Template action precision control device and system of two-plate type multi-component injection molding machine

Abstract

The invention discloses a template action precision control device and system of a two-plate type multi-component injection molding machine. The device comprises a fixed template; a movable template; the mold clamping oil cylinder is connected with the movable mold plate and can supply power to the movable mold plate; the pressurizing oil cylinder is provided with a piston rod which penetrates through the fixed template and is connected with the movable template; the pressure sensor is installed on the pressurizing oil cylinder and used for monitoring the pressure value of the pressurizing oil cylinder in real time; the tooth binding oil cylinder is used for connecting the movable template with a piston rod of the pressurizing oil cylinder; and the controller is used for controlling the actions of the die clamping oil cylinder, the pressurizing oil cylinder and the tooth binding oil cylinder so as to realize the accurate micro-opening action control of the movable template. The movable mold plate and the fixed mold plate are oppositely arranged, the pressurizing oil cylinder is connected with the movable mold plate through a piston rod to provide mold clamping force, the pressure sensor monitors pressure in real time, and the controller coordinates all the oil cylinders to act. The control system comprises five steps of pressure relief, pressure detection, mold opening, position control and injection.

Description

Technical Field

[0001] This invention relates to the technical field of injection molding machines, and more particularly to a precision control device and system for the template movement of a two-platen multi-component injection molding machine. Background Technology

[0002] Injection molding is a crucial process in the production of plastic products, and the opening and closing control of the mold directly affects product quality and production stability. Based on their structural characteristics, injection molding machines are mainly divided into two types: two-platen machines and three-platen machines. Among them, two-platen machines are widely used in industrial production due to their simple structure and convenient maintenance.

[0003] The existing micro-opening control technology of two-platen injection molding machines has serious technical defects. The traditional micro-opening action of two-platen injection molding machines uses four tie rods to pull the movable template open in opposite directions. At this time, during the injection action, since the tie rods do not hold the movable template, the movable template is in a non-stressed state. Injection will cause the template to be stretched open, affecting the molding stability. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by the present invention is to provide a precision control device and system for the template movement of a two-platen multi-component injection molding machine. Through multi-cylinder coordinated control, pressure-position dual closed-loop feedback, PID dynamic adjustment and full-process fault monitoring, the device achieves high precision, high synchronization and high safety of the micro-opening movement of the injection molding machine template. It is especially suitable for high-quality injection molding processes with strict requirements for the micro-opening amount of the mold.

[0006] (II) Technical Solution

[0007] The solution adopted by this invention to solve the above-mentioned technical problems is a precision control device for the template movement of a two-platen multi-component injection molding machine, including...

[0008] Fixed template;

[0009] An active template, which is arranged opposite to the fixed template and can move closer to or further away from the fixed template;

[0010] A clamping cylinder is connected to the movable template and can provide power to the movable template to drive it closer to or further away from the fixed template.

[0011] A pressure cylinder has a piston rod that passes through the fixed template and is connected to the movable template, and is capable of providing a clamping force for closing the fixed template and the movable template;

[0012] A pressure sensor is installed on the pressurizing cylinder to monitor the pressure value of the pressurizing cylinder in real time;

[0013] A toothed hydraulic cylinder is used to connect the movable template and the piston rod of the pressurizing hydraulic cylinder;

[0014] The controller is electrically connected to the pressure sensor, clamping cylinder, pressurizing cylinder, and tooth-binding cylinder. It is used to receive the pressure signal from the pressure sensor and coordinate the movement of the clamping cylinder, pressurizing cylinder, and tooth-binding cylinder according to the preset template micro-opening control program, so as to realize the precise micro-opening movement control of the movable template.

