An adaptive mold adjusting method, mold adjusting system and injection molding machine according to mold size

Abstract

This invention discloses an adaptive mold adjustment method, system, and injection molding machine based on mold size. The mold adjustment method includes: determining the target mold thickness movement position; applying a clamping force to the mold through a moving platen at the target mold thickness position; acquiring the first real-time force value of the current clamping force; determining whether the first real-time force value reaches a preset clamping target threshold; if yes, mold adjustment is complete; if no, increasing the clamping force through the hydraulic operation of the moving platen; when the hydraulic operation of the moving platen reaches its upper limit, re-determining the target mold thickness movement position by adjusting the tail plate position until the first real-time force value reaches the clamping target threshold. This invention uses the hydraulic pressure within the moving platen and the limiting of the push rod by the rotating gate to adaptively adjust the required mold thickness as the hydraulic force increases during the mold adjustment process, eliminating the need for manual operation and achieving "one-click" adaptive mold adjustment based on mold size.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine technology, and in particular to an adaptive mold adjustment method, mold adjustment system and injection molding machine based on mold size. Background Technology

[0002] With industrial development, the requirements for some plastic products are becoming increasingly stringent. Many molds have complex structures, requiring long mold opening strokes and large mold opening forces. In today's injection molding production, mold changes are very frequent, thus increasing the demands on injection molding machines. After mold replacement, changes in mold thickness, material, etc., lead to changes in the clamping force after mold closing. Therefore, it is necessary to adjust the mold adjustment position and mold adaptability to obtain the desired clamping force. However, the force state of the toggle-type clamping mechanism is not ideal. Since it mainly relies on the deformation of the tie rod to obtain the clamping force, if the tie rod is too thick and rigid, the force amplification curve will rise too steeply and change too sensitively at the clamping point, making mold adjustment difficult. After long-term use, mechanical components of the toggle-type clamping device, such as tie bars and bearing seats, may wear down, leading to a decrease in clamping force. Furthermore, due to the use of a double-curved toggle design, the clamping stroke is limited (the maximum stroke is when the toggle is fully extended), making it unsuitable for large injection molding equipment or requiring long strokes.

[0003] In traditional injection molding machine mold adjustment schemes, the adjustment process can easily exceed the machine's adjustment stroke range. Molds that are too thick or too thin may cause the toggle joint to fail to lock or, once locked, to fail to clamp the mold, affecting normal production. Furthermore, because traditional injection molding machines use a toggle-type structure, many steps require manual operation. This manual operation demands high skill from operators and is prone to human error, potentially leading to significant economic losses and hindering the widespread adoption of injection molding machines.

[0004] Based on the above, the inventors developed an injection molding machine that uses hydraulic pressure within the moving template to provide clamping force, replacing the entire elbow-type clamping mechanism. This eliminates the entire elbow-type clamping component between the rear template and the moving template. The machine's operation mode, which combines push rods and hydraulic pressure within the moving template, enables automatic mold adjustment based on different mold sizes during the mold adjustment process. Summary of the Invention

[0005] To address one or more of the aforementioned problems, this invention provides an adaptive mold adjustment method, a mold adjustment system, and an injection molding machine based on mold size. By using the hydraulic pressure within the moving mold plate and the limiting of the push rod by the rotating gate, the required mold thickness can be adaptively adjusted as the hydraulic force increases during the mold adjustment process, eliminating the need for manual operation and achieving "one-click" automatic mold adjustment.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a method for adaptive mold adjustment based on mold size, comprising:

[0007] Determine the target mold thickness movement position;

[0008] A clamping force is applied to the mold through the moving template at the target mold thickness position;

[0009] Obtain the first real-time force value of the current clamping force, and determine whether the first real-time force value has reached the preset clamping target threshold;

[0010] If so, the mold adjustment is complete;

[0011] If not, increase the clamping force by hydraulically operating the moving template. When the hydraulic force of the moving template reaches its upper limit, redetermine the target mold thickness movement position by adjusting the tail plate position until the first real-time force value reaches the target clamping threshold.

