A method and system for controlling hydraulic locking of a movable platen and injection molding machine

Abstract

The application discloses a control method and system of hydraulic locking in a movable mold plate and an injection molding machine. The control method comprises the following high-pressure locking steps: in response to a high-pressure locking signal, the current state of the rotary shutter is obtained and determined to be an open state, the rotary shutter is driven to rotate, the open state is switched to a closed state, the hydraulic operation in the movable mold plate is driven, when the push rod is pressed on the rotary shutter, the movable mold plate is reversely pushed towards the mold direction with the push rod as the support and / or an acting force is generated, the real-time locking force value of the current locking force is obtained when the hydraulic acting force is continuously increased, and when the real-time locking force value meets the required locking force parameter, the current hydraulic operation is maintained to perform high-pressure locking. The application controls the state switching of the rotary shutter, provides hydraulic action under the locking cylinder of the movable mold plate, takes the push rod as the support, and directly converts the hydraulic acting force in the movable mold plate into the locking force applied to the mold.

Description

Technical Field

[0001] The present invention relates to the technical field of process control of injection molding production, in particular to a control method and system utilizing hydraulic mold locking in a movable mold plate and an injection molding machine. Background Art

[0002] With the increasing variety of plastic products, the requirements for injection molding processing are also constantly improving. Therefore, the control process of injection molding equipment during the injection molding process is particularly important. In the existing technology, the injection molding machine adopts a toggle mechanism in the clamping process. The toggle clamping mechanism is the most commonly used clamping mechanism on small and medium-sized injection molding machines. Its structural feature (double toggle) is that it consists of a clamping cylinder and two symmetrical toggle side rod mechanisms. When clamping, the high-pressure oil in the mold transfer cylinder pushes the crosshead to straighten the toggle connecting rod, and the system produces elastic deformation to achieve the clamping force.

[0003] However, the stress state of the toggle-type clamping mechanism is not ideal. Since the clamping force is mainly obtained by the deformation of the pull rod, if the pull rod is too thick and the rigidity is too high, the force increase curve will rise too steeply and change too sensitively at the closing point, making mold adjustment difficult, or the clamping force is insufficient. After long-term use, the mechanical parts of the toggle-type clamping device, such as the coring column and the bearing seat, may cause the clamping force to decrease due to wear, or the clamping force may be too high, causing damage to the pull rod, pull rod nut, template or toggle pin; and due to the use of a double toggle form, the clamping stroke design is limited (the maximum stroke is when the toggle is straight), which is difficult to apply to large-scale injection molding equipment or injection molding equipment that requires a longer stroke.

[0004] Based on the above situation, the inventors have developed a new clamping control process that uses the hydraulic pressure inside the movable platen to provide the clamping force to replace the entire toggle-type clamping mechanism. The entire toggle-type clamping component between the rear platen and the movable platen is eliminated, and the push rod + hydraulic form is used to push the movable platen to achieve clamping. Summary of the Invention

[0005] In response to one or more of the above problems, the present invention provides a control method and system and an injection molding machine that utilize hydraulic clamping in a movable platen. By controlling the state switching of a rotary gate, the rotary gate can be used to block, lock or open the limiting hole where the push rod is located without affecting the displacement of the push rod. Under the hydraulic action provided by the clamping cylinder of the movable platen, with the push rod as the support, the movable platen utilizes the hydraulic force in the platen to directly convert it into a clamping force applied to the mold.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a control method utilizing hydraulic clamping in a movable platen, comprising the following high-pressure clamping steps:

[0007] In response to the high-pressure clamping signal, the current state of the rotary shutter is obtained and determined to be an open state, the rotary shutter is driven to rotate, and the open state is switched to a closed state to block the push rod arranged on the movable die plate and subjected to the hydraulic action in the movable die plate;

[0008] The required clamping force parameter of the current mold is obtained, the required clamping force parameter is pre-set, the hydraulic operation in the movable die plate is driven according to the required clamping force parameter of the current mold, and the clamping cylinder of the movable die plate pushes the push rod under the hydraulic action force;

[0009] When the push rod is pressed against the rotary shutter, the movable die plate is reversely pushed towards the mold direction and / or an acting force is generated, and the hydraulic action force is converted into the clamping force applied to the mold;

[0010] The real-time clamping force value of the current clamping force is obtained when the hydraulic action force is continuously increased, and when the real-time clamping force value meets the required clamping force parameter, the current hydraulic operation is maintained to perform high-pressure clamping.

