High-pressure die casting machine with buffering and damping functions for metal parts

Abstract

The present application relates to die casting technical field, especially to a kind of metal piece high-pressure die casting machine with buffering and shock-absorbing function, comprising: die casting base, mold clamping driving device, movable die being arranged at the end of mold clamping driving device, injection integrated device and fixed die being fixed at the end of injection integrated device, four connecting buffer pieces are arranged between fixed die and movable die, and four connecting buffer pieces are used to limit the sliding position of movable die;The input groove is arranged below the fixed die, the output end of the injection integrated device is communicated with the input groove, and the buffer assembly for reducing the speed of metal melt is arranged inside the input groove;The buffer assembly includes a plurality of vane pieces, mounting block, adjusting piece and metal damping buffer pipe piece, and the metal damping buffer pipe piece is fixedly installed inside the input groove.The present application is provided with composite buffer structure, absorbs melt fluid impact, reduces mould core vibration, slows down the speed of mould fatigue crack and erosion, and prolongs the service life of precision die casting mould.

Description

Technical Field

[0001] This invention relates to the field of die casting technology, and in particular to a high-pressure die casting machine for metal parts with buffering and shock absorption functions. Background Technology

[0002] High-pressure die casting is currently the core forming process for the mass production of lightweight metal components. Relying on the principle of high pressure and high speed injection, molten metal is injected into a closed mold cavity, and after holding pressure, cooling and solidification, it is demolded and formed. It has the advantages of high forming efficiency, high component dimensional accuracy, good surface finish, and the ability to form complex cavity structures in one piece.

[0003] Patent CN119237708A discloses a die-casting machine for a miniature inverter housing, including a base, a housing mounted on the base, a mold-closing assembly mounted on the base, a mold assembly mounted on the mold-closing assembly, and a die-casting mechanism located on the right side of the mold-closing assembly. The mold assembly includes a fixed mold base and a moving mold base, both of which have cavities for die-casting the inverter housing. This die-casting machine, through the use of three interconnected damping structures during the mold-closing process, achieves multi-stage buffering of the impact force during mold closing, effectively preventing the expansion force generated by the molten metal during high-pressure injection from increasing the mold gap, thereby improving the locking stability of the mold and the die-casting precision of the parts.

[0004] However, existing die-casting machines generate severe impacts when molten metal enters the cavity at high speed. The impact vibration of the cavity fluid has no damping structure. The high-speed impact of the molten metal on the inner wall of the cavity causes the mold to vibrate at high frequency, which accelerates the fatigue and erosion of the mold cavity, significantly shortens the service life of precision die-casting molds, and also causes the frame to vibrate, amplifying the vibration and noise of the whole machine. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a high-pressure die-casting machine for metal parts with buffering and shock absorption functions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A high-pressure die-casting machine for metal parts with buffering and shock absorption function includes: a die-casting base, a mold closing drive device, a moving mold disposed at the end of the mold closing drive device, an injection integration device, and a fixed mold fixed at the end of the injection integration device. Four connecting buffers are disposed between the fixed mold and the moving mold, and the four connecting buffers are used to limit the sliding position of the moving mold. An inlet groove is provided below the fixed mold, and the output end of the injection integrated device is connected to the inlet groove. A buffer component for slowing down the molten metal is provided inside the inlet groove. The buffer assembly includes multiple blades, a mounting block, an adjusting component, and a metal damping buffer tube. The metal damping buffer tube is fixedly installed inside the inlet groove, and its end facing the injection integration device is rotatably connected to the mounting block. The multiple blades are rotatably installed on the mounting block, and the multiple blades form a buffer ring. The adjusting component is located between the blades and the metal damping buffer tube and is used to adjust the deflection angle of the blades and change the diameter of the buffer ring.

[0007] Preferably, the connecting buffer includes a connecting groove, a connecting column, a hydraulic pipe, a spring tube, a working piston rod, and a floating piston. The connecting groove is formed on the moving mold, and the fixed mold has an installation groove, which is symmetrically arranged with the connecting groove. The hydraulic pipe is fixedly installed inside the installation groove. The working piston rod is slidably and sealed at the end of the hydraulic pipe. The spring tube is fixedly arranged between the connecting column and the hydraulic pipe and is sleeved on the working piston rod. The floating piston is slidably arranged inside the hydraulic pipe.

