A method and system for synchronizing the control of an injection molding machine's electric door and mold opening actions

Abstract

The application relates to a synchronous control method and system of an injection molding machine electric door and mold opening action, and relates to the field of injection molding machine control, which comprises the following steps: step 100: acquiring a mold plate position and a mold plate speed; step 200: determining a motion stage based on the mold plate position and preset stroke parameters; step 300: determining a theoretical coefficient according to the motion stage; step 400: determining an expected speed by combining the mold plate speed and the theoretical coefficient; and step 500: generating an electric door control instruction and a synchronous display instruction according to the expected speed. The application has the effect of accurately controlling the running speed of the electric door.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine control, and in particular to a method and system for synchronously controlling the electric door and mold opening action of an injection molding machine. Background Technology

[0002] Mold opening and part removal refers to the technique of opening the mold through the mold opening mechanism after the injection molding machine has completed the injection molding operation, and then using external equipment to remove the injection molded product.

[0003] During the mold opening and part removal process, the electric door of the operating area needs to be opened by the electric door drive mechanism so that the external equipment can safely remove the injection molded product. Existing technology usually uses a sequential control method to control the electric door and the mold opening mechanism. For example, the mold opening action is completed first and then the electric door is opened, or both are started at the same time but each runs at a preset fixed speed.

[0004] Due to the fundamental differences in mechanical characteristics, load conditions, and transmission efficiency between the mold opening mechanism and the electric door drive mechanism, the actual speed of the mold plate will fluctuate under different working conditions. Using a fixed speed ratio cannot dynamically match the actual speed of the mold plate and the electric door, resulting in low speed control accuracy of the electric door. Summary of the Invention

[0005] To accurately control the operating speed of the electric door, this invention provides a method and system for synchronously controlling the electric door and mold opening action of an injection molding machine.

[0006] In a first aspect, the present invention provides a method for synchronously controlling the electric door and mold opening action of an injection molding machine, which adopts the following technical solution: A method for synchronously controlling the electric door and mold opening action of an injection molding machine, comprising: Step 100: Obtain template position and template speed; Step 200: Determine the motion stage based on the template position and preset stroke parameters; Step 300: Determine the theoretical coefficients according to the described motion stage; Step 400: Determine the desired velocity by combining the template velocity and the theoretical coefficients; Step 500: Generate throttle control instructions and synchronization display instructions according to the desired speed.

[0007] By adopting the above technical solution, the real-time position of the template is used as a reference to determine the motion stage of the template. Theoretical coefficients are then retrieved based on the motion stage to determine the desired speed of the electric gate. The electric gate is then controlled to operate according to the desired speed, so that the speed of the electric gate and the speed of the template are dynamically matched, thereby improving the accuracy of the electric gate speed control.

[0008] Optionally, the method for determining the theoretical coefficients further includes: Step 301: Retrieve the total template travel and total door travel from the travel parameters; Step 302: Determine the stroke ratio coefficient based on the total travel of the template and the total travel of the door, and determine the slow-opening coefficient according to the movement stage; Step 303: Determine the speed coefficient by combining the stroke ratio coefficient and the gradual opening coefficient; Step 304: Update the theoretical coefficients according to the velocity coefficients.

[0009] By adopting the above technical solution, the template speed is different in each movement stage, which will change the fluctuation of the movement speed between the template and the electric door. At this time, the stroke ratio coefficient is determined according to the total stroke of the template and the electric door, and the speed coefficient is determined in combination with the movement stage, so as to correct the speed of the electric door, so that the speed of the electric door and the speed of the template are dynamically matched, thereby improving the accuracy of the speed control of the electric door.

[0010] Optionally, the method for determining the desired speed further includes: Step 401: Obtain the position of the ignition switch, and determine the progress deviation by combining the template position and the ignition switch position; Step 402: Determine the deviation coefficient based on the schedule deviation; Step 403: Update the synchronization display command based on the deviation coefficient, and calculate the product of the deviation coefficient and the desired speed as the adjustment speed; Step 404: Update the desired speed according to the adjusted speed.

