Die adjusting structure of die casting machine and die casting machine

Abstract

The application provides a die-casting machine die adjusting structure and a die-casting machine. The die-casting machine die adjusting structure comprises a tail plate, four guide columns, an adjusting nut and a die adjusting assembly. The tail plate has four stepped holes. A gland is arranged on each stepped hole. A large hole section of the stepped hole and the gland form a containing cavity. A first adjusting opening is arranged on the gland. The four guide columns are respectively arranged in the four stepped holes. The adjusting nut is threadedly connected to the guide column. A nut gear is arranged on the outer surface of the adjusting nut. The adjusting nut is located in the containing cavity. The die adjusting assembly comprises a die adjusting gear and a driving assembly. The die adjusting gear extends into the containing cavity from the first adjusting opening to engage with the nut gear. The driving assembly is arranged on the tail plate. The driving assembly has a driving shaft and a rotation angle detection device. The driving shaft is connected to the die adjusting gear. The rotation angle detection device is used to detect the rotation angle of the driving shaft. The application solves the problem that the die adjusting process of the existing die-casting machine needs manual participation and is complicated.

Description

Technical Field

[0001] This application relates to the field of die casting machine technology, and in particular to a die casting machine mold adjustment structure and a die casting machine. Background Technology

[0002] A die-casting machine is a machine that injects molten metal into a mold under pressure, where it cools and solidifies, resulting in a solid metal casting after the mold is opened. Because mold opening and closing are required, the moving and stationary molds mounted on the die-casting machine often need to be driven by a mold-adjusting mechanism.

[0003] Currently, most die-casting machines on the market use hydraulic cylinders and other power components to directly open and close the mold. This means that the adjusting nuts connected to the four main rods are adjusted simultaneously. Although this allows the mold to move along the four main rods, due to factors such as machine assembly and mold size, the adjusting nuts connected to the four main rods may not be coplanar before mold adjustment. This results in different clamping forces on the four main rods after mold adjustment and locking, requiring manual adjustment of one or more adjusting nuts individually, which is tedious. Utility Model Content

[0004] This application provides a die-casting machine mold adjustment structure and a die-casting machine, which solves the problem that the mold adjustment process of existing die-casting machines requires manual intervention and is cumbersome.

[0005] This application is implemented as follows: a die-casting machine mold adjustment structure includes a tail plate, four guide pillars, an adjusting nut, and a mold adjustment assembly. The tail plate has four stepped holes, each with a pressure cap. A receiving cavity is formed between the larger section of the stepped hole and the pressure cap. The pressure cap has a first adjustment port. The four guide pillars are respectively inserted through the four stepped holes. The adjusting nut is threaded to the guide pillars, and a nut gear is provided on the outer surface of the adjusting nut. The adjusting nut is located within the receiving cavity. The mold adjustment assembly includes an adjusting gear and a drive assembly. The adjusting gear extends from the first adjustment port into the receiving cavity to mesh with the nut gear. The drive assembly is located on the tail plate. The drive assembly has a drive shaft and a rotation angle detection device. The drive shaft is connected to the adjusting gear, and the rotation angle detection device is used to detect the rotation angle of the drive shaft.

[0006] In one embodiment, the drive assembly includes a motor base, a mold adjusting motor, and a rotation angle detection device, wherein the motor base is disposed on the tail plate, and the mold adjusting motor is disposed on the motor base;

[0007] The motor base has a first hollow cavity and a second adjustment port, the mold adjustment gear is located in the first hollow cavity, and the mold adjustment gear extends out from the second adjustment port;

[0008] The mold adjustment motor has a drive shaft that extends into the first hollow cavity and is connected to the mold adjustment gear.

[0009] The rotation angle detection device is used to detect the rotation angle of the drive shaft.

[0010] In one embodiment, the rotation angle detection device is connected to the drive shaft;

[0011] Alternatively, the rotation angle detection device can be connected to the mold adjustment gear;

[0012] Alternatively, the rotation angle detection device is connected to the adjusting nut.

[0013] In one embodiment, the drive assembly includes a motor mount and a motor, the motor mount being disposed on the tail plate and the motor being disposed on the motor mount;

[0014] The motor base has a second hollow cavity and a third adjustment port, the mold adjustment gear is located in the second hollow cavity, and the mold adjustment gear extends out from the third adjustment port;

[0015] The motor has a drive shaft and a rotation angle detection device. The drive shaft extends into the first hollow cavity and is connected to the mold adjustment gear. The rotation angle detection device is used to detect the rotation angle of the drive shaft.

[0016] In one embodiment, the motor is a servo motor or a stepper motor.

[0017] In one embodiment, the rotation angle detection device is a rotary encoder.

[0018] In one embodiment, the die-casting machine mold adjustment structure further includes a clamping force monitoring device, which is disposed on the guide post and is used to monitor the clamping force of the guide post after mold clamping.