[0008] Preferably, the blade assembly includes a rotating blade, a connecting rod, and a rotating sleeve. The rotating blade is a right-angled triangle with its right-angled side close to the mounting block. Multiple rotating blades form a buffer ring with a frustum-shaped buffer space in the middle. The connecting rod is fixedly connected to the bottom side of the rotating blade, and the rotating sleeve is fitted onto the connecting rod and rotatably disposed inside the mounting block.

[0009] Preferably, the adjusting component includes an outer ring, an inner ring, multiple adjusting grooves, and multiple adjusting rods. The outer ring is fixedly connected to the side of the metal damping buffer tube near the blade component, and the mounting block is slidably disposed inside the outer ring. The metal damping buffer tube has a rotating groove at its end, and the inner ring is rotatably disposed inside the rotating groove. Multiple adjusting grooves are annularly opened on the inner side of the inner ring, and multiple adjusting rods are vertically fixedly connected to the end of the connecting rod.

[0010] Preferably, the adjusting groove is an arc-shaped groove, the adjusting rod is slidably disposed inside the adjusting groove, and the adjusting rod is used to drive the connecting rod to rotate, thereby changing the deflection angle of the rotating blade.

[0011] Preferably, the inner ring has multiple limiting holes on the side near the mounting block, and the mounting block has multiple limiting rods fixedly connected in a ring shape and slidably disposed inside the limiting holes.

[0012] Preferably, the metal damping buffer fitting includes a housing, a piston rod, a metal bellows, and an inflation valve. The housing is fixedly installed inside the inlet groove. The piston rod is slidably and sealed inside the housing, with one end extending out of the housing and rotatably connected to the mounting block. The metal bellows is located on the inner wall of the end of the housing away from the piston rod. The inflation valve is fixedly connected to the end of the housing and communicates with the metal bellows.

[0013] Preferably, locking components are symmetrically arranged on both sides of the housing, and the locking components are used to lock the position of the piston rod inside the housing.

[0014] Preferably, the locking assembly includes an outer tube, a locking rod, and a spacer ring. The outer tube is fixedly connected to the side of the housing, and the spacer ring is fixedly connected inside the outer tube, dividing the outer tube into an adjustment space and an active space. One end of the locking rod is slidably and sealed inside the adjustment space, and the other end is slidably and sealed inside the active space.

[0015] Preferably, a fluid guiding assembly is provided between the outer tube and the hydraulic tube. The fluid guiding assembly includes a connecting ring and two fluid guiding tubes. The connecting ring is fixedly connected to the outside of the outer tube and communicates with the adjustment space. One end of each of the two fluid guiding tubes is connected to the connecting ring, and the other end is connected to the two hydraulic tubes respectively.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The inlet groove is equipped with a composite buffer structure to absorb the impact of the molten fluid, reduce the vibration of the mold core, slow down the rate of mold fatigue cracking and corrosion, and extend the service life of precision die casting mold. 2. The blades automatically deflect using the impact force of the melt itself, eliminating the need for motors and electronic control mechanisms. The flow orifice diameter of the buffer ring adapts linearly to the injection speed and melt pressure. High-speed thick-walled die casting automatically reduces the orifice diameter for throttling and deceleration, while low-speed thin-walled die casting automatically opens to ensure mold filling. It can be adapted to castings of various materials and specifications without the need for manual replacement of the throttling baffle. 3. After the pressure is released during die casting, the metal bellows automatically rebounds, and the blades open and move forward synchronously. The blades rotate on their inclined sides to scrape away the residue in the guide groove. Each die casting cycle automatically completes the flow channel cleaning, which solves the problems of residue blockage and frequent machine stoppages for disassembly and cleaning caused by traditional fixed buffer blocks, and improves the production speed of mass production. 4. The hydraulic oil synchronous drive locking component of the connecting buffer component is adopted, eliminating the need for additional hydraulic pumps and independent control valves, thus reducing the layout of pipelines and electrical control components; the mechanical adaptive blade adjustment has no electronic sensors and drive motors, making it less prone to failure in high-temperature die-casting environments, reducing maintenance costs; by designing the metal damping buffer pipe and blade components separately and modularly, a single damaged part can be replaced individually, making maintenance convenient. Attached Figure Description

