Die casting device and die casting method

Abstract

A die casting device (100) and a die casting method, relating to the technical field of die casting. The die casting device (100) comprises a conveying cylinder (110), a shot sleeve (120), and a conveying pipe (130). The conveying cylinder (110) comprises a cylinder body (111) and an extrusion member (112); the cylinder body (111) is provided with a charging port (1111), an accommodating cavity (1113), and a discharging port (1112); the charging port (1111) and the discharging port (1112) each are in communication with the accommodating cavity (1113); the accommodating cavity (1113) is used for accommodating a material melt added from the charging port (1111); the extrusion member (112) slidably passes through the accommodating cavity (1113). The shot sleeve (120) comprises a sleeve body (121) and a shot member (122); the sleeve body (121) is provided with a feeding port (1212), a shot cavity (1211), and an injection port (1213); the feeding port (1212) and the injection port (1213) each are in communication with the shot cavity (1211); the injection port (1213) is adapted to be connected to a cavity of a mold (200); the shot member (122) slidably passes through the shot cavity (1211). One end of the conveying pipe (130) is sealingly connected to the discharging port (1112), and the end of the conveying pipe (130) distant from the discharging port (1112) is sealingly connected to the feeding port (1212). The phenomenon of air pores present inside die-cast products can be mitigated.

Description

Die casting equipment and die casting method

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on August 26, 2024, with application number 2024111820281 and entitled "Die Casting Apparatus and Die Casting Method", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of die casting technology, and in particular to a die casting apparatus and a die casting method. Background Technology

[0004] Die casting is a metal casting process that uses a mold cavity to apply high pressure to molten metal. In related technologies, after the raw material is melted in a heating cylinder, it needs to be transferred to the injection chamber via a carrier. During the transfer process, the molten metal cools down due to contact with air, requiring high-speed injection into the mold cavity, which results in the product containing air bubbles. Summary of the Invention

[0005] Based on this, this application provides a die-casting apparatus and a die-casting method.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, embodiments of this application provide a die-casting apparatus, comprising:

[0008] The conveying cylinder includes a cylinder body and an extrusion component. The cylinder body is provided with a feeding port, a receiving cavity, and a discharging port. The feeding port and the discharging port are respectively connected to the receiving cavity. The receiving cavity is used to hold the molten material added by the feeding port. The extrusion component slides through the receiving cavity.

[0009] An injection chamber includes a chamber body and an injection component. The chamber body is provided with a feed inlet, an injection cavity, and a sprue inlet. The feed inlet and the sprue inlet are respectively connected to the injection cavity. The sprue inlet is used to connect to the mold cavity. The injection component slides through the injection cavity.

[0010] The conveying pipeline has one end sealed to the discharge port and the other end of the conveying pipeline, away from the discharge port, sealed to the inlet port.

[0011] The molten material in the receiving cavity can be transported to the injection cavity through the conveying pipe under the push of the extruder; the molten material in the injection cavity can be transported to the mold cavity through the injection port under the push of the injection element.

[0012] In one embodiment of the first aspect, the delivery pipe is inclined, and the end of the delivery pipe connected to the injection chamber is at a higher height in the direction of gravity than the end of the delivery pipe connected to the delivery cylinder.

[0013] In one embodiment of the first aspect, the extruder has a first preset position and a second preset position relative to the receiving cavity;

[0014] When the extruded part is in the first preset position, the feeding port is open, and the feeding port, the receiving cavity and the discharge port are interconnected.

[0015] When the extruder is in the second preset position, the extruder seals the feeding port, and the receiving cavity is connected to the discharge port.

[0016] In one embodiment of the first aspect, the extruder includes a first push rod and a first plunger, the first plunger being connected to one end of the first push rod, and the first plunger being used to extrude molten material from the receiving cavity through the discharge port.

[0017] In one embodiment of the first aspect, the injection member has a third preset position and a fourth preset position relative to the injection cavity;

[0018] When the injection component is in the third preset position, the feed port is open, and the feed port, injection chamber, injection port, discharge port and receiving chamber are interconnected.

[0019] When the extruder is in the second preset position, the injection component extrudes the molten material in the injection chamber and seals the feed port, and the injection chamber is connected to the injection port;

[0020] When the injection component is in the fourth preset position, the injection component pushes the molten material in the injection chamber into the mold cavity, and the extrusion component resets to the first preset position.

