Casting box for wear-resistant casting parts

Abstract

The invention relates to the technical field of metal casting, and discloses a casting box for wear-resistant casting parts, which comprises a guide box, an injection mold and a sealing cover movably covering the top wall of the injection mold are fixedly mounted at the bottom of the guide box, the injection mold is vertically sealed and combined, and a mold opening opening and closing assembly is mounted at the top of an inner cavity of the guide box. A sealing cover connected with the bottom end of the mold opening opening and closing assembly is controlled to vertically move along a sliding rail on the side wall of the guide box through the air pressure change of the mold opening opening and closing assembly, the sealing cover and the injection mold are in transmission connection through a flow guide assembly, and the injection mold is connected with a lubricating assembly installed on the outer wall of the guide box; the air pressure in the inner cavity of the corrugated pipe is increased to promote the corrugated pipe to extend downwards, the pressing plate is gradually condensed into the groove in the side wall of the sealing cover until the sealing cover is aligned with the through hole in the side wall of the air guide pipe, and high-pressure air flow in the sealing cover passes through the butted through hole, the air guide pipe, the injection mold and the air inlet pipe and then is continuously guided into the inner cavity of the air collecting pipe; and the circulating air flow exchanges heat with the molten metal in the forming cavity.

Description

Technical Field

[0001] The invention relates to the technical field of metal casting, and more particularly to a casting box for wear-resistant castings. Background Art

[0002] The casting box for castings is a kind of equipment specially used for manufacturing castings. It plays a vital role in the whole casting process. The design and structure of this box are to meet the special needs of the casting process to ensure the production of high-quality castings.

[0003] The casting box is usually made of high temperature and corrosion resistant materials, such as cast iron, cast steel or other alloy materials to withstand the high temperature and chemical erosion during the casting process. The inside of the box is usually coated with a special coating to prevent the casting from sticking to the box, and also to facilitate the cooling and demolding of the casting. During the casting process, the casting box is first filled with molten metal or other materials, and then allowed to cool and solidify naturally. Once the casting is completely cooled and solidified, it can be removed from the casting box. This process requires precise temperature control and time management to ensure the quality of the casting. The size and shape of the casting box can be adjusted according to the size and shape of the casting to be manufactured.

[0004] However, the effect of cooling the castings by natural cooling alone is not ideal. This method not only prolongs the time for the castings to drop from a high temperature state to an operable temperature, but also increases the overall cooling and molding time of the castings, which directly affects the efficiency of mass production of castings. In addition, in the casting process, the reciprocating opening and closing of the mold is a key step. However, during this frequent action, friction is easily generated between the mold cover and the casting box. Long-term friction can cause damage and deformation between the mold cover or the casting box, which not only affects the service life of the mold, but may also pose a potential threat to the quality of the castings.

[0005] Therefore, there is an urgent need for a new casting box for wear-resistant castings, which is intended to accelerate the cooling of the castings, improve the casting molding efficiency, and self-lubricate the casting mold, reduce the wear between the mold cover or the casting box, so as to improve the production efficiency and quality of the castings. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a casting box for wear-resistant castings to solve the problems existing in the above-mentioned background technology of how to accelerate the cooling of castings, improve the molding efficiency of castings, and self-lubricate the casting mold to reduce the wear between the mold cover or the casting box body.

[0007] The present invention provides the following technical solution: a casting box for wear-resistant castings, comprising a guide box, an injection mold with upper and lower sealing arrangements fixedly mounted on the bottom of the guide box, and a sealing cover movably covering the top wall of the injection mold, a die opening and closing assembly mounted on the top of the inner cavity of the guide box, the sealing cover connected to the bottom end thereof is controlled to move vertically along a slide rail on the side wall of the guide box by the air pressure change of the die opening and closing assembly, the sealing cover and the injection mold are connected in a transmission manner through a guide assembly, and the injection mold is connected to a lubrication assembly mounted on the outer wall of the guide box; The air guide assembly includes an air guide tube, a pressure plate and a transmission part, wherein the air guide tube is fixedly installed on the top wall of the injection mold, and the air guide tube is communicated with the inner cavity of the injection mold, the pressure plate is movably arranged in the groove of the side wall of the guide box, and the pressure plate is transmission-connected with the air guide tube through the transmission part; The transmission part includes a swing rod, a sliding block and a fixed block, wherein the two ends of the swing rod are movably connected to the sliding block and the fixed block through a rotating shaft, wherein the sliding block is slidably set in a sliding groove on the top wall of the injection mold, and the fixed block is fixedly connected to the pressure plate.

