Die casting device for aluminum alloy die casting of machine tool

Abstract

The invention relates to the technical field of casting, and particularly discloses a die casting device for a machine tool aluminum alloy die casting, which comprises a base station, a liquid pump, a three-way electromagnetic valve, a die body structure and a demolding structure, a communicating opening penetrating through the upper wall is formed in the middle of the left end of the base table, a liquid cavity is formed in the right end of the base table, the liquid pump is fixedly arranged in the communicating opening of the base table and is 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, and the three-way electromagnetic valve is fixedly arranged on the left side of the liquid pump. The mold body structure is detachably arranged at the left end of the base table, and the demolding structure is fixedly arranged below the mold body structure. The die is convenient and efficient to replace and high in adaptability, the liquid impact demolding process is soft and safe, the workpiece quality is protected, preheating and liquid pretreatment functions are integrally integrated, the forming stability is improved, power can be provided through a liquid pump, multi-mode liquid spraying or demolding driving is achieved, the die-casting device is suitable for diversified die-casting scenes, and the universality of equipment is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of casting, in particular to a die casting device for machine tool aluminum alloy die castings. BACKGROUND

[0002] In the field of machine tool manufacturing, aluminum alloy die castings are widely used in the production of key parts such as machine tool structural parts and transmission parts due to their lightweight, high strength and good mechanical properties. As a high-efficiency forming technology, the core of die casting lies in the cold casting forming of aluminum alloy by applying pressure through a mold, or the realization of rapid filling and cooling forming after injecting molten aluminum liquid. However, the die casting device for machine tool aluminum alloy die castings still has the following technical pain points in actual application: Insufficient mold adaptability: The mold of the traditional die casting device is mostly fixed as a whole. When producing die castings of different specifications or shapes, the mold needs to be replaced as a whole. This not only makes the disassembly and assembly process cumbersome and time-consuming, but also causes wear and tear of the mold after long-term use, affecting the size of the castings. The integrated mold is inconvenient to replace. Damage to castings during demolding: After forming, the aluminum alloy die casting has strong adhesion with the mold cavity. The traditional demolding method mostly relies on manual prying and picking up by clamps, which easily causes scratches, deformation and even cracking on the surface of the castings. Especially for thin-walled and complex structure machine tool parts, the scrap rate is high. SUMMARY

[0003] The purpose of the application is to solve the technical problems of existing demolding difficulty and easy damage to workpieces. The application provides a die casting device for machine tool aluminum alloy die castings, which realizes convenient replacement of the mold groove or replacement after wear by a detachable inner mold seat, and realizes power-assisted demolding by liquid flexible contact.

[0004] In order to realize the above-mentioned problem solving, the present application provides the following technical scheme: a machine tool aluminum alloy die casting device, comprising a base, a liquid pump, a three-way electromagnetic valve, a die structure and a demolding structure; the left end of the base is provided with a communication port penetrating the upper wall, the right end of the base is provided with a liquid cavity, and the upper wall of the right end of the base is provided with an injection port communicating with the liquid cavity, 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, one end of the three-way electromagnetic valve is communicated with the rear side wall of the liquid cavity through a pipeline, and the other end of the three-way electromagnetic valve is connected with the liquid outlet end of the liquid pump through a pipeline, the die structure is detachably arranged on the left end of the base and corresponds to the communication port, and the demolding structure is fixedly arranged below the die structure and located in the communication port of the base; wherein the base provides a support height and stores demolding liquid or cooling liquid, the liquid pump and the electromagnetic valve provide a demolding liquid supply mode, the die structure is used for extrusion forming and is convenient for replacing the die groove, and the demolding structure is used for assisting demolding after forming and simultaneously spraying demolding liquid or cooling liquid.

