A demolding device for precision casting

Abstract

This invention provides a demolding device for precision casting, belonging to the field of precision casting technology. It includes a mold base, a liquid storage cylinder, a pusher assembly, a liquid supply assembly, and a liquid return assembly. The mold base has a mold cavity at its upper part. The liquid storage cylinder and the pusher assembly are installed at the bottom of the mold base. The liquid storage cylinder contains lubricating fluid. When the punch moves away from the mold base, the pusher assembly pushes out the casting formed in the mold cavity. Compared with the prior art, this invention can automatically supply lubricating fluid to the mold cavity and automatically recover the lubricating fluid during precision casting, forming a lubricating oil film on the cavity wall to prevent damage to the casting during demolding. Furthermore, the lubricating fluid supplied to the mold cavity can cool and dissipate heat, preventing the mold cavity from being exposed to high temperatures for extended periods, thus affecting its service life.

Description

Technical Field

[0001] This invention belongs to the field of precision casting technology, specifically a demolding device for precision casting. Background Technology

[0002] Currently, precision casting requires the use of casting molds. Specifically, casting molds include a concave mold and a convex mold that matches the concave mold. After the convex and concave molds are closed, molten casting material is poured into the mold cavity. After cooling and solidification, the molten casting material forms the casting of the required shape inside the mold cavity. After the casting is formed, the convex and concave molds are opened, and then the casting in the mold cavity is ejected by a lifting mechanism to achieve demolding of the casting.

[0003] After the casting is formed inside the mold cavity, the close contact between the casting and the mold cavity causes intense friction between the casting surface and the mold cavity wall when the lifting mechanism ejects the casting. As a result, the casting is easily scratched. Based on this, the existing technology usually involves manually applying lubricant to the inner wall of the mold cavity before casting. The lubricant provides lubrication for the subsequent demolding of the casting, thereby reducing the friction force on the casting during demolding and avoiding damage to the casting. However, manually applying lubricant to the inner wall of the mold cavity is time-consuming and laborious, which affects the casting efficiency. In addition, the residual heat from the mold cavity during manual application of lubricant can easily burn the human body. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a demolding device for precision casting.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A precision casting demolding device includes a mold base, a liquid storage cylinder, a pusher assembly, a liquid supply assembly, and a liquid return assembly.

[0007] The upper part of the die holder is provided with a die cavity.

[0008] The liquid storage cylinder and the push assembly are installed at the bottom of the die holder, and the liquid storage cylinder contains lubricating fluid.

[0009] When the punch holder moves away from the die holder, the ejector assembly is used to push out the casting formed in the mold cavity.

[0010] The liquid supply assembly and the liquid return assembly are disposed inside the liquid storage tank.

[0011] When the push assembly pushes out the casting formed in the mold cavity, the liquid supply assembly is used to supply the lubricating liquid inside the liquid storage cylinder to the mold cavity. When the lubricating liquid level in the mold cavity reaches a predetermined height, the liquid return assembly is used to control the lubricating liquid so that the lubricating liquid flows back into the liquid storage cylinder.

[0012] As a further improvement of the present invention: a receiving groove is formed on the bottom wall of the mold cavity, a first through hole is formed on the bottom wall of the die holder, and a second through hole is formed on the top of the liquid storage cylinder; the receiving groove, the first through hole, and the second through hole are interconnected.

[0013] The jacking assembly includes a push rod, a hydraulic cylinder, and a push plate.

[0014] The push plate is embedded inside the receiving groove, the hydraulic cylinder is fixedly installed at the bottom of the liquid storage cylinder, one end of the push rod is fixedly connected to the bottom wall of the push plate, and the other end passes through the first through hole, the second through hole and the inner cavity of the liquid storage cylinder in sequence and is connected to the output end of the hydraulic cylinder.

[0015] As a further improvement of the present invention: the liquid supply assembly includes a piston disk, the piston disk is movably disposed inside the liquid storage cylinder, the push rod extends vertically through the piston disk and is fixedly connected to the piston disk, and the diameters of the first through hole and the second through hole are larger than the diameter of the push rod.

