Metal casting demolding apparatus

Abstract

The application relates to the technical field of metal casting, and discloses a metal casting demolding equipment, which solves the problem that in the casting of copper alloy pipe fittings, the metal pipe fittings are round in surface and are easy to be embedded into a mold during demolding, are difficult to be effectively taken out through a clamp, and are easy to be deformed due to uneven stress, thereby affecting product quality. Through the setting of a demolding push block and a control mechanism, after the copper is cooled and shaped, the demolding push block automatically separates the pipe body from the mold groove during mold plate separation, manual intervention is not needed, instability and potential damage caused by manual operation are avoided, in addition, the equipment can uniformly apply force during demolding, effectively prevents the pipe body from being locally deformed due to stress concentration, and ensures the overall quality and consistency of the product.

Description

Technical Field

[0001] This invention relates to the field of metal casting technology, specifically to a metal casting demolding device. Background Technology

[0002] Copper alloys are widely used in the casting of metal pipe fittings, such as faucets and connecting pipes, due to their excellent wear resistance, corrosion resistance, and antibacterial properties. In the casting process, a sand mold is typically used to fill the mold cavity, creating a gap between the sand mold and the mold. Molten copper, then poured into this gap at high temperature, is then cooled and solidified to form the metal pipe fitting.

[0003] However, after metal pipe fittings are formed, they need to be demolded, that is, removed from the mold. When casting metal pipe fittings using gravity casting, the problem of the metal pipe fitting becoming embedded in one side of the mold often occurs. In this case, it is usually necessary to remove it manually with the help of pliers. However, because the surface of the metal pipe fitting is relatively rounded with few protruding structures, it is difficult for the pliers to form an effective clamping point on the surface of the metal pipe fitting. In addition, the surface hardness of the newly formed metal pipe fitting is low, and when using pliers for demolding, it is easy to cause deformation of the surface of the metal pipe fitting, thereby affecting the overall quality of the product. Summary of the Invention

[0004] The purpose of this invention is to provide a metal casting demolding device that solves the problem in the casting of copper alloy pipe fittings that, due to the rounded surface of the metal pipe fittings, they are easily embedded in the mold during demolding, making them difficult to remove effectively with clamps, and they are prone to deformation due to uneven force, which affects product quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a metal casting demolding device, comprising a mold, the mold including two movable and merged templates, the templates having mold grooves on their sides, the mold grooves on the two templates merging to form the external shape of the pipe body, a sand core being clamped inside the mold grooves to form the inner wall shape of the pipe body, a push groove being provided inside the templates, a demolding push block being slidably disposed in the push grooves, the demolding push block being disposed at one end of the mold grooves to clamp the sand core and the edge of the pipe body after forming; The mold is also equipped with a control mechanism, which includes a coordination component and a mating component respectively disposed on the inner sides of the two templates. The coordination component and the mating component are respectively connected to the ejection blocks on the corresponding templates. The coordinating component works in conjunction with the cooperating component to control the two ejector blocks to maintain the clamping state of the pipe body when the two templates are separated, and to cause the pipe body to detach horizontally from the mold grooves on both sides and be located in the middle of the two templates.

[0006] As a further description of the above technical solution: the two templates are respectively provided with assembly holes for assembling the coordinating component and the mating component, and the two assembly holes are connected to each other.

[0007] As a further description of the above technical solution: the coordination component includes a movable column and a tension spring sleeved on the surface of the movable column. One side of the movable column is fixedly connected to the corresponding ejector block through a side frame. The movable column is set in the corresponding assembly hole. The tension spring has a tendency to pull the movable column to move elastically in the direction of the mating component.

[0008] As a further description of the above technical solution: a spindle is coaxially rotatably arranged inside the movable column, and a stop block is fixedly arranged at one end of the spindle near the mating component.

[0009] As a further description of the above technical solution: the mating component includes a second movable column and a second tension spring sleeved on the surface of the second movable column. One side of the second movable column is fixedly connected to another ejector block through a second side frame. The second movable column is disposed in another assembly hole. The second tension spring has a tendency to elastically move the second movable column towards the first movable column.

