Die assembly buffer device for die-casting die frame

Abstract

The invention discloses a die-casting mold frame closing buffer device, and relates to the technical field of mold frame closing, the die-casting mold frame closing buffer device comprises a lower mold frame, the top of the lower mold frame is provided with an upper mold frame, and the lower mold frame is internally provided with a buffer assembly; when the die is used and the upper die frame and the lower die frame are closed, the buffer columns generate downward pressure on the buffer blocks, so that the buffer blocks and the buffer rods move downwards, the buffer blocks gradually extrude the annular air bags, the annular air bags deform and absorb part of impact force, meanwhile, the buffer rods drive the damping blocks to move downwards in the buffer cylinders, and the damping blocks are driven by an external control system. The coil is powered on, under the action of a magnetic field, the viscosity of the magnetorheological fluid is increased, damping force is generated, and therefore the buffering effect is achieved, the buffering effect of the annular air bag and the buffering effect of the magnetorheological fluid are combined, the double buffering effect is formed, the buffering performance is further improved, and under the action of the buffering assembly, the buffering effect in the die-casting die frame die closing process is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of mold frame clamping, in particular to a die-casting mold frame clamping buffer device. Background Art

[0002] The die casting mold frame is a supporting structure for the die in the die casting process, which is mainly composed of a fixed mold and a movable mold. Its main function is to provide support, positioning and closing of the mold, so that the molten metal can be effectively pressed into the mold cavity during the die casting process to form the required casting. The die casting mold frame needs to be buffered when closing the mold, because the buffer can smooth the process of mold closing and prevent the mold from being misaligned due to rapid mold closing, thereby improving the accuracy of the casting. The buffer can reduce the impact load and extend the service life of the mold.

[0003] In the prior art, a spring buffering method is generally adopted during the closing process of the die-casting mold frame. During the multiple closing and opening processes of the die-casting mold frame, the spring will also be compressed and released multiple times, which is prone to elastic fatigue, resulting in a gradual weakening of the buffering effect. As the use time increases, the stiffness of the spring may change, and it is impossible to provide a stable buffering force, resulting in a gradual increase in the impact force on the mold frame during the later closing process, thereby increasing the risk of mold frame damage and reducing the service life of the mold frame.

[0004] Therefore, we propose a die-casting mold frame clamping buffer device to solve the problems raised in the above background technology. Summary of the invention

[0005] The object of the present invention is to provide a die-casting mold frame mold closing buffer device to solve the problem proposed in the above background technology that during the die-casting mold frame mold closing process, the spring is compressed and released multiple times, which is prone to elastic fatigue, resulting in the gradual weakening of the buffering effect and the inability to provide a stable buffering force, thereby causing the impact force on the mold frame in the later mold closing process to gradually increase, increasing the risk of mold frame damage and reducing the service life of the mold frame.

[0006] To achieve the above object, the present invention provides the following technical solutions: a die-casting mold frame mold closing buffer device, comprising a lower mold frame, an upper mold frame is arranged on the top of the lower mold frame, a buffer component is arranged inside the lower mold frame, and a reset component is arranged at the bottom of the upper mold frame, the buffer component is used for buffering when the mold frame is closed, and the reset component is used for resetting the buffer component;

[0007] The buffer assembly includes four protective cylinders, the tops of the four protective cylinders are fixedly connected with annular airbags, the interiors of the four protective cylinders are provided with buffer cylinders, the outer surfaces of the four buffer cylinders are provided with coils, the interiors of the four buffer cylinders are movably embedded with buffer rods, the tops of the four buffer rods are fixedly installed with buffer blocks, the tops of the four buffer blocks are fixedly connected with rubber pads, the bottoms of the four buffer rods are fixedly connected with multiple connecting rods, the outer surfaces of the multiple connecting rods are fixedly installed with damping blocks, and the interiors of the four buffer cylinders are filled with magnetorheological fluid.

[0008] Preferably, mounting blocks are installed at the bottom of the upper mold frame near the four corners by bolts, buffer columns are fixedly installed at the bottom of the four mounting blocks, mounting grooves are opened on the tops of the four buffer columns, mounting holes are opened on the bottom surfaces inside the four mounting grooves, and annular grooves are opened on the inner walls of the four mounting holes.

