Injection mold anti-collision mold system with oil cylinder failure triggering emergency stop and control method

Abstract

The application provides an injection mold anti-collision mold system with oil cylinder failure triggering emergency stop and a control method, relates to the technical field of injection molds, and comprises an ejection device, a detection device and a control device. The ejection device comprises an ejection driving assembly and a ejector plate connected with the ejection driving assembly, and the ejection driving assembly can drive the ejector plate to perform ejection action and reset action. The detection device comprises a reset detection assembly, an unbalanced load detection assembly and an anti-collision detection assembly, and the ejection driving assembly, the reset detection assembly, the unbalanced load detection assembly and the anti-collision detection assembly are electrically connected with the control device. The detection device with the reset detection assembly, the unbalanced load detection assembly and the anti-collision detection assembly constitutes a multi-in-one monitoring system, which can not only realize targeted monitoring of the ejection mechanism in all working conditions, but also can instantly stop protection when the detection signal is abnormal, avoid production line shutdown caused by abnormal failure, and effectively ensure the continuity and stability of production operation.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an anti-collision mold system and control method for injection molds that triggers emergency stop due to cylinder failure. Background Technology

[0002] In injection molding production, the ejection mechanism of the mold generally relies on hydraulic cylinders to drive the ejector plate to complete the ejection and resetting of the product. It is the core structure for realizing automated demolding of injection molded products and ensuring continuous operation of the production line. However, under long-term, high-frequency production conditions, the hydraulic cylinders driving the ejector plate are prone to various failures such as leakage, piston jamming, oil circuit blockage, and oil interruption. These failures directly disrupt the force and motion balance of the ejector plate, causing asynchronous displacement on both sides of the ejector plate, resulting in overall skewness and misalignment. When the ejector plate is in a skewed state, the ejector pins cannot be fully reset or there may be excessive ejection on one side. During mold closing, the protruding or offset ejector pins will directly and rigidly collide with and impact the mold cavity. This can cause minor scratches and chipping on the mold cavity surface, or bending and breaking of the ejector pins, or even scrapping the entire mold. This not only significantly increases the material and labor costs of mold repair and replacement, but also causes emergency shutdowns and production line stoppages due to mold failures, seriously affecting the injection molding production cycle and causing significant production losses and economic losses.

[0003] Currently, existing anti-collision protection structures for injection molds have significant technical defects, lacking targeted detection and protection systems for ejection mechanism cylinder failure, ejector plate misalignment, and abnormal ejection and reset. Traditional molds rely solely on a single limit switch to detect the ejector plate reset status, only able to determine whether the reset is complete, and cannot monitor abnormal conditions such as lateral displacement deviation and excessive ejection stroke during ejector plate operation in real time. When cylinder failure causes slight misalignment, incomplete reset, or excessive ejection stroke, the single detection structure is prone to signal misinterpretation and missed detection, failing to capture latent faults in time. Furthermore, traditional protection is mostly a post-installed mechanical hard limit protection, only able to passively mitigate damage after a collision is imminent or has already occurred, unable to proactively identify problems and intervene in protection during the early stages of cylinder failure or abnormal ejector plate operation.

[0004] Therefore, there is an urgent need to invent an anti-collision system for injection molds that can specifically monitor for abnormal ejection mechanism failures and trigger active emergency stop protection. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-collision mold system and control method for injection molds that triggers emergency stop due to cylinder failure, in order to solve the technical problem in the prior art where injection molds are easily damaged because they cannot detect abnormal movement of the ejection mechanism; the preferred technical solutions provided by this invention can produce many technical effects, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides an anti-collision system for injection molds that triggers emergency stop due to cylinder failure. The system includes an ejection device, a detection device, and a control device. The ejection device comprises an ejection drive assembly and an ejector plate connected to the ejection drive assembly. The ejection drive assembly drives the ejector plate to perform ejection and reset actions. The detection device includes a reset detection assembly, an off-center load detection assembly, and an anti-collision detection assembly. The reset detection assembly detects the reset position of the ejector plate and outputs a reset position signal. The off-center load detection assembly detects the displacement deviation on both sides of the ejector plate and outputs an off-center load signal. The anti-collision detection assembly detects whether the ejector plate exceeds a preset upper limit of the ejection stroke and outputs an overtravel limit signal. The ejection drive assembly, the reset detection assembly, the off-center load detection assembly, and the anti-collision detection assembly are all electrically connected to the control device. The control device is configured to stop the ejection drive assembly when it receives an abnormal reset position signal, an off-center load signal, or an overtravel limit signal.