[0019] In one embodiment, a gap is provided between the adjusting nut located in the accommodating cavity and the wall of the large hole section of the stepped hole.

[0020] In one embodiment, a gap is provided between the guide post and the small hole section wall of the stepped hole.

[0021] This application embodiment also provides a die-casting machine, including a die-casting machine mold adjustment structure, a head plate, a middle plate, and a crank mechanism as described in any of the above embodiments. The head plate is connected to the end of the four guide posts away from the tail plate. The middle plate is sleeved on the four guide posts and is located between the tail plate and the head plate. The side surface of the middle plate near the head plate is used to connect the moving mold of the die to be die-cast. The crank mechanism is connected between the tail plate and the middle plate.

[0022] The advantages of the die-casting machine mold adjustment structure and die-casting machine provided in this application are as follows: Compared with the prior art, the tail plate of this application is provided with four guide pillars, each of which is threaded with an adjusting nut, and each adjusting nut is provided with a corresponding mold adjustment component. The mold adjustment gear of the mold adjustment component meshes with the nut gear of the adjusting nut. The driving component of the mold adjustment component can drive the mold adjustment gear to rotate, thereby driving the adjusting nut to rotate. Since the adjusting nut is located between the stepped hole and the pressure plate on the tail plate, the tail plate will move along the axial direction of the guide pillar together with the adjusting nut when the adjusting nut rotates. In this way, the relative position of each adjusting nut on the guide pillar can be adjusted individually, so that the clamping force of each guide pillar is the same after the mold is locked. The entire mold adjustment process does not require manual intervention, making mold adjustment simpler and more efficient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the die-casting machine provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the die-casting machine mold adjustment structure provided in the embodiments of this application;

[0025] Figure 3 This is an exploded view of the die-casting machine mold adjustment structure provided in the embodiments of this application;

[0026] Figure 4 yes Figure 3 The left view;

[0027] Figure 5 yes Figure 4 AA section diagram;

[0028] Figure 6 This is a circuit diagram of the die-casting machine mold adjustment structure provided in the embodiments of this application.

[0029] Reference numerals: 20, head plate; 30, middle plate; 40, crank mechanism; 100, moving mold; 10, die-casting machine mold adjustment structure; 11, tail plate; 110, stepped hole; 111, pressure cap; 1110, first adjustment port; 12, guide post; 13, adjusting nut; 130, nut gear; 14, mold adjustment gear; 151, motor base; 1510, second adjustment port; 152, motor base; 1520, third adjustment port; 161, mold adjustment motor; 162, motor; 17, drive shaft; 181, rotation angle detection device; 182, clamping force monitoring device; 19, controller. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0035] refer to Figure 1 This application provides a die-casting machine, including a die-casting machine mold adjustment structure 10, a head plate 20, a middle plate 30, and a crank mechanism 40. The die-casting machine mold adjustment structure 10 includes four guide pillars 12 and a tail plate 11. The four corners of the tail plate 11 and the middle plate 30 are respectively movably fitted onto the four guide pillars 12, thereby allowing the tail plate 11 and the middle plate 30 to move horizontally on the guide pillars 12. The head plate 20 is connected to the end of the four guide pillars 12 away from the tail plate 11. The middle plate 30 is located between the tail plate 11 and the head plate 20, and the side surface of the middle plate 30 near the head plate 20 is used to connect the moving mold 100 of the die-casting mold. The crank mechanism 40 is connected between the tail plate 11 and the middle plate 30.

[0036] The crank mechanism 40 can be composed of multiple connecting rods. In addition, a wear-reducing ring is installed between the tail plate 11 and the guide post 12 to reduce wear between them. The head plate 20 is fixedly mounted on the guide post 12, and one end of the crank mechanism 40 is fixedly connected to the tail plate 11 by a pin, while the other end is fixedly connected to the middle plate 30 by a pin.

[0037] In actual use, the die-casting machine of this embodiment can move the middle plate 30 closer to the tail plate 11 by adjusting the crank mechanism 40, so that the moving mold 100 of the die-casting mold is separated from the fixed mold mounted on the machine platform, i.e., mold opening. Then the moving mold 100 is replaced. Since the size of the replaced moving mold 100 may change, a mold adjustment operation is required before re-locking the mold, i.e., adjusting the locking force of the four guide pillars 12. Since the guide pillars 12 are threaded with adjusting nuts 13, and the relative position of the adjusting nuts 13 and the tail plate 11 is limited, the... By rotating the adjusting nut 13, the adjusting nut 13 and the tail plate 11 can move together along the axial direction of the guide post 12, thereby adjusting the clamping force of the guide post 12. The tail plate 11 is connected to the middle plate 30, so the middle plate 30 will also move along the axial direction of the guide post 12, causing the distance between the moving mold 100 and the fixed mold to change. By rotating and adjusting the adjusting nut 13 connected to each guide post 12, the distance between each position of the moving mold 100 and the fixed mold can be kept consistent, thereby ensuring that the clamping force on each guide post 12 remains consistent after clamping.

