A metal die-casting mold for preventing sand holes

Abstract

This utility model relates to the field of die-casting mold technology, specifically a metal die-casting mold for preventing sand holes. It includes a first mold with an ejection structure comprising an ejector rod. The first mold also has a lubrication structure including oil storage chambers. Two oil storage chambers are provided on the first mold, and a piston is slidably connected to each chamber. Two first one-way valves are installed on the first mold, and a second one-way valve is installed on the piston. An oil groove is provided on the first mold, and a sliding rod is fixedly connected to the piston. The sliding rod is slidably connected to the first mold and driven by a drive structure. An air inlet is provided on the first mold. Lubrication of the ejector rod effectively reduces friction between it and the mold, slows down gap widening, prevents molten metal from entering the gap, ensures smooth ejection, improves the quality of the die-cast parts, and extends the service life of the ejector rod and the mold.

Description

Technical Field

[0001] This utility model relates to a metal die-casting mold, specifically a metal die-casting mold for preventing sand holes, and belongs to the field of die-casting mold technology. Background Technology

[0002] A metal casting mold is a specialized tool used in metal casting production. It consists of multiple components with specific cavity shapes, which allow molten metal to cool and solidify in the cavity to form a metal casting that conforms to the shape of the cavity. Its main function is to achieve batch and precise production of metal castings, ensure the dimensional accuracy and shape consistency of the castings, improve production efficiency, and reduce production costs. Ejector pins are usually set on the mold. After the casting solidifies in the cavity, the ejector pins can smoothly push the casting out of the cavity, completing the demolding process and ensuring the continuous operation of casting production.

[0003] However, during long-term use, the ejector pin will gradually increase the gap between it and the mold due to continuous friction. This makes it easier for molten metal to enter these enlarged gaps during the die casting process, causing the ejector pin to get stuck and affecting its normal ejection action. It can also cause defects such as burrs and missing material on the surface of the die casting, affecting the quality of the die casting. Utility Model Content

[0004] The purpose of this invention is to provide a metal die-casting mold that prevents sand holes in order to solve the above problems. By lubricating the ejector assembly, the friction between the ejector assembly and the mold can be effectively reduced, the gap can be slowed down, the molten metal can be prevented from entering the gap, the ejection action can be ensured to be smooth, the quality of the die-casting parts can be improved, and the service life of the ejector assembly and the mold can be extended.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a metal die-casting mold for preventing sand holes, comprising a first mold, an ejection structure including an ejector rod, a lubrication structure including an oil storage chamber, two oil storage chambers on the first mold, a piston slidably connected in the oil storage chambers, two first one-way valves installed on the first mold, a second one-way valve installed on the piston, an oil groove on the first mold, a sliding rod fixedly connected to the piston, the sliding rod being slidably connected to the first mold and driven by a drive structure, and an air inlet on the first mold.

[0006] Preferably, the first mold has two ejector rods slidably connected to it, a connecting plate is detachably connected between the two ejector rods, a connecting block is fixedly connected to the ejector rod, and the connecting block is slidably connected to the connecting plate.

[0007] Preferably, two limiting rods are slidably connected inside the connecting plate, and the two limiting rods are respectively engaged with the two connecting blocks.

[0008] Preferably, a guide block is fixedly connected to the limiting rod, and the guide block is slidably connected to the connecting plate.

[0009] Preferably, a driving block is slidably connected inside the connecting plate, and a guide rod is fixedly connected to the driving block.

[0010] Preferably, the guide block is slidably connected to the drive block, and the drive block is provided with an inclined surface.

[0011] Preferably, a lead screw is rotatably connected inside the connecting plate, the driving block is threadedly connected to the lead screw, and the connecting plate is driven by a second driving component, which is mounted on the first mold.

[0012] Preferably, the driving structure includes a driving rod, which is slidably connected to the first mold, and the sliding rod is fixedly connected to the driving rod.

[0013] Preferably, the first mold is equipped with an mounting plate, a rotating shaft is rotatably connected to the mounting plate, a drive wheel is fixedly connected to the rotating shaft, the drive wheel is provided with a cam groove, a drive shaft is rotatably connected to the drive rod, and the drive shaft is in rolling engagement with the cam groove.

