Pouring device and method for producing high-quality valve casting

Abstract

The invention discloses a casting device and method for producing a high-quality valve casting, relates to the technical field of metal casting devices, and solves the problems that when the cast casting is demoulded, the casting is cooled, and the traction force between the casting and a material in a lower mould base is relatively large, so that the casting is not easy to deform. The lifting rod can be moved out from the interior of the lower die base only through large extrusion force, and damage to a driving source and a casting is large. The casting device for producing the high-quality valve casting comprises a device support and a casting box, an upper support is installed at the top of the device support through screws, the casting box is arranged in the center of the top of the upper support, and the casting device comprises a vibration demolding mechanism installed in the upper support; and the casting mold is arranged in the casting box. According to the demolding device, through forward and reverse rotation of the driving source, the castings under different conditions can be ejected and demolded, the demolding effect is improved while the demolding efficiency is improved, and the quality of the demolded valve castings is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting devices, and specifically to a casting device and method for producing high-quality valve castings. Background Art

[0002] Valve castings are gate valves cast from metal steel into castings for processing, and are mainly used as regulating and intercepting devices in pipeline systems. During the production and processing of valve castings, in order to ensure the sealing performance and quality of valve castings, casting operations of metal parts are generally used to complete the production operations. After the valve castings are cast and cooled, operations such as demolding and grinding are performed on the valve castings to obtain finished valve castings.

[0003] The existing Chinese patent application with the publication number CN118720108A discloses a demolding device for a mold in metal part processing, including a forming box. A connecting plate is hermetically and slidably connected inside the forming box. A lifting screw rod is rotatably connected to the bottom inside the forming box. A lifting nut is threadedly connected to the lifting screw rod, and the upper end of the lifting nut is fixedly connected with a plurality of lifting rods. One end of the lifting rod far from the lifting nut is fixedly connected to the lower end of the connecting plate. In this invention, by setting the lifting screw rod, lifting nut and lifting rod, when demolding is required, the lifting screw rod can be rotated by a servo drive motor, so that the lifting nut can push the lifting rod and the connecting plate to move upward. Compared with the demolding method using the elastic force of a spring, this device can provide more demolding force, so that the formed metal part can be smoothly demolded.

[0004] However, the demolding device has the following defects in specific use: 1. When the existing demolding device demolds the cast metal parts (including but not limited to: valve castings) after casting, generally, the driving source is used to drive the lifting rod to move up and down, squeeze the castings inside the mold and drive the castings to move upward, and remove the castings after casting from the inside of the lower mold base. However, when actually performing the above demolding operation, since the castings have just cooled down, there is a large traction force between the castings and the materials inside the lower mold base. The lifting rod requires a large extrusion force to remove it from the inside of the lower mold base, which has high requirements for and causes great damage to the driving source. At the same time, the large lifting force is also likely to cause pits on the surface of the metal castings, which instead affects the quality of the castings at this time; 2. When the existing casting device pours the melted metal material into the inside of the mold through a pipeline, it is easy to cause problems such as blockage and slow feeding speed of the metal material when entering the mold due to the setting of the pipeline inlet and its own structural shape. At the same time, the internal void cracks of the castings after casting are large, there are many bubbles, and the quality of the finished castings is low. Summary of the Invention

[0005] The object of the present invention is to provide a casting device and method for producing high-quality valve castings to solve the problems raised in the above-mentioned background art.

[0006] To achieve the above object of the invention, the present invention adopts the following technical solutions: The present invention provides a casting device for producing high-quality valve castings, including a device support and a casting box. The top of the device support is installed with an upper support by screws, and a casting box is arranged at the center of the top of the upper support. The casting device includes: a vibration demoulding mechanism installed inside the upper support; a casting mould installed inside the casting box, and the vibration demoulding mechanism extends to the left and right sides of the casting box. Among them, the vibration demoulding mechanism includes: an external gear disc movably connected to the top of the device support; a transmission gear meshed with the outside of the external gear disc; a one-way ratchet wheel rotatably connected inside the external gear disc; a screw rod demoulding assembly installed inside the one-way ratchet wheel and extending into the casting mould; a reciprocating vibration assembly installed on the top of the transmission gear and extending to the side of the casting box.

[0007] As a preferred solution of the present invention, a plurality of L-shaped baffles are installed at the eccentric position of the top of the upper support, and the casting box is installed and positioned inside the inner side of the L-shaped baffles. Among them, the left and right sides of the inner wall of the casting box protrude inward to form inner protrusions, and the casting mould is movably arranged on the side of the inner protrusions.