[0009] Preferably, the reset assembly includes four forward and reverse motors, the output ends of the four forward and reverse motors are fixedly installed with rotating rods, the bottom ends of the four rotating rods are fixedly installed with four-corner blocks, the outer surfaces of the four four-corner blocks are fixedly covered with four-corner protective sleeves, and the outer surfaces of the four rotating rods are fixedly installed with annular blocks near the top.

[0010] Preferably, the outer surfaces of the four rotating rods are movably embedded in the four mounting holes respectively, the outer surfaces of the four annular blocks are movably embedded in the four annular grooves respectively, and the four forward and reverse motors are respectively installed in the four mounting grooves by bolts.

[0011] Preferably, four rubber pads are each provided with four-corner holes on the top, four buffer blocks are each provided with four-corner grooves on the top, and four fan-shaped grooves are each provided on the bottom surface inside the four-corner grooves.

[0012] Preferably, the top of the lower mold frame is provided with embedded grooves near the four corners, the bottom surfaces inside the four embedded grooves are provided with buffer grooves, the tops of the four buffer cylinders are provided with sealing holes, and the inner walls of the four sealing holes are fixedly connected with sealing rings.

[0013] Preferably, the outer surfaces of the four buffer rods are in contact with the inner walls of the four sealing rings respectively, and inclined scraper rings are fixedly installed on the top surfaces of the insides of the four buffer cylinders near the sealing holes. The outer surfaces of the four buffer rods are in contact with the inner walls of the four inclined scraper rings near the bottom surfaces respectively, and movable holes are opened on the tops of the four protective cylinders.

[0014] Preferably, the outer surfaces of the four buffer rods are movably embedded in the four movable holes and the inside of the four annular airbags respectively, the outer surfaces of the four buffer blocks are fixedly mounted with two limit rods, and the inner walls of the four buffer grooves are provided with two limit grooves near the top.

[0015] Preferably, one ends of the plurality of limit rods are movably embedded in the interior of the plurality of limit grooves, the bottoms of the four protective cylinders and the bottoms of the four buffer cylinders are fixedly mounted on the bottom surfaces of the four buffer grooves, and the outer surfaces of the four coils are respectively located inside the four protective cylinders.

[0016] Preferably, a lower mold is arranged inside the lower mold frame, and an upper mold is arranged inside the upper mold frame. Two positioning rods are fixedly installed on the bottom of the upper mold frame near the front surface and the rear surface, and two positioning grooves are provided on the top of the lower mold frame near the front surface and the rear surface. The bottom ends of the four positioning rods are movably embedded in the four positioning grooves.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the present invention is used, when the upper mold frame and the lower mold frame are closed, the buffer column enters the buffer groove and generates downward pressure on the buffer block, so that the buffer block and the buffer rod move downward, and the buffer block gradually squeezes the annular airbag, and the annular airbag is deformed to absorb part of the impact force. At the same time, the buffer rod drives the damping block to move downward in the buffer cylinder. Through the external control system, the coil is energized. Under the action of the magnetic field, the viscosity of the magnetorheological fluid increases, generating a damping force, thereby playing a buffering role. The buffering effect of the annular airbag is combined with the magnetorheological fluid to form a double buffering effect, further improving the buffering performance. Under the action of the buffer component, the buffering effect in the process of closing the die-casting mold frame is greatly improved, and there is no need to use spring buffering.

[0019] 2. When the present invention is used, the four coils are powered off in advance, the magnetorheological fluid becomes a low-viscosity liquid, and the forward and reverse motors are started. The four corner blocks are driven to rotate through the rotating rod, so that the four corners of the four corner blocks are respectively rotated to the four fan-shaped grooves, and then the forward and reverse motors automatically pause for a while. When opening the mold, the upper mold frame moves upward, and the buffer block and the buffer rod are driven to move upward through the mounting block and the four corner blocks. Then the upper mold frame pauses for a while, and the forward and reverse motors resume working. The output end thereof rotates in the opposite direction, driving the four corner blocks to rotate from the fan-shaped groove back to the four corner groove. Then the upper mold frame resumes working, pulling the four corner blocks away from the four corner grooves to reset. Under the action of the reset assembly, the buffer block and the buffer rod in the buffer assembly can move upward to reset, without affecting the buffering effect during the next mold closing.