[0011] As a further improvement of the present application, the control method further comprises the following clamping steps:

[0012] The current state of the rotary shutter is obtained and determined to be an open state;

[0013] The moving die oil cylinder on the tail plate is controlled to pull the movable die plate at a rapid clamping parameter to perform rapid clamping, and the clamping parameter is pre-set and includes a first pressure parameter, a first speed parameter and a position parameter;

[0014] After the movable die plate reaches the position set by the position parameter, low-pressure clamping is performed, and the die plate is pulled at a low-pressure clamping parameter to perform low-pressure clamping, and the low-pressure clamping parameter is pre-set and includes a second pressure parameter and a second speed parameter;

[0015] The real-time clamping force value is obtained, wherein the real-time clamping force value is obtained by a clamping force sensor on the clamping rod, and when the real-time clamping force value increases to a high-pressure clamping starting point, a high-pressure clamping signal is generated, and the high-pressure clamping starting point is a pre-set clamping force threshold.

[0016] As a further improvement of the present application, the rotary shutter is driven to rotate, which comprises:

[0017] The state signal of the position sensor arranged on the rotary shutter is obtained, and the current state is determined to be an open state;

[0018] The shutter oil cylinder of the rotary shutter is driven to rotate the rotary shutter plate body;

[0019] Obtain the status signal of the position sensor of the rotating gate. When the rotating plate body rotates to overlap with the fixed plate body under the drive of the gate cylinder, the outer contours of the rotating plate body and the fixed plate body overlap, and the status signal is in the closed state. When in the closed state, the rotating plate body blocks the upper limit hole of the fixed plate body, so that the push rod is under constant pressure on the rotating plate body and cannot retreat when subjected to hydraulic force, thereby forming support.

[0020] As a further improvement of the present invention, the fixed plate body is provided with a limiting hole for connecting the push rod, the side wall of the rotating plate body is concave to form an avoidance position, and the avoidance position completely avoids the limiting hole when rotated to coincide with the limiting hole without interfering with the displacement of the push rod, and the position sensor includes a first sensor provided on the fixed plate body and a second sensor provided on the rotating plate body;

[0021] The first sensor is located on the outside of the fixed plate body corresponding to the avoidance position of the rotating plate body, and the contour of the fixed plate body corresponding to the avoidance position is the same as the contour of the avoidance position of the rotating plate body. The first sensor is used to sense whether the rotating plate body rotates and convex. If so, it indicates that the rotating plate body is in an open state or not completely closed, and the obtained state signal is an open state;

[0022] The second sensor is located on the rotating plate body and at the outer contour segment of the fixed plate body corresponding to the limiting hole position. The second sensor is used to sense whether the outer contour segment of the fixed plate body corresponding to the limiting hole position is in place. If so, it indicates that the rotating plate body is in a fully closed state, and the obtained status signal is a closed state.

[0023] As a further improvement of the present invention, the method of driving the hydraulic operation in the movable platen according to the clamping force parameters required by the current mold includes:

[0024] When the rotary gate is determined to be in the closed state, the hydraulic operation is driven to deliver the set pressure and flow to the rodless cavity of the clamping cylinder of the movable platen, wherein the set pressure and flow are set according to the clamping force parameters required by the current mold;

[0025] The pressure inside the rodless chamber of the clamping cylinder increases, pushing the piston and the push rod connected to the piston toward the rotating gate.

[0026] As a further improvement of the present invention, the method of using the push rod as support to push the movable platen in the opposite direction toward the mold and / or generating a force includes:

[0027] When the push rod presses against the rotary gate, since the rotary gate is in a closed state, the push rod cannot move and forms a support;

[0028] The control method of the application further comprises the following steps of controlling the continuous oil injection of the clamp cylinder, fixing the piston and the push rod in the clamp cylinder, and starting the reverse movement of the clamp cylinder towards the mold direction, so as to drive the movable die plate to move and close the mold;

[0029] After the mold is closed, the hydraulic force is converted into the clamping force applied to the mold;

[0030] The real-time value of the current clamping force is obtained, and when the real-time value meets the required clamping force parameter, the current hydraulic operation is maintained, the hydraulic operation is switched to the pressure maintaining mode, and the pressure in the clamp cylinder is maintained for high-pressure clamping.

[0031] As a further improvement of the application, the control method further comprises the following mold opening steps:

[0032] The mold opening signal is received, the rodless cavity of the clamp cylinder is controlled to be depressurized, and the hydraulic reset is performed by the oil injection of the rod cavity of the clamp cylinder;

[0033] During the hydraulic reset, the piston drives the push rod to compress the rodless cavity space, so that the push rod is displaced away from the rotary shutter direction;

[0034] After the hydraulic reset, the push rod is separated from the rotary plate body, and the rotary shutter is driven to switch to the open state;

[0035] The state signal of the position sensor is obtained, and the current state is determined to be the open state, the clamp cylinder on the tail plate is controlled to pull the movable die plate to open the mold, and during the mold opening process, the end of the push rod passes through the avoidance position of the rotary plate body from the limiting hole of the fixed plate body and enters the through hole of the tail plate for retreat.