[0008] As a preferred solution of the present invention, the tooth part of the one-way ratchet wheel abuts against a ratchet block. The ratchet block is slidably connected to the eccentric position inside the external gear disc. A plurality of ratchet blocks are provided, and the inclined surfaces of the ratchet blocks are close to the inclined surfaces of the tooth parts of the one-way ratchet wheel. Among them, the bottom of the ratchet block is connected with a return spring, and the return spring is installed on the inner wall of the external gear disc.

[0009] As a preferred solution of the present invention, the screw rod demoulding assembly includes: a first driving source installed at the center of the bottom of the device support; a reciprocating screw rod connected to the output end of the first driving source; a lifting slider connected to the outside of the reciprocating screw rod through balls; demoulding rods installed on both sides of the top of the lifting slider. Among them, the reciprocating screw rod penetrates through the upper support and the external gear disc, a one-way ratchet wheel is fixedly installed on the outside of the reciprocating screw rod, and the top of the reciprocating screw rod is rotatably connected to the inner top of the upper support.

[0010] As a preferred embodiment of the present invention, the left and right sides of the lifting slider are slidably connected to the outside of the vertical guide rod, the vertical guide rod is installed inside the upper support, and the demolding rods are arranged on the left and right sides of the reciprocating lead screw. Among them, the demolding rod penetrates through the upper support and extends into the inside of the casting mold, a demolding head is installed at the top of the demolding rod, and the demolding head is movably arranged inside the casting mold.

[0011] As a preferred embodiment of the present invention, the reciprocating vibration assembly includes: a vertical connecting rod installed on the top of the transmission gear; a first bevel gear installed outside the vertical connecting rod; a transmission bevel gear set meshed with the first bevel gear; a second bevel gear meshed with the transmission bevel gear set; a transmission shaft rod installed inside the second bevel gear. Among them, the vertical connecting rod extends into the inside of the upper support, and the first bevel gear, the transmission bevel gear set, the second bevel gear and the transmission shaft rod are all movably arranged inside the upper support. Among them, two bevel gears are arranged inside the transmission bevel gear set, and the two bevel gears are coaxially connected.

[0012] As a preferred embodiment of the present invention, a transmission belt is connected to the outside of the transmission shaft rod through a synchronous pulley, the transmission belt extends to the top of the upper support, and a side connecting rod is connected to the inner side of the transmission belt through a synchronous pulley. Among them, the side connecting rod is movably arranged on the side of the casting box, a movable disc is installed on the side of the side connecting rod, and the movable disc is movably arranged at the edge of the top of the upper support.

[0013] As a preferred embodiment of the present invention, an eccentric rod is rotatably connected to the eccentric part on the side of the movable disc, a movable arm is connected to the side of the eccentric rod, and the bottom of the movable arm is rotatably connected inside the guide seat. Among them, the guide seat is installed on the inner bottom of the collision block, the collision block abuts against the side of the casting box, and a horizontal block is installed at the bottom of the collision block. Among them, the horizontal block is slidably connected to the outside of the horizontal guide rod, and the horizontal guide rod is installed on the top of the upper support.

[0014] As a preferred embodiment of the present invention, the casting mold includes: a casting lower mold base slidably arranged on the inner bottom of the casting box; a casting upper mold base arranged on the top of the casting lower mold base; a casting cavity arranged inside the casting lower mold base and the casting upper mold base; a casting inlay arranged inside the casting cavity; casting pipes installed at the inner edges of the casting upper mold base and the casting upper mold base. Among them, the casting cavity is communicated with the casting pipelines, and a plurality of casting pipelines are provided. A demolding head is movably arranged inside the casting cavity, and a demolding rod is slidably connected inside the lower casting die base. Among them, a plurality of exhaust holes are formed inside both the lower casting die base and the upper casting die base. The exhaust holes are communicated with the casting cavity, and a plurality of grasping parts are formed at the included angle at the top of the lower casting die base and the upper casting die base.

