A device for alarming and protecting when the tonnage of a die casting machine exceeds the limit

Abstract

The utility model discloses a kind of die-casting machine tonnage overrun alarm protection devices, belong to die-casting machine alarm protection technical field, including multiple guide rods, multiple the guide rod is commonly provided with movable mould and fixed mould, the movable mould one end drive is equipped with hydraulic drive oil cylinder, the fixed mould is internally provided with mounting groove, the mounting groove is internally provided with integrated shell, the integrated shell is internally fixed with mounting ring, the integrated shell top end slidingly penetrates and is touched pressure push block;When the die-casting machine tonnage overrun alarm protection device when locking force overrun, the pressure received by touch pressure push block is buffered after preliminary buffering by multiple first springs, drive pressure touch sensor linkage mounting disc, make it produce elastic displacement in buffer shell by compressing second spring, to realize the secondary buffering and overload avoidance of pressure touch sensor, to suppress instantaneous impact, further reduce the damage caused by instantaneous impact to pressure touch sensor.

Description

Technical Field

[0001] This utility model specifically relates to an alarm protection device for over-tonnage of a die-casting machine, belonging to the field of die-casting machine alarm technology. Background Technology

[0002] During operation, die casting machines require a huge clamping force to ensure that molten metal can fully fill the mold and prevent leakage. If the clamping force exceeds the equipment's tolerance, it may cause equipment damage, mold breakage, or production accidents. The die casting machine tonnage over-limit alarm protection device is used to monitor the clamping force of the die casting machine and issue an alarm signal when the clamping force exceeds the set safety range.

[0003] Currently, some die-casting machine over-tolerance alarm protection devices use pressure-contact sensors directly installed on the moving mold side. When the clamping force exceeds the limit during the clamping process, the moving mold and the sensor will have direct rigid collision contact, causing the sensor to be structurally damaged or fail to measure due to the instantaneous impact load exceeding the range, which in turn causes the protection system to malfunction or completely fail. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a die-casting machine tonnage over-limit alarm protection device. It includes multiple sets of guide rods, on which a moving mold and a fixed mold are jointly mounted. One end of the moving mold is driven by a hydraulic cylinder. The fixed mold has an internal mounting groove, inside which an integrated housing is housed. An mounting ring is fixed inside the integrated housing. A pressure pusher block slides through the top of the integrated housing. Multiple sets of first springs are arranged around one end of the pressure pusher block and the mounting ring. A buffer shell is also provided inside the integrated housing. An mounting plate slides through the top of the buffer shell. A second spring is arranged between the mounting plate and the buffer shell. A pressure sensor, positioned opposite the pressure pusher block, is mounted on the mounting plate. The pressure sensor signal is connected to an audible and visual alarm.

[0005] A laser rangefinder is embedded inside the mold. The pressure sensor is connected to a PLC controller. The PLC controller is connected to a temperature sensor, a timer, and a switch for the hydraulic cylinder. The PLC controller signal is also connected to an audible and visual alarm and the laser rangefinder signal.

[0006] An installation bracket is fixedly provided at the bottom of the integrated housing. A screw rod is threaded through the middle of the installation bracket. One end of the screw rod is rotatably connected to the bottom of the buffer shell. The buffer shell and the inner wall of the integrated housing are slidably connected.

[0007] A groove is provided on one side of the buffer shell, and a scale plate is installed on the edge of the groove. A slider extending into the groove is installed on one side of the integrated shell, and a pointer is installed on the other end of the slider.

[0008] The bottom outer wall of the integrated housing has an external thread, and the bottom of the mounting groove has a corresponding internal thread.

[0009] The top of the integrated housing has a rotating groove.

[0010] Beneficial effects:

[0011] When the clamping force exceeds the limit, the pressure on the pressure push block is initially buffered by multiple sets of first springs, which then drive the pressure sensor to move in conjunction with the mounting plate. By compressing the second spring, the pressure sensor is elastically displaced within the buffer housing, thereby achieving secondary buffering and overload avoidance for the pressure sensor, suppressing instantaneous impact, and further reducing the damage caused by instantaneous impact to the pressure sensor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the fixed mold structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the integrated shell structure of this utility model;

[0015] Figure 4 This is a cross-sectional view of the integrated shell structure of this utility model;

[0016] Figure 5 This is a schematic diagram of the system structure of this utility model.