[0036] On the other hand, the application also provides the following technical solution: an injection molding control system for realizing the control method of the movable die plate hydraulic clamping as described above, comprising:

[0037] The shutter control unit is used to drive the rotation of the rotary shutter and switch between the open state and the closed state;

[0038] The clamping unit is used to drive the hydraulic operation in the movable die plate, and the clamp cylinder of the movable die plate pushes the push rod under the hydraulic force, and when the push rod presses the rotary shutter, the movable die plate is reversely pushed towards the mold direction with the push rod as the support and / or generates the force, so as to convert the hydraulic force into the clamping force applied to the mold;

[0039] The clamping force judgment unit is used to obtain the real-time value of the current clamping force, and when the real-time value meets the required clamping force parameter, the current hydraulic operation is maintained by the clamping unit for high-pressure clamping.

[0040] In another aspect, the present application also provides the following technical solutions: an injection molding machine comprising a memory and a processor, the processor calling a control program stored in the memory to execute the control method for utilizing hydraulic mold locking in a movable mold plate as described above.

[0041] In another aspect, the present application also provides the following technical solutions: a computer readable storage medium storing a computer program, the computer program causing a processor to execute the control method for utilizing hydraulic mold locking in a movable mold plate when executed by the processor.

[0042] Compared with the prior art, the present application has the following beneficial effects:

[0043] The present application realizes the plugging and locking of the limiting hole of the push rod by the rotary gate or the opening without affecting the displacement of the push rod by controlling the state switching of the rotary gate; under the hydraulic action of the mold locking cylinder of the movable mold plate, the movable mold plate is supported by the push rod, so that the hydraulic force in the plate is directly converted into the mold locking force applied to the mold.

[0044] The present application uses the straight rod body of the push rod as support, and the end of the push rod is very stable and reliable when pressing on the rotary plate body, and the stability and reliability are comparable to the elastic deformation performance of the toggle lever in the traditional scheme. Moreover, the hydraulic force is more direct in transmission, and the hydraulic force in the movable mold plate is converted into the mold locking force applied to the mold, which eliminates the process of transmitting the hydraulic power output by the tail plate in the traditional injection molding machine through the toggle lever structure, and solves the problems of limited toggle lever stroke and mechanical wear and tear in the traditional injection molding machine. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 The flowchart of the embodiment of the present application.

[0047] Figure 2 The structure diagram of the movable mold plate and the rotary gate of the embodiment of the present application.

[0048] Figure 3 The structure diagram of the movable mold plate of the embodiment of the present application.

[0049] Figure 4 The structure diagram of the rotary gate of the embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to clearly and completely understand the technical solutions, the present application will be further described in conjunction with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present application, and all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0051] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0052] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0053] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0054] Embodiments of the present application provide a control method for hydraulic locking of a movable die plate, as shown in Figure 1 The high-pressure locking step includes:

[0055] S101, in response to the high-pressure locking signal, obtaining the current state of the rotating shutter and determining that the current state is an open state;

[0056] S102, driving the rotating shutter to rotate and switch the open state to a closed state, for blocking the push rod arranged on the movable die plate and subjected to the hydraulic pressure in the movable die plate;

[0057] S103, obtaining the required locking force parameter of the current mold, the required locking force parameter being pre-set, driving the hydraulic pressure in the movable die plate to operate according to the required locking force parameter of the current mold, and the locking cylinder of the movable die plate pushing the push rod under the hydraulic pressure;

[0058] S104, when the push rod is pressed against the rotating shutter, the movable die plate is reversely pushed towards the mold direction and / or generates an acting force with the push rod as support, and the hydraulic pressure is converted into the locking force applied to the mold;

[0059] S105, obtaining the real-time locking force value of the current locking force when the hydraulic pressure is continuously increased, and the real-time locking force value is monitored by a locking force sensor.

[0060] S106, when the real-time clamping force value meets the required clamping force parameter, maintain the current hydraulic operation to carry out high-pressure clamping.

[0061] Through the above steps, the hydraulic pressure in the movable die plate is converted into clamping force, which is more direct and reliable. The straight rod body of the push rod is used as support, one end of which is fixedly connected with the piston, and the other end is pressed on the rotating gate plate. The rotating gate plate is arranged close to the tail plate. Therefore, the end of the push rod pressed on the rotating plate body is very stable and reliable. The stability and reliability are comparable to the elastic deformation performance of the toggle lever in the traditional scheme. Moreover, the hydraulic force is more direct in transmission. The hydraulic force in the movable die plate is converted into the clamping force applied to the mold, eliminating the process of transmitting the hydraulic power output from the tail plate through the toggle lever structure in the traditional injection molding machine, and solving the problems of limited toggle lever stroke and mechanical wear and tear in the traditional injection molding machine.