[0012] As a further improvement of the present invention, determining the target mold thickness movement position includes:

[0013] The hydraulic cylinder controlling the tail plate drives the moving platen to move to the first target position, which is preset according to the push rod length of the moving platen and / or the specified distance between the moving platen and the tail platen;

[0014] The rotary gate is switched to the closed state to limit the push rod.

[0015] The tail plate and the moving template are driven to move in the mold closing direction by the mold adjustment device on the tail plate until the mold is closed;

[0016] Obtain the second real-time force value of the current clamping force, and determine whether the second real-time force value has reached the preset mold adjustment target threshold;

[0017] When the second real-time force value reaches the mold adjustment target threshold, the current mold thickness position is determined as the target mold thickness movement position.

[0018] As a further improvement of the present invention, the step of applying a clamping force to the mold through a moving template at the target mold thickness position includes:

[0019] The hydraulic operation of the locking cylinder of the moving template is controlled by the hydraulic integrated valve group on one side of the moving template, which enters the rodless chamber of the locking cylinder through the pipeline inside the plate. This causes the rodless chamber to push the piston and the push rod fixedly connected to the piston. Since the push rod is limited by the rotating gate, the hydraulic force of the locking cylinder pushes the moving template in the opposite direction with the push rod as support, and applies a locking force to the mold.

[0020] As a further improvement of the present invention, the step of determining whether the first real-time force value reaches a preset mold-locking target threshold includes:

[0021] The first real-time force value is obtained by a clamping force sensor mounted on the tie rod;

[0022] When the moving template applies clamping force to the mold, the clamping force starts from the mold adjustment target threshold when the target mold thickness is determined to move to the desired position, and increases until the first real-time force value reaches the clamping target threshold. This indicates that the current mold thickness position can meet the clamping force required for mold production.

[0023] As a further improvement of the present invention, the target mold thickness movement position is re-determined by adjusting the tail plate position, including:

[0024] When the hydraulic pressure of the mold-locking cylinder reaches the set upper limit, if the first real-time force value fails to reach the mold-locking target threshold, the tail plate is controlled to retreat a set distance. This set distance is less than the stroke of the piston in the mold-locking cylinder, which is used to increase the effective working area of ​​the rodless cavity of the mold-locking cylinder to increase the hydraulic force until the first real-time force value reaches the mold-locking target threshold.

[0025] As a further improvement of the present invention, the control of the tail plate retracting a set distance includes:

[0026] When controlling the tail plate to move backward, first release the hydraulic pressure of the mold-locking cylinder, and then control the hydraulic operation of the mold-locking cylinder after moving backward a set distance.

[0027] If the mold retraction is repeated multiple times and the total retraction distance is less than the stroke of the piston in the mold-locking cylinder, the mold adjustment will stop and a fault signal will be issued to stop the machine for inspection when the total retraction distance is greater than or equal to the stroke of the piston.

[0028] As a further improvement of the present invention, the drive rotary gate is switched to the closed state, including:

[0029] When the moving mold cylinder drives the moving mold plate to the first target position, the hydraulic reset of the mold locking cylinder of the moving mold plate is controlled, so that the piston is at the bottom of the mold locking cylinder, one end of the push rod is fixedly connected to the piston, and the other end is located in the limiting hole of the fixed plate of the rotating gate and does not protrude from the limiting hole.

[0030] The rotary gate includes a fixed plate and a rotating plate, as well as a gate cylinder that drives the rotating plate to rotate around the central hole axis. When the rotating plate rotates to the closed state, the rotating plate and the fixed plate overlap to block the limiting hole of the fixed plate. When the rotating plate rotates to the open state, the rotating plate and the fixed plate are offset to overlap the clearance of the rotating plate and the limiting hole of the fixed plate, so that the push rod can pass through the limiting hole, the clearance, and the through hole of the tail plate to make displacement.

[0031] When the drive rotary gate is switched to the closed state, the push rod is pressed against the rotary plate by the hydraulic force of the mold-locking cylinder, and thus fixed or limited to form a support. The hydraulic force of the mold-locking cylinder acts in the opposite direction on the moving template with the push rod as support, so that the moving template moves in the mold closing direction and / or applies a mold-locking force to the mold.

