Anti-pinch device for die casting machine

Abstract

The application provides a die casting machine anti-misclamping device and belongs to the technical field of die casting machines. The device comprises a machining table, a fixed mold installed on the top of the machining table, a movable mold installed on the top area of the fixed mold, and a movable plate installed on the top of the movable mold. A locking mechanism is installed inside the machining table. The locking mechanism comprises two lifting shafts, two first gears, two second gears, and a cylinder. The bottom of the second gear is provided with an engaging gear disc, and the output shaft area of the cylinder is provided with a positioning gear disc. A detection mechanism is installed around the machining table. The detection mechanism comprises an infrared emission light curtain arranged around the top table and an infrared receiving light curtain installed around the machining table. When other objects are detected during die casting, the locking mechanism operates, the gear disc is clamped, the gears are engaged, the lifting shafts are limited, and the movable mold is fixed to prevent misclamping and ensure the safety of the equipment and personnel installation.

Description

Technical Field

[0001] This invention relates to the field of die-casting machine technology, and specifically to a die-casting machine anti-clamping device. Background Technology

[0002] Die casting machines are machines used for pressure casting. They include both hot-chamber and cold-chamber types, and are further divided into vertical and horizontal types. Under pressure, the die casting machine injects molten metal into a mold to cool and solidify. After the mold is opened, a solid metal casting is obtained. It was initially used for die casting type. With the advancement of science and technology and industrial production, especially with the development of industries such as automobiles, motorcycles, and household appliances, die casting technology has developed extremely rapidly.

[0003] Under normal mold-opening conditions, the moving mold plate in a die-casting machine will not move. However, in long-term operation, the electrical or hydraulic systems of a die-casting machine may inevitably experience certain malfunctions, causing the moving mold plate to malfunction and accidentally close. This can lead to serious personal injury accidents. In addition, if workers or robotic arms approach the machine during operation due to programming errors, it can also easily cause injury to personnel and damage to the equipment. Summary of the Invention

[0004] The present invention mainly provides a die-casting machine anti-clamping device to solve the technical problems mentioned in the background art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A die-casting machine anti-clamping device includes a processing table, a top platform is provided on the top area of ​​the processing table, a hydraulic cylinder is installed on the top of the top platform, a fixed mold is installed on the top of the processing table, a moving mold connected to the hydraulic cylinder is installed on the top area of ​​the fixed mold, a movable plate is installed on the top of the moving mold, the processing table has a cavity structure and a partition is provided inside, the partition divides the interior of the processing table into an upper cavity layer and a lower cavity layer;

[0007] The processing table is equipped with a locking mechanism, which includes two lifting shafts installed on both sides of the bottom of the movable plate and extending to the lower cavity layer, two first gears and two second gears rotatably connected to the bottom of the upper cavity layer, and a cylinder installed at the bottom of the lower cavity layer. The first gears and second gears on the same side mesh with each other. The lower end of the lifting shaft is threaded and connected to the wheel center of the first gear through internal and external threads. The bottom of the second gear is equipped with a meshing gear plate extending to the lower cavity layer. The output shaft area of ​​the cylinder is equipped with a positioning gear plate located at the bottom of the meshing gear plate.

[0008] A detection mechanism is installed around the processing table. The detection mechanism includes an infrared emitting light curtain installed around the top table and an infrared receiving light curtain installed around the processing table.

[0009] Further, in the present invention, a PLC controller and an audible and visual alarm are installed on the front side of the processing table, and all the electrical components of the device are electrically connected to the PLC controller.

[0010] Further, in the present invention, the length and width of the top of the processing table are both greater than those of the top table, an extension frame is installed around the top table, and the infrared emission light curtain is installed at the bottom of the extension frame.

[0011] Further, in the present invention, multiple infrared emission light curtains and multiple infrared reception light curtains are distributed in a "square" shape.

[0012] Further, in the present invention, four guide rods are provided around the top of the processing table, and all four guide rods pass through the movable plate and are connected to the top table.

[0013] Further, in the present invention, when the movable plate is at the topmost position between the processing table and the top table, the bottom height of the lifting shaft exceeds the bottom height of the first gear.

[0014] Further, in the present invention, a connecting plate is installed on the output shaft of the cylinder, and two positioning gear discs are respectively connected to both ends of the top of the connecting plate.

[0015] Further, in the present invention, guide shafts are fixed in the lower cavity layer regions on both sides of the connecting plate, and the connecting plate is slidably connected to the two guide shafts.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, a movable plate is installed on the moving die, a set of locking mechanisms are installed at the bottom of the movable plate, and an infrared light curtain is used to detect whether there are other objects nearby when die casting is performed on the processing table. When other objects are detected, the locking mechanisms operate, and the gear discs are clamped and the gears are engaged, thereby restricting the lifting shaft and then fixing the moving die, preventing the occurrence of misclamping. At the same time, the audible and visual alarm operates to remind the staff to check, ensuring the safety of the equipment and the installation of personnel.