[0021] In one embodiment of the first aspect, the injection element includes a second push rod and a second plunger, the second plunger being connected to one end of the second push rod, and the second plunger being used to push the molten material in the injection chamber into the mold cavity.

[0022] In one embodiment of the first aspect, the receiving cavity includes a first cavity and a second cavity that are independent of each other. The first cavity is in communication with the second cavity. The feeding port is located on one side of the first cavity and is in communication with the first cavity. The discharging port is located on one side of the second cavity and is in communication with the second cavity. The extruder slides through the first cavity.

[0023] In one embodiment of the first aspect, the delivery cylinder further includes a partition that divides the receiving cavity into a first cavity and a second cavity.

[0024] In one embodiment of the first aspect, the die-casting apparatus further includes a heating element disposed around the periphery of the conveying cylinder.

[0025] Secondly, embodiments of this application also provide a die-casting method, employing the die-casting apparatus in any of the above embodiments, the die-casting method comprising:

[0026] Adjust the extrusion piece to the first preset position, open the feeding port of the conveying cylinder, and add molten material into the receiving cavity of the conveying cylinder;

[0027] Adjust the injection part to the third preset position to open the feed port of the injection chamber;

[0028] The extruder is pushed to the second preset position and the feeding port is blocked, allowing the molten material to enter the injection chamber;

[0029] The injection component is pushed to the fourth preset position and the feed port is blocked, while the extrusion component is reset to the first preset position;

[0030] When the injection part reaches the fourth preset position, the molten material is injected into the mold cavity.

[0031] Compared to related technologies, the advantages of this application are as follows: This application provides a die-casting apparatus and a die-casting method, which can be used for metal die-casting. The die-casting apparatus includes a conveying cylinder, an injection chamber, and a conveying pipeline, wherein the conveying pipeline is sealed to both the conveying cylinder and the injection chamber. The conveying cylinder contains an extrusion component for conveying the molten metal, and the injection chamber contains an injection component for injecting the molten metal into the mold cavity. In this way, during the die-casting process, the molten metal is fed through a pipeline throughout, avoiding cooling caused by contact with external air during the conveying process. At the same time, there is no need to inject into the mold cavity during the pressing process, the injection rate of the molten metal is relatively slow, and the residual air in the mold cavity has sufficient time to escape, improving the problem of porosity in the product. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0033] Figure 1 is a schematic diagram of the initial state structure of the die-casting apparatus in some embodiments of this application;

[0034] Figure 2 is a schematic diagram of the structure of the conveying cylinder in some embodiments of this application;

[0035] Figure 3 is a schematic diagram of the structure of the injection chamber in some embodiments of this application;

[0036] Figure 4 is a schematic diagram of the die-casting state structure of the die-casting apparatus in some embodiments of this application;

[0037] Figure 5 is a schematic diagram of the die-casting state structure of the die-casting apparatus in some embodiments of this application;

[0038] Figure 6 is a schematic diagram of the reset state structure of the die-casting device in some embodiments of this application;

[0039] Figure 7 is a schematic flowchart of the die-casting method in some embodiments of this application.

[0040] Explanation of reference numerals in the attached drawings: 100, die-casting device; 110, conveying cylinder; 111, cylinder body; 1111, feeding port; 1112, discharging port; 1113, receiving cavity; 11131, first cavity; 11132, second cavity; 112, extrusion part; 1121, first push rod; 1122, first plunger; 113, partition plate; 120, injection chamber; 121, chamber body; 1211, injection cavity; 1212, feeding port; 1213, injection port; 122, injection part; 1221, second push rod; 1222, second plunger; 130, conveying pipe; 140, heating element; 200, mold. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In die casting, raw materials are shaped into blocks or other forms, melted in a heating cylinder, and then transferred to an injection chamber. However, during this transfer, the molten metal comes into contact with external air, causing cooling and making it difficult to maintain the maximum temperature before injection into the mold cavity. Furthermore, to prevent cooling, the molten metal needs to be injected into the mold cavity at high speed, making it difficult for air to escape quickly. This results in residual gas in the molten metal, leading to porosity in the product and low density (typically only 90%-98%), with mechanical properties far below the specifications of the raw material. Moreover, grinding after forming exposes these internal pores, causing poor appearance and surface defects. This hinders surface treatment processes such as anodizing, painting, powder coating, electroplating, micro-arc oxidation, and electrophoretic painting, negatively impacting product yield and increasing costs.

