A mold for vacuum casting

Abstract

The application relates to the field of casting equipment and discloses a mold for vacuum casting, which comprises a bottom plate, a first fixing rod fixedly installed on the bottom plate, a top plate fixedly installed at the top of the first fixing rod, a first telescopic rod fixedly installed at the bottom center of the top plate, an upper mold fixedly installed at the bottom of the first telescopic rod, and a centering adjusting device arranged at the top center of the bottom plate; the installation base is driven to ascend and descend by starting the lifting piece, the limiting piece slides on the bottom plate and the top of the adjusting piece, the limiting piece can be in contact with the adjusting piece during the sliding process, the position of the limiting piece is limited by the adjusting piece, the inclination and deformation problems possibly generated when the upper mold and the lower mold are combined are reduced, the stability during the combining process is improved, after the upper mold and the lower mold are combined to complete the casting, the lower mold is clamped by the centering clamping piece, the upper mold and the lower mold are separated, and the problem that the upper mold is lifted to drive the lower mold to synchronously ascend, thereby causing the separation difficulty is prevented.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, and more specifically, to a mold for vacuum casting. Background Technology

[0002] Vacuum casting molds are specialized tools used for casting metals or alloys in a vacuum environment. By evacuating the mold cavity, they effectively prevent defects such as porosity in the castings and significantly improve the density and surface quality of the castings. These molds are mostly made of high-temperature resistant materials and are suitable for the field of precision casting, especially for producing high-quality, complex small castings.

[0003] A patent application with publication number CN113664182B discloses a vacuum casting equipment, including a vacuum heating chamber and a cooling chamber arranged sequentially, two feeding devices, and a mold conveying device. The vacuum heating chamber includes a chamber body, with a material passage hole and a pushing hole respectively arranged on opposite sides of the chamber body, connecting to the cooling chamber. The mold conveying device includes a pushing rod and a pushing rod drive component. The pushing rod drive component drives the pushing rod to pass through the pushing hole and move the mold in the chamber body from the material passage hole to the cooling chamber. A sealing component is arranged on the outside of the pushing hole. The sealing component includes a second driving component arranged on one side of the pushing hole and a sealing plate arranged on the output end of the second driving component. By arranging the vacuum heating chamber and the cooling chamber sequentially, the heating chamber and the cooling chamber are isolated and their temperatures do not interfere with each other, effectively reducing energy consumption loss and improving casting efficiency.

[0004] While the aforementioned device can perform vacuuming and sealing during use, the mold installation process is rather complicated. Furthermore, both molds are closed using a hydraulic press, which can easily lead to slight tilting during the mold closing process, resulting in burrs and cracks on the produced workpieces. Summary of the Invention

[0005] This invention provides a mold for vacuum casting, which solves the technical problem that the mold is troublesome to install in the related technology, and that the two molds are closed by a hydraulic press, which makes it easy for slight tilting to occur during the mold closing process, resulting in burrs and cracks in the produced workpieces.

[0006] This invention provides a mold for vacuum casting, comprising a base plate, a first fixing rod fixedly mounted on the base plate, a top plate fixedly mounted on the top of the first fixing rod, a first telescopic rod fixedly mounted at the bottom center of the top plate, an upper mold fixedly mounted at the bottom of the first telescopic rod, a centering adjustment device disposed at the top center of the base plate, a lower mold placed on top of the centering adjustment device, the lower mold having a vacuum channel communicating with a vacuum system, and a pouring port for pouring molten metal on the lower mold; the centering adjustment device is used to drive and center the lower mold during the mold closing process of vacuum casting to ensure that the cavities of the upper mold and the lower mold are precisely aligned to form a sealed casting cavity, facilitating vacuum evacuation by the vacuum system; and during the mold separation process after pouring is completed. The lower mold is held in place to prevent mold separation difficulties. The centering adjustment device includes a centering clamping component, a limiting component, a detection component, a first gear, a lifting component, a mounting component, an adjusting component, and a mounting base. A mounting component is provided at the top center of the base plate, and a mounting base is provided at the top of the mounting component. A circumferential array of centering clamping components is fixedly installed on the outside of the mounting base. A limiting component is provided on the side of the centering clamping component, and a detection component is provided at the bottom of the centering clamping component. The detection component slides on the top of the base plate. A lifting component is fixedly installed inside the base plate to drive the mounting base to rise and fall. An adjusting component is rotatably installed inside the base plate to lock the limiting component. A first gear is rotatably installed on the top of the base plate, and the first gear meshes with the adjusting component.