[0017] Figure 1 This is a front structural diagram of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions proposed in this invention. Figure 2 This is a schematic diagram of the moving mold structure of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions, as proposed in this invention. Figure 3This is a schematic diagram of the fixed mold structure of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions proposed in this invention; Figure 4 This is a schematic diagram of the connecting buffer structure of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions, as proposed in this invention. Figure 5 This is a schematic cross-sectional view of the fixed mold structure of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions proposed in this invention. Figure 6 This is a schematic diagram of the buffer assembly structure of a high-pressure die-casting machine for metal parts with buffering and shock absorption function, as proposed in this invention. Figure 7 This is a schematic diagram of the blade structure of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions, as proposed in this invention. Figure 8 This is a schematic diagram of the back structure of the adjusting component of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions, as proposed in this invention. Figure 9 This is a cross-sectional schematic diagram of a buffer assembly for a high-pressure die-casting machine for metal parts with buffering and shock absorption functions, as proposed in this invention. Figure 10 This is a schematic diagram of the liquid guiding component of a high-pressure die-casting machine for metal parts with buffering and shock absorption functions, as proposed in this invention.

[0018] In the diagram: 1. Die-casting base; 2. Fixed mold; 3. Connecting buffer component; 31. Connecting groove; 32. Connecting column; 33. Hydraulic pipe; 34. Spring tube; 35. Working piston rod; 36. Floating piston; 4. Buffer assembly; 41. Blade component; 411. Rotating blade; 412. Connecting rod; 413. Rotating sleeve; 42. Mounting block; 43. Adjusting component; 431. Outer ring; 432. Inner ring; 433. Adjusting groove; 434. Adjusting rod; 44. Metal damping buffer pipe component; 441. Housing; 442. Piston rod; 443. Metal bellows; 444. Inflation valve; 5. Limiting rod; 6. Locking assembly; 61. Outer tube; 62. Locking rod; 63. Spacer ring; 7. Liquid guiding assembly; 71. Connecting ring; 72. Liquid guiding pipe; 8. Mold closing drive device; 9. Moving mold; 10. Injection integrated device. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0021] Reference Figures 1-10 A high-pressure die-casting machine for metal parts with buffering and shock absorption function includes: a die-casting base 1, a mold closing drive device 8, a moving mold 9 disposed at the end of the mold closing drive device 8, an injection integration device 10, and a fixed mold 2 fixed at the end of the injection integration device 10. Four connecting buffers 3 are provided between the fixed mold 2 and the moving mold 9. The four connecting buffers 3 are used to limit the sliding position of the moving mold 9. An inlet groove is provided below the fixed mold 2, and the output end of the injection integrated device 10 is connected to the inlet groove. A buffer component 4 for slowing down the molten metal is provided inside the inlet groove. The buffer assembly 4 includes multiple blades 41, a mounting block 42, an adjusting member 43, and a metal damping buffer tube 44. The metal damping buffer tube 44 is fixedly installed inside the inlet groove, and its end facing the injection integration device 10 is rotatably connected to the mounting block 42. The multiple blades 41 are rotatably installed on the mounting block 42, and the multiple blades 41 form a buffer ring. The adjusting member 43 is disposed between the blades 41 and the metal damping buffer tube 44, and is used to adjust the deflection angle of the blades 41 and change the diameter of the buffer ring.

[0022] In embodiments applying the above technical solutions, the traditional flow channel buffer structure is a fixed rigid block that relies solely on the deformation of the metal structure to absorb the impact. The buffer stroke is short and the buffer force is not adjustable. The axial impact of the high-pressure melt is directly transmitted to the mold cavity, and long-term alternating impact causes the mold core to crack. The impact of the melt generates both axial and radial forces. The metal damping buffer tube 44 absorbs the axial impact kinetic energy, while the blade 41 and the adjusting component 43 adaptively change the flow area based on the radial impact force, forming a composite buffer system of axial energy absorption and radial throttling. During high-speed mold filling, the blades automatically reduce the orifice diameter for throttling and deceleration, and the metal bellows 443 compresses and buffers synchronously. During low-speed mold filling, the blades automatically open to ensure melt flow, and the metal bellows 443 maintains a small-amplitude floating vibration reduction. After die casting is completed, the metal bellows 443 rebounds, causing the blades to move forward and open. During the self-cleaning process, the blade 41 scrapes off the residue on the inner wall of the guide groove with its beveled edge. The adaptive buffering function is linked with the flow channel self-cleaning function.

