plate (32). A counting roller (35) is rotatably connected to the left side of the front end of the interior of the mold frame (1). A gear two (34) is fixedly connected to the right side of the counting roller (35). The gear two (34) meshes with the gear one (33). A sealing component (36) is provided on the left side of the front end of the mold frame (1).

3. The mold ejector pin reset detection sensor according to claim 1, characterized in that, The positioning mechanism (4) includes a rack (41), and multiple racks (41) are rotatably connected to the top of the mold frame (1). Rotating columns (42) are rotatably connected to the bottom of the inner side of the mold frame (1). Gears (43) are fixedly connected to the outer side of the rotating columns (42). Gears (43) mesh with racks (41). Multiple racks (44) are slidably connected to the bottom of the inner side of the mold frame (1). A suction cup (45) is fixedly connected to the bottom of racks (44). A reset component (46) is provided on the outer side of racks (44).

4. The mold ejector pin reset detection sensor according to claim 1, characterized in that, The indicator component (26) includes a spring telescopic tube (261), and two spring telescopic tubes (261) are fixedly connected to the left and right sides of the top of the mold frame (1) respectively. A button (262) is fixedly connected to the bottom of the spring telescopic tube (261), and an indicator light (263) is fixedly connected to the right side of the front end of the mold frame (1). The button (262) and the indicator light (263) are electrically connected.

5. The mold ejector pin reset detection sensor according to claim 1, characterized in that, The handling assembly (27) includes a handle (271), and the two handles (271) are fixedly connected to the left and right sides of the outside of the mold frame (1), respectively. A protective sleeve (272) is fixedly connected to the outside of the handle (271).

6. The mold ejector pin reset detection sensor according to claim 1, characterized in that, The protective component (28) includes a protective plate (281), which is disposed on the top of the mold frame (1). Mounting plates (282) are fixedly connected to the left and right sides of the top of the protective plate (281), and the protective plate (281) is engaged with the mold frame (1) through the mounting plates (282).

7. The mold ejector pin reset detection sensor according to claim 1, characterized in that, The sealing mechanism (2) also includes guide rods (29), and multiple guide rods (29) are slidably connected to the inside of the connecting plate (24), with the top of the guide rods (29) fixedly connected to the mold frame (1).

8. The mold ejector pin reset detection sensor according to claim 2, characterized in that, The sealing assembly (36) includes a sealing cover (361), which is connected to the left front end of the mold frame (1), and an observation window (362) is fixedly connected to the inner side of the sealing cover (361).

9. The mold ejector pin reset detection sensor according to claim 3, characterized in that, The reset assembly (46) includes a connecting block (462), and multiple connecting blocks (462) are fixedly connected to the outside of the corresponding rack two (44). A spring telescopic rod two (461) is fixedly connected to the top of the connecting block (462), and the top of the spring telescopic rod two (461) is fixedly connected to the mold frame (1).

10. The mold ejector pin reset detection sensor according to claim 3, characterized in that, The positioning mechanism (4) includes a support cover (47), which is slidably connected to the outside of the mold frame (1), and the inside of the support cover (47) is fixedly connected to the sealing ring (25).

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