[0008] Furthermore, the lubrication assembly includes a liquid collecting pipe, an air collecting pipe, an elastic bottom pad, a piston plate, an inlet valve, a drain valve, an air inlet pipe, an exhaust pipe and a drain pipe, wherein the liquid collecting pipe and the air collecting pipe are integrally injection molded, an elastic bottom pad is elastically provided at the bottom of the inner cavity of the liquid collecting pipe, a piston plate is movably provided in the inner cavity of the air collecting pipe, an oil collecting cavity is provided between the elastic bottom pad and the liquid collecting pipe, a liquid inlet valve and a drain valve connected to the oil collecting cavity are installed on the side wall of the liquid collecting pipe, the liquid inlet valve is connected to an oil tank for storing lubricating oil, and the drain valve is fixedly connected to a drain pipe extending to the slide rail.

[0009] Furthermore, the side wall of the collecting pipe is fixedly connected with an exhaust pipe extending to the slide rail, and the air inlet of the exhaust pipe is close to the upper edge opening of the elastic bottom pad.

[0010] Furthermore, the mold opening and closing assembly includes a bellows, a connecting pipe, a reversible air pump and a carrier, wherein the upper and lower ends of the bellows are fixedly connected with connecting pipes, the upper connecting pipe is connected to the reversible air pump, and the lower connecting pipe is fixedly connected to the outer top wall of the sealing cover, and the reversible air pump is installed on the top of the inner cavity of the guide box through the carrier.

[0011] Furthermore, the die opening and closing assembly also includes a fixing frame and a smear brush plate, wherein the smear brush plate is fixedly mounted on the periphery of the lower connecting tube via the fixing frame, and the smear brush plate located above the sealing cover is always attached to the inner wall of the guide box.

[0012] Furthermore, the side walls of the grooves of the air duct and the sealing cover are provided with through holes that can be aligned and connected. When the sealing cover moves upward, the pressure plate in the groove of the side wall of the sealing cover gradually loses the squeezing of the side edge of the air duct, and the pressure plate slides outward along the groove of the side wall of the sealing cover under the pull of the transmission part. The sealing cover and the through hole of the side wall of the air duct are misaligned until the pressure plate closes the through hole, and the bellows and the sealing cover restore the sealed chamber.

[0013] Furthermore, the inner cavities of the upper and lower injection molds are connected, and the sealing cover can be sealed on the top wall of the upper injection mold, and the bottom wall of the lower injection mold is detachably mounted with a sealing bottom plate.

[0014] Furthermore, the outer contour of the sealing cover is a prism, and its cross-sectional area gradually decreases from top to bottom. The left and right side walls of the sealing cover are provided with grooves parallel to the ridge line, and the interior of the sealing cover is provided with a chamber connected to the bellows.

[0015] Technical effects and advantages of the present invention: The present invention is provided with a flow guide component, a die opening and closing component and a lubrication component, which is conducive to increasing the air pressure in the inner cavity of the bellows and causing it to extend downward. At the same time, a pressure plate movably arranged in the groove of the side wall of the sealing cover touches and is squeezed by the side edge of the air guide pipe, so that the pressure plate gradually shrinks into the groove of the side wall of the sealing cover until the sealing cover is aligned with the through hole of the side wall of the air guide pipe. The high-pressure airflow in the sealing cover is continuously introduced into the inner cavity of the air collecting pipe through the butted through hole, the air guide pipe, the injection mold and the air inlet pipe, and the inner cavity of the air collecting pipe is pressurized, and the circulating airflow Heat is exchanged with the molten metal in the forming cavity. At the same time, the high-pressure heat flow pushes the piston plate to move upward and presses the elastic base pad and the oil collecting chamber, so that the lubricating oil in the oil collecting chamber is injected into the slide rail through the drain valve, and the surface of the slide rail is sprayed with oil for lubrication. Until the piston plate moves to the upper layer of the exhaust pipe without completely blocking the exhaust pipe, the piston plate hovers at this position, the oil collecting chamber maintains a constant pressure and stops spraying oil to the slide rail, while the high-pressure heat flow in the inner cavity of the air collecting pipe sprays into the slide rail through the unobstructed exhaust pipe to dry the lubricating oil sprayed on the slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention and its partial cross-section.

