A stepped die-casting processing mold and its usage method

Abstract

The present invention discloses a stepped die-casting processing mold and a usage method, which relates to the technical field of die-casting processing; the present invention includes a die-casting machine body, the die-casting machine body is stably installed with a stepped processing mold through a high-precision hydraulic clamping device, and a jet demolding assembly for assisting demolding is integrated inside the stepped processing mold. The top of the die-casting machine body is equipped with a lifting mechanism through a fixed bracket, and the driving end of the lifting mechanism is connected with a surface spraying assembly. An inner spraying assembly for evenly spraying special parts of the stepped triangular bracket is provided in the surface spraying assembly; by setting the inner spraying assembly, the present invention can accurately spray the release agent along the trajectories of special parts of complex structures such as the stepped triangular bracket, and at the same time, the necking design of the connecting pipe is used to increase the flow rate of the release agent, and the rotating spraying function of the atomizing nozzle is combined to effectively solve the problem that it is difficult for traditional spraying to reach special parts, and significantly improve the uniformity of the release agent spraying.

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 an escalator. They are a type 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 and assembled. 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.

[0003] During die-casting, it is necessary to spray a 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 the casting easy to demold. Due to the special structure of the escalator step, there is a triangular support connection structure between the tread and the riser. The triangular support connection structure will block the spraying of the release agent. The conventional nozzle arrangement has uneven spraying, resulting in insufficient adhesion of the release agent in these parts, and it is easy to have the phenomenon of sticking to the mold during die-casting. Secondly, usually, two methods of using a push rod and a push plate 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-cast 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-cast part and the mold will be affected by the vacuum adsorption force, making it difficult for the die-cast part to be removed from the mold, and further resulting in problems such as deformation, scratching, and even damage of the die-cast 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

[0004] In order to solve the problems of evenly spraying the release liquid at the connection structure of the step triangular support and assisting in demolding the step after die-casting; the purpose of the present invention is to provide a stepped die-casting processing mold and a usage method thereof.

[0005] 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 in 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 evenly spraying special parts of the step triangular support.

[0006] Preferably, the jet demolding assembly includes a push rod. An air guide groove for gas transmission is provided inside the push rod. Eight exhaust grooves for assisting in stepped demolding are provided 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 provided in the middle of the moving template, and 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, and 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.

[0007] 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 provided inside the liquid inlet frame. A connecting pipe is vertically connected to 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 provided 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 provided 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 provided between the two sliders near one side of the first spraying frame. A flipping frame is rotatably provided on the side plate, and both ends of the flipping frame are respectively sleeved on the outer walls of the corresponding connecting pipes. An electric cylinder is rotatably provided in the middle of the inner wall of the side plate, and the driving end of the electric cylinder is rotatably connected to the flipping frame. A lifting frame is slidably installed on the inner wall of the spraying frame through a slide rail. A motor is fixedly provided in the middle of one side of the top end of the spraying frame, and the driving end of the motor is fixedly connected to 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 provided on the inner sides of the two sliders. Two sliding grooves corresponding to the stepped connecting rods are provided on the guide plates. Horizontal grooves are provided on both sides of the lifting frame, and the guide bolts slide in the corresponding sliding grooves and horizontal grooves.

[0008] 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 provided inside the moving template. A sliding trapezoidal block is slidably provided in the middle of the push plate. A guide rod that cooperates with the sliding trapezoidal block is fixedly provided on the inner wall of the moving template. The guide rod is inclined upward. A return spring is sleeved on the outer wall of the push rod, and both 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.

[0009] 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 connected in an orderly manner through pipelines and aggregated to be 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.

[0010] A method used for a stepped die-casting processing mold includes the following steps:

[0011] 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;

[0012] 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 sprays the inner wall of the mold cavity comprehensively, and the latter conducts fine spraying on special parts such as stepped triangular brackets to ensure that the demolding agent is evenly covered. After spraying is completed, reset the spraying assembly and the inner spraying assembly through the lifting mechanism to avoid interfering with subsequent die-casting processes;

[0013] 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;

[0014] 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 the designated station to complete the entire die-casting production process.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 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 in cooperation with the rotating spraying function of the atomizing nozzles, it effectively solves the problem that it is difficult for traditional spraying to reach special parts and significantly improves the uniformity of demolding agent spraying;

[0017] 2. The present invention constructs an efficient demoulding system by setting up a stepped machining die and a jet demoulding component. The ejector rod in the die-casting machine body drives the stepped machining die to move, driving the ejector rod to push out the die-cast stepped part. During this process, an external gas source continuously supplies gas to the air guide groove inside the ejector rod. With the help of the conical structure design of the end face of the ejector rod, when the ejector 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 the product qualification rate.

