Integrated injection mold cavity sensing device

Abstract

The invention relates to the field of sensing detection, in particular to an integrated injection mold cavity sensing device which comprises a probe rod, a first lead and a second lead which are connected with each other are inserted in the probe rod, a temperature sensing element is formed at the connecting point and exposed to the outer side of a probe, the probe rod is connected with a connecting pipe, and the connecting pipe is connected with an installation connector. The mounting connector is detachably connected with a connecting connector, connecting grooves are formed in the mounting connector, the connecting grooves are distributed at equal intervals in the circumferential direction of the mounting connector, avoiding grooves are formed in the mounting connector, elastic pieces are arranged in the avoiding grooves, the elastic pieces are located between the adjacent connecting grooves, the elastic pieces are in an arc shape, and the elastic pieces are arranged on the outer wall of the mounting connector in a protruding shape; the connecting joint is provided with a guide groove, and the guide groove guides the mounting joint through the elastic piece. The method has the effect of improving the temperature measurement accuracy.

Description

Technical Field

[0001] This application relates to the field of sensing detection, and particularly to an integrated injection mold cavity sensing device. Background Art

[0002] The injection molding process plays a crucial role in modern industrial production. Especially in high-precision injection molding scenarios, such as medical devices, electronic component packaging, etc., the quality and performance of the products are directly related to the development level of related industries. During the injection molding process, a fixed mold plate is provided for injection. By driving the moving mold plate to fit against the fixed mold plate, a sealed mold cavity is formed between the moving mold plate and the fixed mold plate. Melt is injected into the mold cavity, and the melt is shaped and cooled in the mold cavity to form an injection product. The real-time state of the melt pressure and temperature in the mold cavity has a decisive impact on the product quality. Therefore, the accurate monitoring of these two parameters has become a key link in optimizing process parameters and improving product quality.

[0003] In the prior art, to monitor the pressure and temperature in the injection mold cavity, a pressure sensor and a temperature sensor are respectively arranged in the mold cavity. The pressure sensor and the temperature sensor transmit signals to a monitoring station for display. For temperature monitoring, a thermocouple temperature sensor is generally used. When a thermocouple is used as the temperature sensor, it needs to be fixed to the side of the mold cavity by drilling. The thermocouple relies on the probe to contact the melt for heat transfer, and transfers the heat to the temperature sensing element. The temperature sensing element then senses the temperature according to the heat transfer. There is a certain heat transfer time and loss, resulting in a delay and error in temperature measurement, and it cannot accurately reflect the actual temperature of the melt in the mold cavity in a timely manner. Summary of the Invention

[0004] In order to improve the accuracy of temperature measurement, this application provides an integrated injection mold cavity sensing device.

[0005] An integrated injection mold cavity sensing device provided by this application adopts the following technical solutions: An integrated injection mold cavity sensing device includes a probe rod through which a first lead and a second lead are inserted. One end of the first lead is connected to one end of the second lead, and the connection point forms a temperature sensing element. The first lead and the second lead are used to export the temperature signal generated by the temperature sensing element. One end of the probe rod is connected to a probe head. An installation hole is formed through the side of the probe head away from the probe rod, and the temperature sensing element is arranged in the installation hole so that the temperature sensing element is exposed outside the probe head. One end of the probe rod away from the probe head is connected to a connecting pipe. One end of the connecting pipe away from the probe rod is connected to an installation joint, and the installation joint is detachably connected to a connecting joint. The installation joint is provided with connecting grooves which are equidistantly distributed along the circumferential direction of the installation joint. An elastic member is arranged in each connecting groove and is connected to the installation joint. The inner wall of the connecting joint is provided with a clamping groove, and the connecting joint is fixed to the installation joint by the elastic member being clamped to the groove wall of the clamping groove. An avoidance groove is provided on the outer wall of the installation joint, and an elastic piece is arranged in the avoidance groove. The elastic piece is located between adjacent connecting grooves. One end of the elastic piece is fixedly connected to the installation joint. When the elastic piece is in a free state, it is arc-shaped, and the end of the elastic piece away from the installation joint is convexly arranged on the outer wall of the installation joint. A guiding groove is provided on the side of the connecting joint away from the braided pipe, and the guiding groove guides the installation joint through the elastic piece.

