Control method and system for locking mold by utilizing hydraulic pressure in movable mold plate and injection molding machine

Abstract

The invention discloses a control method and system for mold locking through hydraulic pressure in a movable mold plate and an injection molding machine. The control method comprises the following high-pressure mold locking steps that a high-pressure mold locking signal is responded, the current state of a rotary gate plate is obtained, the current state is determined to be an open state, the rotary gate plate is driven to rotate, and the open state is switched to be a closed state; when the push rod abuts against the rotary flashboard, the push rod is used as a support to reversely push the movable template to move towards the mold and / or generate acting force, the real-time mold clamping force value of the current mold clamping force is obtained when the hydraulic acting force is continuously increased, and when the real-time mold clamping force value meets the needed mold clamping force parameter, the mold clamping force is controlled to be in a closed state. And current hydraulic operation is maintained for high-pressure mode locking. By controlling the state switching of the rotary flashboard, under the hydraulic action provided by the mold locking oil cylinder of the movable mold plate, the push rod is used as a support, so that the movable mold plate is directly converted into the mold locking force applied to the mold by utilizing the hydraulic acting force in the plate.

Description

Technical Field

[0001] The 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 prior art, 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 elbow-type clamping mechanism is not ideal. Since the clamping force is mainly obtained by deformation of the pull rod, if the pull rod is too thick and rigid, the force increase curve will rise too steeply and change too sensitively at the clamping point, making mold adjustment difficult or the clamping force insufficient. After long-term use, the mechanical parts of the elbow-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, the pull rod nut, the template or the elbow pin; and due to the use of a hyperbolic elbow, the clamping stroke design is limited (the maximum stroke is when the elbow 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 inventor has developed a new clamping control process that uses the hydraulic pressure in the movable mold plate to provide the clamping force to replace the entire toggle clamping mechanism. The entire toggle clamping component between the rear mold plate and the movable mold plate is removed, and the push rod + hydraulic form is used to push the movable mold plate 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 template. By controlling the state switching of a rotating gate, the rotating gate can be used to seal, lock or open the limit 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 template, the push rod is used as a support, so that the movable template utilizes the hydraulic force in the plate 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 using hydraulic clamping in a movable mold plate, comprising the following high-pressure clamping steps:

[0007] In response to the high-pressure clamping signal, the current state of the rotary gate is obtained and determined to be an open state, the rotary gate is driven to rotate, and the open state is switched to a closed state, so as to block a push rod which is arranged on the movable platen and is acted upon by the hydraulic pressure in the movable platen;

[0008] Obtain the clamping force parameters required by the current mold, which are preset, and drive the hydraulic operation in the movable mold plate according to the clamping force parameters required by the current mold, so that the clamping cylinder of the movable mold plate pushes the push rod under the hydraulic force;

[0009] When the push rod presses against the rotating gate, the push rod is used as a support to push the moving template in the opposite direction toward the mold and / or generate a force, so as to convert the hydraulic force into a clamping force applied to the mold;

[0010] 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.

[0011] As a further improvement of the present invention, the control method further includes the following mold closing step:

[0012] Obtain the current state of the rotating gate and determine that the current state is an open state;

[0013] Controlling the mold-moving cylinder on the tail plate to pull the movable mold plate to perform rapid mold closing according to rapid mold closing parameters, wherein the mold closing parameters are preset and include a first pressure parameter, a first speed parameter, and a position parameter;

[0014] After the movable mold plate reaches the position set by the position parameter, low-pressure mold closing is performed, and the mold plate is pulled to perform low-pressure mold closing with the low-pressure mold closing parameter, wherein the low-pressure mold closing parameter is preset 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 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, and the high-pressure point of the clamping is a preset clamping force threshold.

