Die casting device for processing aluminum alloy fittings in cleaning equipment

Abstract

The application relates to the field of aluminum alloy die casting technology and discloses a die casting device for processing aluminum alloy accessories in cleaning equipment, which comprises a base, a barrel, a compression rod, a punch, an expansion ring, a mounting frame, a plurality of laser range finders, a baffle and a plurality of jacks. The expansion ring is in an open ring structure, the side surface of the expansion ring is provided with a limiting groove on both sides of the opening, the baffle is slidably arranged in the punch in the radial direction and abuts against the opening end surface of the expansion ring, the baffle is provided with a fixing rod which is slidably matched with the limiting groove, the plurality of laser range finders are evenly arranged on the outer wall of the barrel in the circumferential direction and are used for detecting the radial expansion amount of each circumferential position of the outer wall of the barrel in real time, the control system independently controls the corresponding jacks to push the expansion ring in the corresponding section outward according to the detection values, and the baffle drives the expansion ring to contract and reset through the fixing rod and the limiting groove when the baffle contracts in the radial direction. The application solves the problem that the sealing failure is caused by the uneven heating of the barrel during the die casting process and improves the sealing reliability of the compression.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy die casting technology, specifically to a die casting device for processing aluminum alloy parts in cleaning equipment. Background Technology

[0002] Cleaning equipment (such as vacuum cleaners and robotic vacuum cleaners) extensively uses aluminum alloy die castings as core structural components such as chassis, mounting frames, and motor housings. These components have thin walls and complex structures, requiring high dimensional accuracy and internal quality, and must also possess both high strength and lightweight characteristics. They are typically made of high-strength, high-toughness, and lightweight die-cast aluminum alloys.

[0003] In the die casting process, molten aluminum alloy is injected into the barrel of the die casting machine. The injection rod drives the punch to push the molten metal through the injection channel into the mold cavity formed by mold closing. After cooling and solidification, aluminum alloy die castings are obtained.

[0004] However, in actual production, after the high-temperature molten metal is injected into the barrel, it settles at the bottom due to gravity. The lower layer of molten metal directly contacts the inner wall of the barrel and exchanges heat with it. Meanwhile, the heat transfer coefficient between the upper layer of high-temperature air and the inner wall is much lower than that of the molten metal. This results in the lower layer of the barrel being significantly warmer than the upper layer, creating a large temperature gradient. Consequently, the barrel undergoes non-uniform thermal expansion along its circumference. When a punch with a fixed diameter moves within this deformed barrel, a large gap forms between the punch and the location of the largest expansion. The molten metal leaks along this gap, not only wasting the molten metal but also causing seal failure. This prevents the injection pressure from being effectively established, directly affecting the forming quality of the aluminum alloy die casting and leading to a reduction in the dimensional accuracy and internal quality of the high-strength, high-toughness, and lightweight die casting. Summary of the Invention

[0005] The purpose of this invention is to provide a die-casting device for processing aluminum alloy parts in cleaning equipment, so as to solve the problems mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A die-casting device for processing aluminum alloy parts in a cleaning equipment, comprising: A base on which a mold-closing assembly is mounted; The material cylinder is located on one side of the mold closing assembly; The injection rod has one end inserted into the barrel and is fixedly connected to a punch. An expansion ring is fitted onto the outside of the punch. It has an open ring structure and a limiting groove is provided on both sides of the opening. The mounting frame is fixed on the injection rod, and multiple laser rangefinders are evenly arranged on the mounting frame along the circumference of the outer wall of the material cylinder; A baffle is slidably disposed in the punch along the radial direction, and one side of the baffle abuts against the open end face of the expansion ring to seal the opening gap. The baffle is provided with a fixing rod that is slidably fitted in the limiting groove. Multiple top blocks are slidably arranged radially inside the punch, and the positions of the multiple top blocks correspond one-to-one with the positions of multiple laser rangefinders. The laser rangefinder detects the radial expansion at each circumferential position on the outer wall of the cylinder and controls the corresponding top block to push the expansion ring outward. When the baffle contracts radially, the expansion ring contracts and resets through the fixing rod and the limiting groove.

[0007] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, the mold closing assembly includes a fixed mold base fixedly disposed on the base and a movable mold base slidably disposed on the base. A fixed mold is fixed on the fixed mold base, and a movable mold is fixed on the movable mold base. When the movable mold and the fixed mold are closed, a mold cavity is formed.

