A die casting apparatus for die casting an aluminum alloy machine tool

Abstract

The application relates to the technical field of casting, and particularly discloses a die-casting device for machine tool aluminum alloy die-castings, which comprises a base, a liquid pump, a three-way electromagnetic valve, a mold structure and a demolding structure; a communication port penetrating through an upper wall is formed in the middle of the left end of the base; a liquid cavity is arranged at the right end of the base; the liquid pump is fixedly arranged in the communication port of the base and close to the rear end; the liquid inlet end of the liquid pump is connected with the rear end of the liquid cavity through a pipeline; the three-way electromagnetic valve is fixedly arranged on the left side of the liquid pump; the mold structure is detachably arranged on the left end of the base; and the demolding structure is fixedly arranged below the mold structure; the mold is convenient and efficient to replace, has high adaptability, is soft and safe in a liquid impact demolding process, protects the quality of workpieces, integrally integrates preheating and liquid pretreatment functions, improves forming stability, can provide power through the liquid pump, realizes multi-mode liquid spraying or driving demolding, adapts to diversified die-casting scenes, and improves the universality of the equipment.

Description

Technical Field

[0001] This invention relates to the field of casting technology, specifically to a die-casting device for aluminum alloy die-casting parts for machine tools. Background Technology

[0002] In the machine tool manufacturing field, aluminum alloy die castings are widely used in the production of key parts such as machine tool structural components and transmission components due to their lightweight, high strength, and good mechanical properties. Die casting, as a highly efficient forming technology, relies on applying pressure to aluminum alloys through molds for cold casting, or injecting molten aluminum alloy followed by rapid filling and cooling. However, existing die casting equipment for machine tool aluminum alloy parts still faces the following technical challenges in practical applications:

[0003] Insufficient mold adaptability: Traditional die casting equipment molds are mostly fixed as a whole. When it is necessary to produce die castings of different specifications or shapes, the whole mold needs to be replaced. Not only is the disassembly and assembly process cumbersome and time-consuming, but the mold also wears out after long-term use, affecting the size of the castings. The one-piece mold is inconvenient to replace.

[0004] Demolding process can easily damage castings: After forming, aluminum alloy die castings have a strong adhesion to the mold cavity. Traditional demolding methods often rely on manual prying and picking with clamps, which can easily lead to scratches, deformation or even cracks on the surface of the castings. This is especially true for thin-walled and complex machine tool parts, resulting in a high scrap rate. Summary of the Invention

[0005] The purpose of this invention is to solve the existing technical problems of difficult demolding and easy damage to workpieces, and to provide a die-casting device for aluminum alloy die-casting parts for machine tools. The device facilitates the replacement of mold slots or replacement after wear through a detachable inner mold base, and uses flexible liquid contact to assist demolding.

[0006] To address the aforementioned problems, the present invention provides the following technical solution: a die-casting device for aluminum alloy die-casting parts for machine tools, comprising a base, a liquid pump, a three-way solenoid valve, a mold structure, and a demolding structure; the base has a communication port penetrating the upper wall at the middle of its left end, a liquid cavity at the right end of the base, and an injection port communicating with the liquid cavity at the upper wall of the right end of the base; the liquid pump is fixedly installed in the communication port of the base and near the rear end; the liquid inlet end of the liquid pump is connected to the rear end of the liquid cavity through a pipe; the three-way solenoid valve is fixedly installed on the left side of the liquid pump, and one end of the three-way solenoid valve is connected to the liquid cavity through a pipe. The pipe is connected to the rear wall of the liquid chamber. One end of the three-way solenoid valve is connected to the liquid pump outlet through the pipe. The mold structure is detachably mounted on the left end of the base and corresponds to the communication port. The demolding structure is fixedly installed below the mold structure and is located inside the communication port of the base. The base provides support height and stores demolding liquid or coolant. The liquid pump and solenoid valve provide a way to supply demolding liquid. The mold structure is used for extrusion molding and facilitates mold cavity replacement. The demolding structure is used to assist in demolding after molding and sprays demolding liquid or coolant.