[0032] As a further improvement of the present invention, the step of driving the tail plate and the moving template to move in the mold closing direction through the mold adjusting device on the tail plate includes:

[0033] The tail plate moves in the mold closing direction via the mold adjustment device. The closed rotary gate pushes the push rod to move accordingly. The moving template is pushed and the piston pushes it to move towards the mold until the reading of the template position ruler no longer changes, indicating that the mold is closed.

[0034] By monitoring the second real-time force value of the clamping force, when the second real-time force value reaches the mold adjustment target threshold, the tail plate is controlled to retreat a set distance by the mold adjustment device based on the current mold thickness position, which is the reserved hydraulic space for the rodless cavity of the clamping cylinder.

[0035] Determine the current mold thickness position as the target mold thickness movement position.

[0036] On the other hand, the present invention also provides another technical solution: an adaptive mold adjustment system, including a memory and a processor, wherein the processor executes an adaptive mold adjustment method based on mold size as described above by calling a control program stored in the memory.

[0037] On the other hand, the present invention also provides another technical solution: an injection molding machine, including a memory and a processor, wherein the processor executes an adaptive mold adjustment method based on mold size as described above by calling a control program stored in the memory.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] This invention utilizes the hydraulic pressure within the moving template and the limiting of the push rod by a rotating gate. During mold adjustment, the required mold thickness is adaptively adjusted as the hydraulic force increases, avoiding manual operation and achieving "one-click" automatic mold adjustment. This solves the problem of traditional solutions requiring manual adjustment by pressing the "forward" or "backward" button when approaching the target clamping force. This embodiment achieves adaptive mold adjustment efficiently and conveniently. Attached Figure Description

[0040] To more clearly illustrate the technical solution, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram illustrating the process of an embodiment of the present invention.

[0042] Figure 2 This is a flowchart illustrating an embodiment of the present invention.

[0043] Figure 3 This is a schematic diagram of the injection molding machine structure according to an embodiment of the present invention.

[0044] Figure 4 This is a schematic diagram of the injection molding machine structure according to an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the rotating gate structure according to an embodiment of the present invention. Detailed Implementation

[0046] In order to clearly and completely understand the technical solution, the present invention will be further described in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0048] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this 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.

[0049] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0050] Embodiments of the present invention provide an adaptive mold adjustment method based on mold size. By using hydraulic pressure within the moving mold platen and a rotating gate to limit the push rod, the required mold thickness can be adaptively adjusted as the hydraulic force increases during the mold adjustment process. To better understand the concept of the present invention, it is necessary to explain the structure and operation of the injection molding machine of the present invention, specifically, in conjunction with... Figure 3-5 The injection molding machine includes a fixed platen 100, a moving platen 200, and a tail plate 300. The fixed platen 100 is connected to the moving platen 200 by tie rods 400 at its four corners. The tie rods 400 pass through the moving platen 200 and are fixed to the tail plate 300. The tail plate 300 is equipped with a rotary gate 500. There is a mold moving cylinder 310 on each side of the tail plate 300. The piston rod of the mold moving cylinder 310 is fixedly connected to the moving platen 100. During mold closing / opening, the mold moving cylinder 310 drives the moving platen 200 to move.

[0051] The moving template has several locking cylinders 210. The piston of the locking cylinder 210 is fixedly connected to the end of the push rod 220. The other end of the push rod 220 is set on the limiting hole 511 of the fixed plate 510 of the rotating gate 500. The rodless cavity of the locking cylinder 210 (i.e., between the piston and the bottom of the cylinder) is connected through the plate pipe of the moving template 200 (which is processed by drilling through a hole on one side of the moving template, and is not an external pipe, but is integrated with the moving template). A hydraulic integrated valve group 230 is provided on one side of the moving template 200 at the inlet and outlet of the plate pipe, which is used to connect to the external hydraulic system and control the hydraulic operation of the locking cylinder.