[0018] The following will explain the present invention in detail in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the overall structure (cross-section of the processing table) of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of the top region of the processing table of the present invention;

[0022] Figure 4 This is a first-view schematic diagram of the internal structure of the processing table of the present invention;

[0023] Figure 5 This is a second-view schematic diagram of the internal structure of the processing table of the present invention.

[0024] In the diagram: 10. Processing table; 11. Partition; 111. Upper cavity layer; 112. Lower cavity layer; 12. Guide rod; 20. Top platform; 21. Extension frame; 30. Hydraulic cylinder; 40. Fixed mold; 50. Moving mold; 51. Movable plate; 60. Locking mechanism; 61. Lifting shaft; 62. First gear; 63. Second gear; 64. Cylinder; 65. Meshing gear plate; 66. Positioning gear plate; 67. Connecting plate; 68. Guide shaft; 70. Detection mechanism; 71. Infrared emitting light curtain; 72. Infrared receiving light curtain; 80. PLC controller; 90. Audible and visual alarm. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] For an example, please refer to the appendix. Figure 1-5, A die-casting machine anti-misclamping device, including a processing table 10. A top table 20 is arranged in the top area of the processing table 10. A hydraulic cylinder 30 is installed on the top of the top table 20. A fixed mold 40 is installed on the top of the processing table 10. A moving mold 50 connected to the hydraulic cylinder 30 is installed in the top area of the fixed mold 40. A movable plate 51 is installed on the top of the moving mold 50. The processing table 10 is of a cavity structure and a partition 11 is arranged inside. The partition 11 divides the interior of the processing table 10 into an upper cavity layer 111 in the upper layer and a lower cavity layer 112 in the lower layer;

[0029] A locking mechanism 60 is installed inside the processing table 10. The locking mechanism 60 includes two lifting shafts 61 installed on both sides of the bottom of the movable plate 51 and penetrating to the lower cavity layer 112, two first gears 62 and two second gears 63 rotatably connected to the bottom of the upper cavity layer 111, and a cylinder 64 installed on the bottom of the lower cavity layer 112. The first gears 62 and the second gears 63 on the same side are meshed with each other. The lower end of the lifting shaft 61 is provided with threads and is connected to the center of the first gear 62 in a manner of internal and external threads. A meshing tooth disc 65 penetrating to the lower cavity layer 112 is installed at the bottom of the second gear 63. A positioning tooth disc 66 located at the bottom of the meshing tooth disc 65 is installed in the output shaft area of the cylinder 64;

[0030] A detection mechanism 70 is installed around the processing table 10. The detection mechanism 70 includes an infrared emission light curtain 71 arranged around the top table 20 and an infrared reception light curtain 72 installed around the processing table 10.

[0031] Specifically, please refer to the appendix Figure 1 , A PLC controller 80 and an audible and visual alarm 90 are installed on the front side of the processing table 10. All the electrical components of this device are electrically connected to the PLC controller 80;

[0032] It should be noted that in this embodiment, all the electrical components of this device are externally connected to a power supply. At the same time, the PLC controller 80 is a conventional electrical component and will not be introduced in detail. When the die-casting machine is operating, if an object passes between the infrared emission light curtain 71 and the infrared reception light curtain 72, while the locking mechanism 60 locks the movement of the moving mold 50, the audible and visual alarm 90 simultaneously issues an alarm to remind the staff to check the cause and the fault.

[0033] Specifically, please refer to the appendix Figure 3 , The length and width of the top of the processing table 10 are both greater than the length and width of the top table 20. An extension frame 21 is installed around the top table 20. The infrared emission light curtain 71 is installed at the bottom of the extension frame 21;

[0034] Furthermore, multiple infrared emission light curtains 71 and multiple infrared reception light curtains 72 are distributed in a "mouth" shape;

[0035] It should be noted that in this embodiment, the infrared emission light curtain 71 and the infrared reception light curtain 72 distributed in a "mouth" shape and located on the overall outer side of the processing table 10 and the top table 20 can detect the surrounding area of the processing table 10 more comprehensively, thereby preventing objects from entering the processing area.

[0036] Specifically, please refer to the appendix Figure 2 , four guide rods 12 are provided on the top periphery of the processing table 10, and the four guide rods 12 all penetrate through the movable plate 51 and are connected to the top table 20;

[0037] It should be noted that in this embodiment, when the movable plate 51 moves up and down, it will slide on the guide rod 12. Through the guide rod 12, the lifting of the movable plate 51 and the lifting shaft 61 can be more stable.

[0038] Specifically, please refer to the appendix Figure 2 , when the movable plate 51 is at the top between the processing table 10 and the top table 20, the bottom height of the lifting shaft 61 exceeds the bottom height of the first gear 62;

[0039] It should be noted that in this embodiment, the lifting shaft 61 needs to ensure that it is always in contact with the first gear 62 to prevent the first gear 62 and the lifting shaft 61 from disengaging. After that, when the lifting shaft 61 enters the first gear 62 again, if the first gear 62 rotates due to the engagement of the meshing tooth disc 65 and the positioning tooth disc 66, the lifting shaft 61 cannot be smoothly inserted into the first gear 62, affecting locking and die casting.