[0016] As a further improvement of the present invention, the driving of the rotary gate to rotate comprises:

[0017] Obtain a status signal of a position sensor provided on the rotating gate plate, and determine that the current state is an open state;

[0018] Driving the gate oil cylinder of the rotary gate to rotate the rotating plate body of the rotary gate;

[0019] Obtain the status signal of the position sensor of the rotating gate plate. 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 a 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 rotating to coincide with the limiting hole without interfering with the displacement of the push rod, and the position sensor includes a first sensor arranged on the fixed plate body and a second sensor arranged 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 located at the same contour as the avoidance position of the rotating plate body. The first sensor is used to sense whether the rotating plate body is rotated and protruded. If so, it means that the rotating plate body is in an open state or not completely closed, and the acquired 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 means 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 chamber of the clamping cylinder of the moving 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 moving template in the opposite direction toward the mold and / or generating a force includes:

[0027] 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;

[0028] The clamping cylinder is controlled 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 platen moves to push the mold to close;

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

[0030] 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.

[0031] As a further improvement of the present invention, the control method further includes the following mold opening step:

[0032] Receive the mold clamping pressure relief signal, control the rodless chamber of the mold clamping oil cylinder to release pressure, and fill oil through the rod chamber of the mold clamping oil cylinder to reset the hydraulic pressure;

[0033] During hydraulic resetting, the piston drives the push rod to compress the rodless cavity space so that the push rod moves away from the rotating gate plate;

[0034] 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;

[0035] The status signal of the position sensor is obtained and it is determined that the current state is the open state, and the mold shifting cylinder on the tail plate is controlled to pull the movable mold 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.

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

[0037] A gate control unit, used to drive the rotation of the rotary gate and switch between an open state and a closed state;

[0038] 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 movable platen is pushed in the opposite direction toward the mold with the push rod as support and / or generates a force, so as to convert the hydraulic force into a 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. When the real-time value meets the required clamping force parameter, the clamping unit maintains the current hydraulic operation to perform high-pressure clamping.

[0040] On the other hand, the present invention also provides the following technical solution: an injection molding machine, comprising a memory and a processor, wherein the processor calls a control program stored in the memory to execute a control method using hydraulic clamping in a movable mold plate as described above.

[0041] On the other hand, the present invention also provides the following technical solution: a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the processor executes a control method using hydraulic clamping in a movable mold plate as described above.

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

[0043] The present invention controls the state switching of the rotating gate plate to achieve the blocking and locking or opening of the limit hole where the push rod is located without affecting the displacement of the push rod; under the hydraulic action provided by the locking cylinder of the movable template, the push rod is used as a support, so that the movable template utilizes the hydraulic force inside the plate to directly convert it into a locking force applied to the mold.

[0044] The present invention uses the straight rod body of the push rod as a support, and the end of the push rod is very stable and reliable when it is pressed against the rotating plate body. Its stability and reliability are comparable to the non-traditional solution that uses a toggle-type clamping that is affected by the elastic deformation performance of the toggle. In addition, the hydraulic force is more direct in transmission, and is converted into a clamping force applied to the mold through the hydraulic force in the moving plate, eliminating the process of transmitting the hydraulic power output from the rear tail plate through the toggle-type structure in the traditional injection molding machine, solving the problem of limited toggle travel and mechanical force wear of the traditional injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solution, the drawings required for use in the implementation will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0046] Figure 1 It is a schematic diagram of a flow chart of an embodiment of the present invention.

[0047] Figure 2 It is a schematic structural diagram of a movable die plate and a rotating gate according to an embodiment of the present invention.

[0048] Figure 3 It is a schematic structural diagram of a movable template according to an embodiment of the present invention.

[0049] Figure 4 It is a schematic structural diagram of a rotary gate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to enable a clear and complete understanding of the technical solution, the present invention is further described in conjunction with the embodiments and drawings. Obviously, the described embodiments are only some embodiments of the present invention, and all other embodiments obtained by technicians in the relevant field without making creative work are within the scope of protection of the present invention.

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

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

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

[0054] The embodiment of the present invention provides a control method using hydraulic clamping in a movable platen, such as Figure 1 As shown, the high pressure clamping steps are as follows:

[0055] S101, responding to the high-pressure mold locking signal, obtaining the current state of the rotary gate and determining that the current state is an open state;

[0056] S102, driving the rotary gate to rotate, switching the open state to the closed state, so as to block the push rod provided on the moving template and acted upon by the hydraulic pressure in the moving template;

[0057] S103, obtaining the clamping force parameters required by the current mold, the required clamping force parameters are preset, and driving the hydraulic operation in the movable mold plate according to the clamping force parameters required by the current mold, and the clamping cylinder of the movable mold plate pushes the push rod under the hydraulic force;

[0058] S104, when the push rod is pressed against the rotating gate, the push rod is used as a support to push the moving template in the opposite direction toward the mold to move and / or generate a force, so as to convert the hydraulic force into a clamping force applied to the mold;

[0059] S105, obtaining a real-time clamping force value of the current clamping force while continuously increasing the hydraulic force, wherein the real-time clamping force value is monitored by a clamping force sensor;

[0060] S106. When the real-time clamping force value meets the required clamping force parameter, the current hydraulic operation is maintained to perform high-pressure clamping.