[0015] The present invention also provides a casting method for producing high-quality valve castings, including the following steps: S1. Fabrication of internal and external molds: Fabricate a casting replica model according to the part drawing, and use a suitable metal material. The quality of the model directly affects the subsequent accuracy and surface quality of the casting. Then, use the model to construct a mold in a sand box to determine the external shape of the casting and obtain a finished casting mold. S2. Melting of casting materials: Melt the metal material and adjust the composition inside the metal material. Strictly control the melting temperature, chemical composition, and gas content. Then, pour the melted metal material into the inside of the casting mold to perform the casting operation of the casting. S3. Cooling, solidification, and demolding treatment of the casting: The metal cools and solidifies in the casting mold to form a casting. The cooled metal casting realizes the demolding operation of the casting through the operation of the vibration demolding mechanism. Compared with the prior art, the above one or more technical solutions have the following beneficial effects: 1. In the casting device and method for producing high-quality valve castings, when directly demolding the completely cast invention casting, start the first driving source to drive the one-way ratchet to rotate in the reverse direction, drive the demolding head to move up and down (reciprocate), lift and raise the casting located inside the mold, and realize the direct demolding operation of the casting. When direct demolding is difficult due to the adhesion between the casting and the mold, start the first driving source to drive the one-way ratchet to rotate in the forward direction. On the one hand, it can make the demolding head return to the initial position, leaving enough vibration time for the subsequent movement and demolding of the demolding head. On the other hand, it can drive a plurality of collision blocks to knock and vibrate multiple positions on the inner wall of the casting box, accelerating the separation of the casting and the mold inside the casting box, and ensuring that the demolding head can more easily eject the casting. And the above mold demolding operation does not require much extrusion and ejection force, and is not easy to leave pits and depressions on the surface of the casting, ensuring the quality of the casting; In addition, in the present invention, bubbles in the mold can be effectively reduced during vibration, thereby reducing the pitted surface phenomenon on the surface of the casting and increasing the smoothness of the casting. 2. In the casting device and method for producing high-quality valve castings, through the design of the exhaust holes inside the casting lower die base and the casting upper die base, on the one hand, the air in the mold cavity can be discharged during the casting process, avoiding poor forming caused by gas compression. It can also greatly reduce the injection pressure, injection time, holding pressure time, and clamping pressure, making the forming of valve castings easier from difficult. On the other hand, it can play a certain role in promoting the diffusion of alloy elements in the casting, providing a diffusion channel for alloy elements, making it easier for alloy elements to diffuse from high-concentration areas to low-concentration areas, which helps to make the internal composition of the casting more uniform and improve the quality of the casting; 3. In the casting device and method for producing high-quality valve castings, through the casting pipes in multiple directions and positions inside the casting box and the casting mold, on the one hand, the efficiency of pouring the molten metal material into the inside of the casting mold during casting can be improved. On the other hand, the casting pipes at multiple positions can ensure that the molten metal material flows more uniformly in the casting cavity, reducing the problems of poor flow or local overheating of the molten metal material in the casting cavity, and ensuring the effect of the casting mold in casting and forming the internal casting; 4. In the casting device and method for producing high-quality valve castings, through the two feeding pipes and casting pipes with different slopes, on the one hand, it can cooperate with the feeding hopper to increase the feeding speed of the molten metal material. On the other hand, it can reduce the damage to the casting inlays inside the mold caused by the too-fast feeding speed when the molten metal material is feeding, ensuring the quality of the casting. In addition, the spiral feeding groove inside the feeding hopper can ensure that the molten metal material flows spirally, effectively reducing the stagnation and blockage of the molten metal material in the hopper, thereby improving the continuity and efficiency of feeding, and ensuring that the molten metal material is evenly distributed in the feeding hopper, avoiding the problems of poor feeding and blockage caused by accumulation; Brief Description of the Drawings

[0016] The schematic diagrams in the specification that form a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0017] In addition, the terms "install", "set", "provided with", "connected", "connected to", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0018] Figure 1 is the schematic structural diagram of the whole of the present invention; Figure 2 is the schematic structural view of the overall front view of the present invention; Figure 3 is the schematic structural view of the overall side view of the present invention; Figure 4 is the schematic structural view of the overall sectional view of the present invention; Figure 5 is the schematic structural view of the vibration demolding mechanism of the present invention; Figure 6 is the present invention Figure 5 the enlarged schematic structural view of area A therein; Figure 7 is the schematic structural view of the connection between the external gear disc and the reciprocating lead screw of the present invention; Figure 8 is the schematic structural view of the reciprocating vibration assembly of the present invention; Figure 9 is the schematic structural view of the connection between the external gear disc and the lead screw demolding assembly of the present invention; Figure 10 is the schematic sectional view of the connection between the casting box and the casting mold of the present invention; Figure 11 is the exploded view of the connection between the casting box and the casting mold of the present invention; Figure 12 is the schematic structural view of the connection between the casting pipe and the feeding funnel of the present invention; In the figure: 10, device support; 20, casting box; 201, inner protrusion; 30, upper support; 301, L-shaped baffle; 40, vibration demolding mechanism; 401, external gear disc; 402, transmission gear; 403, one-way ratchet; 4031, ratchet stop; 4032, return spring; 404, lead screw demolding assembly; 405, reciprocating vibration assembly; 4041, first driving source; 4042, reciprocating lead screw; 4043, lifting slider; 40431, vertical guide rod; 4044, demolding rod; 40441, demolding head; 4051, vertical connecting rod; 4052, first bevel gear; 4053, transmission bevel gear set; 4054, second bevel gear; 4055, transmission shaft rod; 40551, transmission belt; 40552, side connecting rod; 40553, movable disk; 40554, eccentric rod; 40555, movable arm; 40556, guide seat; 40557, collision block; 40558, horizontal block; 40559, horizontal guide rod; casting mold; 501, casting lower mold base; 502, casting upper mold base; 503, casting cavity; 504, casting insert; 505, casting pipe; 506, exhaust hole; 507, grasping part; 60. Blanking pipeline; 601. Blanking funnel; 602. Screw blanking chute. Detailed implementation mode

