Step die-casting machining die and using method

Abstract

The invention discloses a step die-casting machining die and a using method, and relates to the technical field of die-casting machining. The die-casting machine comprises a die-casting machine body, a step machining mold is stably installed on the die-casting machine body through a high-precision hydraulic clamping device, an air injection demolding assembly used for assisting demolding is integrated in the step machining mold, and a lifting mechanism is carried at the top end of the die-casting machine body through a fixing support; the driving end of the lifting mechanism is connected with a surface spraying assembly, and an inner side spraying assembly used for evenly spraying special parts of the step triangular support is arranged in the surface spraying assembly. By arranging the inner side spraying assembly, refined spraying of a release agent can be accurately achieved along the track of a special part of a complex structure such as a stair triangular support, meanwhile, the flow speed of the release agent is increased through the necking design of a connecting pipe, and by matching with the rotary spraying function of an atomizing nozzle, the spraying efficiency is improved. The problem that special parts are difficult to touch in traditional spraying is effectively solved, and the spraying uniformity of the release agent is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting processing, and specifically to a stepped die-casting processing mold and a usage method thereof. Background Art

[0002] Escalator steps are components for passengers to stand on the escalator. They are a kind of four-wheel trolley with a special structural form. The main wheel axles of each step are loosely sleeved with step chains, which can keep the steps horizontal on the upper branch and flip on the lower branch. Currently, the existing escalator step structures are generally divided into two types: integral type and assembled type. At present, integral steps generally use aluminum alloy materials and are manufactured by means of a one-time die-casting forming process with a die-casting machine. During die-casting, it is necessary to spray die-casting release agent in the moving die and fixed die cavities to avoid direct contact between the molten metal and the mold, reduce the phenomenon of sticking to the mold, and make it easy for the casting to be demolded. Due to the special structure of the escalator step, there is a triangular bracket connection structure between the tread and the riser. The triangular bracket connection structure will block the spraying of the release agent. The conventional nozzle arrangement results in uneven spraying, leading to insufficient adhesion of the release agent in these parts and prone to sticking to the mold during die-casting. Secondly, usually, two methods of push rods and push plates are used for demolding. During die-casting, the liquid metal fills the mold cavity under high pressure. When the molten metal cools and solidifies, it closely adheres to the mold surface. At this time, the air between the mold cavity and the die-casting part is discharged, forming a relatively vacuum state. When the mold is opened, due to the action of atmospheric pressure, the contact part between the die-casting part and the mold will be affected by the vacuum adsorption force, making it difficult for the die-casting part to be removed from the mold, and further resulting in problems such as deformation, scratching, and even damage of the die-casting part during the demolding process. In view of the above problems, the inventor proposes a stepped die-casting processing mold and a usage method to solve the above problems. Summary of the Invention

[0003] In order to solve the problems of uniformly spraying the release liquid at the connection structure of the step triangular bracket and assisting in demolding the stepped die-casting after die-casting; the purpose of the present invention is to provide a stepped die-casting processing mold and a usage method thereof.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: A stepped die-casting processing mold includes a die-casting machine body. The die-casting machine body stably installs a step processing mold through a high-precision hydraulic clamping device. The step processing mold internally integrates a jet demolding component used for assisting demolding. The top of the die-casting machine body is equipped with a lifting mechanism through a fixed bracket. The driving end of the lifting mechanism is connected to a surface spraying component used for spraying the release agent on the inner wall of the cavity of the step processing mold. The surface spraying component is provided with an inner spraying component used for uniformly spraying special parts of the step triangular bracket.

[0005] Preferably, the jet demoulding assembly includes a push rod. An air guide groove for gas transmission is formed inside the push rod. Eight exhaust grooves for assisting in stepped demoulding are formed at the end of the push rod and are distributed in an annular array. The exhaust grooves are connected to the air guide groove in a through manner. A push groove corresponding to the push rod is formed in the middle of the moving template. The push rod slides in the push groove. A baffle is fixedly sleeved on the outer wall of the push rod, and the baffle slides at the end of the push groove. A limiting plate is fixedly installed at the push groove of the inner wall of the moving template through bolts. The push rod penetrates through the limiting plate. An air inlet pipe is connected to the air inlet of the push rod in a through manner, and the air inlet pipe is connected to the driving end of an external air source.