[0005] Preferably, the die structure comprises a main die bottom, a fixed screw rod, an inner die seat and a liquid guide pipe; the main die bottom is convex, the main die bottom is detachably arranged on the left end of the base and located at the communication port position, the main die bottom is fixed by bolts, the left and right side walls of the main die bottom are provided with penetrating heating ports at the bottom, the lower wall of the heating port is provided with a first mounting port corresponding to the communication port at the middle, the upper wall of the main die bottom is provided with an embedded port at the middle, a plurality of penetrating first lifting holes are equidistantly arranged on the lower wall of the embedded port close to the four corner positions, the middle of the right side wall of the main die bottom is provided with a liquid delivery hole, and the liquid delivery hole is connected with the first lifting hole close to the top end in series, the fixed screw rod is detachably screwed on the left and right side walls of the main die bottom, and the fixed screw rod is communicated with the embedded port, the inner die seat is detachably embedded in the embedded port of the main die bottom, and the inner die seat is limited by sleeving the fixed screw rod, one end of the liquid guide pipe is fixedly connected with the liquid delivery hole, and the liquid guide pipe is located on the right side of the main die bottom, and the other end of the liquid guide pipe is connected with the three-way electromagnetic valve.

[0006] Preferably, the upper wall of the inner die seat is provided with a die groove at the middle, and the inner wall of the die groove is provided with a spray hole corresponding to the first lifting hole.

[0007] Preferably, the demolding structure comprises a driving frame, a machine box, a motor and a demolding unit; the driving frame is convex, and the bottom of the driving frame is a rectangular frame structure; a second lifting hole corresponding to the first lifting hole is formed through the upper wall of the driving frame; a lifting groove is formed in the middle of the upper wall of the driving frame; the driving frame is detachably arranged under the lower wall of the main mold; the bottom of the driving frame is located in the communication port of the base; the top end of the driving frame is inserted into the middle of the heating port of the main mold bottom; the machine box is fixedly arranged on the front side wall of the driving frame close to the right end; the motor is fixedly arranged in the machine box, and the driving end of the motor is opposite to the driving frame; and the demolding unit is movably arranged in the bottom end of the driving frame.

[0008] Preferably, the second lifting hole of the driving frame is sealingly connected with the first lifting hole.

[0009] Preferably, the demolding unit comprises a pair of springs, a supporting plate, a plurality of impact rods, a rack, an axle, a wheel body and a plurality of teeth; the pair of springs are symmetrically arranged in the lower wall of the bottom end of the driving frame and located at the corresponding front and rear ends; the supporting plate is fixedly arranged on the other end of the springs and located between the springs; the impact rods are fixedly arranged on the upper wall of the supporting plate; the other ends of the impact rods are movably penetrated through the second lifting hole and the first lifting hole; the other ends of the impact rods are inserted into the injection holes of the inner mold seat; the impact rods are matched with the lower wall of the mold groove; the rack is fixedly arranged in the middle of the right side wall of the supporting plate and movably inserted into the lifting groove; the axle is movably penetrated through the front and rear side walls of the driving frame and located to the right of the rack; one end of the axle is located in the machine box and connected with the driving end of the motor; the wheel body is fixedly sleeved on the axle and matched with the rack; the wheel body is cylindrical, and a plurality of connecting grooves are equidistantly formed in the side wall of the wheel body and arranged along the clockwise direction; the teeth are detachably arranged in the connecting grooves of the wheel body and fixedly connected through bolts; and the teeth are engaged with the rack.

[0010] Preferably, when the supporting plate is compressed to store power, the impact rods are driven to upwardly impact.

[0011] Preferably, when the number of the teeth is different, the descending height of the rack and the supporting plate is different, and the power storage is different.

[0012] Preferably, when the impact rods are forced to descend in the first lifting hole and the second lifting hole, if the inner mold seat has a formed workpiece, the liquid in the inner mold seat can be automatically extracted through the injection hole and the liquid guide pipe.

[0013] Preferably, the liquid in the injection hole is quickly pushed by the impact rods to apply force to the formed workpiece to demold.

[0014] The die casting device for aluminum alloy die casting of machine tools has the following beneficial effects: 1. The mold structure adopts a removable design. The inner mold base is nested and fixed with the main mold base by fixing screws. The inner mold base can be quickly replaced by simply removing the bolts and fixing screws. This design not only flexibly adapts to the molding needs of workpieces of different shapes and specifications (by replacing the inner mold base with different mold grooves), but also allows for convenient replacement of the inner mold base to ensure molding accuracy if the mold groove is worn during the demolding process, significantly shortening mold replacement time and improving production flexibility.

