An integrated cast water-cooled steel core

Abstract

The application discloses a one-piece cast water-cooled steel core, a release agent injection pipe device comprises an injection pipe and a liquid collecting box, the liquid collecting box sprays release agent to the inner wall of a semicircular arc-shaped outer mold plate and a bottom mold through side spray holes and a trumpet-shaped bottom spray opening respectively, an elastic plugging mechanism is arranged in the trumpet-shaped bottom spray opening, a hydraulic rod is used for pushing a pushing rod device to ascend and descend, and the elastic plugging mechanism can be separated from the trumpet-shaped bottom spray opening when the pushing rod device ascends. During the descending process of the injection pipe, the release agent is uniformly sprayed to the inner wall of the semicircular arc-shaped outer mold plate from the side spray holes, when descending to the limit position, the release agent is accurately sprayed to the inner wall of the bottom mold from the trumpet-shaped bottom spray opening, the whole spraying process does not need manual intervention, and the spraying time sequence of the side wall and the bottom mold is automatically separated, so that the release agent is prevented from being excessive or insufficient in the bottom mold area; the pushing rod device is lowered and the bottom injection joint is plugged after casting, so that the casting liquid is prevented from entering the deep part of the bottom injection joint and being solidified and adhered, and the smoothness of demolding is further ensured.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, specifically to an integrated cast water-cooled steel core. Background Technology

[0002] In the metal mold casting process, the steel core is a key component that forms the inner cavity of the casting. Its surface needs to be pre-sprayed with a release agent so that the casting can be easily demolded after solidification.

[0003] Traditional cast steel cores typically employ an integral structure, which can easily lead to the steel core sticking to the casting during demolding, resulting in difficulty in demolding or even damage to the casting. To solve this problem, existing technologies use two integrally formed steel cores spliced ​​together for easy opening. Before casting, a release agent needs to be sprayed onto the inner wall of the steel core. The application of the release agent usually relies on manual hand-held spray guns, which results in problems such as uneven spraying, low efficiency, and a poor operating environment.

[0004] Furthermore, for bottom-pouring casting systems, after the molten casting enters the mold cavity, molten casting is prone to remain at the bottom-pouring joint. After solidification, it adheres to the bottom of the steel core or the bottom mold, further increasing the difficulty of demolding. At the same time, the casting gate (riser) part requires a cumbersome subsequent separate removal process with low automation. Although there are some automated spraying devices in the existing technology, they are often complex in structure, inconvenient to control, and cannot accurately control the amount of release agent used on the bottom mold and sidewalls, which can easily lead to too much or too little release agent in some areas.

[0005] Therefore, there is an urgent need for an integrated cast water-cooled steel core that can achieve uniform and automated spraying of release agent and effectively avoid difficulties in demolding the steel core and adhesion of the bottom injection joint. Summary of the Invention

[0006] (a) Technical problems to be solved This invention provides an integral cast water-cooled steel core, which aims to solve the problems mentioned in the background art. To achieve the above objectives, the present invention provides the following technical solution:

[0007] An integrated cast water-cooled steel core includes a liquid storage tank, a support frame, a lifting cylinder, a steel core body, a bottom mold and a top mold, and also includes a release agent injection pipe, a liquid storage tank, a bottom injection joint and a casting liquid inlet pipe; The bottom mold is fixedly installed on the liquid storage tank. The bottom of the bottom mold is connected to a bottom injection connector. One side of the bottom injection connector is connected to the casting liquid inlet pipe. The casting liquid inlet pipe is used to inject casting liquid into the bottom injection connector. The steel core body is located on the upper part of the bottom mold. The steel core body is composed of two semi-circular outer templates spliced ​​together. A cavity for the molten casting to enter is formed between the two semi-circular outer templates. The support frame is fixedly installed on the liquid storage tank. Side pull cylinders are fixedly installed on both sides of the support frame. The piston shaft of the side pull cylinder is fixedly connected to the semi-circular outer template at the corresponding position. The top mold cover is located on the upper part of the steel core body. A through hole is opened in the middle of the top mold. The mold release agent injection pipe is slidably installed in the through hole. A first lifting cylinder and a second lifting cylinder for controlling the lifting of the top mold and the mold release agent injection pipe are respectively fixedly installed on the support frame. The storage tank is fixedly installed on one side of the support frame. The mold release agent injection fitting includes an injection pipe and a collection box. The injection pipe is inserted into the cavity through a through hole. The collection box is fixedly installed at the lower end of the injection pipe. Multiple side spray holes are evenly opened along the circumference on the outer surface of the collection box. A trumpet-shaped bottom spray nozzle is provided at the bottom of the collection box. The storage tank is connected to the upper end of the injection pipe through a hose. The collection box sprays mold release agent onto the semi-circular outer template and the inner wall of the bottom template through the side spray holes and the trumpet-shaped bottom spray nozzle. The horn-shaped bottom nozzle is provided with an elastic sealing mechanism, which is used to seal the horn-shaped bottom nozzle. The bottom of the injection joint is connected to a sleeve, and a push rod is slidably provided inside the sleeve. A hydraulic rod is fixedly installed at the bottom of the sleeve. The hydraulic rod is used to push the push rod to rise and fall. When the push rod rises, it can disengage the elastic sealing mechanism from the trumpet-shaped bottom nozzle.