[0010] As a further description of the above technical solution: the movable column two is fixedly connected to a snap-fit ​​cover near the movable column one. The snap-fit ​​cover has a snap-fit ​​cover inside and an insertion hole that connects to the inside of the snap-fit ​​groove on its side surface. The insertion hole corresponds to the shape of the abutment block.

[0011] As a further description of the above technical solution: a torsion spring is sleeved on the end of the mandrel away from the mating component, and a handle is fixedly connected thereto; a rotating block is fixedly connected to the arc surface of the movable column; a limit block is fixedly connected to the end of the movable column away from the mating component; the limit block cooperates with the rotating block to guide the abutment block and the through hole to mate.

[0012] As a further description of the above technical solution: the part of the ejector block used to clamp the pipe body is set to the shape of the edge of the pipe body, while the part used to clamp the sand core is adapted to the arc surface of the sand core.

[0013] As a further description of the above technical solution: the ejector blocks are arranged in two sets, one above the other, and the other below the sand core. The control mechanism corresponding to the sand core is also arranged in two sets.

[0014] As a further description of the above technical solution: it includes a machine base, and a hydraulic cylinder is connected to one side of the template through an assembly plate. The hydraulic cylinder is assembled on the machine base, and the two templates are merged or separated on the machine base through corresponding hydraulic cylinders.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. By setting the ejector block and control mechanism, after the copper water cools and solidifies, the ejector block automatically and smoothly removes the pipe body from the mold groove during the template separation process, without the need for manual intervention. This avoids the instability and potential damage caused by manual operation. In addition, the equipment can apply force evenly during the demolding process, effectively preventing the pipe body from undergoing local deformation due to stress concentration, thus ensuring the overall quality and consistency of the product.

[0016] 2. The design of the ejector blocks to match the edge shape of the pipe body allows them to function as molds during the cooling and shaping stage, further reducing burrs and improving the one-piece molding effect of the pipe body. At the same time, the two sets of ejector blocks correspond to the upper and lower edges of the sand core, providing uniform support for the pipe body and ensuring that it is subjected to balanced force when it leaves the mold groove, avoiding deformation caused by uneven stress. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mold disassembly structure of the present invention; Figure 3 This is a schematic diagram of the template and sand core structure of the present invention; Figure 4 This is a schematic diagram of the mold and control mechanism structure of the present invention; Figure 5 This is a schematic diagram of the ejector block and control mechanism of the present invention; Figure 6 This is a schematic diagram of the coordination component structure of the present invention; Figure 7 This is a side view of the coordination component of the present invention; Figure 8 This is a schematic diagram of the mating component structure of the present invention; Figure 9 This is a schematic diagram of the mold and machine tool structure of the present invention.

[0018] In the diagram: 10. Mold; 11. Template; 12. Mold groove; 13. Push groove; 14. Funnel cover; 15. Assembly plate; 16. Hydraulic cylinder; 17. Machine base; 20. Demolding push block; 30. Control mechanism; 31. Coordination component; 311. Movable column one; 312. Tension spring one; 313. Mandrel; 314. Abutment block; 315. Torsion spring; 316. Rotating block; 317. Limiting block; 318. Handle; 319. Side frame one; 32. Mating component; 321. Movable column two; 322. Tension spring two; 323. Snap-fit ​​cover; 324. Snap-fit ​​groove; 325. Through hole; 326. Side frame two; 40. Sand core; 50. Pipe body. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0021] Combination Figures 1-9 A metal casting demolding device includes a mold 10, which comprises two movable and merged templates 11. The templates 11 have mold grooves 12 on their sides. The mold grooves 12 on the two templates 11 merge to form the external shape of the pipe body 50. In addition, one side of the mold groove 12 is connected to the outer surface of the template 11 and serves as a liquid injection port. Molten copper after high-temperature melting is injected into the inner side of the mold groove 12 through the liquid injection port. A funnel cover 14 is also provided on the outer side of the liquid injection port to guide the molten copper to be smoothly injected into the inner side of the mold groove 12.