[0015] 2. The demoulding structure realizes demoulding through the synergistic effect of mechanical energy storage (spring compression storage) and liquid: the motor drives the wheel body to drive the rack downward, so that the support plate compresses the spring to store energy. After the teeth are disengaged, the spring resets, and the punch rises rapidly to push the liquid in the spray hole to flexibly impact the workpiece; liquid contact replaces traditional rigid push, which can effectively avoid scratches, deformation or cracking of thin-walled or complex structure workpieces due to uneven demoulding force, significantly reducing the scrap rate.

[0016] 3. A heating port is provided at the bottom of the main mold, which can cooperate with external equipment to heat during the molding process, reduce the temperature difference between the mold and the molten aluminum alloy, and avoid casting defects caused by temperature fluctuations; during demolding, the liquid will remain in the mold groove, which is equivalent to completing the release agent pretreatment in advance for the next casting, reducing additional spraying steps and improving continuous production efficiency; relying on the cooperation of the liquid pump and the three-way solenoid valve, the demolding liquid can be automatically extracted and accurately supplied without manual intervention. If a symmetrical mold design is adopted, the liquid pump can provide power to achieve two-way liquid spraying or drive demolding, adapting to a variety of die-casting scenarios and improving the versatility of the equipment.

[0017] 4. The overall device is mainly mechanical in structure (such as rack and pinion transmission, spring energy storage, bolt fixing, etc.), without complex electronic control system, low failure rate and easy maintenance; the design of detachable parts (such as inner mold base, teeth) makes it only necessary to replace a single part after wear and tear, without the need for overall maintenance, reducing long-term use costs.

[0018] 5. From mold replacement, heating and temperature control to automatic demoulding and pretreatment, each link forms a closed-loop collaboration, reducing manual operation steps and improving production efficiency per unit time; at the same time, designs such as liquid flexible demoulding and temperature difference control directly affect the quality of castings, ensuring the consistency and stability of batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the first assembly structure of the present invention; Figure 2 This is a schematic diagram of a second assembly structure of the present invention; Figure 3 This is a schematic diagram of the split structure of the motif structure of the present invention; Figure 4 This is a schematic diagram of the assembly structure of the phantom structure of the present invention; Figure 5 Split structure schematic diagram of the demolding structure of the present application; Figure 6 Split structure schematic diagram of the demolding structure of the present application; Figure 7 Split structure schematic diagram of the demolding structure of the present application; Figure 8 Split structure schematic diagram of the demolding structure of the present application.

[0020] In the figure: 1, base, 2, liquid pump, 3, three-way electromagnetic valve, 4, die structure, 41, main die bottom, 42, fixed screw, 43, inner die seat, 44, liquid guide pipe, 5, demolding structure, 51, driving frame, 52, machine box, 53, motor, 54, demolding unit, 541, spring, 542, supporting plate, 543, punch rod, 544, rack, 545, axle, 546, wheel body, 547, tooth, 61, communication port, 62, injection port, 71, heating port, 72, first mounting port, 73, inlaid port, 74, first lifting hole, 75, liquid conveying hole, 81, second lifting hole, 82, lifting groove, 9, butt joint groove. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] As Figures 1-8 shown, the present application provides a technical solution: a die casting device for machine tool aluminum alloy die casting, comprising a base 1, a liquid pump 2, a three-way electromagnetic valve 3, a die structure 4 and a demolding structure 5; the base 1 is provided with a communication port 61 penetrating through the upper wall in the middle of the left end, the base 1 is provided with a liquid cavity at the right end, and the upper wall of the right end of the base 1 is provided with an injection port 62 communicating with the liquid cavity, the liquid pump 2 is fixedly arranged in the communication port 61 of the base 1 and close to the rear end, the liquid inlet end of the liquid pump 2 is connected with the rear end of the liquid cavity through a pipeline, the three-way electromagnetic valve 3 is fixedly arranged on the left side of the liquid pump 2, one end of the three-way electromagnetic valve 3 is communicated with the rear side wall of the liquid cavity through a pipeline, and one end of the three-way electromagnetic valve 3 is connected with the liquid outlet end of the liquid pump 2 through a pipeline, the die structure 4 is detachably arranged on the left end of the base 1 and corresponds to the communication port 61, and the demolding structure 5 is fixedly arranged below the die structure 4 and located in the communication port 61 of the base 1; wherein, the base 1 provides a supporting height and stores demolding liquid or cooling liquid, the liquid pump 2 and the electromagnetic valve provide a demolding liquid supply mode, the die structure 4 is used for extrusion forming and is convenient for replacing the die groove, and the demolding structure 5 is used for assisting demolding after forming and simultaneously spraying demolding liquid or cooling liquid.