[0052] A rotary gate 500 is mounted on the tail plate 300. The rotary gate 500 includes a fixed plate 510, a rotating plate 520, and a gate cylinder 530. The fixed plate 510 has a limiting hole 511 for connecting a push rod, allowing the push rod to move along the axis of the hole within the limiting hole. The rotating plate 520 is rotated by the gate cylinder 530, thereby enabling the rotating plate 520 to block or fix the push rod by the limiting hole, and also enabling it to open the limiting hole to allow the push rod 400 to move within the limiting hole 511 without interference.

[0053] To further explain the operation of the injection molding machine, during mold closing, the moving platen 200 is driven to close the mold via the mold-moving cylinder 310. After reaching the closing position, the rotating platen 520 of the rotary gate 500 switches to the closed state. Figure 3In the rotating gate shown, the rotating plate and the fixed plate are in a state of overlap. At this time, the hydraulic operation of the locking cylinder 210 of the moving platen 200 causes the piston to drive the push rod 400 to press against the rotating platen 520. The push rod 400 is then fixed. As the hydraulic pressure increases, the locking cylinder 210 and the moving platen 200 begin to move in opposite directions toward the fixed platen 100, applying a locking force to the mold after it closes. When opening the mold, the locking cylinder 210 is first depressurized and hydraulically reset, and then the rotating gate 500 is switched to the open state. Figure 5 In the rotating gate shown, the rotating plate and the fixed plate are staggered. The moving plate 200 is pulled back in the mold opening direction by the mold moving cylinder 310, while the push rod 400 can pass through the rotating plate 520 and move backward along the through hole of the tail plate.

[0054] Based on the structure of the injection molding machine described above, this embodiment provides a method for adaptive mold adjustment according to mold size, referencing... Figure 1 and Figure 2 ,include:

[0055] Determine the target mold thickness movement position;

[0056] A clamping force is applied to the mold through the moving template at the target mold thickness position;

[0057] Obtain the first real-time force value of the current clamping force, and determine whether the first real-time force value has reached the preset clamping target threshold;

[0058] If so, the mold adjustment is complete;

[0059] If not, increase the clamping force by hydraulically operating the moving template. When the hydraulic operation of the moving template reaches the upper limit, redetermine the target mold thickness movement position by adjusting the tail plate position until the first real-time force value reaches the target clamping threshold.

[0060] Those skilled in the art will understand that the target clamping threshold is set according to the projected area and material properties of the molded product to determine the required clamping force value. The clamping force sensor is installed on the clamping tie rod (Grail) and can monitor the magnitude of the clamping force in real time.

[0061] It should be noted that the movement of the tail plate is achieved through the mold adjustment device on the tail plate, such as... Figure 4 As shown, the mold adjustment device includes a mold adjustment gear 320 located in the middle of the side of the tail plate 300, a mold adjustment motor 330 driving the mold adjustment gear 320, and a mold adjustment stud 340 connected to the mold adjustment gear 320. The mold adjustment stud 340 is connected to the tie rod 400 so that the mold adjustment motor 330 drives the mold adjustment gear 320 and the mold adjustment stud 340 to rotate and generate axial displacement, thereby pushing the tail plate and / or the moving platen to move axially, which is used to adjust the mold thickness (the maximum and minimum thickness of the mold that the injection molding machine can accommodate) and the clamping force.

[0062] The above steps achieve "one-click" automatic mold adjustment, eliminating the need for manual operation of components such as the tail plate and moving template. Furthermore, the clamping force in this embodiment exhibits a linear progression from small to large. By setting a target clamping threshold, the required mold thickness can be determined when the real-time clamping force reaches that threshold. This solution overcomes the traditional method of manually adjusting the mold by pressing the "forward" or "backward" button when approaching the target clamping force. This embodiment enables efficient and convenient adaptive mold adjustment.

