Electromechanical linkage safety switch of injection molding machine

Abstract

The utility model discloses an electromechanical linkage safety switch of an injection molding machine, which is applied to the injection molding machine provided with a fixed mold plate, a movable mold plate and a movable door, and comprises an electric appliance inductive switch and a mechanical lock switch, and the mechanical lock switch comprises a flashboard, a lock rod, a mechanical lock collision block and a flashboard fixing shaft; the mechanical lock collision block is installed on a movable door of the injection molding machine, the electric appliance inductive switch is installed on the fixed mold plate, and the detection end of the electric appliance inductive switch is located above the gate plate. Whether the flashboard works normally or not is judged according to whether the electric appliance induction switch is triggered or not, electric protection is added to the mechanical lock switch, linkage of the mechanical safety switch and the electric safety switch is achieved, and the reliability of the safety protection switch of the injection molding machine is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to an electromechanical linkage safety switch for an injection molding machine. Background Technology

[0002] The molds for plastic products are fixed to the moving and fixed mold plates of the injection molding machine. During production, the opening and closing movement of the moving mold plate enables the injection molding of the plastic product and its demolding. The locking force generated when the moving and fixed mold plates close is measured in tons, meaning the clamping force is enormous. Furthermore, the moving mold plate moves at high speeds. Improper operation can lead to mold damage or even serious safety accidents such as operator injury. Therefore, the machine's safety switches are crucial, and their reliability must be continuously improved to reduce the probability of failure.

[0003] Currently, the safety switches on injection molding machines can be divided into three types: mechanical lock safety switches, electrical safety switches, and hydraulic safety switches. Although all three safety switches must simultaneously confirm a safe operation before the machine can function properly, they are triggered independently and do not affect each other. This creates the possibility of misoperation. In certain special circumstances, even if the machine is not ready, all three switches might mistakenly identify it as being in a safe state and start the machine, potentially causing an accident and posing a significant safety hazard. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model proposes an electromechanical linkage safety switch for injection molding machines, aiming to solve the problem that independent triggering of safety switches can lead to misoperation and safety accidents.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An electromechanical linkage safety switch for an injection molding machine, applied to an injection molding machine equipped with a fixed template, a moving template and a movable door, includes an electrical induction switch and a mechanical lock switch, wherein the mechanical lock switch includes a gate, a locking rod, a mechanical lock stop block and a gate fixing shaft;

[0007] One end of the locking rod passes through the guide hole of the fixed platen of the injection molding machine, and the other end of the locking rod is connected to the moving platen of the injection molding machine.

[0008] The gate is rotatably mounted on the fixed template via the gate fixing shaft;

[0009] The mechanical lock stop is installed on the movable door of the injection molding machine, the electrical sensor switch is installed on the fixed template, and the detection end of the electrical sensor switch is located above the gate.

[0010] When the movable door is opened, the mechanical lock block and the gate separate, the gate blocks the guide hole or the gate is locked to the lock rod, and the gate separates from the detection end of the electrical induction switch;

[0011] When the movable door is closed, the mechanical lock block causes the gate to swing upward until the gate moves away from the guide hole, at which point the gate and the detection end of the electrical induction switch come into contact.

[0012] Furthermore, the electrical induction switch includes a swing arm sensor and a switch mounting base. The swing arm sensor is mounted on the fixed template via the mounting base, and the detection end of the electrical induction switch is the swing arm of the swing arm sensor.

[0013] When the movable door is closed, the mechanical lock block causes the gate to swing upward, which in turn causes the swing arm of the swing-arm sensor to swing upward.

[0014] Specifically, the bottom of the switch fixing base is provided with a first mounting hole, and the switch fixing base is fixedly connected to the fixed template through the first mounting hole. The length direction of the first mounting hole is parallel to the length direction of the locking rod.

[0015] The switch mounting base has a vertical second mounting hole on one side. The swing arm sensor is fixedly connected to the switch mounting base through the second mounting hole. Both the first mounting hole and the second mounting hole are elongated holes.