[0007] Preferably, the mold structure includes a main mold base, a fixing screw, an inner mold base, and a liquid guide tube; the main mold base is convex, detachably mounted on the left end of the base and located at the communication port, the main mold base is fixed by bolts, the bottom of the left and right side walls of the main mold base has through heating ports, and the lower wall of the heating ports has a first mounting port corresponding to the communication port in the middle, the upper wall of the main mold base has an inset port in the middle, and the lower wall of the inset port has a plurality of equally spaced mounting holes near the four corners. The first lifting hole is penetrating through the main mold. A liquid infusion hole is provided in the middle of the right side wall of the main mold bottom. The liquid infusion holes are connected in series with the first lifting hole near the top. The fixing screws are detachably screwed to the left and right side walls of the main mold bottom and are connected to the inner cavity. The inner mold base is detachably embedded in the inner cavity of the main mold bottom and is limited by the sleeve fixing screw. One end of the liquid guide tube is fixedly connected to the liquid infusion hole and is located on the right side of the main mold bottom. The other end of the liquid guide tube is connected to the three-way solenoid valve.

[0008] Preferably, a mold groove is provided in the middle of the upper wall of the inner mold base, and a spray hole corresponding to the first lifting hole is provided in the lower wall of the mold groove.

[0009] Preferably, the demolding structure includes a drive frame, a housing, a motor, and a demolding unit; the drive frame is convex, and the bottom of the drive frame is a rectangular frame structure; the upper wall of the drive frame has a second lifting hole corresponding to the first lifting hole; the middle of the upper wall of the drive frame has a lifting groove; the drive frame is detachably mounted on the bottom wall of the main mold; the bottom of the drive frame is located in the communication port of the base; and the top of the drive frame is inserted into the middle of the heating port of the bottom of the main mold; the housing is fixedly mounted on the front side wall of the drive frame and near the right end; the motor is fixedly mounted inside the housing, and the motor drive end is opposite to the drive frame; and the demolding unit is movably mounted inside the bottom end of the drive frame.

[0010] Preferably, the second lifting hole of the drive frame is sealed and connected to the first lifting hole.

[0011] Preferably, the demolding unit includes a pair of springs, a support plate, several punches, a rack, an axle, a wheel body, and several teeth; the pair of springs are symmetrically arranged on the lower inner wall of the bottom end of the drive frame, and are located at opposite ends; both ends of the support plate are fixedly mounted on the other ends of the springs, and the support plate is located between the springs; several punches are fixedly mounted on the upper wall of the support plate, and the other ends of the punches respectively movably pass through the second lifting hole and the first lifting hole; the other ends of the punches are respectively inserted into the spray holes of the inner mold base, and the punches fit into the lower wall of the mold groove. The rack is fixedly installed in the middle of the right side wall of the support plate, and the rack is movably inserted into the lifting groove. The two ends of the axle respectively movably pass through the front and rear side walls of the drive frame, and the axle is located on the right side of the rack. One end of the axle is located in the housing and connected to the motor drive end. The wheel body is fixedly mounted on the axle, and the wheel body corresponds to the rack. The wheel body is cylindrical, and several mating grooves are equally spaced on the side wall of the wheel body and arranged equally in a clockwise direction. Several teeth are detachably installed in the mating grooves of the wheel body, and the teeth are fixed by bolts. The teeth mesh with the rack.

[0012] Preferably, the pallet descends and compresses the spring to store energy, which then drives the punch rod to impact upwards, and the teeth are assembled with the wheel body to form a half-gear structure.

[0013] Preferably, different numbers of teeth result in different descent heights of the rack and support plate, and consequently, different amounts of force stored.

[0014] Preferably, when the punch is subjected to force and descends within the first and second lifting holes, if there is a molded workpiece in the inner mold base, liquid will be automatically drawn through the liquid inlet and liquid guide pipe.

[0015] Preferably, the liquid inside the spray nozzle is pushed up by a punch rod to exert force on the molded workpiece for demolding.

[0016] The die-casting device for aluminum alloy die-casting parts for machine tools proposed in this invention has the following advantages:

[0017] 1. The mold body structure adopts a detachable design. The inner mold base is nested and limited to the bottom of the main mold by fixing screws. The inner mold base can be quickly replaced by simply removing the bolts and fixing screws. This design can not only flexibly adapt to the forming needs of workpieces of different shapes and specifications (by replacing the inner mold base with different mold grooves), but also facilitate the replacement of the inner mold base to ensure forming accuracy after the mold groove is worn during the demolding process. This greatly shortens the mold changeover time and improves production flexibility.