[0018] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle.

[0019] Figure 4 It is a schematic diagram of the connection structure of the injection mold, the sealing cover, the flow guide component and the mold opening and closing component of the present invention.

[0020] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point B in the middle.

[0021] Figure 6 It is a schematic diagram of the connection structure of the injection mold, the sealing cover and the guide assembly of the present invention.

[0022] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point C in the middle.

[0023] The accompanying drawings are marked as follows: 1. Guide box; 101. Slide rail; 2. Injection mold; 3. Sealing cover; 4. Guide assembly; 401. Air guide pipe; 402. Pressure plate; 403. Transmission part; 4031. Swing rod; 4032. Sliding block; 4033. Fixed block; 5. Mold opening and closing assembly; 501. Bellows; 502. Connecting pipe; 503. Reversible air pump; 504. Loading rack; 505. Fixed rack; 506. Applicator brush plate; 6. Lubrication assembly; 601. Liquid collecting pipe; 602. Gas collecting pipe; 603. Elastic bottom pad; 604. Piston plate; 605. Liquid inlet valve; 606. Liquid discharge valve; 607. Inlet pipe; 608. Exhaust pipe; 609. Liquid discharge pipe. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The casting box for a wear-resistant casting involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0025] Reference Figure 1-7 The present invention provides a casting box for wear-resistant castings, including a guide box 1, an injection mold 2 with upper and lower sealing arrangements fixedly installed at the bottom of the guide box 1, and a sealing cover 3 movably covering the top wall of the injection mold 2, a mold opening and closing assembly 5 is installed at the top of the inner cavity of the guide box 1, and the sealing cover 3 connected to its bottom end is controlled to move vertically along a slide rail 101 on the side wall of the guide box 1 through the air pressure change of the mold opening and closing assembly 5, the sealing cover 3 and the injection mold 2 are connected by a transmission connection through a guide assembly 4, and the injection mold 2 is connected to a lubrication assembly 6 installed on the outer wall of the guide box 1.

[0026] In this embodiment, it should be specifically explained that the inner cavities of the upper and lower injection molds 2 are connected, and the sealing cover 3 can be sealed on the top wall of the upper injection mold 2, and the bottom wall of the lower injection mold 2 is detachably installed with a sealing bottom plate; The outer contour of the sealing cover 3 is a prism, and its cross-sectional area gradually decreases from top to bottom. The left and right side walls of the sealing cover 3 are provided with grooves parallel to the ridge line. The interior of the sealing cover 3 is provided with a chamber connected to the bellows 501.

[0027] Reference Figure 1-4 The die opening and closing assembly 5 includes a bellows 501, a connecting pipe 502, a reversible air pump 503 and a carrier 504, wherein the upper and lower ends of the bellows 501 are fixedly connected with connecting pipes 502, the upper connecting pipe 502 is connected to the reversible air pump 503, the lower connecting pipe 502 is fixedly connected to the outer top wall of the sealing cover 3, and the reversible air pump 503 is installed on the top of the inner cavity of the guide box 1 through the carrier 504; The die opening and closing assembly 5 also includes a fixing frame 505 and a smear brush plate 506 , wherein the smear brush plate 506 is fixedly installed on the periphery of the lower connecting pipe 502 through the fixing frame 505 , and the smear brush plate 506 located above the sealing cover 3 is always attached to the inner wall of the guide box 1 .

