Intelligent detection method for state of electromagnetic reversing valve of injection molding machine

Abstract

This invention discloses an intelligent detection method for the status of an electromagnetic reversing valve in an injection molding machine, comprising the following steps: Step 1: Install the corresponding electromagnetic valve of the injection molding machine at the corresponding workstation, and install an injection electronic ruler, a mold clamping electronic ruler, and an ejector pin electronic ruler at the corresponding electromagnetic valve, while integrating an IO detection device on the injection molding machine computer; Step 2: Detect the correct wiring of the electromagnetic valve coil using the IO detection device through signal transmission between the injection molding machine computer and the electromagnetic valve; Step 3: Detect whether the electromagnetic valve is stuck by using the positional relationship between the corresponding installed electronic ruler and the corresponding detected electromagnetic valve; Step 4: The injection molding machine computer collects the motion trajectory curve of the electromagnetic valve control terminal through sensors, and detects the smoothness of the electromagnetic valve core switching by comparing it with a reference curve; This invention achieves high-performance electromagnetic valve fault diagnosis with existing machine configurations without additional hardware investment.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve detection technology for injection molding machines, and specifically to an intelligent detection method for the status of solenoid directional valves used in injection molding machines. Background Technology

[0002] As a common hydraulic component in injection molding machines, the working status of solenoid valves directly affects the machine's operation and control performance. In actual use, common solenoid valve malfunctions include valve jamming, valve core failure, and solenoid coil circuit failure. Currently, the industry lacks a method for real-time monitoring of injection molding machine valve status; troubleshooting is typically done only after machine malfunctions occur. This troubleshooting process is time-consuming and labor-intensive, and it does not provide effective preventative maintenance. Summary of the Invention

[0003] The purpose of this invention is to provide an intelligent detection method for the status of electromagnetic directional valves in injection molding machines. This method monitors the working status of electromagnetic valves on the entire injection molding machine in real time, enabling rapid location of faulty electromagnetic valves and analysis of the causes of faulty valves. This improves the overall intelligence level of the machine and significantly reduces the service intensity of after-sales maintenance personnel, thereby increasing service efficiency.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A method for intelligent detection of the status of an electromagnetic directional valve for an injection molding machine includes the following steps:

[0006] Step 1: Install the corresponding solenoid valve of the injection molding machine to the corresponding station, and install the injection electronic ruler, mold clamping electronic ruler and ejector pin electronic ruler at the corresponding solenoid valve. At the same time, integrate the IO detection device on the injection molding machine computer.

[0007] Step 2: Through signal transmission between the injection molding machine computer and the solenoid valve, the correctness of the solenoid valve coil wiring is detected using IO detection equipment;

[0008] Step 3: By measuring the positional relationship between the corresponding installed electronic ruler and the corresponding solenoid valve, check whether the solenoid valve is stuck.

[0009] Step 4: The injection molding machine computer collects the motion trajectory curve of the solenoid valve control terminal through sensors, and compares it with the reference curve to detect the smoothness of the solenoid valve core switching.

[0010] As a further aspect of the present invention: during the detection of the correct wiring of the solenoid valve coil, the injection molding machine computer outputs a digital DO signal to the solenoid valve. When the solenoid valve is normally energized, it feeds back a digital DI signal to the injection molding machine computer. The IO detection device detects the digital signal to realize the closed-loop confirmation of the solenoid valve A coil circuit.

[0011] As a further aspect of the present invention: the injection electronic ruler, the mold clamping electronic ruler, and the ejector pin electronic ruler operate in the same way.

[0012] As a further aspect of the present invention: when performing valve jamming detection on the solenoid valve corresponding to the glue injection electronic ruler, under normal circumstances, when the glue injection action is performed, the glue injection solenoid valve A is energized, and the position of the glue injection electronic ruler gradually decreases; when the release action is performed, the position of the glue injection electronic ruler gradually increases; under abnormal circumstances, when performing the glue injection or release action, if the glue injection cylinder pressure is normal, the position of the glue injection electronic ruler gradually increases, indicating that the glue injection solenoid valve is in a valve jamming state at this time.