[0006] By adopting the above technical solution, the temperature sensing element is located in the mounting hole on the side of the probe away from the probe rod and is exposed outside the probe. When the melt is placed into the mold cavity, the temperature sensing element can directly contact the melt in the mold cavity. When the melt contacts the temperature sensing element, a temperature signal is generated and is led out through the first lead and the second lead. Compared with the need to transfer heat through the probe to the temperature sensing element, the temperature sensing element exposed outside the probe directly contacts the melt, improving the timeliness and accuracy of temperature signal acquisition. When installing the connecting joint, align the connecting joint with the installation joint. Since the elastic members are equidistantly distributed along the circumferential direction of the installation joint and the inner wall of the connecting joint is provided with a clamping groove, only by pushing the connecting joint towards the installation joint, the elastic members will slide into and be clamped in the clamping groove, realizing the quick fixation of the connecting joint and the installation joint, reducing the cumbersome operations such as traditional screw connection, greatly improving the installation efficiency. Moreover, due to the existence of the elastic members, the connection has a certain buffering property, which can effectively reduce the influence of vibration on the connection stability, ensure the reliability of signal transmission, and reduce the maintenance difficulty and cost. The elastic piece is provided to facilitate the guiding of the installation of the connecting joint, enabling the clamping portion to accurately insert into the clamping groove, improving the clamping accuracy of the clamping member, and further improving the installation stability of the sensing device, thereby improving the temperature measurement accuracy.

[0007] Optionally, the probe includes a pressure sensing head which is integrated at one end of the probe rod close to the temperature sensing element. The probe rod is used to support the pressure sensing head and provide a channel for signal transmission.

[0008] By adopting the above technical solution, in the existing temperature sensor and pressure sensor, the pressure and temperature sensors need to be installed at different positions on the mold cavity wall respectively. In this application document, the temperature sensing element and the pressure sensing head are integrated at the probe, eliminating the need for an additional large space to separately install the pressure sensor, reducing the space occupation in the mold cavity, reducing the possibility of wiring chaos and interference of the split-type sensors, reducing the data matching error, and improving the data synchronization accuracy.

[0009] Optionally, an installation cylinder is sleeved on the probe rod. The installation cylinder is rotatably connected to the probe rod and is threadedly connected to the injection molding machine.

[0010] By adopting the above technical solution, the integrated injection mold cavity sensing device can be threadedly connected to the injection molding machine through the installation cylinder, which is convenient for the installation of the device.

[0011] Optionally, a screwing ring is connected to the outer wall of the installation cylinder, and edges are provided on the outer wall of the screwing ring.

[0012] By adopting the above technical solution, the edges on the outer wall of the screwing ring facilitate the operator to manually rotate the screwing ring, thereby driving the installation cylinder to rotate, so that the installation cylinder can be more easily threadedly connected to or disassembled from the injection molding machine, which is convenient for the installation and disassembly of the integrated injection mold cavity sensing device.

[0013] Optionally, a signal acquisition module is provided in the connection joint. The connection joint is connected to a braided tube, and a signal transmission line is inserted into the braided tube. The signal transmission line is electrically connected to the signal acquisition module.

[0014] By adopting the above technical solution, the signal acquisition module in the connection joint can acquire the temperature signal generated by the temperature sensing element and the pressure signal generated by the pressure sensing head, and then transmit the signal to the monitoring station through the signal transmission line to ensure stable signal transmission.

[0015] Optionally, the elastic member includes a connecting piece, a clamping piece and a limiting piece. The connecting piece is connected to the installation joint. One end of the connecting piece far away from the installation joint is connected to the clamping piece. The connecting part of the connecting piece and the clamping piece forms a clamping part. One end of the clamping piece far away from the connecting piece is connected to the limiting piece. One side of the limiting piece abuts against the installation joint. The clamping part is clamped in the installation joint by inserting into the clamping groove.

[0016] Optionally, a limiting ring is connected to the outer wall of the installation joint.