[0020] 3. When the present invention is used, under the action of the rubber pad, the buffer column and the buffer block are protected, under the action of the four-corner protective sleeves, the four-corner blocks and the buffer blocks are protected, and under the action of the damping block, the contact area between the bottom end of the buffer rod and the magnetorheological fluid is increased, which is beneficial to increase the resistance of the magnetorheological fluid to the buffer rod and assist in improving the buffer effect. The buffer rod moves upward and passes through the inclined scraper ring to scrape off the magnetorheological fluid adhered to the outer surface of the buffer rod, so as to prevent the buffer rod from bringing the magnetorheological fluid adhered to the outer surface to the outside of the buffer cylinder, causing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front perspective view of a die-casting mold frame clamping buffer device of the present invention;

[0022] Figure 2 A bottom perspective view of a die-casting mold frame clamping buffer device of the present invention;

[0023] Figure 3 It is a structural sectional and expanded stereoscopic diagram of a buffer column in a die-casting mold frame clamping buffer device of the present invention;

[0024] Figure 4 It is a structural unfolded stereogram of a reset component in a die-casting mold frame clamping buffer device of the present invention;

[0025] Figure 5 It is a structural sectional and expanded stereoscopic diagram of a lower mold frame in a mold clamping buffer device of a die-casting mold frame of the present invention;

[0026] Figure 6 It is a structural sectional and expanded stereoscopic diagram of a protective tube in a die-casting mold frame clamping buffer device of the present invention;

[0027] Figure 7 It is a structural sectional and expanded stereoscopic diagram of an inclined scraper ring in a die-casting mold frame clamping buffer device of the present invention;

[0028] Figure 8 It is a structural unfolded stereogram of a buffer block in a die-casting mold frame clamping buffer device of the present invention;

[0029] Fig. 9 The present invention provides a cross-sectional and expanded stereoscopic view of the structure of a rubber pad in a die-casting mold frame clamping buffer device.