[0038] After the mold adjustment is completed, the crank mechanism 40 can be further adjusted to bring the middle plate 30 closer to the head plate 20 to achieve mold locking. After mold locking, the clamping force of each guide post 12 can be tested. If the clamping force of the four guide posts 12 is not balanced, the adjusting nut 13 can be adjusted according to the above steps to finally achieve the same clamping force of the four guide posts 12 after mold locking.

[0039] It can be seen that the key to keeping the clamping force of the four guide pillars 12 consistent is to adjust the relative position of the adjusting nuts 13 connected to the four guide pillars 12 on the guide pillars 12 to be consistent.

[0040] Currently, the traditional mold adjustment structure includes a gear set and one or more drive motors mounted on the tail plate 11. The gear set includes a large gear and four small gears. The four small gears mesh with the large gear, and the four small gears mesh with the nut gears 130 on the outer surface of the adjusting nuts 13 connected to the four large levers. The large gear is driven to rotate by the drive motor. When the large gear rotates, it will drive the four small gears to rotate, thereby driving the adjusting nuts 13 to rotate. In this way, the four adjusting nuts 13 rotate simultaneously by the same number of revolutions.

[0041] To ensure that the clamping force on the four main clamping rods is the same during mold clamping, the relative positions of the adjusting nuts 13 on the four main clamping rods must be kept as consistent as possible during mold adjustment. However, due to factors such as machine assembly and mold size, the relative positions of the adjusting nuts 13 on the four main clamping rods are often different before mold adjustment. Rotating all four adjusting nuts 13 simultaneously during mold adjustment will result in different relative positions of the adjusting nuts 13 on the four main clamping rods after adjustment. In this case, it is necessary to rotate one or more adjusting nuts 13 individually to ensure that the relative positions of the adjusting nuts 13 on the four main clamping rods are consistent. For traditional mold adjustment structures, the gear set needs to be disassembled to adjust a single adjusting nut 13 individually, and then reinstalled after adjustment, which is cumbersome and seriously affects the efficiency of mold adjustment.

[0042] Therefore, this application provides a die-casting machine mold adjustment structure 10, which can be used in the die-casting machine described in the above embodiments, solving the problem that the mold adjustment process of existing die-casting machines requires manual intervention and is cumbersome.

[0043] refer to Figure 2 and Figure 3 The die-casting machine mold adjustment structure 10 provided in this application embodiment includes a tail plate 11, four guide pillars 12, an adjusting nut 13, and a mold adjustment assembly. The tail plate 11 has four stepped holes 110, and a pressure cap 111 is provided on the stepped holes 110. A receiving cavity is formed between the large hole section of the stepped hole 110 and the pressure cap 111. A first adjustment port 1110 is provided on the pressure cap 111. The four guide pillars 12 are respectively inserted into the four stepped holes 110. The adjusting nut 13 is threaded to the guide pillars 12. A nut gear 130 is provided on the outer surface of the adjusting nut 13. The adjusting nut 13 is located in the receiving cavity. The mold adjustment assembly includes a mold adjustment gear 14 and a drive assembly. The mold adjustment gear 14 extends into the receiving cavity from the first adjustment port 1110 to mesh with the nut gear 130. The drive assembly is provided on the tail plate 11. The drive assembly has a drive shaft 17 and a rotation angle detection device 181. The drive shaft 17 is connected to the mold adjustment gear 14. The rotation angle detection device 181 is used to detect the rotation angle of the drive shaft 17.

[0044] The pressure cap 111 is a shell-like object with a cavity, not a flat plate. The pressure cap 111 can be bolted to the tail plate 11, so that the pressure cap 111 covers the stepped hole 110. In this way, the large hole section of the stepped hole 110 will communicate with the cavity of the pressure cap 111 to form a receiving cavity. The adjusting nut 13 is located in the receiving cavity. Even if the adjusting nut 13 rotates, it will not leave the receiving cavity. That is to say, the relative position of the adjusting nut 13 and the tail plate 11 is limited. When the adjusting nut 13 rotates and moves along the axial direction of the guide post 12, the tail plate 11 will move along the axial direction of the guide post 12 together with the adjusting nut 13.

[0045] The surface of the tail plate 11 can be square. Stepped holes 110 are provided at the four corners of the surface of the tail plate 11. The four stepped holes 110 are the same in shape, which can be circular. The diameter and length of the large hole section of the four stepped holes 110 are the same, and the diameter and length of the small hole section of the four stepped holes 110 are also the same. The dimensions of the four guide posts 12 are also set to be the same. In this way, the same material and mold can be used to manufacture the guide posts 12, which improves the manufacturing efficiency of the guide posts 12.