[0023] As a further scheme of the present application, the die body structure 4 comprises a main die base 41, a fixing screw 42, an inner die seat 43 and a liquid guide pipe 44; the main die base 41 is convex, and is detachably arranged at the left end of the base 1 and at the position of the communicating port 61, and is fixed by bolts; the bottom of the left and right side walls of the main die base 41 is provided with a through heating port 71, and the middle of the lower wall of the heating port 71 is provided with a first mounting port 72 corresponding to the communicating port 61; the middle of the upper wall of the main die base 41 is provided with an inlay port 73, and the lower wall of the inlay port 73 is provided with a plurality of through first lifting holes 74 equidistantly arranged near the four corner positions; the middle of the right side wall of the main die base 41 is provided with a transfusion hole 75, and the transfusion hole 75 is connected in series with the first lifting hole 74 near the top end; the fixing screw 42 is detachably screwed on the left and right side walls of the main die base 41, and is communicated with the inlay port 73; the inner die seat 43 is detachably inlaid in the inlay port 73 of the main die base 41, and is limited by the sleeved fixing screw 42; the upper wall of the inner die seat 43 is provided with a die groove, and the inner lower wall of the die groove is provided with a spray hole 10 corresponding to the first lifting hole 74; one end of the liquid guide pipe 44 is fixedly connected to the transfusion hole 75, and the other end of the liquid guide pipe 44 is connected to the three-way electromagnetic valve 3; the inner die seat 43 is carried by the main die base 41, and is fixed by the fixing screw 42, and then is formed by the inner die seat 43 with the die groove, and the heating port 71 of the main die base 41 can also be heated in cooperation with the existing equipment.

[0024] More specifically, when different specifications or shapes of aluminum alloy die castings need to be produced, the fixing screws 42 on the left and right side walls of the main die base 41 are loosened, the inner die seat 43 is taken out of the inlay port 73, a new inner die seat 43 with a corresponding die groove is replaced, and the die is replaced by re-fixing the fixing screw 42, without disassembling the main die base 41, which is convenient to operate and greatly shortens the die changing time; In the die casting process, the external heating equipment preheats the main die base 41 and the inner die seat 43 through the heating port 71 to ensure the stability of the die groove temperature; after the aluminum alloy molten liquid is injected into the die groove of the inner die seat 43, it is formed under the action of external pressure; at this time, the top end of the ram 543 in the first lifting hole 74 is flush with the lower wall of the die groove, without affecting the forming space; In the demolding stage, the liquid delivered by the liquid guide pipe 44 enters the first lifting hole 74 through the transfusion hole 75, and is sprayed out of the spray hole 10 under the pushing of the ram 543, realizing flexible demolding of the formed workpiece; at the same time, the liquid remaining in the die groove can be used as a pretreatment of the demolding agent for the next die casting, reducing the additional spraying step; The die body structure 4 realizes the integration of functions such as rapid die replacement, temperature control and liquid delivery, which not only improves the adaptability of the equipment to different workpieces, but also provides a basic guarantee for high-quality die casting and efficient demolding.

[0025] As a further scheme of the present application, the demolding structure 5 comprises a driving frame 51, a machine box 52, a motor 53 and a demolding unit 54; the driving frame 51 is convex, and the bottom of the driving frame 51 is a rectangular frame structure, a second lifting hole 81 corresponding to the first lifting hole 74 is formed through the upper wall of the driving frame 51, a lifting groove 82 is formed in the middle of the upper wall of the driving frame 51, the driving frame 51 is detachably arranged on the lower wall of the main mold bottom 41, the bottom of the driving frame 51 is located in the communication port 61 of the base 1, and the top end of the driving frame 51 is inserted into the middle of the heating port 71 of the main mold bottom 41, the second lifting hole 81 of the driving frame 51 is in sealed butt joint with the first lifting hole 74, the machine box 52 is fixedly arranged on the front side wall of the driving frame 51 close to the right end, the motor 53 is fixedly arranged in the machine box 52, and the driving end of the motor 53 is opposite to the driving frame 51, and the demolding unit 54 is movably arranged in the bottom end of the driving frame 51; through the motor 53 in the machine box 52, the demolding unit 54 is started to accumulate force, which assists the demolding of the formed product, and the driving frame 51 is used for bearing and limiting the demolding unit 54.