[0008] As a preferred technical solution of this application, the top of the top mold is provided with two risers symmetrically opened on the axis, and a cutting cylinder is fixedly installed on both sides of the top mold. A slide is opened on both sides of the top mold and connected to the riser at the corresponding position. A cutting plate is slidably installed in the slide, and one end of the cutting plate is fixedly connected to the piston shaft of the cutting cylinder at the corresponding position.

[0009] As a preferred technical solution of this application, the elastic sealing mechanism includes a concave cylinder, a blocking ball, and a spring. The concave cylinder is connected to the top of the trumpet-shaped bottom nozzle. The blocking ball is movably locked at the lower end of the concave cylinder. A piston is slidably provided inside the concave cylinder. The spring is located inside the concave cylinder. The piston presses down on the blocking ball by the elastic force of the spring. Liquid outlet holes are opened on both sides of the concave cylinder at the blocking ball position.

[0010] As a preferred technical solution of this application, the push rod includes a push rod and a conical head. The push rod is inserted into the sleeve through a bottom injection connector. The sleeve surface is provided with a drain hole. The conical head is fixedly installed on the upper end of the push rod. The conical head has a conical structure that is narrow at the top and thick at the bottom. The cross-sectional dimension of the upper end of the conical head is smaller than the cross-sectional dimension of the ball plug.

[0011] As a preferred technical solution of this application, the outer diameter of the lower end of the conical mandrel corresponds to the inner diameter of the bottom injection joint, and the conical mandrel can be used to seal the bottom injection joint.

[0012] As a preferred technical solution of this application, a sealing ring is sleeved on the surface of the push rod, and the lower end of the push rod is fixedly connected to the piston shaft of the hydraulic rod. When the push rod rises to the limit position, the sealing ring seals the lower end of the bottom injection joint.

[0013] As a preferred technical solution of this application, there are two second lifting cylinders, and a lifting plate is fixedly installed on the upper end of the injection pipe. The piston shafts of the two second lifting cylinders are respectively fixedly connected to both ends of the lifting plate.

[0014] As a preferred technical solution of this application, the end of the cutting plate near the riser is provided with an inclined surface.

[0015] As a preferred technical solution of this application, the semi-circular outer template is provided with two parallel and interconnected cooling channels, which are respectively connected to an external water inlet pipe and a water outlet pipe.

[0016] As a preferred technical solution of this application, the bottom of the top mold has a receiving opening at the through hole position, and the receiving opening is used to receive the liquid collection box. This invention features a liftable mold release agent injection pipe with side spray holes evenly spaced along the circumference of its lower collection box. Combined with a bottom elastic sealing mechanism, and through automatic control of a second lifting cylinder and hydraulic system, the mold release agent is evenly sprayed from the side spray holes onto the inner wall of the semi-circular outer mold plate during the descent of the injection pipe. When it reaches its limit position, the push rod automatically pushes open the blocking ball, allowing the mold release agent to be precisely sprayed from the trumpet-shaped bottom spray nozzle onto the inner wall of the bottom mold. The entire spraying process requires no manual intervention, and the spraying sequence of the side wall and the bottom mold is automatically separated, preventing excessive or insufficient mold release agent in the bottom mold area.

