A safety protection device for core-making machine
By designing automated safety protection devices on the core-making machine, and utilizing the extrusion and sensing components that work in concert with the PLC controller, automatic protection without human intervention is achieved, solving the safety hazard of mechanical pinching during core-making machine production, and improving operational safety and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI CHANGDASHENG PRECISION CASTING CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-30
AI Technical Summary
In existing core-making machine production, high-risk operations by operators between opening and closing the box can easily lead to mechanical pinching accidents. Temporary shim protection solutions disrupt the production rhythm and lack mandatory interlocking functions, thus failing to provide effective protection.
Design a safety protection device, including a mounting frame, a squeezing component, a sensing component, and a protective component. Utilize a PLC controller to work in conjunction with the device to automatically install pads to form a physical isolation barrier, avoiding the risk of pinching injuries caused by accidental closure of the equipment.
It achieves automatic protection without manual intervention during the core-making machine production process, eliminating the risk of mechanical pinching injuries and improving operational safety and production efficiency.
Smart Images
Figure CN224424209U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of core-making machine production technology, specifically a safety protection device for core-making machine production. Background Technology
[0002] As a core-making device in the foundry industry, the hot-box core shooter's automated cyclic operation mode (closing the box - sand shooting - solidification - opening the box - core removal) greatly improves production efficiency. However, in the operation zone between opening and closing the box, operators must repeatedly insert their arms between the two core boxes to perform high-risk operations such as core removal, cleaning, and loose-piece installation. This manual operation mode is highly susceptible to mechanical pinching accidents in case of equipment malfunction or misoperation, and has become a major safety hazard in foundry workshops.
[0003] The current industry-standard temporary shim protection scheme has significant drawbacks: First, frequent disassembly and reassembly of the shims severely disrupts the normal production rhythm, leading to low operator compliance; second, the protective device lacks a mandatory interlocking function, failing to technically prevent violations; and third, the human-machine interface lacks a safety warning system, making it difficult to identify dangerous working conditions in a timely manner. This passive protection mode, relying on human awareness, has an extremely high failure rate in actual production. Therefore, we propose a safety protection device for core-making machine production. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a safety protection device for core making machine production, which can automatically add pads after the box is opened to avoid mechanical pinching accidents, and can effectively solve the problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety protection device for core-making machine production, comprising an installation frame and core-making components;
[0006] Mounting frame: A bracket is fixed on the lower side, a protective component is installed on the lower side inside the bracket, a fixing component is installed on the front and rear sides inside the mounting frame, two corresponding pressing components are installed on the left and right ends of the upper side of the mounting frame, and two corresponding sensing components are installed on the left and right ends of the lower side of the mounting frame. The pressing component and the sensing component cooperate with each other.
[0007] Core-making assembly: includes hydraulic rods, connecting plates, and core boxes. Two corresponding core boxes are provided at the left and right ends of the upper side of the mounting frame. Two corresponding hydraulic rods are installed on the left and right sides inside the mounting frame. The telescopic arms of the four hydraulic rods are respectively fixed to the sides of the two core boxes. The two core boxes are respectively connected to two extrusion assemblies. The protective assembly is located between the two core boxes. The input end of the hydraulic rod is electrically connected to the output end of an external PLC controller. Core making is performed by setting up the core-making assembly.
[0008] Furthermore, the extrusion assembly includes a fixing ring, a sliding rod, a connector, a first spring, and an extrusion head. Two corresponding sliding holes are formed at the left and right ends of the upper side of the mounting frame. A fixing ring is fixed inside the sliding hole, and a sliding rod is slidably connected inside the fixing ring. A connector is fixed to the lower end of the sliding rod, and a first spring is sleeved on the circumferential surface of the sliding rod. The lower end of the first spring is fixed to the upper end of the connector, and the upper end of the first spring is fixed to the lower end of the fixing ring. An extrusion head is fixed to the upper end of the sliding rod. The lower side of the core box is respectively abutted against the two extrusion heads. The extrusion assembly is used to extrude the first pressure sensor.