[0006] Preferably, the inner spraying assembly includes two symmetrically distributed sliders. The two sliders slide flexibly on both sides of the surface spraying assembly respectively. Liquid inlet frames are fixedly connected to the outer sides of the two sliders. A rotating liquid guide frame is rotatably arranged inside the liquid inlet frame. A connecting pipe is vertically communicated with the end of the rotating liquid guide frame. The diameter of the connecting pipe narrows in the middle part and is in a necking shape. A driving shaft is rotatably installed on the inner wall of the connecting pipe through a shaft seat. A rotating frame is fixedly arranged at the bottom end of the driving shaft. The rotating frame is rotatably and hermetically connected to the connecting pipe. Six fan blades are fixedly arranged on the outer wall of the driving shaft at the necking part of the connecting pipe and are distributed in an annular array. A side plate is fixedly arranged between the two sliders on one side close to the first spraying frame. A turning frame is rotatably arranged on the side plate, and the two ends of the turning frame are respectively sleeved on the outer walls of the corresponding connecting pipes. An electric cylinder is rotatably arranged in the middle of the inner wall of the side plate, and the driving end of the electric cylinder is rotatably connected to the turning frame. A lifting frame is slidably installed on the inner wall of the spraying frame through a slide rail. A motor is fixedly arranged in the middle of one side of the top end of the spraying frame, and the driving end of the motor is fixedly connected with a lead screw. A nut is threadedly sleeved on the outer wall of the lead screw, and the nut is fixedly installed on the lifting frame. Guide plates are fixedly connected to both sides of the spraying frame. Two symmetrically distributed guide bolts are fixedly arranged on the inner sides of the two sliders. Two sliding grooves corresponding to the stepped connecting rod are formed on the guide plates. Horizontal grooves are formed on both sides of the lifting frame, and the guide bolts slide in the corresponding sliding grooves and horizontal grooves.

[0007] Preferably, the stepped processing die includes a moving template, a fixed template and two symmetrically distributed side templates. The moving template and the fixed template are respectively fixedly installed in the die-casting machine body. The two side templates are respectively slidably installed on both sides of the moving template. A push plate is slidably arranged inside the moving template. A sliding trapezoidal block is slidably arranged in the middle of the push plate. A guide rod which is obliquely upwardly arranged and is matched with the sliding trapezoidal block is fixedly arranged on the inner wall of the moving template. A return spring is sleeved on the outer wall of the push rod, and the two ends of the return spring are respectively connected to the baffle and the inner wall of the push groove in the moving template. Guide columns penetrate through the four corners of the push plate, and the four guide columns are fixedly connected to the inner wall of the moving template.

[0008] Preferably, the surface spraying assembly includes a spraying frame and a connecting frame. The spraying frame is fixedly connected to the driving end of the lifting mechanism through the connecting frame. A first spraying rack is fixedly installed on one side of the spraying frame close to the moving template, and a second spraying rack is fixedly installed on one side of the spraying frame close to the fixed template. A plurality of atomizing nozzles are fixedly assembled on the outer sides of the spraying frame and the connecting frame. A number of atomizing nozzles are orderly connected through pipelines and aggregated and connected to an external demolding agent input pipeline. On the two rotating frames, two atomizing nozzles are symmetrically installed on each. The two liquid inlet frames are connected to the pipelines connecting numerous atomizing nozzles through pipelines.