[0028] Reference Figure 4-7 The air guide assembly 4 includes an air guide tube 401, a pressure plate 402 and a transmission part 403, wherein the air guide tube 401 is fixedly mounted on the top wall of the injection mold 2, and the air guide tube 401 is communicated with the inner cavity of the injection mold 2, the pressure plate 402 is movably arranged in the groove of the side wall of the guide box 1, and the pressure plate 402 is transmission-connected with the air guide tube 401 through the transmission part 403; The transmission part 403 includes a swing rod 4031, a sliding block 4032 and a fixed block 4033, wherein the two ends of the swing rod 4031 are movably connected to the sliding block 4032 and the fixed block 4033 through a rotating shaft, wherein the sliding block 4032 is slidably set in the slide groove of the top wall of the injection mold 2, and the fixed block 4033 is fixedly connected to the pressure plate 402.

[0029] In the present embodiment, it is necessary to specifically explain that the side walls of the grooves of the air duct 401 and the sealing cover 3 are provided with through holes that can be aligned and connected. When the sealing cover 3 moves upward, the pressure plate 402 in the groove of the side wall of the sealing cover 3 gradually loses the squeezing of the side edge of the air duct 401. The pressure plate 402 slides outward along the groove of the side wall of the sealing cover 3 under the pull of the transmission part 403. The sealing cover 3 and the through hole of the side wall of the air duct 401 are misaligned until the pressure plate 402 closes the through hole, and the bellows 501 and the sealing cover 3 restore the sealed chamber.

[0030] Reference Figure 1-3The lubrication assembly 6 includes a liquid collecting pipe 601, an air collecting pipe 602, an elastic bottom pad 603, a piston plate 604, a liquid inlet valve 605, a liquid discharge valve 606, an air inlet pipe 607, an air discharge pipe 608 and a liquid discharge pipe 609, wherein the liquid collecting pipe 601 and the air collecting pipe 602 are integrally injection molded, an elastic bottom pad 603 is elastically arranged at the bottom of the inner cavity of the liquid collecting pipe 601, a piston plate 604 is movably arranged in the inner cavity of the air collecting pipe 602, an oil collecting cavity is arranged between the elastic bottom pad 603 and the liquid collecting pipe 601, a liquid inlet valve 605 and a liquid discharge valve 606 connected to the oil collecting cavity are installed on the side wall of the liquid collecting pipe 601, the liquid inlet valve 605 is connected to an oil tank storing lubricating oil, and the liquid discharge valve 606 is fixedly connected to a liquid discharge pipe 609 extending to the slide rail 101; An exhaust pipe 608 extending to the slide rail 101 is fixedly connected to the side wall of the liquid collecting pipe 601 , and an air inlet of the exhaust pipe 608 is close to the upper edge opening of the elastic bottom pad 603 .