[0011] By adopting the above technical solution, when the relative position of the electric gate and the template fluctuates, safety hazards may arise. At this time, the progress deviation is calculated based on the real-time position of the template and the real-time position of the electric gate, thereby correcting the desired speed and improving the accuracy of the electric gate speed control.

[0012] Optionally, the method for calculating the schedule deviation further includes: Step 405: Calculate the quotient of the switch position and the theoretical coefficient as the calculation position of the template; Step 406: Calculate the difference between the template position and the calculated position as the progress deviation.

[0013] By adopting the above technical solution, during the mold opening and part removal process, the position of the electric door may be abnormal due to mechanical reasons. At this time, the calculated position is determined based on the position of the electric door and the theoretical coefficient, and the progress deviation is determined in combination with the position of the template to show the actual position of the electric door.

[0014] Optionally, the method for determining the desired speed further includes: Step 407: Determine the speed range based on the adjusted speed; Step 408: Determine the modified speed based on the adjusted speed and speed range; Step 409: Update the desired speed according to the modified speed.

[0015] By adopting the above technical solution, safety hazards may arise when the opening speed of the electric gate is too fast or too slow. In this case, the range of the desired speed is determined based on the speed of the template, and the desired speed is adjusted to improve the accuracy of the electric gate speed control.

[0016] Optionally, the optimization method for the theoretical coefficients includes: Step 600: Determine the number of generation times based on the power switch control command; Step 601: When the number of generation times matches the preset fitting period, retrieve historical data based on the fitting period; Step 602: Determine the cumulative velocity and squared velocity based on the historical data; Step 603: Determine the optimal coefficients based on the cumulative velocity and the squared velocity; Step 604: Update the theoretical coefficients according to the optimal coefficients.

[0017] By adopting the above technical solution, after a long period of operation, the transmission characteristics of the injection molding machine will change due to different mold loads or mechanical wear, which will lead to fluctuations in the speed coefficient. At this time, historical data is retrieved according to the fitting period, and the speed coefficient is corrected based on the historical data to improve the accuracy of electric door speed control.

[0018] Optionally, the method for calculating the optimal coefficient includes: Step 605: Determine the historical switch speed and historical template speed based on the historical data; Step 606: Calculate the product of the historical gate speed and the historical template speed, accumulate them to determine the cumulative speed, and accumulate the squares of the historical template speed to determine the square speed; Step 607: Calculate the quotient of the cumulative velocity and the square velocity to determine the optimal coefficient.

[0019] By adopting the above technical solution, the product of all the electric gate speeds and template speeds within a cycle is accumulated, and the optimal coefficient is determined by combining the accumulated value of the squares of all template speeds, thereby correcting the running speed of the electric gate and improving the accuracy of electric gate speed control.

[0020] Secondly, this application provides a synchronous control system for the electric door and mold opening action of an injection molding machine, which adopts the following technical solution: The mold opening unit is used to collect the mold position and speed in real time. The electric door drive unit is used to collect the electric door's position and speed in real time. The central controller is used to store and process the program of the above-mentioned method for synchronizing the electric door and mold opening action of an injection molding machine; The human-machine interface is used to display the human-machine interface for staff to input travel parameters, and to display the progress deviation and speed coefficient.

[0021] By adopting the above technical solution, the real-time position of the template is used as a reference to determine the motion stage of the template. The theoretical coefficients are then retrieved based on the motion stage to determine the desired speed of the electric gate. The electric gate is then controlled to operate according to the desired speed, thereby improving the accuracy of the electric gate speed.