[0019] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application. Embodiment

[0020] Please refer to Figures 1 - 11 , a casting device for producing high-quality valve castings includes a device support 10 and a casting box 20. The top of the device support 10 is installed with an upper support 30 through screws. The center of the top of the upper support 30 is provided with a casting box 20. The casting device includes: a vibration demolding mechanism 40 installed inside the upper support 30; a casting mold 50 installed inside the casting box 20. The vibration demolding mechanism 40 extends to the left and right sides of the casting box 20. Among them, the vibration demolding mechanism 40 includes: an external gear disk 401 movably connected to the top of the device support 10; a transmission gear 402 meshingly connected to the outside of the external gear disk 401; a one-way ratchet 403 rotatably connected inside the external gear disk 401; a screw demolding assembly 404 installed inside the one-way ratchet 403 and extending into the casting mold 50; a reciprocating vibration assembly 405 installed on the top of the transmission gear 402 and extending to the side of the casting box 20.

[0021] In the present invention, a plurality of L-shaped baffles 301 are installed at the eccentric position of the top of the upper support 30. The casting box 20 is installed and positioned inside the inner side of the L-shaped baffles 301. Among them, the left and right sides of the inner wall of the casting box 20 protrude inward and form inner protrusions 201. The casting mold 50 is movably arranged on the side of the inner protrusion 201.

[0022] The above working principle: During the production and processing of valve castings, first, a corresponding casting mold 50 is manufactured according to the data of the valve casting. Then, the melted metal material is poured into the interior of the casting mold 50, and the casting is solidified and cooled and shaped inside the casting mold 50. After completing the above operations, the demolding process is carried out on the valve casting that has been shaped. At this time, first start the screw demolding assembly 404 to operate in the reverse direction, drive the one-way ratchet 403 to rotate in the reverse direction and the outer gear disc 401 does not rotate, and lift and raise the mold inside the casting mold 50. At the same time, when it is difficult to lift and raise the casting, start the screw demolding assembly 404 to operate in the forward direction, drive the one-way ratchet 403 to rotate in the forward direction and the outer gear disc 401 to rotate. On the one hand, drive the screw demolding assembly 404 back to the initial position to facilitate subsequent gradual lifting. On the other hand, it can synchronously drive the reciprocating vibration assembly 405 to operate, vibrate the casting mold 50 inside the casting box 20 and the casting inside it, so that the casting mold 50 and the casting are separated, and the screw demolding assembly 404 can more easily complete the demolding operation of the casting.

[0023] Specific reference Figure 7 , the tooth part of the one-way ratchet 403 abuts against the ratchet stopper 4031. The ratchet stopper 4031 is slidably connected to the eccentric part inside the outer gear disc 401. There are multiple ratchet stoppers 4031. The inclined surface of the ratchet stopper 4031 is close to the inclined surface of the tooth part of the one-way ratchet 403. Among them, the bottom of the ratchet stopper 4031 is connected with a return spring 4032, and the return spring 4032 is installed on the inner wall of the outer gear disc 401.