[0008] Preferably, the injection mold anti-collision system for emergency stop triggered by cylinder failure includes a support device, and the ejection drive assembly includes a hydraulic telescopic assembly, which is fixedly mounted on the support device and connected to the ejector plate.

[0009] Preferably, the support device includes vertical arms and a crossbeam, wherein: the number of vertical arms is set to two, the two vertical arms are arranged opposite to each other, and the two vertical arms are connected by the crossbeam; the ejector plate and the hydraulic telescopic assembly are arranged between the two vertical arms.

[0010] Preferably, the cylinder of the hydraulic telescopic assembly is fixedly mounted on the ejector plate, and the telescopic rod of the hydraulic telescopic assembly is fixedly connected to the crossbeam.

[0011] Preferably, the detection device includes a hydraulic detection component, which is used to detect the inlet oil pressure and the outlet oil pressure, and output the inlet oil pressure signal and the outlet oil pressure signal; the hydraulic detection component is electrically connected to the control device; the hydraulic detection component includes two hydraulic sensors respectively disposed at the oil inlet and oil outlet of the hydraulic telescopic component.

[0012] Preferably, the number of hydraulic telescopic components is set to two, and the two hydraulic telescopic components are respectively located at both ends of the ejector plate; each hydraulic telescopic component is correspondingly provided with the reset detection component, the off-center load detection component and the anti-collision detection component.

[0013] Preferably, the reset detection assembly includes a reset limit switch, which is disposed on the crossbeam.

[0014] Preferably, the off-center load detection assembly includes two contact displacement detection assemblies respectively disposed on both sides of the ejector plate; the contact displacement detection assembly includes a contact position sensor and a sensing plate, the contact position sensor is fixedly disposed on the ejector plate, the sensing plate is fixedly disposed on the corresponding vertical arm, and the detection end of the contact position sensor is in contact with the corresponding sensing plate.

[0015] Preferably, the anti-collision detection component includes a miniature pressure sensor built into an anti-collision limiting block, the anti-collision limiting block being disposed on the side of the ejector plate away from the crossbeam.

[0016] This invention provides a control method for an injection mold anti-collision system based on emergency stop triggered by the failure of any of the aforementioned hydraulic cylinders, comprising at least the following steps: Obtain the reset position signal of the ejector plate and determine whether the reset position signal indicates that the ejector plate has reached the preset reset position; Acquire the off-center load signal of the ejector plate during the ejection process, and determine whether the off-center load signal indicates that the displacement deviation on both sides of the ejector plate exceeds the preset allowable deviation value. Obtain the overtravel limit signal of the ejector plate, and determine whether the overtravel limit signal indicates that the ejection travel of the ejector plate exceeds the preset travel limit. When it is determined that the reset position signal indicates that the preset reset position has not been reached, or the off-center load signal indicates that the preset allowable deviation value has been exceeded, or the overtravel limit signal indicates that the preset travel limit has been exceeded, the ejection drive component is controlled to stop operating.

[0017] Preferably, the ejection drive assembly includes a hydraulic telescopic assembly for driving the ejector plate to perform ejection and resetting actions; the control method further includes: Acquire the inlet pressure signal and outlet pressure signal of the hydraulic telescopic component, and determine whether the inlet pressure signal and the outlet pressure signal indicate that the difference between the inlet pressure and the outlet pressure of the hydraulic telescopic component exceeds the preset allowable pressure difference range, or whether any pressure value exceeds the preset pressure threshold. When the inlet pressure signal or the outlet pressure signal is determined to indicate that it exceeds the preset allowable differential pressure range or exceeds the preset pressure threshold, the ejector drive assembly is controlled to stop operating.

