A casting box for wear-resistant castings

Abstract

The present invention relates to the technical field of metal casting, and discloses a casting box for wear-resistant castings, which includes a guiding box. At the bottom of the guiding box, an injection mold that is hermetically combined up and down is fixedly installed, and a sealing cover that movably covers the top wall of the injection mold. At the top of the inner cavity of the guiding box, a mold opening and closing assembly is installed. The sealing cover connected to the bottom end thereof is controlled to move vertically along the slide rail on the side wall of the guiding box through the air pressure change of the mold opening and closing assembly. A transmission connection is carried out between the sealing cover and the injection mold through a diversion assembly. The injection mold is connected to a lubricating assembly installed on the outer wall of the guiding box; when the air pressure in the inner cavity of the bellows rises and causes it to extend downward, the pressing plate gradually contracts into the groove on the side wall of the sealing cover. When the sealing cover is aligned with the through hole on the side wall of the air guide pipe, the high-pressure air flow in the sealing cover is continuously introduced into the inner cavity of the gas collecting pipe through the butt-jointed through hole, air guide pipe, injection mold and air inlet pipe, and the flowing air flow exchanges heat with the molten metal in the molding cavity.

Description

Technical Field

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

[0002] A casting box for castings is a device specifically used for manufacturing castings, which plays a crucial role in the entire casting process. The design and structure of this box are both to meet the special requirements of the casting process to ensure the production of high-quality castings.

[0003] Casting boxes are usually made of materials with high temperature resistance and corrosion resistance, 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 helps with 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, relying solely on natural cooling to cool the casting has an unsatisfactory effect. This method not only prolongs the time for the casting to cool from a high temperature state to an operable temperature, but also correspondingly increases the overall duration of the casting cooling and forming process, directly affecting the efficiency of mass production of castings; in addition, during the casting process, the reciprocating opening and closing of the mold is a key step. However, during this frequent operation, it is easy to generate friction between the mold cover and the casting box body. Long-term friction will cause damage and deformation between the mold cover and the casting box body, which not only affects the service life of the mold, but also may pose a potential threat to the quality of the casting.

[0005] Therefore, there is an urgent need for a new casting box for wear-resistant castings, aiming to accelerate the cooling of the casting, improve the forming efficiency of the casting, and self-lubricate the casting mold to reduce the wear between the mold cover and the casting box body, thereby improving the production efficiency and quality of the casting. 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 of how to accelerate the cooling of the casting, improve the forming efficiency of the casting, and self-lubricate the casting mold to reduce the wear between the mold cover and the casting box body as described in the above background art.

[0007] The present invention provides the following technical solution: A casting box for wear-resistant castings, comprising a guiding box, at the bottom of the guiding box, an injection mold is fixedly installed and arranged with upper and lower seals combined, and a sealing cover is movably covered on the top wall of the injection mold. At the top of the inner cavity of the guiding box, a mold opening and closing assembly is installed. By the air pressure change of the mold opening and closing assembly, the sealing cover connected to its bottom end is controlled to move vertically along the slide rail on the side wall of the guiding box. A transmission connection is carried out between the sealing cover and the injection mold through a diversion assembly, and the injection mold is connected to a lubrication assembly installed on the outer wall of the guiding box;

[0008] The diversion assembly includes an air duct, a pressing plate and a transmission part. Among them, the air duct is fixedly installed on the top wall of the injection mold, and the air duct communicates with the inner cavity of the injection mold. The pressing plate is movably arranged in a groove on the side wall of the guiding box, and the pressing plate is in transmission connection with the air duct through the transmission part;

[0009] The transmission part includes a swing rod, a sliding block and a fixed block. Among them, the two ends of the swing rod are respectively movably connected with a sliding block and a fixed block through a rotating shaft. The sliding block is slidably arranged in a chute on the top wall of the injection mold, and the fixed block is fixedly connected to the pressing plate.