[0013] As a further aspect of the present invention: the specific process for detecting the smoothness of the solenoid valve core switching in step four is as follows: the solenoid valve is controlled in both directions, and the position, speed, and time curves under the movement of the control terminal are detected; the baseline curve is compared and analyzed with the real-time acquired curve to obtain the conclusion on the smoothness of the solenoid valve core switching.

[0014] As a further aspect of the present invention: the computer of the injection molding machine is equipped with a complete simulation model of the injection molding machine, and the corresponding solenoid valves on the simulation model correspond to the solenoid valves on the injection molding machine.

[0015] As a further aspect of the present invention, the computer of the injection molding machine also stores data information of the solenoid valves of the entire injection molding machine.

[0016] As a further aspect of the present invention: the injection molding machine is equipped with a corresponding display screen for displaying the specific location of the faulty solenoid valve and the corresponding related information.

[0017] The beneficial effects of this invention are: by monitoring the status of the injection molding machine's solenoid valves in real time, it alerts users to the valve's condition before machine malfunctions occur, allowing for timely troubleshooting. This invention achieves cost-effective solenoid valve fault diagnosis without requiring additional hardware investment, even with existing machine configurations. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the reference curve and real-time curve of the solenoid valve control terminal of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention relates to an intelligent detection method for the status of an electromagnetic directional valve used in injection molding machines, comprising the following steps:

[0022] Step 1: Install the corresponding solenoid valve of the injection molding machine to the corresponding station, and install the injection electronic ruler, mold clamping electronic ruler and ejector pin electronic ruler at the corresponding solenoid valve. At the same time, integrate the IO detection device on the injection molding machine computer.

[0023] Step 2: Through signal transmission between the injection molding machine computer and the solenoid valve, the correctness of the solenoid valve coil wiring is detected using IO detection equipment;

[0024] Step 3: By measuring the positional relationship between the corresponding installed electronic ruler and the corresponding solenoid valve, check whether the solenoid valve is stuck.

[0025] Step 4: The injection molding machine computer collects the motion trajectory curve of the solenoid valve control terminal through sensors, and compares it with the reference curve to detect the smoothness of the solenoid valve core switching.

[0026] Solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation systems used to control fluids. They are actuators, not limited to hydraulic or pneumatic systems. Used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility. There are many types of solenoid valves, each playing a different role in the control system. The most common are check valves, safety valves, directional control valves, and speed regulating valves. A solenoid valve contains a sealed chamber with through-holes at different locations, each connecting to a different oil pipe. Inside the chamber is a piston, flanked by two electromagnets. When the coil of one electromagnet is energized, the valve body is attracted to that side. Controlling the movement of the valve body opens or closes different drain holes, while the inlet hole is always open. Hydraulic oil enters different drain pipes, and the oil pressure pushes the piston in the cylinder, which in turn moves the piston rod, which in turn drives the mechanical device. Thus, controlling the flow of current to the electromagnets controls the mechanical movement. Solenoid valves typically have only two states: on and off. The valve core can only be in two extreme positions, and continuous adjustment is not possible, thus limiting the adjustment accuracy. Solenoid valves have high requirements for the cleanliness of the medium; media containing particulate matter are unsuitable, and impurities must be filtered out first. Furthermore, viscous media are unsuitable, and certain products are applicable to a relatively narrow range of media viscosity.

[0027] The main detection tools used in this invention include injection electronic rulers, mold clamping electronic rulers, ejector pin electronic rulers, pressure sensors, and I / O detection equipment installed on injection molding machines. Without increasing hardware investment, this invention enables cost-effective solenoid valve fault diagnosis under existing machine configurations.

[0028] During the solenoid valve coil wiring correctness test, the injection molding machine computer outputs a digital DO signal to the solenoid valve. When the solenoid valve is normally energized, it feeds back a digital DI signal to the injection molding machine computer. The IO detection equipment detects the digital signals to achieve closed-loop confirmation of the solenoid valve A coil circuit.

[0029] The injection solenoid valve, mold clamping solenoid valve, and ejector pin solenoid valve operate in the same way. Taking the injection solenoid valve as an example, when performing valve jamming detection on the solenoid valve corresponding to the injection solenoid valve, under normal circumstances, when the injection action is performed, the injection solenoid valve A is energized, and the position of the injection solenoid valve gradually decreases; during the release action, the position of the injection solenoid valve gradually increases; under abnormal circumstances, when performing the injection or release action, if the injection cylinder pressure is normal, the position of the injection solenoid valve gradually increases, indicating that the injection solenoid valve is in a jammed state.