[0018] 2. The demolding structure achieves demolding through the synergistic effect of mechanical energy storage (spring compression and storage) and liquid: The motor drives the wheel to descend, causing the support plate to compress the spring and store energy. After the teeth disengage, the spring returns to its original position, and the punch rises rapidly, pushing the liquid in the nozzle to flexibly impact the workpiece. Liquid contact replaces the traditional rigid push, which can effectively avoid scratches, deformation or cracking of thin-walled or complex-structured workpieces due to uneven demolding force, and significantly reduce the scrap rate.

[0019] 3. A heating port is provided at the bottom of the main mold, which can be used in conjunction with external equipment to heat the mold during the forming process, reducing the temperature difference between the mold and the molten aluminum alloy and avoiding casting defects caused by temperature fluctuations. When demolding, liquid will remain in the mold groove, which is equivalent to pre-treating the mold release agent in advance for the next casting, reducing additional spraying steps and improving continuous production efficiency. With the cooperation of liquid pump and three-way solenoid valve, automatic extraction and precise supply of mold release liquid can be achieved without manual intervention. If a symmetrical mold design is adopted, the liquid pump can provide power to achieve bidirectional liquid spraying or drive demolding, adapting to diverse die casting scenarios and improving the versatility of the equipment.

[0020] 4. The overall device is mainly mechanical (such as gear and rack transmission, spring energy storage, bolt fixing, etc.), without a complex electronic control system, resulting in a low failure rate and easy maintenance; the design of detachable parts (such as inner mold base and teeth) means that only individual parts need to be replaced after wear, without the need for overall maintenance, reducing long-term use costs.

[0021] 5. From mold changing and heating temperature control to automatic demolding and pretreatment, each link forms a closed loop and works together, reducing manual operation steps and improving production efficiency per unit time; at the same time, the design of liquid flexible demolding and temperature difference control directly affects the quality of castings, ensuring the consistency and stability of mass production. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first assembly structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the second assembly structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the disassembled structure of the phantom body of the present invention;

[0025] Figure 4 This is a schematic diagram of the assembly structure of the mold structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the disassembled demolding structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the demolding unit assembly structure of the present invention;

[0028] Figure 7 This is an enlarged schematic diagram of the wheel structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the demolding structure assembly of the present invention.

[0030] In the diagram: 1. Base, 2. Liquid pump, 3. Three-way solenoid valve, 4. Mold structure, 41. Main mold base, 42. Fixing screw, 43. Inner mold base, 44. Liquid guide pipe, 5. Demolding structure, 51. Drive frame, 52. Chassis, 53. Motor, 54. Demolding unit, 541. Spring, 542. Support plate, 543. Punch rod, 544. Rack, 545. Axle, 546. Wheel body, 547. Tooth, 61. Connecting port, 62. Injection port, 71. Heating port, 72. First mounting port, 73. Embedded port, 74. First lifting hole, 75. Liquid inlet, 81. Second lifting hole, 82. Lifting groove, 9. Connecting groove. Detailed Implementation

[0031] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] like Figures 1-8 As shown, the present invention provides a technical solution: a die-casting device for aluminum alloy die-casting parts for machine tools, including a base 1, a liquid pump 2, a three-way solenoid valve 3, a mold structure 4, and a demolding structure 5; the base 1 has a communication port 61 penetrating the upper wall at the middle of its left end, and a liquid cavity is provided at the right end of the base 1, with an injection port 62 communicating with the liquid cavity on the upper wall of the right end of the base 1; the liquid pump 2 is fixedly installed in the communication port 61 of the base 1 and near the rear end, and the liquid inlet end of the liquid pump 2 is connected to the rear end of the liquid cavity through a pipe; the three-way solenoid valve 3 is fixedly installed on the left side of the liquid pump 2, and one end of the three-way solenoid valve 3 is connected to the rear end of the liquid cavity through a pipe. The three-way solenoid valve 3 is connected to the rear wall of the liquid chamber. One end of the three-way solenoid valve 3 is connected to the liquid outlet of the liquid pump 2 through a pipe. The mold structure 4 is detachably mounted on the left end of the base 1 and corresponds to the communication port 61. The demolding structure 5 is fixedly set below the mold structure 4 and is located in the communication port 61 of the base 1. The base 1 provides support height and stores demolding liquid or coolant. The liquid pump 2 and the solenoid valve provide the supply method of demolding liquid. The mold structure 4 is used for extrusion molding and facilitates mold cavity replacement. The demolding structure 5 is used to assist demolding after molding and spray demolding liquid or coolant.