[0016] As a further improvement of the present invention: a third through hole is provided on the piston disc.

[0017] The recirculation assembly includes a support plate, a sealing plate, and a drive assembly.

[0018] The support plate is movably disposed above the piston disk, and the sealing plate is fixedly disposed at the bottom of the support plate and abuts against the upper surface of the piston disk, for sealing the third through hole.

[0019] The drive assembly is installed on the upper part of the piston disc. When the piston disc pushes the lubricating liquid inside the reservoir into the mold cavity so that the lubricating liquid level inside the mold cavity reaches a predetermined height, the drive assembly is used to drive the support plate and the sealing plate to move, so that the sealing plate releases the sealing state of the third through hole.

[0020] As a further improvement of the present invention: a top rod is fixedly provided on the inner top wall of the liquid storage cylinder, and a first inclined surface is provided at the lower end of the top rod.

[0021] The driving assembly includes a slider, a support, a first elastic element, and a slide rail.

[0022] The slide rail and the support are fixedly mounted on the upper part of the piston disc. The slider slides in cooperation with the slide rail. The upper end of the slider is provided with a second inclined surface that cooperates with the first inclined surface. One end of the first elastic element is connected to the support and the other end is connected to the slider to provide elastic support for the slider. The support plate is disposed on one side of the slider.

[0023] As a further improvement of the present invention: the support plate is hinged to one side of the slider, and the support plate and the slider are also connected by a second elastic element, which is used to provide elastic support for the support plate.

[0024] As a further improvement of the present invention: the first elastic element and the second elastic element are springs or metal sheets.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] In this embodiment of the invention, when precision casting is required, a hydraulic mechanism can be used to move the punch seat located above the die seat downwards, so that the punch seat moves into the mold cavity of the die seat, thereby completing the mold closing action. Then, the casting mechanism is used to pour the molten casting material into the mold cavity. After cooling and solidification, the molten casting material is shaped into a casting of a specific shape in the mold cavity. Subsequently, the hydraulic mechanism drives the punch seat upwards, so that the punch seat moves away from the die seat, thereby completing the mold opening action. When the punch seat moves away from the die seat, the casting formed in the mold cavity is pushed out by the push assembly. The liquid supply assembly supplies the lubricating liquid in the liquid storage tank into the mold cavity to cool the residual heat of the mold cavity. When the lubricating liquid level in the mold cavity reaches a predetermined height, the liquid return assembly controls the lubricating liquid to... The lubricating fluid is returned to the reservoir, achieving lubricant recovery. When the lubricating fluid returns to the reservoir, some lubricating fluid remains on the inner wall of the mold cavity, forming a liquid film. When precision casting is performed again, this liquid film can lubricate the casting formed in the mold cavity, so that the casting can be smoothly pushed out by the pusher assembly, avoiding scratches during gradual demolding and improving casting quality. Compared with the existing technology, during precision casting, lubricating fluid can be automatically supplied to the mold cavity and automatically recovered, forming a lubricating oil film on the mold cavity wall to prevent damage to the casting during demolding. Furthermore, the lubricating fluid supplied to the mold cavity can cool and dissipate heat, thus preventing the mold cavity from being in a high-temperature state for a long time, which would affect its service life. Attached Figure Description

[0027] Figure 1 A schematic diagram of the structure of a demolding device for precision casting. Figure 1 ;

[0028] Figure 2A schematic diagram of the structure of a demolding device for precision casting. Figure 2 ;

[0029] Figure 3 for Figure 1 Enlarged view of region A in the middle;

[0030] Figure 4 for Figure 1 Enlarged view of region B in the middle;

[0031] In the figure: 10-Die base, 101-Mold cavity, 102-Receiving groove, 103-First through hole, 20-Liquid storage cylinder, 201-Push rod, 202-Second through hole, 30-Push assembly, 301-Push rod, 302-Hydraulic cylinder, 303-Push plate, 40-Liquid supply assembly, 401-Piston disc, 402-Third through hole, 50-Liquid return assembly, 501-Support plate, 502-Slider, 503-Support, 504-First elastic element, 505-Slide rail, 506-Second elastic element, 507-Sealing plate. Detailed Implementation