[0014] Preferably, a first driving component is mounted on the mounting plate, the rotating shaft is driven by the first driving component, and a second mold is slidably connected to the first mold.

[0015] The beneficial effects of this utility model are as follows: the first mold is provided with an ejection structure, a lubrication structure, and two oil storage chambers. A piston is slidably connected in the oil storage chamber. Two first one-way valves are installed on the first mold, and a second one-way valve is installed on the piston. An oil groove is provided on the first mold, and a slide rod is fixedly connected to the piston. The slide rod is slidably connected to the first mold and driven by a drive structure. An air inlet is provided on the first mold. By lubricating the ejection assembly, friction between it and the mold can be effectively reduced, gap enlargement can be slowed, molten metal can be prevented from entering the gap, and the ejection action can be ensured to be smooth, thereby improving the quality of the die casting and extending the service life of the ejection assembly and the mold. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 3This is a schematic diagram of the connection structure between the push rod and the first mold of this utility model;

[0019] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of section B.

[0020] Figure 5 This is a schematic diagram of the connection structure between the connecting plate and the top rod of this utility model;

[0021] Figure 6 for Figure 5 The diagram shown is an enlarged view of the C-section structure.

[0022] Figure 7 This is a schematic diagram of the connection structure between the limiting rod and the connecting block of this utility model;

[0023] Figure 8 for Figure 7 The diagram shows an enlarged view of the structure of part D.

[0024] In the diagram: 1. First mold; 2. Lubrication structure; 201. Oil reservoir; 202. Piston; 203. First check valve; 204. Oil groove; 205. Second check valve; 206. Air inlet; 207. Slide rod; 3. Drive structure; 301. Drive rod; 302. Drive shaft; 303. Mounting plate; 304. Rotating shaft; 305. Drive wheel; 306. Cam groove; 307. First drive component; 4. Ejection structure; 401. Ejector rod; 402. Connecting plate; 403. Connecting block; 404. Second drive component; 405. Limiting rod; 406. Guide block; 407. Drive block; 408. Guide rod; 409. Lead screw; 5. Second mold. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-8As shown, a metal die-casting mold for preventing sand holes includes a first mold 1, an ejector structure 4, an ejector structure 4 including an ejector rod 401, a lubrication structure 2, an oil storage chamber 201, two oil storage chambers 201, a piston 202 slidably connected in the oil storage chamber 201, two first one-way valves 203 installed on the first mold 1, a second one-way valve 205 installed on the piston 202, an oil groove 204 on the first mold 1, a slide rod 207 fixedly connected to the piston 202, the slide rod 207 slidably connected to the first mold 1, the slide rod 207 being driven by a drive structure 3, and an air inlet 206 on the first mold 1.

[0027] As a technical optimization of this utility model, two ejector rods 401 are slidably connected to the first mold 1, and a connecting plate 402 is detachably connected between the two ejector rods 401. A connecting block 403 is fixedly connected to each ejector rod 401, and the connecting block 403 is slidably connected to the connecting plate 402. Two limiting rods 405 are slidably connected inside the connecting plate 402, and the two limiting rods 405 are respectively engaged with the two connecting blocks 403. A guide block 406 is fixedly connected to each limiting rod 405. A drive block 407 is slidably connected to a connecting plate 402, and a guide rod 408 is fixedly connected to the drive block 407. A guide block 406 is slidably connected to the drive block 407. The drive block 407 has an inclined surface. A lead screw 409 is rotatably connected to the connecting plate 402. When the top rod 401 needs to be replaced, an internal hexagonal wrench can be inserted into the hexagonal groove on the lead screw 409. By rotating the lead screw 409, the threaded drive of the drive block 407 slides. When the drive block 407 slides, the guide block 406 slides on the inclined surface of the drive block 407 and simultaneously slides with the guide rod 408. The guide rod 408 makes the guide block 406 slide more smoothly. The drive block 407 causes the two guide blocks 406 to drive the two limit rods 405 to slide towards each other, so that the limit rods 405 are no longer engaged with the connecting block 403. At this time, the top rod 401 can be removed from the connecting plate 402 for replacement. The two limit rods 405 are driven to slide simultaneously by the drive block 407, which facilitates quick replacement. The ejector rod 401 can be quickly disassembled and assembled, thereby improving the replacement efficiency. The drive block 407 is threadedly connected to the lead screw 409. The connecting plate 402 is driven by the second drive member 404. During demolding, the second drive member 404 (preferably a hydraulic rod) can be activated to drive the connecting plate 402 to move. When the connecting plate 402 moves, it will drive the ejector rod 401 to move. When the ejector rod 401 moves, it will push the formed workpiece out of the first mold 1, thereby completing the demolding. The second drive member 404 is installed on the first mold 1.