[0046] The lines connecting the centers of the stepped holes 110 at the four corners of the tail plate 11 form a quadrilateral, such as a rectangle. This allows the distance the four corners of the tail plate 11 move on the guide post 12 to be adjusted so that the distance between each position of the middle plate 30 connected to the tail plate 11 and the head plate 20 is the same, thereby improving the mold-locking effect.

[0047] The mold adjustment principle of the die-casting machine mold adjustment structure 10 in this application embodiment is as follows: Before mold adjustment, the clamping force of each guide post 12 can be tested first, and then the mold is opened. In the mold-open state, the mold adjustment gear 14 is driven to rotate by the drive shaft 17 of the mold adjustment assembly. The mold adjustment gear 14 meshes with the nut gear 130 provided on the outer surface of the adjusting nut 13, so it will drive the adjusting nut 13 to rotate, thereby causing the adjusting nut 13 to move along the axial direction of the guide post 12. Because of the relative position restriction between the adjusting nut 13 and the tail plate 11, that is, the adjusting nut 13 will still be in the accommodating cavity when it rotates, so the tail plate 11 will move along the axial direction of the guide post 12 together with the adjusting nut 13. Since each guide post 12 is connected to an adjusting nut 13, and each adjusting nut 13 is equipped with a corresponding mold adjustment component, each adjusting nut 13 can be adjusted individually. This allows the adjusting nut 13 on the guide post 12 to rotate a different number of turns according to the different clamping forces of the guide post 12, thereby moving a different distance in the axial direction of the guide post 12. In this way, after mold adjustment, the clamping force of the four guide posts 12 can be kept consistent by re-clamping.

[0048] Furthermore, if the clamping forces of the four guide pillars 12 are found to be different after mold closing, only the clamping forces of individual guide pillars 12 need to be fine-tuned. Specifically, the mold can be opened first, and then the position of the adjusting nut 13 connected to the guide pillar 12 whose clamping force needs to be adjusted can be adjusted individually to ensure that the clamping forces of the four guide pillars 12 are consistent after mold closing. In this way, if the requirements are not met after one mold adjustment, the clamping forces of individual guide pillars 12 can be fine-tuned again to ensure that the clamping forces of the four guide pillars 12 are consistent. The mold adjustment accuracy is higher, and compared with the traditional mold adjustment structure, the mold adjustment process of the mold adjustment structure in this embodiment is simpler.

[0049] Understandably, the clamping force of the guide pillar 12 refers to the total pressure applied to the mold parting surface by the guide pillar 12 through the mold closing mechanism (such as a toggle, hydraulic cylinder, etc.), typically measured in tons (tons) or kilonewtons (kN) (1 ton ≈ 9.8 kN). Its function is to prevent the high pressure of the molten metal (usually hundreds to thousands of bar) from forcing the mold open, resulting in flash or defects. The consequences of insufficient clamping force include flash (burrs): molten metal overflowing from the mold parting surface; mold deformation: reduced mold life, affecting casting accuracy; and guide pillar 12 fracture: overload or fatigue accumulation may lead to fracture.

[0050] In this embodiment, the guide pillars 12 serve several functions, including bearing clamping force: The guide pillars 12 must possess high tensile strength, typically made of alloy steel (such as 42CrMo) and heat-treated. They must also ensure parallelism: the four guide pillars 12 must be evenly stressed to prevent uneven loading that could cause mold deformation or machine damage. Furthermore, they must withstand dynamic loads: during high-speed mold closing / opening, they must withstand alternating stresses, requiring consideration of fatigue strength. In this embodiment, adjusting the position of the adjusting nuts 13 on the four guide pillars 12 ensures that the force on the four guide pillars 12 is uniform, preventing uneven loading that could cause mold deformation or machine damage.

[0051] It should be noted that the drive assembly in this embodiment includes a rotation angle detection device 181. The rotation angle detection device 181 can continuously detect the rotation angle of the drive shaft 17, or it can be understood that the rotation angle detection device 181 detects the rotation angle of the drive shaft 17 in real time. The rotation angle here refers to the total angle of rotation of the drive shaft 17 during the entire process of driving the mold adjustment gear 14. For example, if the drive shaft 17 rotates one revolution, the detected rotation angle of the drive shaft 17 is 360°; if the drive shaft 17 rotates two revolutions, the detected rotation angle of the drive shaft 17 is 720°.

[0052] Since the clamping force of the four guide pillars 12 can be calculated after detection to determine the direction and distance that the adjusting nut 13 on each guide pillar 12 needs to move, the clamping force of the four guide pillars 12 can be kept consistent. Therefore, after obtaining the direction and distance that each adjusting nut 13 needs to move, the number of rotations that each adjusting nut 13 needs to rotate can be calculated and converted into the angle that the drive shaft 17 needs to rotate. In this way, precise control of the moving distance of the adjusting nut 13 can be achieved by precisely controlling the rotation angle of the drive shaft 17.