[0033] As a further embodiment of the present invention, the mold structure 4 includes a main mold base 41, a fixing screw 42, an inner mold base 43, and a liquid guide tube 44; the main mold base 41 is convex and is detachably mounted on the left end of the base 1 and located at the communication port 61. The main mold base 41 is fixed by bolts. A through heating port 71 is provided at the bottom of the left and right side walls of the main mold base 41, and a first mounting port 72 corresponding to the communication port 61 is provided in the middle of the lower wall of the heating port 71. An inner fitting port 73 is provided in the middle of the upper wall of the main mold base 41. Several through first lifting holes 74 are equidistantly arranged near the four corners of the lower wall of the inner fitting port 73. A liquid infusion hole 75 is provided in the middle of the right side wall of the main mold base 41, and the liquid infusion hole 75 is connected in series with the first lifting hole 74 near the top. The fixing screw 42 is... The inner mold base 43 is detachably screwed onto the left and right side walls of the main mold base 41 and connected to the inner cavity 73 by the fixing screw 42. The inner mold base 43 is detachably embedded in the inner cavity 73 of the main mold base 41 and is limited by the fixing screw 42. A mold groove is provided in the middle of the upper wall of the inner mold base 43, and a spray hole 10 corresponding to the first lifting hole 74 is provided in the lower wall of the mold groove. One end of the liquid guide tube 44 is fixedly connected to the liquid inlet 75 and is located on the right side of the main mold base 41. The other end of the liquid guide tube 44 is connected to the three-way solenoid valve 3. The inner mold base 43 is supported by the main mold base 41 and fixed by the fixing screw 42. The inner mold base 43 with the mold groove is then used for molding and processing. The heating port 71 of the main mold base 41 can also be used in conjunction with existing equipment for heating.

[0034] More specifically, when it is necessary to produce aluminum alloy die castings of different specifications or shapes, it is only necessary to loosen the fixing screws 42 on the left and right side walls of the main mold base 41, and the inner mold seat 43 can be taken out from the inner insert 73. Replace it with a new inner mold seat 43 with the corresponding mold groove, and then fix it again with the fixing screws 42 to complete the mold replacement. The whole process does not require disassembling the main mold base 41, which is convenient and greatly shortens the mold replacement time.

[0035] During the die casting process, the external heating equipment preheats the main mold bottom 41 and the inner mold base 43 through the heating port 71 to ensure the mold cavity temperature is stable; after the aluminum alloy molten liquid is injected into the mold cavity of the inner mold base 43, it is formed under the action of external pressure; at this time, the top of the punch 543 in the first lifting hole 74 is flush with the lower wall of the mold cavity, which does not affect the forming space.

[0036] During the demolding stage, the liquid delivered through the liquid guide pipe 44 enters the first lifting hole 74 through the liquid delivery hole 75, and is sprayed out from the spray hole 10 under the push of the punch 543, so as to achieve flexible demolding of the molded workpiece; at the same time, the liquid remains in the mold groove, which can be used as a pretreatment of the demolding agent for the next die casting, reducing additional spraying steps.

[0037] The mold structure 4 integrates functions such as quick mold replacement, temperature control, and liquid delivery, which not only improves the equipment's adaptability to different workpieces, but also provides a basic guarantee for high-quality die casting and efficient demolding.

[0038] As a further embodiment of the present invention, the demolding structure 5 includes a drive frame 51, a housing 52, a motor 53, and a demolding unit 54; the drive frame 51 is convex, and the bottom of the drive frame 51 is a rectangular frame structure; a second lifting hole 81 corresponding to the first lifting hole 74 is provided through the upper wall of the drive frame 51; a lifting groove 82 is provided in the middle of the upper wall of the drive frame 51; the drive frame 51 is detachably mounted on the lower wall of the main mold bottom 41; the bottom of the drive frame 51 is located in the communication port 61 of the base 1; and the top of the drive frame 51 is inserted into the main mold. At the center of the heating port 71 of the bottom 41, the second lifting hole 81 of the drive frame 51 is sealed and connected to the first lifting hole 74. The housing 52 is fixedly installed on the front side wall of the drive frame 51 and close to the right end. The motor 53 is fixedly installed inside the housing 52, and the drive end of the motor 53 is opposite to the drive frame 51. The demolding unit 54 is movably installed inside the bottom end of the drive frame 51. The motor 53 inside the housing 52 is started to drive the demolding unit 54 to store force, assisting in demolding after molding, and the drive frame 51 is used to limit the load of the demolding unit 54.