[0022] In summary, this application includes at least one of the following beneficial technical effects: Based on the real-time position of the template, the motion stage of the template is determined. Then, theoretical coefficients are retrieved according to the motion stage to determine the desired speed of the electric gate. The electric gate is then controlled to operate according to the desired speed, so that the speed of the electric gate and the speed of the template are dynamically matched, thereby improving the accuracy of the electric gate speed control. The template speed varies in each movement stage, which changes the fluctuation of the movement speed between the template and the electric gate. At this time, the stroke ratio coefficient is determined based on the total stroke of the template and the electric gate, and the speed coefficient is determined in combination with the movement stage, so as to correct the speed of the electric gate, so that the speed of the electric gate and the speed of the template are dynamically matched, thereby improving the accuracy of the speed control of the electric gate. When the relative positions of the electric gate and the template fluctuate, safety hazards may arise. In this case, the progress deviation is calculated based on the real-time position of the template and the real-time position of the electric gate, thereby correcting the desired speed and improving the accuracy of the electric gate speed control. Attached Figure Description

[0023] Figure 1 This is a flowchart of a method for synchronously controlling the electric door and mold opening action of an injection molding machine. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] This application discloses a method and system for synchronously controlling the electric door and mold opening action of an injection molding machine.

[0026] A synchronous control system for the electric door and mold opening action of an injection molding machine includes: The mold opening unit is used to collect the mold position and speed in real time.

[0027] The mold opening unit includes a hydraulic cylinder, a mold opening valve, and a mold position gauge. The mold position gauge is used to provide real-time feedback on the speed and position of the mold to the central controller. The hydraulic cylinder and the mold opening valve are used to perform the mold opening action.

[0028] The electric door drive unit is used to collect the electric door's position and speed in real time.

[0029] The electric door drive unit includes a door drive motor, a transmission mechanism, and a door position detection device. The door position detection device can be an electric door position ruler, which is used to provide real-time feedback of the door speed and door position to the central controller. The door drive motor and transmission mechanism are used to control the running speed of the electric door.

[0030] The central controller is used to store and process the program of the above-mentioned method for synchronizing the electric door and mold opening action of an injection molding machine.

[0031] The central controller includes a processing chip and a memory. The processing chip is used to receive data from the mold opening unit, the electric door drive unit and the human-machine interface, and execute a synchronous control method for the electric door and mold opening action of the injection molding machine. It calculates the speed of the electric door, thereby generating electric door control instructions, and numbers and records the electric door control instructions and corresponding data in the memory according to the time sequence.

[0032] The human-machine interface is used to display the human-machine interface for staff to input travel parameters, and to display the progress deviation and speed coefficient.

[0033] The human-machine interface includes a touch screen, which is used to display progress deviation, speed coefficient and input stroke parameters. After the operator inputs the stroke parameters, the touch screen reads the data information from the human-machine interface and sends it to the central controller.

[0034] Based on the same inventive concept, embodiments of the present invention provide a method for synchronously controlling the electric door and mold opening action of an injection molding machine, including: Reference Figure 1 A method for synchronously controlling the electric door and mold opening action of an injection molding machine, comprising: Step 100: Obtain the template position and template speed.

[0035] Template position refers to the real-time reading of the template position ruler, which is collected in real time.

[0036] Template speed refers to the real-time speed of the template. The difference between the current template position and the template position one sampling period ago can be used as the change distance. The quotient of the change distance and the sampling period is calculated as the current template speed. In this embodiment, the sampling period is 5ms.

[0037] Step 200: Determine the motion stage based on the template position and preset stroke parameters.

[0038] The stroke parameters refer to the set of parameters used to determine the stroke range of each stage of mold opening and the total stroke of the electric door. These parameters include the total stroke of the mold template, the total stroke of the door, the end position of the initial slow segment, and the end position of the intermediate fast segment. The stroke parameters are pre-input by the staff through the human-machine interface.

[0039] The motion phase refers to the speed phase of the template, including the initial slow phase, the middle fast phase, and the final slow phase. When the template position is not less than zero and is less than the end position of the initial slow phase, it is determined to be the initial slow phase. When the template position is not less than the end position of the initial slow phase and is less than the end position of the middle fast phase, it is determined to be the middle fast phase. When the template position is not less than the end position of the middle fast phase and is not greater than the total template travel, it is determined to be the final slow phase. The total door travel, the end position of the initial slow phase, and the end position of the middle fast phase are read from the travel parameters.