[0023] The preferred technical solution in this embodiment is: Reference Figure 4The connecting buffer 3 includes a connecting groove 31, a connecting column 32, a hydraulic pipe 33, a spring tube 34, a working piston rod 35, and a floating piston 36. The connecting groove 31 is formed on the moving mold 9, and the fixed mold 2 is provided with an installation groove, which is symmetrically arranged with the connecting groove 31. The hydraulic pipe 33 is fixedly installed inside the installation groove. The working piston rod 35 is slidably disposed at the end of the hydraulic pipe 33. The spring tube 34 is fixedly disposed between the connecting column 32 and the hydraulic pipe 33 and is sleeved on the working piston rod 35. The floating piston 36 is slidably disposed inside the hydraulic pipe 33. At the moment of mold closing, the moving mold 9 and the fixed mold 2 collide rigidly, and the impact vibration is transmitted along the mold to the whole machine. However, the single spring buffer has only one damping, which is insufficient for high-speed mold closing and excessive for low-speed mold closing. Four sets of symmetrically arranged connecting buffers 3 form four-point synchronous buffer limits. The spring tube 34 provides elastic primary buffering. The damping oil inside the hydraulic tube 33 is throttled by the floating piston 36 to form secondary hydraulic damping buffering. The superposition of the two-stage buffering reduces the peak impact force of the mold closing impact. The floating piston 36 separates the two hydraulic chambers, and throttling damping can be generated in both mold opening and mold closing, resulting in bidirectional shock reduction without rebound impact.

[0024] Reference Figure 6 and Figure 7 The blade component 41 includes a rotating blade 411, a connecting rod 412, and a rotating sleeve 413. The rotating blade 411 is a right-angled triangle with its right-angled side close to the mounting block 42. Multiple rotating blades 411 form a buffer ring with a frustum-shaped buffer space in the middle. The connecting rod 412 is fixedly connected to the bottom side of the rotating blade 411. The rotating sleeve 413 is sleeved on the connecting rod 412 and is rotatably disposed inside the mounting block 42. The existing fixed throttling buffer block has a constant flow orifice diameter, which cannot be adapted to the production of castings of various specifications: small thin-walled parts for die casting require low-pressure and low-speed mold filling, and the fixed small-diameter baffle will cause insufficient molten material filling; when large thick-walled parts for die casting are filled at high pressure and high speed, the fixed large-diameter baffle has insufficient buffering effect and the fluid impact is severe. Multiple sets of right-angled triangular rotating blades 411 deflect synchronously, and the flow passage diameter of the buffer ring can be continuously and adaptively adjusted. The greater the impact force of the melt, the greater the deflection angle of the blades, the linear increase of throttling damping, and the automatic reduction of melt flow velocity. The right-angled triangular structure has uniform force on the hypotenuse, and the multi-blade ring arrangement ensures uniform throttling of the melt in the circumference and avoids melt flow deviation.

[0025] The blade component 41 has a rotating blade thickness of 3-6mm, a right-angled edge length of 15mm, and a ring array of 6-8 blades, so that the buffer ring flow adjustment range is between 10mm-40mm. The blade 41 adopts a right-angled triangular structure, which is forced to unfold vertically under cleaning conditions. In the vertical state, the hypotenuse is parallel and fits against the inner wall of the cavity, resulting in a large contact area and uniform scraping force. The hard metal blade can scrape off a thin layer of solidified metal with strong adhesion. An inclined slag discharge channel is provided at the bottom of the inlet tank, and an electrically controlled slag discharge bin is provided at the end of the slag discharge channel. The slag discharge bin has a built-in slag collection box. A ring-shaped metal filter slag-blocking screen is provided at the front end of the buffer component and the output end of the injection integrated device. The slag-blocking screen has a hole diameter smaller than the allowable slag inclusion size of the casting, which prevents large pieces of metal residue from rushing into the cavity with the melt. When cleaning the residue inside the cavity, dry hot air can be introduced into the cavity through an external hot air and high-pressure airflow matching device. While driving the blades to rotate, it drives the residue to be discharged. Mechanical hard scraping can peel off the thin layer of solidified metal that cannot be removed by airflow. Continuous die casting has no flow channel blockage and no manual disassembly and cleaning process.