[0061] Through the above steps, the hydraulic pressure in the moving platen is converted into a clamping force, which is more direct and reliable. The straight rod of the push rod is used as a support, one end of which is fixedly connected to the piston, and the other end is pressed against the rotating gate plate. The rotating gate plate is set close to the tail plate. Therefore, the end of the push rod is pressed against the rotating plate body, which is very stable and reliable. Its stability and reliability are comparable to the elastic deformation performance of the elbow rod in the non-traditional solution using the elbow-type clamping. In addition, the hydraulic force is more direct in transmission, and is converted into the clamping force applied to the mold through the hydraulic force in the moving platen, eliminating the process of transmitting the hydraulic power output from the rear tail plate through the elbow-type structure in the traditional injection molding machine, solving the problem of limited elbow travel and mechanical force wear of the traditional injection molding machine.

[0062] In order to better understand the above steps, the present embodiment further describes the structure of the moving plate and the rotating gate. Figure 2-3 As shown, a plurality of clamping cylinders 110 are provided in the movable template 100, and the clamping cylinders are integrally machined with the movable template on the movable template rather than being externally installed. Furthermore, the hydraulic oil inlet pipeline of the clamping cylinder is input through one side of the movable template 100 (through the hydraulic integrated valve group 120 arranged on one side of the movable template), and an internal pipeline is arranged in the movable template 100 to communicate with the rodless cavity of the clamping cylinder 110, and at the same time, the rod cavity of the clamping cylinder is connected to the hydraulic integrated valve group 120 by an oil pipe for hydraulic resetting.

[0063] It should be noted that the mold locking oil cylinder has a piston and the piston is connected to the push rod to divide the cylinder into a rodless chamber (bottom side) and a rod chamber (top side). This embodiment does not elaborate too much on the structure of the mold locking oil cylinder, including the oil seal between the piston and the cylinder wall, between the push rod and the cylinder cover, etc., which can be obtained by using existing technology. At the same time, this embodiment does not impose any restrictions on the control of the hydraulic system or the implementation method of providing hydraulic force. The technicians can set it according to the actual use requirements. The existing technology can be used to input and control the operation of hydraulic pressure into the moving mold plate through the hydraulic control system.

[0064] Furthermore, the piston of the locking cylinder 110 is fixedly connected to the push rod 130. During hydraulic operation, oil is fed into the rodless chamber to move the piston and the push rod. At this time, the push rod is fixed by rotating the gate plate 200, so that the locking cylinder can be supported by the push rod and move toward the mold direction with the movable template and / or output hydraulic force.

[0065] Further explain the structure of the rotating gate, such as Figure 2 and4 As shown, the rotary gate is installed on the tail plate 300, and the rotary gate includes a fixed plate body 210, a rotating plate body 220 and a gate oil cylinder 230. The fixed plate body 210 is provided with a limit hole 211 for connecting the push rod, that is, the push rod can be displaced in the limit hole along the axial direction of the hole. The rotation of the rotary plate body is controlled by the gate oil cylinder, so that the rotary plate body can block the limit hole to limit or fix the push rod and can open the limit hole so that the push rod can be displaced in the limit hole without interference.

[0066] In this embodiment, by controlling the state switching of the rotating gate, the rotating gate can block or open the limit 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, the push rod is supported, so that the movable platen directly converts the hydraulic force in the platen into the clamping force applied to the mold.