[0015] Using the above scheme, the clamping cylinder provides power to drive the movable template to move, ensuring the stability and controllability of the mold opening action; the piston rod of the pressure cylinder passes through the fixed template and connects to the movable template, providing clamping force to ensure the sealing and resistance to injection pressure when the mold is closed; the pressure sensor monitors the pressure of the pressure cylinder in real time, providing data support for closed-loop control and avoiding mold damage or product quality problems caused by abnormal pressure; the threaded cylinder connects the movable template and the piston rod of the pressure cylinder to ensure synchronous movement of the two and prevent the piston rod from disengaging from the movable template. All components work in coordination to form a complete template micro-opening action control system.

[0016] In some embodiments, the number of clamping cylinders is two, the number of pressurizing cylinders is four, and the number of tooth-binding cylinders is two.

[0017] Specifically, the two clamping cylinders are symmetrically arranged to ensure that the movable template moves in parallel; the symmetrical layout of the four pressurizing cylinders forms four-corner support, evenly distributing the clamping force and avoiding deformation or off-center loading caused by uneven force on the mold; the design of the two toothed cylinders further enhances the connection stability between the movable template and the piston rod, ensuring the synchronization of the micro-opening action.

[0018] In some embodiments, a position sensor is also included for detecting the actual position of the active template.

[0019] By adopting the above scheme, the position sensor detects the actual position of the moving template in real time, and combines it with the pressure sensor data to realize dual closed-loop control (pressure + position), which improves the accuracy and reliability of micro-opening action, prevents position deviation caused by mechanical error or cylinder pressure fluctuation, and ensures the consistency of micro-opening amount.

[0020] The solution adopted by this invention to solve the above-mentioned technical problems is a system for precision control of the template movement of a two-platen multi-component injection molding machine, comprising the following steps:

[0021] S1, depressurization step: Under high pressure, the pressurized oil cylinder is depressurized from the high pressure state to the set pressure value;

[0022] S2, Pressure detection step: Determine whether the pressure of the pressurizing cylinder has reached the set pressure value. If not, continue to release pressure until the pressure reaches the set pressure value. After all four pressurizing cylinders have reached the set pressure value, proceed to the next step.

[0023] S3, Mold opening step: The clamping cylinder pushes the movable template to slowly perform the mold opening action, while the four pressure cylinders are slowly pulled apart. During this process, the toothed cylinder remains closed.

[0024] S4, Position control step: Determine whether the movable template has reached the set position. If the position has not been reached, the pressurizing cylinder continues to depressurize, allowing the movable template to move further until the movable template reaches the set position. At the same time, the pressure of the four pressurizing cylinders is monitored by four pressure sensors respectively, and a PID control algorithm is used to ensure that the values ​​of the four pressure sensors are consistent.

[0025] S5, Injection step: Perform the injection action while the movable template remains in the open state, maintaining the position of the movable template.

[0026] The above scheme employs a step-by-step control logic (pressure relief → detection → mold opening → position control → injection) to ensure orderly operation and avoid equipment damage caused by misoperation or sudden pressure changes. The pressure relief steps (S1-S2) gradually release pressure to a set pressure value (e.g., 5-10 bar) to provide a safe pressure environment for the micro-opening action. In the mold opening step (S3), the clamping cylinder and the pressurizing cylinder work together to achieve slow and smooth micro-opening, avoiding product damage or mold collision. The position control step (S4) uses a PID control algorithm to dynamically adjust the pressure consistency of the four pressurizing cylinders, ensuring synchronous micro-opening at the four corners of the mold and preventing mold distortion. In the injection step (S5), the mold is maintained in an open state to prevent injection pressure from opening the mold and to ensure product dimensional accuracy.

[0027] In some embodiments, the set pressure value is 5-10 bar.

[0028] In some embodiments, too low a pressure may cause the mold to open unexpectedly, while too high a pressure may hinder the micro-opening action. This range has been experimentally verified to effectively resist injection pressure while allowing the micro-opening action to be performed smoothly. The set pressure value is a pressure value that can resist part of the opening force during injection while allowing the mold to open slightly, specifically 5-10 bar. The minimum pressure setting of 5 bar can maintain basic mold positioning and sealing. The maximum pressure setting of 10 bar is sufficient to resist the opening force in the micro-opening state.