[0026] Reference Figures 7-9 The adjusting component 43 includes an outer ring 431, an inner ring 432, multiple adjusting grooves 433, and multiple adjusting rods 434. The outer ring 431 is fixedly connected to the side of the metal damping buffer tube 44 near the blade component 41, and the mounting block 42 is slidably disposed inside the outer ring 431. The metal damping buffer tube 44 has a rotating groove at its end, and the inner ring 432 is rotatably disposed inside the rotating groove. Multiple adjusting grooves 433 are annularly opened inside the inner ring 432, and multiple adjusting rods 434 are vertically fixedly connected to the end of the connecting rod 412. The adjusting groove 433 is an arc-shaped groove, and the adjusting rod 434 is slidably disposed inside the adjusting groove 433. The adjusting rod 434 is used to drive the connecting rod 412 to rotate and change the deflection angle of the rotating blade 411. All the movement fit gaps of the adjusting groove 433, the rotating sleeve 413, and the limiting rod 5 are filled with a high-temperature solid lubricating graphite coating. When scraping slag, the blade can slightly retract when squeezed by hard lumps, thus avoiding the blade from being rigidly jammed with the groove body. The inner ring 432 has multiple limiting holes on the side near the mounting block 42. Multiple limiting rods 5 are fixedly connected to the mounting block 42 in a ring shape and are slidably disposed inside the limiting holes.

[0027] Traditional blade buffer structures lack adjustment mechanisms, resulting in asynchronous deflection of multiple blades, which leads to uneven melt flow and uneven casting wall thickness. Furthermore, the blades lack a reset and scraping structure, causing frequent mold blockage due to residue accumulation in the flow channel. This necessitates machine shutdown for disassembly and cleaning, resulting in poor production continuity. The blade component 41 lacks an adaptive feedback structure and cannot automatically adjust the buffer damping based on the impact force of the melt itself, requiring manual replacement of the stop block. The metal damping buffer fitting 44 provides an axial floating buffer base. The piston rod 442 drives the mounting block 42 to move back and forth synchronously. The upper limit rod 5 of the mounting block 42 cooperates with the limiting hole of the inner ring 432 to ensure the synchronous axial displacement of the adjusting component 43. The melt impact rotating blade 411 generates a radial deflection torque. The adjusting rod 434 slides along the arc groove of the inner ring 432 to automatically adjust the blade angle, realizing the adaptive adjustment of the flow orifice diameter. The metal bellows 443 absorbs the axial impact, and the blade throttling reduces the fluid velocity, with a dual buffering synergistic effect. After the die casting is completed, the metal bellows 443 rebounds and drives the blade to move forward as a whole. In the subsequent cleaning process, the opening triangle can be scraped by the rotating blade 411 to remove the flow channel residue, integrating the three major functions of buffering and shock absorption, adaptive throttling, and flow channel self-cleaning into one.

[0028] Reference Figure 9 The metal damping buffer tube 44 includes a housing 441, a piston rod 442, a metal bellows 443, and an inflation valve 444. The housing 441 is fixedly installed inside the inlet groove. The piston rod 442 is slidably disposed inside the housing and one end extends out of the housing 441 and is rotatably connected to the mounting block 42. The metal bellows 443 is disposed on the inner wall of the end of the housing 441 away from the piston rod 442. The inflation valve 444 is fixedly connected to the end of the housing 441 and communicates with the metal bellows 443. The existing rigid stops lack automatic reset capability, and die-casting residue adheres and blocks the flow channel; the buffer stiffness cannot be matched according to different alloy melts and different injection speeds; there is no axial floating buffer structure, which causes fluid impact vibration to be directly transmitted to the frame, resulting in obvious resonance of the whole machine; The nitrogen pressure inside the metal bellows 443 can be adjusted by the inflation valve 444 to adapt to the full range of injection speeds; the axial impact of the high-pressure melt pushes the piston rod 442 to compress the metal bellows 443, and the metal bellows 443 deforms and buffers, absorbing the axial impact kinetic energy of the melt; after the impact disappears, the metal bellows 443 automatically expands and resets, without the need for an additional drive mechanism; the metal damping buffer tube 44 can reduce the vibration transmitted from the guide groove to the cavity; The shell 441 is double-layered with high-temperature resistant insulation cotton filling the middle. The split structure facilitates disassembly and maintenance. The metal corrugated pipe 443 can be replaced separately, reducing equipment maintenance costs.