[0017] In the diagram: 1. Guide rod; 2. Moving mold; 3. Fixed mold; 4. Hydraulic drive cylinder; 5. Mounting groove; 6. Integrated housing; 7. Mounting ring; 8. Pressing push block; 9. First spring; 10. Buffer housing; 11. Mounting plate; 12. Pressure sensor; 13. Second spring; 14. Laser rangefinder; 15. Slide groove; 16. Slider; 17. Pointer; 18. Scale plate; 19. Mounting bracket; 20. Screw; 21. Rotating groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5As shown, a die-casting machine over-tolerance alarm protection device includes multiple sets of guide rods 1. A moving mold 2 and a fixed mold 3 are mounted on the multiple sets of guide rods 1. A hydraulic cylinder 4 is driven at one end of the moving mold 2. An installation groove 5 is opened inside the fixed mold 3. An integrated housing 6 is installed inside the installation groove 5. An installation ring 7 is fixed inside the integrated housing 6. A pressure pusher 8 slides through the top of the integrated housing 6. Multiple sets of first springs 9 surround one end of the pressure pusher 8 and the installation ring 7. A buffer shell 10 is also provided inside the integrated housing 6. An installation plate 11 slides through the top of the buffer shell 10. A second spring 13 is arranged between the installation plate 11 and the buffer shell 10. A pressure sensor 12, positioned opposite the pressure pusher 8, is mounted on the installation plate 11. The pressure sensor 12 is connected to an audible and visual alarm. The multiple sets of guide rods 1 are used to support and guide the closing and opening actions of the moving mold 2 and the fixed mold 3, ensuring the alignment and stability of the mold. The hydraulic cylinder 4 is used to drive the moving mold 2 along the guide rods. Rod 1 moves, which is the basic structure of the die-casting machine and will not be described in detail here. During operation, the hydraulic cylinder 4 drives the moving mold 2 to move along the guide rod 1 towards the fixed mold 3 to begin mold closing. When the clamping force exceeds the limit, as the moving mold 2 approaches, the pressure push block 8 begins to be subjected to pressure from the moving mold 2. The pressure on the pressure push block 8 is first buffered by multiple sets of first springs 9 to absorb the impact energy and reduce rigid impact. Then, the pressure push block 8 continues to move towards the pressure sensor 12 and finally contacts the pressure sensor 12. The pressure sensor 12 detects the pressure signal, determines that the clamping force has exceeded the limit, and sends an over-limit signal to the audible and visual alarm. The audible and visual alarm sounds and lights to remind the operator. At the same time, during this process, when the pressure push block 8 contacts and pushes the pressure sensor 12, the pressure sensor 12 will push the mounting plate 11 to compress the second spring 13 into the buffer shell 10 for elastic avoidance, so as to reduce the damage to the pressure sensor 12 caused by the instantaneous impact.

[0020] Furthermore, a laser rangefinder 14 is embedded inside the fixed mold 3, and a pressure sensor 12 is connected to a PLC controller. The PLC controller is connected to a temperature sensor, a timer, and the switch of the hydraulic drive cylinder 4. The PLC controller signal is also connected to an audible and visual alarm and the laser rangefinder 14 signal. The temperature sensor, which is an infrared thermometer, is used to monitor the mold temperature, and its temperature measurement range covers the melting point of the mold material. During operation, in the mold closing process, the PLC controller monitors the displacement speed of the moving mold 2 in real time through the laser rangefinder 14. If its movement speed is consistently below the threshold and the time exceeds the preset value of the timer, it is determined to be a mechanical jam or hydraulic failure. The switch of the hydraulic drive cylinder 4 is immediately cut off to prevent the moving mold 2 or the guide rod 1 from bending and deforming due to uneven force, thus avoiding further damage to these components. After the mold is closed, if the infrared temperature sensor detects an abnormal peak in the local temperature of the mold, the PLC determines that there is a risk of melt leakage and will also forcibly shut down the hydraulic drive cylinder 4 to prevent mold explosion accidents and ensure equipment and production safety.