[0030] In the figure: 1, lower mold frame; 2, lower mold; 3, embedded groove; 4, buffer groove; 5, buffer assembly; 501, protective tube; 502, annular airbag; 503, buffer tube; 504, coil; 505, buffer rod; 506, buffer block; 507, rubber pad; 508, limit rod; 509, inclined scraper ring; 510, sealing hole; 511, sealing ring; 512, movable hole; 513, limit groove; 514, four corner holes ; 515, four-corner groove; 516, fan-shaped groove; 517, connecting rod; 518, damping block; 519, mounting block; 520, buffer column; 521, mounting groove; 522, mounting hole; 523, annular groove; 6, reset assembly; 601, forward and reverse motor; 602, rotating rod; 603, annular block; 604, four-corner block; 605, four-corner protective cover; 7, upper mold frame; 8, upper mold; 9, positioning rod; 10, positioning groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figure 1-Figure 9As shown, the present invention provides a technical solution: a die-casting mold frame mold closing buffer device, comprising a lower mold frame 1, an upper mold frame 7 is arranged on the top of the lower mold frame 1, a buffer component 5 is arranged inside the lower mold frame 1, and a reset component 6 is arranged at the bottom of the upper mold frame 7. The buffer component 5 is used for buffering when the mold frame is closed, and the reset component 6 is used for resetting the buffer component 5; the buffer component 5 includes four protective cylinders 501, the tops of the four protective cylinders 501 are fixedly connected with annular airbags 502, the insides of the four protective cylinders 501 are arranged with buffer cylinders 503, the outer surfaces of the four buffer cylinders 503 are arranged with coils 504, and the insides of the four buffer cylinders 503 are movably embedded with buffers Rod 505, the top of the four buffer rods 505 are fixedly installed with buffer blocks 506, the tops of the four buffer blocks 506 are fixedly connected with rubber pads 507, the bottoms of the four buffer rods 505 are fixedly connected with multiple connecting rods 517, the outer surfaces of the multiple connecting rods 517 are fixedly installed with damping blocks 518, the interiors of the four buffer cylinders 503 are filled with magnetorheological fluid, the top of the lower mold frame 1 is provided with embedded grooves 3 near the four corners, the bottom surfaces of the four embedded grooves 3 are provided with buffer grooves 4, the tops of the four buffer cylinders 503 are provided with sealing holes 510, the inner walls of the four sealing holes 510 are fixedly connected with sealing rings 511, and the four buffer The outer surface of the rod 505 is in contact with the inner wall of the four sealing rings 511 respectively, and the top surface of the inside of the four buffer cylinders 503 is fixedly installed with an inclined scraper ring 509 near the sealing hole 510. The outer surfaces of the four buffer rods 505 are in contact with the inner walls of the four inclined scraper rings 509 near the bottom surface respectively. The top of the four protective cylinders 501 is provided with a movable hole 512. The outer surfaces of the four buffer rods 505 are movably embedded in the four movable holes 512 and the inside of the four annular airbags 502 respectively. The outer surfaces of the four buffer blocks 506 are fixedly installed with two limit rods 508, and the inner walls of the four buffer grooves 4 are provided with two limit grooves 513 near the top. One ends of multiple limit rods 508 are movably embedded in the interior of multiple limit grooves 513, the bottoms of four protective tubes 501 and the bottoms of four buffer tubes 503 are fixedly installed on the bottom surfaces of four buffer grooves 4, the outer surfaces of four coils 504 are respectively located in the interiors of four protective tubes 501, the lower mold 2 is arranged in the interior of the lower mold frame 1, the upper mold 8 is arranged in the interior of the upper mold frame 7, two positioning rods 9 are fixedly installed on the bottom of the upper mold frame 7 near the front surface and the rear surface, two positioning grooves 10 are provided on the top of the lower mold frame 1 near the front surface and the rear surface, and the bottom ends of the four positioning rods 9 are movably embedded in the interiors of the four positioning grooves 10.

[0033] In this embodiment, when in use, when the upper mold frame 7 moves downward to close the mold with the lower mold frame 1, it will drive the four positioning rods 9 to slide in the corresponding positioning grooves 10. Through the cooperation of the positioning rods 9 and the positioning grooves 10, the upper mold frame 7 and the lower mold frame 1 are positioned to improve the accuracy of closing the mold. As the upper mold frame 7 moves downward, the four buffer columns 520 gradually pass through the embedded grooves 3 at the corresponding positions and enter the buffer groove 4, and make the four corner blocks 604 and the four corner protective sleeves 605 in the reset component 6 pass through the four corner holes 514 and enter the four corner grooves 515. At the same time, the bottom of the buffer column 520 will contact the rubber pad 507 and generate downward pressure on the buffer block 506, so that the buffer block 506 moves downward and drives the two limit rods 508 on the outer surface to move in the corresponding The buffer block 506 slides in the limiting groove 513, and the limiting rod 508 cooperates with the limiting groove 513 to limit the buffer block 506 to prevent it from rotating, causing the four-corner groove 515 to rotate and stagger the position of the four-corner block 604, affecting the normal operation of the reset component 6. As the buffer block 506 moves downward in the buffer groove 4, it will gradually squeeze the annular airbag 502. The annular airbag 502 itself has a certain elasticity and can provide a first buffer. The annular airbag 502 will deform after being subjected to pressure to absorb part of the impact force. At the same time, the movement of the buffer block 506 will drive the buffer rod 505 to move downward in the movable hole 512, the sealing ring 511 and the inclined scraper ring 509, further driving multiple connecting rods 517 and multiple damping blocks 518 in the buffer cylinder 50 3 moves downward, and the coil 504 is energized through the external control system. When the coil 504 is energized, a magnetic field is generated. The interior of the buffer cylinder 503 is filled with magnetorheological fluid, and the liquid level of the magnetorheological fluid is flush with the bottom of the damping block 518. When there is no magnetic field, the magnetorheological fluid exhibits low-viscosity liquid characteristics. When the coil 504 is energized and there is a magnetic field, the magnetic particles therein will quickly arrange along the direction of the magnetic field to form a chain structure, so that the viscosity of the magnetorheological fluid increases and a damping force is generated. When the buffer rod 505 moves downward, the high viscosity state of the magnetorheological fluid will hinder the moving speed of the buffer rod 505. Through this resistance effect, the impact force of the mold closing is converted into the internal energy of the magnetorheological fluid, thereby playing a buffering role. The annular airbag 502 is in harmony with the buffering effect of the magnetorheological fluid. Combined, a double buffering effect is formed to further improve the buffering performance. The bottom of the damping block 518 is relatively flat. Under the action of multiple damping blocks 518, the contact area between the bottom end of the buffer rod 505 and the magnetorheological fluid is increased, thereby increasing the resistance of the magnetorheological fluid to the buffer rod 505, and assisting in improving the buffering effect. Under the action of the buffer component 5, the buffering effect of the die-casting mold frame during the mold closing process is greatly improved, and there is no need to use spring buffering. This solves the problem that during the mold closing process of the die-casting mold frame, the spring is compressed and released many times, and elastic fatigue is prone to occur, resulting in the gradual weakening of the buffering effect and the inability to provide a stable buffering force, which causes the mold frame to be subjected to a gradual increase in impact force during the later mold closing process, increasing the risk of mold frame damage and reducing the service life of the mold frame.