[0009] Furthermore, the sensing component includes a mounting bracket and a first pressure sensor. Two corresponding mounting brackets are fixed at the left and right ends of the lower side of the mounting frame. A groove is provided on the lower side inside the mounting bracket. The first pressure sensor is installed inside the groove. The first pressure sensor is in contact with the corresponding connector. The first pressure sensor is bidirectionally electrically connected to an external PLC controller. By setting the sensing component, the external PLC controller can easily determine the position of the core box.
[0010] Furthermore, the protective assembly includes an electric telescopic rod, a limiting strip, a pad, a pad plate, and a second pressure sensor. An electric telescopic rod is mounted on the upper side of the bracket. A limiting strip is fixed to the telescopic arm of the electric telescopic rod, and the limiting strip is in contact with the lower side of the mounting frame. A pad is fixed to the upper side of the limiting strip, and two corresponding pads are fixed to the left and right sides of the pad. The two pads are respectively in contact with the sides of the two core boxes. Two corresponding mounting holes are opened on the upper side of the limiting strip, and a second pressure sensor is installed inside the mounting holes. The second pressure sensor is in contact with the lower side of the mounting frame and is bidirectionally electrically connected to an external PLC controller. By setting up the protective assembly, the two core boxes can be supported after separation, thereby avoiding mechanical pinching accidents.
[0011] Furthermore, the fixing component includes a slide groove, a slide bar, and a support frame. The limiting bar is provided with two corresponding support frames. The slide bar is fixed to the side of the support frame. Two corresponding slide grooves are opened on the front and rear sides inside the mounting frame. The slide bar is slidably connected inside the corresponding slide groove. The limiting bar is supported by the fixing component.
[0012] Furthermore, the fixing assembly also includes a fixing frame, a guide rod, a metal plate, a second spring, and an electromagnet. The fixing frame is fixed inside the slide groove, and the guide rod is slidably connected inside the fixing frame. The guide rod is fixed to the side of the corresponding slide bar, and the other end of the guide rod is fixed to a metal plate. An electromagnet is installed inside the slide groove, and the electromagnet corresponds to the metal plate. A second spring is sleeved on the circumference of the guide rod, with one end fixed to the side of the slide bar and the other end fixed to the side of the fixing frame. The input end of the electromagnet is electrically connected to the output end of an external PLC controller. By setting the electromagnet to attract the metal plate, the two support frames can be moved more easily.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This safety protection device for core-making machine production has the following advantages:
[0014] Through the coordinated control of the sensing and protective components, the protective structure is automatically triggered to rise to the working area after the core box is separated, forming a physical isolation barrier. This process does not require manual intervention, and after the protective device is in place, the moving parts of the equipment are locked by the feedback signal of the pressure sensor, thus eliminating the risk of pinching injury caused by accidental closure of the equipment from the root. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the front structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the protective component structure of this utility model;
[0017] Figure 3 This is a schematic diagram of the fixing component structure of this utility model.
[0018] In the diagram: 1. Mounting frame, 2. Bracket, 3. Core-making assembly, 31. Hydraulic rod, 32. Connecting plate, 33. Core box, 4. Extrusion assembly, 41. Fixing ring, 42. Slide rod, 43. Connector, 44. First spring, 45. Extrusion head, 5. Sensing assembly, 51. Fixing bracket, 52. First pressure sensor, 6. Protective assembly, 61. Electric telescopic rod, 62. Limiting strip, 63. Pad, 64. Pad plate, 65. Second pressure sensor, 7. Fixing assembly, 71. Slide groove, 72. Fixing frame, 73. Guide rod, 74. Metal plate, 75. Second spring, 76. Slide bar, 77. Support frame, 78. Electromagnet. Detailed Implementation
[0019] 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.