[0053] Based on this, during the process of the drive shaft 17 driving the mold adjustment gear 14 to rotate, thereby causing the adjusting nut 13 to rotate, the rotation angle detection device 181 continuously detects the rotation angle of the drive shaft 17 in the target direction. When the rotation angle of the drive shaft 17 in the target direction reaches the calculated target angle, the drive shaft 17 can be controlled to stop rotating in time to avoid the adjusting nut 13 rotating more times and moving a greater distance, thus avoiding the workload caused by readjustment.

[0054] In some embodiments, reference Figure 3 The drive assembly includes a motor base 151, a mold adjusting motor 161, and a rotation angle detection device 181. The motor base 151 is mounted on the tail plate 11, and the mold adjusting motor 161 is mounted on the motor base 151. The motor base 151 has a first hollow cavity and a second adjustment port 1510. The mold adjusting gear 14 is located in the first hollow cavity and extends out from the second adjustment port 1510. The mold adjusting motor 161 has a drive shaft 17, which extends into the first hollow cavity and is connected to the mold adjusting gear 14. The rotation angle detection device 181 is used to detect the rotation angle of the drive shaft 17.

[0055] It should be noted that the mold adjusting motor 161 can be vertically mounted on the motor base 151, thus fixing the position of the mold adjusting motor 161. This ensures that the drive shaft 17 of the mold adjusting motor 161 will not shift during rotation, and will not affect the rotation of the mold adjusting gear 14. Since the mold adjusting motor 161 rotates at a relatively high speed, it is impossible to accurately adjust the movement distance of the adjusting nut 13 by observing the movement distance of the adjusting nut 13 with the naked eye. Therefore, the rotation angle detection device 181 can detect the rotation angle of the drive shaft 17. When the rotation angle of the drive shaft 17 reaches the target value, it means that the adjusting nut 13 has been adjusted to the target position, thereby timely controlling the mold adjusting motor 161 to stop working, so that the adjusting nut 13 stops at the target position on the guide post 12, achieving precise adjustment of the adjusting nut 13.

[0056] The above-mentioned adjustment process of adjusting nut 13 does not require manual intervention. It can automatically move the adjusting nut 13 on the guide post 12 to the target direction and distance, which greatly improves the simplicity and efficiency of mold adjustment.

[0057] For example, the mold adjustment motor 161 can be a three-phase asynchronous motor, equipped with an electromagnetic brake, and the mold position can be adjusted by controlling the forward and reverse rotation via PLC.

[0058] In this embodiment, since the function of the rotation angle detection device 181 is to detect the rotation angle of the drive shaft 17, and the rotation of the drive shaft 17, the mold adjustment gear 14 and the adjusting nut 13 are synchronized, that is, the rotation angle of the drive shaft 17 is equivalent to the rotation angle of the mold adjustment gear 14 or the rotation angle of the adjusting nut 13. Therefore, when the mold adjustment motor 161 drives the mold adjustment gear 14 to rotate, the rotation angle detection device 181 can be set at multiple locations.

[0059] In some embodiments, the rotation angle detection device 181 is connected to the drive shaft 17. This allows the rotation angle of the drive shaft 17 to be detected directly when the drive shaft 17 rotates, resulting in more accurate detection results.

[0060] In some embodiments, the rotation angle detection device 181 is connected to the mold adjustment gear 14. Since the mold adjustment gear 14 is connected to the drive shaft 17, the rotation angle detection device 181 can also obtain the rotation angle of the drive shaft 17 by detecting the rotation angle of the mold adjustment gear 14.

[0061] In some embodiments, the rotation angle detection device 181 is connected to the adjusting nut 13. Since the mold adjustment gear 14 is connected to the drive shaft 17, and the mold adjustment gear 14 also meshes with the nut gear 130 on the outer side of the adjusting nut 13, the rotation angle of the adjusting nut 13 is the same as the rotation angle of the drive shaft 17. Therefore, the rotation angle detection device 181 can also obtain the rotation angle of the drive shaft 17 by detecting the rotation angle of the adjusting nut 13.

[0062] In some embodiments, reference Figure 3 The drive assembly includes a motor mount 152 and a motor 162. The motor mount 152 is mounted on the tail plate 11, and the motor 162 is mounted on the motor mount 152. The motor mount 152 has a second hollow cavity and a third adjustment port 1520. The mold adjustment gear 14 is located in the second hollow cavity and extends out from the third adjustment port 1520. The motor has a drive shaft 17 and a rotation angle detection device 181. The drive shaft 17 extends into the first hollow cavity and is connected to the mold adjustment gear 14. The rotation angle detection device 181 is used to detect the rotation angle of the drive shaft 17.