[0039] More specifically, the demolding structure 5 achieves the coordination of heating and heat preservation with demolding action through the precise docking of the drive frame 51 and the main mold bottom 41; the mechanical energy storage mechanism driven by the motor 53, combined with the liquid flexible demolding, ensures that the demolding force is controllable and avoids damage to the workpiece caused by rigid contact; at the same time, the detachable drive frame 51 design facilitates later maintenance and component replacement, significantly improving the practicality and reliability of the device.

[0040] As a further embodiment of the present invention, the demolding unit 54 includes a pair of springs 541, a support plate 542, several punches 543, a rack 544, a wheel axle 545, a wheel body 546, and several teeth 547; the pair of springs 541 are symmetrically arranged on the lower inner wall of the bottom end of the drive frame 51, and are located at the front and rear ends respectively; the two ends of the support plate 542 are fixedly arranged on the other end of the springs 541, and the support plate 542 is located between the springs 541; the several punches 543 are fixedly arranged on the upper wall of the support plate 542, and the other end of the punches 543 respectively movably passes through the second lifting hole 81 and the first lifting hole 7. 4. Several punches 543 have their other ends inserted into the spray holes 10 of the inner mold base 43, and the punches 543 are fitted with the lower wall of the mold groove. The rack 544 is fixedly set in the middle of the right side wall of the support plate 542, and the rack 544 is movably inserted into the lifting groove 82. The two ends of the axle 545 respectively movably pass through the front and rear side walls of the drive frame 51, and the axle 545 is located to the right of the rack 544. One end of the axle 545 is located in the machine housing 52 and is connected to the drive end of the motor 53. The wheel body 546 is fixedly fitted on the axle 545, and the wheel body 546 corresponds to the rack 544. The wheel body 546 is cylindrical, and the wheel body 546 is cylindrical. The side wall of the wheel body 546 has several equally spaced mating grooves 9, arranged clockwise. Several teeth 547 are detachably installed in the mating grooves 9 of the wheel body 546, and are fixed by bolts. The teeth 547 mesh with the rack 544. The motor 53 drives the wheel axle 545 to rotate the wheel body 546. The teeth 547 on the wheel body 546 mesh with the rack 544, causing the rack 544 to descend. The descending height of the rack 544 is changed according to the number of teeth 547, thereby changing the stored force of the descending compression spring 541 of the support plate 542. 546 forms a half-tooth gear structure. As the gear body 546 rotates, when all the teeth 547 disengage from the rack 544, the support plate 542 loses its limit. The spring 541 uses its reverse force to drive the punch 543 to rise and reset quickly. When the workpiece is extruded and formed in the inner mold base 43, the mold groove of the inner mold base 43 is blocked. The descent of the punch 543 will generate suction to automatically absorb the demolding liquid. By using the rebound force, the liquid contact is used to achieve flexible force application, which causes the formed workpiece to be lifted and demolded. As the workpiece rises, the liquid impacts the workpiece and scatters, remaining in the inner mold base 43.

[0041] More specifically, the demolding unit 54 achieves rapid impact action of the punch 543 through the design of "half-gear structure and energy storage of spring 541". With the automatic extraction of demolding fluid, it not only ensures demolding efficiency, but also avoids damage to the casting through the flexible contact of the liquid. The detachable design of the teeth 547 makes the demolding force adjustable to adapt to the needs of different workpieces. At the same time, the residual pretreatment function of the demolding fluid further improves the efficiency of continuous production. The overall structure is simple, highly reliable and easy to maintain.

[0042] As a further embodiment of the present invention, in order to enable the pallet 542 to descend and compress the spring 541 to store force and drive the punch 543 to impact upward, the teeth 547 and the wheel body 546 are assembled to form a half gear structure, which is used to drive the rack 544 to descend and store force, and to release the rack 544 and rebound using the spring 541. The number of teeth 547 is different, so the height to which the rack 544 and the pallet 542 descend is different, and thus the amount of force stored is different, which can be set according to actual needs.