[0024] In the casting device for producing high-quality valve castings of the present invention, when the one-way ratchet 403 rotates forward, the vertical surface of the gear part of the one-way ratchet 403 will abut against the vertical surface of the ratchet stopper 4031 and drive the ratchet stopper 4031 and the outer gear disc 401 on which the ratchet stopper 4031 is installed to rotate forward; when the one-way ratchet 403 rotates in the reverse direction, the inclined surface of the gear part of the one-way ratchet 403 will abut against the inclined surface of the ratchet stopper 4031 and squeeze the ratchet stopper 4031 to move, squeezing the return spring 4032. At this time, the outer gear disc 401 will not rotate. Among them, the design of the return spring 4032 can ensure that the ratchet stopper 4031 always abuts against the side of the one-way ratchet 403.

[0025] Specific reference Figure 5 and Figure 9, the screw rod demoulding assembly 404 includes: a first driving source 4041 installed at the center of the bottom of the device support 10; a reciprocating screw rod 4042 connected to the output end of the first driving source 4041; a lifting slider 4043 connected to the outside of the reciprocating screw rod 4042 through balls; and demoulding rods 4044 installed on both sides of the top of the lifting slider 4043. Among them, the reciprocating screw rod 4042 passes through the upper support 30 and the external gear disk 401, a one-way ratchet 403 is fixedly installed on the outside of the reciprocating screw rod 4042, and the top of the reciprocating screw rod 4042 is rotatably connected to the inner top of the upper support 30.

[0026] In this solution, the left and right sides of the lifting slider 4043 are slidably connected to the outside of the vertical guide rod 40431, the vertical guide rod 40431 is installed inside the upper support 30, and the demoulding rods 4044 are arranged on the left and right sides of the reciprocating screw rod 4042. Among them, the demoulding rods 4044 pass through the upper support 30 and extend into the casting mold 50, a demoulding head 40441 is installed on the top of the demoulding rod 4044, and the demoulding head 40441 is movably arranged inside the casting mold 50.

[0027] In the above solution, through the design of the vertical guide rod 40431, the lifting movement of the lifting slider 4043 can be guided to ensure that the demoulding rod 4044 and the demoulding head 40441 installed on the top of the lifting slider 4043 can perform lifting movement, and the casting in contact with the top of the demoulding head 40441 can be lifted and jacked up to realize the demoulding operation of the casting.

[0028] In the casting device for producing high-quality valve castings of the present invention, when demoulding the casting, the first driving source 4041 is started to operate, driving the reciprocating screw rod 4042 connected to the output end of the first driving source 4041 to rotate. When the reciprocating screw rod 4042 rotates, on the one hand, it can drive the one-way ratchet 403 installed on its outside to rotate, and on the other hand, it drives the lifting slider 4043 connected to its outside through balls to perform lifting movement (reciprocating).

[0029] In the present invention, the first driving source 4041 is preferably a stepping motor.

[0030] For specific reference Figure 5 、 Figure 6 、 Figure 7 and Figure 8, the reciprocating vibration assembly 405 includes: a vertical connecting rod 4051 installed on the top of the transmission gear 402; a first bevel gear 4052 installed outside the vertical connecting rod 4051; a transmission bevel gear set 4053 meshed and connected with the first bevel gear 4052; a second bevel gear 4054 meshed and connected with the transmission bevel gear set 4053; a transmission shaft rod 4055 installed inside the second bevel gear 4054. Among them, the vertical connecting rod 4051 extends into the upper support 30, and the first bevel gear 4052, the transmission bevel gear set 4053, the second bevel gear 4054 and the transmission shaft rod 4055 are all movably arranged inside the upper support 30. Among them, two bevel gears are arranged inside the transmission bevel gear set 4053, and the two bevel gears are coaxially connected.

[0031] In this solution, a transmission belt 40551 is connected to the outside of the transmission shaft rod 4055 through a synchronous pulley. The transmission belt 40551 extends to the top of the upper support 30. A side connecting rod 40552 is connected to the inner side of the transmission belt 40551 through a synchronous pulley. Among them, the side connecting rod 40552 is movably arranged on the side of the casting box 20, and a movable disk 40553 is installed on the side of the side connecting rod 40552. The movable disk 40553 is movably arranged at the edge of the top of the upper support 30.

[0032] In the above solution, when the transmission shaft rod 4055 rotates, the transmission belt 40551 connected to its outside through the synchronous pulley will operate, and then drive the side connecting rod 40552 connected to the inner side of the transmission belt 40551 through the synchronous pulley to rotate. When the side connecting rod 40552 rotates, the movable disk 40553 installed on its side will also rotate.