[0043] Therefore, embodiments of this application provide a die-casting apparatus 100, which can be used in metal die-casting processes. The die-casting apparatus 100 provided by this application can improve the problem of porosity in products.

[0044] Referring to Figure 1, the die-casting apparatus 100 includes a conveying cylinder 110, an injection chamber 120, and a conveying pipe 130.

[0045] Referring to Figure 2, the conveying cylinder 110 includes a cylinder body 111 and an extruder 112. The cylinder body 111 is provided with a feeding port 1111, a receiving cavity 1113 and a discharge port 1112. The feeding port 1111 and the discharge port 1112 are respectively connected to the receiving cavity 1113. The receiving cavity 1113 is used to hold the molten material, and the extruder 112 slides through the receiving cavity 1113.

[0046] Referring to Figure 3, the injection chamber 120 includes a chamber body 121 and an injection element 122. The chamber body 121 is provided with a feed inlet 1212, an injection cavity 1211, and a sprue inlet 1213. The feed inlet 1212 and the sprue inlet 1213 are respectively connected to the injection cavity 1211. The sprue inlet 1213 is used to connect to the cavity of the mold 200. The injection element 122 is slidably disposed in the injection cavity 1211. One end of the conveying pipe 130 is sealed to the discharge port 1112, and the end of the conveying pipe 130 away from the discharge port 1112 is sealed to the feed inlet 1212.

[0047] The molten material in the receiving cavity 1113 can be transported to the injection cavity 1211 through the conveying pipe 130 under the push of the extruder 112; the molten material in the injection cavity 1211 can be transported to the mold cavity 200 through the injection port 1213 under the push of the injection element 122.

[0048] For example, the conveying cylinder 110 can be made of a high-temperature resistant material and is used to convey molten metal. The feed port 1111 and the discharge port 1112 are located on the sides of the cylinder body 111, and their specific orientation is not limited, as long as the feed port 1111 is sealed when the discharge port 1112 discharges. In this embodiment, the feed port 1111 and the discharge port 1112 are located on opposite sides of the cylinder body 111. The receiving cavity 1113 is connected to both the feed port 1111 and the discharge port 1112, thereby allowing molten metal to be added from the external molten pool into the receiving cavity 1113 through the feed port 1111. The extruder 112 passes through the receiving cavity 1113 and, under the action of the thrust device, can extrude the molten metal from the discharge port 1112 into the injection chamber 120.

[0049] The injection chamber 120 is used to inject the molten metal delivered to the injection cavity 1211 into the cavity of the mold 200. The inlet 1212 is located on the side of the injection cavity 1211, and the injection element 122 passes through the injection cavity 1211. The injection port 1213 is located at the pushing end of the injection element 122 and communicates with the cavity of the mold 200. After the molten metal is delivered to the injection cavity 1211, the injection element 122, under the action of the thrust device, injects the molten metal into the cavity of the mold 200.

[0050] The two ends of the conveying pipeline 130 are sealed to the conveying cylinder 110 and the injection chamber 120 respectively, so that the molten liquid is conveyed in a pipeline manner during the conveying process, reducing the temperature loss of the molten liquid during the transfer process.

[0051] It should be noted that the thrust device in the embodiments of this application can be a pneumatic cylinder, hydraulic cylinder, linear motor or other device with telescopic function. The specific device can be selected according to actual needs, and no specific limitation is made here.

[0052] In summary, the die-casting apparatus 100 provided in this application embodiment, through the feeding of the extruder 112, discharges the molten liquid from the outlet 1112 and then transports it through the conveying pipe 130 to the injection chamber 1211 of the injection chamber 120. This entire process is pipeline-based, reducing temperature loss of the molten liquid during transport. Simultaneously, the injection element 122 propels the molten liquid in the injection chamber 1211 slowly into the mold cavity 200, allowing sufficient time for residual air in the mold cavity to escape and ultimately exit through the vent hole. This prevents turbulence in the mold cavity due to excessive injection speed, improving workpiece quality. Furthermore, during the pressing process, the molten liquid is in a semi-liquid and semi-solid state, resulting in products with high density, low stress, and perfect appearance even in precise and small areas.