[0020] Please see Figure 1-3 This embodiment provides a technical solution: a safety protection device for core-making machine production, including a mounting frame 1 and a core-making component 3;
[0021] Mounting frame 1: A bracket 2 is fixed to the lower side. A protective component 6 is installed inside the lower side of the bracket 2. Fixing components 7 are installed on the front and rear sides inside the mounting frame 1. Two corresponding pressing components 4 are installed on the left and right ends of the upper side of the mounting frame 1. Two corresponding sensing components 5 are installed on the left and right ends of the lower side of the mounting frame 1. The pressing components 4 and the sensing components 5 cooperate with each other. The pressing component 4 includes a fixing ring 41, a sliding rod 42, a connector 43, a first spring 44, and a pressing head 45. Two corresponding sliding holes are opened on the left and right ends of the upper side of the mounting frame 1. A fixing ring 41 is fixed inside the sliding hole. A sliding rod 42 is slidably connected inside the fixing ring 41. A connector 43 is fixed to the lower end of the sliding rod 42. A first spring 44 is sleeved on the circumferential surface of the sliding rod 42. The lower end of the first spring 44 is fixed to the upper end of the connector 43, and the upper end of the first spring 44 is fixed to the lower end of the fixing ring 41. The upper end of the slide rod 42 is fixed with the extrusion head 45. The lower side of the core box 33 is respectively attached to the two extrusion heads 45. The sensing component 5 includes a fixing frame 51 and a first pressure sensor 52. Two corresponding fixing frames 51 are fixed at the left and right ends of the lower side of the mounting frame 1. The lower side of the fixing frame 51 has a groove, and the first pressure sensor 52 is installed inside the groove. The first pressure sensor 52 is attached to the corresponding connector 43 and is bidirectionally electrically connected to the external PLC controller. The protective component 6 includes an electric telescopic rod 61, a limit strip 62, a pad 63, a pad plate 64, and a second pressure sensor. 65. An electric telescopic rod 61 is installed on the upper side of the bracket 2. A limit strip 62 is fixed on the telescopic arm of the electric telescopic rod 61. The limit strip 62 is in contact with the lower side of the mounting frame 1. A pad 63 is fixed on the upper side of the limit strip 62. Two corresponding pads 64 are fixed on the left and right sides of the pad 63. The two pads 64 are in contact with the sides of the two core boxes 33 respectively. Two corresponding mounting holes are opened on the upper side of the limit strip 62. A second pressure sensor 65 is installed inside the mounting hole. The second pressure sensor 65 is in contact with the lower side of the mounting frame 1. The second pressure sensor 65 is bidirectionally electrically connected to an external PLC controller. The fixing component 7 includes a slide groove 71, a slide bar 76, and a support frame 77. Two corresponding support frames are set on the lower side of the limit strip 62. 77. A slide bar 76 is fixed to the side of the support frame 77. Two corresponding slide grooves 71 are opened on the front and rear sides inside the mounting frame 1. The slide bar 76 is slidably connected inside the corresponding slide groove 71. The fixing assembly 7 also includes a fixing frame 72, a guide rod 73, a metal plate 74, a second spring 75, and an electromagnet 78. The fixing frame 72 is fixed inside the slide groove 71. The guide rod 73 is slidably connected inside the fixing frame 72. The guide rod 73 is fixed to the side of the corresponding slide bar 76. The other end of the guide rod 73 is fixed to the metal plate 74. The electromagnet 78 is installed inside the slide groove 71. The electromagnet 78 corresponds to the metal plate 74. The second spring 75 is sleeved on the circumferential surface of the guide rod 73. One end of the second spring 75 is fixed to the side of the slide bar 76.The other end of the second spring 75 is fixed to the side of the fixed frame 72. The input end of the electromagnet 78 is electrically connected to the output end of the external PLC controller. The limiting bar 62 is supported by the fixing component 7, and the metal plate 74 is attracted by the electromagnet 78, thus facilitating the movement of the two support frames 77. The protective component 6 supports the two core boxes 33 after they are separated, thus preventing mechanical pinching accidents. The sensing component 5 allows the external PLC controller to determine the position of the core box 33. The pressing component 4 presses the first pressure sensor 52.