[0062] In order to better understand the above steps, the structure of the movable die plate and the rotating gate plate is further described in this embodiment, as shown in Figure 2-3 As shown in the figure, the movable die plate 100 is provided with a plurality of clamping oil cylinders 110. The clamping oil cylinder is an integral part of the movable die plate and is processed as a whole, rather than externally arranged. Further, the hydraulic oil inlet pipeline of the clamping oil cylinder is input through one side of the movable die plate 100 (through the hydraulic integrated valve group 120 arranged on one side of the movable die plate), and the plate-in pipeline in the movable die plate 100 is in communication with the rodless cavity of the clamping oil cylinder 110. Meanwhile, the rod cavity of the clamping oil cylinder is connected with the hydraulic integrated valve group 120 through an oil pipe for hydraulic reset.

[0063] It should be noted that the clamping oil cylinder has a piston, and the piston is connected with the push rod to divide the cylinder into a rodless cavity (one side of the cylinder bottom) and a rod cavity (one side of the cylinder top). This embodiment does not make too much description on the structure in the clamping oil cylinder, including the oil seal between the piston and the cylinder wall, the oil seal between the push rod and the cylinder cover, etc. The existing technology can be used to obtain. Meanwhile, this embodiment does not make any form of limitation on the control of the hydraulic system or the implementation mode of the hydraulic action. The skilled person can set it according to the actual use requirement, and the existing technology can be used to realize the input and control of the hydraulic operation in the movable die plate through the hydraulic control system.

[0064] Further, the piston of the clamping oil cylinder 110 is fixedly connected with the push rod 130. When the hydraulic operation is performed, the oil is fed to the rodless cavity, so that the piston and the push rod move. At this time, the push rod is fixed by the rotating gate plate 200, so that the clamping oil cylinder can be supported by the push rod, and the movable die plate moves towards the mold and / or outputs the hydraulic action.

[0065] The structure of the rotating gate plate is further described as follows, Figure 2 and4 As shown, the rotary gate is arranged on the tail plate 300, and the rotary gate comprises a fixed plate body 210, a rotary plate body 220 and a gate oil cylinder 230. The fixed plate body 210 is provided with a limiting hole 211 for connecting the push rod, that is, the push rod can be displaced along the hole axis direction in the limiting hole. The rotation of the rotary plate body is controlled by the gate oil cylinder, so that the rotary plate body can block the limiting hole for limiting or fixing the push rod, or can open the limiting hole to allow the push rod to be displaced in the limiting hole without interference.

[0066] In this embodiment, by controlling the state switching of the rotary gate, the rotary gate can block or open the limiting hole in which the push rod is located without affecting the displacement of the push rod. Under the action of the hydraulic pressure of the locking oil cylinder of the movable die plate, the movable die plate is supported by the push rod, so that the locking force of the mold is directly converted from the in-plate hydraulic force.

[0067] For better illustration, in an optional embodiment, the control method further comprises the following clamping steps:

[0068] obtaining the current state of the rotary gate and determining that the current state is an open state;

[0069] controlling the moving oil cylinder on the tail plate to pull the movable die plate at a rapid clamping parameter to perform rapid clamping, the clamping parameter being pre-set and including a first pressure parameter, a first speed parameter and a position parameter;

[0070] performing low-pressure clamping after the movable die plate reaches the position set by the position parameter, and pulling the die plate at a low-pressure clamping parameter to perform low-pressure clamping, the low-pressure clamping parameter being pre-set and including a second pressure parameter and a second speed parameter;

[0071] obtaining a real-time locking force value, wherein the real-time locking force value is obtained by a locking force sensor on the locking pull rod, and when the real-time locking force value increases to a high-pressure locking starting point, a high-pressure locking signal is generated, the high-pressure locking starting point being a pre-set locking force threshold.

[0072] Generally, before the high-pressure locking step, there are also rapid clamping steps and low-pressure clamping steps. In the present application, the clamping parameters are pre-set, and the present embodiment does not limit the specific parameter setting in any form. The specific parameter setting is determined according to different injection molding machines, different molds, different product requirements and other factors. The technical personnel can set the corresponding clamping parameters according to the actual use requirements.