[0018] The anti-collision mold system and control method for injection molds that triggers emergency stop due to cylinder failure provided by this invention have at least the following beneficial effects: First, achieve targeted monitoring of the entire operating condition of the top-out mechanism.

[0019] This invention constructs a multi-dimensional monitoring system integrating reset position detection, displacement off-center load detection, and ejection stroke upper limit detection. It can specifically capture various abnormal working conditions caused by cylinder failures such as leakage, jamming, and oil cut-off, including incomplete ejector plate reset, uneven displacement on both sides, skewness, and over-stroke ejection. It solves the problems of existing technologies, such as the lack of dedicated cylinder failure detection logic, low fault identification accuracy, and high rate of missed and false judgments, and achieves comprehensive and accurate identification of ejection and reset abnormal faults.

[0020] Second, it enables immediate emergency stop protection, avoiding the risk of mold collision from the source and preventing mold damage.

[0021] This invention, through a control device linking various detection components, can receive various abnormal signals in real time, such as abnormal reset position, ejector plate off-center load, and excessive ejection stroke. Once an abnormal ejection or reset condition caused by cylinder failure is detected, the ejection drive component can be immediately controlled to stop operation, cutting off the ejection power in advance and terminating the abnormal ejection and reset actions. Compared with traditional mechanical passive damage prevention structures, this invention can actively intervene and prevent damage before a mold collision accident occurs, avoiding problems such as skewed ejector pins hitting or impacting the mold cavity, and fundamentally preventing safety accidents such as mold damage and ejector pin breakage.

[0022] Third, reduce production and maintenance costs and ensure the continuity of injection molding production.

[0023] This invention can quickly identify and promptly protect against ejection mechanism abnormalities caused by cylinder failure, effectively preventing equipment damage problems such as mold cavity breakage, ejector pin breakage, and mold scrapping, and significantly reducing the cost of mold repair and replacement; at the same time, it effectively eliminates production line shutdowns and production stoppages caused by ejector pin collision failures, stabilizes the injection molding production cycle, ensures the continuity and stability of production operations, and improves overall production efficiency and economic benefits. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural block diagram of the anti-collision mold system of the present invention; Figure 2 This is a schematic diagram of the ejection device of the present invention in the reset state from one perspective; Figure 3This is a schematic diagram of the ejection device of the present invention in the reset state from another perspective; Figure 4 This is a schematic diagram of the structure of the ejection device of the present invention in the ejection state from one perspective; Figure 5 This is an assembly diagram of the reset detection component, the off-center load detection component, and the anti-collision detection component of the present invention; Figure 6 This is the present invention. Figure 4 Enlarged view of part A; Figure 7 This is the present invention. Figure 4 Enlarged view of part B; Figure 8 This is the present invention. Figure 5 Enlarged view of part C; Figure 9 This is a logic block diagram of the control method of the present invention.

[0026] Figure Labels 1. Ejection device; 11. Ejection drive assembly; 111. Hydraulic telescopic assembly; 12. Ejector plate; 121. Third mounting slot; 2. Detection device; 21. Reset detection assembly; 211. Reset limit switch; 22. Off-center load detection assembly; 221. Contact position sensor; 222. Sensing plate; 23. Anti-collision detection assembly; 231. Anti-collision limit block; 232. Miniature pressure sensor; 24. Hydraulic detection assembly; 3. Control device; 4. Support device; 41. Vertical arm; 411. Second mounting slot; 42. Crossbeam; 421. First mounting slot. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] Example 1: This invention provides an anti-collision mold system for injection molds that triggers an emergency stop due to cylinder failure, as described in the reference. Figure 1 As shown, the injection mold anti-collision system that triggers emergency stop due to cylinder failure includes an ejection device 1, a detection device 2, and a control device 3.

[0029] The ejection device 1 includes an ejection drive assembly 11 and an ejector plate 12. The ejection drive assembly 11 is connected to the ejector plate 12 and can drive the ejector plate 12 to perform ejection and resetting actions.