[0063] In an optional embodiment, determining the target die thickness movement position includes:

[0064] The hydraulic cylinder controlling the tail plate drives the moving template to move to the first target position. The first target position is preset based on the push rod length of the moving template and / or the specified distance between the moving template and the tail plate. In this embodiment, the clamping force is generated by the hydraulic pressure inside the moving template, while the push rod presses against the rotating gate plate, which is equivalent to pressing against the tail plate. The length of the push rod is fixed, that is, the specified distance between the moving template and the tail plate can also be preset. When the first target position is set so that the moving template moves to the first target position, the push rod is located in the limiting hole of the fixed plate body and does not affect the rotation of the rotating plate body. The tail plate is located in the initial position.

[0065] The rotary gate is switched to the closed state to limit the push rod.

[0066] The tail plate and the moving platen are driven to move in the mold closing direction by the mold adjustment device on the tail plate until the mold is closed. When the mold adjustment device drives the tail plate, the force output of the mold moving cylinder can be released. At this time, the tail plate moves in the mold closing direction and pushes the push rod by the rotating gate plate. Then, the push rod transmits the power to the piston, the mold locking cylinder and the moving platen, so that the moving platen also moves in the mold closing direction. The moving platen and the tail platen can compress the rodless cavity of the mold locking cylinder, so that the piston can abut against the cylinder body.

[0067] The second real-time force value of the current clamping force is obtained, and it is determined whether the second real-time force value reaches the preset mold adjustment target threshold. Generally speaking, the mold adjustment target threshold should be lower than the clamping target threshold. The setting of the mold adjustment target threshold only needs to meet the resistance of mold closing. It should be set as low as possible, such as being able to offset the frictional resistance of mold closing (frictional resistance between the mold plate and the tie rod, frictional resistance of the guide post and guide sleeve after the moving and fixed molds contact, frictional resistance of the inclined guide post and slider, frictional resistance between the moving mold plate and the support component, etc.).

[0068] When the second real-time force value reaches the mold adjustment target threshold, the current mold thickness position is determined as the target mold thickness movement position.

[0069] This embodiment aims to determine the mold thickness position when the mold is closed. In some embodiments, it can also be determined by obtaining the reading of a template position gauge. During mold adjustment, when the reading of the template position gauge no longer changes, indicating that the mold has been closed by force, the reading of the template position gauge is recorded as the initial thickness of the mold, and the current mold thickness position is determined as the target mold thickness movement position. In other embodiments, the initial mold thickness is determined using data provided by the mold manufacturer or by actually measuring the mold thickness. When the mold moves to this initial thickness position, the current mold thickness position is determined as the target mold thickness movement position.

[0070] In an optional embodiment, driving the tail plate and the moving template to move in the mold closing direction via the tail plate adjusting device includes:

[0071] The tail plate moves in the mold closing direction through the mold adjustment device. The closed rotary gate pushes the push rod to move accordingly. The moving plate is pushed and the piston pushes it to move towards the mold until the reading of the plate position ruler no longer changes, indicating that the mold is closed.

[0072] By monitoring the second real-time force value of the clamping force, when the second real-time force value reaches the mold adjustment target threshold, the tail plate is controlled to retreat a set distance based on the current mold thickness position, which is the hydraulic space reserved in the rodless cavity of the clamping cylinder. This set distance is less than the stroke of the piston movement in the clamping cylinder.

[0073] Determine the current mold thickness position as the target mold thickness movement position.

[0074] In an optional embodiment, applying a clamping force to the mold via a moving template at the target mold thickness location includes:

[0075] The hydraulic operation of the locking cylinder of the moving template is controlled by the hydraulic integrated valve group on one side of the moving template, which enters the rodless chamber of the locking cylinder through the pipeline inside the plate. This causes the rodless chamber to push the piston and the push rod fixedly connected to the piston. Since the push rod is limited by the rotating gate, the hydraulic force of the locking cylinder pushes the moving template in the opposite direction with the push rod as support, and applies a locking force to the mold.