[0018] 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 machining die, effectively reducing the friction between the casting and the inner wall of the die, making it easier for the stepped casting to be separated from the die during demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the stepped machining die and the stepped part in the present invention;

[0022] Figure 3 It is a schematic diagram of the side sectional structure after the stepped machining die is closed in the present invention;

[0023] Figure 4 It is an exploded structure diagram of the stepped machining die in the present invention;

[0024] Figure 5 It is an exploded structure diagram of the surface spraying component in the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the inner spraying component in the present invention;

[0026] Figure 7 It is a partial structure schematic diagram of the inner spraying component in the present invention;

[0027] Figure 8Schematic diagram of the overall connection of the atomizing nozzle in the present invention;

[0028] Figure 9 is Figure 3 Enlarged schematic diagram of the structure at position A in;

[0029] Figure 10 is Figure 4 Enlarged schematic diagram of the structure at position B in;

[0030] Figure 11 is Figure 6 Enlarged schematic diagram of the structure at position C in;

[0031] Figure 12 is Figure 6 Enlarged schematic diagram of the structure at position D in.

[0032] In the figure: 1, die-casting body; 2, stepped 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 demoulding assembly; 301, push rod; 302, air guide groove; 303, exhaust groove; 304, baffle; 305, limit plate; 306, intake 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, driving 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. Specific embodiments

[0033] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment: As Figure 1-12As shown in the figure, the present invention provides a technical solution: a stepped die-casting processing mold, including a die-casting machine body 1. The die-casting machine body 1 is stably installed with a stepped processing mold 2 through a high-precision hydraulic clamping device. An air jet demolding component 3 for assisting demolding is integrated inside the stepped processing mold 2. A lifting mechanism 4 is carried on the top end of the die-casting machine body 1 through a fixed bracket. The driving end of the lifting mechanism 4 is connected with a surface spraying component 5 for spraying a demolding agent on the inner wall of the cavity of the stepped processing mold 2. An inner spraying component 6 for evenly spraying special parts of the stepped triangular bracket is provided in the surface spraying component 5;

[0035] The air jet demolding component 3 includes a push rod 301. A gas guide groove 302 for gas transmission is opened inside the push rod 301. Eight exhaust grooves 303 for assisting in stepped demolding are opened at the end of the push rod 301 and are distributed in an annular array. Moreover, the exhaust grooves 303 are connected to the gas guide groove 302 in a through manner;

[0036] The inner spraying component 6 includes two symmetrically distributed sliders 601. The two sliders 601 slide flexibly on both sides of the surface spraying component 5 respectively. Liquid inlet frames 602 are fixedly connected to the outer sides of the two sliders 601 respectively. A rotating liquid guide 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 guide frame 603. The diameter of the middle part of the connecting pipe 604 is narrowed and is in 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 are fixedly arranged on the outer wall of the driving shaft 605 at the necking part of the connecting pipe 604 and are distributed in an annular array.

[0037] By adopting the above technical solution, the cavity of special parts such as the stepped triangular bracket can be finely sprayed to ensure that the demolding agent is evenly covered, while reducing the demolding resistance and providing high demolding efficiency.

[0038] The stepped 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. A guide rod 207 that cooperates with the sliding trapezoidal block 206 is fixedly arranged on the inner wall of the moving template 201. The guide rod 207 is inclined upward.

[0039] 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 guidance of the guide rod 207.

[0040] A push groove corresponding to the push rod 301 is provided 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 limit 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 limit plate 305. An air inlet pipe 306 is connected to the air inlet of the push rod 301 in a penetrating manner, and the air inlet pipe 306 is connected to the driving end of an external air source.

[0041] By adopting the above technical solution, the baffle 304 is limited by the limit plate 305, thereby limiting the moving distance of the push rod 301.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 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.

[0047] By adopting the above technical solution, the lifting frame 614 moves up and down under the guidance of the slide rail.