[0073] For example, the initial setting value of the initial clamping pressure is usually 25. If the pressure is too small, the speed is too slow, and the pressure can be increased by +5 each time for testing. The clamping speed should be set according to the actual situation, and should not be too fast to ensure the continuity of the action and avoid obvious pause action switching. Ideally, the speed setting should be high and the pressure setting should be low, and the speed is controlled by the pressure. Similarly, in low-pressure clamping, the low-pressure clamping speed should be slow. Even if the low pressure is set, the speed is too fast and the inertia may cause a huge impact damage. When encountering unexpected hard obstacles, the low-pressure and slow-speed clamping protection parameters can greatly reduce the impact damage. The pressure control can set the speed to tens at the beginning, then keep it unchanged, and test the pressure by setting it very low (for example, 5). Gradually increase the pressure to the appropriate clamping protection speed.

[0074] In this embodiment, after fast clamping and low-pressure clamping, the real-time clamping force value is obtained. When the real-time clamping force value increases to the clamping high-pressure starting point, a high-pressure clamping signal is generated. The clamping high-pressure starting point is a pre-set clamping force threshold.

[0075] In an optional embodiment, the driving of the rotating gate plate to rotate includes:

[0076] The state signal of the position sensor arranged on the rotating gate plate is obtained, and the current state is determined to be an open state;

[0077] The gate plate cylinder of the rotating gate plate is driven, so that the rotating plate body of the rotating gate plate rotates;

[0078] The state signal of the position sensor of the rotating gate plate is obtained. When the rotating plate body rotates to coincide with the fixed plate body under the driving of the gate plate cylinder, the outer contour of the rotating plate body coincides with that of the fixed plate body. The state signal is in a closed state. When the state signal is in the closed state, the rotating plate body blocks the limiting hole on the fixed plate body, so that the push rod is fixed and supported under the action of the hydraulic force.

[0079] In order to better understand that the limiting of the push rod by the rotating gate plate enables the push rod to be fixed and supported, in an optional embodiment, the fixed plate body 210 is provided with a limiting hole for connecting the push rod. The side wall of the rotating plate body is concave to form an avoidance position, and the avoidance position completely avoids the limiting hole without interfering with the displacement of the push rod when rotating to coincide with the limiting hole. The position sensor includes a first sensor 212 arranged on the fixed plate body 210 and a second sensor 221 arranged on the rotating plate body 220, as shown in Figure 4 ;

[0080] The first sensor is located outside the fixed plate body corresponding to the avoidance position of the rotating plate body, and the profile of the avoidance position of the fixed plate body is the same as that of the rotating plate body. The first sensor is used to sense whether the rotating plate body is protruding, and if so, it indicates that the rotating plate body is in an open state or an incomplete closing state. The state signal obtained is an open state, as shown in Figure 4 The rotating plate body 220 and the fixed plate body 210 are staggered as shown in the figure.

[0081] The second sensor is located on the rotating plate body and located on the fixed plate body outside the profile segment corresponding to the limiting hole position. The second sensor is used to sense whether the fixed plate body outside the profile segment corresponding to the limiting hole position is in place, and if so, it indicates that the rotating plate body is in a completely closed state. The state signal obtained is a closed state, as shown in Figure 2 The rotating plate body 220 and the fixed plate body 210 are coincident as shown in the figure.

[0082] As can be understood by those skilled in the art, the first sensor and the second sensor are used to monitor whether the rotating shutter is in an open state or a closed state. Based on this purpose, the signal acquisition of the opening and closing of the limiting hole can also be realized by the signals obtained by the two sensors together, or other monitoring forms can be used, such as monitoring the opening or closing state of the limiting hole by setting a monitoring sensor in the limiting hole.

[0083] In an optional embodiment, the hydraulic operation of the movable die plate is driven according to the current mold locking force parameter required by the mold, which includes:

[0084] When it is determined that the rotating shutter is in a closed state, the hydraulic operation is driven to deliver the locking oil cylinder of the movable die plate to the rodless cavity at a set pressure and flow rate, wherein the set pressure and flow rate are set according to the current mold locking force parameter required by the mold;

[0085] The pressure inside the rodless cavity of the locking oil cylinder increases, pushing the piston and the push rod connected to the piston towards the rotating shutter.

[0086] When the push rod presses on the rotating shutter, the push rod cannot move to form a support because the rotating shutter is in a closed state;

[0087] The locking oil cylinder is controlled to continue to inject oil, and at this time the piston and the push rod in the locking oil cylinder are fixed, and the locking oil cylinder starts to move reversely towards the mold direction, so as to make the movable die plate move to push the mold to close;

[0088] After the mold is closed, the hydraulic force is converted into the mold locking force applied to the mold;

[0089] The real-time clamping force value of the current clamping force is obtained, when the real-time clamping force value meets the required clamping force parameter, the current hydraulic operation is maintained, the hydraulic operation is switched to the pressure maintaining mode, and the pressure in the clamping cylinder is maintained to perform high-pressure clamping.