[0067] For better understanding, in an optional embodiment, the control method further includes the following mold closing step:

[0068] Obtain the current state of the rotating gate and determine that the current state is an open state;

[0069] Controlling the mold-moving cylinder on the tail plate to pull the movable mold plate to perform rapid mold closing according to rapid mold closing parameters, wherein the mold closing parameters are preset and include a first pressure parameter, a first speed parameter, and a position parameter;

[0070] After the movable mold plate reaches the position set by the position parameter, low-pressure mold closing is performed, and the mold plate is pulled to perform low-pressure mold closing with the low-pressure mold closing parameter, wherein the low-pressure mold closing parameter is preset and includes a second pressure parameter and a second speed parameter;

[0071] 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, and the high-pressure point of the clamping is a preset clamping force threshold.

[0072] Generally speaking, before the high-pressure clamping step, there are also a quick clamping step and a low-pressure clamping step. In the present invention, the clamping parameters are pre-set. This embodiment does not impose any restrictions on the specific parameter settings. The specific parameter settings are determined according to various factors such as different injection molding machines, different molds, and different product requirements. The technicians set the corresponding clamping parameters according to actual usage requirements.

[0073] For example, the initial setting value of the mold clamping pressure is usually set to 25. If this pressure is too low and the speed is too slow, you can try to gradually increase the pressure, increasing it by +5 each time for testing. The mold 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 pauses and 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 mold clamping, the low-pressure mold clamping speed should be slow. Even if the low pressure is set, too fast a speed may still cause huge impact damage due to inertia. When encountering unexpected hard obstacles, the low-pressure and slow mold clamping protection parameters can greatly reduce impact damage. Pressure control can start with the speed set to several tens, and then keep it unchanged, adjust the pressure very low (for example, 5) for testing, and gradually increase the pressure to a suitable mold clamping protection speed.

[0074] In this embodiment, after rapid mold clamping and low-pressure mold closing, the real-time clamping force value is obtained. When the real-time clamping force value increases to the high-pressure clamping point, a high-pressure clamping signal is generated. The high-pressure clamping point is a preset clamping force threshold.

[0075] In an optional embodiment, the driving the rotating gate to rotate comprises:

[0076] Obtain a status signal of a position sensor provided on the rotating gate plate, and determine that the current state is an open state;

[0077] Driving the gate oil cylinder of the rotary gate to rotate the rotating plate body of the rotary gate;

[0078] Obtain the status signal of the position sensor of the rotating gate plate. 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 a 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.

[0079] In order to better understand the limitation of the push rod by rotating the gate so that the push rod can be fixed to form a support, 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 when it is rotated to coincide with the limiting hole without interfering with the displacement of the push rod, and 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, such as Figure 4 As shown;

[0080] 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 located at the same 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 means that the rotating plate body is in an open state or not completely closed. The state signal obtained is an open state. Figure 4 The rotating plate 220 and the fixed plate 210 are shown in a state where they are staggered with each other;

[0081] The second sensor is located on the rotating plate body and is located at the outer contour segment of the fixed plate body at the corresponding limit hole position. The second sensor is used to sense whether the outer contour segment of the fixed plate body at the corresponding limit hole position is in place. If so, it means that the rotating plate body is in a fully closed state, and the obtained state signal is a closed state, such as Figure 2 The rotating plate 220 and the fixed plate 210 are shown in an overlapped state.

[0082] Those skilled in the art can understand that the first sensor and the second sensor are used to monitor whether the rotating gate is in an open state or a closed state. Based on this purpose, the signal acquisition of the opening and closing of the limit hole can also be achieved by jointly judging the signals obtained by the two sensors, or it can be monitored by other sensing forms, such as setting a monitoring sensor in the limit hole to obtain the open or closed state of the limit hole.

[0083] In an optional embodiment, the step of driving the hydraulic operation in the movable platen according to the clamping force parameters required by the current mold includes:

[0084] 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 chamber of the clamping cylinder of the moving platen, wherein the set pressure and flow are set according to the clamping force parameters required by the current mold;

[0085] 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.

[0086] 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;

[0087] The clamping cylinder is controlled 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 platen moves to push the mold to close;

[0088] After the mold is closed, the hydraulic force is converted into a clamping 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, and the hydraulic operation is switched to the pressure holding mode to maintain the pressure in the clamping cylinder for high-pressure clamping.