[0022] The sand core 40 is clamped inside the mold groove 12 to form the inner wall shape of the pipe body 50. The gap formed between the sand core 40 and the mold groove 12 is the structure of the pipe body 50. When the molten copper fills the gap and is cooled, the pipe body 50 will be formed. In the gravity casting process, the template 11 is initially inclined, so that the injection port is also inclined, so that the molten copper flows in from one side of the injection port, and the air remaining in the mold groove 12 can be discharged from the other side of the injection port, thereby avoiding the phenomenon of voids.

[0023] The template 11 has a push groove 13 inside, and a demolding push block 20 is slidably disposed in the push groove 13. The demolding push block 20 is disposed at one end of the mold groove 12 and is used to clamp the sand core 40 and the edge of the pipe body 50 after molding. The mold 10 is also equipped with a control mechanism 30. The control mechanism 30 includes a coordination component 31 and a mating component 32 respectively disposed on the inner sides of the two templates 11. The two templates 11 are respectively provided with assembly holes for assembling the coordination component 31 and the mating component 32. The two assembly holes are connected to each other. The coordination component 31 and the mating component 32 are respectively connected to the ejector blocks 20 on the corresponding templates 11. The coordination component 31 and the mating component 32 are coordinated to cause the two ejector blocks 20 to clamp the sand core 40 and the pipe body 50. Combination Figures 1-5The coordinating component 31 includes a movable column 311 and a tension spring 312 sleeved on the surface of the movable column 311. One side of the movable column 311 is fixedly connected to the corresponding ejector block 20 through a side frame 319. The movable column 311 is set in the corresponding assembly hole. One end of the tension spring 312 is fixedly connected to the inner wall of the assembly hole, and the other end is fixedly connected to one end of the movable column 311. The tension spring 312 has a tendency to pull the movable column 311 to move elastically in the direction of the mating component 32. The movable column 311, under the elastic pull of the tension spring 312, will also drive the corresponding ejector block 20 to move in a preset direction.

[0024] The movable column 311 has a spindle 313 rotatably mounted coaxially inside, and a stop block 314 is fixedly mounted on one end of the spindle 313 near the mating component 32.

[0025] The mating assembly 32 includes a second movable column 321 and a second tension spring 322 sleeved on the surface of the second movable column 321. One side of the second movable column 321 is fixedly connected to another ejector block 20 via a second side bracket 326. The second movable column 321 is disposed in another assembly hole. The second tension spring 322 has a tendency to elastically pull the second movable column 321 toward the first movable column 311. The first movable column 311, the second movable column 321, and the corresponding template 11 have the same and symmetrical assembly relationship.

[0026] The movable column 2 321 is fixedly connected to a snap-fit ​​cover 323 near the movable column 1 311. The snap-fit ​​cover 323 has a snap-fit ​​cover 323 inside and an insertion hole 325 on its side surface that communicates with the inside of the snap-fit ​​groove 324. The insertion hole 325 corresponds to the shape of the abutment block 314.

[0027] Specifically, before the two templates 11 are joined, the through hole 325 and the abutment block 314 are misaligned. After the two templates 11 are joined, the through hole 325 and the abutment block 314 are in abutting position, thus achieving the desired connection. Figures 3-5 At this time, the two ejector blocks 20 do not clamp the sand core 40, and the copper liquid can be smoothly injected into the mold groove 12 through the injection port. Furthermore, after the copper liquid is injected, by rotating the mandrel 313, the abutment block 314 enters the inner side of the snap-fit ​​groove 324 through the insertion hole 325. At this time, the tension spring 1 312 and tension spring 2 322 push the corresponding movable column 1 311 and movable column 2 321 to move towards each other. At the same time, the two ejector blocks 20 will also clamp on the surface of the sand core 40. After the abutment block 314 enters the inner side of the snap-fit ​​groove 324, the mandrel 313 is rotated again to make the abutment block 314 still maintain the misalignment state with the insertion hole 325. After a period of waiting, once the copper in the mold groove 12 has cooled and solidified, the two mold plates 11 are initially separated. Since the abutment block 314 is misaligned inside the snap-fit ​​groove 324 and the through hole 325, the movable column 2 321 and the movable column 1 311 are connected to each other. Therefore, the two ejector blocks 20 also maintain the state of clamping the pipe body 50 and the sand core 40. Thus, during the separation of the two mold plates 11, the pipe body 50 is clamped by the two ejector blocks 20 and located in the middle of the two mold plates 11. It automatically detaches from the mold groove 12 of the two mold plates 11 without manual intervention. Then, the movement of the mold plates 11 is stopped, and the rotating mandrel 313 is controlled to cause the abutment block 314 to detach from the through hole 325, so that the snap-fit ​​cover 323 and the abutment block 314 separate. Then, the two mold plates 11 are moved to separate, and the two ejector blocks 20 can automatically release the clamp, so that the pipe body 50 is also automatically released.