[0040] Step 300: Determine the theoretical coefficients according to the described motion stage.

[0041] The theoretical coefficient refers to the speed relationship coefficient between the electric gate and the template. It can be calculated according to the formula of total gate travel / total template travel, and can be determined by referring to the determination method of theoretical coefficient in steps 301 to 304 below.

[0042] Step 400: Determine the desired velocity by combining the template velocity and the theoretical coefficient.

[0043] The desired speed refers to the speed at which the electric gate opens. The desired speed can be obtained by multiplying the template speed and the theoretical coefficient.

[0044] Step 500: Generate throttle control instructions and synchronization display instructions according to the desired speed.

[0045] Electric door control commands are commands that control the opening of electric doors. The central controller generates electric door control commands and sends them to the electric door drive unit. Subsequently, the door drive motor and transmission mechanism drive the electric door to move at the desired speed to achieve synchronous operation of mold opening and electric door opening.

[0046] Synchronous display command refers to the command that controls the human-computer interaction interface to display theoretical coefficients, which can display the theoretical coefficients to the staff in real time.

[0047] Based on the real-time position of the template, the motion stage of the template is determined. Then, theoretical coefficients are retrieved according to the motion stage to determine the desired speed of the electric gate. The electric gate is then controlled to operate according to the desired speed, so that the speed of the electric gate and the speed of the template are dynamically matched, thereby improving the accuracy of the electric gate speed control.

[0048] Methods for determining theoretical coefficients also include: Step 301: Retrieve the total template travel and total door travel from the travel parameters.

[0049] The total travel of the template refers to the total distance the template moves during the mold opening and part removal process, while the total travel of the door refers to the total distance the electric door moves during the mold opening and part removal process. Both can be read from the travel parameters.

[0050] Step 302: Determine the stroke ratio coefficient based on the total stroke of the template and the total stroke of the door, and determine the slow-opening coefficient according to the movement stage.

[0051] The stroke ratio coefficient refers to the ratio of the travel distance of the electric door and the template during the mold opening and part removal process. It can be calculated using the formula: stroke ratio coefficient = total door travel / total template travel.

[0052] The slow-opening coefficient refers to the adjustment coefficient of the electric door. The slow-opening coefficient corresponding to the movement stage can be found in the slow-opening coefficient correspondence table. The slow-opening coefficient correspondence table is a data table that records different movement stages and their corresponding slow-opening coefficients. In this embodiment, the slow-opening coefficient is 0.9 when the initial stage is slow, 1 when the middle stage is fast, and 0.8 when the final stage is slow.

[0053] The typical operating conditions for the mold opening action of a hydraulic injection molding machine are as follows: In the initial stage, when the speed is slow, the hydraulic system supplies oil at a small flow rate to prevent the mold plate from colliding. In the middle stage, when the speed is fast, the hydraulic system switches to a large flow rate to improve efficiency. In the final stage, when the speed is slow and the mold opening end point is approaching, the hydraulic system switches to a small flow rate to prevent the product from falling off or the mold from being damaged. Stage-by-stage control can eliminate the speed abrupt deviation during stage switching.

[0054] The staff made the electric gate run at 100% synchronous speed in each stage of the mold opening process. If the gate body was found to shake violently in each stage, the coefficient of that stage was gradually reduced until the operation was smooth. The actual coefficient of that stage was obtained, and the actual coefficient was matched with the operation stage to form a slow opening coefficient correspondence table.

[0055] Step 303: Determine the speed coefficient by combining the stroke ratio coefficient and the slow-opening coefficient.

[0056] The speed coefficient refers to the adjustment coefficient of the electric door speed. It can be the product of the stroke ratio coefficient and the slow-opening coefficient, and the speed coefficient is used as a new theoretical coefficient.