[0030] The detection device 2 includes a reset detection component 21, an off-center load detection component 22, and an anti-collision detection component 23. The ejection drive component 11, the reset detection component 21, the off-center load detection component 22, and the anti-collision detection component 23 are all electrically connected to the control device 3.

[0031] During operation, the ejector drive assembly 11 drives the ejector plate 12 to perform ejection and reset actions.

[0032] During this process, the reset detection component 21 detects the reset position of the ejector plate 12 and transmits the reset position signal to the control device 3; the off-center load detection component 22 detects the displacement deviation on both sides of the ejector plate 12 and transmits the off-center load signal to the control device 3; and the anti-collision detection component 23 detects whether the ejector plate 12 exceeds the preset ejection stroke limit and transmits the over-stroke limit signal to the control device 3.

[0033] When the control device 3 receives an abnormal reset position signal, off-center load signal, or overtravel limit signal, it controls the ejection drive assembly 11 to stop operating.

[0034] The present invention forms a multi-dimensional monitoring system by means of a detection device 2 having a reset detection component 21, an off-center load detection component 22 and an anti-collision detection component 23. It can not only realize targeted monitoring of the ejection mechanism under all working conditions, but also provide immediate emergency stop protection when the detection signal is abnormal, so as to avoid production line shutdown due to abnormal failure and effectively ensure the continuity and stability of production operations.

[0035] As an optional implementation method, such as Figure 2 As shown, the injection mold anti-collision system that triggers emergency stop due to cylinder failure includes a support device 4. The ejection drive assembly 11 is a hydraulic drive assembly, including a hydraulic telescopic assembly 111 and a solenoid valve that controls the hydraulic telescopic assembly 111. The solenoid valve is electrically connected to the control device 3. The hydraulic telescopic assembly 111 is specifically a cylinder, which is fixedly mounted on the support device 4 and connected to the ejector plate 12.

[0036] The support device 4 is the support carrier of the hydraulic telescopic assembly 111, which can stably support the hydraulic telescopic assembly 111 and provide a foundation for the ejection device 1 to perform the ejection action.

[0037] The ejection drive assembly 11 adopts a hydraulic telescopic assembly, which is suitable for heavy load operation, while the thrust process is stable and the pressure and stroke are controllable.

[0038] As an optional implementation method, such as Figure 2 and Figure 3As shown, the support device 4 adopts a gantry frame, including vertical arms 41 and horizontal beams 42. The number of vertical arms 41 is set to two, and the two vertical arms 41 are arranged opposite each other and connected by the horizontal beams 42. The ejector plate 12 and the hydraulic telescopic assembly 111 are arranged between the two vertical arms 41.

[0039] The gantry-type support structure has advantages such as high structural strength and good symmetry. It can not only effectively ensure the stability of the hydraulic telescopic component 111 support, but also make the overall structure more compact while facilitating the maintenance of each component in the later stage.

[0040] As an optional implementation method, such as Figures 2 to 4 As shown, the cylinder of the hydraulic telescopic assembly 111 is fixedly mounted on the ejector plate 12, and the telescopic rod of the hydraulic telescopic assembly 111 is fixedly connected to the crossbeam 42.

[0041] During the ejection action, the telescopic rod of the hydraulic telescopic assembly 111 extends. Since the telescopic rod is fixedly connected to the crossbeam 42, the telescopic rod is a relatively stationary component, while the cylinder is a relatively moving component, which drives the ejector plate 12 to perform the ejection action.

[0042] The inverted installation structure, unlike the traditional hydraulic cylinder installation method, eliminates the need to reserve installation space for the hydraulic telescopic component 111 between the ejector plate 12 and the crossbeam 42, making the structure more compact.

[0043] Specifically, the crossbeam 42 is provided with an installation groove, the installation end of the telescopic rod is provided with an installation column, the installation column is provided with an annular groove along the circumference, and the groove edge of the installation groove is clamped in the annular groove.

[0044] As an optional implementation, the detection device 2 includes a hydraulic detection component 24, which is electrically connected to the control device 3 and is used to detect the inlet pressure and outlet pressure, and can transmit the inlet pressure signal and outlet pressure signal to the control device 3.