[0026] More specifically, the demolding structure 5 realizes the cooperation of heating and demolding through the precise butt joint of the driving frame 51 and the main mold bottom 41; the mechanical energy storage mechanism driven by the motor 53 cooperates with the liquid flexible demolding, which not only ensures the controllable demolding strength, but also avoids the damage of rigid contact to the workpiece; at the same time, the detachable driving frame 51 design is convenient for later maintenance and part replacement, which significantly improves the practicality and reliability of the device.

[0027] As a further scheme of the present application, the demolding unit 54 comprises a pair of springs 541, a support plate 542, a plurality of punch rods 543, a rack 544, an axle 545, a wheel body 546, and a plurality of teeth 547; the pair of springs 541 are symmetrically arranged on the inner lower wall of the bottom end of the driving frame 51 and correspond to the front and rear ends, the support plate 542 is fixedly arranged on the other end of the springs 541 and located between the springs 541, the plurality of punch rods 543 are fixedly arranged on the upper wall of the support plate 542 and movably penetrate through the second lifting hole 81 and the first lifting hole 74 at the other end, the other end of the punch rod 543 is inserted into the injection hole 10 of the inner mold base 43, and the punch rod 543 is matched with the lower wall of the mold groove, the rack 544 is fixedly arranged on the right middle wall of the support plate 542 and movably inserted into the lifting groove 82, the axle 545 movably penetrates through the front and rear side walls of the driving frame 51 at both ends and is located to the right of the rack 544, one end of the axle 545 is located in the case 52 and connected with the driving end of the motor 53, the wheel body 546 is fixedly sleeved on the axle 545 and corresponds to the rack 544, the wheel body 546 is cylindrical and a plurality of docking grooves 9 are equidistantly arranged on the side wall and arranged along the clockwise direction, the plurality of teeth 547 are detachably arranged in the docking grooves 9 of the wheel body 546 and fixedly connected through bolts, and the teeth 547 are engaged with the rack 544; the motor 53 drives the axle 545 to rotate the wheel body 546, the teeth 547 on the wheel body 546 are engaged with the rack 544 to drive the rack 544 to descend, the number of the teeth 547 changes the descending height of the rack 544, thereby changing the force storage of the support plate 542 compressing the springs 541, the half-tooth gear structure is formed by the cooperation of the teeth 547 and the wheel body 546, when all the teeth 547 are separated from the rack 544 with the rotation of the wheel body 546, the support plate 542 loses the limit and is driven by the reverse force of the springs 541 to quickly rise and reset, when the workpiece is not separated from the inner mold base 43 after the extrusion molding, the mold groove of the inner mold base 43 is blocked, the descending of the punch rod 543 generates suction force to automatically suck the demolding liquid, and the reverse rebound force is used to realize the flexible force through the liquid contact to promote the molded workpiece to be lifted and demolded, and with the rising of the workpiece, the liquid is scattered and remains in the inner mold base 43.

[0028] More specifically, the design of the half-tooth gear structure and the energy storage of the springs 541 realizes the quick impact action of the punch rods 543, cooperates with the automatic extraction of the demolding liquid, guarantees the demolding efficiency, avoids the damage of the castings through the liquid flexible contact, the detachable design of the teeth 547 adjusts the demolding strength to adapt to different workpiece requirements, the residual pretreatment function of the demolding liquid further improves the continuous production efficiency, the overall structure is simple, reliable and easy to maintain.

[0029] As a further scheme of the present application, in order to realize the compression of the spring 541 after the descent of the support plate 542, the gear 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 energy, and to rebound from the rack 544 by using the spring 541. The number of the gear teeth 547 is different, so that the descent height of the rack 544 and the support plate 542 is different, and the stored energy is different. The actual requirement is set according to the actual requirement.