[0007] As a further optimization of the present invention, the mounting component includes a mounting block fixedly installed at the top center of the base plate, a third spring fixedly installed on the top of the mounting block, the top of the third spring fixedly installed to the bottom of the mounting base, a lower mold placed on the top of the mounting base, a plurality of mold limiting rods fixedly installed on the top of the lower mold, and a plurality of holes provided on the upper mold for contact and limiting with the lower mold.

[0008] As a further optimization of the present invention, the centering clamping member includes a first fixing plate and a second fixing plate symmetrically arranged on the side of the mounting base, fixedly installed. A first rotating rod is rotatably installed between the first fixing plate and the second fixing plate. A second rotating block and a third rotating block are symmetrically installed on the outside of the first rotating rod. A first spring is provided on the outside of the first rotating rod. The two ends of the first spring are fixedly installed with the sides of the second rotating block and the sides of the third rotating block. A limiting member is rotatably installed at the bottom of the third rotating block. A detection member is rotatably installed on the second fixing plate. A fourth rotating block symmetrically arranged is rotatably installed at the end of the second rotating block. A third fixing plate is fixedly installed on the side of the fourth rotating block. The side of the third fixing plate is used to contact the side of the lower mold.

[0009] As a further optimization of the present invention, the limiting member includes a limiting protrusion rotatably mounted on the bottom of the third rotating block. A limiting slide plate is fixedly mounted on the bottom of the limiting protrusion. A second fixing rod is symmetrically arranged fixedly mounted on the top of the limiting slide plate on the side away from the limiting protrusion. A fourth fixing plate is fixedly mounted on the top of the second fixing rod. A second slide rod is slidably mounted inside the fourth fixing plate. A slide rod limiting block is fixedly mounted on the outer wall of the second slide rod. A second spring is fixedly mounted on the top of the slide rod limiting block. The top of the second spring is fixedly mounted to the bottom of the fourth fixing plate. A slide rod fixing block is fixedly mounted on the top of the second slide rod. The second slide rod penetrates the interior of the limiting slide plate and contacts the top of the base plate. When the lower mold and the upper mold are closed, the mounting seat descends, causing the limiting member to slide on the top of the base plate, so that the adjusting member limits the limiting member.

[0010] As a further optimization of the present invention, the detection element includes a first detection block rotatably mounted on the side of the second fixed plate, a detection rod fixedly mounted inside the first detection block, a third detection block fixedly mounted on the side of the fourth rotating block, and a second detection block rotatably mounted on the side of the third detection block away from the fourth rotating block, and the second detection block is fixedly mounted to the detection rod.

[0011] As a further optimization of the present invention, the lifting component includes a first motor fixedly installed inside the base plate, and a threaded rod is fixedly installed on the top of the first motor. The threaded rod is installed with a protruding thread provided on the outside of the mounting base.

[0012] As a further optimization of the present invention, the adjusting component includes a rotating gear plate rotatably installed inside the base plate, teeth fixedly installed on the outside of the rotating gear plate, and a limiting groove provided inside the rotating gear plate. When the limiting slide plate moves, it drives the second slide rod to slide inside the limiting groove.

[0013] As a further optimization of the present invention, the teeth are provided with a slope so that when the rotating gear plate rotates, the teeth release the locking effect on the second slide rod.

[0014] As a further optimization of the present invention, when the second rotating block rotates to its highest point, the third fixing plate is higher than the bottom height of the lower mold.

[0015] As a further optimization of the present invention, a torsion spring is provided at the connection position between the second detection block and the third detection block, so that when the third fixing plate moves, the contact position between the side of the third fixing plate and the side of the lower mold is always on the same plane.