[0090] In an optional embodiment, the control method further comprises the following mold opening step:

[0091] After injection molding, a clamping pressure relief signal is received, the rodless cavity of the clamping cylinder is controlled to relieve pressure, and the hydraulic reset is performed by oil feeding through the rod cavity of the clamping cylinder;

[0092] During the hydraulic reset, the piston drives the push rod to compress the rodless cavity space, so that the push rod is displaced away from the rotating shutter direction;

[0093] After the hydraulic reset, the push rod is separated from the rotating plate body, and the rotating shutter is driven to switch to the open state;

[0094] The state signal of the position sensor is obtained, and the current state is determined to be the open state, the moving die plate is pulled to open the mold by the ejector cylinder on the tail plate, and during the mold opening process, the end of the push rod passes through the clearance of the rotating plate body from the limiting hole of the fixed plate body and enters the through hole of the tail plate to retreat.

[0095] Obviously, the above embodiments are only used to illustrate the steps of the control method of the present application, and are not intended to limit the protection scope of the present application. Without deviating from the concept of the present application, those skilled in the art can adjust the above method steps, so that the present application can be applied to more specific application scenarios.

[0096] On the other hand, in the embodiments of the present application, an injection control system is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. As used below, the term "module" "unit" can be a combination of software and / or hardware that implements a predetermined function. Although the device units described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware is also possible and contemplated. The present embodiment provides an injection control system for implementing a control method for hydraulic clamping in a moving die plate as described in one or more optional embodiments above, comprising:

[0097] The shutter control unit is used to drive the rotation of the rotating shutter, and switch between the open state and the closed state;

[0098] The clamping unit is used to drive the hydraulic operation in the moving die plate, and the clamping cylinder of the moving die plate pushes the push rod under the action of hydraulic force, and when the push rod presses on the rotating shutter, the push rod is used as a support to push the moving die plate towards the mold direction and / or generate an action force, and the hydraulic force is converted into a clamping force applied to the mold.

[0099] The mold clamping force judging unit is configured to obtain a real-time value of the current mold clamping force, and when the real-time value meets the required mold clamping force parameter, the current hydraulic operation is maintained to perform high-pressure mold clamping by the mold clamping unit.

[0100] It should be noted that each of the above modules or units can be implemented by software or hardware, and for the latter, the following implementation manners can be used, but are not limited thereto: all the above modules or units are located in the same processor; or the above modules or units are located in different processors in any combination

[0101] In another aspect, the present application also provides another embodiment: an injection molding machine comprising a memory and a processor, wherein the processor is configured to execute a control method for using the hydraulic mold clamping in the movable mold plate by calling the control program stored in the memory.

[0102] Optionally, in the present embodiment, the processor can be configured to execute the following steps by the control program:

[0103] S101, in response to the high-pressure mold clamping signal, obtaining the current state of the rotating gate plate and determining that the current state is the open state;

[0104] S102, driving the rotating gate plate to rotate to switch the open state to the closed state, so as to block the push rod arranged on the movable mold plate and subjected to the hydraulic action in the movable mold plate;

[0105] S103, obtaining the required mold clamping force parameter of the current mold, the required mold clamping force parameter being pre-set, driving the hydraulic operation in the movable mold plate according to the required mold clamping force parameter of the current mold, and the mold clamping cylinder of the movable mold plate pushing the push rod under the hydraulic action force;

[0106] S104, when the push rod is pressed against the rotating gate plate, reversely pushing the movable mold plate towards the mold direction and / or generating an action force to convert the hydraulic action force into the mold clamping force applied to the mold, with the push rod as the support;

[0107] S105, obtaining the real-time mold clamping force value of the current mold clamping force when the hydraulic action force is continuously increased, and the real-time mold clamping force value is monitored by the mold clamping force sensor;

[0108] S106, when the real-time mold clamping force value meets the required mold clamping force parameter, maintaining the current hydraulic operation to perform high-pressure mold clamping.

[0109] Optionally, the specific examples in the present embodiment can refer to the examples described in the above embodiments and optional implementation manners, and the present embodiment will not be described here.

[0110] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In the alternative, the processor and the storage medium can reside as discrete components in a user terminal.

[0111] In another aspect, the present application also provides another embodiment: a computer readable storage medium, the computer readable storage medium stores a computer program, the computer program, when executed by a processor, causes the processor to perform a control method of using hydraulic locking in a movable die plate as described in one or more optional embodiments above.