[0057] Step 304: Update the theoretical coefficients according to the velocity coefficients.

[0058] The template speed varies in each movement stage, which changes the fluctuation of the movement speed between the template and the electric gate. At this time, the stroke ratio coefficient is determined based on the total stroke of the template and the electric gate, and the speed coefficient is determined in combination with the movement stage, so as to correct the speed of the electric gate, so that the speed of the electric gate and the speed of the template are dynamically matched, thereby improving the accuracy of the speed control of the electric gate.

[0059] Methods for determining the desired speed also include: Step 401: Obtain the position of the switch and determine the progress deviation by combining the template position and the switch position.

[0060] The switch position refers to the real-time reading of the switch position gauge, which is collected in real time.

[0061] Schedule deviation refers to the difference between the actual position and the theoretical position of the template, which can be determined by referring to the schedule deviation determination method in steps 405 to 406 below.

[0062] Step 402: Determine the deviation coefficient based on the progress deviation.

[0063] The deviation coefficient refers to the coefficient used to adjust the operating speed of the ignition switch to ensure its safe operation. In this embodiment, when the progress deviation is negative 5, it indicates that the switch is ahead of schedule, and the speed of the ignition switch needs to be reduced. At this time, the deviation coefficient is 0.7. The deviation coefficient corresponding to the progress deviation can be found in the deviation coefficient correspondence table. The deviation coefficient correspondence table is a data table that records different progress deviations and their corresponding deviation coefficients. The human-machine interface is controlled to display the deviation coefficient and theoretical coefficient to the staff in real time.

[0064] Staff members artificially create different schedule deviations, and then test the preset candidate coefficients corresponding to each schedule deviation in turn. Taking the absence of collision risk and the smooth and rapid motor correction process as the standard, the most suitable deviation coefficients for each situation are selected. Finally, the schedule deviations and deviation coefficients are matched one by one and summarized into a deviation coefficient correspondence table.

[0065] Step 403: Update the synchronization display command based on the deviation coefficient, and calculate the product of the deviation coefficient and the desired speed as the adjustment speed.

[0066] Adjustment speed refers to the operating speed of the switch after safety correction. The product of the desired speed and the deviation coefficient can be used as the adjustment speed, and the adjustment speed can be used as the new desired speed.

[0067] Step 404: Update the desired speed according to the adjusted speed.

[0068] When the relative positions of the electric gate and the template fluctuate, safety hazards may arise. In this case, the progress deviation is calculated based on the real-time position of the template and the real-time position of the electric gate, thereby correcting the desired speed and improving the accuracy of the electric gate speed control.

[0069] Methods for calculating schedule deviations also include: Step 405: Calculate the quotient of the switch position and the theoretical coefficient as the template for calculation position.

[0070] The calculation position refers to the theoretical position of the template during calculation, which is used to calculate schedule deviations.

[0071] Step 406: Calculate the difference between the template position and the calculated position as the progress deviation.

[0072] Schedule deviation refers to the difference between the actual position and the theoretical position of the template, which can be calculated using the formula: Schedule Deviation = Template Position - Calculated Position.

[0073] During the mold opening and part removal process, mechanical reasons may cause the position of the electric door to be abnormal. At this time, the calculated position is determined based on the position of the electric door and the theoretical coefficient, and the progress deviation is determined in combination with the position of the template to show the actual position of the electric door.

[0074] Methods for determining the desired speed also include: Step 407: Determine the speed range based on the adjusted speed.

[0075] The speed range refers to the theoretical speed range during normal operation of the electric gate. In this embodiment, the maximum speed is 300 mm / s and the minimum speed is 80 mm / s.

[0076] Step 408: Determine the modified speed based on the adjusted speed and speed range.

[0077] The modified speed refers to the desired speed after speed adjustment. When the modified speed is greater than the maximum speed, the modified speed is set to the maximum speed. When the modified speed is less than the minimum speed, the modified speed is set to the minimum speed. When the modified speed is neither greater than the maximum speed nor less than the minimum speed, the modified speed is the desired speed, and the modified speed is used as the new desired speed.