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

[0091] After injection molding, the mold clamping pressure relief signal is received to control the rodless chamber of the mold clamping oil cylinder to relieve pressure, and oil is fed through the rod chamber of the mold clamping oil cylinder to reset the hydraulic pressure;

[0092] During hydraulic resetting, the piston drives the push rod to compress the rodless cavity space so that the push rod moves away from the rotating gate plate;

[0093] 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;

[0094] The status signal of the position sensor is obtained and it is determined that the current state is the open state, and the mold shifting cylinder on the tail plate is controlled to pull the movable mold 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.

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

[0096] On the other hand, an injection molding control system is also provided in an embodiment of the present invention, and the system is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the terms "module" and "unit" can implement a combination of software and / or hardware for a predetermined function. Although the device units described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived. An injection molding control system provided in this embodiment is used to implement a control method using hydraulic clamping in a movable mold plate as described in one or more optional embodiments above, including:

[0097] A gate control unit, used to drive the rotation of the rotary gate and switch between an open state and a closed state;

[0098] 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 movable platen is pushed in the opposite direction toward the mold with the push rod as support and / or generates a force, so as to convert the hydraulic force into a clamping force applied to the mold.

[0099] The clamping force judgment unit is used to obtain the real-time value of the current clamping force. When the real-time value meets the required clamping force parameter, the clamping unit maintains the current hydraulic operation to perform high-pressure clamping.

[0100] It should be noted that the above modules or units can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules and units are all located in the same processor; or the above modules and units are located in different processors in any combination.

[0101] On the other hand, the present invention also provides another embodiment: an injection molding machine, comprising a memory and a processor, wherein the processor calls a control program stored in the memory to execute a control method using hydraulic clamping in a movable mold plate as described above.

[0102] Optionally, in this embodiment, the processor may be configured to execute the following steps through a control program:

[0103] S101, responding to the high-pressure mold locking signal, obtaining the current state of the rotary gate and determining that the current state is an open state;

[0104] S102, driving the rotary gate to rotate, switching the open state to the closed state, so as to block the push rod provided on the moving template and acted upon by the hydraulic pressure in the moving template;

[0105] S103, obtaining the clamping force parameters required by the current mold, the required clamping force parameters are preset, and driving the hydraulic operation in the movable mold plate according to the clamping force parameters required by the current mold, and the clamping cylinder of the movable mold plate pushes the push rod under the hydraulic force;

[0106] S104, when the push rod is pressed against the rotating gate, the push rod is used as a support to push the moving template in the opposite direction toward the mold to move and / or generate a force, so as to convert the hydraulic force into a clamping force applied to the mold;

[0107] S105, obtaining a real-time clamping force value of the current clamping force while continuously increasing the hydraulic force, wherein the real-time clamping force value is monitored by a clamping force sensor;

[0108] S106. When the real-time clamping force value meets the required clamping force parameter, the current hydraulic operation is maintained to perform high-pressure clamping.

[0109] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0110] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a 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 a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components.

[0111] On the other hand, the present invention also provides another embodiment: a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the processor executes a control method using hydraulic clamping in a movable mold plate as described in one or more of the above optional embodiments.

[0112] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0113] S101, responding to the high-pressure mold locking signal, obtaining the current state of the rotary gate and determining that the current state is an open state;

[0114] S102, driving the rotary gate to rotate, switching the open state to the closed state, so as to block the push rod provided on the moving template and acted upon by the hydraulic pressure in the moving template;

[0115] S103, obtaining the clamping force parameters required by the current mold, the required clamping force parameters are preset, and driving the hydraulic operation in the movable mold plate according to the clamping force parameters required by the current mold, and the clamping cylinder of the movable mold plate pushes the push rod under the hydraulic force;

[0116] S104, when the push rod is pressed against the rotating gate, the push rod is used as a support to push the moving template in the opposite direction toward the mold to move and / or generate a force, so as to convert the hydraulic force into a clamping force applied to the mold;

[0117] S105, obtaining a real-time clamping force value of the current clamping force while continuously increasing the hydraulic force, wherein the real-time clamping force value is monitored by a clamping force sensor;

[0118] S106. When the real-time clamping force value meets the required clamping force parameter, the current hydraulic operation is maintained to perform high-pressure clamping.