[0045] The hydraulic detection assembly 24 includes two hydraulic sensors respectively disposed at the oil inlet and oil outlet of the hydraulic telescopic assembly 111.

[0046] The two hydraulic sensors can be built into the inside of the cylinder, or they can be externally installed on the oil inlet and the outlet, respectively.

[0047] During operation, when the control device 3 detects abnormal oil inlet pressure signal or abnormal oil outlet pressure signal, it controls the ejector drive assembly 11 to stop operating.

[0048] Hydraulic pressure detection can directly trace internal cylinder failures, enabling early detection of hidden faults such as internal and external leakage, oil circuit blockage, insufficient oil supply, and oil cut-off. Even before obvious abnormal displacement or misalignment of the ejector plate, abnormal pressure data can identify potential cylinder failures, allowing for early fault prediction and further improving the system's comprehensiveness and accuracy in identifying cylinder failures.

[0049] As an optional implementation, the number of hydraulic telescopic components 111 is set to two, with the two hydraulic telescopic components 111 located at both ends of the ejector plate 12 respectively.

[0050] The dual-cylinder symmetrical drive structure can achieve uniform force and synchronous power at both ends of the ejector plate, which can improve the smoothness of ejection and resetting actions.

[0051] Each hydraulic telescopic component 111 is equipped with a reset detection component 21, an off-center load detection component 22, and an anti-collision detection component 23.

[0052] The layout of one-to-one independent detection components allows for independent monitoring of the operating status of the hydraulic telescopic components on both sides, as well as the displacement and stroke status at both ends of the ejector plate. This enables precise location of faults such as single-sided cylinder failure and abnormal movement, solving the problem of overall detection being unable to distinguish single-sided faults and having ambiguous fault location. Once problems such as cylinder jamming, abnormal pressure, or displacement deviation occur on one side, they can be identified individually and an emergency stop can be triggered. This results in higher detection accuracy and stronger fault targeting, adapting to various abnormal operating conditions caused by single-sided cylinder failure.

[0053] As an optional implementation, the reset detection assembly 21 includes a reset limit switch 211, which is disposed on the crossbeam 42.

[0054] Specifically, such as Figure 4 and Figure 6 As shown, the two ends of the crossbeam 42 are provided with first mounting grooves 421. The reset limit switch 211 is installed in the first mounting groove 421 by threaded fasteners. The trigger end of the reset limit switch 211 faces the ejector plate 12.

[0055] As an optional implementation, the off-center load detection assembly 22 includes two contact displacement detection assemblies, which are respectively disposed on both sides of the ejector plate 12.

[0056] The contact displacement detection assembly includes a contact position sensor 221 and a sensing plate 222. The contact position sensor 221 is fixedly mounted on the ejector plate 12, and the sensing plate 222 is fixedly mounted on the corresponding vertical arm 41. The detection end of the contact position sensor 221 is in contact with the corresponding sensing plate 222.

[0057] like Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the vertical arm 41 has a second mounting groove 411 on the side facing the ejector plate 12. The sensing plate 222 is fixedly installed in the second mounting groove 411. The ejector plate 12 has a third mounting groove 121 corresponding to the position of the sensing plate 222. The contact position sensor 221 is fixedly installed in the third mounting groove 121. The sensing plate 222 has a plurality of sensing teeth evenly arranged along the moving direction of the ejector plate 12. A sensing groove is formed between two adjacent sensing teeth. The detection end of the contact position sensor 221 can move and be inserted into any of the sensing grooves to obtain the moving position of the corresponding side of the ejector plate 12.

[0058] As an optional implementation, the anti-collision detection component 23 includes a miniature pressure sensor 232 built into the anti-collision limiting block 231, which is located on the side of the ejector plate 12 away from the crossbeam 42.

[0059] like Figure 4 As shown, the anti-collision limit block 231 is fixedly mounted on the ejector plate 12 by a threaded connector. During operation, when the anti-collision limit block 231 contacts the inner mold, the micro pressure sensor 232 can capture the pressure signal and thus determine the overtravel fault.