[0053] In some embodiments, the delivery pipe 130 is inclined, and the end of the delivery pipe 130 connected to the injection chamber 120 is at a higher height in the direction of gravity than the end of the delivery pipe 130 connected to the delivery cylinder 110.

[0054] For example, the inlet 1212 of the injection chamber 120 is higher than the outlet 1112 of the delivery cylinder 110 in the direction of gravity, so that the melt in the delivery pipe 130 can flow back to the receiving cavity 1113 of the delivery cylinder 110 during the injection operation through the inclined connection of the delivery pipe 130.

[0055] Referring to Figures 4 and 5, in some embodiments, the extruder 112 has a first preset position and a second preset position relative to the receiving cavity. When the extruder 112 is in the first preset position, the feeding port 1111 is open, and the feeding port 1111, the receiving cavity 1113, and the discharge port 1112 are interconnected. When the extruder 112 is in the second preset position, the extruder 112 seals the feeding port 1111, and the receiving cavity 1113 is connected to the discharge port 1112.

[0056] For example, the first preset position is the initial position of the extruder 112. At this time, the first plunger 1122 is located above the first cavity 11131, and the feeding port 1111 is located in the middle of the first cavity 11131 and is in an open state, so that the molten material can be added into the first cavity 11131 through the feeding port 1111. The second preset position is the position where the extruder 112 reaches its maximum displacement. At this time, the first plunger 1122 is located at the bottom of the first cavity 11131, so that the molten material is injected into the second cavity 11132 and injected into the injection chamber 120 through the discharge port 1112. At the same time, the outer wall of the first push rod 1121 is in contact with the wall of the first cavity 11131, thereby blocking the feeding port 1111 located on one side of the wall of the first cavity 11131 and preventing the molten material from flowing back during the extrusion process.

[0057] In some embodiments, the extruder 112 is attached to the wall of the conveying cylinder 110, and the feeding port 1111 is provided on one side of the extruder 112.

[0058] For example, the extruder 112 can perform reciprocating propulsion under the action of the thrust device. By fitting the extruder 112 against the wall of the conveying cylinder 110, the molten liquid in the receiving cavity 1113 is pushed out from the discharge port 1112 during the extrusion process, preventing the molten liquid from seeping out from the side of the extruder 112 during the propulsion process. At the same time, during the propulsion process, the extruder 112 blocks the feed port 1212 to prevent the molten liquid from flowing back.

[0059] In some embodiments, the extruder 112 includes a first push rod 1121 and a first plunger 1122. The first plunger 1122 is connected to one end of the first push rod 1121 and is used to extrude molten material from the outlet 1112.

[0060] For example, the first plunger 1122 can be similar to a piston structure. Driven by the first push rod 1121, the first plunger 1122 can reciprocate within the receiving cavity 1113, thereby squeezing the molten liquid in the receiving cavity 1113 into the injection chamber 120.

[0061] Referring to Figures 4 and 6, in some embodiments, the injection member 122 has a third preset position and a fourth preset position relative to the injection cavity 1211. When the injection member 122 is in the third preset position, the feed port 1212 is open, and the feed port 1212, the injection cavity 1211, the injection port 1213, the discharge port 1112, and the receiving cavity 1113 are interconnected. When the extruder 112 is in the second preset position, the injection member 122 extrudes the molten material in the injection cavity 1211 and seals the feed port 1212, and the injection cavity 1211 is connected to the injection port 1213. When the injection member 122 is in the fourth preset position, the injection member 122 pushes the molten material in the injection cavity 1211 into the mold cavity 200, and the extruder 112 returns to the first preset position.

[0062] For example, the third preset position is the initial position of the injection element 122. At this time, the second plunger 1222 is located below the feed port 1212, which is in an open state, so that the molten liquid is conveyed into the injection cavity 1211 by the extruder 112. The fourth preset position is the position where the injection element 122 reaches its maximum upward displacement. At this time, the second plunger 1222 is located at the injection port 1213 at the top of the injection cavity 1211, thereby injecting the molten liquid into the cavity of the mold 200. At the same time, the outer wall of the second push rod 1221 is in contact with the wall of the injection cavity 1211, thereby blocking the feed port 1212 located on one side of the wall of the injection cavity 1211, preventing the molten liquid in the injection cavity 1211 from flowing out of the feed port 1212 during the injection process.

[0063] In some embodiments, the injection element 122 is attached to the wall of the injection chamber 120, and the feed port 1212 is disposed on one side of the injection element 122.

