Exhaust assembly for a core structure

Abstract

The application relates to a core structure die exhaust assembly, which comprises a machining table, a fixed die and a movable die matched with each other arranged on the machining table, a through hole arranged on the fixed die, a limiting rod fixed on the movable die and penetrating through the through hole and movably matched with the fixed die, an exhaust cavity arranged on the movable die, and an exhaust assembly connected through the inside of the exhaust cavity and composed of an exhaust pin and a reset spring. The core structure die exhaust assembly has the beneficial effect that the exhaust assembly composed of the exhaust pin and the reset spring can timely exhaust the gas in the die during the die pressing process, avoids the gas from forming pores in the castings, and remarkably improves the quality of the castings. The core structure die exhaust assembly solves the problem that the gas is difficult to be completely exhausted in the traditional die casting process, and reduces the defective rate.

Description

Technical Field

[0001] This application relates to the field of die casting technology, and in particular to a die venting assembly with a core structure. Background Technology

[0002] Die casting is a metal casting process characterized by applying high pressure to molten metal within a mold cavity. The molds are typically made of high-strength alloys, and the process is somewhat similar to injection molding. Due to the high cost of casting equipment and molds, die casting is generally only used for mass production of large quantities of products. Several improved processes have emerged based on traditional die casting, including non-porous die casting, which reduces casting defects and eliminates porosity.

[0003] However, in the existing technology, die casting technology is widely used in the production of metal parts. It injects molten metal into the mold cavity under high pressure, and after cooling, it forms the parts of the required shape.

[0004] A search revealed a Chinese patent that discloses a stamping die (authorization announcement number CN116372024B). This patented technology can reduce the noise generated during the use of the die by setting up a shell and sound insulation plate. In addition, the use of alcohol can quickly cool down the stamping head and ensure its continuous service life.

[0005] However, the above-mentioned devices still have some drawbacks in practical use. The most obvious one is that during the die casting process, the gas inside the mold is difficult to completely escape, which easily forms pores inside the casting, leading to a decrease in casting quality and an increase in the defect rate. Therefore, this application provides a die venting assembly with a core structure. Utility Model Content

[0006] In view of the above-mentioned problems existing in the prior art, the main objective of this application is to provide a core structure compression molding venting assembly.

[0007] The technical solution of this application is as follows: It includes a processing table, on which a fixed mold and a moving mold are arranged to cooperate with each other. A through hole is provided on the fixed mold, and a limiting rod fixed on the moving mold passes through the through hole and movably cooperates with the fixed mold. An exhaust chamber is provided on the moving mold, and an exhaust assembly is connected through the interior of the exhaust chamber. The exhaust assembly consists of an exhaust pin and a return spring. A first exhaust hole and a second exhaust hole are respectively provided at both ends of the exhaust pin, and the second exhaust hole communicates with the first exhaust hole through the exhaust chamber. It also includes: A clamping mechanism for clamping and fixing a fixed mold; A pressing mechanism is used to drive the moving mold to move, and the fixed mold and the moving mold cooperate to form a core mold groove.

[0008] In a preferred embodiment, the clamping mechanism includes two slide rods that are symmetrically fixed on the processing table. Both ends of the slide rods are movably connected to clamping seats, and the fixed mold is clamped between the two clamping seats.

[0009] By adopting the above technical solution, the clamping seats can slide on the slide bar, and the two sliding clamping seats can clamp and fix the fixed mold.

[0010] In a preferred embodiment, a power mechanism is provided at the bottom of the processing table to drive the two clamping seats to move. The power mechanism includes a transmission box, through which a bidirectional screw is rotatably connected. A worm gear is fixedly connected to the bidirectional screw. A servo motor is fixedly connected to one side of the transmission box. The worm gear fixed to the output shaft of the servo motor is meshed with the worm gear.

[0011] By adopting the above technical solution, the servo motor can drive the worm to rotate, the worm can drive the meshing worm wheel to rotate, and the worm wheel is fixed in the middle of the bidirectional screw, so that the worm wheel drives the bidirectional threaded rod to rotate on the transmission box.