[0032] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] Please see Figure 1 as well as Figure 2 This embodiment provides a demolding device for precision casting, including a die holder 10, a liquid storage cylinder 20, a push assembly 30, a liquid supply assembly 40, and a liquid return assembly 50. The die holder 10 has a mold cavity 101 on its upper part. The liquid storage cylinder 20 and the push assembly 30 are installed at the bottom of the die holder 10. The liquid storage cylinder 20 contains lubricating fluid. When the punch is away from the die holder 10, the push assembly 30 is used to push out the casting formed in the mold cavity 101. The liquid supply assembly 40 and the liquid return assembly 50 are disposed inside the liquid storage cylinder 20. When the push assembly 30 pushes out the casting formed in the mold cavity 101, the liquid supply assembly 40 is used to supply the lubricating fluid inside the liquid storage cylinder 20 to the mold cavity 101. When the lubricating fluid level in the mold cavity 101 reaches a predetermined height, the liquid return assembly 50 is used to control the lubricating fluid so that the lubricating fluid flows back to the liquid storage cylinder 20.

[0035] When precision casting is required, a hydraulic mechanism (not shown in the figure) can be used to move the punch (not shown in the figure) located above the die holder 10 downwards, so that the punch moves into the mold cavity 101 of the die holder 10, thereby completing the mold closing action. Then, the molten casting material is poured into the mold cavity 101 by the casting mechanism (not shown in the figure). After cooling and solidification, the molten casting material is shaped into a casting of a specific shape in the mold cavity 101. Subsequently, the hydraulic mechanism drives the punch to move upwards, so that the punch moves away from the die holder 10, thereby completing the mold opening action. When the punch moves away from the die holder 10, the ejector assembly 30 pushes the part formed in the mold cavity 101. As the casting is ejected, the lubricating fluid supply assembly 40 supplies the lubricating fluid from the storage cylinder 20 to the mold cavity 101 to cool the residual heat in the mold cavity 101. When the lubricating fluid level in the mold cavity 101 reaches a predetermined height, the lubricating fluid return assembly 50 controls the lubricating fluid to flow back into the storage cylinder 20, thus recovering the lubricating fluid. When the lubricating fluid flows back into the storage cylinder 20, some lubricating fluid will remain on the inner wall of the mold cavity 101, forming a liquid film. When precision casting is performed again, this liquid film can lubricate the casting formed in the mold cavity 101, so that the casting can be smoothly ejected by the push assembly 30, avoiding scratches during gradual demolding and improving casting quality.

[0036] Please see Figure 1 as well as Figure 3 In one embodiment, a receiving groove 102 is provided on the bottom wall of the mold cavity 101, a first through hole 103 is provided on the bottom wall of the die holder 10, and a second through hole 202 is provided on the top of the liquid storage cylinder 20. The receiving groove 102, the first through hole 103, and the second through hole 202 are interconnected. The push assembly 30 includes a push rod 301, a hydraulic cylinder 302, and a push plate 303. The push plate 303 is embedded in the receiving groove 102. The hydraulic cylinder 302 is fixedly installed at the bottom of the liquid storage cylinder 20. One end of the push rod 301 is fixedly connected to the bottom wall of the push plate 303, and the other end passes through the first through hole 103, the second through hole 202, and the inner cavity of the liquid storage cylinder 20 in sequence and is connected to the output end of the hydraulic cylinder 302.

[0037] When the punch seat moves away from the die seat 10 to open the mold, the hydraulic cylinder 302 drives the push rod 301 to extend, thereby pushing the push plate 303 upward. When the push plate 303 moves upward, it acts on the bottom of the casting, thereby pushing the casting out of the mold cavity 101, realizing the automatic demolding of the casting. After the casting is pushed out of the mold cavity 101, the operator can operate a robotic arm or other clamping tools to clamp the casting and remove it from above the mold cavity 101. Then, the hydraulic cylinder 302 drives the push rod 301 to retract, thereby driving the push plate 303 to move downward, so that the push plate 303 is re-embedded into the receiving groove 101, realizing the reset of the push plate 303.