[0076] Those skilled in the art will understand that the sealing connection between the push rod and the mold-locking cylinder, and between the cylinder body and cylinder head of the mold-locking cylinder in this embodiment, has an oil seal design. This embodiment does not impose any limitations on the oil seal structure and materials; existing technology can be used to achieve this. Furthermore, this invention does not limit the structure of the hydraulic integrated valve group or the hydraulic control system. The hydraulic integrated valve group is generally a highly integrated component composed of a valve block, hydraulic valve, auxiliary components, etc. The hydraulic control system is responsible for providing hydraulic power. Technicians can set it themselves according to actual usage requirements. Existing hydraulic control technology can be used to control the flow rate, pressure, and direction of the working oil in each pipeline through the hydraulic integrated valve group.

[0077] In an optional embodiment, determining whether the first real-time force value reaches a preset mold-locking target threshold includes:

[0078] The first real-time force value is obtained by a clamping force sensor mounted on the tie rod;

[0079] When the moving template applies clamping force to the mold, the clamping force increases from the mold adjustment target threshold when the target mold thickness is determined to be at the moving position, until the first real-time force value reaches the clamping target threshold, indicating that the current mold thickness position can meet the clamping force required for mold production.

[0080] In some embodiments, the clamping force is increased by the hydraulic operation of the moving mold plate. When the hydraulic operation of the moving mold plate reaches its upper limit, i.e., when the hydraulic operation of the clamping cylinder reaches its limit, 90% limit, or other set upper limit, the generated clamping force still fails to meet the target clamping force, i.e., the first real-time force value does not reach the clamping target threshold. The working pressure of the clamping cylinder can be obtained from the pressure gauge of the hydraulic system or the external hydraulic control system, indicating that the current hydraulic force of the clamping cylinder is insufficient. Therefore, when the hydraulic operation of the clamping cylinder reaches the set upper limit and the first real-time force value fails to reach the clamping target threshold, the tail plate is controlled to retreat a set distance, which is less than the stroke of the piston movement in the clamping cylinder, to increase the effective working area of ​​the rodless cavity of the clamping cylinder to increase the hydraulic force until the first real-time force value reaches the clamping target threshold. Of course, in practical applications, if the mold clamping force is too large, it is necessary to check the mold stress and appropriately reduce the clamping force. Long-term clamping operation at the maximum rated working pressure may shorten the machine's service life. It is generally recommended to use 80%-85% of the maximum rated pressure.

[0081] Furthermore, the control tailplate retracts a set distance, including:

[0082] When controlling the tail plate to move backward, first release the hydraulic pressure of the mold-locking cylinder, and then control the hydraulic operation of the mold-locking cylinder after moving backward a set distance.

[0083] If the total backward movement distance is less than the stroke of the piston in the mold-locking cylinder, and the total backward movement distance is greater than or equal to the stroke of the piston, it means that when the rodless chamber of the mold-locking cylinder compresses the rod chamber to its limit, the push rod cannot press against the rotating gate to form support. At this time, mold adjustment is stopped, and a fault signal is issued to stop the machine for inspection.

[0084] To better understand the role of the rotary gate in adaptive mold adjustment, in an optional embodiment, the drive rotary gate is switched to the closed state, including:

[0085] When the moving mold cylinder drives the moving mold plate to the first target position, the hydraulic reset of the mold locking cylinder of the moving mold plate is controlled, so that the piston is at the bottom of the mold locking cylinder, one end of the push rod is fixedly connected to the piston, and the other end is located in the limiting hole of the fixed plate of the rotating gate and does not protrude from the limiting hole.

[0086] The rotary gate includes a fixed plate and a rotating plate, as well as a gate cylinder that drives the rotating plate to rotate around the axis of the central hole. When the rotating plate rotates to the closed state (e.g.) Figure 3 (As shown in the state of the rotating gate), the rotating plate body and the fixed plate body overlap to make the rotating plate body block the limiting hole of the fixed plate body; when the rotating plate body rotates to the open state (e.g. Figure 5 (As shown in the state of the rotating gate), the rotating plate and the fixed plate are offset from each other so that the clearance of the rotating plate overlaps with the limiting hole of the fixed plate, so that the push rod can pass through the limiting hole, the clearance, and the through hole of the tail plate to make displacement.