[0060] As an optional implementation, the control device 3 adopts a PLC controller, and the ejector plate 12 includes two plates arranged in layers.

[0061] Example 2 Example 2 is based on Example 1: like Figure 9 As shown, the present invention provides a control method for an injection mold anti-collision system based on the hydraulic cylinder failure triggering an emergency stop, comprising at least the following steps: Obtain the reset position signal of the ejector plate 12 and determine whether the reset position signal indicates that the ejector plate 12 has reached the preset reset position; The off-center load signal of the ejector plate 12 during the ejection process is obtained, and it is determined whether the off-center load signal indicates that the displacement deviation on both sides of the ejector plate 12 exceeds the preset allowable deviation value. Obtain the overtravel limit signal of the ejector plate 12, and determine whether the overtravel limit signal indicates that the ejection stroke of the ejector plate 12 exceeds the preset upper limit of the stroke; When it is determined that the reset position signal has not reached the preset reset position, or the off-center load signal exceeds the preset allowable deviation value, or the overtravel limit signal exceeds the preset travel limit, the ejection drive assembly 11 is controlled to stop operating.

[0062] This invention constructs a comprehensive, multi-dimensional anomaly judgment logic by collecting reset position signals, ejector plate off-center load signals, and overtravel limit signals. As long as any dimension is abnormal, the ejector drive component 11 can be immediately triggered to stop. The control logic is simple, the response is rapid, and the protection is comprehensive. It can quickly cut off the power and terminate the abnormal action at the moment the fault occurs. From the control logic level, it ensures the timeliness and reliability of mold anti-collision protection and completely solves the problems of single detection dimension, delayed fault response, and large protection blind spots in traditional control methods.

[0063] As an optional implementation, the ejection drive assembly 11 includes a hydraulic telescopic assembly 111 for driving the ejector plate 12 to perform ejection and resetting actions; the control method further includes: Acquire the inlet pressure signal and outlet pressure signal of the hydraulic telescopic assembly 111, and determine whether the inlet pressure signal and the outlet pressure signal indicate that the difference between the inlet pressure and the outlet pressure of the hydraulic telescopic assembly 111 exceeds the preset allowable pressure difference range, or whether any pressure value exceeds the preset pressure threshold. When the inlet pressure signal or the outlet pressure signal is determined to indicate that it exceeds the preset allowable differential pressure range or exceeds the preset pressure threshold, the ejector drive assembly 11 is controlled to stop operating.

[0064] The logic for judging hydraulic pressure parameters is supplemented. In the actual operation process, when the hydraulic system is abnormal but the ejector plate 12 has not yet shown obvious abnormal movement in the early stage of the fault, the emergency stop warning can be triggered by the abnormal pressure parameters, so as to realize the prevention and control of faults in advance.

[0065] This control method upgrades post-event motion protection to full-cycle protection that includes pre-event fault prediction and in-event anomaly intervention, further improving the system's accuracy in identifying cylinder failures and its proactive protection capabilities, minimizing mold collision damage, and reducing production downtime losses.

[0066] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", "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 application 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 application.

[0067] 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 at least one of that feature. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0069] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A hydraulic cylinder failure-triggered emergency stop anti-collision system for injection molds, characterized in that, It includes an ejection device, a detection device, and a control device, wherein: The ejection device includes an ejection drive assembly and an ejector plate connected to the ejection drive assembly. The ejection drive assembly can drive the ejector plate to perform ejection and reset actions. The detection device includes a reset detection component, an off-center load detection component, and an anti-collision detection component. The reset detection component is used to detect the reset position of the ejector plate and output a reset position signal. The off-center load detection component is used to detect the displacement deviation on both sides of the ejector plate and output an off-center load signal. The anti-collision detection component is used to detect whether the ejector plate exceeds the preset ejection stroke limit and output an over-stroke limit signal. The ejection drive assembly, the reset detection assembly, the off-center load detection assembly, and the anti-collision detection assembly are all electrically connected to the control device. The control device is configured to control the ejection drive assembly to stop operating when it receives an abnormal reset position signal, off-center load signal, or overtravel limit signal.