[0064] For example, the injection element 122 can perform reciprocating propulsion under the action of a corresponding thrust device. Through the close fit between the injection element 122 and the wall of the injection chamber 120, the molten metal in the injection cavity 1211 is pushed out from the injection port 1213 during the injection process, preventing the molten metal from seeping out from the side of the injection element 122 during propulsion. Simultaneously, during propulsion, the injection element 122 blocks the feed port 1212 to prevent molten metal backflow.

[0065] Furthermore, during the die casting process, after the extruder 112 forces the molten metal into the injection chamber 1211, the injection component 122 immediately advances forward, lifting the molten metal within the injection chamber 1211 and simultaneously sealing the feed port 1212 to prevent molten metal backflow. The extruder 112 then resets, and the molten metal in the pipe flows back into the receiving cavity 1113. Simultaneously, the injection component 122 continues to advance towards the mold 200, injecting the molten metal into the cavity of the mold 200 before resetting.

[0066] In some embodiments, the injection member 122 includes a second push rod 1221 and a second plunger 1222. The second plunger 1222 is connected to one end of the second push rod 1221 and is used to push the molten material into the cavity of the mold 200.

[0067] For example, the second plunger 1222 can be a piston structure similar to the first plunger 1122. Driven by the second push rod 1221, the second plunger 1222 can reciprocate within the injection chamber 1211, thereby injecting the molten material in the injection chamber 1211 into the mold cavity 200.

[0068] In some embodiments, the receiving cavity 1113 includes a first cavity 11131 and a second cavity 11132 that are independent of each other. The first cavity 11131 is connected to the second cavity 11132. The feeding port 1111 is connected to the first cavity 11131. The discharge port 1112 is connected to the second cavity 11132. The extruder 112 passes through the first cavity 11131.

[0069] For example, the first cavity 11131 is a feeding cavity and is connected to the feeding port 1111, and the second cavity 11132 is a discharging cavity and is connected to the discharging port 1112. Thus, the molten liquid is added into the first cavity 11131 through the feeding port 1111, and then discharged from the second cavity 11132 and the discharging port 1112 under the extrusion of the extruder 112.

[0070] A feeding hopper may be provided at the end of the feeding port 1111 away from the first cavity 11131. The feeding hopper has a conical structure, which facilitates the addition of molten metal into the feeding hopper during feeding, and allows it to flow along the hopper wall into the feeding port 1111 and the first cavity 11131. The first cavity 11131 and the second cavity 11132 can be connected at a certain angle, thereby adjusting the direction of the discharge port 1112 to meet the needs of molten metal transportation in different directions.

[0071] In some embodiments, the conveying cylinder 110 further includes a partition 113, which divides the receiving cavity 1113 into a first cavity 11131 and a second cavity 11132.

[0072] For example, both the first cavity 11131 and the second cavity 11132 are vertically arranged, and the partition 113 separates the first cavity 11131 and the second cavity 11132, with the bottom ends of the first cavity 11131 and the second cavity 11132 connected to form a U-shaped structure. When the surface pressure of the molten liquid inside the two cavities is the same, the height of the molten liquid in the two cavities is the same.

[0073] In some embodiments, the die-casting apparatus 100 further includes a heating element 140 disposed around the periphery of the conveying cylinder 110.

[0074] For example, the heating element 140 can heat and maintain the temperature of the conveying cylinder 110, thereby ensuring that the interior of the receiving cavity 1113 reaches a preset temperature value for material melting. Specifically, the preset temperature value can be set according to different raw materials, such as the melting point of iron (1538℃), cobalt (1495℃), and nickel (1455℃). By using the heating element 140, the material can be heated and melted, and during the die-casting process, the conveying cylinder 110 is kept at a high temperature, thus ensuring the die-casting quality of both the molten metal and the workpiece.

[0075] In some embodiments, a temperature sensor may also be installed inside the receiving cavity 1113, and a corresponding temperature threshold may be set according to the material. When the temperature inside the receiving cavity 1113 is lower than the preset temperature threshold, the heating element 140 automatically starts heating, which can reduce the energy consumption of the heating element 140 to a certain extent, while ensuring that the high temperature of the molten liquid is maintained.

[0076] In some embodiments, the heating element 140 may be an electromagnetic heater, which includes an electromagnetic coil wound around the periphery of the second cylinder 111.