[0087] When the drive rotary gate is switched to the closed state, the push rod is pressed against the rotary plate by the hydraulic force of the mold-locking cylinder, and thus fixed or limited to form a support. The hydraulic force of the mold-locking cylinder acts in the opposite direction on the moving template with the push rod as support, so that the moving template moves in the mold closing direction and / or applies a mold-locking force to the mold.

[0088] Obviously, the above embodiments are merely used to illustrate the adaptive model adjustment method steps 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.

[0089] On the other hand, an adaptive mold adjustment system is also provided in the embodiments of the present invention. This system is used to implement the above embodiments and preferred embodiments, and will not be repeated as described above. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated. An adaptive mold adjustment system provided in this embodiment includes a memory and a processor. The processor executes an adaptive mold adjustment method based on mold size as described in one or more of the above embodiments by calling a control program stored in the memory.

[0090] Optionally, in this embodiment, the processor can be configured to perform the following steps via a control program:

[0091] Determine the target mold thickness movement position;

[0092] A clamping force is applied to the mold through the moving template at the target mold thickness position;

[0093] Obtain the first real-time force value of the current clamping force, and determine whether the first real-time force value has reached the preset clamping target threshold;

[0094] If so, the mold adjustment is complete;

[0095] If not, the target mold thickness movement position is redefined by adjusting the tail plate position until the first real-time force value reaches the mold clamping target threshold.

[0096] On the other hand, the present invention also provides another embodiment: an injection molding machine including a memory and a processor, the processor executing an adaptive mold adjustment method based on mold size as described in one or more of the above embodiments by calling a control program stored in the memory.

[0097] Optionally, in this embodiment, the processor can be configured to perform the following steps via a control program:

[0098] Determine the target mold thickness movement position;

[0099] A clamping force is applied to the mold through the moving template at the target mold thickness position;

[0100] Obtain the first real-time force value of the current clamping force, and determine whether the first real-time force value has reached the preset clamping target threshold;

[0101] If so, the mold adjustment is complete;

[0102] If not, the target mold thickness movement position is redefined by adjusting the tail plate position until the first real-time force value reaches the mold clamping target threshold.

[0103] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0104] The steps of the methods or algorithms 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 both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor such that the processor can read and write information to / from the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and storage medium may reside as discrete components in the user terminal.

[0105] The above disclosures are merely one or more preferred embodiments of the present invention, intended to help understand the inventive concept of the technical solution, and are not intended to limit the present invention in any other way. Any other equivalent or conventional substitution schemes made by those skilled in the art based on the features defined by the present invention shall still fall within the scope of the present invention.

Claims

1. A method for adaptive mold adjustment based on mold size, characterized in that, include: Determining the target mold thickness movement position includes: controlling the mold-moving cylinder of the tail plate to drive the moving platen to move to the first target position, the first target position being preset based on the push rod length of the moving platen and / or a specified distance between the moving platen and the tail platen; driving the rotary gate to switch to the closed state to limit the push rod; driving the tail platen and the moving platen to move in the mold-closing direction through the mold-adjusting device on the tail platen until the mold is closed; acquiring the second real-time force value of the current mold-closing force, and determining whether the second real-time force value reaches the preset mold-adjusting target threshold; when the second real-time force value reaches the mold-adjusting target threshold, determining the current mold thickness position as the target mold thickness movement position; Applying a clamping force to the mold through the moving template at the target mold thickness position includes: controlling the hydraulic operation of the clamping cylinder of the moving template, with the hydraulic integrated valve group on one side of the moving template entering the rodless chamber of the clamping cylinder through the in-plate pipeline, so that the rodless chamber pushes the piston and the push rod fixedly connected to the piston. Since the push rod is limited by the rotating gate, the hydraulic force of the clamping cylinder pushes the moving template in the opposite direction with the push rod as support, applying a clamping force to the mold. Obtain the first real-time force value of the current clamping force, and determine whether the first real-time force value has reached the preset clamping target threshold; If so, the mold adjustment is complete; If not, the clamping force is increased by the hydraulic operation of the moving template. When the hydraulic operation of the moving template reaches the upper limit, the target mold thickness movement position is re-determined by adjusting the tail plate position. This includes: when the hydraulic operation of the clamping cylinder reaches the set upper limit, if the first real-time force value fails to reach the clamping target threshold, the tail plate is controlled to retreat a set distance. This set distance is less than the stroke of the piston movement in the clamping cylinder, which is used to increase the effective working area of ​​the rodless cavity of the clamping cylinder to increase the hydraulic force until the first real-time force value reaches the clamping target threshold.