[0029] Reference Figure 9 and Figure 10 The housing 441 is symmetrically provided with locking components 6 on both sides, and the locking components 6 are used to lock the position of the piston rod 442 inside the housing 441; The locking assembly 6 includes an outer tube 61, a locking rod 62, and a spacer ring 63. The outer tube 61 is fixedly connected to the side of the housing 441, and the spacer ring 63 is fixedly connected to the inside of the outer tube 61, dividing the outer tube 61 into an adjustment space and an active space. One end of the locking rod 62 is sealed and slidably disposed inside the adjustment space, and the other end is slidably disposed inside the active space. A fluid guiding assembly 7 is provided between the outer tube 61 and the hydraulic tube 33. The fluid guiding assembly 7 includes a connecting ring 71 and two fluid guiding tubes 72. The connecting ring 71 is fixedly connected to the outside of the outer tube 61 and communicates with the adjustment space. One end of the two fluid guiding tubes 72 is connected to the connecting ring 71, and the other end is connected to the two hydraulic tubes 33 respectively.

[0030] The hydraulic pipe 33 of the connecting buffer component 3 is connected to the locking components 6 on both sides of the metal damping buffer pipe 44 through the liquid guiding component 7, forming a hydraulic linkage control system. During the mold closing stage, the hydraulic oil inside the hydraulic pipe 33 is squeezed and enters the outer pipe 61 through the liquid guiding pipe 72, driving the locking rod 62 to move away from the housing 441. The hydraulic oil drives the locking rod 62 to unlock the piston rod 442, ensuring the buffering effect of the buffer component 4 during the mold filling process. During the mold opening stage after die casting is completed, the air valve 444 is opened to control the expansion of the metal bellows 443, thereby driving the piston rod 442 to move outward. Then, the hydraulic pressure of the connecting buffer component 3 is released, and the hydraulic oil inside the outer pipe 61 is reintroduced into the hydraulic pipe 33, causing the locking rod 62 to move into the housing 441, locking the position of the piston rod 442, and keeping the rotating blade 411 in a vertical axis setting, which facilitates the subsequent cleaning of the cavity.

[0031] Two independent locking components 6 are symmetrically arranged on both sides of the housing 441, which clamp the piston rod 442 at two points. After locking, the piston rod 442 is limited and cannot swing. The spacer ring 63 separates the two chambers of the outer tube 61. The extension and retraction of the locking rod 62 are precisely controlled by oil pressure, so that the piston rod 442 will not be deformed due to excessive pressure. In the locked state, the mounting block 42 is fixed in position, the limiting rod 5 and the limiting hole cooperate to constrain the inner ring 432 to prevent circumferential rotation, all blades 41 maintain a vertically unfolded posture, the right-angled side of the rotating blade 411 is perpendicular to the axis of the guide groove, and the scraping surface completely covers the entire circle of the inner wall of the flow channel; in the unlocked state, the locking rod 62 is completely retracted into the active space, there is no friction interference with the piston rod 442, the metal bellows 443 can extend and retract freely, and the blades 41 can adaptively deflect and adjust the buffer hole diameter according to the impact force of the melt, without affecting the adaptive buffering function during the mold filling process; The working oil pressure of the locking component 6 is 2-6 MPa, which is synchronized with the oil pressure of the hydraulic pipe 33 connecting the buffer component 3.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-pressure die-casting machine for metal parts with buffering and shock absorption function, comprising: The die-casting base, the mold-closing drive device, the moving mold disposed at the end of the mold-closing drive device, the injection integration device, and the fixed mold fixed at the end of the injection integration device are characterized in that four connecting buffers are provided between the fixed mold and the moving mold, and the four connecting buffers are used to limit the sliding position of the moving mold. An inlet groove is provided below the fixed mold, and the output end of the injection integrated device is connected to the inlet groove. A buffer component for slowing down the molten metal is provided inside the inlet groove. The buffer assembly includes multiple blades, a mounting block, an adjusting component, and a metal damping buffer tube. The metal damping buffer tube is fixedly installed inside the inlet groove, and its end facing the injection integration device is rotatably connected to the mounting block. The multiple blades are rotatably installed on the mounting block, and the multiple blades form a buffer ring. The adjusting component is located between the blades and the metal damping buffer tube and is used to adjust the deflection angle of the blades and change the diameter of the buffer ring.