[0034] Embodiment 2: Figure 1 and Figure 3-Figure 9 As shown, the buffer assembly 5 includes four protective cylinders 501, the tops of the four protective cylinders 501 are fixedly connected with annular airbags 502, the interiors of the four protective cylinders 501 are provided with buffer cylinders 503, the outer surfaces of the four buffer cylinders 503 are provided with coils 504, the interiors of the four buffer cylinders 503 are movably embedded with buffer rods 505, the tops of the four buffer rods 505 are fixedly installed with buffer blocks 506, the tops of the four buffer blocks 506 are fixedly connected with rubber pads 507, the bottoms of the upper mold frame 7 are all installed with mounting blocks 519 by bolts near the four corners, the bottoms of the four mounting blocks 519 are fixedly installed with buffer columns 520, the tops of the four buffer columns 520 are provided with mounting grooves 521, the bottom surfaces of the four mounting grooves 521 are provided with mounting holes 522, and the inner walls of the four mounting holes 522 are provided with annular grooves 523, and the reset assembly 6 includes four forward and reverse motors 601, four forward and reverse motors The output end of 601 is fixedly installed with a rotating rod 602, the bottom ends of the four rotating rods 602 are fixedly installed with four corner blocks 604, the outer surfaces of the four corner blocks 604 are fixedly sleeved with four corner protective sleeves 605, the outer surfaces of the four rotating rods 602 are fixedly installed with annular blocks 603 near the top, the outer surfaces of the four rotating rods 602 are movably embedded in the four mounting holes 522, the outer surfaces of the four annular blocks 603 are movably embedded in the four annular grooves 523, the four forward and reverse motors 601 are respectively installed in the four mounting grooves 521 by bolts, the tops of the four rubber pads 507 are provided with four corner holes 514, the tops of the four buffer blocks 506 are provided with four corner grooves 515, the bottom surfaces of the four corner grooves 515 are provided with four fan-shaped grooves 516, the top of the lower mold frame 1 is provided with embedded grooves 3 near the four corners, and the bottom surfaces of the four embedded grooves 3 are provided with buffer grooves 4.