[0016] Furthermore, the switch mounting base includes, from bottom to top, a first horizontal part, a first vertical part, and a second horizontal part, and the first horizontal part and the second horizontal part are connected by the first vertical part to form a Z-shaped body;

[0017] The first mounting hole is located in the first horizontal part, and the second mounting hole is located in the first vertical part. The second horizontal part is used to cover the top of the electrical induction switch.

[0018] Preferably, the mechanical lock switch further includes a first limiting member, which is installed on the fixed template, and the first limiting member and the gate fixing shaft are located on opposite sides of the guide hole.

[0019] Furthermore, the mechanical lock switch also includes a second limiting member, which is installed on the fixed template and is located below and close to the gate fixing shaft.

[0020] More specifically, the gate includes a gate shaft, a first snap-fit ​​portion, a first mounting portion, and a first transition portion. The first mounting portion and the gate fixing shaft are rotatably connected. The first transition portion is located at one end of the first mounting portion near the guide hole. The gate shaft is located at the other end of the first mounting portion away from the guide hole. The first snap-fit ​​portion is located at one end of the first transition portion near the guide hole.

[0021] The first mounting part is located above the second limiting member, and one end of the first transition part is inclined upward. When the movable door is opened, the first snap-fit ​​part blocks the guide hole or is snapped into the locking rod.

[0022] Furthermore, the mechanical lock block includes a pressing part, a guiding part, and a second mounting part. The second mounting part is mounted on the movable door. The pressing part is horizontally disposed at one end of the second mounting part near the gate plate, and the guiding part is horizontally disposed at one end of the pressing part near the gate plate.

[0023] The length direction of the guide portion is parallel to the length direction of the movable door. The guide portion gradually tilts upward towards the closing direction of the movable door. The guide portion is used to guide the gate shaft of the gate plate to move downward along the lower surface of the guide portion to the pressing portion when the movable door is closed. The pressing portion is used to press the gate shaft of the gate plate when the movable door is closed.

[0024] Furthermore, the locking rod is provided with a plurality of second locking portions along the axis. Each second locking portion includes a first column, a second column, and a second transition portion. The first column is connected to the second column through the second transition portion. The diameter of the first column is larger than that of the second column. A limiting ring is formed between the first column and the second column of the adjacent second locking portion. The limiting ring faces the gate.

[0025] When the movable door is opened, the gate is engaged with the second column of one of the second engagement parts.

[0026] Furthermore, the swing arm sensor is also equipped with a roller, which is located at the free end of the swing arm; when the movable door is closed, the gate and the roller abut against each other.

[0027] The technical solution of this utility model can include the following beneficial effects:

[0028] The electromechanical safety switch of the injection molding machine links and triggers the electrical induction switch and the mechanical lock switch to assist the injection molding machine in determining whether the gate is working properly. When the movable door closes, the mechanical lock stopper causes the gate to swing upward. When the gate swings upward completely beyond the guide hole, it contacts the detection end of the electrical induction switch, thereby triggering the electrical induction switch. In this way, the injection molding machine can determine whether the gate is working properly by whether the electrical induction switch is triggered, adding an electrical protection to the mechanical lock switch and realizing the linkage between the mechanical safety switch and the electrical safety switch, greatly improving the reliability of the injection molding machine's safety protection switch. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the electromechanical linkage safety switch of an injection molding machine according to one embodiment of this utility model;

[0030] Figure 2 yes Figure 1 Enlarged view of the closed state of the movable door at point A;

[0031] Figure 3 yes Figure 1 Enlarged view of the open state of the movable door at point A;

[0032] Figure 4 This is a structural diagram of an electrical induction switch according to one embodiment of the present invention;

[0033] Figure 5 This is a structural diagram of a gate plate according to one embodiment of the present utility model;

[0034] Figure 6 This is a structural diagram of the mechanical lock block according to one embodiment of the present invention;

[0035] Figure 7 This is a structural diagram of the locking rod according to one embodiment of the present invention.