[0016] The beneficial effects of this invention are as follows:

[0017] The vacuum casting mold of the present invention uses a lifting mechanism to raise and lower the mounting base, allowing the limiting component to slide on the top of the base plate and the adjusting component. During the sliding process, the limiting component can contact the adjusting component, thereby limiting the position of the limiting component through the adjusting component. This reduces the tilting and deformation problems that may occur when the upper and lower molds are closed, and improves the stability during the mold closing process. After the upper and lower molds are closed to complete the casting, the lower mold can be clamped by the centering clamping component, and the upper and lower molds can be separated. This prevents the upper mold from causing the lower mold to rise synchronously when it rises, which would make the mold separation difficult. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall shape of the device of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall device installation of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the centering adjustment device of the present invention;

[0021] Figure 4 This is a schematic diagram showing the positions of the mounting components and lifting components of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the adjusting component of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal structure of the detection component and the limiting component of the present invention.

[0024] In the picture:

[0025] 1. Base plate; 11. First fixing rod; 12. Top plate; 13. First telescopic rod; 14. Upper mold; 15. Lower mold; 151. Mold limiting rod;

[0026] 2. Centering adjustment device; 21. Centering clamping component; 211. First fixed plate; 212. First rotating rod; 213. Second rotating block; 214. Third rotating block; 215. Second fixed plate; 216. First spring; 217. Fourth rotating block; 218. Third fixed plate; 22. Limiting component; 221. Limiting slide plate; 222. Limiting protrusion; 223. Second fixed rod; 224. Fourth fixed plate; 225. Second sliding rod; 226. Sliding rod limiting block ; 227. Second spring; 228. Slide rod fixing block; 23. Detection component; 231. First detection block; 232. Second detection block; 233. Detection rod; 234. Third detection block; 24. First gear; 25. Lifting component; 251. First motor; 252. Threaded rod; 26. Mounting component; 261. Mounting block; 262. Third spring; 27. Adjusting component; 271. Rotary gear plate; 272. Gear teeth; 273. Limiting slide groove; 28. Mounting base. Detailed Implementation

[0027] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0028] like Figures 1 to 3 As shown in the embodiment of the present invention, a vacuum casting mold includes a base plate 1, on which a first fixing rod 11 is fixedly installed. A top plate 12 is fixedly installed on the top of the first fixing rod 11. A first telescopic rod 13 is fixedly installed at the bottom center of the top plate 12. An upper mold 14 is fixedly installed at the bottom of the first telescopic rod 13. A centering adjustment device 2 is provided at the top center of the base plate 1. A lower mold 15 is placed on the top of the centering adjustment device 2. The lower mold 15 has a vacuum channel communicating with a vacuum system. A pouring port for pouring molten metal is opened on the lower mold 15.

[0029] The centering adjustment device 2 is used to drive and center the lower mold 15 during the mold closing process of vacuum casting to ensure that the cavities of the upper mold 14 and the lower mold 15 are precisely aligned to form a sealed casting cavity, which facilitates the vacuum system to evacuate the vacuum. During the mold separation process after pouring, it maintains the clamping of the lower mold 15 to prevent mold separation difficulties.

[0030] like Figures 3 to 6As shown, the centering adjustment device 2 includes a centering clamp 21, a limiting member 22, a detection member 23, a first gear 24, a lifting member 25, a mounting member 26, an adjusting member 27, and a mounting base 28. The mounting member 26 is provided at the top center of the base plate 1, and the mounting base 28 is provided at the top of the mounting member 26. A circular array of centering clamps 21 is fixedly installed on the outside of the mounting base 28. The limiting member 22 is provided on the side of the centering clamp 21, and the detection member 23 is provided at the bottom of the centering clamp 21. The detection member 23 slides on the top of the base plate 1. The lifting member 25 is fixedly installed inside the base plate 1. The lifting member 25 is used to drive the mounting base 28 to rise and fall. The adjusting member 27 is rotatably installed inside the base plate 1. The adjusting member 27 is used to lock the limiting member 22. The first gear 24 is rotatably installed on the top of the base plate 1. The first gear 24 meshes with the adjusting member 27.