[0017] By adopting the above technical solution, it plays a role in restricting the position of the connection joint, reducing the possibility of the connection joint sliding or disengaging randomly, and making the connection between the installation joint and the connection joint more stable and reliable.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. The temperature sensing element is located in the installation hole on the side of the probe away from the probe rod end and is exposed outside the probe. When the melt is placed in the mold cavity, the temperature sensing element can directly contact the melt in the mold cavity. When the melt contacts the temperature sensing element, a temperature signal is generated and is led out through the first lead wire and the second lead wire. Compared with the need to transfer heat to the temperature sensing element through the probe, the temperature sensing element exposed outside the probe directly contacts the melt, improving the timeliness and accuracy of temperature signal acquisition; 2. Existing temperature sensors and pressure sensors need to install pressure and temperature sensors at different positions on the cavity wall respectively. In this application document, the temperature sensing element and the pressure sensing head are integrated at the probe, eliminating the need for additional large space to separately install the pressure sensor, reducing the space occupation in the cavity, lowering the possibility of wiring chaos and interference in the split-type sensor, reducing data matching errors, and improving data synchronization accuracy; 3. It can resist the erosion of chemical substances in the melt, ensure the stability and reliability of the sensing device performance, reduce the possibility of damage to the pressure sensing head and temperature sensing element caused by the high-temperature melt during the injection molding process, extend its service life. At the same time, the transparent material facilitates observing the states of the pressure sensing head and temperature sensing element, which is conducive to timely discovering potential problems and facilitating subsequent maintenance and repair. Description of the Drawings

[0019] Figure 1 is the overall installation schematic diagram in the embodiment of the present application.

[0020] Figure 2 is the overall structural schematic diagram in the embodiment of the present application.

[0021] Figure 3 is Figure 2 the enlarged view at A in

[0022] Figure 4 is the installation structure schematic diagram of the installation joint and the connection joint in the embodiment of the present application.

[0023] Figure 5 is the position schematic diagram of the elastic sheet in the embodiment of the present application.

[0024] Description of the Reference Numerals: 1. Probe rod; 11. Moving template; 12. Fixed template; 13. Cavity; 14. Temperature sensing element; 2. Installation cylinder; 21. External thread; 22. Turning ring; 3. Pressure sensing head; 4. Connecting pipe; 5. Installation joint; 51. Connecting groove; 52. Elastic member; 521. Connecting piece; 522. Clamping piece; 523. Limiting piece; 53. Limiting ring; 531. Anti-slip pattern; 54. Avoidance groove; 6. Connecting joint; 61. Signal acquisition module; 62. Braided pipe; 63. Clamping groove; 64. Guide groove; 7. Elastic sheet. Detailed Embodiment

[0025] The following Figures 1-5 further elaborates on the present application in detail.

[0026] The embodiment of the present application discloses an integrated injection molding cavity sensing device. Embodiment

[0027] Refer to Figure 1 andFigure 2 , an integrated injection mold cavity sensing device provided by an embodiment of the present application includes a probe rod 1. A first lead and a second lead are inserted through the probe rod 1. One end of the first lead is connected to one end of the second lead, and the connection point forms a temperature sensing element 14. The first lead is electrically connected to a detection table, and the second lead is electrically connected to the detection table. The first lead and the second lead are used to export the temperature signal generated by the temperature sensing element 14. One end of the probe rod 1 is connected with a probe head. An installation hole is formed through the side of the probe head far away from the probe rod 1. The temperature sensing element 14 is arranged in the installation hole of the probe head, so that the temperature sensing element 14 is exposed to the outside of the probe head far away from the probe rod 1. An installation cylinder 2 is sleeved on the outer wall of the probe rod 1. The installation cylinder 2 is rotatably connected with the probe rod 1. The end of the installation cylinder 2 close to the probe head is provided with an external thread 21. The installation cylinder 2 is threadedly connected to an injection molding machine through the external thread 21. When the installation cylinder 2 is fixed to the injection molding machine, the installation cylinder 2 is vertically arranged, and at this time the temperature sensing element 14 is located at the top of the installation cylinder 2. In this example, the installation cylinder 2 is threadedly connected to the moving template 11. When the moving template 11 is attached to the fixed template 12, the probe head is located in the mold cavity 13. In this embodiment, the first lead and the second lead are respectively nickel-chromium alloy and nickel-silicon alloy wires. Different combinations of alloy wires can form different types of thermocouples to adapt to different temperature measurement ranges and accuracy requirements.