[0021] Furthermore, a mounting bracket 19 is fixedly installed at the bottom of the integrated housing 6. A screw 20 is threaded through the middle of the mounting bracket 19. One end of the screw 20 is rotatably connected to the bottom of the buffer housing 10, and the buffer housing 10 is slidably connected to the inner wall of the integrated housing 6. A slide groove 15 is opened on one side of the buffer housing 10, and a scale plate 18 is installed on the edge of the slide groove 15. A slider 16 extending into the slide groove 15 is installed on one side of the integrated housing 6, and a pointer 17 is installed on the other end of the slider 16. During operation, by rotating the screw 20, the rotation of the screw 20 is converted into linear movement of the buffer housing 10. During this process, the slider 16 slides synchronously in the slide groove 15, and the pointer 17 moves on the scale plate 18 accordingly. The operator can adjust the position of the buffer housing 10 according to the scale value indicated by the pointer 17 to change the distance between the pressure push block 8 and the pressure sensor 12 to adapt to different mold closing distance requirements.

[0022] Furthermore, the bottom outer wall of the integrated housing 6 is provided with external threads, and the bottom interior of the mounting groove 5 is provided with corresponding internal threads; the top of the integrated housing 6 is provided with a rotating groove 21; during operation, the integrated housing 6 can be easily rotated by personnel through the rotating groove 21, so that the integrated housing 6 can be rotated out of the mounting groove 5, thereby facilitating maintenance, replacement and adjustment operations.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A die-casting machine over-tolerance alarm protection device, comprising multiple sets of guide rods (1), characterized in that: Multiple sets of guide rods (1) are provided with a moving mold (2) and a fixed mold (3). One end of the moving mold (2) is driven by a hydraulic cylinder (4). The fixed mold (3) has an installation groove (5) inside. An integrated housing (6) is provided inside the installation groove (5). An installation ring (7) is fixed inside the integrated housing (6). A pressure push block (8) slides through the top of the integrated housing (6). Multiple sets of first springs (9) are arranged around one end of the pressure push block (8) and the installation ring (7). A buffer shell (10) is also provided inside the integrated housing (6). An installation plate (11) slides through the top of the buffer shell (10). A second spring (13) is arranged between the installation plate (11) and the buffer shell (10). A pressure sensor (12) is installed on the installation plate (11) opposite to the pressure push block (8). The pressure sensor (12) is connected to an audible and visual alarm.

2. The die-casting machine tonnage over-limit alarm protection device as described in claim 1, characterized in that: A laser rangefinder (14) is embedded inside the fixed mold (3). The pressure sensor (12) is connected to a PLC controller. The PLC controller is connected to a temperature sensor, a timer, and the switch of the hydraulic drive cylinder (4). The PLC controller signal is also connected to the sound and light alarm and the laser rangefinder (14) signal.

3. The die-casting machine over-tolerance alarm and protection device as described in claim 1, characterized in that: An installation bracket (19) is fixedly provided at the bottom of the integrated housing (6). A screw (20) is threaded through the middle of the installation bracket (19). One end of the screw (20) is rotatably connected to the bottom of the buffer shell (10). The buffer shell (10) and the inner wall of the integrated housing (6) are slidably connected.

4. The die-casting machine tonnage over-limit alarm protection device as described in claim 1, characterized in that: The buffer shell (10) has a groove (15) on one side, and a scale plate (18) is installed on the edge of the groove (15). The integrated shell (6) has a slider (16) extending into the groove (15) on one side, and a pointer (17) is installed on the other end of the slider (16).

5. The die-casting machine tonnage over-limit alarm protection device as described in claim 1, characterized in that: The bottom outer wall of the integrated housing (6) is provided with an external thread, and the bottom interior of the mounting groove (5) is provided with an internal thread.

6. The die-casting machine over-tolerance alarm protection device as described in claim 1, characterized in that: The top of the integrated housing (6) is provided with a rotating groove (21).

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