[0008] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: the material cylinder is fixedly disposed on the fixed mold base, and one end of the material cylinder is connected to the mold cavity.

[0009] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: a push block is slidably arranged inside the punch along the axial direction, the end of the push block is provided with a guide slope, and the inner side of the top block abuts against the guide slope.

[0010] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: a sliding plate is slidably connected inside the injection rod, and a first electric push rod is connected between the sliding plate and multiple push blocks.

[0011] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: a central rod is fixed in the middle of the slide plate, a sliding groove is provided in the baffle, a sliding seat is slidably arranged in the sliding groove, a spring is provided between the sliding seat and the end of the sliding groove, and a connecting rod is rotatably connected between the central rod and the sliding seat.

[0012] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: a fixed seat is fixed inside the injection rod, and a second electric push rod is connected between the fixed seat and the slide plate.

[0013] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: the material cylinder is provided with a liquid inlet, and the baffle and the laser rangefinder are arranged offset from the liquid inlet in the circumferential direction of the material cylinder.

[0014] As a preferred embodiment of the die-casting device for processing aluminum alloy parts in the cleaning equipment of the present invention, wherein: the open end of the expansion ring is configured as a Z-shaped opening, and when the expansion ring expands radially, the Z-shaped opening slides open along the overlapping surface and maintains a sealed fit.

[0015] As a preferred embodiment of the die-casting device for aluminum alloy parts processing in the cleaning equipment of the present invention, wherein: a plurality of cantilever arms arranged along the axial direction are fixed on the mounting frame, a plurality of laser rangefinders are respectively fixed to the ends of the plurality of cantilever arms, and the cantilever arms span the outside of the material cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a laser rangefinder that moves synchronously with the injection rod to continuously measure the outer wall of the barrel at the axial position of the expansion ring, thereby acquiring the radial expansion amount at each circumferential position of the barrel in real time. Based on this, the control system independently controls each top block to push the corresponding section of the expansion ring outward, so that the outward expansion amount at each position of the expansion ring matches the expansion amount at the corresponding position of the inner wall of the barrel in real time. This prevents the molten metal from leaking along the gap, ensures that the injection pressure is effectively established, and guarantees the forming quality of the aluminum alloy die casting. At the same time, the baffle always abuts against the opening end face of the expansion ring, forming a continuous seal on the opening gap, preventing the molten metal from seeping into the opening during the expansion of the expansion ring, ensuring that the expansion ring can smoothly shrink and reset after injection, and preventing the loss of adaptive adjustment ability due to the solidification and blockage of the molten metal.

[0017] 2. Multiple laser rangefinders are evenly arranged along the circumference of the outer wall of the barrel, which can simultaneously detect the difference in expansion at different circumferential positions of the barrel. This accurately reflects the non-uniform expansion state of the barrel caused by the circumferential temperature gradient, providing precise real-time feedback signals for the independent control of each top block, thereby ensuring that the outer contour of the expansion ring and the deformation contour of the barrel are consistent at each circumferential position.

[0018] 3. Multiple top blocks are slidably arranged radially inside the punch. Each top block is independently driven by a corresponding first electric push rod through the cooperation of the push block and the inclined surface. The axial displacement of the push block is accurately converted into the radial displacement of the top block, realizing independent adjustment of the outward expansion of each circumferential section of the expansion ring. This allows the expansion ring to make corresponding adjustments for the expansion differences in different directions of the barrel, ensuring a tight fit between the expansion ring and the irregular inner wall, thereby ensuring the forming quality of the aluminum alloy die casting.

[0019] 4. Under the action of spring force, the baffle always abuts against the inner wall of the barrel and fits against the open end face of the expansion ring, forming a continuous seal on the opening gap, effectively preventing the molten metal from seeping in and solidifying along the Z-shaped opening gap, ensuring that the expansion ring can smoothly shrink and reset after injection, avoiding the expansion ring from being unable to shrink due to the solidification and blockage of the molten metal, and ensuring the long-term stable operation of the equipment.