[0009] A method used for a stepped die-casting processing mold includes the following steps: S1. Place the prefabricated aluminum alloy blank in a furnace and heat it at a high temperature through an accurate temperature control system to completely melt the blank into a liquid state; S2. Drive the surface spraying assembly to descend to the middle position between the moving template and the fixed template through the lifting mechanism. Then, through the coordinated operation of the spraying assembly and the inner spraying assembly, the former comprehensively sprays the inner wall of the mold cavity, and the latter performs fine spraying on special parts such as stepped triangular brackets to ensure that the demolding agent is evenly covered. After spraying, reset the spraying assembly and the inner spraying assembly through the lifting mechanism to avoid interfering with subsequent die-casting processes; S3. The die-casting machine body drives the moving template, the fixed template and the side template to close to form a closed mold cavity. Scoop an appropriate amount of liquid aluminum alloy from the furnace and pour it into the gate in the die-casting machine body. The injection mechanism inside the die-casting machine body injects the aluminum liquid into the mold cavity quickly at a set high speed and high pressure and maintains a certain pressure until the aluminum liquid is completely cooled and solidified. After the pressure holding is over, the die-casting machine body controls the template to open to complete the mold opening operation; S4. After mold opening, the air jet demolding assembly is started. After the formed step is ejected from the mold through the air jet demolding assembly, accurately grab the demolded step through an external transfer robotic arm and transfer it to a designated station to complete the entire die-casting production process.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting the inner spraying assembly, the present invention can accurately spray the demolding agent finely along the trajectories of special parts of complex structures such as stepped triangular brackets. At the same time, the necking design of the connecting pipe is used to increase the flow rate of the demolding agent, and the rotating spraying function of the atomizing nozzle is cooperated to effectively solve the problem that it is difficult for traditional spraying to reach special parts, and significantly improve the spraying uniformity of the demolding agent; 2. The present invention constructs an efficient demoulding system by setting up a stepped processing die and a jet demoulding component. The ejector rod in the die-casting machine body drives the stepped processing die to move, driving the push rod to push out the die-cast stepped part. During this process, an external air source continuously delivers gas to the air guide groove inside the push rod. With the help of the conical structure design of the push rod end face, when the push rod separates from the push groove, the gas jets out at high speed from the exhaust grooves distributed in an annular array. The high-speed air flow can effectively break the vacuum adsorption state between the casting and the die, and can also form an air film buffer layer, significantly reducing the demoulding resistance, avoiding the deformation or damage of the casting that may be caused by traditional mechanical demoulding, achieving an efficient and non-destructive demoulding effect, and greatly improving the production efficiency and product qualification rate. 3. The present invention sets up a surface spraying component. Through the spraying system constructed by several atomizing nozzles in the surface spraying component, the several atomizing nozzle components cooperate to operate, and can comprehensively and evenly spray the inner wall of the cavity of the stepped processing die, effectively reducing the friction between the casting and the inner wall of the die, making it easier for the stepped casting to be demoulded from the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the stepped processing die and the stepped part in the present invention; Figure 3 It is a schematic diagram of the side sectional structure of the stepped processing die after closing in the present invention; Figure 4 It is an exploded structure schematic diagram of the stepped processing die in the present invention; Figure 5 It is an exploded structure schematic diagram of the surface spraying component in the present invention; Figure 6 It is a schematic diagram of the structure of the inner spraying component in the present invention; Figure 7 It is a partial structure schematic diagram of the inner spraying component in the present invention; Figure 8 It is a schematic diagram of the overall connection structure of the atomizing nozzles in the present invention; Figure 9 It is Figure 3 a schematic diagram of the enlarged structure at A in Figure 10 It is Figure 4Schematic enlarged view of the structure at B in [the figure]; Figure 11 is Figure 6 Schematic enlarged view of the structure at C in [the figure]; Figure 12 is Figure 6 Schematic enlarged view of the structure at D in [the figure].

[0013] In the figure: 1, die-casting machine body; 2, step processing die; 201, moving template; 202, fixed template; 203, side template; 204, return spring; 205, push plate; 206, sliding trapezoidal block; 207, guide rod; 208, guide pillar; 3, jet demolding assembly; 301, push rod; 302, air guide groove; 303, exhaust groove; 304, baffle; 305, limit plate; 306, air inlet pipe; 4, lifting mechanism; 5, surface spraying assembly; 501, spraying frame; 502, connecting frame; 503, first spraying rack; 504, second spraying rack; 6, inner spraying assembly; 601, slider; 602, liquid inlet frame; 603, rotating liquid guide frame; 604, connecting pipe; 605, drive shaft; 606, fan blade; 607, rotating frame; 608, atomizing nozzle; 609, side plate; 610, flipping frame; 611, electric cylinder; 612, guide bolt; 613, guide plate; 614, lifting frame; 615, lead screw; 616, nut; 617, motor. Detailed implementation manners