[0029] In some embodiments, the tooth-binding cylinder remains closed throughout steps S3 to S5 to ensure that the movable template and the piston rod of the pressurizing cylinder are always in contact.

[0030] By adopting the above scheme, the tooth-binding cylinder remains closed at all times, ensuring that the movable template and the piston rod are in close contact, avoiding slight position deviation or mechanical impact caused by piston rod loosening, thus enhancing system rigidity and improving stability during the injection stage.

[0031] In some embodiments, during steps S3 to S5, the pressurizing cylinder maintains the set pressure value, and the pressure of the pressurizing cylinder can resist the spreading force during the injection process, preventing the mold from being stretched open during injection.

[0032] By adopting the above solution, the pressurized hydraulic cylinder maintains the set pressure value, which provides sufficient clamping force to resist the injection opening force, while avoiding excessive pressure that may hinder the micro-opening action, thus balancing the needs of clamping and micro-opening and optimizing the process effect.

[0033] In some embodiments, in step S4, the pressure values ​​of the four pressurizing cylinders are monitored in real time by four pressure sensors, and the controller compares the feedback values ​​of the four pressure sensors in real time. The PID control ensures the consistency of the positions of the four corners when the mold is slightly opened.

[0034] By adopting the above scheme, the pressure of the four cylinders is compared and adjusted in real time through four pressure sensors and PID control to ensure that the four corners of the mold open synchronously and eliminate the risk of off-center loading. The PID control algorithm dynamically compensates for pressure fluctuations and adjusts automatically without manual intervention, thereby improving the control response speed and stability.

[0035] In some embodiments, in step S2, when the pressure values ​​detected by the four pressure sensors are all within the range of the set pressure value ± 0.5 bar, it is determined that the pressure of the pressurizing cylinder has reached the set pressure value.

[0036] By adopting the above scheme, a pressure tolerance range of ±0.5 bar is set to ensure consistency while avoiding system oscillation caused by over-adjustment.

[0037] In some embodiments, S0, a fault detection step, is further included and is continuously executed throughout the control process: real-time monitoring of the reading status of the four pressure sensors; when the reading of any pressure sensor is abnormal or the difference in the readings of the four pressure sensors exceeds a preset threshold, the system automatically shuts down and alarms; this step runs through the entire process from step S1 to step S5 to ensure the safe operation of the system.

[0038] Using the above solution, fault detection is carried out throughout the entire process, the status of the pressure sensor is monitored in real time, and the machine is immediately shut down and alarmed when abnormality occurs, to prevent equipment damage or safety accidents.

[0039] (III) Beneficial Effects

[0040] Compared with the prior art, the present invention designs a precision control device and system for the template movement of a two-platen multi-component injection molding machine.

[0041] (1) The present invention provides power to drive the movable template to move through the clamping cylinder, ensuring the stability and controllability of the mold opening action; the piston rod of the pressure cylinder passes through the fixed template and is connected to the movable template to provide clamping force, ensuring the sealing and anti-injection pressure capability when the mold is closed; the pressure sensor monitors the pressure of the pressure cylinder in real time, providing data support for closed-loop control and avoiding mold damage or product quality problems caused by abnormal pressure; the toothed cylinder connects the movable template and the piston rod of the pressure cylinder to ensure that the two move synchronously, prevent the piston rod from separating from the movable template, and the components work in coordination to form a complete template micro-opening action control system;

[0042] (2) The present invention uses a position sensor to detect the actual position of the active template in real time, and combines it with the pressure sensor data to realize dual closed-loop control (pressure + position), improve the accuracy and reliability of micro-opening action, prevent position deviation caused by mechanical error or cylinder pressure fluctuation, and ensure the consistency of micro-opening amount;