[0036] Among them, there is an electrical induction switch 1; a mechanical lock switch 2; a fixed template 3; a moving template 4; a movable door 5; a gate 21; a locking rod 22; a mechanical lock stop 23; a gate fixing shaft 24; a guide hole 31; a swing arm sensor 11; a switch fixing seat 12; a swing arm 111; a first mounting hole 121; a second mounting hole 122; a first horizontal part 123; a first vertical part 124; a second horizontal part 125; a first limiting member 25; a second limiting member 26; a gate shaft 211; a first snap-fit ​​part 212; a first mounting part 213; a first transition part 214; a pressing part 231; a guide part 232; a second mounting part 233; a second snap-fit ​​part 220; a first column 221; a second column 222; a second transition part 223; a limiting ring 224; and a roller 112. Detailed Implementation

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] In the description of this utility model, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The following is combined with Figures 1 to 7 This invention describes an electromechanical linkage safety switch for an injection molding machine, which is applied to an injection molding machine equipped with a fixed template 3, a movable template 4 and a movable door 5. The switch is characterized by including an electrical induction switch 1 and a mechanical lock switch 2. The mechanical lock switch 2 includes a gate 21, a locking rod 22, a mechanical lock block 23 and a gate fixing shaft 24.

[0042] One end of the locking rod 22 passes through the guide hole 31 of the fixed template 3 of the injection molding machine, and the other end of the locking rod 22 is connected to the moving template 4 of the injection molding machine.

[0043] The gate plate 21 is rotatably mounted on the fixed template 3 via the gate plate fixing shaft 24;

[0044] The mechanical lock block 23 is installed on the movable door 5 of the injection molding machine, the electrical sensor switch 1 is installed on the fixed template 3, and the detection end of the electrical sensor switch 1 is located above the gate 21;

[0045] When the movable door 5 is opened, such as Figure 3As shown, the mechanical lock block 23 and the gate 21 are separated, the gate 21 blocks the guide hole 31 or the gate 21 is stuck on the lock rod 22, and the gate 21 is separated from the detection end of the electrical induction switch 1;

[0046] When the movable door 5 is closed, such as Figure 2 As shown, the mechanical lock block 23 drives the gate 21 to swing upward until the gate 21 moves away from the guide hole 31, at which point the gate 21 contacts the detection end of the electrical induction switch 1.

[0047] The electromechanical linkage safety switch of the injection molding machine links and triggers the electrical induction switch 1 and the mechanical lock switch 2, greatly improving the reliability of the injection molding machine's safety protection switch. One end of the locking rod 22 of the mechanical lock switch 2 is fixed to the moving platen 4 of the injection molding machine, and the length of the locking rod 22 extending out of the moving platen 4 is adjusted according to the thickness of the mold. The gate plate 21 is rotatably mounted on the fixed platen 3 via the gate plate fixing shaft 24, and can swing at a certain angle in front of the guide hole 31. If the injection molding machine is not in operation, the gate plate 21 will swing downward under the action of gravity, thereby blocking the guide hole 31 or the gate plate 21 will be stuck in the locking rod 22; if the machine suddenly starts working at this time, the locking rod 22 will hit the gate plate 21 blocking in front of the guide hole 31 or the gate plate 21 will jam the locking rod 22, causing the moving platen 4 to stop, ensuring the safety of the mold, equipment, and operators.