[0031] It should be noted that the principle of vacuum casting is to use vacuum equipment to extract the gas from the mold cavity and create a negative pressure environment. The negative pressure rapidly draws molten metal into the mold cavity, forcing the molten metal to fully fill the finest textures while effectively expelling gas from inside the metal. This prevents defects such as porosity and insufficient filling in the casting. However, before vacuum casting, the mold needs to be installed on the vacuum casting equipment. During this process, the upper mold 14 and the lower mold 15 need to be aligned. Then, the first telescopic rod 13 is activated to lower the upper mold 14, bringing the upper mold 14 and the lower mold 15 closer together. The upper mold 14 and the lower mold 15 are then joined together. A mold limiting rod 151 is fixedly installed on the top of the lower mold 15, allowing the mold limiting rod 151 to be inserted into the interior of the upper mold 14 when the lower mold 15 and the upper mold 14 are in contact, thus preventing displacement when the upper mold 14 and the lower mold 15 are in contact. However, with repeated use of the upper mold 14 and the lower mold 15, and the possible presence of impurities and deformation between the mold limiting rods 151, the upper mold 14 and the lower mold 15 may not be aligned when they are closed. To solve this problem, the following improvements have been made.

[0032] The lower mold 15 with a cavity is placed on top of the mounting base 28, which is mounted on top of the mounting component 26. The mounting component 26 is located at the top center of the base plate 1. This allows the lower mold 15 to be positioned at the top center of the base plate 1 via the centering adjustment device 2. During this process, the lifting component 25 can be activated to lower the mounting base 28. At this time, the lower mold 15 is located on top of the mounting base 28. As the mounting base 28 lowers, it can move and rotate the centering clamping component 21. During the rotation of the centering clamping component 21, it can clamp the side of the lower mold 15. Multiple centering clamping components 21 clamp simultaneously, keeping the lower mold 15 at the top center of the mounting base 28. The movement of the centering clamping component 21 can... The limiting member 22 slides on the top of the base plate 1 and the adjusting member 27, thereby locking the limiting member 22 with the adjusting member 27. This achieves the clamping and centering effect of the lower mold 15, keeping the lower mold 15 in the center position of the base plate 1, so that the centers of the upper mold 14 and the lower mold 15 are aligned. When the lower mold 15 and the upper mold 14 are close together, the lower mold 15 is always in the center position of the top of the base plate 1, reducing the impact of slight tilting of the mold limiting rod 151, and reducing the problem of slight deformation caused by compression when the lower mold 15 and the upper mold 14 are in contact, thus improving the stability during mold closing. After the upper mold 14 and the lower mold 15 are closed, the first... When the telescopic rod 13 extends, the mounting base 28 descends to contact the base plate 1. The limiting member 22 then moves forward and slides on top of the adjusting member 27. The first telescopic rod 13 extends to its maximum length. The detection member 23 on the side of the centering clamping member 21 can detect the side tilt angle of the lower mold 15. Afterwards, a vacuum can be drawn inside the lower mold 15, allowing for vacuum pouring of molten metal after the upper mold 14 and lower mold 15 are closed. Once pouring is complete, the first telescopic rod 13 retracts. During retraction, the mounting base 28 rises, causing the lifting member 25 to rotate. The limiting member 22 slides on top of the adjusting member 27, and the adjusting member 27 limits the movement of the limiting member 22. This allows the centering clamping member 21 to continuously clamp the lower mold 15, facilitating mold separation between the upper mold 14 and the lower mold 15. This prevents the upper mold 14 from rising synchronously with the lower mold 15, improving mold closing efficiency and safety, and reducing the difficulty of mold separation after mold closing. When it is necessary to remove the lower mold 15 from the top of the mounting base 28, the motor drives the first gear 24 to rotate. The rotation of the first gear 24 causes the adjusting member 27 to rotate, releasing the locking effect of the adjusting member 27 on the limiting member 22. Then, the centering clamping member 21 no longer clamps the lower mold 15, allowing it to be removed. During use, the lifting member 25 can be activated to raise and lower the mounting base 28.The limiting member 22 slides on the top of the base plate 1 and the adjusting member 27. During the sliding process, the limiting member 22 can contact the adjusting member 27, thereby limiting the position of the limiting member 22 through the adjusting member 27. This reduces the tilting and deformation problems that may occur when the upper mold 14 and the lower mold 15 are closed, improving the stability during the mold closing process. After the upper mold 14 and the lower mold 15 are closed to complete the casting, the lower mold 15 can be clamped by the centering clamping member 21, and the upper mold 14 and the lower mold 15 can be separated. This prevents the upper mold 14 from causing the lower mold 15 to rise synchronously when it rises, which would cause difficulties in mold separation.