[0020] 5. The baffle and the expansion ring are slidably engaged by a fixed rod and a limiting groove. After the injection is completed, the control system first controls the first electric push rod to unload, and then drives the slide plate, the center rod and the connecting rod to pull the slide block through the second electric push rod, so that the baffle contracts radially and drives the expansion ring to actively contract and reset through the fixed rod and the limiting groove. This ensures that the expansion ring has no contact friction with the inner wall of the barrel during the return stroke, effectively reducing the return resistance and significantly improving the service life of the punch and the expansion ring. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0023] Figure 3 This is a schematic cross-sectional view of the barrel assembly structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the first three-dimensional structure of the injection rod assembly of the present invention.

[0025] Figure 5 This is a schematic diagram of the second three-dimensional structure of the injection rod assembly of the present invention.

[0026] Figure 6 This is a schematic diagram of the first cross-sectional structure of the punch assembly of the present invention.

[0027] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle.

[0028] Figure 8 This is a schematic diagram of the second cross-sectional structure of the punch assembly of the present invention.

[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of the top block assembly of the present invention.

[0030] Figure 10 This is a cross-sectional view of the baffle assembly structure of the present invention.

[0031] Figure 11 This is an exploded view of the expansion ring assembly of the present invention.

[0032] Figure 12 for Figure 11 Enlarged structural diagram at point B.

[0033] In the diagram: 1. Base; 2. Moving mold base; 21. Moving mold; 3. Fixed mold base; 31. Fixed mold; 32. Barrel; 321. Liquid inlet; 4. Injection rod; 41. Punch; 42. Expansion ring; 421. Z-shaped opening; 422. Limiting groove; 43. Baffle; 431. Slide groove; 432. Fixing rod; 44. Top block; 45. Center rod; 451. Connecting rod; 452. Spring; 453. Slide seat; 46. Slide plate; 461. First electric push rod; 462. Push block; 47. Fixed base; 48. Second electric push rod; 5. Mounting bracket; 51. Cantilever; 52. Laser rangefinder. Detailed Implementation

[0034] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific configurations and algorithms presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description in order to avoid unnecessarily obscuring the invention.

[0035] Example 1, referring to Figures 1-12 As a first embodiment of the present invention, a die-casting device for processing aluminum alloy parts in a cleaning device is provided. This die-casting device for processing aluminum alloy parts in a cleaning device includes: Base 1, on which a mold closing assembly is provided; The material cylinder 32 is located on one side of the mold closing assembly; The injection rod 4 has one end extending into the material cylinder 32 and is fixedly connected to the punch 41; The expansion ring 42 is sleeved on the outside of the punch 41. It is an open ring structure, and its side is provided with limiting grooves 422 on both sides of the opening. The expansion ring 42 is made of high temperature resistant hot work die steel, which has good high temperature strength and thermal fatigue resistance, and can maintain stable elastic deformation ability under frequent temperature cycles. Mounting frame 5 is fixed on injection rod 4. Multiple laser rangefinders 52 are evenly arranged on the mounting frame 5 along the outer wall of material cylinder 32. The baffle 43 is slidably disposed in the punch 41 along the radial direction, and one side of it abuts against the open end face of the expansion ring 42 to seal the opening gap. The baffle 43 is provided with a fixing rod 432 that is slidably fitted in the limiting groove 422. The baffle 43 is made of heat-resistant steel. Multiple top blocks 44 are radially slidably disposed inside the punch 41, and the positions of the multiple top blocks 44 correspond one-to-one with the positions of the multiple laser rangefinders 52. The laser rangefinder 52 detects the radial expansion at each circumferential position on the outer wall of the barrel 32 and controls the corresponding top block 44 to push the expansion ring 42 outward. When the baffle 43 contracts radially, the expansion ring 42 contracts and resets through the fixing rod 432 and the limiting groove 422.

[0036] Since the mounting bracket 5 is fixed on the injection rod 4, it moves synchronously with the injection rod 4 and the punch 41, and the measuring position of each laser rangefinder 52 and the expansion ring 42 always remain in the same axial position.

[0037] The mold closing assembly includes a fixed mold base 3 fixedly disposed on the base 1 and a movable mold base 2 slidably disposed on the base 1. A fixed mold 31 is fixed on the fixed mold base 3, and a movable mold 21 is fixed on the movable mold base 2. When the movable mold 21 and the fixed mold 31 are closed, a mold cavity is formed.

[0038] The material cylinder 32 is fixedly mounted on the fixed mold base 3, and one end of the material cylinder 32 is connected to the mold cavity.