[0048] 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 side of the two sliders 601. Two chutes corresponding to the step connecting rods are provided on the guide plates 613. Horizontal grooves are provided on both sides of the lifting frame 614, and the guide bolts 612 slide in the corresponding chutes and horizontal grooves.

[0049] By adopting the above technical solution, the slider 601 is guided by the guide plate 613, the lifting frame 614 and the guide bolt 612 to move.

[0050] 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 connected in an orderly manner through pipelines and are aggregated and connected to an external demoulding agent input pipeline.

[0051] 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 pipelines connecting a large number of atomizing nozzles 608 through pipelines.

[0052] By adopting the above technical solution, the atomizing nozzle 608 is connected to the external demoulding agent input pipeline through a pipeline, and the liquid inlet frame 602 is also connected to the nozzle pipeline, forming a complete demoulding agent delivery system.

[0053] A return spring 204 is sleeved on the outer wall of the push rod 301, and the two 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.

[0054] By adopting the above technical solution, the push plate 205 is guided by the guide posts 208 to move.

[0055] A method used for a stepped die-casting processing die includes the following steps:

[0056] 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.

[0057] 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. Then, through the coordinated operation of the spraying assembly 5 and the inner spraying assembly 6, the former sprays the inner wall of the die cavity comprehensively, and the latter performs fine spraying on special parts such as stepped triangular brackets to ensure that the demoulding agent is evenly covered. After spraying is completed, the spraying assembly 5 and the inner spraying assembly 6 are reset through the lifting mechanism 4 to avoid interfering with subsequent die-casting processes.

[0058] 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 die 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 die 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.

[0059] S4. After mold opening, the jet demolding assembly 3 is activated. After the formed steps are ejected from the mold by the jet demolding assembly 3, the demolded steps are precisely grasped by an external transfer robotic arm and transferred to the designated station, completing the entire die-casting production process.

[0060] Working principle: First, the spraying frame 501 is driven by the lifting mechanism 4 to descend to the central position between the moving template 201 and the fixed template 202. As shown in the figure, the electric cylinder 611 is controlled to open. The driving end of the electric cylinder 611 extends to push the flipping frame 610 to flip 90° around the rotational 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 shown in the figure, the mold release agent enters through the external mold release agent input pipeline and is distributed to each atomizing nozzle 608 through the pipeline system. The atomizing nozzles 608 on the first spraying frame 503 and the second spraying frame 504 atomize the mold release agent and evenly spray it on the surface of the mold cavity. The mold release agent entering 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 accelerates here. The high-speed flowing mold release agent 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; Figure 6 As shown in the figure, the electric cylinder 611 is controlled to open. The driving end of the electric cylinder 611 extends to push the flipping frame 610 to flip 90° around the rotational 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 shown in the figure, the mold release agent enters through the external mold release agent input pipeline and is distributed to each atomizing nozzle 608 through the pipeline system. The atomizing nozzles 608 on the first spraying frame 503 and the second spraying frame 504 atomize the mold release agent and evenly spray it on the surface of the mold cavity. The mold release agent entering 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 accelerates here. The high-speed flowing mold release agent 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; Figure 8 As shown in the figure, the mold release agent enters through the external mold release agent input pipeline and is distributed to each atomizing nozzle 608 through the pipeline system. The atomizing nozzles 608 on the first spraying frame 503 and the second spraying frame 504 atomize the mold release agent and evenly spray it on the surface of the mold cavity. The mold release agent entering 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 accelerates here. The high-speed flowing mold release agent 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;

[0061] Meanwhile, as shown in the figure, the motor 617 is started 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, the lifting frame 614 is driven 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, causing the lifting frame 614 to complete the rising and resetting 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 coordinated action of the guide plate 613, precisely controls the connecting pipe 604 to move along special parts such as the step triangular bracket, and combines with the rotational spraying function of the atomizing nozzles 608 on the connecting pipe 604 to achieve fine spraying operation of the mold release agent on the surface of complex structures; Figure 7 As shown in the figure, the motor 617 is started 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, the lifting frame 614 is driven 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, causing the lifting frame 614 to complete the rising and resetting 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 coordinated action of the guide plate 613, precisely controls the connecting pipe 604 to move along special parts such as the step triangular bracket, and combines with the rotational spraying function of the atomizing nozzles 608 on the connecting pipe 604 to achieve fine spraying operation of the mold release agent on the surface of complex structures;