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] Embodiment: As Figure 1-12 shown, the present invention provides a technical solution: a step die-casting processing die, including a die-casting machine body 1, the die-casting machine body 1 is stably installed with a step processing die 2 through a high-precision hydraulic clamping device, the step processing die 2 is internally integrated with a jet demolding assembly 3 used for assisting demolding, the top end of the die-casting machine body 1 is carried with a lifting mechanism 4 through a fixed bracket, the driving end of the lifting mechanism 4 is connected with a surface spraying assembly 5 used for spraying a demolding agent on the inner wall of the cavity of the step processing die 2, and an inner spraying assembly 6 used for uniformly spraying special parts of the step triangular bracket is arranged in the surface spraying assembly 5; The jet demolding assembly 3 includes a push rod 301, an air guide groove 302 for gas transmission is opened inside the push rod 301, eight annularly arrayed exhaust grooves 303 for assisting step demolding are opened at the end of the push rod 301, and the exhaust grooves 303 are communicated with the air guide groove 302; The inner spraying assembly 6 includes two symmetrically distributed sliders 601. The two sliders 601 can slide flexibly on both sides of the surface spraying assembly 5. Liquid inlet frames 602 are fixedly connected to the outer sides of the two sliders 601. A rotating liquid guiding frame 603 is rotatably arranged inside the liquid inlet frame 602. A connecting pipe 604 is vertically connected to the end of the rotating liquid guiding frame 603. The diameter of the connecting pipe 604 narrows in the middle part, presenting a necking shape. A driving shaft 605 is rotatably installed on the inner wall of the connecting pipe 604 through a shaft seat. A rotating frame 607 is fixedly arranged at the bottom end of the driving shaft 605. The rotating frame 607 is rotatably and sealingly connected to the connecting pipe 604. Six fan blades 606 distributed in an annular array are fixedly arranged on the outer wall of the driving shaft 605 at the necking part of the connecting pipe 604.

[0016] By adopting the above technical solution, the mold cavities of special parts such as the step triangular brackets can be finely sprayed to ensure that the release agent is evenly covered, while reducing the demolding resistance and providing high demolding efficiency.

[0017] The step processing mold 2 includes a moving template 201, a fixed template 202 and two symmetrically distributed side templates 203. The moving template 201 and the fixed template 202 are respectively fixedly installed in the die-casting machine body 1. The two side templates 203 are respectively slidably installed on both sides of the moving template 201. A push plate 205 is slidably arranged inside the moving template 201. A sliding trapezoidal block 206 is slidably arranged in the middle of the push plate 205. Guide rods 207 which are inclined upward and are used in cooperation with the sliding trapezoidal block 206 are fixedly arranged on the inner wall of the moving template 201.

[0018] By adopting the above technical solution, during the process of the ejector rod pushing the push plate 205 to move, the sliding trapezoidal block 206 moves up and down along the guiding of the guide rod 207.

[0019] A push groove corresponding to the push rod 301 is formed in the middle of the moving template 201, and the push rod 301 slides in the push groove. A baffle 304 is fixedly sleeved on the outer wall of the push rod 301, and the baffle 304 slides at the end of the push groove. A limiting plate 305 is fixedly installed at the push groove of the inner wall of the moving template 201 through bolts, and the push rod 301 penetrates through the limiting plate 305. An air inlet pipe 306 is connected to the air inlet of the push rod 301 in a through manner, and the air inlet pipe 306 is connected to the driving end of an external air source.

[0020] By adopting the above technical solution, the baffle 304 is limited by the limiting plate 305, thereby restricting the moving distance of the push rod 301.