[0039] The material cylinder 32 is provided with a liquid inlet 321, and the baffle 43 and the laser rangefinder 52 are arranged in a staggered manner around the material cylinder 32 and the liquid inlet 321.

[0040] The opening end of the expansion ring 42 is set as a Z-shaped opening 421. When the expansion ring 42 expands radially, the Z-shaped opening 421 slides open along the overlapping surface and maintains a sealing fit.

[0041] Multiple cantilever arms 51 arranged along the axial direction are fixed on the mounting frame 5, and multiple laser rangefinders 52 are respectively fixed to the ends of the multiple cantilever arms 51. The cantilever arms 51 span the outside of the material cylinder 32.

[0042] The base 1 is also equipped with a moving mold plate drive mechanism, which drives the moving mold base 2 to slide along the base 1 to realize the mold closing and opening actions. The fixed mold 31 and the moving mold 21 are equipped with cooling water channels to regulate the mold temperature and ensure the uniformity of the cooling and solidification of the die casting. The top of the fixed mold 31 is equipped with an exhaust channel (not shown in the figure), which is connected to the filling end of the mold cavity to discharge the gas in the mold cavity.

[0043] One end of the injection rod 4 is connected to the injection drive device. The injection drive device includes an injection cylinder and a hydraulic control system, which drives the injection rod 4 to move axially along the barrel 32, thereby driving the punch 41 to push the molten metal in the barrel 32 into the mold cavity. During the injection process, the punch 41 first moves forward at a low speed, pushing the molten metal in the barrel 32 to the vicinity of the inlet, so that the molten metal fills the front end of the barrel 32 and expels some gas; then the punch 41 moves forward at high speed, quickly filling the mold cavity with molten metal, so that the molten metal fills the cavity in a short time and prevents premature solidification; finally, after the fast injection is completed, the punch 41 continues to maintain high pressure, applying holding pressure to the molten metal in the mold cavity to compensate for the volume reduction caused by the cooling and shrinkage of the molten metal, ensuring that the die casting is dense inside.

[0044] During use, high-temperature aluminum alloy molten metal is injected into the barrel 32 through the inlet 321. Due to gravity, the molten metal is deposited at the bottom of the barrel 32, resulting in a two-phase coexistence of high-temperature molten metal at the bottom and high-temperature air at the top. The lower layer of molten metal is in direct contact with the inner wall of the barrel 32 and undergoes intense heat exchange, causing the temperature of the lower layer of the barrel 32 to rise rapidly. The convective heat transfer coefficient between the upper layer of high-temperature air and the inner wall of the barrel 32 is much lower than that between the molten metal and the inner wall, resulting in a significantly lower rate of temperature rise in the upper layer of the barrel 32 than in the lower layer. A significant temperature gradient is formed between the lower and upper layers of the barrel 32, causing uneven thermal expansion of the barrel 32 along the circumference and a non-uniform radial displacement distribution on the inner wall of the barrel 32.

[0045] Each laser rangefinder 52 emits a laser beam to the corresponding circumferential position on the outer wall of the cylinder 32 in real time and receives the reflected light signal. It continuously measures the radial displacement of the outer wall of the cylinder 32 at each circumferential position at the axial position of the expansion ring 42, generating multiple real-time displacement signals. Each laser rangefinder 52 transmits the measured radial expansion of the outer wall at each position to the control system. The control system independently calculates the inner wall expansion at each corresponding position based on the ratio of the inner diameter to the outer diameter of the cylinder 32 at each measurement position.

[0046] The control system independently controls the corresponding top block 44 to push the corresponding section of the expansion ring 42 outward based on the calculated expansion amount of the inner wall at each position. Specifically, each top block 44 slides outward along the radial groove inside the punch 41, and its outer end face pushes the inner wall of the expansion ring 42 at the corresponding circumferential position, so that each circumferential section of the expansion ring 42 independently overcomes the elastic resistance and expands radially outward. Each section of the expansion ring 42 expands outward by a different distance according to the expansion amount of the inner wall of its corresponding barrel 32. The position with a large expansion amount corresponds to a large expansion amount, and the position with a small expansion amount corresponds to a small expansion amount. Thus, the outer contour of the expansion ring 42 forms a contour that matches the irregular deformation cross section of the barrel 32, and each circumferential position is tightly fitted to the corresponding position of the inner wall of the barrel 32. Through the above process, the present invention effectively avoids the expansion of the sealing gap after irregular deformation caused by uneven heating of the barrel circumferentially, prevents the leakage of molten metal along the gap, ensures the effective establishment of the injection pressure, and guarantees the forming quality of the aluminum alloy die casting.