[0010] Further, the lubrication assembly includes a liquid collecting pipe, a gas collecting pipe, an elastic bottom pad, a piston piece, a liquid inlet valve, a liquid discharge valve, an air inlet pipe, an exhaust pipe and a liquid discharge pipe. Among them, the liquid collecting pipe and the gas collecting pipe are integrally injection-molded. An elastic bottom pad is elastically arranged at the bottom of the inner cavity of the liquid collecting pipe. A piston piece is movably arranged in the inner cavity of the gas collecting pipe. An oil collecting cavity is arranged between the elastic bottom pad and the liquid collecting pipe. The side wall of the liquid collecting pipe is provided with a liquid inlet valve and a liquid discharge valve connected to the oil collecting cavity. The liquid inlet valve is connected to an oil tank storing lubricating oil, and the liquid discharge valve is fixedly connected to a liquid discharge pipe extending to the slide rail.

[0011] Further, the side wall of the liquid collecting pipe is fixedly connected to 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.

[0012] Further, the mold opening and closing assembly includes a corrugated pipe, a connecting pipe, a reversible air pump and a carrier. Among them, both the upper and lower ends of the corrugated pipe are fixedly connected with a connecting pipe. The upper connecting pipe is communicated with the reversible air pump, and the lower connecting pipe is fixedly connected to the outer top wall of the sealing cover. The reversible air pump is installed on the top of the inner cavity of the guiding box through the carrier.

[0013] Further, the mold opening and closing assembly further includes a fixing frame and a coating brush plate. Among them, the coating brush plate is fixedly installed around the lower connecting pipe through the fixing frame, and the coating brush plate located above the sealing cover is always attached to the inner wall of the guiding box.

[0014] Further, through holes capable of being aligned and communicated are formed in the side wall of the groove of the air guide pipe and the sealing cover. When the sealing cover moves upward, the pressing plate in the groove on the side wall of the sealing cover gradually loses the extrusion of the side edge of the air guide pipe. Driven by the transmission part, the pressing plate slides outward along the groove on the side wall of the sealing cover, and the through holes on the side walls of the sealing cover and the air guide pipe are misaligned until the pressing plate closes the through holes, and the bellows and the sealing cover restore the sealed chamber.

[0015] Further, the inner cavities of the upper and lower injection molds are communicated, and the sealing cover can be hermetically covered on the top wall of the upper injection mold. A sealing bottom plate is detachably installed on the bottom wall of the lower injection mold.

[0016] Further, the outer contour of the sealing cover is a frustum of a pyramid, and its cross-sectional area gradually decreases from top to bottom. Grooves parallel to the ridge line are provided on the left and right side walls of the sealing cover, and a chamber communicated with the bellows is arranged inside the sealing cover.

[0017] The technical effects and advantages of the present invention:

[0018] By providing a diversion assembly, a mold opening and closing assembly and a lubrication assembly, the present invention is conducive to the increase of the air pressure in the inner cavity of the bellows and promotes its downward extension. At the same time, the pressing plate movably arranged in the groove on the side wall of the sealing cover touches and is extruded by the side edge of the air guide pipe, causing the pressing plate to gradually contract into the groove on the side wall of the sealing cover. Until the through holes on the side walls of the sealing cover and the air guide pipe are aligned, the high-pressure air flow in the sealing cover continuously enters the inner cavity of the gas collecting pipe through the butt-jointed through holes, the air guide pipe, the injection mold and the air inlet pipe, pressurizing the inner cavity of the gas collecting pipe. At the same time, the flowing air flow exchanges heat with the molten metal in the forming cavity. At the same time, the high-pressure heat flow pushes the piston piece upward to press the elastic bottom pad and the oil collecting cavity, so that the lubricating oil in the oil collecting cavity is injected into the slide rail through the drain valve to perform an oil spraying lubrication operation on the surface of the slide rail. Until the piston piece moves to the upper layer of the exhaust pipe and does not completely block the exhaust pipe, the piston piece hovers at this position, and the oil collecting cavity stops spraying oil to the slide rail due to constant pressure. And the high-pressure heat flow in the inner cavity of the gas collecting pipe jets air into the slide rail through the unobstructed exhaust pipe to dry the lubricating oil sprayed in the slide rail. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure and its partial cross-section of the present invention.