[0040] Specifically, please refer to the appendix Figure 5 , a connecting plate 67 is installed on the output shaft of the air cylinder 64, and the two positioning tooth discs 66 are respectively connected to both ends of the top of the connecting plate 67;

[0041] It should be noted that in this embodiment, by operating one air cylinder 64, the two positioning tooth discs 66 can be synchronously lifted for locking, so as to achieve synchronization and stability.

[0042] Specifically, please refer to the appendix Figure 5 , guide shafts 68 are fixed in the lower cavity layer 112 area on both sides of the connecting plate 67, and the connecting plate 67 is slidably connected to the two guide shafts 68;

[0043] It should be noted that in this embodiment, the guide shaft 68 has a guiding function, so that both sides of the connecting plate 67 have better support.

[0044] The specific operation mode of the present invention is as follows:

[0045] When the device is die-casting, the hydraulic cylinder 30 operates to lower the moving mold 50. If an object is between the infrared emitting light curtain 71 and the infrared receiving light curtain 72, the PLC controller 80 will cause the cylinder 64 to operate, thereby causing the positioning gear plate 66 to rise and lock the meshing gear plate 65, thus fixing the second gear 63. Since the second gear 63 meshes with the first gear 62, the first gear 62 cannot rotate, so the lifting shaft 61 cannot descend, thus fixing the position of the movable plate 51 and the moving mold 50. At the same time, the hydraulic cylinder 30 stops operating, and the audible and visual alarm 90 operates to remind the staff to check for unexpected situations.

[0046] At the same time, when the device is not performing die casting, the cylinder 64 will also operate, causing the positioning gear plate 66 to rise and lock the meshing gear plate 65, thereby locking the moving mold 50 and increasing stability.

[0047] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A device for preventing accidental clamping in a die-casting machine, comprising a processing table (10), characterized in that, A top table (20) is provided in the top area of the processing table (10). A hydraulic cylinder (30) is installed on the top of the top table (20). A fixed mold (40) is installed on the top of the processing table (10). A moving mold (50) connected to the hydraulic cylinder (30) is installed in the top area of the fixed mold (40). A movable plate (51) is installed on the top of the moving mold (50). The processing table (10) is of a cavity structure and a partition plate (11) is provided inside. The partition plate (11) divides the interior of the processing table (10) into an upper cavity layer (111) in the upper layer and a lower cavity layer (112) in the lower layer; A locking mechanism (60) is installed inside the processing table (10). The locking mechanism (60) includes two lifting shafts (61) installed on both sides of the bottom of the movable plate (51) and penetrating to the lower cavity layer (112), two first gears (62) and two second gears (63) rotatably connected to the bottom of the upper cavity layer (111), and a cylinder (64) installed on the bottom of the lower cavity layer (112). The first gear (62) and the second gear (63) on the same side are meshed with each other. The lower end of the lifting shaft (61) is provided with threads and is connected to the center of the first gear (62) by an internal and external thread method. A meshing tooth disc (65) penetrating to the lower cavity layer (112) is installed at the bottom of the second gear (63). A positioning tooth disc (66) located at the bottom of the meshing tooth disc (65) is installed in the output shaft area of the cylinder (64); A detection mechanism (70) is installed around the processing table (10). The detection mechanism (70) includes an infrared emission light curtain (71) provided around the top table (20) and an infrared reception light curtain (72) installed around the processing table (10).

2. The anti-clamping device for a die-casting machine according to claim 1, characterized in that, A PLC controller (80) and an audible and visual alarm (90) are installed on the front side of the processing table (10). All the electrical components of this device are electrically connected to the PLC controller (80).

3. The anti-clamping device for a die-casting machine according to claim 1, characterized in that, The length and width of the top of the processing table (10) are both greater than those of the top table (20). An extension frame (21) is installed around the top table (20). The infrared emission light curtain (71) is installed at the bottom of the extension frame (21).

4. The anti-clamping device for a die-casting machine according to claim 2, characterized in that, Multiple infrared emission light curtains (71) and multiple infrared reception light curtains (72) are distributed in a "mouth" shape.

5. The anti-clamping device for a die-casting machine according to claim 1, characterized in that, Four guide rods (12) are provided around the top of the processing table (10). All four guide rods (12) penetrate the movable plate (51) and are connected to the top table (20).

6. The anti-clamping device for a die-casting machine according to claim 1, characterized in that, When the movable plate (51) is at the topmost position between the processing table (10) and the top table (20), the bottom height of the lifting shaft (61) exceeds the bottom height of the first gear (62).

7. The anti-clamping device for a die-casting machine according to claim 1, characterized in that, A connecting plate (67) is installed on the output shaft of the cylinder (64). The two positioning tooth discs (66) are respectively connected to both ends of the top of the connecting plate (67).

8. The anti-clamping device for a die-casting machine according to claim 7, characterized in that, Guide shafts (68) are fixed in the area of the lower cavity layer (112) on both sides of the connecting plate (67). The connecting plate (67) is slidably connected to the two guide shafts (68).

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