[0063] It should be noted that the motor 162 can be vertically mounted on the motor base 152, thus fixing the position of the motor and ensuring that the drive shaft 17 of the motor 162 will not shift during rotation, thus not affecting the rotation of the mold adjustment gear 14. The motor 162 used in this application has a built-in rotation angle detection device 181, eliminating the need for an additional rotation angle detection device 181. This device can detect the rotation angle of the drive shaft 17 during rotation of the motor 162. When the rotation angle of the drive shaft 17 reaches the target value, it indicates that the adjusting nut 13 has been adjusted to the target position, thereby timely controlling the motor 162 to stop working and keeping the adjusting nut 13 at the target position on the guide post 12, achieving precise adjustment of the adjusting nut 13. Furthermore, it reduces the cost of setting up an additional rotation angle detection device 181 and reduces the installation workload of the die-casting machine mold adjustment structure 10.

[0064] The above-mentioned adjustment process of adjusting nut 13 does not require manual intervention. It can automatically move the adjusting nut 13 on the guide post 12 to the target direction and distance, which greatly improves the simplicity and efficiency of mold adjustment.

[0065] For example, motor 162 can be a servo motor or a stepper motor.

[0066] In some embodiments, the rotation angle detection device 181 is a rotary encoder.

[0067] A rotary encoder is a sensor used to detect the position, speed, and direction of rotational motion. It is widely used in industrial control, robotics, CNC machine tools, and consumer electronics (such as volume knobs). Its core function is to convert mechanical rotation into electrical signals (digital or analog) for the control system to read and process.

[0068] The embodiment of this application uses a rotary encoder as the rotation angle detection device 181, which can not only accurately detect the rotation angle of the drive shaft 17, but also has a relatively common structure for workers, making it easier to install and improving the installation efficiency of the mold adjustment structure.

[0069] In some embodiments, reference Figure 6 The die-casting machine mold adjustment structure 10 also includes a controller 19, which is electrically connected to the drive shaft 17 and the rotation angle detection device 181.

[0070] It should be noted that the controller 19 is electrically connected to the drive shaft 17 and the rotation angle detection device 181. When the adjusting nut 13 needs to be rotated, the controller 19 can control the drive shaft 17 to rotate. When the drive shaft 17 rotates, the rotation angle detection device 181 will detect the rotation angle of the drive shaft 17. When the rotation angle of the drive shaft 17 reaches the target, the rotation angle detection device 181 will send a feedback signal to the controller 19. The controller 19 will then control the drive shaft 17 to stop rotating, thereby stopping the rotation of the adjusting nut 13. In this way, the number of rotations of the adjusting nut 13 can accurately reach the target value. That is, after the adjusting nut 13 moves along the axial direction of the guide post 12, it can accurately reach the target position, realizing precise automatic adjustment of the adjusting nut 13. This not only reduces the workload of manual adjustment, but also improves the accuracy and efficiency of adjustment.

[0071] It is understandable that, since each adjusting nut 13 has a corresponding mold-adjusting component, that is, each adjusting nut 13 corresponds to a drive shaft 17 and a mold-adjusting gear 14, and each drive shaft 17 is electrically connected to the controller 19, in order to improve mold-adjusting efficiency, the controller 19 can control the four drive shafts 17 to rotate synchronously, so that the four adjusting nuts 13 are rotated synchronously to move the same distance in the axial direction of the guide post 12. Then, each adjusting nut 13 can be rotated individually, so that the relative positions of the four adjusting nuts 13 on the guide post 12 remain consistent. Of course, the controller 19 can also control the four drive shafts 17 to rotate at different angles to adjust the four adjusting nuts 13 to the target position on the guide post 12 at once, thus completing the mold adjustment. Alternatively, the controller 19 can sequentially and individually control the four drive shafts 17 to rotate at the required angles, adjusting the four adjusting nuts 13 to the target position on the guide post 12 respectively, thus completing the mold adjustment.

[0072] In some embodiments, reference Figures 4-6 The die-casting machine mold adjustment structure 10 also includes a clamping force monitoring device 182, which is located on the guide post 12 and is used to monitor the clamping force of the guide post 12 after mold clamping.

[0073] It should be noted that the clamping force monitoring device 182 is electrically connected to the controller 19. In this embodiment, a clamping force monitoring device 182 is provided on each guide post 12. By providing the clamping force monitoring device 182 on the guide post 12, the clamping force of the guide post 12 can be detected after the die-casting machine clamps the mold. The detected clamping force value of the guide post 12 is transmitted to the controller 19. The controller 19 compares the clamping forces of the four guide posts 12. If the clamping forces of the four guide posts 12 are the same, it means that the die-casting machine can start working and does not need to be adjusted again. If the clamping forces of the four guide posts 12 are different, it means that the die-casting machine can start working and does not need to be adjusted again. Since the clamping forces of the four guide pillars 12 are different, the controller 19 will analyze the clamping force values ​​of the four guide pillars 12 to obtain the adjustment value that the clamping force of each guide pillar 12 needs to be increased or decreased. Based on the adjustment value that the clamping force of each guide pillar 12 needs to be adjusted, the controller 19 will determine the target direction and target distance that the adjusting nut 13 connected to the guide pillar 12 needs to move in the axial direction of the guide pillar 12. This will allow the controller to calculate the number of rotations that each adjusting nut 13 needs to rotate, and then determine the angle that the drive shaft 17 corresponding to each adjusting nut 13 needs to rotate, so as to prepare for the next mold adjustment.