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in

[0022] Figure 4 It is a schematic diagram of the connection structure of the injection mold, the sealing cover, the diversion assembly and the mold opening and closing assembly of the present invention.

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at position B in

[0024] Figure 6 Schematic diagram of the connection structure of the injection mold, the sealing cover and the diversion component of the present invention

[0025] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at position C in

[0026] Reference numerals are: 1, guide box; 101, slide rail; 2, injection mold; 3, sealing cover; 4, diversion component; 401, air duct; 402, pressing plate; 403, transmission part; 4031, swing rod; 4032, sliding block; 4033, fixed block; 5, mold opening and closing component; 501, corrugated pipe; 502, connecting pipe; 503, reversible air pump; 504, carrier; 505, fixed frame; 506, coating brush plate; 6, lubrication component; 601, liquid collecting pipe; 602, gas collecting pipe; 603, elastic bottom pad; 604, piston piece; 605, liquid inlet valve; 606, liquid discharge valve; 607, air inlet pipe; 608, exhaust pipe; 609, liquid discharge pipe Detailed implementation manners

[0027] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and a casting box for wear-resistant castings involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention

[0028] Referring to Figures 1-7 , the present invention provides a casting box for wear-resistant castings, including a guide box 1, a bottom of the guide box 1 is fixedly installed with an injection mold 2 arranged with upper and lower seals combined, and a sealing cover 3 movably covering the top wall of the injection mold 2. A mold opening and closing component 5 is installed at the top of the inner cavity of the guide box 1. The sealing cover 3 connected to the bottom end thereof is controlled to vertically move along the slide rail 101 on the side wall of the guide box 1 through the air pressure change of the mold opening and closing component 5. A transmission connection is carried out between the sealing cover 3 and the injection mold 2 through a diversion component 4, and the injection mold 2 is connected to a lubrication component 6 installed on the outer wall of the guide box 1

[0029] In this embodiment, it should be specifically noted that the inner cavities of the upper and lower injection molds 2 are communicated, and the sealing cover 3 can be hermetically covered on the top wall of the upper injection mold 2. A sealing bottom plate is detachably installed on the bottom wall of the lower injection mold 2

[0030] The outer contour of the sealing cover 3 is a frustum of a pyramid, and its cross-sectional area gradually decreases from top to bottom. Grooves parallel to the ridge lines are provided on the left and right side walls of the sealing cover 3, and a chamber communicating with the bellows 501 is arranged inside the sealing cover 3.

[0031] Referring to Figures 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. Both the upper and lower ends of the bellows 501 are fixedly connected with a connecting pipe 502. The upper connecting pipe 502 is communicated with the reversible air pump 503, and the lower connecting pipe 502 is fixedly connected with the outer top wall of the sealing cover 3. The reversible air pump 503 is installed at the top of the inner cavity of the guiding box 1 through the carrier 504;

[0032] The die opening and closing assembly 5 further includes a fixing frame 505 and a coating brush plate 506. The coating brush plate 506 is fixedly installed around the lower connecting pipe 502 through the fixing frame 505, and the coating brush plate 506 located above the sealing cover 3 is always attached to the inner wall of the guiding box 1.

[0033] Referring to Figures 4-7 , the diversion assembly 4 includes an air guide pipe 401, a pressing plate 402 and a transmission part 403. The air guide pipe 401 is fixedly installed on the top wall of the injection mold 2, and the air guide pipe 401 is communicated with the inner cavity of the injection mold 2. The pressing plate 402 is movably arranged in the groove on the side wall of the guiding box 1, and the pressing plate 402 is in transmission connection with the air guide pipe 401 through the transmission part 403;

[0034] The transmission part 403 includes a swing rod 4031, a sliding block 4032 and a fixed block 4033. The two ends of the swing rod 4031 are respectively movably connected with a sliding block 4032 and a fixed block 4033 through a rotating shaft. The sliding block 4032 is slidably arranged in the chute on the top wall of the injection mold 2, and the fixed block 4033 is fixedly connected with the pressing plate 402.