[0038] Please see Figure 2 , Figure 3 as well as Figure 4 In one embodiment, the liquid supply assembly 40 includes a piston disk 401, which is movably disposed inside the liquid storage cylinder 20. The push rod 301 extends vertically through the piston disk 401 and is fixedly connected to the piston disk 401. The diameters of the first through hole 103 and the second through hole 202 are larger than the diameter of the push rod 301.

[0039] When the hydraulic cylinder 302 drives the push rod 301 to extend and push the casting out of the mold cavity 101, the push rod 301 can drive the piston disc 401 to move upward synchronously along the inside of the liquid storage cylinder 20. Since the diameter of the first through hole 103 and the second through hole 202 is larger than the diameter of the push rod 301, there is a gap between the push rod 301 and the first through hole 103 and the second through hole 202. When the piston disc 401 moves upward, the piston disc 401 pushes the lubricating fluid inside the liquid storage cylinder 20 upward, so that the lubricating fluid enters the receiving groove 102 through the gap between the push rod 301 and the first through hole 103 and the second through hole 202, and then enters the mold cavity 101 from the receiving groove 102, realizing the automatic supply of lubricating fluid.

[0040] Please see Figure 2 as well as Figure 4 In one embodiment, the piston disc 401 has a third through hole 402. The reflux assembly 50 includes a support plate 501, a sealing plate 507, and a drive assembly. The support plate 501 is movably disposed above the piston disc 401. The sealing plate 507 is fixedly disposed at the bottom of the support plate 501 and is in contact with the upper surface of the piston disc 401 to seal the third through hole 402. The drive assembly is installed on the upper part of the piston disc 401. When the piston disc 401 pushes the lubricating fluid inside the reservoir 20 into the mold cavity 101 so that the lubricating fluid level inside the mold cavity 101 reaches a predetermined height, the drive assembly is used to drive the support plate 501 and the sealing plate 507 to move, so that the sealing plate 507 releases the sealing state of the third through hole 402.

[0041] During the process of hydraulic cylinder 302 driving push rod 301 to extend and push the casting out of mold cavity 101, push rod 301 drives piston disc 401 to move upward along the inside of liquid storage cylinder 20. Sealing plate 507 acts on a certain position on the upper part of piston disc 401 to seal the third through hole 402. At this time, piston disc 401 pushes upward against the lubricating fluid inside liquid storage cylinder 20, so that the lubricating fluid enters the mold cavity 101 through the second through hole 202, the first through hole 103 and the receiving groove 102. After the lubricating fluid level inside mold cavity 101 reaches a predetermined height, the drive assembly drives support plate 501 and The sealing plate 507 moves, causing it to be removed from its current position, thereby releasing the seal on the third through hole 402. At this time, the lubricating fluid in the mold cavity 101 and the lubricating fluid remaining in the receiving tank 102 and the first through hole 103 flow back to the area inside the liquid storage cylinder 20 below the piston plate 401 through the receiving tank 102, the first through hole 103, the second through hole 202 and the third through hole 402, realizing the automatic recovery of the lubricating fluid inside the mold cavity 101. After the lubricating fluid is recovered, a lubricating fluid film can be left on the inner wall of the mold cavity 101 to facilitate the smooth demolding of the subsequent casting.

[0042] Please see Figure 2 as well as Figure 4 In one embodiment, a push rod 201 is fixedly installed on the inner top wall of the liquid storage cylinder 20. The lower end of the push rod 201 is provided with a first inclined surface. The driving assembly includes a slider 502, a support 503, a first elastic element 504, and a slide rail 505. The slide rail 505 and the support 503 are fixedly installed on the upper part of the piston disc 401. The slider 502 is slidably engaged with the slide rail 505. The upper end of the slider 502 is provided with a second inclined surface that engages with the first inclined surface. One end of the first elastic element 504 is connected to the support 503, and the other end is connected to the slider 502 to provide elastic support for the slider 502. The support plate 501 is disposed on one side of the slider 502.