[0077] For example, an electromagnetic heater can convert electrical energy into heat energy through the principle of electromagnetic induction. This conversion eliminates the need for an intermediate medium, thus avoiding energy loss. It also features rapid and accurate temperature control, allowing for precise control of the heated substance. Furthermore, it produces no waste gas or wastewater, and is flameless and odorless, making it safer than traditional heating methods using fuels such as coal gas.

[0078] However, electromagnetic heaters require the material being heated to have metallic conductivity; therefore, the embodiments in this application are not limited to electromagnetic heating. For non-magnetic metals, such as aluminum and titanium, resistance heating, electron beam heating, laser heating, and other methods can still be used.

[0079] Referring to Figure 7, an embodiment of this application also provides a die-casting method, employing the die-casting apparatus 100 in any of the above embodiments.

[0080] Die casting methods include:

[0081] S10, the extruder 112 is adjusted to the first preset position, so that the feeding port 1111 of the conveying cylinder 110 is opened, and the molten material is added into the receiving cavity 1113 of the conveying cylinder 110.

[0082] Referring to Figure 1, for example, when adding molten material to the conveying cylinder 110, the extruder 112 is located at the top of the first cavity 11131, and the feeding port 1111 is open. The feeding operation can be performed using a transfer device, such as a spoon. Specifically, an industrial camera and a robotic arm can work together. The spoon is mounted on the working end of the robotic arm, and the robotic arm uses the industrial camera to obtain the corresponding feeding position, thereby controlling the spoon to feed material into the feeding port 1111.

[0083] Meanwhile, to ensure the temperature of the molten liquid, the heating element 140 can be activated simultaneously to heat and maintain the temperature of the molten liquid in the conveying cylinder 110, ensuring that the molten liquid maintains the highest temperature during the injection process.

[0084] S20, adjust the injection component 122 to the third preset position to open the feed port 1212 of the injection chamber 120.

[0085] For example, the injection component 122 can be pre-adjusted to a third preset position below the feed port 1212 so that the feed port 1212 is in an open state, so that the molten liquid can flow into the injection chamber 1211 through the conveying pipe 130.

[0086] S30, the extruder 112 is pushed to the second preset position and the feeding port 1111 is blocked, and the molten material enters the injection chamber 1211.

[0087] Referring to Figure 4, exemplarily, after the molten material is fed, the extruder 112, under the action of the thrust device, can extrude the molten material downwards. The first plunger 1122 descends to the second preset position at the bottom of the first cavity 11131, allowing the molten material to flow into the injection chamber 1211 through the conveying pipe 130 and the feed port 1212. Simultaneously, the first push rod 1121 of the extruder 112 blocks the feed port 1111 to prevent the molten material from flowing back during the extrusion process.

[0088] S40, the injection component 122 is pushed to the fourth preset position and the feed port 1212 is blocked, and the extrusion component 112 is reset to the first preset position.

[0089] Referring to Figure 5, exemplarily, after the extruder 112 reaches the second preset position, the injection member 122 advances in the fourth preset direction, thereby pushing the molten liquid in the injection chamber 1211 upwards and sealing the feed port 1212 through the second push rod 1221 to prevent the molten liquid in the injection chamber 1211 from flowing out of the feed port 1212 during the injection process. At this time, the extruder 112 resets in the first preset direction, and the molten liquid in the conveying pipe 130 gradually flows back into the receiving cavity 1113.

[0090] S50, the injection part 122 reaches the fourth preset position, and the molten material is injected into the cavity of the mold 200.

[0091] Referring to Figure 5, exemplarily, during the resetting process of the extruder 112, the injection component 122 continuously advances upward, ultimately injecting the molten material in the injection chamber 1211 into the cavity of the mold 200. All the molten material remaining in the conveying pipe 130 flows back into the conveying cylinder 110. After injection is completed, the injection component 122 resets to the third preset position. Through the cyclical operation of the extruder 112 and the injection component 122, the production of the die-cast workpiece is completed.