[0043] As a further aspect of the present invention, when the punch 543 is subjected to force and descends within the first lifting hole 74 and the second lifting hole 81, if there is a molded workpiece in the inner mold base 43, liquid will be automatically drawn through the liquid inlet 75 and the liquid guide tube 44. The liquid will be automatically drawn and injected into the first lifting hole 74 and the spray hole 10 above the punch 543 using the principle of negative pressure. The liquid in the spray hole 10 will be pushed by the rising of the punch 543 to exert force on the molded workpiece for demolding, thereby achieving flexible force application through liquid contact and preventing deformation or damage to the aluminum alloy.

[0044] More specifically, after the workpiece is formed in the mold structure 4, the motor 53 in the machine housing 52 is started. The motor drive end drives the wheel axle 545 and wheel body 546 to rotate. The teeth 547 on the wheel body 546 mesh with the rack 544, pushing the rack 544 to move downward along the lifting groove 82 of the drive frame 51, thereby driving the support plate 542 to compress the spring 541 at the bottom, completing the mechanical energy storage. During this process, the rectangular frame structure of the drive frame 51 provides stable support for the support plate 542 and the spring 541, ensuring that there is no displacement of each component during the energy storage process.

[0045] The sealing and liquid work together: the second lifting hole 81 of the drive frame 51 is sealed and connected with the first lifting hole 74 of the main mold bottom 41 to form a closed liquid channel; when the punch 543 descends with the support plate 542, a negative pressure is generated in the channel, and the demolding liquid is automatically extracted through the liquid guide pipe 44 and the liquid delivery hole 75 to reserve liquid medium for subsequent demolding.

[0046] Flexible demolding execution: When the wheel 546 rotates until the tooth 547 disengages from the rack 544, the spring 541 releases its stored energy, pushing the support plate 542 and the punch 543 to rise rapidly; the punch 543 moves at high speed in the second lifting hole 81 and the first lifting hole 74, spraying the demolding liquid in the channel out of the spray hole 10 of the inner mold base 43. The liquid impacts the bottom of the workpiece in a flexible contact manner, and together with the lifting force of the punch 543, demolding is completed, avoiding workpiece deformation or scratches caused by rigid contact;

[0047] The demolding structure 5 realizes a flexible demolding mechanism that combines mechanical energy storage and liquid synergy. At the same time, the precise assembly of the drive frame 51 and the protective design of the chassis 52 ensure the stability and safety of the equipment operation, providing a reliable guarantee for high-quality die casting production.

[0048] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0049] The inner mold base 43 with the target workpiece mold groove is installed in the inner insertion opening 73 of the main mold base 41. The inner mold base 43 is limited by tightening the fixing screws 42 on both sides of the main mold base 41, ensuring that the spray hole 10 of the inner mold base 43 is precisely aligned with the first lifting hole 74 of the main mold base 41.

[0050] The main mold base 41 is fixed to the left end of the base 1 with bolts to support a certain height, and the demolding structure 5 is installed through the connecting port 61 of the base 1; the drive frame 51 is installed on the lower wall of the main mold base 41, and the top of the drive frame 51 penetrates the first mounting port 72 of the lower wall of the main mold base 41, so that the second lifting hole 81 and the first lifting hole 74 are sealed and connected, and at the same time, the top of the punch 543 is inserted into the spray hole 10 of the inner mold base 43 and is flush with the lower wall of the mold groove;

[0051] Secondly, the release fluid is stored in the liquid cavity of the base 1 through the injection port 62, and the liquid pump 2 and the three-way solenoid valve 3 are in the ready-to-start state; the external heating equipment heats the mold structure 4 through the heating port 71 of the main mold bottom 41, and the heating area is isolated from the release unit 54.

[0052] During die casting, molten aluminum alloy is injected into the mold cavity, or an aluminum alloy block is placed in and extruded using an external pressure device. At this time, the top of the punch 543 is flush with the lower wall of the mold cavity, which does not affect the forming space. The mold cavity ensures that the molten liquid solidifies evenly under the preheating effect.