2. The injection mold anti-collision system for emergency stop triggered by cylinder failure as described in claim 1, characterized in that, The injection mold anti-collision system for emergency stop triggered by cylinder failure includes a support device, and the ejection drive assembly includes a hydraulic telescopic assembly, which is fixedly mounted on the support device and connected to the ejector plate.

3. The injection mold anti-collision system for emergency stop triggered by cylinder failure as described in claim 2, characterized in that, The support device includes vertical arms and a horizontal beam. The number of vertical arms is set to two, the two vertical arms are arranged opposite to each other, and the two vertical arms are connected by the horizontal beam. The cylinder of the hydraulic telescopic assembly is fixedly mounted on the ejector plate, and the telescopic rod of the hydraulic telescopic assembly is fixedly connected to the crossbeam.

4. The injection mold anti-collision system for emergency stop triggered by cylinder failure as described in claim 2, characterized in that, The detection device includes a hydraulic detection component, which is used to detect the inlet oil pressure and the outlet oil pressure, and output the inlet oil pressure signal and the outlet oil pressure signal. The hydraulic detection component is electrically connected to the control device; The hydraulic detection component includes two hydraulic sensors respectively installed at the oil inlet and oil outlet of the hydraulic telescopic component.

5. The injection mold anti-collision system for emergency stop triggered by cylinder failure according to claim 4, characterized in that, The number of hydraulic telescopic components is set to two, and the two hydraulic telescopic components are respectively located at both ends of the ejector plate; Each of the hydraulic telescopic components is correspondingly equipped with the reset detection component, the off-center load detection component, and the anti-collision detection component.

6. The injection mold anti-collision system for emergency stop triggered by cylinder failure according to claim 3, characterized in that, The reset detection component includes a reset limit switch, which is disposed on the crossbeam.

7. The injection mold anti-collision system for emergency stop triggered by cylinder failure according to claim 3, characterized in that, The off-center load detection assembly includes two contact displacement detection assemblies respectively disposed on both sides of the ejector plate. The contact displacement detection assembly includes a contact position sensor and a sensing plate. The contact position sensor is fixedly mounted on the ejector plate, and the sensing plate is fixedly mounted on the corresponding vertical arm. The detection end of the contact position sensor is in contact with the corresponding sensing plate.

8. The injection mold anti-collision system for emergency stop triggered by cylinder failure according to claim 3, characterized in that, The anti-collision detection component includes a miniature pressure sensor built into an anti-collision limiting block, which is located on the side of the ejector plate away from the crossbeam.

9. A control method for an injection mold anti-collision system based on the hydraulic cylinder failure-triggered emergency stop according to any one of claims 1 to 8, characterized in that, At least the following steps are included: Obtain the reset position signal of the ejector plate and determine whether the reset position signal indicates that the ejector plate has reached the preset reset position; Acquire the off-center load signal of the ejector plate during the ejection process, and determine whether the off-center load signal indicates that the displacement deviation on both sides of the ejector plate exceeds the preset allowable deviation value. Obtain the overtravel limit signal of the ejector plate, and determine whether the overtravel limit signal indicates that the ejection travel of the ejector plate exceeds the preset travel limit. When it is determined that the reset position signal indicates that the preset reset position has not been reached, or the off-center load signal indicates that the preset allowable deviation value has been exceeded, or the overtravel limit signal indicates that the preset travel limit has been exceeded, the ejection drive component is controlled to stop operating.

10. The control method according to claim 9, characterized in that, The ejection drive assembly includes a hydraulic telescopic assembly for driving the ejector plate to perform ejection and resetting actions; the control method further includes: Acquire the inlet pressure signal and outlet pressure signal of the hydraulic telescopic component, and determine whether the inlet pressure signal and the outlet pressure signal indicate that the difference between the inlet pressure and the outlet pressure of the hydraulic telescopic component exceeds the preset allowable pressure difference range, or whether any pressure value exceeds the preset pressure threshold. When the inlet pressure signal or the outlet pressure signal is determined to indicate that it exceeds the preset allowable differential pressure range or exceeds the preset pressure threshold, the ejector drive assembly is controlled to stop operating.

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