[0047] After the injection is completed, the punch 41 needs to retract from the barrel 32. The control system first controls each top block 44 to release the thrust on the expansion ring 42, and then the baffle 43 retracts radially, driving the expansion ring 42 to retract and reset through the fixed rod 432 and the limiting groove 422.

[0048] During the die casting process, the gas inside the mold cavity and the first low-temperature molten metal entering the mold cavity are discharged through an overflow groove and an exhaust channel located at the filling end of the mold cavity. The overflow groove is located on the parting surface of the fixed mold 31 and the moving mold 21, at the filling end of the mold cavity, and is used to contain the first cold molten metal and guide the gas out. The exhaust channel is connected to the overflow groove, with one end extending to the outside of the mold, to discharge the gas inside the mold cavity and prevent porosity defects from occurring inside the die casting. The top of the fixed mold 31 is also provided with a slag chamber located at the filling end, which is used to collect oxide inclusions and cold material in the molten metal to prevent them from entering the mold cavity and affecting the quality of the die casting.

[0049] After die casting is completed, the control system controls the moving mold plate drive mechanism to open the mold, and the die casting is ejected from the mold cavity by the ejection mechanism set on the moving mold base 2. The matching part picking robot takes the die casting out of the mold and places it on the cooling conveyor belt. The cooling conveyor belt transports the die casting to the subsequent process for cleaning and inspection.

[0050] In each die-casting cycle, a matching release agent spraying device automatically sprays release agent onto the cavity surfaces of the fixed mold 31 and the moving mold 21 after mold opening, preventing the molten metal from sticking to the mold, ensuring smooth demolding of the die-cast parts and extending mold life. A matching holding furnace is used to melt and maintain the temperature of the aluminum alloy raw material, and an automatic molten metal feeder quantitatively adds the molten metal from the holding furnace to the inlet 321 of the material cylinder 32. All of the above peripheral equipment is uniformly controlled by a control system to achieve a fully automated die-casting cycle.

[0051] The control system is an existing industrial controller (such as a PLC or industrial computer), and its signal acquisition and drive control functions will not be described in detail here.

[0052] To address the sealing gap problem caused by irregular deformation due to uneven circumferential heating of the barrel 32 during the die casting process of aluminum alloy parts in the cleaning equipment, multiple laser rangefinders 52 that move synchronously with the injection rod 4 are installed to detect the radial expansion of the outer wall of the barrel 32 at each circumferential position at the axial position of the expansion ring 42 in real time. The control system independently controls each top block 44 to push the corresponding section of the expansion ring 42 outward, so that the outer contour of the expansion ring 42 and the irregular deformation section of the barrel 32 are matched at each circumferential position. This achieves regional adaptive compensation of the sealing gap, effectively prevents molten metal leakage, ensures the effective establishment of injection pressure, and guarantees the forming quality of the aluminum alloy die casting.

[0053] Meanwhile, a baffle 43 is provided on the open end face of the expansion ring 42. Under the action of the spring 452, the baffle 43 always fits against the open end face of the expansion ring 42 and continuously seals the Z-shaped opening 421, preventing the molten metal from seeping in along the opening gap and solidifying and blocking it. Through the sliding cooperation between the fixing rod 432 and the limiting groove 422, after the injection is completed, the baffle 43 contracts radially and drives the expansion ring 42 to actively contract and reset, so that the expansion ring 42 has no contact friction with the inner wall of the barrel 32 during the return stroke, effectively reducing the return stroke resistance and significantly improving the service life of the punch 41 and the expansion ring 42. The baffle 43 enables the expansion ring 42 to retract smoothly after the injection is completed, ensuring the continuous effectiveness of the adaptive adjustment function in each injection cycle.

[0054] Example 2, refer to Figures 3-12 This is the second embodiment of the present invention, which differs from the first embodiment in that: A push block 462 is slidably disposed inside the punch 41 along the axial direction. The end of the push block 462 is provided with a guide slope, and the inner side of the top block 44 abuts against the guide slope.