[0017] The push rod descends after casting and seals the bottom injection joint, preventing the molten casting from entering the depth of the bottom injection joint, solidifying and sticking together, and further ensuring smooth demolding. The top mold has a riser and is equipped with a cutting plate driven by a cutting cylinder. After the top mold lifts the casting, the solidified material head in the riser can be automatically cut off directly without manual hammering or gas cutting, which improves production efficiency and safety. Attached Figure Description

[0018] Figure 1 A schematic diagram of a one-piece cast water-cooled steel core; Figure 2 A cross-sectional view of a one-piece cast water-cooled steel core; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 This is a structural diagram of a push rod component in a one-piece cast water-cooled steel core. Figure 6 This is a structural diagram of the steel core body in a one-piece cast water-cooled steel core.

[0019] In the picture: 100. Liquid storage tank; 200. Support frame; 210. First lifting cylinder; 220. Second lifting cylinder; 300. Steel core body; 310. Semi-circular outer template; 311. Cooling channel; 320. Bottom mold; 400. Top mold; 410. Riser; 420. Receiving port; 430. Slide rail; 440. Cutting cylinder; 441. Cutting plate; 500. Release agent injection pipe; 510. Injection pipe; 520. Liquid collection box; 521. Side spray hole; 522. Trumpet-shaped bottom spray nozzle; 530. Concave cylinder; 531. Liquid outlet hole; 532. Plug ball; 533. Piston; 534. Spring; 600. Storage tank; 700. Bottom injection joint; 710. Sleeve; 720. Hydraulic rod; 730. Push rod; 731. Push rod; 732. Conical push head; 733. First sealing ring; 734. Drain hole; 800. Side pull cylinder; 900. Casting liquid inlet pipe. Detailed Implementation

[0020] 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.

[0021] See figure Figure 6 As shown, the present invention provides an integrated cast water-cooled steel core, including a liquid storage tank 100, a support frame 200, a lifting cylinder 210, a steel core body 300, a bottom mold 320 and a top mold 400, and also includes a release agent injection pipe 500, a release agent tank 600, a bottom injection joint 700 and a casting liquid inlet pipe 900; The bottom mold 320 is fixedly installed on the liquid storage tank 100. The bottom of the bottom mold 320 is connected to the bottom injection connector 700. One side of the bottom injection connector 700 is connected to the casting liquid inlet pipe 900. The casting liquid inlet pipe 900 is used to inject casting liquid into the bottom injection connector 700. The steel core body 300 is located on the top of the bottom mold 320. The steel core body 300 is composed of two semi-circular outer templates 310 spliced ​​together. A cavity for the molten casting to enter is formed between the two semi-circular outer templates 310. The support frame 200 is fixedly installed on the liquid storage tank 100. Side pull cylinders 800 are fixedly installed on both sides of the support frame 200. The piston shaft of the side pull cylinder 800 is fixedly connected to the corresponding semi-circular outer template 310. The top mold 400 is installed on the upper part of the steel core body 300. A through hole is opened in the middle of the top mold 400. The release agent injection pipe 500 is slidably installed in the through hole. The support frame 200 is fixedly installed with a first lifting cylinder 210 and a second lifting cylinder 220 for controlling the lifting of the top mold 400 and the release agent injection pipe 500. Specifically, a lifting frame is installed on the support frame 200. The lifting frame has two sliding rods, which are fixedly connected to the upper end of the top mold 400. A support plate is fixedly installed on the upper end of the two sliding rods. The support plate is located above the support frame 200. The first lifting cylinder 210 is fixedly installed on the support frame 200, and its piston shaft is fixedly connected to the support plate. This structure is existing technology and will not be described in detail here.

[0022] The storage tank 600 is fixedly installed on one side of the support frame 200. The release agent injection pipe 500 includes an injection pipe 510 and a collection box 520. The injection pipe 510 is inserted into the cavity through a through hole. The collection box 520 is fixedly installed at the lower end of the injection pipe 510. Multiple side spray holes 522 are evenly opened along the circumference on the outer surface of the collection box 520. The bottom of the collection box 520 is provided with a trumpet-shaped bottom spray nozzle 522. The storage tank 600 is connected to the upper end of the injection pipe 510 through a hose. The collection box 520 sprays release agent onto the inner wall of the semi-circular outer template 310 and the bottom template 320 through the side spray holes 521 and the trumpet-shaped bottom spray nozzle 522 respectively. The horn-shaped bottom nozzle 522 is provided with an elastic sealing mechanism, which is used to seal the horn-shaped bottom nozzle 522. The bottom of the bottom injection connector 700 is connected to a sleeve 710. A push rod 730 is slidably provided inside the sleeve 710. A hydraulic rod 720 is fixedly installed at the bottom of the sleeve 710. The hydraulic rod 720 is used to push the push rod 730 up and down. When the push rod 730 rises, it can disengage the elastic sealing mechanism from the trumpet-shaped bottom nozzle 522.