[0028] Specifically, referring to Figure 2 and Figure 3 , the probe rod 1 is a cylindrical metal rod, and metal materials such as stainless steel can be used, which has good strength and corrosion resistance. The installation cylinder 2 is sleeved outside the probe head and is rotatably connected to the probe rod 1 through a bearing, so that the installation cylinder 2 will not drive the probe rod 1 to rotate when rotating. The installation cylinder 2 is threadedly connected to the injection molding machine, which is convenient for the installation and disassembly of the device. The outer wall of the installation cylinder 2 is fixedly connected with a screwing ring 22. The screwing ring 22 is located at the end of the installation cylinder 2 far away from the probe head. The outer wall of the screwing ring 22 is provided with edges and corners. In this example, the outer wall of the screwing ring 22 is provided with six edges and corners, which is convenient for the operator to screw the installation cylinder 2 with tools or hands to realize the installation of the device on the injection molding machine. Further, the screwing ring 22 can be connected to the installation cylinder 2 by welding or integral molding.

[0029] The probe head includes a pressure sensing head 3. The pressure sensing head 3 adopts a 316L stainless steel shell and is internally provided with a piezoresistive sensing chip. The pressure sensing head 3 is integrated at one end of the probe rod 1 close to the temperature sensing element 14. The probe rod 1 is used to support the pressure sensing head 3 and provide a channel for signal transmission. A third lead is inserted through the probe rod 1, and the third lead is electrically connected to the pressure sensing head 3.

[0030] One end of the probe rod 1 away from the probe head is fixedly connected with a connecting pipe 4. The installation joint 5 is connected to one end of the connecting pipe 4 away from the probe rod 1. One end of the connecting pipe 4 away from the probe rod 1 is connected with the installation joint 5. The installation joint 5 is detachably connected with a connecting joint 6. A signal acquisition module 61 is arranged in the connecting joint 6. The signal acquisition module 61 is electrically connected to the first lead wire, the second lead wire and the third lead wire. The signal acquisition module 61 is used for acquiring the signals transmitted by the temperature sensing element 14 and the pressure sensing head 3. The connecting joint 6 is fixedly connected with a braided pipe 62. A signal transmission line is inserted into the braided pipe 62. The braided pipe 62 can protect the signal transmission line from external interference and damage. The signal transmission line is electrically connected to the signal acquisition module 61. The signal acquisition module 61 is electrically connected to the monitoring station.

[0031] When the melt contacts the temperature sensing element 14, the temperature sensing element 14 transmits the temperature signal to the signal acquisition module 61 through the first lead wire and the second lead wire. At the same time, the melt extrudes the pressure sensing head 3, and the pressure sensing head 3 transmits the pressure signal to the signal acquisition module 61 through the third lead wire. The signal acquisition module 61 collects and centralizes the temperature and pressure signals. Subsequently, the signals collected by the signal acquisition module 61 are transmitted to the monitoring station through the signal transmission line.

[0032] Refer to Figure 4 , the installation joint 5 is provided with a connecting groove 51. The connecting grooves 51 are equidistantly distributed along the circumferential direction of the installation joint 5. An elastic member 52 is arranged in the connecting groove 51. The elastic member 52 is connected to the installation joint 5. A clamping groove 63 is formed on the inner wall of the connecting joint 6. The connecting joint 6 is fixed to the installation joint 5 by the elastic member 52 being clamped to the groove wall of the clamping groove 63. Specifically, the elastic member 52 includes a connecting piece 521, a clamping piece 522 and a limiting piece 523. The connecting piece 521, the clamping piece 522 and the limiting piece 523 are integrally formed. The connecting part of the connecting piece 521 and the clamping piece 522 forms a clamping part, which is convexly arranged on the outer wall of the connecting joint 6. The connecting piece 521 is connected to the installation joint 5. One end of the connecting piece 521 away from the installation joint 5 is connected to the clamping piece 522. One end of the clamping piece 522 away from the connecting piece 521 is connected to the limiting piece 523. One side of the limiting piece 523 abuts against the installation joint 5. The clamping part is clamped to the installation joint 5 by being inserted into the clamping groove 63.

[0033] A limiting ring 53 is fixedly connected to the outer wall of the installation joint 5. The limiting ring 53 is located at one end of the installation joint 5 close to the connecting pipe 4. An annular anti-slip pattern 531 is arranged on the outer wall of the limiting ring 53. When the clamping part is inserted into the clamping groove 63 and clamped to the elastic member 52, one end side of the limiting ring 53 away from the connecting pipe 4 is attached to one end side of the connecting joint 6 away from the braided pipe 62.