[0048] When the injection molding machine is ready and the movable door 5 is closed, the mechanical lock block 23 fixed to the movable door 5 will cause the gate 21 to swing upward until it is above the guide hole 31. This allows the moving mold plate 4 to pass normally through the guide hole 31 without hitting the gate 21 when the mold is closed, thus providing mechanical protection. However, existing injection molding machines cannot detect if the gate 21 is damaged or removed. When the injection molding machine is not in operation, it cannot determine whether the gate 21 is ready and will start running directly, thus losing the mechanical lock protection function and potentially causing injury or mold damage. Therefore, in this embodiment, the electromechanical linkage safety switch links the electrical induction switch 1 and the mechanical lock switch 2 to assist the injection molding machine in determining whether the gate 21 is working properly. When the movable door 5 is closed, the mechanical lock block 23 causes the gate 21 to swing upward. When the gate 21 swings upward completely beyond the guide hole 31, it will contact the detection end of the electrical induction switch 1, thereby triggering the electrical induction switch 1. In this way, the injection molding machine can determine whether the gate 21 is working properly by whether the electrical induction switch 1 is triggered, adding an electrical protection to the mechanical lock switch 2 and realizing the linkage between the mechanical safety switch and the electrical safety switch.

[0049] Specifically, such as Figure 4As shown, the electrical induction switch 1 includes a swing arm sensor 11 and a switch mounting base 12. The swing arm sensor 11 is mounted on the fixed template 3 through the mounting base 12. The detection end of the electrical induction switch 1 is the swing arm 111 of the swing arm sensor 11.

[0050] When the movable door 5 is closed, the mechanical lock block 23 drives the gate 21 to swing upward, and then the gate 21 drives the swing arm 111 of the swing arm sensor 11 to swing upward.

[0051] Since the gate 21 can rotate freely along the gate's fixed axis 24, the gap between the plane of the gate 21 and the code surface of the fixed template 3 will fluctuate between 2-5mm. Using a common proximity switch would easily cause false alarms. Therefore, this embodiment uses a swing-arm sensor 11 with a wider contact range. When the movable door 5 is closed, the mechanical lock block 23 drives the gate 21 to swing upwards. As the gate 21 swings upwards, the swing arm 111 of the swing-arm sensor 11 also swings upwards. When the gate 21 swings upwards completely beyond the guide hole 31, it triggers the electrical induction switch 1. The swing-arm sensor 11 in this embodiment is a conventional sensor, and its specific structure and working principle are not described in detail.

[0052] Furthermore, the bottom of the switch fixing base 12 is provided with a first mounting hole 121, and the switch fixing base 12 is fixedly connected to the fixed template 3 through the first mounting hole 121. The length direction of the first mounting hole 121 is parallel to the length direction of the locking rod 22.

[0053] The switch mounting base 12 has a vertical second mounting hole 122 on one side. The swing arm sensor 11 is fixedly connected to the switch mounting base 12 through the second mounting hole 122. Both the first mounting hole 121 and the second mounting hole 122 are elongated holes.

[0054] The first mounting hole 121 is an elongated hole, which allows adjustment of the installation position of the switch mounting base 12 on the fixed template 3 to ensure that the swing arm 111 of the swing arm sensor 11 can contact the gate plate 21. The vertical second mounting hole 122 is also an elongated hole, which allows adjustment of the installation height of the swing arm sensor 11 to accommodate different models of mechanical lock switches 2, ensuring that the swing arm sensor 11 is only triggered when the gate plate 21 is away from the guide hole 31.

[0055] Furthermore, the switch mounting base 12 includes, from bottom to top, a first horizontal part 123, a first vertical part 124, and a second horizontal part 125, wherein the first horizontal part 123 and the second horizontal part 125 are connected by the first vertical part 124 to form a Z-shaped body;

[0056] The first mounting hole 121 is provided in the first horizontal part 123, the second mounting hole 122 is provided in the first vertical part 124, and the second horizontal part 125 is used to cover the top of the electrical induction switch 1.

[0057] The first horizontal part 123 is used to fix the switch mounting base 12 to the fixed template 3. The first vertical part 124 is used to install the swing arm sensor 11. The swing arm sensor 11 is installed on the side of the first vertical part 124 facing the gate plate 21. The second horizontal part 125 is used to cover the top of the electrical induction switch 1 to prevent falling debris from damaging the electrical induction switch 1.