[0078] Step 409: Update the desired speed according to the modified speed.

[0079] If the opening speed of the electric gate is too fast or too slow, it will pose a safety hazard. In this case, the desired speed range should be determined based on the template speed, and the desired speed should be adjusted to improve the accuracy of the electric gate speed control.

[0080] The optimization methods for theoretical coefficients include: Step 600: Determine the number of generation times based on the power switch control command.

[0081] The generation count refers to the number of times the mold is opened and the part is removed, which is the number of times the power control command is generated. The generation count is obtained by reading the power control command number from the central controller.

[0082] Step 601: When the number of generation times is consistent with the preset fitting period, retrieve historical data based on the fitting period.

[0083] The fitting period refers to the set of period numbers for coefficient optimization. In this embodiment, fitting is performed once every ten times, that is, the fitting period is 10, 20, 30...

[0084] When the number of generation times matches the fitting period, it indicates that long-term operation of the injection molding machine may cause fluctuations in the speed coefficient, thus requiring coefficient optimization.

[0085] Historical data refers to the historical template speed and door speed. The template speed and door speed corresponding to the tenth door control command based on the last door control command are read from the central controller as historical data. Door speed refers to the real-time speed of the electric door, which is collected in real time by the door position gauge.

[0086] Step 602: Determine the cumulative velocity and squared velocity based on the historical data.

[0087] Cumulative speed refers to the cumulative speed of the electric gate and the template, while square speed refers to the cumulative square of the template speed. Both are used to calculate the optimal coefficient. The calculation methods for cumulative speed and square speed are explained below.

[0088] Step 603: Determine the optimal coefficients based on the cumulative velocity and the square velocity.

[0089] The optimal coefficient refers to the adjusted speed relationship coefficient between the electric gate and the template. It is used to correct the theoretical coefficient of the electric gate and to take the optimal coefficient as the new theoretical coefficient. The calculation method of the optimal coefficient is explained below.

[0090] Step 604: Update the theoretical coefficients according to the optimal coefficients.

[0091] After long-term operation, the transmission characteristics of injection molding machines may change due to different mold loads or mechanical wear, which may lead to fluctuations in the speed coefficient. In this case, historical data is retrieved according to the fitting period, and the speed coefficient is corrected based on the historical data to improve the accuracy of electric door speed control.

[0092] The methods for calculating the optimal coefficients include: Step 605: Determine the historical switch speed and historical template speed based on the historical data.

[0093] Historical gate speed refers to the gate speed within a cycle. The gate speed can be read from historical data as the historical gate speed.

[0094] Historical template speed refers to the template speed within a period. The template speed in historical data can be read as the historical template speed.

[0095] Historical template speed and historical gate speed refer to the template speed and gate speed used to generate a gate control command. There is a one-to-one correspondence between historical template speed and historical gate speed.

[0096] Step 606: Calculate the product of the historical gate speed and the historical template speed, accumulate them to determine the cumulative speed, and accumulate the squares of the historical template speed to determine the square speed.

[0097] The cumulative speed refers to the cumulative value of the product of the gate speed and the template speed. A set of historical template speeds and historical gate speeds are calculated as the calculation speed, and the sum of all calculated speeds is used as the cumulative speed. In this embodiment, the number of calculation speeds is 10, which is used to calculate the optimal coefficient.

[0098] The squared velocity refers to the cumulative value of the squares of the template velocity. The square of a historical template velocity is calculated as the calculated square, and the sum of all calculated squares is taken as the squared velocity. In this embodiment, the number of calculated squares is 10, which is used to calculate the optimal coefficient.

[0099] Step 607: Calculate the quotient of the cumulative velocity and the square velocity to determine the optimal coefficient.

[0100] The optimal coefficient refers to the speed relationship coefficient between the adjusted electric gate and the template. The quotient of the cumulative speed and the square speed is taken as the optimal coefficient.