[0022] Core-making assembly 3: includes hydraulic rods 31, connecting plate 32 and core box 33. Two corresponding core boxes 33 are provided at the left and right ends of the upper side of the mounting frame 1. Two corresponding hydraulic rods 31 are installed on the left and right sides inside the mounting frame 1. The telescopic arms of the four hydraulic rods 31 are respectively fixed on the sides of the two core boxes 33. The two core boxes 33 are respectively connected to two extrusion assemblies 4. The protective assembly 6 is located between the two core boxes 33. The input end of the hydraulic rods 31 is electrically connected to the output end of the external PLC controller. Core making is performed by setting the core-making assembly 3.
[0023] The working principle of the safety protection device for core-making machine production provided by this utility model is as follows: When the core-making process is completed and the box needs to be opened, the external PLC controller controls the hydraulic rod 31 to retract, driving the two core boxes 33 to separate to the left and right. When the core box 33 moves, its lower side will squeeze the extrusion head 45. After the extrusion, the slide rod 42 moves, driving the connecting head 43 to move downward and press against the first pressure sensor 52 below. The external PLC controller receives the signal from the first pressure sensor 52, determines that the core box 33 has been separated, and then controls the electric extension of the protective component 6. The telescopic rod 61 extends, and the electric telescopic rod 61 pushes the limiting strip 62 and the pads 63 and 64 fixed on it upward, inserting them between the two separating core boxes 33. The two pads 64 finally fit against the sides of the core box 33, forming a physical barrier. At the same time, the limiting strip 62 moves upward so that the second pressure sensor 65 on its upper side fits against the lower side of the mounting frame 1. The external PLC controller receives the pressure signal from the second pressure sensor 65 and confirms that the protection is in place. At this time, the external PLC controller controls the electromagnet 78 in the fixing assembly 7 to de-energize and release the metal plate. Under the restoring force of the second spring 75, the guide rod 73 drives the slide bar 76 and support frame 77 to move along the slide groove 71 to the outside of the mounting frame 1, so that the two support frames 77 contact the limiting bar 62, thereby supporting it. Then, the operator can safely perform core removal, cleaning and other operations under the protection of the pad 63. After the operation is completed, the electromagnet 78 is energized to attract the metal plate 74. After attraction, the two support frames 77 move away from the limiting bar 62. Then, the external PLC controller controls the electric telescopic rod 61 to retract, driving the limiting bar 62, pad 63 and... The pad 64 moves downward, completely exiting the area between the two core boxes 33. After the protective component 6 is fully reset, the external PLC controller controls the hydraulic rod 31 to extend, pushing the two core boxes 33 to close. After the core box 33 is closed, its lower side will move away from the extrusion head 45. At this time, the slide rod 42 moves upward under the action of the first spring 44, causing the connector 43 to rise and disengage from the pressure of the first pressure sensor 52. The external PLC controller receives the status change signal of the first pressure sensor 52, confirming that the core box 33 has been closed in place, and the equipment can proceed to the next core making cycle.
[0024] It is worth noting that the external PLC controller disclosed in the above embodiments is specifically a Siemens S7-200. The hydraulic rod 31, electric telescopic rod 61, first pressure sensor 52 and second pressure sensor 65 can be freely configured according to the actual application scenario. The external PLC controller controls the operation of the hydraulic rod 31 and electric telescopic rod 61 using methods commonly used in the prior art.
[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A safety guard for a coremaker production machine, characterised in that: Includes mounting frame (1) and core assembly (3); Mounting frame (1): A bracket (2) is fixed on the lower side. A protective component (6) is installed on the lower side inside the bracket (2). Fixing components (7) are installed on the front and rear sides inside the mounting frame (1). Two corresponding squeezing components (4) are installed on the left and right ends of the upper side of the mounting frame (1). Two corresponding sensing components (5) are installed on the left and right ends of the lower side of the mounting frame (1). The squeezing components (4) and sensing components (5) cooperate with each other. Core-making assembly (3): includes hydraulic rods (31), connecting plate (32) and core box (33). Two corresponding core boxes (33) are provided on the left and right ends of the upper side of the mounting frame (1). Two corresponding hydraulic rods (31) are installed on the left and right sides inside the mounting frame (1). The telescopic arms of the four hydraulic rods (31) are fixed on the sides of the two core boxes (33). The two core boxes (33) are connected to the two extrusion assemblies (4) respectively. The protective assembly (6) is located between the two core boxes (33). The input end of the hydraulic rod (31) is electrically connected to the output end of the external PLC controller.