[0058] In some embodiments, the mechanical lock switch 2 further includes a first limiting member 25, such as... Figure 2 and Figure 3 As shown, the first limiting member 25 is installed on the fixed template 3, and the first limiting member 25 and the gate fixing shaft 24 are located on opposite sides of the guide hole 31.

[0059] When the gate 21 swings downward under the influence of gravity, the first limiting member 25 limits the downward swing amplitude of the gate 21, so that when the locking rod 22 is not inserted into the guide hole 31, the gate 21 just blocks the guide hole 31 and will not continue to swing downward. It should be noted that when the locking rod 22 is inserted into the guide hole 31, the gate 21 swings downward under the influence of gravity and then engages with the locking rod 22. The first limiting member 25 can be made of elastic material, such as a limiting buffer pad, to reduce the impact wear on the gate 21.

[0060] Preferably, the mechanical lock switch 2 further includes a second limiting member 26, such as... Figure 2 and Figure 3 As shown, the second limiting member 26 is installed on the fixed template 3, and the second limiting member 26 is located below and close to the gate fixing shaft 24.

[0061] When the movable door 5 is closed, the mechanical lock stop 23 causes the gate 21 to swing upward. The second limiting member 26 can limit the upward swing amplitude of the gate 21, preventing the gate 21 from swinging too much and damaging the swing arm switch 10, or even turning to another direction and causing the gate 21 to fail. The second limiting member 26 can be made of metal, such as a limiting screw, which is more robust and durable.

[0062] More preferably, such as Figure 5As shown, the gate 21 includes a gate shaft 211, a first snap-fit ​​portion 212, a first mounting portion 213, and a first transition portion 214. The first mounting portion 213 and the gate fixing shaft 24 are rotatably connected. The first transition portion 214 is disposed at one end of the first mounting portion 213 near the guide hole 31. The gate shaft 211 is disposed at the other end of the first mounting portion 213 away from the guide hole 31. The first snap-fit ​​portion 212 is disposed at one end of the first transition portion 214 near the guide hole 31.

[0063] The first mounting part 213 is located above the second limiting member 26, and one end of the first transition part 214 is inclined upward. When the movable door 5 is opened, the first snap-fit ​​part 212 blocks the guide hole 31 or is snapped into the locking rod 22.

[0064] It should be noted that the length and weight of the first latching part 212 are both greater than those of the first mounting part 213. Furthermore, the first transition part 214 offsets the first latching part 212 from the first mounting part 213, causing the center of gravity of the gate 21 to shift towards the first latching part 212. This ensures that the gate 21 will swing downwards towards the guide hole 31 due to gravity, and that when the gate 21 swings upwards under external force, its center of gravity remains between the guide hole 31 and the gate fixing shaft 24, preventing the gate 21 from malfunctioning. The gate shaft 211 interacts with the mechanical lock block 23, causing the gate 21 to swing upwards. When the mechanical lock block 23 presses down on the gate shaft 211, the gate 21 swings upwards.

[0065] More specifically, such as Figure 6 As shown, the mechanical lock block 23 includes a pressing part 231, a guide part 232, and a second mounting part 233. The second mounting part 233 is mounted on the movable door 5. The pressing part 231 is horizontally arranged at one end of the second mounting part 233 near the gate plate 21, and the guide part 232 is horizontally arranged at one end of the pressing part 231 near the gate plate 21.

[0066] The length direction of the guide portion 232 is parallel to the length direction of the movable door 5. The guide portion 232 gradually tilts upward in the closing direction of the movable door 5. The guide portion 232 is used to guide the gate shaft 211 of the gate plate 21 to move downward along the lower surface of the guide portion 232 to the pressing portion 231 when the movable door 5 is closed. The pressing portion 231 is used to press the gate shaft 211 of the gate plate 21 when the movable door 5 is closed.