2. The high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 1, characterized in that, The connecting buffer includes a connecting groove, a connecting column, a hydraulic pipe, a spring tube, a working piston rod, and a floating piston. The connecting groove is formed on the moving mold, and the fixed mold has an installation groove, which is symmetrically arranged with the connecting groove. The hydraulic pipe is fixedly installed inside the installation groove. The working piston rod is slidably and sealed at the end of the hydraulic pipe. The spring tube is fixedly arranged between the connecting column and the hydraulic pipe and is sleeved on the working piston rod. The floating piston is slidably arranged inside the hydraulic pipe.

3. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 1, characterized in that, The blade assembly includes a rotating blade, a connecting rod, and a rotating sleeve. The rotating blade is a right-angled triangle with its right-angled side close to the mounting block. Multiple rotating blades form a buffer ring with a frustum-shaped buffer space in the middle. The connecting rod is fixedly connected to the bottom side of the rotating blade. The rotating sleeve is fitted onto the connecting rod and is rotatably disposed inside the mounting block.

4. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 3, characterized in that, The adjusting component includes an outer ring, an inner ring, multiple adjusting grooves, and multiple adjusting rods. The outer ring is fixedly connected to the side of the metal damping buffer tube near the blade, and the mounting block is slidably and sealed inside the outer ring. The end of the metal damping buffer tube is provided with a rotating groove, and the inner ring is rotatably disposed inside the rotating groove. Multiple adjusting grooves are annularly opened on the inner side of the inner ring, and multiple adjusting rods are vertically fixedly connected to the end of the connecting rod.

5. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 4, characterized in that, The adjusting groove is an arc-shaped groove, and the adjusting rod is slidably positioned inside the adjusting groove. The adjusting rod is used to drive the connecting rod to rotate, thereby changing the deflection angle of the rotating blade.

6. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 5, characterized in that, The inner ring has multiple limiting holes on the side near the mounting block, and the mounting block has multiple limiting rods fixedly connected in a ring shape and slidably disposed inside the limiting holes.

7. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 1, characterized in that, The metal damping buffer fitting includes a housing, a piston rod, a metal bellows, and an inflation valve. The housing is fixedly installed inside the inlet groove. The piston rod is slidably and sealed inside the housing, with one end extending out of the housing and rotatably connected to the mounting block. The metal bellows is located on the inner wall of the end of the housing away from the piston rod. The inflation valve is fixedly connected to the end of the housing and communicates with the metal bellows.

8. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 7, characterized in that, The housing is symmetrically provided with locking components on both sides, which are used to lock the position of the piston rod inside the housing.

9. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 8, characterized in that, The locking assembly includes an outer tube, a locking rod, and a spacer ring. The outer tube is fixedly connected to the side of the housing, and the spacer ring is fixedly connected inside the outer tube, dividing the outer tube into an adjustment space and an active space. One end of the locking rod is sealed and slidably disposed inside the adjustment space, and the other end is slidably disposed inside the active space.

10. A high-pressure die-casting machine for metal parts with buffering and shock absorption function according to claim 9, characterized in that, A fluid guiding assembly is provided between the outer tube and the hydraulic tube. The fluid guiding assembly includes a connecting ring and two fluid guiding tubes. The connecting ring is fixedly connected to the outside of the outer tube and communicates with the adjustment space. One end of each of the two fluid guiding tubes is connected to the connecting ring, and the other end is connected to the two hydraulic tubes respectively.

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