[0074] Furthermore, if the clamping forces of the four guide pillars 12 are different, the mold needs to be adjusted again. First, the mold needs to be opened, and then the controller 19 controls each drive shaft 17 to rotate. The rotation angle detection device 181 detects the rotation angle of each drive shaft 17 so that each drive shaft 17 can rotate to the angle required by each drive shaft 17 as described above. This allows the adjusting nut 13 connected to each guide pillar 12 to rotate the target number of turns and reach the target position on the guide pillar 12, thus completing the mold adjustment. This mold adjustment is to fine-tune the movement distance of the adjusting nut 13 so that the clamping force of the four guide pillars 12 is consistent after the mold is closed.

[0075] In this embodiment, the four adjusting nuts 13 are adjusted separately using independent mold-adjusting components. This allows for individual fine-tuning of the adjusting nuts 13 on one or more guide pillars 12 whose clamping forces are uneven after mold adjustment and locking. Compared to the prior art where all four adjusting nuts 13 are adjusted simultaneously, requiring the removal of the entire mold-adjusting structure and manual adjustment for even a single nut, which is cumbersome, inefficient, and reduces accuracy, this embodiment provides a mold-adjusting component for each adjusting nut 13. Each nut 13 can be adjusted independently, allowing for differentiated adjustments based on the distance and direction of movement required, ensuring consistent clamping forces across the four guide pillars 12. The entire mold-adjusting process is automated, eliminating the need for manual rotation of the adjusting nuts 13, thus improving both efficiency and accuracy.

[0076] For example, the clamping force monitoring device 182 can be a clamping force sensor, such as a piezoelectric sensor or a strain gauge sensor. The clamping force monitoring device 182 can be disposed on the surface of the guide post 12 or embedded inside the guide post 12; the specific choice depends on the structure of the clamping force monitoring device 182, and this embodiment does not impose a specific limitation. The clamping force monitoring device 182 can not only monitor the clamping force of each guide post 12 after clamping to determine whether further mold adjustment is needed, but also measure the pressure applied when the mold closes in real time during the clamping process, ensuring that it remains within the set range and does not damage the mold.

[0077] In some embodiments, reference Figure 5 A gap D is provided between the adjusting nut 13 located in the accommodating cavity and the wall of the large hole section of the stepped hole 110; a gap D is provided between the guide post 12 and the wall of the small hole section of the stepped hole 110.

[0078] It should be noted that the adjusting nut 13 is located inside the accommodating cavity, so the tail plate 11 can move along the axial direction of the guide post 12 together with the adjusting nut 13. The adjusting nut 13 needs to rotate around the guide post 12 inside the accommodating cavity. Therefore, a gap D is set between the adjusting nut 13 and the large hole section wall of the stepped hole 110 to ensure that the adjusting nut 13 will not rub against the large hole section wall of the stepped hole 110 during rotation, and will not hinder the rotation speed of the adjusting nut 13, making the rotation of the adjusting nut 13 smoother.

[0079] Furthermore, during the mold adjustment process, the guide post 12 remains stationary. When the adjusting nut 13 is rotated, the tail plate 11 moves along the axial direction of the guide post 12 together with the adjusting nut 13. As a result, friction occurs between the guide post 12 and the small hole wall of the stepped hole 110, affecting the moving speed of the tail plate 11. In this application, a gap D is provided between the guide post 12 and the small hole wall of the stepped hole 110. This reduces the friction between the tail plate 11 and the small hole wall of the stepped hole 110 during movement, making the movement of the tail plate 11 smoother.

[0080] Furthermore, since the tail plate 11 and the middle plate 30 are connected by the crank mechanism 40, the middle plate 30 will also move during the movement of the tail plate 11. Similarly, a gap can be set between the hole wall of the hole through which the guide post 12 passes and the guide post 12 on the middle plate 30. In this way, when the tail plate 11 moves and drives the middle plate 30 to move, both the tail plate 11 and the middle plate 30 can move smoothly, thereby making the mold adjustment smoother.