[0101] The optimal coefficient is determined by summing the products of all electric gate speeds and template speeds within a cycle and combining them with the sum of the squares of all template speeds. This corrects the operating speed of the electric gate and improves the accuracy of electric gate speed control.

[0102] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0103] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for synchronously controlling the electric door and mold opening action of an injection molding machine, characterized in that, include: Step 100: Obtain template position and template speed; Step 200: Determine the motion stage based on the template position and preset stroke parameters; Step 300: Determine the theoretical coefficients according to the described motion stage; Step 400: Determine the desired velocity by combining the template velocity and the theoretical coefficients; Step 500: Generate throttle control instructions and synchronization display instructions according to the desired speed.

2. The method for synchronously controlling the electric door and mold opening action of an injection molding machine according to claim 1, characterized in that, The method for determining the theoretical coefficients also includes: Step 301: Retrieve the total template travel and total door travel from the travel parameters; Step 302: Determine the stroke ratio coefficient based on the total travel of the template and the total travel of the door, and determine the slow-opening coefficient according to the movement stage; Step 303: Determine the speed coefficient by combining the stroke ratio coefficient and the gradual opening coefficient; Step 304: Update the theoretical coefficients according to the velocity coefficients.

3. The method for synchronously controlling the electric door and mold opening action of an injection molding machine according to claim 1, characterized in that, The method for determining the desired speed also includes: Step 401: Obtain the position of the ignition switch, and determine the progress deviation by combining the template position and the ignition switch position; Step 402: Determine the deviation coefficient based on the schedule deviation; Step 403: Update the synchronization display command based on the deviation coefficient, and calculate the product of the deviation coefficient and the desired speed as the adjustment speed; Step 404: Update the desired speed according to the adjusted speed.

4. The method for synchronously controlling the electric door and mold opening action of an injection molding machine according to claim 3, characterized in that, The method for calculating the schedule deviation also includes: Step 405: Calculate the quotient of the switch position and the theoretical coefficient as the calculation position of the template; Step 406: Calculate the difference between the template position and the calculated position as the progress deviation.

5. The method for synchronously controlling the electric door and mold opening action of an injection molding machine according to claim 4, characterized in that, The method for determining the desired speed also includes: Step 407: Determine the speed range based on the adjusted speed; Step 408: Determine the modified speed based on the adjusted speed and speed range; Step 409: Update the desired speed according to the modified speed.

6. The method for synchronously controlling the electric door and mold opening action of an injection molding machine according to claim 1, characterized in that, The optimization methods for the theoretical coefficients include: Step 600: Determine the number of generation times based on the power switch control command; Step 601: When the number of generation times matches the preset fitting period, retrieve historical data based on the fitting period; Step 602: Determine the cumulative velocity and squared velocity based on the historical data; Step 603: Determine the optimal coefficients based on the cumulative velocity and the squared velocity; Step 604: Update the theoretical coefficients according to the optimal coefficients.

7. The method for synchronously controlling the electric door and mold opening action of an injection molding machine according to claim 6, characterized in that, The method for calculating the optimal coefficient includes: Step 605: Determine the historical switch speed and historical template speed based on the historical data; Step 606: Calculate the product of the historical gate speed and the historical template speed, accumulate them to determine the cumulative speed, and accumulate the squares of the historical template speed to determine the square speed; Step 607: Calculate the quotient of the cumulative velocity and the square velocity to determine the optimal coefficient.

8. A synchronous control system for the electric door and mold opening action of an injection molding machine, characterized in that, include: The mold opening unit is used to collect the mold position and speed in real time. The electric door drive unit is used to collect the electric door's position and speed in real time. A central controller is used to store and process a program for a synchronous control method of electric door and mold opening action of an injection molding machine as described in any one of claims 1 to 7; The human-machine interface is used to display the human-machine interface for staff to input travel parameters, and to display the progress deviation and speed coefficient.

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