[0035] In this embodiment, when in use, when the upper mold frame 7 and the lower mold frame 1 are molded, the mounting block 519 will enter the embedded groove 3 at the corresponding position, which will not affect the tightness of the upper mold frame 7 and the lower mold frame 1 when they are molded. During the mold closing process, the four corner blocks 604 just pass through the four corner holes 514 and enter the four corner grooves 515. When it is necessary to open the mold, the four coils 504 are powered off in advance, and the four forward and reverse motors 601 are started. After the coils 504 are powered off, the magnetic field disappears, and the magnetorheological fluid becomes a low-viscosity liquid. At the same time, after the forward and reverse motors 601 are started, the rotation of the output end of the forward and reverse motors 601 drives the rotating rod 602 to rotate, further driving The movable four-corner block 604 rotates in the four-corner groove 515, so that the four corners of the four-corner block 604 rotate to the four fan-shaped grooves 516 respectively, and then the forward and reverse motor 601 automatically pauses for a while. When the mold is opened, the upper mold frame 7 moves upward, driving the mounting block 519 and the buffer column 520 to gradually leave the embedded groove 3 and the buffer groove 4, and driving the forward and reverse motor 601 and the rotating rod 602 to move upward, further driving the four-corner block 604 to move upward, thereby driving the buffer block 506 and the buffer rod 505 to move upward. When the limit rod 508 moves upward and contacts the top surface inside the limit groove 513, the damping block 518 just moves When the upper mold frame 7 reaches the liquid surface of the magnetorheological fluid, the upper mold frame 7 will pause for a while, and the forward and reverse motor 601 will resume working, and its output end will rotate in the opposite direction, driving the four-corner block 604 to rotate from the fan-shaped groove 516 back to the four-corner groove 515, and the buffer block 506 and the four-corner block 604 lose the limit. Then the upper mold frame 7 resumes working and continues to drive the buffer column 520 to move upward, so that the four-corner block 604 leaves the four-corner groove 515 and resets. Under the action of the reset component 6, the buffer block 506 and the buffer rod 505 in the buffer component 5 can move upward and reset, which does not affect the buffering effect during the next mold closing. 07, the buffer column 520 and the buffer block 506 are protected, the wear caused by collision between the buffer column 520 and the buffer block 506 is reduced, and the service life is improved. Under the action of the four-corner protective sleeve 605, the four-corner block 604 and the buffer block 506 are protected, and the wear caused by friction between the four-corner block 604 and the buffer block 506 is reduced. The buffer rod 505 moves upward and passes through the inclined scraper ring 509, which can scrape off the magnetorheological fluid adhered to the outer surface of the buffer rod 505, so as to avoid the buffer rod 505 bringing the magnetorheological fluid adhered to the outer surface to the outside of the buffer tube 503, causing waste.