[0028] As a technical optimization of this utility model, the driving structure 3 includes a driving rod 301. The driving rod 301 is slidably connected to the first mold 1. The sliding rod 207 is fixedly connected to the driving rod 301. An mounting plate 303 is installed on the first mold 1. A rotating shaft 304 is rotatably connected to the mounting plate 303. A driving wheel 305 is fixedly connected to the rotating shaft 304. A cam groove 306 is provided on the driving wheel 305. A driving shaft 302 is rotatably connected to the driving rod 301. The driving shaft 302 rolls with the cam groove 306. A first driving component 307 is installed on the mounting plate 303. The first driving component 307 drives the rotating shaft 304 to rotate. When the rotating shaft 304 rotates, it drives the driving wheel 305 to rotate. When the driving wheel 305 rotates, the driving shaft 302 rolls with the cam groove 306. The 06 rolling engagement causes the drive shaft 302 to drive the drive rod 301 to move up and down. When the drive rod 301 moves up and down, it drives the slide rod 207 to move. When the slide rod 207 slides, it drives the piston 202 to move. The piston 202 applies pressure to the oil storage chamber 201, causing the lubricating oil to flow from the first one-way valve 203 to the oil groove 204. The lubricating oil in the oil groove 204 adheres to the ejector rod 401 and the first mold 1 as the ejector rod 401 moves. By lubricating the ejector rod 401, the friction between it and the mold can be effectively reduced, the gap can be slowed down, the molten metal can be prevented from entering the gap, and the ejection action can be ensured to be smooth, improving the quality of the die casting and extending the service life of the ejector rod 401 and the mold. The rotating shaft 304 is driven by the first drive component 307, and the second mold 5 is slidably connected to the first mold 1.

[0029] In use, this invention first heats the metal material to a molten state, then injects the molten metal into the pre-designed cavities of the first mold 1 and the second mold 5 at high pressure and speed through an injection mechanism. After the molten metal fills all the details in the cavities, it rapidly cools and solidifies under continuous pressure, ultimately forming a casting that perfectly matches the shape of the two mold cavities. After the casting solidifies, the mold is opened and the casting is removed, completing one die casting operation. During die casting production, the purity of the alloy liquid is strictly controlled, the injection parameters are optimized, and the mold cavities are regularly inspected for flaws to promptly repair minor cracks or wear. These measures reduce the formation of pinholes caused by material defects, gas residue, or stress concentration. During demolding, the second driving component 404 (preferably a hydraulic rod) can be activated. The second driving component 404 drives the connecting plate 402 to move. When the connecting plate 402 moves, it drives the ejector rod 401 to move. When the ejector rod 401 moves, it ejects the formed workpiece from the first mold 1, thus completing the demolding. When the ejector rod 401 needs to be replaced, an internal hex wrench can be inserted into the hexagonal groove on the lead screw 409. By rotating the lead screw 409, the thread drives the driving block 407 to slide. When the driving block 407 slides, the guide block 406 slides on the inclined surface of the driving block 407 and simultaneously slides with the guide rod 408. The guide rod 408 makes the guide block 406 slide more smoothly. The driving block 407 causes the two guide blocks 406 to drive the two limit rods 405 to slide towards each other, thus limiting the movement of the two limit rods 405. The positioning rod 405 is no longer engaged with the connecting block 403. At this time, the push rod 401 can be removed from the connecting plate 402 for replacement. The two limiting rods 405 are driven to slide simultaneously by the drive block 407, which facilitates quick disassembly and assembly of the push rod 401 during replacement, thereby improving replacement efficiency. When the push rod 401 needs lubrication, the first drive component 307 (preferably a motor) can be started. The first drive component 307 drives the rotating shaft 304 to rotate. When the rotating shaft 304 rotates, it drives the drive wheel 305 to rotate. When the drive wheel 305 rotates, the drive shaft 302 rolls in the cam groove 306, thereby causing the drive shaft 302 to drive the drive rod 301 to move up and down. When the drive rod 301 moves up and down, it drives the slide rod 207 to move. When the piston 202 moves, it applies pressure to the oil reservoir 201, causing lubricating oil to flow from the first one-way valve 203 into the oil sump 204. The lubricating oil in the oil sump 204 adheres to the ejector rod 401 and the first mold 1 as the ejector rod 401 moves. By lubricating the ejector rod 401, friction between it and the mold can be effectively reduced, the gap can be slowed down, and molten metal can be prevented from entering the gap. At the same time, it ensures smooth ejection, improves the quality of the die casting, and extends the service life of the ejector rod 401 and the mold. When the piston 202 moves upward, air enters the oil reservoir 201 from the second one-way valve 205 because the air inlet 206 is connected to the outside. When adding oil, simply unscrew the threaded cap to add lubricating oil to the oil reservoir 201.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A metal die-casting mold for preventing sand holes, comprising a first mold (1), characterized in that: The first mold (1) is provided with an ejection structure (4), the ejection structure (4) includes an ejector rod (401), the first mold (1) is provided with a lubrication structure (2), the lubrication structure (2) includes an oil storage chamber (201), the first mold (1) is provided with two oil storage chambers (201), a piston (202) is slidably connected in the oil storage chamber (201), the first mold (1) is equipped with two first one-way valves (203), the piston (202) is equipped with a second one-way valve (205), the first mold (1) is provided with an oil groove (204), a slide rod (207) is fixedly connected to the piston (202), the slide rod (207) is slidably connected to the first mold (1), the slide rod (207) is driven by a drive structure (3), and the first mold (1) is provided with an air inlet (206).