[0030] The specific process for testing the smoothness of solenoid valve core switching in step four is as follows: Implement forward and reverse control of the solenoid valve, and detect the position, speed, and time curves under the movement of the control terminal; compare and analyze the baseline curve with the real-time acquired curve to obtain the conclusion on the smoothness of solenoid valve core switching. If the real-time acquired valve core speed curve is too small, it indicates that the valve core switching is not smooth.

[0031] The injection molding machine's computer has a complete simulation model of the machine, which maps the corresponding solenoid valves to those on the machine. This allows for quick and easy location of the faulty solenoid valve, facilitating maintenance and repair. The computer also stores data on all the solenoid valves in the machine, including their model, size, specifications, and manufacturer. A display screen on the machine shows the exact location of the faulty solenoid valve and related information, enabling quick inspection and maintenance.

[0032] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A method for intelligently detecting the status of an electromagnetic directional valve used in an injection molding machine, characterized in that, Includes the following steps: Step 1: Install the corresponding solenoid valve of the injection molding machine to the corresponding station, and install the injection electronic ruler, mold clamping electronic ruler and ejector pin electronic ruler at the corresponding solenoid valve. At the same time, integrate the IO detection device on the injection molding machine computer. Step 2: Through signal transmission between the injection molding machine computer and the solenoid valve, the correctness of the solenoid valve coil wiring is detected using IO detection equipment; Step 3: By measuring the positional relationship between the corresponding installed electronic ruler and the corresponding solenoid valve, check whether the solenoid valve is stuck. Step 4: The injection molding machine's computer collects the motion trajectory curve of the solenoid valve control terminal through sensors, and compares it with a reference curve to detect the smoothness of the solenoid valve core switching; among which, During the process of testing the correctness of the solenoid valve coil wiring, the injection molding machine computer outputs a digital DO signal to the solenoid valve. When the solenoid valve is normally energized, it feeds back a digital DI signal to the injection molding machine computer. The IO testing equipment detects the digital signal to achieve closed-loop confirmation of the solenoid valve A coil circuit. When performing valve jamming detection on the solenoid valve corresponding to the glue injection electronic ruler, under normal circumstances, when glue injection is performed, glue injection solenoid valve A is energized, and the position of glue injection electronic ruler gradually decreases; when retracting, the position of glue injection electronic ruler gradually increases; under abnormal circumstances, when performing glue injection or retracting, if the glue injection cylinder pressure is normal, the position of glue injection electronic ruler gradually increases, indicating that the glue injection solenoid valve is in a jammed state.

2. The intelligent detection method for the status of an electromagnetic directional valve for an injection molding machine according to claim 1, characterized in that, The working principle of injection molding electronic rulers, mold clamping electronic rulers, and ejector pin electronic rulers is the same.

3. The intelligent detection method for the status of an electromagnetic directional valve for an injection molding machine according to claim 1, characterized in that, The specific process for testing the smoothness of solenoid valve core switching in step four is as follows: implement forward and reverse control of the solenoid valve, and detect the position, speed, and time curves under the movement of the control terminal; compare and analyze the baseline curve with the real-time acquired curve to obtain the conclusion on the smoothness of solenoid valve core switching.

4. A method for intelligent detection of the status of an electromagnetic directional valve for an injection molding machine according to any one of claims 1-3, characterized in that, The computer on the injection molding machine has a complete simulation model of the injection molding machine, and the corresponding solenoid valves on the simulation model correspond to the solenoid valves on the injection molding machine.

5. The intelligent detection method for the status of an electromagnetic directional valve for an injection molding machine according to claim 4, characterized in that, The computer on the injection molding machine also stores data information about the solenoid valves of the entire injection molding machine.

6. The intelligent detection method for the status of an electromagnetic directional valve for an injection molding machine according to claim 5, characterized in that, The injection molding machine is equipped with a corresponding display screen to show the specific location of the faulty solenoid valve and related information.

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