[0021] The surface spraying assembly 5 includes a spraying frame 501 and a connecting frame 502. The spraying frame 501 is fixedly connected to the driving end of the lifting mechanism 4 through the connecting frame 502. A first spraying rack 503 is fixedly installed on one side of the spraying frame 501 close to the moving template 201, and a second spraying rack 504 is fixedly installed on one side of the spraying frame 501 close to the fixed template 202.

[0022] By adopting the above technical solution, the lifting mechanism 4 drives the spraying frame 501 to move up and down through the connecting frame 502.

[0023] A side plate 609 is fixedly provided between the two sliders 601 on the side close to the first spraying rack 503. A flipping frame 610 is rotatably provided on the side plate 609, and both ends of the flipping frame 610 are respectively sleeved on the outer wall of the corresponding connecting pipe 604. An electric cylinder 611 is rotatably provided in the middle of the inner wall of the side plate 609, and the driving end of the electric cylinder 611 is rotatably connected to the flipping frame 610.

[0024] By adopting the above technical solution, the driving end of the electric cylinder 611 pushes the flipping frame 610 to flip on the side plate 609.

[0025] A lifting frame 614 is slidably installed on the inner wall of the spraying frame 501 through a slide rail. A motor 617 is fixedly provided in the middle of one side of the top end of the spraying frame 501, and the driving end of the motor 617 is fixedly connected to a lead screw 615. A nut 616 is threadedly sleeved on the outer wall of the lead screw 615, and the nut 616 is fixedly installed on the lifting frame 614.

[0026] By adopting the above technical solution, the lifting frame 614 moves up and down under the guidance of the slide rail.

[0027] Guide plates 613 are fixedly connected to both sides of the spraying frame 501. Two symmetrically distributed guide bolts 612 are fixedly provided on the inner sides of the two sliders 601. Two chutes corresponding to the step connecting rods are opened on the guide plates 613. Horizontal grooves are opened on both sides of the lifting frame 614, and the guide bolts 612 slide in the corresponding chutes and horizontal grooves.

[0028] By adopting the above technical solution, the sliders 601 move under the guidance of the guide plates 613, the lifting frame 614 and the guide bolts 612.

[0029] A plurality of atomizing nozzles 608 are fixedly assembled on the outer sides of the spraying frame 501 and the connecting frame 502. A number of atomizing nozzles 608 are sequentially connected through pipes and aggregated and connected to an external release agent input pipe; On the two rotating frames 607, two atomizing nozzles 608 are symmetrically installed on each. The two liquid inlet frames 602 are connected to the pipes connecting the numerous atomizing nozzles 608 through pipes.

[0030] By adopting the above technical solution, the atomizing nozzle 608 is connected to the external demolding agent input pipeline through a pipeline, and the liquid inlet frame 602 is also connected to the nozzle pipeline, forming a complete demolding agent conveying system.

[0031] A return spring 204 is sleeved on the outer wall of the push rod 301, and both ends of the return spring 204 are respectively connected to the baffle 304 and the inner wall of the push groove in the moving template 201. Guide posts 208 are slidably penetrated through the four corners of the push plate 205, and the four guide posts 208 are fixedly connected to the inner wall of the moving template 201.

[0032] By adopting the above technical solution, the push plate 205 is moved under the guidance of the guide posts 208.

[0033] A method used for a stepped die-casting processing mold includes the following steps: S1. Place the prefabricated aluminum alloy blank in a furnace and heat it at a high temperature through an accurate temperature control system to completely melt the blank into a liquid state; S2. Drive the surface spraying assembly 5 to descend to the middle position between the moving template 201 and the fixed template 202 through the lifting mechanism 4, and then coordinate the operation of the spraying assembly 5 and the inner spraying assembly 6. The former sprays the inner wall of the mold cavity comprehensively, and the latter conducts fine spraying on special parts such as the stepped triangular bracket to ensure that the demolding agent is evenly covered. After spraying is completed, reset the spraying assembly 5 and the inner spraying assembly 6 through the lifting mechanism 4 to avoid interfering with subsequent die-casting processes; S3. The die-casting machine body 1 drives the moving template 201, the fixed template 202 and the side template 203 to close to form a closed mold cavity. Scoop an appropriate amount of liquid aluminum alloy from the furnace and pour it into the gate in the die-casting machine body 1. The injection mechanism inside the die-casting machine body 1 injects the aluminum liquid into the mold cavity quickly at a set high speed and high pressure and maintains a certain pressure until the aluminum liquid is completely cooled and solidified. After the pressure holding is completed, the die-casting machine body 1 controls the template to open to complete the mold opening operation; S4. After mold opening, the air jet demolding assembly 3 is started. After the formed step is ejected from the mold through the air jet demolding assembly 3, the demolded step is accurately grasped by an external transfer robotic arm and transferred to a designated station to complete the entire die-casting production process.