[0030] As a further scheme of the present application, when the force acting on the punch rod 543 is located in the first lifting hole 74 and the second lifting hole 81 and descends, if the molded workpiece is in the inner mold base 43, the liquid will be automatically extracted through the infusion hole 75 and the liquid guide pipe 44. The first lifting hole 74 above the punch rod 543 and the injection hole 10 are automatically extracted by using the negative pressure principle. The liquid in the injection hole 10 is pushed by the rapid rising of the punch rod 543 to apply force to the molded workpiece to demold, realizing the flexible force of the liquid contact, preventing the deformation or damage of the aluminum alloy.

[0031] More specifically, after the workpiece is molded in the mold structure 4, the motor 53 in the case 52 is started, and the motor driving end drives the wheel shaft 545 and the wheel body 546 to rotate. The gear teeth 547 on the wheel body 546 are engaged with the rack 544, which drives the rack 544 to move downward along the lifting groove 82 of the driving frame 51, and then drives the support plate 542 to compress the spring 541 at the bottom, completing the mechanical energy storage. In this process, the rectangular frame structure of the driving frame 51 provides stable support for the support plate 542 and the spring 541, ensuring that there is no deviation of each component during the energy storage process. Sealing and liquid cooperation: the second lifting hole 81 of the driving frame 51 and the first lifting hole 74 of the main mold base 41 are sealed and connected, forming a closed liquid channel. When the punch rod 543 descends with the support plate 542, negative pressure is generated in the hole, and the demolding liquid is automatically extracted through the liquid guide pipe 44 and the liquid infusion hole 75, reserving liquid medium for subsequent demolding.

[0032] Flexible demolding execution: when the wheel body 546 rotates to the point where the gear teeth 547 are disengaged from the rack 544, the spring 541 releases the stored energy and drives the support plate 542 and the punch rod 543 to rise rapidly. The punch rod 543 moves at high speed in the second lifting hole 81 and the first lifting hole 74, and the demolding liquid in the hole is sprayed out of the injection hole 10 of the inner mold base 43. The liquid impacts the bottom of the workpiece in a flexible contact manner, and the demolding is completed in cooperation with the jacking force of the punch rod 543, avoiding the deformation or scratching of the workpiece caused by rigid contact. The mold structure 5 realizes the flexible demolding mechanism of mechanical energy storage and liquid cooperation, and through the precise assembly of the driving frame 51 and the protection design of the case 52, the stability and safety of the equipment operation are ensured, providing a reliable guarantee for high-quality die casting production.

[0033] Its detailed connection means, for the art is well known technology, the following mainly introduces the working principle and process, the specific work as follows.

[0034] The inner mold base 43 with the target workpiece mold groove is embedded in the inner embedding port 73 of the main mold base 41, and the inner mold base 43 is limited by rotating the fixing screw rod 42 on both sides of the main mold base 41, to ensure that the injection hole 10 of the inner mold base 43 is accurately aligned with the first lifting hole 74 of the main mold base 41. The main mold base 41 is fixed to the left end support of the base 1 by bolts, and the demolding structure 5 is installed by using the communication 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 end of the drive frame 51 penetrates the first installation port 72 of the lower wall of the main mold base 41, so that the second lifting hole 81 is sealed and connected with the first lifting hole 74, and the top end of the punch rod 543 is inserted into the injection hole 10 of the inner mold base 43 and is flush with the lower wall of the mold groove. Secondly, the demolding liquid is stored in the liquid cavity of the base 1 through the injection port 62, and the liquid pump 2 and the three-way electromagnetic valve 3 are in a standby state; the external heating equipment heats the mold body structure 4 through the heating port 71 of the main mold base 41, and the heating area is isolated from the demolding unit 54; When pressure casting, aluminum alloy molten liquid is injected into the mold groove, or aluminum alloy block is put in, and extrusion forming is used by external pressure device, at this time the top end of the punch rod 543 is flush with the lower wall of the mold groove, which does not affect the forming space, and the mold groove ensures uniform solidification of the molten liquid under the action of preheating.