[0012] In a preferred embodiment, the bidirectional screw passes through and is threaded into the clamping seat, and the threads at both ends of the bidirectional screw are in opposite directions.

[0013] By adopting the above technical solution, a bidirectional screw with opposite thread directions can drive two threaded clamping seats to move in opposite directions.

[0014] In a preferred embodiment, the pressing mechanism includes a gantry frame, which is fixedly connected to the top of the processing table. A hydraulic cylinder is connected through the top of the gantry frame, and the telescopic end of the hydraulic cylinder is fixedly connected to the moving mold.

[0015] By adopting the above technical solution, the hydraulic cylinder that runs through the gantry can drive the fixedly connected moving mold to rise and fall through the telescopic end, so that the moving mold can press and open with the fixed mold.

[0016] In a preferred embodiment, a slip ring at one end of the exhaust pin slides within the exhaust chamber, one end of the return spring is fixedly connected to the slip ring, and the other end of the return spring is fixedly connected to the moving mold.

[0017] By adopting the above technical solution, the exhaust pin can be limited to slide within the exhaust chamber, and the return spring can be reset after compression.

[0018] In a preferred embodiment, the top of the moving mold is provided with an input hole, and the input hole is connected to the core mold groove.

[0019] By adopting the above technical solution, the material for the molding die can be injected into the core mold groove through the input hole for molding.

[0020] Compared with the prior art, the advantages and positive effects of this application are as follows: 1. In this application, the venting assembly, consisting of a venting pin and a return spring, can promptly expel gas from inside the mold during the die-casting process, preventing the formation of pores inside the casting and thus significantly improving the quality of the casting. This solves the problem of incomplete gas removal in traditional die-casting processes and reduces the defect rate.

[0021] 2. In this application, the fixed mold and the moving mold achieve precise limiting movement through the cooperation of the limiting rod and the through hole, which enhances the stability of the mold during the pressing process. This helps to reduce mold wear and extend the mold's service life. At the same time, the venting assembly, clamping mechanism, and pressing mechanism all adopt a modular design, making the installation, debugging, and maintenance processes simpler and faster. Attached Figure Description

[0022] Figure 1 This application provides a schematic diagram of the structure of a core-structured molding venting assembly; Figure 2 This application provides a bottom view of a core structure compression molding venting assembly. Figure 3 This application provides a schematic diagram of the moving mold of a core-structured compression molding venting assembly; Figure 4 This application provides a schematic diagram of the structure of the fixed mold of the compression molding venting assembly with a core structure; Figure 5 This application provides a schematic diagram showing the connection between the moving mold and the venting pin of a core-structured molding venting assembly; Figure 6 This application provides a top view of the moving mold of a core-structured mold venting assembly; Figure 7 This application provides a schematic diagram of the internal structure of the transmission box of a core-structured molded exhaust assembly.

[0023] Legend: 100. Fixed mold; 101. Perforation; 200. Moving mold; 201. Limiting rod; 202. Exhaust chamber; 300. Exhaust pin; 301. First exhaust port; 302. Second exhaust port; 303. Return spring; 400. Processing table; 401. Gantry frame; 4011. Hydraulic cylinder; 402. Slide rod; 4021. Clamping seat; 500, transmission box; 501, servo motor; 5011, worm gear; 502, double-acting screw; 5021, worm wheel. Detailed Implementation