[0043] After the lubricant level inside the mold cavity 101 reaches a predetermined height, the piston disc 401 moves upward along the inside of the reservoir 20 to a certain position. At this time, the first inclined surface at the lower end of the push rod 201 acts on the second inclined surface at the upper end of the slider 502. The slider 502 is pushed and slides relative to the slide rail 505. The first elastic element 504 is compressed by force. When the slider 502 slides, it drives the support plate 501 and the sealing plate 507 to move. The sealing plate 507 releases the sealing state of the third through hole 402. The lubricant in the mold cavity 101 and the lubricant remaining in the receiving groove 102 and the first through hole 103 flow back to the area inside the reservoir 20 below the piston disc 401 through the receiving groove 102, the first through hole 103, the second through hole 202 and the third through hole 402, thereby realizing the recovery of lubricant.

[0044] Please see Figure 4 In one embodiment, the support plate 501 is hinged to one side of the slider 502, and the support plate 501 and the slider 502 are also connected by a second elastic member 506, which provides elastic support to the support plate 501.

[0045] When the lubricating fluid inside the mold cavity 101 flows back to the area inside the reservoir 20 below the piston disc 401, the hydraulic cylinder 302 drives the push rod 301 to retract, thereby driving the push plate 303 to move down and reset. At this time, the push rod 301 drives the piston disc 401 to move down along the inside of the reservoir 20, and the slider 202 separates from the push rod 201. The first elastic element 504 pushes the slider 502, causing the slider 502 to slide in the opposite direction along the slide rail 505, thereby driving the support plate 501 and the sealing plate 507 to move in the opposite direction. The sealing plate 507 re-seals the third through hole 402. During the downward movement of the piston disc 401, the area below the piston disc 402... The lubricant in the area below the piston disc 401 is pressurized and passes upward through the third through hole 402, lifting the sealing plate 507 and the support plate 501. This causes the support plate 501 to rotate upward relative to the slider 502, compressing the second elastic element 506. The sealing plate 507 separates from the upper surface of the piston disc 401, thus releasing the seal of the second through hole 402. This allows the lubricant in the area below the piston disc 401 to transfer from the third through hole 402 to the area above the piston disc 401, so that the lubricant can be pushed into the mold cavity 101 again by the piston disc 401 for further cooling and lubrication.

[0046] In one embodiment, the first elastic element 504 and the second elastic element 506 can be springs or metal sheets, and there is no limitation here.

[0047] In this embodiment of the invention, when precision casting is required, a hydraulic mechanism (not shown in the figure) can be used to move the punch (not shown in the figure) located above the die holder 10 downwards, so that the punch moves into the mold cavity 101 of the die holder 10, thereby completing the mold closing action. Then, the molten casting material is poured into the mold cavity 101 by a casting mechanism (not shown in the figure). After cooling and solidification, the molten casting material is shaped into a casting of a specific shape in the mold cavity 101. Subsequently, the hydraulic mechanism drives the punch to move upwards, so that the punch moves away from the die holder 10, thereby completing the mold opening action. When the punch moves away from the die holder 10, the casting formed in the mold cavity 101 is pushed out by the push assembly 30. The liquid supply assembly 40 supplies the lubricating liquid in the liquid storage cylinder 20 into the mold cavity 101 to cool the residual heat of the mold cavity 101. When the lubricating liquid level in the mold cavity 101 reaches a predetermined height... During this process, the return fluid component 50 controls the lubricant to flow back into the storage cylinder 20, thus recovering the lubricant. When the lubricant flows back into the storage cylinder 20, some lubricant will remain on the inner wall of the mold cavity 101, forming a liquid film. When precision casting is performed again, this liquid film can lubricate the casting formed in the mold cavity 101, so that the casting can be smoothly pushed out by the push component 30, avoiding scratches during demolding and improving casting quality. Compared with the prior art, during precision casting, lubricant can be automatically supplied to the mold cavity 101 and automatically recovered, so that a lubricating oil film can be formed on the cavity wall of the mold cavity 101 to prevent damage to the casting during demolding. In addition, the lubricant supplied to the mold cavity 101 can cool and dissipate heat, thereby preventing the mold cavity 101 from being in a high-temperature state for a long time, which would affect its service life.