[0033] In the casting device for producing high-quality valve castings of the present invention, when the transmission gear 402 rotates, the vertical connecting rod 4051 connected to its top will rotate, and the first bevel gear 4052 installed outside the vertical connecting rod 4051 will rotate. When the first bevel gear 4052 rotates, the transmission bevel gear set 4053 meshed and connected to its outside will operate, and the second bevel gear 4054 meshed and connected to the side of the transmission bevel gear set 4053 will rotate, and synchronously drive the transmission shaft rod 4055 installed inside the second bevel gear 4054 to rotate.

[0034] For specific reference Figure 8, an eccentric rod 40554 is rotatably connected to the eccentric part on the side of the movable disk 40553. An movable arm 40555 is connected to the side of the eccentric rod 40554. The bottom of the movable arm 40555 is rotatably connected to the inside of the guide seat 40556. Among them, the guide seat 40556 is installed on the inner bottom of the collision block 40557. The collision block 40557 abuts against the side of the casting box 20. A horizontal block 40558 is installed at the bottom of the collision block 40557. Among them, the horizontal block 40558 is slidably connected to the outside of the horizontal guide rod 40559. The horizontal guide rod 40559 is installed on the top of the upper support 30.

[0035] In the casting device for producing high-quality valve castings of the present invention, when the movable disk 40553 rotates, the eccentric rod 40554 and the movable arm 40555 rotatably connected to the eccentric part on its side will operate, so that the guide seat 40556 and the collision block 40557 rotatably connected to the bottom of the movable arm 40555 will move back and forth, vibrating and colliding with the casting box 20 arranged on the side of the collision block 40557, realizing the vibration treatment of the castings inside the casting box 20 and the casting mold 50, and the castings are more likely to be separated from the casting mold 50.

[0036] Specific reference Figure 10 and Figure 11 , the casting mold 50 includes: a casting lower mold base 501 slidably arranged on the inner bottom of the casting box 20; a casting upper mold base 502 arranged on the top of the casting lower mold base 501; a casting cavity 503 arranged inside the casting lower mold base 501 and the casting upper mold base 502; a casting inlay 504 arranged inside the casting cavity 503; casting pipes 505 installed at the inner edges of the casting upper mold base 502 and the casting upper mold base 502. Among them, the casting cavity 503 is communicated with the casting pipes 505. There are multiple casting pipes 505. A demolding head 40441 is movably arranged inside the casting cavity 503. A demolding rod 4044 is slidably connected to the inside of the casting lower mold base 501. Among them, a plurality of exhaust holes 506 are opened inside the casting lower mold base 501 and the casting upper mold base 502. The exhaust holes 506 are communicated with the casting cavity 503. A plurality of grasping parts 507 are opened at the included angle between the top of the casting lower mold base 501 and the casting upper mold base 502.

[0037] In the casting device for producing high-quality valve castings of the present invention, when demolding the casting, first, the mechanical claw is used to move the upper casting mold base 502 out of the interior of the casting box 20. After that, the demolding head 40441 rises to lift the casting on its top, realizing the demolding operation of the casting. Among them, when casting the casting, the casting insert 504 inside the casting cavity 503 can be used as the filler for the hollow part inside the valve casting to realize the casting operation of the valve casting. At the same time, multiple casting pipes 505 arranged in multiple directions can, on the one hand, improve the casting effect of the casting, and on the other hand, ensure that the molten metal flows more uniformly in the casting cavity 503, reducing problems such as poor flow or local overheating, and the casting efficiency is high.

[0038] In the present invention, the lower casting mold base 501 and the upper casting mold base 502 are connected by screws. Embodiment 1

[0039] Please refer to Figures 1 - 11 , a casting method for producing high-quality valve castings, including the following steps: S1. Fabrication of internal and external molds: Make a casting replica model according to the part drawing, using a suitable metal material. The quality of the model directly affects the subsequent accuracy and surface quality of the casting. After that, use the model to construct a mold in the sand box to determine the external shape of the casting, and obtain the finished casting mold 50. S2. Melting of casting materials: Melt the metal material and adjust the composition inside the metal material, strictly control the melting temperature, chemical composition, and gas content. After that, pour the melted metal material into the interior of the casting mold 50 to carry out the casting operation of the casting. S3. Cooling, solidification, and demolding treatment of the casting: The metal cools and solidifies in the casting mold 50 to form a casting. The cooled metal casting realizes the demolding operation of the casting through the operation of the vibration demolding mechanism 40. Embodiment 2

[0040] On the basis of the above embodiment, it is found during use that when pouring the casting material into the interior of the casting cavity 503 through the casting pipe 505, some metal materials (after melting) are likely to accumulate inside the casting pipe 505. At this time, although the subsequent material extrusion ensures that this part of the accumulated material will be extruded into the interior of the casting cavity 503, the gaps between the metal materials located inside the casting cavity 503 are relatively large, and there are more air bubbles inside the casting after casting, and the quality of the casting is poor.