[0031] Working principle of the present invention: The metal melt is injected into the molding cavity formed by the upper and lower injection molds 2 through the injection port. When the injection amount in the molding cavity reaches the predetermined capacity, the reversible air pump 503 extracts the outside air and continuously injects it into the sealed cavity of the bellows 501 and the sealing cover 3, so that the air pressure in the cavity of the bellows 501 increases and causes it to extend downward. Then the bellows 501 drives the smear brush plate 506 and the sealing cover 3 to move downward through the fixing frame 505. At the same time, the pressure plate 402 movably arranged in the groove of the side wall of the sealing cover 3 touches and is squeezed by the side edge of the air guide tube 401. The force is proportional to the depth of the sealing cover 3 descending, so that the pressing plate 402 gradually shrinks into the groove of the side wall of the sealing cover 3 until the sealing cover 3 is aligned with the through hole of the side wall of the air guide pipe 401. Then, the sealing cover 3 and the inner cavity of the injection mold 2 are connected by the air guide pipe 401, and then the high-pressure airflow in the sealing cover 3 is continuously introduced into the inner cavity of the air collecting pipe 602 through the docking through hole, the air guide pipe 401, the injection mold 2 and the air inlet pipe 607, and the inner cavity of the air collecting pipe 602 is pressurized. The circulating airflow exchanges heat with the molten metal in the molding cavity, reduces the temperature of the molten metal, and accelerates cooling and molding; As the air pressure in the inner cavity of the gas collecting pipe 602 increases, the high-pressure heat flow pushes the piston plate 604 to move upward and press the elastic bottom pad 603, gradually compressing the oil collecting chamber between the elastic bottom pad 603 and the collecting pipe 601, causing the lubricating oil in the oil collecting chamber to be injected into the slide rail 101 through the drain valve 606, and performing oil spraying and lubricating operation on the surface of the slide rail 101 until the piston plate 604 moves to the upper layer of the exhaust pipe 608 without completely blocking the exhaust pipe 608, the piston plate 604 hovers at this position, the oil collecting chamber is at a constant pressure and stops spraying oil into the slide rail 101, and the high-pressure heat flow in the inner cavity of the gas collecting pipe 602 sprays into the slide rail 101 through the unobstructed exhaust pipe 608, drying the lubricating oil sprayed into the slide rail 101, so that an oil film is quickly formed on the surface of the slide rail 101, and part of the lubricating oil is adsorbed by the smear brush plate 506 under the blowing of the heat flow; After the casting is formed, the reversible air pump 503 switches the air suction direction, and the reversible air pump 503 discharges the air pressure in the bellows 501, the sealing cover 3, the docking through hole, the air guide pipe 401, the injection mold 2, the air intake pipe 607 and the air collecting pipe 602. The piston plate 604 retracts downward to close the exhaust path of the exhaust pipe 608. At the same time, the elastic base pad 603 rebounds downward to expand the oil collecting cavity, forming an instantaneous negative pressure and drawing the lubricating oil in the oil tank through the liquid inlet valve 605 as a supply. As the gas in the inner cavity of the bellows 501 continues to lose, its air pressure decreases, and the bellows 501 drives the coating through the fixing frame 505. The brush plate 506 and the sealing cover 3 move upward. At the same time, the pressure plate 402 in the groove of the side wall of the sealing cover 3 gradually loses the squeeze of the side edge of the air guide tube 401. The pressure plate 402 slides outward along the groove of the side wall of the sealing cover 3 under the pull of the transmission part 403. The sealing cover 3 and the through hole of the side wall of the air guide tube 401 are misaligned until the pressure plate 402 closes the through hole, and the bellows 501 and the sealing cover 3 restore the sealed chamber. Under the continuous pressure relief of the reversible air pump 503, the sealing cover 3 is finally separated from the top of the injection mold 2, and the brush plate 506 that absorbs the oil oils the inner wall of the guide box 1 until the main material port is opened to wait for the next round of casting.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or modifications within the technical scope disclosed by the present invention; according to the technical plan and its improved conception of the present invention, all of which should be included under the protection of the present invention.

Claims

1. A casting box for wear-resistant castings, comprising a guide box (1), characterized in that: The bottom of the guide box (1) is fixedly mounted with an injection mold (2) with upper and lower sealing arrangements, and a sealing cover (3) that is movably covered on the top wall of the injection mold (2); a die opening and closing assembly (5) is mounted on the top of the inner cavity of the guide box (1); the sealing cover (3) connected to its bottom end is controlled to move vertically along a slide rail (101) on the side wall of the guide box (1) by the air pressure change of the die opening and closing assembly (5); the sealing cover (3) and the injection mold (2) are connected in a transmission manner via a flow guide assembly (4); and the injection mold (2) is connected to a lubrication assembly (6) mounted on the outer wall of the guide box (1); The guide assembly (4) comprises an air guide tube (401), a pressure plate (402) and a transmission part (403), wherein the air guide tube (401) is fixedly mounted on the top wall of the injection mold (2), and the air guide tube (401) is in communication with the inner cavity of the injection mold (2); the pressure plate (402) is movably arranged in a groove on the side wall of the guide box (1); and the pressure plate (402) is transmission-connected to the air guide tube (401) via the transmission part (403); The transmission part (403) comprises a swinging rod (4031), a sliding block (4032) and a fixed block (4033), wherein the two ends of the swinging rod (4031) are movably connected to the sliding block (4032) and the fixed block (4033) via a rotating shaft, wherein the sliding block (4032) is slidably arranged in a slide groove of the top wall of the injection mold (2), and the fixed block (4033) is fixedly connected to the pressure plate (402).