[0035] After forming, mechanical energy storage and liquid extraction: start the motor 53 in the machine box 52, the motor 53 drives the wheel shaft 545 to rotate, the gear teeth 547 on the wheel body 546 are engaged with the rack 544, the rack 544 is pushed to move downward along the lifting groove 82 of the drive frame 51, and then the supporting plate 542 compresses the bottom spring 541 (energy storage is completed); when the supporting plate 542 descends, the punch rod 543 synchronously moves downward from the injection hole 10, the first lifting hole 74 and the second lifting hole 81, so that the volume of the closed space formed by the injection hole 10 and the first lifting hole 74 increases, negative pressure is generated, and the demolding liquid is automatically extracted from the liquid cavity to the hole through the infusion hole 75 and the liquid guide pipe 44, at this time the three-way electromagnetic valve 3 needs to control the liquid guide pipe 44 to be communicated with the liquid cavity, and the liquid pump 2 connection end is closed; the height of the wheel shaft 545 driving the rack 544 to descend is associated with the number of gear teeth 547 installed on the wheel body 546 by using the butt joint groove 9, the more the number of gear teeth 547, the greater the descending height of the rack 544.

[0036] Flexible impact demolding: when the wheel body 546 continues to rotate until the teeth 547 are completely separated from the rack 544, the support plate 542 loses constraint, the spring 541 instantaneously releases elastic force to drive the support plate 542 to quickly rise, and the impact rod 543 synchronously impacts upward to push the demolding liquid in the hole to be sprayed out of the spray hole 10; the liquid first makes flexible contact with the bottom of the casting and applies upward thrust, cooperates with the jacking force of the impact rod 543 to push the casting out of the mold groove, avoids scratches or deformation caused by rigid contact, simultaneously uses the shielding of the workpiece, and scatters the demolding liquid impacted to be located in the mold groove of the inner mold base 43, which can be used next time, provides pre-lubrication for the next die casting, and reduces the subsequent spraying step.

[0037] Diversified cooperative operation (extended use mode): if the device adopts an upper and lower symmetrical mold design, the liquid pump 2 can be started to cooperate with the three-way electromagnetic valve 3 to control the liquid guide pipe 44 of the upper and lower mold body structure 4 to synchronously spray demolding liquid; or the liquid pump 2 provides additional power to realize relative spraying of demolding liquid or cooling liquid between the upper and lower molds, improves the adaptability of the device; or the liquid pump 2 provides power to use liquid impact workpiece demolding.

[0038] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A die-casting device for aluminum alloy die-casting parts of machine tools, characterized in that: The invention comprises a base (1), a liquid pump (2), a three-way solenoid valve (3), a mold body structure (4) and a demoulding structure (5); a communication port (61) penetrating the upper wall is provided at the middle of the left end of the base (1); a liquid cavity is provided at the right end of the base (1); and an injection port (62) communicating with the liquid cavity is provided on the upper wall of the right end of the base (1); the liquid pump (2) is fixedly arranged in the communication port (61) of the base (1) and close to the rear end; the liquid inlet end of the liquid pump (2) is connected to the rear end of the liquid cavity through a pipeline. The three-way solenoid valve (3) is fixedly arranged on the left side of the liquid pump (2), one end of the three-way solenoid valve (3) is connected to the rear wall of the liquid cavity through a pipeline, and one end of the three-way solenoid valve (3) is connected to the liquid outlet end of the liquid pump (2) through a pipeline. The mold body structure (4) is detachably arranged on the left end of the base (1) and corresponds to the communication port (61). The demoulding structure (5) is fixedly arranged below the mold body structure (4), and the demoulding structure (5) is located in the communication port (61) of the base (1); The base (1) provides support height and stores demoulding liquid or cooling liquid, the liquid pump (2) and the electromagnetic valve provide a method for supplying demoulding liquid, the mold body structure (4) is used for extrusion molding and is convenient for replacing the mold groove, and the demoulding structure (5) is used to assist in demoulding after molding and spray demoulding liquid or cooling liquid at the same time.

2. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 1, characterized in that: The mold body structure (4) includes a main mold bottom (41), a fixed screw (42), an inner mold base (43) and a liquid guide tube (44); The main mold bottom (41) is convex, and the main mold bottom (41) can be detachably placed 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) are provided with a through heating port (71), and the middle of the lower wall of the heating port (71) is provided with a first mounting port (72) corresponding to the connecting port (61). The middle of the upper wall of the main mold bottom (41) is provided with an embedded port (73), and the lower part of the embedded port (73) is provided with a first mounting port (72) corresponding to the connecting port (61). A plurality of first lifting holes (74) are equidistantly provided on the wall near the four corners. An infusion hole (75) is provided in the middle of the right side wall of the main mold bottom (41), and the infusion holes (75) are respectively connected in series with the first lifting holes (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 embedding opening (73). The inner mold base (43) is detachably embedded in the inner embedding opening (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 electromagnetic valve (3).

3. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 2, characterized in that: 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 on the lower wall of the mold groove.

4. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 3, characterized in that: The demoulding structure (5) includes a driving frame (51), a chassis (52), a motor (53) and a demoulding unit (54); The driving frame (51) is convex, and the bottom of the driving frame (51) is a rectangular frame structure. The upper wall of the driving frame (51) is penetrated by a second lifting hole (81) corresponding to the first lifting hole (74). The middle part of the upper wall of the driving frame (51) is provided with a lifting groove (82). The driving frame (51) is detachably placed on the lower wall of the main mold bottom (41). The bottom of the driving frame (51) is located in the connecting port (61) of the base (1), and the top of the driving frame (51) is inserted into the middle part of the heating port (71) of the main mold bottom (41). The chassis (52) is fixedly arranged on the front side wall of the driving frame (51) and close to the right end. The motor (53) is fixedly arranged in the chassis (52), and the driving end of the motor (53) is opposite to the driving frame (51). The demoulding unit (54) is movably arranged in the bottom end of the driving frame (51).

5. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 4, characterized in that: The second lifting hole (81) of the driving frame (51) is sealed and docked with the first lifting hole (74).

6. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 5, characterized in that: The demoulding unit (54) includes a pair of springs (541), a supporting plate (542), a plurality of punches (543), a rack (544), a wheel axle (545), a wheel body (546), and a plurality of teeth (547); A pair of springs (541) are symmetrically arranged on the inner lower wall of the bottom end of the driving frame (51), and are located at the front and rear ends corresponding to each other. The two ends of the support plate (542) are fixedly arranged on the other end of the spring (541), and the support plate (542) is located between the springs (541). Several punch rods (543) are fixedly arranged on the upper wall of the support plate (542), and the other ends of the punch rods (543) are movable through the second lifting hole (81) and the first lifting hole (74). The other ends of several punch rods (543) are respectively inserted into the spray hole (10) of the inner mold base (43), and the punch rods (543) are matched 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), the two ends of the wheel shaft (545) are movable through the front and rear side walls of the driving frame (51), and the wheel shaft (545) is located on the right side of the rack (544), one end of the wheel shaft (545) is located in the chassis (52) and is connected to the driving end of the motor (53), the wheel body (546) is fixedly mounted on the wheel shaft (545), and the wheel body (546) corresponds to the rack (544), the wheel body (546) is cylindrical, and the side wall of the wheel body (546) is equidistantly provided with a plurality of docking grooves (9), and arranged equidistantly in a clockwise direction, and a plurality of the teeth (547) are detachably placed at the docking grooves (9) of the wheel body (546), and the teeth (547) are fixed by bolts, and the teeth (547) are engaged with the rack (544).

7. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 6, characterized in that: The support plate (542) descends, compresses the spring (541), and after accumulating force, drives the punch rod (543) to impact upward, and the teeth (547) and the wheel body (546) are assembled to form a semi-gear structure.

8. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 7, characterized in that: Different numbers of the teeth (547) drive the rack (544) and the support plate (542) to descend to different heights, thereby resulting in different amounts of stored force.

9. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 8, characterized in that: When the punch rod (543) is forced to descend in the first lifting hole (74) and the second lifting hole (81), if there is a formed workpiece in the inner mold base (43), liquid will be automatically extracted through the infusion hole (75) and the liquid guide tube (44).

10. The die-casting device for aluminum alloy die-casting parts for machine tools according to claim 9, characterized in that: The liquid in the spray hole (10) is pushed up quickly by the punch rod (543) to apply force to the molded workpiece for demoulding.

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