[0033] like Figures 3 to 4 As shown, the mounting component 26 includes a mounting block 261 fixedly mounted at the top center of the base plate 1. A third spring 262 is fixedly mounted on the top of the mounting block 261. The top of the third spring 262 is fixedly mounted to the bottom of the mounting base 28. A lower mold 15 is placed on the top of the mounting base 28. A plurality of mold limiting rods 151 are fixedly mounted on the top of the lower mold 15. A plurality of holes are provided on the upper mold 14 for contacting and limiting the lower mold 15.

[0034] It should be noted that the mounting block 261 is used to limit the mounting seat 28, while the third spring 262 can make the mounting seat 28 rise and fall when the lifting component 25 rotates, so as to play a buffering role when the upper mold 14 descends and contacts the lower mold 15.

[0035] like Figures 3 to 6 As shown, the centering clamping member 21 includes a first fixing plate 211 and a second fixing plate 215 symmetrically arranged on the side of the mounting base 28. A first rotating rod 212 is rotatably mounted between the first fixing plate 211 and the second fixing plate 215. A second rotating block 213 and a third rotating block 214 are symmetrically mounted on the outside of the first rotating rod 212. A first spring 216 is provided on the outside of the first rotating rod 212. The two ends of the first spring 216 are fixedly mounted to the side of the second rotating block 213 and the side of the third rotating block 214. A limiting member 22 is rotatably mounted on the bottom of the third rotating block 214. A detection member 23 is rotatably mounted on the second fixing plate 215. A fourth rotating block 217 symmetrically arranged is rotatably mounted on the end of the second rotating block 213. A third fixing plate 218 is fixedly mounted on the side of the fourth rotating block 217. The side of the third fixing plate 218 is used to contact the side of the lower mold 15.

[0036] It should be noted that the descent of the mounting base 28 causes the first fixing plate 211 and the second fixing plate 215 to descend. The descent of the first fixing plate 211 and the second fixing plate 215 causes the limiting member 22 at the end of the third rotating block 214 to slide on the top of the base plate 1 and the adjusting member 27, thereby causing the third rotating block 214 to rotate. A first spring 216 is provided between the third rotating block 214 and the second rotating block 213. Therefore, during the rotation of the third rotating block 214, the second rotating block 213 rotates synchronously, thereby causing the fourth rotating block 217 and the third fixing plate 218 at the end of the second rotating block 213 to rotate. This makes the fourth rotating block 217 and the third fixing plate 218 closer to the side of the lower mold 15, thereby clamping and centering the lower mold 15. A detection member 23 is provided on the side of the second fixing plate 215. The detection member 23 can make the surface of the third fixing plate 218 in contact with the lower mold 15 at the same horizontal plane, thereby achieving the function of adjusting the direction of the third fixing plate 218.

[0037] like Figures 5 to 6 As shown, the limiting member 22 includes a limiting protrusion 222 rotatably mounted on the bottom of the third rotating block 214. A limiting slide plate 221 is fixedly mounted on the bottom of the limiting protrusion 222. A second fixing rod 223 is symmetrically arranged fixedly mounted on the top of the limiting slide plate 221 on the side away from the limiting protrusion 222. A fourth fixing plate 224 is fixedly mounted on the top of the second fixing rod 223. A second sliding rod 225 is slidably mounted inside the fourth fixing plate 224. A sliding rod limiting block 226 is fixedly mounted on the outer wall of the second sliding rod 225. A second spring 227 is fixedly installed on the top of the sliding rod limiting block 226. The top of the second spring 227 is fixedly installed on the bottom of the fourth fixing plate 224. A sliding rod fixing block 228 is fixedly installed on the top of the second sliding rod 225. The second sliding rod 225 passes through the interior of the limiting slide plate 221 and contacts the top of the base plate 1. When the lower mold 15 and the upper mold 14 are closed, the mounting base 28 descends, causing the limiting member 22 to slide on the top of the base plate 1, so that the adjusting member 27 limits the limiting member 22.