2. A safety guard for a coremaking machine as defined in claim 1, characterized in that: The extrusion assembly (4) includes a fixing ring (41), a slide rod (42), a connector (43), a first spring (44), and an extrusion head (45). Two corresponding sliding holes are opened at the left and right ends of the upper side of the mounting frame (1). The fixing ring (41) is fixed inside the sliding hole. The slide rod (42) is slidably connected inside the fixing ring (41). The connector (43) is fixed at the lower end of the slide rod (42). The first spring (44) is sleeved on the circumferential surface of the slide rod (42). The lower end of the first spring (44) is fixed to the upper end of the connector (43). The upper end of the first spring (44) is fixed to the lower end of the fixing ring (41). The extrusion head (45) is fixed at the upper end of the slide rod (42). The lower side of the core box (33) is respectively attached to the two extrusion heads (45).
3. A safety guard for a coremaking machine as defined in claim 2, wherein: The sensing component (5) includes a mounting bracket (51) and a first pressure sensor (52). Two corresponding mounting brackets (51) are fixed at the left and right ends of the lower side of the mounting frame (1). A groove is provided on the lower side inside the mounting bracket (51). The first pressure sensor (52) is installed inside the groove. The first pressure sensor (52) is in contact with the corresponding connector (43). The first pressure sensor (52) is bidirectionally electrically connected to the external PLC controller.
4. A safety guard for a coremaking machine as defined in claim 1, wherein: The protective component (6) includes an electric telescopic rod (61), a limiting strip (62), a pad (63), a pad plate (64), and a second pressure sensor (65). An electric telescopic rod (61) is installed on the upper side of the bracket (2). A limiting strip (62) is fixed on the telescopic arm of the electric telescopic rod (61). The limiting strip (62) is in contact with the lower side of the mounting frame (1). A pad (63) is fixed on the upper side of the limiting strip (62). Two corresponding pad plates (64) are fixed on the left and right sides of the pad (63). The two pad plates (64) are in contact with the sides of the two core boxes (33) respectively. Two corresponding mounting holes are opened on the upper side of the limiting strip (62). A second pressure sensor (65) is installed inside the mounting holes. The second pressure sensor (65) is in contact with the lower side of the mounting frame (1). The second pressure sensor (65) is bidirectionally electrically connected to an external PLC controller.
5. A safety guard for a coremaking machine as defined in claim 4, wherein: The fixing component (7) includes a slide groove (71), a slide bar (76) and a support frame (77). The limiting bar (62) is provided with two corresponding support frames (77). The slide bar (76) is fixed on the side of the support frame (77). Two corresponding slide grooves (71) are opened on the front and rear sides inside the mounting frame (1). The slide bar (76) is slidably connected to the inside of the corresponding slide groove (71).
6. A safety guard for a coremaking machine as defined in claim 5, wherein: The fixing assembly (7) also includes a fixing frame (72), a guide rod (73), a metal plate (74), a second spring (75), and an electromagnet (78). The fixing frame (72) is fixed inside the slide groove (71). The guide rod (73) is slidably connected inside the fixing frame (72). The guide rod (73) is fixed on the side of the corresponding slide bar (76). The other end of the guide rod (73) is fixed with a metal plate (74). An electromagnet (78) is installed inside the slide groove (71). The electromagnet (78) and the metal plate (74) correspond to each other. The second spring (75) is sleeved on the circumferential surface of the guide rod (73). One end of the second spring (75) is fixed on the side of the slide bar (76), and the other end of the second spring (75) is fixed on the side of the fixing frame (72). The input end of the electromagnet (78) is electrically connected to the output end of an external PLC controller.