[0041] Therefore, specifically refer to Figure 12, the casting pipe 505 is set to be inclined, and a blanking pipe 60 is welded to the top of the inclined casting pipe 505. The blanking pipe 60 is set to be inclined, and the inclination angle of the blanking pipe 60 is greater than that of the casting pipe 505. Among them, a blanking funnel 601 is welded to the top of the blanking pipe 60, and a spiral blanking groove 602 is formed on the inner wall of the blanking funnel 601.

[0042] In the casting device for producing high-quality valve castings of the present invention, through the casting pipe 505 and the blanking pipe 60 with different inclination directions, on the one hand, the speed of the metal material (after melting) during blanking can be increased, ensuring that the molten metal can flow evenly in the mold, reducing the internal stress of the molten metal during movement inside the mold, and improving the structural integrity of the casting. On the other hand, the two-stage discharging pipes can reduce the impact force of the metal material colliding with the casting cavity 503 while ensuring the blanking speed, and ensure that the inner wall material of the casting cavity 503 is not damaged when the metal material is blanking. Among them, the design of the spiral blanking groove 602 inside the blanking funnel 601 enables the metal material to form a continuous spiral flow inside the blanking funnel 601. This flow pattern can effectively reduce the stagnation and blockage of the material in the funnel, thereby improving the continuity and efficiency of blanking, and enabling the metal material to be evenly distributed inside the blanking funnel 601, avoiding local accumulation and over-concentration, and avoiding the problems of poor blanking and blockage caused by local accumulation.

[0043] Limited to this, any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent replacements or changes, should be covered within the protection scope of the present invention.

Claims

1. A casting device for producing high-quality valve castings, comprising a device support (10) and a casting box (20), characterized in that: The top of the device support (10) is installed with an upper support (30) by screws, and a casting box (20) is arranged at the center of the top of the upper support (30). The casting device includes: a vibration demolding mechanism (40) installed inside the upper support (30); a casting mold (50) installed inside the casting box (20), and the vibration demolding mechanism (40) extends to the left and right sides of the casting box (20). Among them, the vibration demolding mechanism (40) includes: an external gear disk (401) movably connected to the top of the device support (10); a transmission gear (402) meshed and connected to the outside of the external gear disk (401); a one-way ratchet (403) rotatably connected inside the external gear disk (401); a screw rod demolding assembly (404) installed inside the one-way ratchet (403) and extending into the casting mold (50); a reciprocating vibration assembly (405) installed on the top of the transmission gear (402) and extending to the side of the casting box (20).

2. The casting device for producing high-quality valve castings according to claim 1, characterized in that: A plurality of L-shaped baffles (301) are installed at the eccentric position of the top of the upper support (30), and the casting box (20) is installed and positioned inside the inner side of the L-shaped baffles (301). Among them, the left and right sides of the inner wall of the casting box (20) protrude inward and form inner protrusions (201), and the casting mold (50) is movably arranged on the side of the inner protrusions (201).

3. The casting device for producing high-quality valve castings according to claim 1, characterized in that: The tooth part of the one-way ratchet (403) abuts against a ratchet stop block (4031), the ratchet stop block (4031) is slidably connected to the eccentric position inside the external gear disk (401), a plurality of ratchet stop blocks (4031) are provided, and the inclined surface of the ratchet stop block (4031) is close to the inclined surface of the tooth part of the one-way ratchet (403). Among them, the bottom of the ratchet stop block (4031) is connected with a return spring (4032), and the return spring (4032) is installed on the inner wall of the external gear disk (401).

4. A casting device for producing high-quality valve castings according to claim 1, characterized in that: The screw rod demolding assembly (404) includes: a first driving source (4041) installed at the center of the bottom of the device support (10); a reciprocating screw rod (4042) connected to the output end of the first driving source (4041); a lifting slider (4043) connected to the outside of the reciprocating screw rod (4042) through balls; demolding rods (4044) installed on both sides of the top of the lifting slider (4043). Among them, the reciprocating screw rod (4042) penetrates through the upper support (30) and the external gear disk (401), a one-way ratchet (403) is fixedly installed on the outside of the reciprocating screw rod (4042), and the top of the reciprocating screw rod (4042) is rotatably connected to the inner top of the upper support (30).