[0119] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0120] Optionally, in this embodiment, the storage medium may include but is not limited to: a USB flash drive, a read-only memory ROM, a random access memory RAM, a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

[0121] Computer-readable storage media include both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable storage medium.

[0122] The above disclosure is only one or more preferred embodiments of the present invention, which are used to help understand the inventive concept of the technical solution, and is not intended to limit the present invention in other forms. Technical personnel in the relevant field may make other equivalent or customary replacement schemes based on the features defined by the present invention, which still fall within the scope of the present invention.

Claims

1. A control method using hydraulic clamping in a movable platen, characterized in that: The high pressure clamping steps include: In response to the high-pressure clamping signal, the current state of the rotary gate is obtained and determined to be an open state, the rotary gate is driven to rotate, and the open state is switched to a closed state, so as to block a push rod which is arranged on the movable platen and is acted upon by the hydraulic pressure in the movable platen; Obtain the clamping force parameters required by the current mold, which are preset, and drive the hydraulic operation in the movable mold plate according to the clamping force parameters required by the current mold, so that the clamping cylinder of the movable mold plate 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 moving template in the opposite direction toward the mold and / or generate a force, so as to convert 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.

2. A control method using hydraulic clamping in a movable platen according to claim 1, characterized in that: The following mold closing steps are also included: Obtain the current state of the rotating gate and determine that the current state is an open state; Controlling the mold-moving cylinder on the tail plate to pull the movable mold plate to perform rapid mold closing according to rapid mold closing parameters, wherein the mold closing parameters are preset and include a first pressure parameter, a first speed parameter, and a position parameter; After the movable mold plate reaches the position set by the position parameter, low-pressure mold closing is performed, and the mold plate is pulled to perform low-pressure mold closing with the low-pressure mold closing parameter, wherein the low-pressure mold closing parameter is preset and includes 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, and the high-pressure point of the clamping is a preset clamping force threshold.

3. 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: Obtain a status signal of a position sensor provided on the rotating gate plate, and 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 plate. 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 a 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.

4. A control method using hydraulic clamping in a movable platen according to claim 3, 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 rotating to coincide with the limiting hole without interfering with the displacement of the push rod, and the position sensor includes a first sensor arranged on the fixed plate body and a second sensor arranged 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 located at the same contour as the avoidance position of the rotating plate body. The first sensor is used to sense whether the rotating plate body is rotated and protruded. If so, it means that the rotating plate body is in an open state or not completely closed, and the acquired 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 means that the rotating plate body is in a fully closed state, and the obtained status signal is a closed state.

5. The control method using hydraulic clamping in a movable platen according to claim 1 is characterized in that: The method of driving the hydraulic operation in the movable platen according to the clamping force parameters required by the current mold includes: 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 chamber of the clamping cylinder of the moving platen, wherein the set pressure and flow are set according to the clamping force parameters required by the current mold; 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.

6. A control method using hydraulic clamping in a movable platen according to claim 5, characterized in that: The method of using the push rod as support to push the moving template 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; The clamping cylinder is controlled 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 platen moves to push 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.

7. A control method using hydraulic clamping in a movable platen according to claim 6, characterized in that: The control method also includes the following mold opening step: Receive the mold clamping pressure relief signal, control the rodless chamber of the mold clamping oil cylinder to release pressure, and fill oil through the rod chamber of the mold clamping oil cylinder to reset the hydraulic pressure; During hydraulic resetting, the piston drives the push rod to compress the rodless cavity space so that the push rod moves away from the rotating gate plate; 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 shifting cylinder on the tail plate is controlled to pull the movable mold 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.

8. An injection molding control system, characterized in that: A control method for implementing a hydraulic mold clamping method in a movable mold plate as claimed in any one of claims 1 to 7, 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 movable platen is pushed in the opposite direction toward the mold with the push rod as support and / or generates a force, so as to convert the hydraulic force into a clamping force applied to the mold. The clamping force judgment unit is used to obtain the real-time value of the current clamping force. When the real-time value meets the required clamping force parameter, the clamping unit maintains the current hydraulic operation to perform high-pressure clamping.

9. 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 mold plate as described in any one of claims 1 to 7 by calling the control program stored in the memory.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the processor executes the control method using hydraulic clamping in a movable mold plate as described in any one of claims 1 to 7.

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