[0043] (3) The step-by-step control logic of the present invention (pressure relief → detection → mold opening → position control → injection) ensures that the actions are carried out in an orderly manner and avoids equipment damage caused by misoperation or pressure change; the pressure relief step (S1-S2) gradually relieves pressure to the set pressure value (e.g., 5-10 bar) to provide a safe pressure environment for the micro-opening action; in the mold opening step (S3), the clamping cylinder and the pressurizing cylinder work together to achieve slow and stable micro-opening and avoid product tearing or mold collision; the position control step (S4) dynamically adjusts the pressure consistency of the four pressurizing cylinders through the PID control algorithm to ensure that the four corners of the mold open synchronously and prevent mold distortion; in the injection step (S5), the mold opening state is maintained to avoid the injection pressure from opening the mold and to ensure the product dimensional accuracy;

[0044] (4) The toothed cylinder of the present invention always remains closed, ensuring that the movable template and the piston rod are tightly fitted, avoiding the deviation of the micro-opening position or mechanical impact caused by the loosening of the piston rod, thus enhancing the rigidity of the system and improving the stability of the injection stage; the pressurizing cylinder maintains the set pressure value, which provides sufficient clamping force to resist the injection opening force, and avoids excessive pressure from hindering the micro-opening action, balancing the needs of clamping and micro-opening, and optimizing the process effect;

[0045] (5) The present invention uses four pressure sensors + PID control to compare and adjust the pressure of four oil cylinders in real time to ensure that the four corners of the mold open synchronously and eliminate the risk of off-center load; the PID control algorithm dynamically compensates for pressure fluctuations and automatically adjusts without manual intervention, thereby improving the control response speed and stability.

[0046] (6) The fault detection of the present invention is carried out throughout the entire process, and the status of the pressure sensor is monitored in real time. When an abnormality occurs, the machine is stopped and an alarm is triggered immediately to prevent equipment damage or safety accidents. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the template movement precision control device for a two-plate multi-component injection molding machine according to the present invention.

[0049] Figure 2 This is a flowchart of a precision control device for template movement in a two-platen multi-component injection molding machine according to the present invention.

[0050] The component names corresponding to the various labels in the figure are: 10, mold; 100, fixed template; 200, movable template; 300, clamping cylinder; 400, pressurizing cylinder; 401, piston rod; 500, pressure sensor; 600, toothed cylinder. Detailed Implementation

[0051] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] It should be noted that the following description covers various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0055] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0056] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0057] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0058] like Figure 1As shown, the present invention provides a precision control device for the template movement of a two-platen multi-component injection molding machine, including a fixed template 100; a movable template 200, which is arranged opposite to the fixed template 100 and can move closer to or away from the fixed template 100; a clamping cylinder 300, which is connected to the movable template 200 and can provide power to the movable template 200 to drive it closer to or away from the fixed template 100; and a pressurizing cylinder 400, which has a piston rod 401 that passes through the fixed template 100 and is connected to the movable template 200, and can provide closing force for the fixed template 100 and the movable template 200. Clamping force; pressure sensor 500, which is installed on the pressurizing cylinder 400, is used to monitor the pressure value of the pressurizing cylinder 400 in real time; toothed cylinder 600 is used to connect the movable template 200 and the piston rod 401 of the pressurizing cylinder 400; controller (not shown in the figure), which is electrically connected to the pressure sensor 500, clamping cylinder 300, pressurizing cylinder 400 and toothed cylinder 600, is used to receive the pressure signal from the pressure sensor 500, and coordinate the operation of the clamping cylinder 300, pressurizing cylinder 400 and toothed cylinder 600 according to the preset template micro-opening control program, so as to realize the precise micro-opening action control of the movable template 200. Using the above scheme, the clamping cylinder 300 provides power to drive the movable template 200 to move, ensuring the stability and controllability of the mold opening action; the piston rod 401 of the pressure cylinder 400 passes through the fixed template 100 and is connected to the movable template 200, providing clamping force to ensure the sealing and injection pressure resistance of the mold 10 when it is closed; the pressure sensor 500 monitors the pressure of the pressure cylinder 400 in real time, providing data support for closed-loop control and avoiding damage to the mold 10 or product quality problems caused by abnormal pressure; the toothed cylinder 600 connects the movable template 200 and the piston rod 401 of the pressure cylinder 400 to ensure that the two move synchronously and prevent the piston rod 401 from disengaging from the movable template 200. All components work in coordination to form a complete template micro-opening action control system.