[0035] In this embodiment, it should be specifically noted that through holes capable of being aligned and communicated are provided on the side wall of the groove of the air guide pipe 401 and the sealing cover 3. When the sealing cover 3 moves upward, the pressing plate 402 in the groove on the side wall of the sealing cover 3 gradually loses the extrusion of the side edge of the air guide pipe 401. Driven by the transmission part 403, the pressing plate 402 slides outwards along the groove on the side wall of the sealing cover 3, and the through holes on the side walls of the sealing cover 3 and the air guide pipe 401 are misaligned until the pressing plate 402 closes the through holes, and the bellows 501 and the sealing cover 3 restore the sealed chamber.

[0036] Referring to Figures 1-3, the lubrication assembly 6 includes a liquid collecting pipe 601, a gas collecting pipe 602, an elastic bottom pad 603, a piston sheet 604, a liquid inlet valve 605, a liquid discharge valve 606, an air inlet pipe 607, an exhaust pipe 608 and a liquid discharge pipe 609. The liquid collecting pipe 601 and the gas 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 sheet 604 is movably arranged in the inner cavity of the gas collecting pipe 602. An oil collecting cavity is arranged between the elastic bottom pad 603 and the liquid collecting pipe 601. The side wall of the liquid collecting pipe 601 is provided with a liquid inlet valve 605 and a liquid discharge valve 606 connected to the oil collecting cavity. The liquid inlet valve 605 is connected to an oil tank storing lubricating oil. The liquid discharge valve 606 is fixedly connected to a liquid discharge pipe 609 extending to the slide rail 101;

[0037] The side wall of the liquid collecting pipe 601 is fixedly connected to an exhaust pipe 608 extending to the slide rail 101. The air inlet of the exhaust pipe 608 is opened near the upper edge opening of the elastic bottom pad 603.

[0038] The working principle of the present invention:

[0039] Inject metal melt into the molding cavity formed by enclosing the upper and lower injection molds 2 from the injection port. When the injection amount in the molding cavity reaches the predetermined capacity and the injection is completed, the reversible air pump 503 can extract external air and continuously inject it into the sealed chamber of the bellows 501 and the sealing cover 3, so that the air pressure in the inner cavity of the bellows 501 increases and causes it to extend downward. Then, the bellows 501 drives the coating brush plate 506 and the sealing cover 3 to move downward through the fixing frame 505. At the same time, the pressing plate 402 movably arranged in the groove on the side wall of the sealing cover 3 touches and is squeezed by the side edge of the air guide pipe 401. This squeezing force is proportional to the descending depth of the sealing cover 3, causing the pressing plate 402 to gradually contract into the groove on the side wall of the sealing cover 3 until the sealing cover 3 is aligned with the through hole on the side wall of the air guide pipe 401. Then, the high-pressure air flow in the sealing cover 3 is continuously introduced into the inner cavity of the gas collecting pipe 602 through the butt-jointed through hole, the air guide pipe 401, the injection mold 2 and the air inlet pipe 607 to pressurize the inner cavity of the gas collecting pipe 602. The flowing air flow exchanges heat with the metal melt in the molding cavity to reduce the temperature of the metal melt and accelerate cooling and molding;

[0040] As the air pressure in the inner cavity of the gas collecting pipe 602 increases, the high-pressure heat flow pushes the piston piece 604 upward and presses the elastic bottom pad 603, gradually compressing the oil collecting cavity between the elastic bottom pad 603 and the liquid collecting pipe 601, prompting the lubricating oil in the oil collecting cavity to be injected into the slide rail 101 through the drain valve 606 to perform oil spraying lubrication on the surface of the slide rail 101. Until the piston piece 604 moves to the upper layer of the exhaust pipe 608 and does not completely block the exhaust pipe 608, the piston piece 604 hovers at this position, the oil collecting cavity is at a constant pressure and stops spraying oil on the slide rail 101, and the high-pressure heat flow in the inner cavity of the gas collecting pipe 602 jets air into the slide rail 101 through the unblocked exhaust pipe 608 to dry the lubricating oil sprayed in the slide rail 101, enabling an oil film to be 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;