[0053] After molding, mechanical energy storage and liquid extraction: The motor 53 inside the housing 52 is started. The drive end of the motor 53 drives the wheel axle 545 to rotate. The teeth 547 on the wheel body 546 mesh with the rack 544, pushing the rack 544 downward along the lifting groove 82 of the drive frame 51, thereby driving the support plate 542 to compress the bottom spring 541 (completing energy storage); when the support plate 542 descends, the punch 543 moves down simultaneously from the spray hole 10, the first lifting hole 74, and the second lifting hole 81, causing the spray hole 10 to... The enclosed space formed by the first lifting hole 74 increases in volume, generating negative pressure. The release liquid is automatically drawn from the liquid cavity into the channel for storage through the liquid inlet 75 and the liquid guide pipe 44. At this time, the three-way solenoid valve 3 needs to control the liquid guide pipe 44 to connect with the liquid cavity and close the connection end of the liquid pump 2. The height to which the rack 544 descends driven by the wheel axle 545 is related to the number of teeth 547 installed on the wheel body 546 using the docking groove 9. The more teeth 547 there are, the greater the descending height driven by the rack 544.

[0054] Flexible impact demolding: When the wheel 546 continues to rotate until the teeth 547 are completely disengaged from the rack 544, the support plate 542 loses its constraint, and the spring 541 releases its elastic force instantly, causing the support plate 542 to rise rapidly. The punch 543 simultaneously impacts upward, pushing the demolding fluid in the channel out of the spray hole 10. The liquid first makes flexible contact with the bottom of the casting and applies an upward thrust. Combined with the lifting force of the punch 543, the casting is pushed out of the mold groove, avoiding scratches or deformation caused by rigid contact. At the same time, with the shielding of the workpiece, the demolding fluid is impacted and scattered in the mold groove of the inner mold base 43, which can be used for the next casting, providing pre-lubrication for the next die casting and reducing subsequent spraying steps.

[0055] Diverse collaborative operation (extended usage modes): If the device adopts a symmetrical mold design, the liquid pump 2 can be started in conjunction with the three-way solenoid valve 3 to control the liquid guide pipe 44 of the upper and lower mold structures 4 to spray the release liquid synchronously; or the liquid pump 2 can be used to provide additional power to achieve relative and mutual spraying of release liquid or coolant on the upper and lower molds, thereby improving the adaptability of the device; the liquid pump 2 can also be used to provide power to demold the workpiece by liquid impact.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting apparatus for aluminum alloy die-casting parts for machine tools, characterized in that, The system includes a base (1), a liquid pump (2), a three-way solenoid valve (3), a mold structure (4), and a demolding structure (5). The base (1) has a communication port (61) penetrating the upper wall at its left center. A liquid cavity is located at the right end of the base (1), and an injection port (62) communicating with the liquid cavity is located on the upper wall of the right end of the base (1). The liquid pump (2) is fixedly installed within the communication port (61) of the base (1) and close to the rear end. The inlet end of the liquid pump (2) is connected to the rear end of the liquid cavity via a pipe. The three-way solenoid valve (3) is fixedly installed on the left side of the liquid pump (2). One end of the three-way solenoid valve (3) is connected to the rear side wall of the liquid chamber through a pipe. One end of the three-way solenoid valve (3) is connected to the liquid outlet of the liquid pump (2) through a pipe. The mold structure (4) is detachably installed on the left end of the base (1) and corresponds to the connecting port (61). The demolding structure (5) is fixedly installed below the mold structure (4) and is located in the connecting port (61) of the base (1). Among them, the base (1) provides support height and stores release liquid or coolant, the liquid pump (2) and the solenoid valve provide the supply method of release liquid, the mold structure (4) is used for extrusion molding and facilitates mold cavity replacement, the demolding structure (5) is used to assist demolding after molding and spray release liquid or coolant at the same time; The mold structure (4) includes a main mold base (41), a fixing screw (42), an inner mold base (43), and a liquid guide tube (44). The main mold bottom (41) is convex. The main mold bottom (41) is detachably mounted on the left end of the base (1) and located at the connecting port (61). The main mold bottom (41) is fixed by bolts. The bottom of the left and right side walls of the main mold bottom (41) is provided with through heating ports (71). The lower wall of the heating port (71) is provided with a first mounting port (72) corresponding to the connecting port (61). The upper wall of the main mold bottom (41) is provided with an inner opening (73). The lower wall of the inner opening (73) is provided with several through first lifting holes (74) at equal intervals near the four corners. The middle of the right side wall of the main mold bottom (41) is provided with There is an infusion hole (75), and the infusion hole (75) is connected in series with the first lifting hole (74) near the top. The fixing screw (42) is detachably screwed to the left and right side walls of the main mold bottom (41) and the fixing screw (42) is connected to the inner cavity (73). The inner mold base (43) is detachably embedded in the inner cavity (73) of the main mold bottom (41) and the inner mold base (43) is limited by the sleeve fixing screw (42). One end of the liquid guide tube (44) is fixedly connected to the infusion hole (75) and the liquid guide tube (44) is located on the right side of the main mold bottom (41). The other end of the liquid guide tube (44) is connected to the three-way solenoid valve (3). The inner mold base (43) has a mold groove in the middle of the upper wall, and the lower wall of the mold groove has a spray hole (10) corresponding to the first lifting hole (74).