[0024] The technical solutions in 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. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] Reference Figure 1-7 A core-structured mold venting assembly includes a processing table 400, on which a fixed mold 100 and a moving mold 200 are mounted and cooperate with each other. The fixed mold 100 has a through hole 101, which allows for limited movement between the fixed mold 100 and the moving mold 200, providing better stability. A limiting rod 201 fixed on the moving mold 200 passes through the through hole 101 and is movablely engaged with the fixed mold 100. The moving mold 200 has a venting chamber 202, and a venting assembly is connected through the venting chamber 202. The venting assembly consists of a venting pin 300 and a return spring 303. The two ends of the venting pin 300 have a first venting hole 301 and a second venting hole 302, respectively, and the second venting hole 302 communicates with the first venting hole 301 through the venting chamber 202. This allows the input of molding material into the pressed fixed mold 100 and moving mold 200. During the input of the material, the air pressure inside the mold can be discharged through the venting assembly, preventing the trapped gas from affecting the quality of the molded part. The assembly also includes: The clamping mechanism is used to clamp and fix the fixed mold 100, and can position and fix the fixed mold 100. The pressing mechanism is used to drive the moving mold 200 to move, and the fixed mold 100 and the moving mold 200 cooperate to form a core mold groove, so that the moving mold 200 can cooperate with the fixed mold 100 to press or open, which facilitates compression molding.

[0026] Reference Figure 1 , 2 Specifically, the clamping mechanism includes two slide rods 402, which are symmetrically fixed on the processing table 400. Both ends of the slide rods 402 are movably connected to clamping seats 4021, and the fixed mold 100 is clamped between the two clamping seats 4021. The clamping seats 4021 can slide on the slide rods 402, and the two sliding clamping seats 4021 can clamp and fix the fixed mold 100.

[0027] A power mechanism located at the bottom of the processing table 400 is used to drive the displacement of the two clamping seats 4021. The power mechanism includes a transmission box 500, through which a bidirectional screw 502 is rotatably connected. A worm gear 5021 is fixedly connected to the bidirectional screw 502. A servo motor 501 is fixedly connected to one side of the transmission box 500. The worm 5011 fixed to the output shaft of the servo motor 501 meshes with the worm gear 5021. The servo motor 501 can drive the worm 5011 to rotate, and the worm 5011 can drive the meshed worm gear 5021 to rotate. The worm gear 5021 is fixed in the middle of the bidirectional screw 502, thereby causing the worm gear 5021 to drive the bidirectional screw 502 to rotate on the transmission box 500.

[0028] The bidirectional screw 502 passes through and is threadedly engaged with the clamping seat 4021. The threads at both ends of the bidirectional screw 502 are in opposite directions. The bidirectional screw 502 with opposite thread directions can drive the two threaded clamping seats 4021 to move in opposite directions.

[0029] Reference Figure 1 Specifically, the pressing mechanism includes a gantry frame 401, which is fixedly connected to the top of the processing table 400. A hydraulic cylinder 4011 is connected through the top of the gantry frame 401. The telescopic end of the hydraulic cylinder 4011 is fixedly connected to the moving mold 200. The hydraulic cylinder 4011, which is connected through the gantry frame 401, can drive the fixedly connected moving mold 200 to rise and fall through the telescopic end, so that the moving mold 200 can press and open with the fixed mold 100.

[0030] Reference Figure 5 Specifically, a slip ring at one end of the vent pin 300 slides within the vent chamber 202. One end of the return spring 303 is fixedly connected to the slip ring, and the other end is fixedly connected to the moving mold 200. When the bottom end of the vent pin 300 is squeezed by air pressure, the increased pressure will push the vent pin 300 upward on the moving mold 200 and compress the return spring 303. This will connect the outlet end of the second vent hole 302 with the vent chamber 202, thereby enabling the second vent hole 302 to connect with 301 through the vent chamber 202, thus venting the gas in the core mold groove and improving the quality of the compression molding.

[0031] Reference Figure 6 Specifically, the top of the moving mold 200 is provided with an input hole, which is connected to the core mold groove, so that the material for pressing can be input into the core mold groove through the input hole.

[0032] Working principle: First, the fixed mold 100 is placed between two clamping seats 4021 on the processing table 400. The bidirectional screw 502 is driven to rotate by the servo motor 501, which in turn moves the two clamping seats 4021 towards the center, thus achieving a stable clamping of the fixed mold 100. At the same time, the moving mold 200 is driven to a predetermined position by the hydraulic cylinder 4011 on the gantry frame 401, ready to press with the fixed mold 100.