[0034] Working principle: First, drive the spraying frame 501 to descend to the middle position between the moving template 201 and the fixed template 202 through the lifting mechanism 4, as Figure 6 shown. Control the electric cylinder 611 to start. The driving end of the electric cylinder 611 extends to push the flipping frame 610 to flip 90° around the rotation connection with the side plate 609. The flipping frame 610 drives the two connecting pipes 604 and the rotating liquid guide frame 603 to rotate synchronously. After flipping, as Figure 8As shown, the mold release agent enters through an external mold release agent input pipeline and is distributed to each atomizing nozzle 608 through the pipeline system. The atomizing nozzles 608 located on the first spraying rack 503 and the second spraying rack 504 atomize the mold release agent and evenly spray it on the surface of the mold cavity. The mold release agent that enters the cavity of the liquid inlet frame 602 flows into its interior through the circular groove on the rotating liquid guide frame 603 and is then transported to the connecting pipe 604. Due to the necking design in the middle of the connecting pipe 604, the flow rate of the mold release agent increases here. The mold release agent flowing at high speed impacts the fan blade 606, driving the drive shaft 605 to rotate, and then driving the rotating frame 607 and the atomizing nozzles 608 thereon to rotate synchronously, spraying the atomized mold release agent rotationally; Meanwhile, as Figure 7 shown, start the motor 617 to drive the lead screw 615 to rotate forward. The nut 616 is in transmission cooperation with the lead screw 615. Under the precise guidance of the guide rail, drive the lifting frame 614 to achieve stable vertical lifting. When the lifting frame 614 descends to the lowest position, the lead screw 615 immediately rotates in the reverse direction to make the lifting frame 614 complete the rising and reset action. During this process, the lifting frame 614 drives the slider 601 to lift and lower synchronously through the guide bolt 612, and under the synergistic action of the guide plate 613, precisely control the connecting pipe 604 to move along special parts such as the stepped triangular bracket, and combine with the rotational spraying function of the atomizing nozzles 608 on the connecting pipe 604 to achieve the fine spraying operation of the mold release agent on the surface of complex structures; After spraying is completed, the spraying assembly 5 and the inner spraying assembly 6 are reset through the lifting mechanism 4. Then, the die-casting body 1 drives the moving template 201 to move towards the fixed template 202. During this process, the two side templates 203 approach each other under the guidance of the fixed columns until they close, forming a closed mold cavity. Scoop an appropriate amount of liquid aluminum alloy from the melting furnace and pour it into the gate in the die-casting body 1. The injection mechanism inside the die-casting body 1 injects the aluminum liquid into the mold cavity quickly at a set high speed and high pressure and maintains a certain pressure until the aluminum liquid completely cools and solidifies. After the pressure holding is completed, the die-casting body 1 controls the template to open to complete the mold opening operation; After the mold opening is completed, the ejector rods inside the die-casting body 1 start to work, pushing the push plate 205 to slide smoothly along the guide posts 208. During this process, the sliding trapezoidal block 206 moves downward under the guiding constraint of the guide rod 207 and pushes the push rod 301 to move synchronously. In the initial state, the push rod 301 is embedded in the push groove, and its outer wall fits tightly with the inner wall of the push groove, so that the exhaust groove 303 is completely blocked by the inner wall of the push groove and is in a closed state. As the push rod 301 generates displacement under the action of the sliding trapezoidal block 206, the baffle 304 at its end starts to compress the return spring 204. At the same time as the ejector rod starts to work, an external air source is activated, and the external compressed gas is continuously injected into the air guide groove 302 through the air inlet pipe 306. Since the end face of the push rod 301 is designed in a conical shape, after the push rod 301 is separated from the push groove, the gas can be ejected from the exhaust grooves 303 distributed in an annular array at high speed, destroying the vacuum adsorption and thus reducing the adsorption force, making it easier for the die-casting part to be removed from the mold. Finally, the stepped part after demolding is precisely grasped by the external transfer robotic arm and transferred to the designated station to complete the entire die-casting production process, and the die-casting operation is carried out repeatedly in this way.