2. The die-casting apparatus for aluminum alloy die-casting parts for machine tools according to claim 1, characterized in that, The demolding structure (5) includes a drive frame (51), a chassis (52), a motor (53), and a demolding unit (54); The drive frame (51) is convex, and the bottom of the drive frame (51) is a rectangular frame structure. The upper wall of the drive frame (51) is provided with a second lifting hole (81) corresponding to the first lifting hole (74). The middle part of the upper wall of the drive frame (51) is provided with a lifting groove (82). The drive frame (51) is detachably placed on the lower wall of the main mold bottom (41). The bottom of the drive frame (51) is located in the communication port (61) of the base (1), and the top of the drive frame (51) is inserted into the middle of the heating port (71) of the main mold bottom (41). The housing (52) is fixedly set on the front side wall of the drive frame (51) and close to the right end. The motor (53) is fixedly set in the housing (52), and the driving end of the motor (53) is opposite to the drive frame (51). The demolding unit (54) is movably set in the bottom end of the drive frame (51).

3. The die-casting apparatus for machine tool aluminum alloy die-casting parts according to claim 2, characterized in that, The second lifting hole (81) of the drive frame (51) is sealed and connected to the first lifting hole (74).

4. The die-casting apparatus for machine tool aluminum alloy die-casting parts according to claim 3, characterized in that, The demolding unit (54) includes a pair of springs (541), a support plate (542), several punches (543), a rack (544), a wheel axle (545), a wheel body (546), and several teeth (547). A pair of springs (541) are symmetrically arranged on the lower inner wall of the bottom end of the drive frame (51), and are located at opposite ends. The two ends of the support plate (542) are fixedly arranged on the other end of the springs (541), and the support plate (542) is located between the springs (541). A number of punches (543) are fixedly arranged on the upper wall of the support plate (542), and the other end of the punches (543) respectively movably passes through the second lifting hole (81) and the first lifting hole (74). The other end of the punches (543) is respectively inserted into the spray hole (10) of the inner mold base (43), and the punches (543) are engaged with the lower wall of the mold groove. The rack (544) is fixedly arranged in the middle of the right side wall of the support plate (542), and the rack (544) is movably inserted into the lifting groove. (82) Inside, the two ends of the axle (545) respectively movably pass through the front and rear side walls of the drive frame (51), and the axle (545) is located on the right side of the rack (544). One end of the axle (545) is located inside the housing (52) and is connected to the drive end of the motor (53). The wheel body (546) is fixedly mounted on the axle (545), and the wheel body (546) corresponds to the rack (544). The wheel body (546) is cylindrical, and several mating grooves (9) are equally spaced on the side wall of the wheel body (546) and are arranged equally clockwise. Several teeth (547) are detachably placed in the mating grooves (9) of the wheel body (546), and the teeth (547) are fixed by bolts. The teeth (547) mesh with the rack (544).

5. The die-casting apparatus for aluminum alloy die-casting parts for machine tools according to claim 4, characterized in that, The pallet (542) descends and compresses the spring (541) to store power, which drives the punch (543) to impact upward. The teeth (547) and the wheel body (546) are assembled to form a half gear structure.

6. The die-casting apparatus for aluminum alloy die-casting parts for machine tools according to claim 5, characterized in that, The number of teeth (547) is different, which causes the rack (544) and the support plate (542) to descend to different heights, and thus the amount of force stored is different.

7. The die-casting apparatus for aluminum alloy die-casting parts for machine tools according to claim 6, characterized in that, When the punch (543) is subjected to force and descends within the first lifting hole (74) and the second lifting hole (81), if there is a molded workpiece in the inner mold base (43), it will automatically draw liquid through the liquid inlet (75) and the liquid guide pipe (44).

8. The die-casting apparatus for machine tool aluminum alloy die-casting parts according to claim 7, characterized in that, The liquid inside the nozzle (10) is pushed up by the punch (543) to exert force on the molded workpiece for demolding.

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