2. The metal die-casting mold for preventing sand holes according to claim 1, characterized in that: The first mold (1) has two push rods (401) slidably connected, and a connecting plate (402) is detachably connected between the two push rods (401). A connecting block (403) is fixedly connected to the push rod (401), and the connecting block (403) is slidably connected to the connecting plate (402).

3. The metal die-casting mold for preventing sand holes according to claim 2, characterized in that: Two limiting rods (405) are slidably connected inside the connecting plate (402), and the two limiting rods (405) are respectively engaged with the two connecting blocks (403).

4. The metal die-casting mold for preventing sand holes according to claim 3, characterized in that: A guide block (406) is fixedly connected to the limiting rod (405), and the guide block (406) is slidably connected to the connecting plate (402).

5. A metal die-casting mold for preventing sand holes according to claim 4, characterized in that: A drive block (407) is slidably connected inside the connecting plate (402), and a guide rod (408) is fixedly connected to the drive block (407).

6. The metal die-casting mold for preventing sand holes according to claim 5, characterized in that: The guide block (406) is slidably connected to the drive block (407), and the drive block (407) is provided with an inclined surface.

7. A metal die-casting mold for preventing sand holes according to claim 6, characterized in that: A lead screw (409) is rotatably connected inside the connecting plate (402), and the driving block (407) is threadedly connected to the lead screw (409). The connecting plate (402) is driven by a second driving member (404), which is mounted on the first mold (1).

8. The metal die-casting mold for preventing sand holes according to claim 1, characterized in that: The driving structure (3) includes a driving rod (301), which is slidably connected to the first mold (1), and the slide rod (207) is fixedly connected to the driving rod (301).

9. A metal die-casting mold for preventing sand holes according to claim 8, characterized in that: The first mold (1) is equipped with an mounting plate (303), and a rotating shaft (304) is rotatably connected to the mounting plate (303). A drive wheel (305) is fixedly connected to the rotating shaft (304), and a cam groove (306) is provided on the drive wheel (305). A drive shaft (302) is rotatably connected to the drive rod (301), and the drive shaft (302) is in rolling cooperation with the cam groove (306).

10. A metal die-casting mold for preventing sand holes according to claim 9, characterized in that: The mounting plate (303) is equipped with a first driving component (307), the rotating shaft (304) is driven by the first driving component (307), and a second mold (5) is slidably connected to the first mold (1).

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