[0112] Optionally, in the present embodiment, the above-mentioned storage medium can be configured to store a computer program for performing the following steps:

[0113] S101, in response to the high-pressure locking signal, acquiring the current state of the rotating shutter and determining that the current state is an open state;

[0114] S102, driving the rotating shutter to rotate and switch the open state to a closed state, for blocking the push rod arranged on the movable die plate and subjected to the hydraulic action in the movable die plate;

[0115] S103, acquiring the required locking force parameter of the current mold, the required locking force parameter being pre-set, driving the hydraulic operation in the movable die plate according to the required locking force parameter of the current mold, and the locking cylinder of the movable die plate pushing the push rod under the hydraulic action force;

[0116] S104, when the push rod is pressed against the rotating shutter, reversely pushing the movable die plate towards the mold direction and / or generating an action force to convert the hydraulic action force into the locking force applied to the mold, with the push rod as the support;

[0117] S105, acquiring the real-time locking force value of the current locking force while continuously increasing the hydraulic action force, the real-time locking force value being monitored by a locking force sensor;

[0118] S106, when the real-time locking force value meets the required locking force parameter, maintaining the current hydraulic operation to perform high-pressure locking.

[0119] Optionally, the specific examples in the embodiment can refer to the examples described in the above embodiments and optional implementation manners, and the embodiment will not be described here.

[0120] Optionally, in the embodiment, the storage medium can include but is not limited to a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various storage media that can store computer programs.

[0121] Computer readable storage media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer readable medium.

[0122] The above disclosure is only one or more of the preferred embodiments of the present application, which is used to help understand the inventive concept of the technical solution, and is not intended to limit the present application in other forms, and the skilled person in the art can make other equivalent or conventional means of replacement scheme according to the limited features of the present application, which still belongs to the scope covered by the present application.

Claims

1. A control method using hydraulic clamping in a movable platen, characterized in that: The high-pressure clamping steps include the following: In response to the high-pressure clamping signal, the current state of the rotary gate is obtained and determined to be the open state, the rotary gate is driven to rotate, and the open state is switched to the closed state, so as to block the push rod provided on the movable platen and acted upon by the hydraulic pressure in the movable platen; Obtaining the clamping force parameters required by the current mold, which are preset, and driving the hydraulic operation in the movable platen according to the clamping force parameters required by the current mold, so that the clamping cylinder of the movable platen pushes the push rod under the hydraulic force; When the push rod presses against the rotary gate, the push rod is used as a support to push the movable plate in the opposite direction toward the mold and / or generate a force, thereby converting the hydraulic force into a clamping force applied to the mold; The real-time clamping force value of the current clamping force is obtained while the hydraulic force is continuously increased. When the real-time clamping force value meets the required clamping force parameter, the current hydraulic operation is maintained to perform high-pressure clamping. The following mold closing steps are also included: Obtain the current state of the rotary gate and determine that the current state is an open state; Controlling the mold-moving oil cylinder on the tail plate to pull the movable platen to quickly close the mold according to the rapid mold closing parameters, wherein the mold closing parameters are pre-set and include a first pressure parameter, a first speed parameter, and a position parameter; After the movable die plate reaches the position set by the position parameters, low-pressure mold closing is performed, and the die plate is pulled to perform low-pressure mold closing according to the low-pressure mold closing parameters, wherein the low-pressure mold closing parameters are pre-set and include a second pressure parameter and a second speed parameter; The real-time clamping force value is obtained, wherein the real-time clamping force value is obtained by the clamping force sensor on the clamping rod. When the real-time clamping force value increases to the high-pressure point of the clamping, a high-pressure clamping signal is generated. The high-pressure point of the clamping is a preset clamping force threshold.

2. A control method using hydraulic clamping in a movable platen according to claim 1, characterized in that: The driving of the rotary gate to rotate comprises: Obtaining a status signal of a position sensor provided on the rotary gate to determine that the current state is an open state; Driving the gate oil cylinder of the rotary gate to rotate the rotating plate body of the rotary gate; Obtain the status signal of the position sensor of the rotating gate. When the rotating plate body rotates to overlap with the fixed plate body under the drive of the gate cylinder, the outer contours of the rotating plate body and the fixed plate body overlap, and the status signal is in the closed state. When in the closed state, the rotating plate body blocks the upper limit hole of the fixed plate body, so that the push rod is under constant pressure on the rotating plate body and cannot retreat when subjected to hydraulic force, thereby forming support.

3. A control method using hydraulic clamping in a movable platen according to claim 2, characterized in that: The fixed plate body is provided with a limiting hole for connecting the push rod, the side wall of the rotating plate body is concave to form an avoidance position, and the avoidance position completely avoids the limiting hole when it rotates to coincide with the limiting hole without interfering with the displacement of the push rod, and the position sensor includes a first sensor provided on the fixed plate body and a second sensor provided on the rotating plate body; The first sensor is located on the outside of the fixed plate body corresponding to the avoidance position of the rotating plate body, and the contour of the fixed plate body corresponding to the avoidance position is the same as the contour of the avoidance position of the rotating plate body. The first sensor is used to sense whether the rotating plate body rotates and convex. If so, it indicates that the rotating plate body is in an open state or not completely closed, and the obtained state signal is an open state; The second sensor is located on the rotating plate body and at the outer contour segment of the fixed plate body corresponding to the limiting hole position. The second sensor is used to sense whether the outer contour segment of the fixed plate body corresponding to the limiting hole position is in place. If so, it indicates that the rotating plate body is in a fully closed state, and the obtained status signal is a closed state.