2. The adaptive mold adjustment method according to mold size as described in claim 1, characterized in that, The step of determining whether the first real-time force value has reached the preset mold-locking target threshold includes: The first real-time force value is obtained by a clamping force sensor mounted on the tie rod; When the moving template applies clamping force to the mold, the clamping force starts from the mold adjustment target threshold when the target mold thickness is determined to move to the desired position, and increases until the first real-time force value reaches the clamping target threshold. This indicates that the current mold thickness position can meet the clamping force required for mold production.

3. The adaptive mold adjustment method according to mold size as described in claim 1, characterized in that, The control tailplate retracts a set distance, including: When controlling the tail plate to move backward, first release the hydraulic pressure of the mold-locking cylinder, and then control the hydraulic operation of the mold-locking cylinder after moving backward a set distance. If the mold retraction is repeated multiple times and the total retraction distance is less than the stroke of the piston in the mold-locking cylinder, the mold adjustment will stop and a fault signal will be issued to stop the machine for inspection when the total retraction distance is greater than or equal to the stroke of the piston.

4. The adaptive mold adjustment method according to mold size as described in claim 1, characterized in that, Switching the drive rotary gate to the closed state includes: When the moving mold cylinder drives the moving mold plate to the first target position, the hydraulic reset of the mold locking cylinder of the moving mold plate is controlled, so that the piston is at the bottom of the mold locking cylinder, one end of the push rod is fixedly connected to the piston, and the other end is located in the limiting hole of the fixed plate of the rotating gate and does not protrude from the limiting hole. The rotary gate includes a fixed plate and a rotating plate, as well as a gate cylinder that drives the rotating plate to rotate around the central hole axis. When the rotating plate rotates to the closed state, the rotating plate and the fixed plate overlap to block the limiting hole of the fixed plate. When the rotating plate rotates to the open state, the rotating plate and the fixed plate are offset to overlap the clearance of the rotating plate and the limiting hole of the fixed plate, so that the push rod can pass through the limiting hole, the clearance, and the through hole of the tail plate to make displacement. When the drive rotary gate is switched to the closed state, the push rod is pressed against the rotary plate by the hydraulic force of the mold-locking cylinder, and thus fixed or limited to form a support. The hydraulic force of the mold-locking cylinder acts in the opposite direction on the moving mold plate with the push rod as support, so that the moving mold plate moves in the mold closing direction and / or applies a mold-locking force to the mold.

5. The adaptive mold adjustment method according to mold size as described in claim 1, characterized in that, The method of driving the tail plate and the moving template to move in the mold closing direction via the tail plate adjusting device includes: The tail plate moves in the mold closing direction through the mold adjustment device. The closed rotary gate pushes the push rod to move accordingly. The moving plate is pushed and the piston pushes it to move towards the mold until the reading of the plate position ruler no longer changes, indicating that the mold is closed. By monitoring the second real-time force value of the clamping force, when the second real-time force value reaches the target threshold for mold adjustment, the tail plate is controlled to retreat a set distance by the mold adjustment device based on the current mold thickness position as the reference, which is the reserved hydraulic space of the rodless cavity of the clamping cylinder; the current mold thickness position is determined as the target mold thickness movement position.

6. An adaptive model adjustment system, characterized in that, The device includes a memory and a processor, characterized in that: the processor executes an adaptive mold adjustment method according to any one of claims 1-5 by calling a control program stored in the memory.

7. An injection molding machine, comprising a memory and a processor, characterized in that: The processor executes an adaptive mold adjustment method based on mold size as described in any one of claims 1-5 by calling a control program stored in the memory.

Images