[0092] The die-casting method provided in this application embodiment utilizes a closed-loop conveying pipeline 130, ensuring continuous pipeline transport and reducing temperature loss of the molten metal during transport. Through the coordinated propulsion of the extruder 112 and the injection unit 122, the molten metal in the injection chamber 1211 is slowly advanced into the mold cavity 200, allowing sufficient time for residual air within the mold cavity to escape and ultimately exit through the vent holes of the mold 200. This prevents turbulence within the mold cavity caused by excessively rapid injection, improving workpiece quality. Furthermore, during the pressing process, the solution exists in a semi-liquid and semi-solid state, resulting in die-cast workpieces with high density, low stress, and the ability to form perfectly shaped products even in precise and small areas. These products exhibit the appearance and mechanical properties of CNC (Computerized Numerical Control) machined sheets. The product density can exceed 98%, reducing defects caused by porosity or high-speed injection.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A die-casting apparatus, comprising: A conveying cylinder includes a cylinder body and an extruder. The cylinder body is provided with a feeding port, a receiving cavity, and a discharging port. The feeding port and the discharging port are respectively connected to the receiving cavity. The receiving cavity is used to hold the molten material added by the feeding port. The extruder slides through the receiving cavity. An injection chamber includes a chamber body and an injection component. The chamber body is provided with a feed inlet, an injection cavity, and a sprue inlet. The feed inlet and the sprue inlet are respectively connected to the injection cavity. The sprue inlet is used to connect to the mold cavity. The injection component is slidably disposed in the injection cavity. A conveying pipe, one end of which is sealed to the outlet, and the other end of which is sealed to the inlet; The molten material in the receiving cavity can be transported to the injection cavity through the conveying pipe under the push of the extruder; the molten material in the injection cavity can be transported to the mold cavity through the injection port under the push of the injection element.

2. The die-casting apparatus according to claim 1, wherein, The conveying pipe is inclined, and the end of the conveying pipe connected to the injection chamber is at a higher height in the direction of gravity than the end of the conveying pipe connected to the conveying cylinder.

3. The die-casting apparatus according to claim 1 or 2, wherein, The extrusion member has a first preset position and a second preset position relative to the receiving cavity; When the extruder is located in the first preset position, the feeding port is in the open state, and the feeding port, the receiving cavity, and the discharge port are interconnected. When the extruder is in the second preset position, the extruder seals the feeding port, and the receiving cavity communicates with the discharge port.

4. The die-casting apparatus according to claim 3, wherein, The extrusion component includes a first push rod and a first plunger. The first plunger is connected to one end of the first push rod and is used to extrude the molten material in the receiving cavity from the discharge port.

5. The die-casting apparatus according to claim 3 or 4, wherein, The injection member has a third preset position and a fourth preset position relative to the injection cavity; When the injection component is located at the third preset position, the feed port is in the open state, and the feed port, the injection chamber, the injection port, the discharge port, and the receiving chamber are interconnected. When the extruder is in the second preset position, the injection member extrudes the molten material in the injection chamber and seals the feed port, and the injection chamber is connected to the injection port; When the injection element is located at the fourth preset position, the injection element pushes the molten material in the injection chamber into the mold cavity, and the extrusion element returns to the first preset position.

6. The die-casting apparatus according to claim 5, wherein, The injection component includes a second push rod and a second plunger. The second plunger is connected to one end of the second push rod and is used to push the molten material in the injection chamber into the mold cavity.

7. The die-casting apparatus according to any one of claims 1-6, wherein, The receiving cavity includes a first cavity and a second cavity that are independent of each other. The first cavity is connected to the second cavity. The feeding port is located on one side of the first cavity and is connected to the first cavity. The discharging port is located on one side of the second cavity and is connected to the second cavity. The extruder slides through the first cavity.

8. The die-casting apparatus according to claim 7, wherein, The conveying cylinder also includes a partition, which divides the receiving cavity into the first cavity and the second cavity.

9. The die-casting apparatus according to any one of claims 1 to 8, wherein, The die-casting device also includes a heating element, which is disposed around the periphery of the conveying cylinder.

10. A die-casting method, employing the die-casting apparatus according to any one of claims 1 to 9, the die-casting method comprising: Adjust the extrusion piece to the first preset position, open the feeding port of the conveying cylinder, and add molten material into the receiving cavity of the conveying cylinder; Adjust the injection part to the third preset position to open the feed port of the injection chamber; The extruder is pushed to the second preset position and blocks the feeding port, allowing the molten material to enter the injection chamber; The injection component is advanced to the fourth preset position and blocks the feed port, while the extrusion component is reset to the first preset position; When the injection element reaches the fourth preset position, the molten material is injected into the mold cavity.

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