4. The control method using hydraulic clamping in a movable platen according to claim 1, characterized in that: The driving of the hydraulic operation in the movable platen according to the clamping force parameters required by the current mold includes: When it is determined that the rotary gate is in the closed state, the hydraulic operation is driven to deliver the set pressure and flow to the rodless cavity of the clamping cylinder of the movable template, where the set pressure and flow are set according to the clamping force parameters required by the current mold; the pressure inside the rodless cavity of the clamping cylinder increases, pushing the piston and the push rod connected to the piston toward the rotary gate.

5. The control method using hydraulic clamping in a movable platen according to claim 4, characterized in that: The method of using the push rod as support to push the moving plate in the opposite direction toward the mold and / or generating a force includes: When the push rod presses against the rotating gate, since the rotating gate is in a closed state, the push rod cannot move and forms a support; Control the clamping cylinder to continuously supply oil. At this time, the piston and push rod in the clamping cylinder are fixed, and the clamping cylinder starts to move in the opposite direction toward the mold, so that the movable plate moves and pushes the mold to close; After the mold is closed, the hydraulic force is converted into a clamping force applied to the mold; The real-time value of the current clamping force is obtained. When the real-time value meets the required clamping force parameter, the current hydraulic operation is maintained, and the hydraulic operation is switched to the pressure holding mode to maintain the pressure in the clamping cylinder for high-pressure clamping.

6. A control method using hydraulic clamping in a movable platen according to claim 5, characterized in that: The control method further comprises the following mold opening step: Receive the clamping pressure relief signal, control the rodless cavity of the clamping oil cylinder to relieve pressure, and fill oil through the rod cavity of the clamping oil cylinder to reset the hydraulic pressure; During hydraulic reset, the piston drives the push rod to compress the rodless cavity space so that the push rod moves away from the rotating gate; After the hydraulic pressure is reset, the push rod is separated from the rotating plate body, driving the rotating gate to switch to the open state; The status signal of the position sensor is obtained and it is determined that the current state is the open state, and the mold moving cylinder on the tail plate is controlled to pull the movable plate to open the mold. During the mold opening process, the end of the push rod passes through the limit hole of the fixed plate body through the avoidance position of the rotating plate body and enters the through hole of the tail plate to retreat.

7. An injection molding control system, characterized in that: A control method for implementing a hydraulic mold clamping method in a movable platen according to any one of claims 1 to 6, comprising: A gate control unit, used to drive the rotation of the rotary gate and switch between an open state and a closed state; The clamping unit is used to drive the hydraulic operation in the movable platen. The clamping cylinder of the movable platen pushes the push rod under the hydraulic force. When the push rod presses against the rotating gate, the push rod is used as a support to push the movable platen in the opposite direction toward the mold and / or generate a force, thereby converting the hydraulic force into a clamping force applied to the mold. A clamping force judgment unit is used to obtain a real-time value of the current clamping force, and when the real-time value meets the required clamping force parameter, the clamping unit maintains the current hydraulic operation to perform high-pressure clamping; The injection molding control system is also used to implement the following mold closing steps: Obtain the current state of the rotary gate and determine that the current state is an open state; Controlling the mold-moving oil cylinder on the tail plate to pull the movable platen to quickly close the mold according to the rapid mold closing parameters, wherein the mold closing parameters are pre-set and include a first pressure parameter, a first speed parameter, and a position parameter; After the movable die plate reaches the position set by the position parameters, low-pressure mold closing is performed, and the die plate is pulled to perform low-pressure mold closing according to the low-pressure mold closing parameters, wherein the low-pressure mold closing parameters are pre-set and include a second pressure parameter and a second speed parameter; The real-time clamping force value is obtained, wherein the real-time clamping force value is obtained by the clamping force sensor on the clamping rod. When the real-time clamping force value increases to the high-pressure point of the clamping, a high-pressure clamping signal is generated. The high-pressure point of the clamping is a preset clamping force threshold.

8. An injection molding machine, comprising a memory and a processor, characterized in that: The processor executes the control method using hydraulic clamping in a movable platen as claimed in any one of claims 1 to 6 by calling the control program stored in the memory.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, causes the processor to execute a control method using hydraulic clamping in a movable platen as described in any one of claims 1 to 6.

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