[0055] A slide plate 46 is slidably connected inside the injection rod 4, and a first electric push rod 461 is connected between the slide plate 46 and multiple push blocks 462.

[0056] A central rod 45 is fixed in the middle of the slide plate 46. A slide groove 431 is provided in the baffle 43. A slide seat 453 is slidably arranged in the slide groove 431. A spring 452 is provided between the slide seat 453 and the end of the slide groove 431. A connecting rod 451 is rotatably connected between the central rod 45 and the slide seat 453.

[0057] A fixing seat 47 is fixed inside the injection rod 4, and a second electric push rod 48 is connected between the fixing seat 47 and the slide plate 46.

[0058] During use, the control system sends independent drive commands to each first electric push rod 461 based on the detection signals from each laser rangefinder 52. Each first electric push rod 461 starts independently, pushing the corresponding push block 462 to move forward along the axial direction of the punch 41. Each push block 462, through the guide inclined surface at its end, cooperates with the inclined surface inside the corresponding top block 44, converting the axial displacement of each push block 462 into the radial outward displacement of each top block 44. Each top block 44 slides outward along the corresponding radial groove inside the punch 41, and its outer end face pushes the inner wall of the expansion ring 42 at the corresponding circumferential position, so that each circumferential section of the expansion ring 42 independently overcomes the elastic resistance and expands radially outward. Through the drive method of the first electric push rod 461, push block 462 and inclined surface cooperation, the radial displacement of the top block 44 is precisely controlled, thereby realizing the independent and precise adjustment of the outward expansion of each circumferential section of the expansion ring 42.

[0059] During the expansion of the expansion ring 42, the baffle 43, under the spring force of the spring 452, always abuts against the inner wall of the barrel 32 and adheres to the opening end face of the expansion ring 42. Specifically, when the second electric push rod 48 pushes the slide plate 46 to move closer to the punch 41, the center rod 45 pushes the slide block 453 through the connecting rod 451. The slide block 453 compresses the spring 452, and the elastic force of the spring 452 is transmitted to the baffle 43 through the slide block 453 and the connecting rod 451, so that the baffle 43 always has the tendency to push outward, so that it expands outward with the expansion ring 42 and maintains its adherence to the opening end face. At the same time, the fixing rod 432 slides in the limiting groove 422 without hindering the expansion of the expansion ring 42. The baffle 43 forms a continuous seal on the Z-shaped opening 421 from the outside, effectively preventing the molten metal from seeping in along the opening gap and solidifying and blocking it, ensuring that the expansion ring 42 can retract and reset smoothly after the injection is completed.

[0060] After injection, the control system first sends a retraction command to each of the first electric push rods 461. Each of the first electric push rods 461 drives the corresponding push block 462 to move backward, releasing the thrust on the top block 44. Then, the control system activates the second electric push rod 48, which drives the slide plate 46 to move away from the punch 41. The center rod 45 pulls the slide block 453 through the connecting rod 451, causing the slide block 453 to move to the end of the slide groove 431 near the axis of the injection rod 4. As the center rod 45 continues to move, it drives the baffle 43 to retract radially through the slide block 453 and the connecting rod 451. The baffle 43 drives the expansion ring 42 to actively retract and reset through the fixed rod 432 and the limiting groove 422. Specifically, the fixed rod 432 moves radially inward with the baffle 43, slides in the limiting groove 422, and drives the two ends of the expansion ring 42 to retract inward, causing the expansion ring 42 to contract.

[0061] During the contraction of the expansion ring 42, each top block 44 is driven by the expansion ring 42 to move radially inward. Each top block 44 automatically resets as the expansion ring 42 contracts. Since each first electric push rod 461 has driven the push block 462 to move backward to release the thrust on the top block 44, the contraction of the top block 44 is unimpeded.

[0062] Subsequently, the injection rod 4 is withdrawn from the barrel 32 under the drive of the drive device. Since the expansion ring 42 has actively contracted, there is no contact friction between the expansion ring 42 and the inner wall of the barrel 32 during the retraction of the punch 41, which effectively reduces the return resistance and significantly improves the service life of the punch 41 and the expansion ring 42.