[0067] Therefore, when the movable door 5 moves in the closing direction, the guide part 232 first abuts against the gate shaft 211 of the gate plate 21, guiding the gate shaft 211 of the gate plate 21 to move downward along the lower surface of the guide part 232, thereby causing the first locking part 212 of the gate plate 21 to swing upward and gradually move away from the guide hole 31; until the movable door 5 is closed, the gate shaft 211 moves to the pressing part 231, the pressing part 231 presses the gate shaft 211 of the gate plate 21, and in conjunction with the second limiting member 26, the gate plate 21 swings upward until it completely exceeds the guide hole 31, triggering the electrical induction switch 1.

[0068] In some embodiments, the locking rod 22 is provided with a plurality of second engaging portions 220 along its axis, such as... Figure 7 As shown, the second latching portion 220 includes a first column 221, a second column 222, and a second transition portion 223. The first column 221 is connected to the second column 222 through the second transition portion 223. The diameter of the first column 221 is larger than that of the second column 222. A limiting ring 224 is formed between the first column 221 and the second column 222 of the adjacent second latching portion 220. The limiting ring 224 faces the gate plate 21.

[0069] When the movable door 5 is opened, the gate 21 is engaged with the second column 222 of one of the second engaging parts 220.

[0070] The locking rod 22 has multiple second engaging portions 220 along its axis, forming multiple sets of steps. Between the minimum and maximum capacity, one of the second engaging portions 220 of the locking rod 22 remains on the guide hole 31 of the fixed template 3. The second engaging portion 220 of the locking rod 22 includes a first column 221, a second column 222, and a second transition portion 223. The second transition portion 223 forms a stepless transition from the small-diameter second column 222 to the large-diameter first column 221, while the transition from the large-diameter first column 221 to the small-diameter second column 222 is formed by a limiting ring 224, creating a stepped shape.

[0071] The purpose of this is that when the moving mold plate 4 is open, the locking rod 22 can smoothly pass through the gate plate 21 using the second transition part 223 of the second locking part 220. When the moving mold plate 4 is closed, since the first column 221 and the second column 222 in the direction of the second locking part 220 of the locking rod 22 do not have the second transition part 223 with an inclined edge, but are instead a limiting ring 224, if the gate plate 21 is not open, the locking rod 22 will hit the gate plate 21, and the moving mold plate 4 will stop.

[0072] Furthermore, the swing arm sensor 11 is also provided with a roller 112, which is located at the free end of the swing arm 111; when the movable door 5 is closed, the gate 21 and the roller 112 abut against each other.

[0073] The swing arm sensor 11 is equipped with a roller 112, so that when the gate 21 swings upward, it will abut against the roller 112 and drive the roller 112 to roll. The roller 112 rolls and moves upward with the swing arm 111. Compared with the swing arm 111 sliding on the gate 21, the rolling of the roller 112 is less likely to cause jamming and wear on the gate 21.

[0074] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. An electromechanical safety switch for an injection molding machine, applied to an injection molding machine equipped with a fixed mold plate, a moving mold plate, and a movable door, characterized in that, This includes electrical induction switches and mechanical lock switches, wherein the mechanical lock switch includes a gate, a locking rod, a mechanical lock stop block, and a gate fixing shaft; One end of the locking rod passes through the guide hole of the fixed platen of the injection molding machine, and the other end of the locking rod is connected to the moving platen of the injection molding machine. The gate is rotatably mounted on the fixed template via the gate fixing shaft; The mechanical lock stop is installed on the movable door of the injection molding machine, the electrical sensor switch is installed on the fixed template, and the detection end of the electrical sensor switch is located above the gate. When the movable door is opened, the mechanical lock block and the gate separate, the gate blocks the guide hole or the gate is locked to the lock rod, and the gate separates from the detection end of the electrical induction switch; When the movable door is closed, the mechanical lock block causes the gate to swing upward until the gate moves away from the guide hole, at which point the gate and the detection end of the electrical induction switch come into contact.