[0081] To ensure smooth mold adjustment, the mold adjustment motor 161 or electric motor needs sufficient driving force so that the adjusting nut 13 can rotate smoothly under the drive of the mold adjustment gear 14, thus ensuring smooth mold adjustment. The mold adjustment motor 161 or electric motor is electrically connected to the controller 19. When the controller 19 controls the drive shaft 17 to rotate, if it finds that the rotation of the drive shaft 17 is slow and the resistance is high, the controller 19 can control the working power of the mold adjustment motor 161 or electric motor to increase the driving force of the drive shaft 17, so that the adjusting nut 13 can rotate around the guide post 12, thereby moving smoothly along the axial direction of the guide post 12. In this way, all four adjusting nuts 13 can move smoothly along the axial direction of the guide post 12, which allows the tail plate 11 to move smoothly along the axial direction of the guide post 12, making the mold adjustment smoother.

[0082] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A die-casting machine mold adjustment structure, characterized in that, include: The tail plate (11) has four stepped holes (110), and a pressure cap (111) is provided on the stepped holes (110). A receiving cavity is formed between the large hole section of the stepped hole (110) and the pressure cap (111). A first adjustment port (1110) is provided on the pressure cap (111). Four guide posts (12) are respectively inserted into the four stepped holes (110); An adjusting nut (13) is threaded to the guide post (12). The outer surface of the adjusting nut (13) is provided with a nut gear (130). The adjusting nut (13) is located in the accommodating cavity. The mold adjustment assembly includes a mold adjustment gear (14) and a drive assembly. The mold adjustment gear (14) extends from the first adjustment port (1110) into the receiving cavity to mesh with the nut gear (130). The drive assembly is disposed on the tail plate (11). The drive assembly has a drive shaft (17) and a rotation angle detection device (181). The drive shaft (17) is connected to the mold adjustment gear (14). The rotation angle detection device (181) is used to detect the rotation angle of the drive shaft (17).

2. The die-casting machine mold adjustment structure according to claim 1, characterized in that, The drive assembly includes a motor base (151), a mold adjusting motor (161), and a rotation angle detection device (181). The motor base (151) is located on the tail plate (11), and the mold adjusting motor (161) is located on the motor base (151). The motor base (151) has a first hollow cavity and a second adjustment port (1510), the mold adjustment gear (14) is located in the first hollow cavity, and the mold adjustment gear (14) extends out from the second adjustment port (1510); The mold adjustment motor (161) has a drive shaft (17) that extends into the first hollow cavity and is connected to the mold adjustment gear (14). The rotation angle detection device (181) is used to detect the rotation angle of the drive shaft (17).

3. The die-casting machine mold adjustment structure according to claim 2, characterized in that, The rotation angle detection device (181) is connected to the drive shaft (17). Alternatively, the rotation angle detection device (181) is connected to the mold adjustment gear (14). Alternatively, the rotation angle detection device (181) is connected to the adjusting nut (13).

4. The die-casting machine mold adjustment structure according to claim 2, characterized in that, The drive assembly includes a motor mount (152) and a motor (162), the motor mount (152) being mounted on the tail plate (11) and the motor (162) being mounted on the motor mount (152); The motor base (152) has a second hollow cavity and a third adjustment port (1520), the mold adjustment gear (14) is located in the second hollow cavity, and the mold adjustment gear (14) extends out from the third adjustment port (1520); The motor (162) has a drive shaft (17) and a rotation angle detection device (181). The drive shaft (17) extends into the first hollow cavity and is connected to the mold adjustment gear (14). The rotation angle detection device (181) is used to detect the rotation angle of the drive shaft (17).

5. The die-casting machine mold adjustment structure according to claim 4, characterized in that, The motor (162) is a servo motor or a stepper motor.

6. The die-casting machine mold adjustment structure according to any one of claims 1-5, characterized in that, The rotation angle detection device (181) is a rotary encoder.

7. The die-casting machine mold adjustment structure according to any one of claims 1-5, characterized in that, Also includes: A clamping force monitoring device (182) is provided on the guide post (12). The clamping force monitoring device (182) is used to monitor the clamping force of the guide post (12) after clamping.

8. The die-casting machine mold adjustment structure according to any one of claims 1-5, characterized in that, A gap is provided between the adjusting nut (13) located in the accommodating cavity and the large hole section wall of the stepped hole (110).

9. The die-casting machine mold adjustment structure according to any one of claims 1-5, characterized in that, A gap is provided between the guide post (12) and the small hole section wall of the stepped hole (110).

10. A die-casting machine, characterized in that, include: The die-casting machine mold adjustment structure (10) as described in any one of claims 1-9; The head plate (20) is connected to one end of the four guide posts (12) away from the tail plate (11); The middle plate (30) is sleeved on the four guide posts (12). The middle plate (30) is located between the tail plate (11) and the head plate (20). The side surface of the middle plate (30) near the head plate (20) is used to connect the moving mold (100) of the die-casting mold. A crank mechanism (40) is connected between the tail plate (11) and the middle plate (30).

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