[0033] During the pressing process between the moving mold 200 and the fixed mold 100, molten metal is injected into the core mold groove through the input hole at the top of the moving mold 200. As the molten metal is injected, the air pressure inside the mold gradually increases. When the air pressure reaches a certain level, it pushes the vent pin 300 to slide upward in the vent chamber 202, compressing the return spring 303. At this time, the second vent hole 302 on the vent pin 300 communicates with the first vent hole through the vent chamber 202, forming an venting channel to discharge the gas inside the mold.

[0034] As the molten metal cools and solidifies, the air pressure inside the mold gradually decreases.

[0035] Under the action of the return spring 303, the vent pin 300 slides down to the initial position, closing the venting channel. At this time, the moving mold 200 and the fixed mold 100 are tightly fitted to ensure that the casting is smoothly formed in the core mold groove.

[0036] After molding is complete, hydraulic cylinder 4011 drives the moving mold 200 to move upward, separating it from the fixed mold 100. Subsequently, the operator removes the molded casting from the core mold groove, completing the entire compression molding process.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A core-structured mold venting assembly, comprising a processing table (400), characterized in that, The processing table (400) is provided with a fixed mold (100) and a moving mold (200) that cooperate with each other. The fixed mold (100) has a through hole (101). A limiting rod (201) fixed on the moving mold (200) passes through the through hole (101) and is movably engaged with the fixed mold (100). The moving mold (200) is provided with an exhaust chamber (202). An exhaust assembly is connected through the interior of the exhaust chamber (202). The exhaust assembly consists of an exhaust pin (300) and a return spring (303). The two ends of the exhaust pin (300) are respectively provided with a first exhaust hole (301) and a second exhaust hole (302). The second exhaust hole (302) is connected to the first exhaust hole (301) through the exhaust chamber (202). The machine also includes: A clamping mechanism for clamping and fixing a fixed mold (100); The pressing mechanism is used to drive the displacement of the moving mold (200), and the fixed mold (100) cooperates with the moving mold (200) to form a core mold groove.

2. The core-structured compression molding venting assembly according to claim 1, characterized in that: The clamping mechanism includes two slide rods (402) that are symmetrically fixed on the processing table (400). Both ends of the slide rods (402) are movably connected to clamping seats (4021), and the fixed mold (100) is clamped between the two clamping seats (4021).

3. The core-structured compression molding venting assembly according to claim 2, characterized in that: The power mechanism provided at the bottom of the processing table (400) is used to drive the displacement of the two clamping seats (4021). The power mechanism includes a transmission box (500), through which a bidirectional screw (502) is rotatably connected. A worm gear (5021) is fixedly connected to the bidirectional screw (502). A servo motor (501) is fixedly connected to one side of the transmission box (500). The worm (5011) fixed to the output shaft of the servo motor (501) is meshed with the worm gear (5021).

4. The core-structured compression molding venting assembly according to claim 3, characterized in that: The bidirectional screw (502) passes through and is threaded into the clamping seat (4021), and the threads at both ends of the bidirectional screw (502) are in opposite directions.

5. The core-structured compression molding venting assembly according to claim 1, characterized in that: The pressing mechanism includes a gantry (401), which is fixedly connected to the top of the processing table (400). A hydraulic cylinder (4011) is connected through the top of the gantry (401), and the telescopic end of the hydraulic cylinder (4011) is fixedly connected to the moving mold (200).

6. The core-structured compression molding venting assembly according to claim 1, characterized in that: The slip ring at one end of the exhaust pin (300) slides in the exhaust chamber (202), and one end of the return spring (303) is fixedly connected to the slip ring, while the other end of the return spring (303) is fixedly connected to the moving mold (200).

7. The core-structured compression molding venting assembly according to claim 1, characterized in that: The top of the moving mold (200) is provided with an input hole, and the input hole is connected to the core mold groove.

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