[0035] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A step die-casting die, comprising a die-casting machine body (1), characterized in that: The die-casting machine body (1) is securely mounted on the step processing die (2) via a high-precision hydraulic clamping device; the step processing die (2) is internally integrated with an air jet demoulding component (3) for assisting demoulding; the top of the die-casting machine body (1) is equipped with a lifting mechanism (4) via a fixed bracket; the driving end of the lifting mechanism (4) is connected to a surface spraying component (5) for spraying a demoulding agent on the inner wall of the die cavity of the step processing die (2); the surface spraying component (5) is provided with an inner side spraying component (6) for uniformly spraying special parts of the step triangular bracket; The jet demoulding assembly (3) comprises a push rod (301), a gas guide groove (302) for gas delivery is provided inside the push rod (301), eight gas exhaust grooves (303) for assisting step demoulding and distributed in a circular array are provided at the end of the push rod (301), and the gas exhaust grooves (303) are connected to the gas guide groove (302); The inner spraying assembly (6) comprises two symmetrically distributed sliders (601), the two sliders (601) are flexibly slidable on both sides of the surface spraying assembly (5), the outer sides of the two sliders (601) are fixedly connected to the liquid inlet frame (602), the inner side of the liquid inlet frame (602) is rotatably provided with a rotating liquid guide frame (603), the end of the rotating liquid guide frame (603) is vertically connected with a connecting pipe (604), the connecting pipe (604) has a narrowed diameter in the middle part, and is in a necked shape, the inner wall of the connecting pipe (604) is rotatably mounted with a driving shaft (605) through a shaft seat, the bottom end of the driving shaft (605) is fixedly provided with a rotating frame (607), the rotating frame (607) and the connecting pipe (604) are rotatably and sealedly connected, and the outer wall of the driving shaft (605) is located at the neck of the connecting pipe (604) and is fixed with six fan blades (606) distributed in a ring array.

2. A step die-casting mold according to claim 1, characterized in that: The step processing die (2) comprises a movable die plate (201), a fixed die plate (202) and two symmetrically distributed side die plates (203); the movable die plate (201) and the fixed die plate (202) are respectively fixedly mounted in the die casting machine body (1); the two side die plates (203) are respectively slidably mounted on both sides of the movable die plate (201); a push plate (205) is slidably provided inside the movable die plate (201); a sliding trapezoidal block (206) is slidably provided in the middle of the push plate (205); a guide rod (207) which cooperates with the sliding trapezoidal block (206) is fixedly provided on the inner wall of the movable die plate (201); the guide rod (207) is arranged to be inclined upward.

3. A step die-casting mold according to claim 2, characterized in that: A push groove corresponding to the push rod (301) is provided in the middle of the movable plate (201), and the push rod (301) slides in the push groove; a baffle (304) is fixedly sleeved on the outer wall of the push rod (301), and the baffle (304) slides at the end of the push groove; a limit plate (305) is fixedly installed at the push groove on the inner wall of the movable plate (201) by bolts, and the push rod (301) passes through the limit plate (305); an air inlet (306) is connected to the air inlet of the push rod (301), and the air inlet (306) is connected to the driving end of the external air source.

4. A step die-casting mold according to claim 1, characterized in that: The surface spraying assembly (5) comprises a spraying frame (501) and a connecting frame (502); the spraying frame (501) is fixedly connected to the driving end of the lifting mechanism (4) via the connecting frame (502); a first spraying frame (503) is fixedly mounted on a side of the spraying frame (501) close to the movable platen (201); and a second spraying frame (504) is fixedly mounted on a side of the spraying frame (501) close to the fixed platen (202).