2. The casting box for wear-resistant castings according to claim 1, characterized in that: The lubricating assembly (6) comprises a liquid collecting pipe (601), an air collecting pipe (602), an elastic bottom pad (603), a piston plate (604), a liquid inlet valve (605), a liquid discharge valve (606), an air inlet pipe (607), an air discharge pipe (608) and a liquid discharge pipe (609), wherein the liquid collecting pipe (601) and the air collecting pipe (602) are integrally injection-molded, and an elastic bottom pad (603) is elastically provided at the bottom of the inner cavity of the liquid collecting pipe (601). A piston plate (604) is movably arranged in the inner cavity of the gas collecting pipe (602), an oil collecting cavity is arranged between the elastic base pad (603) and the liquid collecting pipe (601), and a liquid inlet valve (605) and a liquid discharge valve (606) connected to the oil collecting cavity are installed on the side wall of the liquid collecting pipe (601). The liquid inlet valve (605) is connected to an oil tank storing lubricating oil, and the liquid discharge valve (606) is fixedly connected to a liquid discharge pipe (609) extending to the slide rail (101).

3. The casting box for wear-resistant castings according to claim 2, characterized in that: An exhaust pipe (608) extending to the slide rail (101) is fixedly connected to the side wall of the liquid collecting pipe (601), and an air inlet of the exhaust pipe (608) is close to the upper edge opening of the elastic bottom pad (603).

4. The casting box for wear-resistant castings according to claim 1, characterized in that: The die opening and closing assembly (5) comprises a bellows (501), a connecting pipe (502), a reversible air pump (503) and a carrier (504), wherein the upper and lower ends of the bellows (501) are fixedly connected to the connecting pipes (502), the upper connecting pipe (502) is connected to the reversible air pump (503), and the lower connecting pipe (502) is fixedly connected to the outer top wall of the sealing cover (3), and the reversible air pump (503) is installed on the top of the inner cavity of the guide box (1) through the carrier (504).

5. The casting box for wear-resistant castings according to claim 4, characterized in that: The die opening and closing assembly (5) further comprises a fixing frame (505) and a smear brush plate (506), wherein the smear brush plate (506) is fixedly mounted on the periphery of the lower connecting pipe (502) via the fixing frame (505), and the smear brush plate (506) located above the sealing cover (3) is always attached to the inner wall of the guide box (1).

6. The casting box for wear-resistant castings according to claim 5, characterized in that: The side walls of the grooves of the air guide tube (401) and the sealing cover (3) are provided with through holes that can be aligned and connected. When the sealing cover (3) moves upward, the pressure plate (402) in the groove of the side wall of the sealing cover (3) gradually loses the squeezing of the side edge of the air guide tube (401). The pressure plate (402) slides outward along the groove of the side wall of the sealing cover (3) under the pull of the transmission part (403). The through holes of the side wall of the sealing cover (3) and the air guide tube (401) are misaligned until the pressure plate (402) closes the through holes, and the bellows (501) and the sealing cover (3) restore the sealed chamber.

7. The casting box for wear-resistant castings according to claim 1, characterized in that: The inner cavities of the upper and lower injection molds (2) are connected, and the sealing cover (3) can be sealed and covered on the top wall of the upper injection mold (2), and the bottom wall of the lower injection mold (2) is detachably mounted with a sealing bottom plate.

8. The casting box for wear-resistant castings according to claim 1, characterized in that: The outer contour of the sealing cover (3) is a prism, and its cross-sectional area gradually decreases from top to bottom. The left and right side walls of the sealing cover (3) are provided with grooves parallel to the ridge lines. The interior of the sealing cover (3) is provided with a chamber that is connected to the bellows (501).

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