[0028] It should be noted that before the ejector block 20 releases the pipe body 50, a receiving structure, such as a pallet, can be placed under the pipe body 50 to prevent the pipe body 50 from falling too high and causing damage from gravity impact.

[0029] Combination Figures 5-6 The mandrel 313 is fitted with a torsion spring 315 at the end away from the mating component 32, and a handle 318 is fixedly connected thereto. The rotation of the mandrel 313 can be controlled by the handle 318. A rotating block 316 is fixedly connected to the arc surface of the movable column 311. A limiting block 317 is fixedly connected to the end of the movable column 311 away from the mating component 32. The limiting block 317 cooperates with the rotating block 316 to guide the abutment 314 and the insertion hole 325 to mate.

[0030] Specifically, the spring force of the torsion spring 315 forces the mandrel 313 to be in a misaligned state between the abutment 314 at one end and the through hole 325 under normal conditions. The rotating block 316 and the limiting block 317 cooperate to limit the rotation angle of the mandrel 313. After the mandrel 313 rotates to the maximum angle from the initial state, the abutment 314 and the through hole 325 are in a corresponding state. This makes it easier to control the connection state between the snap-fit ​​cover 323 and the mandrel 313, so as to further control the clamping state of the ejector block 20 on the tube body 50.

[0031] Combination Figure 5 The portion of the ejector block 20 used to hold the pipe body 50 is shaped to fit the edge of the pipe body 50, while the portion used to hold the sand core 40 is adapted to the arc surface of the sand core 40. This design allows the ejector block 20 to also function as a mold structure for shaping the edge of the pipe body 50 during the gradual cooling and solidification process of the pipe body 50 from molten copper, and to reduce the generation of burrs on the edge of the pipe body 50, resulting in a better integral molding effect for the pipe body 50.

[0032] Combination Figures 1-4 Two sets of ejector blocks 20 are arranged vertically, corresponding to the upper and lower edges of the sand core 40, respectively. Two sets of control mechanisms 30 corresponding to the sand core 40 are also arranged. The arrangement of the two sets of ejector blocks 20 ensures a uniform supporting force on the pipe body 50, allowing the pipe body 50 to be pushed out of the mold groove 12 by the ejector blocks 20. This more even pushing force avoids stress concentration, preventing localized deformation of the pipe body 50 and further affecting the production quality of the pipe body 50.

[0033] Combination Figure 9 The system includes a machine base 17. One side of the template 11 is connected to a hydraulic cylinder 16 via an assembly plate 15. The hydraulic cylinder 16 is mounted on the machine base 17. The two templates 11 are merged or separated on the machine base 17 via the corresponding hydraulic cylinders 16.

[0034] Workflow: During the operation of the metal casting demolding equipment, the two mold plates 11 are merged under the drive of the hydraulic cylinder 16, and the sand core 40 is clamped inside the mold groove 12 to form the inner wall shape of the pipe body 50. Then, molten copper is smoothly injected into the mold groove 12 through the injection port under the guidance of the funnel cover 14. As the molten copper fills the gap between the sand core 40 and the mold groove 12, by rotating the mandrel 313, the abutment block 314 enters the inner side of the snap-fit ​​groove 324. The tension spring 1 312 and tension spring 2 322 push the movable column 1 311 and movable column 2 321 to move towards each other, and the two demolding push blocks 20 then clamp the sand core 40 and the edge of the pipe body 50.