[0059] In some embodiments, the number of clamping cylinders 300 is two, the number of pressurizing cylinders 400 is four, and the number of threaded cylinders 600 is two. Specifically, the two clamping cylinders 300 are symmetrically arranged to ensure that the movable template 200 moves in parallel; the symmetrical layout of the four pressurizing cylinders 400 forms four-corner supports, evenly distributing the clamping force and avoiding deformation or off-center loading caused by uneven force on the mold 10; the design of the two threaded cylinders 600 further enhances the connection stability between the movable template 200 and the piston rod 401, ensuring the synchronization of the micro-opening action.

[0060] In some embodiments, a position sensor (not shown) is also included to detect the actual position of the movable template 200. Using the above scheme, the position sensor detects the actual position of the movable template 200 in real time, and combines this with data from the pressure sensor 500 to achieve dual closed-loop control (pressure + position), improving the accuracy and reliability of the micro-opening action, preventing position deviations caused by mechanical errors or cylinder pressure fluctuations, and ensuring the consistency of the micro-opening amount.

[0061] like Figure 1-2 As shown, the present invention provides a system for precision control of template movement in a two-platen multi-component injection molding machine, comprising the following steps:

[0062] S0, the fault detection step, is continuously executed throughout the entire control process: real-time monitoring of the reading status of the four pressure sensors 500. When the reading of any pressure sensor 500 is abnormal or the difference in readings of the four pressure sensors 500 exceeds a preset threshold, the system automatically shuts down and alarms. This step runs through the entire process from step S1 to step S5 to ensure the safe operation of the system. Fault detection is carried out throughout the entire process, real-time monitoring of the status of the pressure sensors 500, and immediate shutdown and alarm when abnormalities occur to prevent equipment damage or safety accidents.

[0063] S1, depressurization step: Under high pressure, the pressurized cylinder 400 is depressurized from the high pressure state to the set pressure value;

[0064] S2, Pressure Detection Step: Determine whether the pressure of the pressurizing cylinder 400 has reached the set pressure value, which is 7 bar; when the pressure values ​​detected by the four pressure sensors 500 are all within the range of 7 ± 0.5 bar, that is, between 6.5 and 7.5 bar, the controller determines that the pressure has reached the set pressure value; if the reading of any pressure sensor 500 exceeds this range, the system continues to adjust the pressure of the corresponding pressurizing cylinder 400 to continue depressurizing until the pressure reaches the set pressure value; after the pressure of all four pressurizing cylinders 400 has reached the set pressure value, proceed to the next step;

[0065] S3, mold opening step: After the pressure of the four pressure cylinders 400 reaches the set pressure value, the clamping cylinder 300 pushes the movable template 200 to slowly perform the mold opening action. At the same time, the four pressure cylinders 400 are slowly pulled apart. During this process, the toothed cylinder 600 remains in a closed state.

[0066] S4, Position control step: Determine whether the movable template 200 has reached the set position. If the position has not been reached, the pressure cylinder 400 continues to depressurize, allowing the movable template 200 to move further until the movable template 200 reaches the set position. During this process, the pressure values ​​of the four pressure cylinders 400 are monitored in real time by four pressure sensors 500. The controller compares the feedback values ​​of the four pressure sensors 500 in real time and uses a PID control algorithm to ensure that the values ​​of the four pressure sensors 500 remain consistent, so as to adjust and ensure the consistency of the positions of the four corners when the mold 10 is slightly opened.