[0034] The two groove walls of the clamping groove 63 adjacent to the clamping part are inclined, so that the area of the notch of the clamping groove 63 is larger than the area of the groove wall of the clamping groove 63 far from the notch. When unlocking the connection joint 6 and the installation joint 5, by rotating the connection joint 6, the clamping part is removed from the clamping groove 63 through one inclined groove wall of the clamping groove 63, so that the locking structure of the connection joint 6 and the installation joint 5 is unlocked. Then, the connection joint 6 is slid in the direction away from the limiting ring 53 until the installation joint 5 is separated from the connection joint 6, realizing the disassembly of the connection joint 6 and the installation joint 5, and improving the convenience.

[0035] Further, when it is necessary to connect the installation joint 5 and the connection joint 6, the connection joint 6 is pushed. The connection joint 6 slides along the outer wall of the installation joint 5. At the same time, the connection joint 6 pushes the connecting piece 521 towards the axis of the installation joint 5, so that the connecting piece 521 and the clamping piece 522 cannot protrude from the outer wall of the installation joint 5, facilitating the sliding of the connection joint 6 on the outer wall of the installation joint 5 until the end side of the connection joint 6 far from the braided tube 62 abuts against the end side of the limiting ring 53 far from the connecting tube 4. At this time, the clamping part is clamped on the groove wall of the clamping groove 63 close to one end of the limiting ring 53, realizing the clamping operation of the installation joint 5 and the connection joint 6.

[0036] An avoidance groove 54 is formed in the outer wall of the installation joint 5. An elastic piece 7 is arranged in the avoidance groove 54. The elastic piece 7 is located between adjacent connection grooves 51. One end of the elastic piece 7 is fixedly connected to the installation joint 5. When the elastic piece 7 is in a free state, the elastic piece 7 is arc-shaped. In this example, the elastic piece 7 is one-fourth of a circular arc shape. The end of the elastic piece 7 far from the installation joint 5 is convexly arranged on the outer wall of the installation joint 5. A guiding groove 64 is formed in the end side of the connection joint 6 far from the braided tube 62. The guiding groove 64 guides the installation joint 5 through the elastic piece 7. When the elastic piece 7 is inserted into the guiding groove 64, the side of the elastic piece 7 far from the avoidance groove 54 abuts against the groove wall of the guiding groove 64. The groove wall of the guiding groove 64 far from the notch is in the shape of an inclined chamfer surface. When the end of the elastic piece 7 far from the installation joint 5 fits against the avoidance groove 54, the clamping part is clamped into the clamping groove 63. In this example, the elastic piece 7 is made of elastic stainless steel.

[0037] When it is necessary to connect the installation joint 5 with the connection joint 6, align the guiding groove 64 with the elastic piece 7, and push the connection joint 6 so that the elastic piece 7 abuts against the inclined chamfer surface of the guiding groove 64. When the connection joint 6 does not push the elastic piece 7, the elastic piece 7 is in an arc shape. Continuously push the connection joint 6 so that the connection joint 6 pushes the elastic piece 7. When the connection joint 6 pushes the elastic piece 7, the elastic piece 7 takes the end close to the installation joint 5 as the starting point and successively fits the groove wall of the avoidance groove 54 away from the notch until the elastic piece 7 gradually completely fits the groove wall of the avoidance groove 54 away from the notch. At this time, the elastic piece 7 is in a straight shape. One side of the elastic piece 7 abuts against the groove wall of the avoidance groove 54 away from the notch, and the side of the elastic piece 7 away from the groove wall of the avoidance groove 54 abuts against the inner wall of the installation joint 5. At the same time, the connection joint 6 squeezes the connecting piece 521, causing the connecting piece 521 to move towards the axis of the installation joint 5. The elastic piece 7 completes the guiding effect of connecting the connection joint 6 and the installation joint 5. Continuously push the connection joint 6 until the engaging piece is inserted into the engaging groove 63, thereby completing the connection between the connection joint 6 and the installation joint 5 and improving the accuracy of the engagement of the engaging piece.

[0038] The implementation principle of an integrated injection mold cavity sensing device in this embodiment is as follows: Through an integrated design, the integrated injection mold cavity sensing device integrates the pressure sensing head 3 and the temperature sensing element 14 at one end of the probe rod 1, reducing the space occupied by the mold cavity 13 and reducing the possibility of chaotic wiring of discrete sensors. When the melt is placed in the mold cavity 13, the temperature sensing element 14 can directly contact the melt in the mold cavity 13. When the melt contacts the temperature sensing element 14, a temperature signal is generated and the signal is exported to the signal acquisition module 61 through the first lead and the second lead. At the same time, the melt squeezes the pressure sensing head 3, and the pressure sensing head 3 exports the signal to the signal acquisition module 61 through the third lead. Subsequently, the signal acquisition module 61 then conveys the signal to the monitoring station through the signal transmission line. Compared with the need to transfer heat to the temperature sensing element 14 through the probe, the temperature sensing element 14 exposed outside the probe directly contacts the melt, thereby improving the timeliness and accuracy of temperature signal acquisition.