[0036] The effect and working principle achieved by the entire mechanism are as follows: when in use, when the upper mold frame 7 moves downward to close the mold with the lower mold frame 1, the four buffer columns 520 gradually pass through the embedded grooves 3 at the corresponding positions and enter the inside of the buffer grooves 4, and make the four-corner blocks 604 and the four-corner protective sleeves 605 in the reset assembly 6 pass through the four-corner holes 514 and enter the four-corner grooves 515. At the same time, the bottom of the buffer column 520 will contact the rubber pad 507 and generate downward pressure on the buffer block 506, so that the buffer block 506 moves downward and gradually squeezes the annular airbag 502. The annular airbag 502 itself has a certain elasticity and can provide the first buffer. The annular airbag 502 will deform after being subjected to pressure to absorb part of the impact force. At the same time, the movement of the buffer block 506 will drive the buffer The punch rod 505 moves downward in the movable hole 512, the sealing ring 511 and the inclined scraper ring 509, further driving the multiple connecting rods 517 and the multiple damping blocks 518 to move downward in the buffer cylinder 503. The coil 504 is energized through the external control system. After the coil 504 is energized, a magnetic field will be generated. The buffer cylinder 503 is filled with magnetorheological fluid. When the magnetic field is applied, the magnetic particles therein will quickly arrange along the direction of the magnetic field to form a chain structure, so that the viscosity of the magnetorheological fluid increases, generating a damping force. When the buffer rod 505 moves downward, the high viscosity state of the magnetorheological fluid will hinder the moving speed of the buffer rod 505. Through this resistance effect, the impact force of the mold is converted into the internal energy of the magnetorheological fluid, thereby playing a buffering role. The annular airbag 502 and the magnetorheological fluid The buffering effect is combined to form a double buffering effect, further improving the buffering performance. The bottom of the damping block 518 is relatively flat. Under the action of multiple damping blocks 518, the contact area between the bottom end of the buffer rod 505 and the magnetorheological fluid is increased, thereby increasing the resistance of the magnetorheological fluid to the buffer rod 505, and assisting in improving the buffering effect. Under the action of the buffer component 5, the buffering effect of the die-casting mold frame during the mold closing process is greatly improved, and there is no need to use spring buffering. When the mold needs to be opened, the four coils 504 are powered off in advance, and the four forward and reverse motors 601 are started. After the coils 504 are powered off, the magnetic field disappears, and the magnetorheological fluid becomes a low-viscosity liquid. At the same time, after the forward and reverse motors 601 are started, the rotation of the output end of the forward and reverse motors 601 drives the rotating rod 602 to rotate, and the mold is opened. In one step, the four corner blocks 604 are driven to rotate in the four corner grooves 515, so that the four corners of the four corner blocks 604 are respectively rotated to the four fan-shaped grooves 516, and then the forward and reverse motors 601 automatically pause for a while. When the mold is opened, the upper mold frame 7 moves upward, driving the mounting block 519 and the buffer column 520 to gradually leave the embedded groove 3 and the buffer groove 4, and driving the forward and reverse motors 601 and the rotating rod 602 to move upward, further driving the four corner blocks 604 to move upward, thereby driving the buffer block 506 and the buffer rod 505 to move upward. When the limit rod 508 moves upward and contacts the top surface inside the limit groove 513, the damping block 518 just moves to the liquid surface of the magnetorheological fluid, and at this time the upper mold frame 7 will pause for a while, the forward and reverse motors 601 resume working, and its output end will rotate in the opposite direction.The four-corner block 604 is driven to rotate from the fan-shaped groove 516 back to the four-corner groove 515, and the buffer block 506 loses the limit between the four-corner block 604. Then the upper mold frame 7 resumes work and continues to drive the buffer column 520 to move upward, so that the four-corner block 604 leaves the four-corner groove 515 and resets. Under the action of the reset component 6, the buffer block 506 and the buffer rod 505 in the buffer component 5 can move upward and reset, which does not affect the buffering effect during the next mold closing. Under the action of the rubber pad 507, the buffer column 520 and the buffer block 506 are The buffer rod 505 is protected to reduce the wear caused by collision between the buffer column 520 and the buffer block 506, thereby increasing the service life. Under the action of the four-corner protective sleeve 605, the four-corner block 604 and the buffer block 506 are protected to reduce the wear caused by friction between the four-corner block 604 and the buffer block 506. The buffer rod 505 moves upward through the inclined scraper ring 509, which can scrape off the magnetorheological fluid adhered to the outer surface of the buffer rod 505, thereby preventing the buffer rod 505 from bringing the magnetorheological fluid adhered to the outer surface to the outside of the buffer cylinder 503, causing waste.

[0037] Among them, the coil 504 and the forward and reverse motor 601 are both existing technologies, and their components and operating principles are all public technologies, so no further explanation will be given here.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A die-casting mold frame clamping buffer device, comprising a lower mold frame (1), an upper mold frame (7) being arranged on the top of the lower mold frame (1), characterized in that: A buffer component (5) is arranged inside the lower mold frame (1), and a reset component (6) is arranged at the bottom of the upper mold frame (7). The buffer component (5) is used for buffering when the mold frames are closed, and the reset component (6) is used for resetting the buffer component (5); The buffer assembly (5) comprises four protective cylinders (501), the tops of the four protective cylinders (501) are fixedly connected with an annular airbag (502), the interiors of the four protective cylinders (501) are provided with buffer cylinders (503), the outer surfaces of the four buffer cylinders (503) are provided with coils (504), the interiors of the four buffer cylinders (503) are movably embedded with buffer rods (505), the tops of the four buffer rods (505) are fixedly installed with buffer blocks (506), the tops of the four buffer blocks (506) are fixedly connected with rubber pads (507), the bottoms of the four buffer rods (505) are fixedly connected with a plurality of connecting rods (517), the outer surfaces of the plurality of connecting rods (517) are fixedly installed with damping blocks (518), and the interiors of the four buffer cylinders (503) are filled with magnetorheological fluid.