5. The casting device for producing high-quality valve castings according to claim 4, wherein: The left and right sides of the lifting slider (4043) are slidably connected to the outside of a vertical guide rod (40431), the vertical guide rod (40431) is installed inside the upper support (30), and the demolding rods (4044) are arranged on the left and right sides of the reciprocating screw rod (4042). Among them, the demolding rod (4044) penetrates through the upper support (30) and extends into the interior of the casting mold (50). A demolding head (40441) is installed at the top of the demolding rod (4044), and the demolding head (40441) is movably arranged inside the casting mold (50).

6. The casting device for producing high-quality valve castings according to claim 1, characterized in that: The reciprocating vibration assembly (405) includes: a vertical connecting rod (4051) installed on the top of the transmission gear (402); a first bevel gear (4052) installed outside the vertical connecting rod (4051); a transmission bevel gear set (4053) meshed and connected with the first bevel gear (4052); a second bevel gear (4054) meshed and connected with the transmission bevel gear set (4053); a transmission shaft rod (4055) installed inside the second bevel gear (4054), Among them, the vertical connecting rod (4051) extends into the interior of the upper support (30), and the first bevel gear (4052), the transmission bevel gear set (4053), the second bevel gear (4054) and the transmission shaft rod (4055) are all movably arranged inside the upper support (30). Among them, two bevel gears are arranged inside the transmission bevel gear set (4053), and the two bevel gears are coaxially connected.

7. The casting device for producing high-quality valve castings according to claim 6, characterized in that: A transmission belt (40551) is connected to the outside of the transmission shaft rod (4055) through a synchronous pulley. The transmission belt (40551) extends to the top of the upper support (30). A side connecting rod (40552) is connected to the inner side of the transmission belt (40551) through a synchronous pulley. Among them, the side connecting rod (40552) is movably arranged on the side of the casting box (20). A movable disk (40553) is installed on the side of the side connecting rod (40552), and the movable disk (40553) is movably arranged at the edge of the top of the upper support (30).

8. A casting device for producing high-quality valve castings according to claim 7, characterized in that: An eccentric rod (40554) is rotatably connected to the eccentric part on the side of the movable disk (40553). An activity arm (40555) is connected to the side of the eccentric rod (40554). The bottom of the activity arm (40555) is rotatably connected inside the guide seat (40556). Among them, the guide seat (40556) is installed at the inner bottom of the collision block (40557). The collision block (40557) abuts against the side of the casting box (20). A horizontal block (40558) is installed at the bottom of the collision block (40557). Among them, the horizontal block (40558) is slidably connected to the outside of the horizontal guide rod (40559), and the horizontal guide rod (40559) is installed on the top of the upper support (30).

9. The casting device for producing high-quality valve castings according to claim 5, characterized in that: The casting mold (50) includes: a casting lower mold base (501) slidably arranged at the inner bottom of the casting box (20); a casting upper mold base (502) arranged on the top of the casting lower mold base (501); a casting cavity (503) arranged inside the casting lower mold base (501) and the casting upper mold base (502); a casting insert (504) arranged inside the casting cavity (503); and a casting pipe (505) installed at the inner edges of the casting upper mold base (502) and the casting upper mold base (502). Among them, the casting cavity (503) is communicated with the casting pipe (505), a plurality of the casting pipes (505) are provided, a demolding head (40441) is movably arranged inside the casting cavity (503), and a demolding rod (4044) is slidably connected inside the casting lower mold base (501). Among them, a plurality of exhaust holes (506) are formed inside both the casting lower mold base (501) and the casting upper mold base (502), the exhaust holes (506) are communicated with the casting cavity (503), and a plurality of gripping portions (507) are formed at the included angle between the tops of the casting lower mold base (501) and the casting upper mold base (502).

10. A casting method for producing high-quality valve castings, for a casting device for producing high-quality valve castings according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Fabrication of the inner and outer molds: Fabricate a casting replica model according to the part drawing, use a suitable metal material. The quality of the model directly affects the accuracy and surface quality of the subsequent casting. Then, use the model to construct a mold in a sand box to determine the external shape of the casting, and obtain the finished casting mold (50). S2. Melting of the casting material: Melt the metal material and adjust the internal components of the metal material. Strictly control the melting temperature, chemical composition, and gas content. Then, pour the melted metal material into the inside of the casting mold (50) to perform the casting operation of the casting. S3. Cooling, solidification, and demolding treatment of the casting: The metal cools and solidifies in the casting mold (50) to form a casting. The cooled metal casting realizes the demolding operation of the casting through the operation of the vibration demolding mechanism (40).

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