[0038] It should be noted that the top of the limiting slide plate 221 slides on the top of the base plate 1 and the adjusting member 27. Under the action of the second spring 227 at the top of the slide rod limiting block 226, the second slide rod 225 tends to move towards the bottom of the base plate 1. Therefore, when the limiting slide plate 221 slides on the adjusting member 27, the top of the adjusting member 27 is provided with a corresponding groove, which allows the second slide rod 225 to slide inside the adjusting member 27, thereby limiting the position of the limiting slide plate 221. Afterwards, by rotating the adjusting member 27, the second slide rod 225 can be raised again, so that the centering clamping member 21 no longer clamps the lower mold 15, thus achieving the effect of replacing the lower mold 15.

[0039] like Figures 3 to 6 As shown, the detection element 23 includes a first detection block 231 rotatably mounted on the side of the second fixed plate 215, a detection rod 233 fixedly mounted inside the first detection block 231, a third detection block 234 fixedly mounted on the side of the fourth rotating block 217, and a second detection block 232 rotatably mounted on the side of the third detection block 234 away from the fourth rotating block 217. The second detection block 232 is fixedly mounted to the detection rod 233.

[0040] It should be noted that the first detection block 231 is rotatably mounted on the side of the second fixed plate 215, while the third detection block 234 is fixedly mounted on the fourth rotating block 217. A torsion spring is provided at the connection position between the second detection block 232 and the third detection block 234. Therefore, the angle of the third fixed plate 218 can be adjusted when the second rotating block 213 rotates. When the second rotating block 213 rotates to the highest point, the side of the third fixed plate 218 can be made to be on the same horizontal plane as the side of the lower mold 15. This prevents the third fixed plate 218 from being arbitrarily angled and causing multiple frictions between the third fixed plate 218 and the lower mold 15 when in contact with the side of the lower mold 15, thus preventing wear on the side of the third fixed plate 218 and improving the stability of the device operation. The torsion spring between the third detection block 234 and the second detection block 232 allows the third fixed plate 218 to tilt relative to the lower mold 15, thereby providing a protective function.

[0041] like Figures 3 to 4 As shown, the lifting component 25 includes a first motor 251 fixedly installed inside the base plate 1. A threaded rod 252 is fixedly installed on the top of the first motor 251, and the threaded rod 252 is installed with a protruding thread on the outside of the mounting base 28.

[0042] It should be noted that the starting lifting component 25 can drive the first motor 251 to rotate, and the rotation of the first motor 251 can drive the mounting base 28 to rise and fall, thereby causing the limiting component 22 to move to the position that contacts the adjusting component 27, so as to achieve the limiting of the limiting component 22 and the clamping of the lower mold 15.

[0043] like Figures 3 to 6 As shown, the adjusting member 27 includes a rotating gear plate 271 rotatably installed inside the base plate 1. Teeth 272 are fixedly installed on the outside of the rotating gear plate 271. A limiting groove 273 is provided inside the rotating gear plate 271. When the limiting slide plate 221 moves, it drives the second slide rod 225 to slide inside the limiting groove 273.

[0044] It should be noted that when the first telescopic rod 13 is activated, it drives the upper mold 14 to continuously press down, causing the mounting base 28 to descend. At this time, the limiting member 22 slides away from the center of the base plate 1, and the limiting groove 273 can act as a buffer. When the upper mold 14 and the lifting member 25 are separating, the limiting groove 273 can limit the second sliding rod 225, so that the centering clamping member 21 clamps the lower mold 15. Thus, when the upper mold 14 rises, it will not drive the lower mold 15 to rise synchronously. If the lower mold 15 needs to be replaced, the motor can drive the first gear 24 to rotate. The first gear 24 drives the teeth 272 and the rotating gear plate 271 to rotate, thereby driving the second sliding rod 225 to slide inside the limiting groove 273, so that the second sliding rod 225 continues to rise. When the end of the second sliding rod 225 rises to the same height as the top of the base plate 1, the limiting effect is released, and the lower mold 15 can then be replaced.