[0035] After the molten copper has completely cooled and solidified, the hydraulic cylinder 16 drives the template 11 to initially separate. Because the abutment 314 and the through hole 325 remain misaligned, the first movable column 311 and the second movable column 321 remain connected. The ejector block 20 clamps the pipe body 50, causing it to detach from the mold groove 12 from the middle. Subsequently, the mandrel 313 is rotated again, causing the abutment 314 to disengage from the through hole 325. The snap-fit ​​cover 323 separates from the abutment 314, the template 11 continues to separate, the ejector block 20 automatically releases its clamping grip, and the pipe body 50 is successfully released.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A metal casting demolding device, comprising a mold (10), the mold (10) comprising two movable and merged templates (11), wherein the templates (11) have mold grooves (12) on their sides, the mold grooves (12) on the two templates (11) are merged to form the external shape of a pipe body (50), and a sand core (40) is clamped inside the mold grooves (12) to form the inner wall shape of the pipe body (50), characterized in that: The template (11) has a push groove (13) inside, and a demolding push block (20) is slidably arranged in the push groove (13). The demolding push block (20) is arranged at one end of the mold groove (12) and is used to clamp the sand core (40) and the edge of the pipe body (50) after molding. The mold (10) is also equipped with a control mechanism (30). The control mechanism (30) includes a coordination component (31) and a mating component (32) respectively disposed on the inner sides of the two templates (11). The coordination component (31) and the mating component (32) are respectively connected to the ejection push block (20) on the corresponding template (11). The coordination component (31) cooperates with the mating component (32) to control the two ejector blocks (20) to still hold the pipe body (50) when the two templates (11) are separated from each other, and to cause the pipe body (50) to be horizontally disengaged from the mold grooves (12) on both sides and located in the middle of the two templates (11). The coordinating component (31) includes a movable column (311) and a tension spring (312) sleeved on the surface of the movable column (311). One side of the movable column (311) is fixedly connected to the corresponding ejector block (20) through a side frame (319). The movable column (311) is set in the corresponding assembly hole. The tension spring (312) has a tendency to pull the movable column (311) to move elastically towards the mating component (32). The movable column (311) is coaxially rotatably provided with a spindle (313), and a stop block (314) is fixedly provided at one end of the spindle (313) near the mating component (32). The mating assembly (32) includes a second movable column (321) and a second tension spring (322) sleeved on the surface of the second movable column (321). One side of the second movable column (321) is fixedly connected to another ejector block (20) through a side frame (326). The second movable column (321) is set in another assembly hole. The second tension spring (322) has a tendency to pull the second movable column (321) to move elastically towards the first movable column (311). The movable column 2 (321) is fixedly connected to a snap-fit ​​cover (323) at one end near the movable column 1 (311). The snap-fit ​​cover (323) has a snap-fit ​​cover (323) inside and an insertion hole (325) connected to the inside of the snap-fit ​​groove (324) on its side surface. The insertion hole (325) corresponds to the shape of the abutment block (314). The mandrel (313) is fitted with a torsion spring (315) at the end away from the mating component (32) and is fixedly connected to a handle (318). The movable column (311) is fixedly connected to a rotating block (316) on its arc surface. The movable column (311) is fixedly connected to a limiting block (317) at the end away from the mating component (32). The limiting block (317) cooperates with the rotating block (316) to guide the abutment block (314) and the through hole (325) to mate.

2. The metal casting demolding equipment according to claim 1, characterized in that: The two templates (11) are respectively provided with assembly holes for assembling the coordination component (31) and the mating component (32), and the two assembly holes are connected to each other.

3. The metal casting demolding equipment according to claim 2, characterized in that: The part of the ejector block (20) used to hold the pipe body (50) is set to the shape of the edge of the pipe body (50), while the part used to hold the sand core (40) is adapted to the arc surface of the sand core (40).

4. The metal casting demolding equipment according to claim 3, characterized in that: The ejector blocks (20) are arranged in two sets, one above the other. The two sets of ejector blocks (20) correspond to the upper and lower edges of the sand core (40) respectively. The control mechanism (30) corresponding to the sand core (40) is also arranged in two sets.

5. A metal casting demolding device according to claim 4, characterized in that: Includes a machine base (17), one side of the template (11) is connected to a hydraulic cylinder (16) via an assembly plate (15), the hydraulic cylinder (16) is mounted on the machine base (17), and the two templates (11) are merged or separated on the machine base (17) via the corresponding hydraulic cylinder (16).

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