2. The electromechanical linkage safety switch for an injection molding machine according to claim 1, characterized in that, The electrical induction switch includes a swing arm sensor and a switch mounting base. The swing arm sensor is mounted on the fixed template through the mounting base, and the detection end of the electrical induction switch is the swing arm of the swing arm sensor. When the movable door is closed, the mechanical lock block causes the gate to swing upward, which in turn causes the swing arm of the swing-arm sensor to swing upward.

3. The electromechanical linkage safety switch for an injection molding machine according to claim 2, characterized in that, The bottom of the switch fixing base is provided with a first mounting hole, and the switch fixing base is fixedly connected to the fixed template through the first mounting hole. The length direction of the first mounting hole is parallel to the length direction of the locking rod. The switch mounting base has a vertical second mounting hole on one side. The swing arm sensor is fixedly connected to the switch mounting base through the second mounting hole. Both the first mounting hole and the second mounting hole are elongated holes.

4. The electromechanical linkage safety switch for an injection molding machine according to claim 3, characterized in that, The switch mounting base includes, from bottom to top, a first horizontal part, a first vertical part, and a second horizontal part, which are connected by the first vertical part to form a Z-shaped body. The first mounting hole is located in the first horizontal part, and the second mounting hole is located in the first vertical part. The second horizontal part is used to cover the top of the electrical induction switch.

5. The electromechanical linkage safety switch for an injection molding machine according to claim 1, characterized in that, The mechanical lock switch also includes a first limiting member, which is installed on the fixed template. The first limiting member and the gate fixing shaft are located on opposite sides of the guide hole.

6. The electromechanical linkage safety switch for an injection molding machine according to claim 1, characterized in that, The mechanical lock switch also includes a second limiting member, which is installed on the fixed template and is located below and close to the gate plate fixing shaft.

7. The electromechanical linkage safety switch for an injection molding machine according to claim 6, characterized in that, The gate includes a gate shaft, a first snap-fit ​​portion, a first mounting portion, and a first transition portion. The first mounting portion and the gate fixing shaft are rotatably connected. The first transition portion is located at one end of the first mounting portion near the guide hole. The gate shaft is located at the other end of the first mounting portion away from the guide hole. The first snap-fit ​​portion is located at one end of the first transition portion near the guide hole. The first mounting part is located above the second limiting member, and one end of the first transition part is inclined upward. When the movable door is opened, the first snap-fit ​​part blocks the guide hole or is snapped into the locking rod.

8. The electromechanical linkage safety switch for an injection molding machine according to claim 7, characterized in that, The mechanical lock block includes a pressing part, a guiding part, and a second mounting part. The second mounting part is mounted on the movable door. The pressing part is horizontally arranged at one end of the second mounting part near the gate plate. The guiding part is horizontally arranged at one end of the pressing part near the gate plate. The length direction of the guide portion is parallel to the length direction of the movable door. The guide portion gradually tilts upward towards the closing direction of the movable door. The guide portion is used to guide the gate shaft of the gate plate to move downward along the lower surface of the guide portion to the pressing portion when the movable door is closed. The pressing portion is used to press the gate shaft of the gate plate when the movable door is closed.

9. The electromechanical linkage safety switch for an injection molding machine according to claim 1, characterized in that, The locking rod is provided with multiple second locking parts along the axis. Each second locking part includes a first column, a second column, and a second transition part. The first column is connected to the second column through the second transition part. The diameter of the first column is larger than that of the second column. A limiting ring is formed between the first column and the second column of the adjacent second locking part. The limiting ring faces the gate. When the movable door is opened, the gate is engaged with the second column of one of the second engagement parts.

10. The electromechanical linkage safety switch for an injection molding machine according to claim 2, characterized in that, The swing arm sensor is also equipped with a roller, which is located at the free end of the swing arm; when the movable door is closed, the gate and the roller abut against each other.

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