[0045] like Figures 3 to 6 As shown, the tooth 272 is provided with a slope so that when the rotating gear plate 271 rotates, the tooth 272 releases the locking effect on the second slide bar 225.

[0046] It should be noted that the tooth 272 is provided with a slope so that when the rotating gear plate 271 rotates, the tooth 272 releases the locking effect on the second slide bar 225, which serves to lock the lower mold 15 and release the clamping effect on the lower mold 15. When the mold is separated, the clamping effect on the lower mold 15 facilitates the separation of the upper mold 14 and the lower mold 15. When it is replaced, the clamping effect on the lower mold 15 can be removed.

[0047] like Figures 1 to 3 As shown, the second rotating block 213 rotates to its highest point, and the third fixing plate 218 is higher than the bottom height of the lower mold 15.

[0048] It should be noted that when the second rotating block 213 rotates to its highest point, the third fixing plate 218 is higher than the bottom height of the lower mold 15, which facilitates the clamping effect of the lower mold 15 and the detection of the tilt angle of the lower mold 15.

[0049] like Figures 3 to 6 As shown, a torsion spring is provided at the connection position between the second detection block 232 and the third detection block 234, so that when the third fixing plate 218 moves, the position where the side of the third fixing plate 218 contacts the side of the lower mold 15 is always on the same plane.

[0050] It should be noted that a torsion spring is provided at the connection position between the second detection block 232 and the third detection block 234, so that when the third fixing plate 218 moves, the contact position between the side of the third fixing plate 218 and the side of the lower mold 15 is always on the same plane.

[0051] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the embodiments described above, all of which are within the protection scope of the present invention.

Claims

1. A mold for vacuum casting, comprising a base plate (1), characterized in that: A first fixing rod (11) is fixedly installed on the base plate (1). A top plate (12) is fixedly installed on the top of the first fixing rod (11). A first telescopic rod (13) is fixedly installed at the bottom center of the top plate (12). An upper mold (14) is fixedly installed at the bottom of the first telescopic rod (13). A centering adjustment device (2) is provided at the top center of the base plate (1). A lower mold (15) is placed on the top of the centering adjustment device (2). A vacuum channel connected to a vacuum system is provided inside the lower mold (15). A pouring port for pouring molten metal is opened on the lower mold (15). The centering adjustment device (2) is used to drive and center the lower mold (15) during the mold closing process of vacuum casting to ensure that the cavities of the upper mold (14) and the lower mold (15) are precisely aligned to form a sealed casting cavity, which facilitates the vacuum system to evacuate the vacuum; and to maintain the clamping of the lower mold (15) during the mold separation process after pouring to prevent mold separation difficulties. The centering adjustment device (2) includes a centering clamp (21), a limiting member (22), a detection member (23), a first gear (24), a lifting member (25), a mounting member (26), an adjusting member (27), and a mounting base (28). The mounting member (26) is located at the top center of the base plate (1), and the mounting base (28) is located on the top of the mounting member (26). A circular array of centering clamps (21) is fixedly mounted on the outside of the mounting base (28), and a detection member (23) is located on the side of the centering clamp (21). A limiting member (22) is provided at the bottom of the centering clamp (21). The limiting member (22) slides on the top of the base plate (1). A lifting member (25) is fixedly installed inside the base plate (1). The lifting member (25) is used to drive the mounting seat (28) to rise and fall. An adjusting member (27) is rotatably installed inside the base plate (1). The adjusting member (27) is used to lock the limiting member (22). A first gear (24) is rotatably installed on the top of the base plate (1). The first gear (24) meshes with the adjusting member (27). The centering clamp (21) includes a first fixing plate (211) and a second fixing plate (215) symmetrically arranged on the side of the mounting base (28). A first rotating rod (212) is rotatably mounted between the first fixing plate (211) and the second fixing plate (215). A second rotating block (213) and a third rotating block (214) are symmetrically mounted on the outside of the first rotating rod (212). A first spring (216) is provided on the outside of the first rotating rod (212). The two ends of the first spring (216) are connected to the centering clamp (28). The second rotating block (213) and the third rotating block (214) are fixedly installed on the side. A limiter (22) is rotatably installed on the bottom of the third rotating block (214). A detection piece (23) is rotatably installed on the second fixed plate (215). A symmetrically arranged fourth rotating block (217) is rotatably installed on the end of the second rotating block (213). A third fixed plate (218) is fixedly installed on the side of the fourth rotating block (217). The side of the third fixed plate (218) is used to contact the side of the lower mold (15). The limiting member (22) includes a limiting protrusion (222) rotatably mounted on the bottom of the third rotating block (214). A limiting slide plate (221) is fixedly mounted on the bottom of the limiting protrusion (222). A second fixing rod (223) is fixedly mounted symmetrically on the top of the limiting slide plate (221) on the side away from the limiting protrusion (222). A fourth fixing plate (224) is fixedly mounted on the top of the second fixing rod (223). A second slide rod (225) is slidably mounted inside the fourth fixing plate (224). A slide rod limiting block (226) is fixedly mounted on the outer wall of the second slide rod (225). A second spring (227) is fixedly installed on the top of the position block (226). The top of the second spring (227) is fixedly installed on the bottom of the fourth fixing plate (224). A slide rod fixing block (228) is fixedly installed on the top of the second slide rod (225). The second slide rod (225) passes through the interior of the limiting slide plate (221) and contacts the top of the base plate (1). When the lower mold (15) and the upper mold (14) are closed, the mounting seat (28) descends, causing the limiting member (22) to slide on the top of the base plate (1), so that the adjusting member (27) limits the limiting member (22). The adjusting component (27) includes a rotating gear plate (271) rotatably installed inside the base plate (1). The rotating gear plate (271) has teeth (272) fixedly installed on its exterior. The rotating gear plate (271) has a limiting groove (273) inside its interior. When the limiting slide plate (221) moves, it drives the second slide rod (225) to slide inside the limiting groove (273).