5. The step die-casting mold according to claim 1, characterized in that: A side plate (609) is fixedly provided between the two sliders (601) on one side close to the first spraying frame (503), a flip frame (610) is rotatably provided on the side plate (609), and two ends of the flip frame (610) are respectively sleeved on the outer wall of the corresponding connecting pipe (604), an electric cylinder (611) is rotatably provided in the middle of the inner wall of the side plate (609), and the driving end of the electric cylinder (611) is rotatably connected to the flip frame (610).

6. A step die-casting mold according to claim 4, characterized in that: The inner wall of the spray frame (501) is slidably mounted with a lifting frame (614) via a slide rail, a motor (617) is fixedly mounted at the middle of one side of the top of the spray frame (501), a screw rod (615) is fixedly connected to the driving end of the motor (617), a nut (616) is threadedly sleeved on the outer wall of the screw rod (615), and the nut (616) is fixedly mounted on the lifting frame (614).

7. A step die-casting mold according to claim 6, characterized in that: Guide plates (613) are fixedly connected to both sides of the spray frame (501), two symmetrically distributed guide bolts (612) are fixedly provided on the inner sides of the two sliders (601), two slide grooves corresponding to the step connecting rods are provided on the guide plates (613), transverse grooves are provided on both sides of the lifting frame (614), and the guide bolts (612) slide in the corresponding slide grooves and transverse grooves.

8. A step die-casting die as claimed in claim 7, characterized in that: The outer sides of the spray frame (501) and the connection frame (502) are both fixedly equipped with a plurality of atomizing nozzles (608), and the plurality of atomizing nozzles (608) are interconnected in order through pipelines and are aggregated and connected to an external release agent input pipeline; Two atomizing nozzles (608) are symmetrically mounted on each of the two rotating frames (607), and the two liquid inlet frames (602) are connected to a pipeline connected to a plurality of atomizing nozzles (608) through a pipeline.

9. The step die-casting mold according to claim 1, characterized in that: The outer wall of the push rod (301) is sleeved with a return spring (204), and the two ends of the return spring (204) are respectively connected to the baffle plate (304) and the inner wall of the push groove in the movable plate (201), and guide pillars (208) are slidably provided through the four corners of the push plate (205), and the four guide pillars (208) are fixedly connected to the inner wall of the movable plate (201).

10. A method for a step die-casting mold according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the prefabricated aluminum alloy blank in a furnace and heat it at high temperature through a precise temperature control system to completely melt the blank into a liquid state; S2, driving the surface spraying assembly (5) to descend to the center position between the movable die plate (201) and the fixed die plate (202) through the lifting mechanism (4), and then coordinating the operation of the spraying assembly (5) and the inner spraying assembly (6), the former spraying the inner wall of the mold cavity in an all-round manner, and the latter spraying the special parts such as the stepped triangular bracket in a fine manner to ensure that the release agent is evenly covered. After the spraying is completed, the spraying assembly (5) and the inner spraying assembly (6) are reset through the lifting mechanism (4) to avoid interference with the subsequent die-casting process; S3, the die-casting machine body (1) drives the moving die plate (201), the fixed die plate (202) and the side die plate (203) to close, forming a closed mold cavity, scooping an appropriate amount of liquid aluminum alloy from the furnace and pouring it into the gate in the die-casting machine body (1), and the injection mechanism inside the die-casting machine body (1) quickly injects the aluminum liquid into the mold cavity at a set high speed and high pressure, and maintains a certain pressure until the aluminum liquid is completely cooled and solidified. After the pressure holding is completed, the die-casting machine body (1) controls the die plate to open, completing the mold opening operation; S4. After the mold is opened, the jet demoulding component (3) is started. After the molded step is ejected from the mold by the jet demoulding component (3), the demoulded step is accurately grasped by the external transfer robot arm and transferred to the designated workstation, completing the entire die-casting production process.

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