[0048] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A demolding device for precision casting, characterized in that, Includes a die holder, a liquid reservoir, a pusher assembly, a liquid supply assembly, and a liquid return assembly. The upper part of the die holder is provided with a die cavity. The liquid storage cylinder and the push assembly are installed at the bottom of the die holder, and the liquid storage cylinder contains lubricating fluid. When the punch holder moves away from the die holder, the ejector assembly is used to push out the casting formed in the mold cavity. The liquid supply assembly and the liquid return assembly are disposed inside the liquid storage tank. When the push assembly pushes out the casting formed in the mold cavity, the liquid supply assembly is used to supply the lubricating liquid inside the liquid storage cylinder to the mold cavity. When the lubricating liquid level in the mold cavity reaches a predetermined height, the liquid return assembly is used to control the lubricating liquid so that the lubricating liquid flows back into the liquid storage cylinder.

2. The demolding device for precision casting according to claim 1, characterized in that, A receiving groove is formed on the bottom wall of the mold cavity, a first through hole is formed on the bottom wall of the die holder, and a second through hole is formed on the top of the liquid storage cylinder. The receiving groove, the first through hole, and the second through hole are interconnected. The jacking assembly includes a push rod, a hydraulic cylinder, and a push plate. The push plate is embedded inside the receiving groove, the hydraulic cylinder is fixedly installed at the bottom of the liquid storage cylinder, one end of the push rod is fixedly connected to the bottom wall of the push plate, and the other end passes through the first through hole, the second through hole and the inner cavity of the liquid storage cylinder in sequence and is connected to the output end of the hydraulic cylinder.

3. The demolding device for precision casting according to claim 2, characterized in that, The liquid supply assembly includes a piston disc, which is movably disposed inside the liquid storage cylinder. The push rod extends vertically through the piston disc and is fixedly connected to the piston disc. The diameters of the first through hole and the second through hole are larger than the diameter of the push rod.

4. A demolding device for precision casting according to claim 3, characterized in that, The piston disc has a third through hole. The recirculation assembly includes a support plate, a sealing plate, and a drive assembly. The support plate is movably disposed above the piston disk, and the sealing plate is fixedly disposed at the bottom of the support plate and abuts against the upper surface of the piston disk, for sealing the third through hole. The drive assembly is installed on the upper part of the piston disc. When the piston disc pushes the lubricating liquid inside the reservoir into the mold cavity so that the lubricating liquid level inside the mold cavity reaches a predetermined height, the drive assembly is used to drive the support plate and the sealing plate to move, so that the sealing plate releases the sealing state of the third through hole.

5. A demolding device for precision casting according to claim 4, characterized in that, A push rod is fixedly installed on the inner top wall of the liquid storage cylinder, and a first inclined surface is provided at the lower end of the push rod. The driving assembly includes a slider, a support, a first elastic element, and a slide rail. The slide rail and the support are fixedly mounted on the upper part of the piston disc. The slider slides in cooperation with the slide rail. The upper end of the slider is provided with a second inclined surface that cooperates with the first inclined surface. One end of the first elastic element is connected to the support and the other end is connected to the slider to provide elastic support for the slider. The support plate is disposed on one side of the slider.

6. A demolding device for precision casting according to claim 5, characterized in that, The support plate is hinged to one side of the slider, and the support plate and the slider are also connected by a second elastic element, which provides elastic support to the support plate.

7. A demolding device for precision casting according to claim 6, characterized in that, The first elastic element and the second elastic element are springs or metal sheets.

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