[0067] S5, Injection step: Perform the injection action. During this process, the movable template 200 remains in the open state, maintaining the position of the movable template 200.

[0068] The above scheme employs a step-by-step control logic (pressure relief → detection → mold opening → position control → injection) to ensure orderly operation and avoid equipment damage caused by misoperation or sudden pressure changes. The pressure relief step (S1-S2) gradually releases pressure to a set pressure value (e.g., 5-10 bar) to provide a safe pressure environment for the micro-opening action. In the mold opening step (S3), the clamping cylinder 300 and the pressurizing cylinder 400 work together to achieve slow and smooth micro-opening, avoiding product damage or collision with the mold 10. The position control step (S4) dynamically adjusts the pressure consistency of the four pressurizing cylinders 400 through a PID control algorithm to ensure synchronous micro-opening of the four corners of the mold 10 and prevent the mold 10 from twisting. In the injection step (S5), the mold is kept open to prevent the injection pressure from forcing the mold 10 open and to ensure product dimensional accuracy.

[0069] Specifically, in step S4, the pressure of the four cylinders is compared and adjusted in real time by using four pressure sensors and 500+PID control to ensure that the four corners of the mold 10 open synchronously and eliminate the risk of off-center loading. The PID control algorithm dynamically compensates for pressure fluctuations and adjusts automatically without manual intervention, thereby improving the control response speed and stability.

[0070] In some embodiments, the tooth-binding cylinder 600 remains closed throughout steps S3 to S5, ensuring that the movable template 200 and the piston rod 401 of the pressurizing cylinder 400 are always in contact. By employing this scheme, the tooth-binding cylinder 600 remains closed, ensuring a tight fit between the movable template 200 and the piston rod 401, avoiding slight positional deviations or mechanical impacts caused by loosening of the piston rod 401, thus enhancing system rigidity and improving stability during the injection phase.

[0071] In some embodiments, during steps S3 to S5, the pressure cylinder 400 maintains the set pressure value. The pressure of the pressure cylinder 400 can resist the expansion force during the injection process, preventing the mold 10 from being expanded during injection. By adopting the above solution, the pressure cylinder 400 maintains the set pressure value, providing sufficient clamping force to resist the injection expansion force while avoiding excessive pressure that could hinder the micro-opening action. This balances the needs of clamping and micro-opening, optimizing the process effect.

[0072] In some embodiments, in step S2, when the pressure values ​​detected by the four pressure sensors 500 are all within the range of the set pressure value ±0.5 bar, it is determined that the pressure of the pressurizing cylinder 400 has reached the set pressure value. By adopting the above scheme, a pressure allowable deviation range (±0.5 bar) is set, ensuring consistency while avoiding system oscillations caused by over-adjustment.

[0073] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0074] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A precision control device for the template movement of a two-platen multi-component injection molding machine, characterized in that: include Fixed template (100); An active template (200) is arranged opposite to the fixed template (100) and can move closer to or further away from the fixed template (100). A clamping cylinder (300) is connected to the movable template (200) and can provide power to the movable template (200) to drive the movable template (200) to move closer to or away from the fixed template (100). A pressure cylinder (400) has a piston rod (401) that passes through the fixed template (100) and is connected to the movable template (200), and is capable of providing a clamping force for closing the fixed template (100) and the movable template (200); A pressure sensor (500) is installed on the pressurizing cylinder (400) to monitor the pressure value of the pressurizing cylinder (400) in real time; A toothed cylinder (600) is used to connect the movable template (200) and the piston rod (401) of the pressurizing cylinder (400). The controller is electrically connected to the pressure sensor (500), the clamping cylinder (300), the pressurizing cylinder (400), and the tooth-binding cylinder (600). It is used to receive the pressure signal from the pressure sensor (500) and coordinate the operation of the clamping cylinder (300), the pressurizing cylinder (400), and the tooth-binding cylinder (600) according to the preset template micro-opening control program, so as to realize the precise micro-opening action control of the movable template (200).