2. The die-casting mold frame clamping buffer device according to claim 1, characterized in that: The bottom of the upper mold frame (7) is equipped with mounting blocks (519) by bolts near the four corners, and the bottoms of the four mounting blocks (519) are fixedly equipped with buffer columns (520), the tops of the four buffer columns (520) are provided with mounting grooves (521), the bottom surfaces of the four mounting grooves (521) are provided with mounting holes (522), and the inner walls of the four mounting holes (522) are provided with annular grooves (523).

3. The die-casting mold frame clamping buffer device according to claim 2, characterized in that: The reset assembly (6) comprises four forward and reverse motors (601), the output ends of the four forward and reverse motors (601) are fixedly mounted with rotating rods (602), the bottom ends of the four rotating rods (602) are fixedly mounted with four-corner blocks (604), the outer surfaces of the four four-corner blocks (604) are fixedly sleeved with four-corner protective sleeves (605), and the outer surfaces of the four rotating rods (602) are fixedly mounted with annular blocks (603) near the top ends.

4. The die-casting mold frame clamping buffer device according to claim 3, characterized in that: The outer surfaces of the four rotating rods (602) are movably embedded in the four mounting holes (522), the outer surfaces of the four annular blocks (603) are movably embedded in the four annular grooves (523), and the four forward and reverse motors (601) are respectively installed in the four mounting grooves (521) by bolts.

5. The die-casting mold frame clamping buffer device according to claim 4, characterized in that: The tops of the four rubber pads (507) are each provided with a four-corner hole (514), the tops of the four buffer blocks (506) are each provided with a four-corner groove (515), and the bottom surfaces of the four four-corner grooves (515) are each provided with four fan-shaped grooves (516).

6. The die-casting mold frame clamping buffer device according to claim 1, characterized in that: The top of the lower mold frame (1) is provided with embedded grooves (3) near the four corners, the bottom surfaces of the four embedded grooves (3) are provided with buffer grooves (4), the tops of the four buffer cylinders (503) are provided with sealing holes (510), and the inner walls of the four sealing holes (510) are fixedly connected with sealing rings (511).

7. The die-casting mold frame clamping buffer device according to claim 6, characterized in that: The outer surfaces of the four buffer rods (505) are in contact with the inner walls of the four sealing rings (511) respectively, and inclined scraper rings (509) are fixedly installed on the top surfaces of the insides of the four buffer cylinders (503) near the sealing holes (510). The outer surfaces of the four buffer rods (505) are in contact with the inner walls of the four inclined scraper rings (509) near the bottom surfaces respectively, and movable holes (512) are opened on the tops of the four protective cylinders (501).

8. The die-casting mold frame clamping buffer device according to claim 7, characterized in that: The outer surfaces of the four buffer rods (505) are movably embedded in the four movable holes (512) and the inside of the four annular air bags (502), respectively; the outer surfaces of the four buffer blocks (506) are fixedly mounted with two limit rods (508); and the inner walls of the four buffer grooves (4) are provided with two limit grooves (513) near the top.

9. The die-casting mold frame clamping buffer device according to claim 8, characterized in that: One ends of the plurality of limit rods (508) are movably embedded in the interior of the plurality of limit grooves (513), the bottoms of the four protective cylinders (501) and the bottoms of the four buffer cylinders (503) are fixedly mounted on the bottom surfaces of the four buffer grooves (4), and the outer surfaces of the four coils (504) are located inside the four protective cylinders (501), respectively.

10. The die-casting mold frame clamping buffer device according to claim 1, characterized in that: A lower mold (2) is disposed inside the lower mold frame (1), and an upper mold (8) is disposed inside the upper mold frame (7). Two positioning rods (9) are fixedly mounted on the bottom of the upper mold frame (7) near the front surface and the rear surface. Two positioning grooves (10) are provided on the top of the lower mold frame (1) near the front surface and the rear surface. The bottom ends of the four positioning rods (9) are movably embedded in the four positioning grooves (10).

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