2. The mold for vacuum casting according to claim 1, characterized in that: The mounting component (26) includes a mounting block (261) fixedly mounted at the top center of the base plate (1). A third spring (262) is fixedly mounted on the top of the mounting block (261). The top of the third spring (262) is fixedly mounted to the bottom of the mounting base (28). A lower mold (15) is placed on the top of the mounting base (28). A plurality of mold limiting rods (151) are fixedly mounted on the top of the lower mold (15). A plurality of holes are provided on the upper mold (14) for contact and limiting with the lower mold (15).

3. A mold for vacuum casting according to claim 2, characterized in that: The detection component (23) includes a first detection block (231) rotatably mounted on the side of the second fixed plate (215), a detection rod (233) is fixedly mounted inside the first detection block (231), a third detection block (234) is fixedly mounted on the side of the fourth rotating block (217), and a second detection block (232) is rotatably mounted on the side of the third detection block (234) away from the fourth rotating block (217), and the second detection block (232) is fixedly mounted to the detection rod (233).

4. A mold for vacuum casting according to claim 3, characterized in that: The lifting component (25) includes a first motor (251) fixedly installed inside the base plate (1). A threaded rod (252) is fixedly installed on the top of the first motor (251). The threaded rod (252) is installed with a protruding thread on the outside of the mounting base (28).

5. A mold for vacuum casting according to claim 4, characterized in that: The limiting slide groove (273) is provided with a slope so that when the rotating gear plate (271) rotates, the limiting slide groove (273) releases the locking effect on the second slide rod (225).

6. A mold for vacuum casting according to claim 5, characterized in that: The second rotating block (213) rotates to its highest point, and the third fixed plate (218) is higher than the bottom height of the lower mold (15).

7. A mold for vacuum casting according to claim 6, characterized in that: A torsion spring is provided at the connection position between the second detection block (232) and the third detection block (234), so that when the third fixing plate (218) moves, the position where the side of the third fixing plate (218) contacts the side of the lower mold (15) is always on the same plane.

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