[0039] The above are all preferred embodiments of this application. This embodiment only makes an explanation of this application and does not limit the protection scope of this application in sequence. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An integrated injection mold cavity sensing device, characterized in that, It includes a probe rod (1) through which a first lead wire and a second lead wire are inserted. One end of the first lead wire is connected to one end of the second lead wire, and the connection point forms a temperature sensing element (14). The first lead wire and the second lead wire are used to export the temperature signal generated by the temperature sensing element (14). One end of the probe rod (1) is connected with a probe head. An installation hole is formed through the side of the probe head far away from the probe rod (1). The temperature sensing element (14) is arranged in the installation hole so that the temperature sensing element (14) is exposed outside the probe head. One end of the probe rod (1) far away from the probe head is connected with a connecting pipe (4). One end of the connecting pipe (4) far away from the probe rod (1) is connected with a mounting joint (5). The mounting joint (5) is detachably connected with a connecting joint (6). The mounting joint (5) is provided with connecting grooves (51) which are equidistantly distributed along the circumferential direction of the mounting joint (5). Elastic members (52) are arranged in the connecting grooves (51). The elastic members (52) are connected with the mounting joint (5). A clamping groove (63) is formed in the inner wall of the connecting joint (6). The connecting joint (6) is fixed to the mounting joint (5) by the elastic members (52) being clamped to the groove wall of the clamping groove (63). An avoidance groove (54) is formed in the outer wall of the mounting joint (5). An elastic sheet (7) is arranged in the avoidance groove (54). The elastic sheet (7) is located between adjacent connecting grooves (51). One end of the elastic sheet (7) is fixedly connected with the mounting joint (5). When the elastic sheet (7) is in a free state, the elastic sheet (7) is arc-shaped. The end of the elastic sheet (7) far away from the mounting joint (5) is convexly arranged on the outer wall of the mounting joint (5). A guiding groove (64) is formed in the side of the connecting joint (6) far away from the braided pipe (62). The guiding groove (64) guides the mounting joint (5) through the elastic sheet (7).

2. The integrated injection mold cavity sensing device according to claim 1, wherein, The probe head includes a pressure sensing head (3). The pressure sensing head (3) is integrated at one end of the probe rod (1) close to the temperature sensing element (14). The probe rod (1) is used to support the pressure sensing head (3) and provide a channel for signal transmission.

3. The integrated injection mold cavity sensing device according to claim 1, characterized in that, The probe rod (1) is sleeved with an installation cylinder (2). The installation cylinder (2) is rotationally connected with the probe rod (1). The installation cylinder (x) is threadedly connected to an injection molding machine.

4. An integrated injection mold cavity sensing device according to claim 3, characterized in that, The outer wall of the installation cylinder (2) is connected with a screwing ring (22). The outer wall of the screwing ring (22) is provided with edges and corners.

5. An integrated injection mold cavity sensing device according to claim 1, wherein, A signal acquisition module (61) is arranged in the connecting joint (6). The connecting joint (6) is connected with a braided pipe (62). A signal transmission line is inserted into the braided pipe (62). The signal transmission line is electrically connected to the signal acquisition module (61).

6. The integrated injection mold cavity sensing device according to claim 1, wherein, The elastic member (52) includes a connecting piece (521), a clamping piece (522) and a limiting piece (523). The connecting piece (521) is connected to the mounting joint (5). One end of the connecting piece (521) away from the mounting joint (5) is connected to the clamping piece (522). The connecting portion of the connecting piece (521) and the clamping piece (522) forms a clamping portion. One end of the clamping piece (522) away from the connecting piece (521) is connected to the limiting piece (523). One side of the limiting piece (523) abuts against the mounting joint (5). The clamping portion is clamped to the mounting joint (5) by inserting into the clamping groove (63).

7. An integrated injection mold cavity sensing device according to claim 1, wherein A limiting ring (53) is connected to the outer wall of the mounting joint (5).

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