[0062] After spraying is completed, the spraying assembly 5 and the inner spraying assembly 6 are reset by the lifting mechanism 4. Then, the die-casting machine 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 and close under the guidance of the fixed columns to form a closed mold cavity. An appropriate amount of liquid aluminum alloy is scooped from the melting furnace and poured 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 over, the die-casting machine body 1 controls the template to open, completing the mold opening operation;

[0063] After the mold opening is completed, the ejector rod inside the die-casting body 1 starts to work, pushing the push plate 205 to slide smoothly along the guide pillar 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 squeeze the return spring 204. At the same time as the ejector rod starts to work, an external air source is started, 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, when the push rod 301 separates 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 manipulator and transferred to the designated station, completing the entire die-casting production process, and the die-casting operation is carried out repeatedly in this way.

[0064] Obviously, those skilled in the art can make various changes and modifications 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 changes and modifications.

Claims

1. A stepped die-casting processing mold, comprising a die-casting machine body (1), characterized in that: The die-casting machine body (1) firmly mounts the stepped processing die (2) through a high-precision hydraulic clamping device. An air jet demolding assembly (3) for assisting demolding is integrated inside the stepped processing die (2). A lifting mechanism (4) is carried on the top of the die-casting machine body (1) through a fixed bracket. The driving end of the lifting mechanism (4) is connected to a surface spraying assembly (5) for spraying a demolding agent on the inner wall of the cavity of the stepped processing die (2). An inner spraying assembly (6) for evenly spraying special parts of the stepped triangular bracket is arranged in the surface spraying assembly (5). The air 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 exhaust grooves (303) for assisting in stepped demolding and distributed in an annular array are opened at the end of the push rod (301), and the exhaust grooves (303) are connected to the air guide groove (302) in a through manner. The inner spraying assembly (6) includes two symmetrically distributed sliders (601). The two sliders (601) 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 guide 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 guide frame (603). The diameter of the middle part of the connecting pipe (604) is narrowed, showing 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 hermetically 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).

2. The stepped die-casting processing die according to claim 1, wherein The stepped processing die (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). A guide rod (207) that cooperates with the sliding trapezoidal block (206) is fixedly arranged on the inner wall of the moving template (201). The guide rod (207) is arranged in an upward inclined manner.

3. The stepped die-casting processing die according to claim 2, characterized in that, A push groove corresponding to the push rod (301) is opened 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 a bolt, 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.

4. A stepped die-casting processing die as claimed in claim 1, wherein, 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).

5. A stepped die-casting processing die according to claim 1, characterized in that, A side plate (609) is fixedly provided on one side of the two sliders (601) close to the first spraying rack (503). A turning frame (610) is rotatably provided on the side plate (609), and both ends of the turning frame (610) are respectively sleeved on the outer walls of the corresponding connecting pipes (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 turning frame (610).

6. The stepped die-casting processing die according to claim 4, characterized in that, 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).

7. The stepped die-casting processing die according to claim 6, characterized in that, 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 formed on the guide plates (613). Horizontal grooves are formed on both sides of the lifting frame (614), and the guide bolts (612) slide in the corresponding chutes and horizontal grooves.

8. A stepped die-casting processing die as claimed in claim 7, wherein 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 connected in an orderly manner through pipelines and are aggregated and connected to an external release agent input pipeline; 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 pipelines connecting a number of atomizing nozzles (608) through pipelines.

9. The stepped die-casting processing die according to claim 1, characterized in that, 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 inner wall of the push groove in the baffle (304) and 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).

10. A method for using a die-casting processing die for a step as described in any one of claims 1-9, characterized in that, Including 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 component (5) to descend to the central position between the moving die plate (201) and the fixed die plate (202) through the lifting mechanism (4). Then, through the coordinated operation of the spraying component (5) and the inner spraying component (6), the former comprehensively sprays the inner wall of the mold cavity, and the latter performs fine spraying on special parts such as the stepped triangular bracket to ensure uniform coverage of the release agent. After spraying, reset the spraying component (5) and the inner spraying component (6) through the lifting mechanism (4) to avoid interfering 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 to form 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 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 opening of the die plate to complete the mold opening operation; S4. After mold opening, the air jet demolding component (3) is started. After the formed step is ejected from the mold through the air jet demolding component (3), accurately grab the demolded step through the external transfer robotic arm and transfer it to the designated station to complete the entire die-casting production process.

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