[0063] During installation, the control system presets the initial position of each first electric push rod 461, ensuring that the expansion ring 42 maintains a set initial gap with the inner wall of the barrel 32 in a cold state, thus ensuring that the punch 41 can be smoothly installed into the barrel 32. After the injection begins, as the temperature rises, the control system automatically controls each first electric push rod 461 to push the corresponding push block 462 according to the real-time measurement value of the laser rangefinder 52, so that the expansion ring 42 expands outward to fill the thermal expansion gap and achieves adaptive sealing. When the injection ends and retracts, the control system first controls each first electric push rod 461 to unload, and then controls the second electric push rod 48 to pull the slide plate 46 and the center rod 45. Through the transmission chain of the connecting rod 451, slide block 453, baffle 43, fixed rod 432 and limiting groove 422, the expansion ring 42 is forcibly contracted, eliminating retraction friction.

[0064] Through the above structure, the expansion ring 42 can make corresponding adjustments to the expansion difference in different directions of the barrel 32, ensuring that the expansion ring 42 fits tightly with the irregular inner wall, avoiding the local gap increase caused by the traditional integral sealing ring which can only expand uniformly and cannot match irregular deformation, thereby ensuring the forming quality of aluminum alloy die castings.

[0065] The remaining structure is the same as that in Example 1.

[0066] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art, based on a study of the drawings, specification, and claims, should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A die-casting device for processing aluminum alloy parts in a cleaning equipment, characterized in that, include: A base on which a mold-closing assembly is mounted; The material cylinder is located on one side of the mold closing assembly; The injection rod has one end inserted into the barrel and is fixedly connected to a punch. An expansion ring is fitted onto the outside of the punch. It has an open ring structure and a limiting groove is provided on both sides of the opening. The mounting frame is fixed on the injection rod, and multiple laser rangefinders are evenly arranged on the mounting frame along the circumference of the outer wall of the material cylinder; A baffle is slidably disposed in the punch along the radial direction, and one side of the baffle abuts against the open end face of the expansion ring to seal the opening gap. The baffle is provided with a fixing rod that is slidably fitted in the limiting groove. Multiple top blocks are slidably arranged radially inside the punch, and the positions of the multiple top blocks correspond one-to-one with the positions of multiple laser rangefinders. The laser rangefinder detects the radial expansion at each circumferential position on the outer wall of the cylinder and controls the corresponding top block to push the expansion ring outward. When the baffle contracts radially, the expansion ring contracts and resets through the fixing rod and the limiting groove.

2. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 1, characterized in that: The mold-closing assembly includes a fixed mold base fixedly disposed on the base and a movable mold base slidably disposed on the base. A fixed mold is fixed on the fixed mold base, and a movable mold is fixed on the movable mold base. When the movable mold and the fixed mold are closed, a mold cavity is formed.

3. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 2, characterized in that: The material cylinder is fixedly mounted on the mold base, and one end of the material cylinder is connected to the mold cavity.

4. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 1, characterized in that: A push block is slidably disposed inside the punch along the axial direction. The end of the push block is provided with a guide slope, and the inner side of the top block abuts against the guide slope.

5. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 4, characterized in that: A sliding plate is slidably connected inside the injection rod, and a first electric push rod is connected between the sliding plate and multiple push blocks.

6. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 5, characterized in that: A central rod is fixed in the middle of the slide plate, a sliding groove is provided in the baffle, a sliding seat is slidably arranged in the sliding groove, a spring is provided between the sliding seat and the end of the sliding groove, and a connecting rod is rotatably connected between the central rod and the sliding seat.

7. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 5, characterized in that: A fixed base is fixed inside the injection rod, and a second electric push rod is connected between the fixed base and the slide plate.

8. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 1, characterized in that: The material cylinder is provided with a liquid inlet, and the baffle and the laser rangefinder are arranged circumferentially away from the liquid inlet.

9. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 1, characterized in that: The opening end of the expansion ring is configured as a Z-shaped opening. When the expansion ring expands radially, the Z-shaped opening slides open along the overlapping surface and maintains a sealed fit.

10. The die-casting device for processing aluminum alloy parts in a cleaning equipment according to claim 1, characterized in that: The mounting frame is fixed with multiple cantilever arms arranged along the axial direction, and multiple laser rangefinders are respectively fixed to the ends of the multiple cantilever arms. The cantilever arms span the outside of the material cylinder.

Images