[0041] When the casting is formed, the reversible air pump 503 can switch the air suction direction, and the air pressure in the bellows 501, the sealing cover 3, the butt joint through holes, the air guide pipe 401, the injection mold 2, the air inlet pipe 607 and the gas collecting pipe 602 channels is discharged outward by the reversible air pump 503. Then the piston piece 604 retracts downward to block the exhaust path of the exhaust pipe 608. At the same time, the elastic bottom pad 603 rebounds downward to expand the oil collecting cavity, forming an instantaneous negative pressure and extracting the lubricating oil in the fuel tank as a supplement through the liquid inlet valve 605. As the gas in the inner cavity of the bellows 501 continuously leaks and its air pressure decreases, the bellows 501 drives the smear brush plate 506 and the sealing cover 3 to move upward through the fixing frame 505. At the same time, the pressing plate 402 in the side wall groove of the sealing cover 3 gradually loses the extrusion of the side edge of the air guide pipe 401, and the pressing plate 402 slides outward along the groove of the side wall of the sealing cover 3 under the traction of the transmission part 403, and the through hole on the side wall of the sealing cover 3 and the air guide pipe 401 are misaligned until the pressing 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, finally the sealing cover 3 disengages from above the injection mold 2, and the smear brush plate 506 that absorbs the oil liquid oils the inner wall of the guiding box 1 until the main material port is opened for the next round of casting.

[0042] 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 person skilled in the art within the technical scope disclosed by the present invention; equivalent substitutions or modifications are made according to the technical plan and its improvement concept of the present invention, and these should all 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) sealed and combined with an upper and a lower sealing member, and a sealing cover (3) movably covering 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 the bottom end thereof is controlled to move vertically along a slide rail (101) on the side wall of the guide box (1) by changes in air pressure of the die opening and closing assembly (5); the sealing cover (3) and the injection mold (2) are connected in transmission 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 air 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), and the pressure plate (402) is in transmission connection with the air guide tube (401) via the transmission part (403); The transmission part (403) comprises 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) via a rotating shaft, respectively, wherein the sliding block (4032) is slidably disposed in a sliding groove on the top wall of the air guide tube (401), and the fixed block (4033) is fixedly connected to the pressure plate (402); 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), 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 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, and the pressing plate (402) is movably arranged in the groove of the side wall of the sealing cover (3). When the sealing cover (3) moves upward, the pressing 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), and the pressing plate (402) slides outward along the groove of the side wall of the sealing cover (3) under the influence of the transmission part (403), and the through holes of the side wall of the sealing cover (3) and the air guide tube (401) are misaligned until the pressing plate (402) closes the through holes, and the bellows (501) and the sealing cover (3) restore the inner cavity sealing state of the injection mold (2).

2. A casting box for wear-resistant castings according to claim 1, characterized in that: The lubrication 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 exhaust 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 the bottom of the inner cavity of the liquid collecting pipe (601) is elastically provided with an elastic bottom pad (603). 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); 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. A 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 the exhaust pipe (608) has an air inlet close to the upper edge opening of the elastic base pad (603).

4. A casting box for wear-resistant castings according to claim 3, 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).

5. The casting box for wear-resistant castings according to claim 1, characterized in that: The inner cavities of the injection moulds (2) which are sealed and combined with each other at the top and bottom are connected, and the sealing cover (3) can be sealed and covered on the top wall of the upper injection mould (2), and the bottom wall of the lower injection mould (2) is detachably provided with a sealing bottom plate.

6. 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 line. The interior of the sealing cover (3) is provided with a chamber that is connected to the bellows (501).

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