2. The precision control device for template movement of the two-platen multi-component injection molding machine according to claim 1, characterized in that: The number of clamping cylinders (300) is two, the number of pressurizing cylinders (400) is four, and the number of tooth-binding cylinders (600) is two.

3. The precision control device for template movement of the two-platen multi-component injection molding machine according to claim 1, characterized in that: It also includes a position sensor for detecting the actual position of the active template (200).

4. A system for precision control of template movement in a two-platen multi-component injection molding machine as described in any one of claims 1-3, characterized in that: Includes the following steps: S1, depressurization step: under high pressure, the pressurized cylinder (400) is depressurized from the high pressure state to the set pressure value; S2, Pressure detection step: Determine whether the pressure of the pressurizing cylinder (400) has reached the set pressure value. If it has not reached the set pressure value, continue to release pressure until the pressure reaches the set pressure value. After the pressure of all four pressurizing cylinders (400) has reached the set pressure value, proceed to the next step. S3, mold opening step: The clamping cylinder (300) pushes the movable template (200) to slowly perform the mold opening action, while the four pressure cylinders (400) are slowly pulled apart. During this process, the toothed cylinder (600) remains closed. S4, Position control step: Determine whether the movable template (200) has reached the set position. If the position has not been reached, the pressurizing cylinder (400) continues to depressurize, allowing the movable template (200) to move further until the movable template (200) reaches the set position. At the same time, the pressure of the four pressurizing cylinders (400) is monitored by four pressure sensors (500), and a PID control algorithm is used to ensure that the values ​​of the four pressure sensors (500) remain consistent. S5, Injection step: Perform the injection action while the active template (200) remains in the open state, maintaining the position of the active template (200).

5. The system of the template movement precision control device for a two-platen multi-component injection molding machine according to claim 4, characterized in that: The set pressure value is 5-10 bar.

6. The system of the template movement precision control device for a two-platen multi-component injection molding machine according to claim 4, characterized in that: The tooth-binding cylinder (600) remains closed throughout steps S3 to S5, ensuring that the movable template (200) and the piston rod (401) of the pressurizing cylinder (400) are always in contact.

7. The system of the template movement precision control device for a two-platen multi-component injection molding machine according to claim 4, characterized in that: In steps S3 to S5, the pressurizing cylinder (400) always maintains the set pressure value. The pressure of the pressurizing cylinder (400) can resist the opening force during the injection process and prevent the mold (10) from being opened during the injection process.

8. The system of the template movement precision control device for a two-platen multi-component injection molding machine according to claim 4, characterized in that: In step S4, the pressure values ​​of the four pressurizing cylinders (400) are monitored in real time by four pressure sensors (500). The controller compares the feedback values ​​of the four pressure sensors (500) in real time and ensures the consistency of the position of the four corners when the mold (10) is slightly opened by PID adjustment.

9. The system of the template movement precision control device for a two-platen multi-component injection molding machine according to claim 4, characterized in that: In step S2, when the pressure values ​​detected by the four pressure sensors (500) are all within the range of the set pressure value ± 0.5 bar, it is determined that the pressure of the pressurizing cylinder (400) has reached the set pressure value.

10. The system of the template movement precision control device for a two-platen multi-component injection molding machine according to claim 4, characterized in that: It also includes S0, the fault detection step, which is continuously executed throughout the control process: real-time monitoring of the reading status of four pressure sensors (500). When the reading of any pressure sensor (500) is abnormal or the difference in the readings of the four pressure sensors (500) exceeds a preset threshold, the system automatically shuts down and alarms. This step runs through the entire process from step S1 to step S5 to ensure the safe operation of the system.

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