[0023] In this embodiment, the top of the top mold 400 is provided with two risers 410 that are symmetrically opened on the axis. Both sides of the top mold 400 are fixedly installed with cutting cylinders 440. Both sides of the top mold 400 are provided with slides 430 that are connected to the risers 410 at the corresponding positions. A cutting plate 441 is slidably installed in the slides 430. One end of the cutting plate 441 is fixedly connected to the piston shaft of the cutting cylinder 440 at the corresponding position.

[0024] In this embodiment, the elastic sealing mechanism includes a concave cylinder 530, a plugging ball 532, and a spring 534. The concave cylinder 530 is connected to the top of the trumpet-shaped bottom nozzle 522. The plugging ball 532 is movably locked at the lower end of the concave cylinder 530. A piston 533 is slidably provided inside the concave cylinder 530. The spring 534 is located inside the concave cylinder 530. The piston 533 presses down on the plugging ball 532 under the elastic force of the spring 534. Liquid outlet holes 531 are opened on both sides of the concave cylinder 530 at the position of the plugging ball 532.

[0025] In this embodiment, the push rod 730 includes a push rod 731 and a conical push head 732. The push rod 731 is inserted into the sleeve 710 through the bottom injection connector 700. The sleeve 710 has a drain hole 734 on its surface. The conical push head 732 is fixedly installed on the upper end of the push rod 731. The conical push head 732 has a conical structure that is narrow at the top and thick at the bottom. The conical push head 732 can be made of rubber. The cross-sectional dimension of the upper end of the conical push head 732 is smaller than the cross-sectional dimension of the ball stopper 532.

[0026] In this embodiment, the outer diameter of the lower end of the tapered top 732 corresponds to the inner diameter of the bottom injection connector 700, and the tapered top 732 can be used to seal the bottom injection connector 700.

[0027] Furthermore, in this embodiment, a sealing ring 733 is fitted on the surface of the push rod 731, and the lower end of the push rod 731 is fixedly connected to the piston shaft of the hydraulic rod 720. When the push rod 731 rises to the limit position, the sealing ring 733 seals the lower end of the bottom injection joint 700 to prevent the casting liquid from flowing out from the bottom of the bottom injection joint 700 when the casting liquid enters.

[0028] In order to smoothly raise and lower the injection pipe 510 and facilitate the entry of the release agent, in this embodiment, two second lifting cylinders 220 are provided. A lifting plate is fixedly installed on the upper end of the injection pipe 510, and the piston shafts of the two second lifting cylinders 220 are fixedly connected to both ends of the lifting plate.

[0029] Furthermore, in this embodiment, the cutting plate 441 has an inclined surface at one end near the riser 410, which can cut the material formed in the riser.

[0030] Furthermore, in order to facilitate the rapid cooling of the steel core body 300 and enable the workpiece to be formed quickly, in this embodiment, the semi-circular outer template 310 is provided with two parallel and interconnected cooling channels 311, which are respectively connected to the external water inlet pipe and the water outlet pipe.

[0031] To reduce the influence of the shape of the liquid collection box 520 on the forming of the workpiece, in this embodiment, the bottom of the top mold 400 is provided with a receiving opening 420 at the through hole position, and the receiving opening 420 is used to receive the liquid collection box 520.

[0032] In this embodiment, all hydraulic cylinders (including the first lifting cylinder 210, the second lifting cylinder 220, the side-pulling cylinder 800, the cutting cylinder 440, and the hydraulic rod 720) are driven by a centralized hydraulic station. This hydraulic station includes a motor, an oil pump, an oil tank, a relief valve, a pressure gauge, and multiple solenoid directional valves (preferably three-position four-way solenoid directional valves with a neutral-position pressure-holding function). The rodless chamber and rod chamber of each cylinder are connected to the corresponding solenoid directional valve's working ports A and B via hydraulic hoses.

[0033] The specific steps are as follows: Before casting, the pumps on the second lifting cylinder 220 and the storage tank 600 are started first. The pumps fill the injection pipe 510 with the release agent. The second lifting cylinder 220 can drive the injection pipe 510 to rise and fall, so that the release agent is evenly sprayed onto the inner wall of the semi-circular outer template 310 through the side spray hole 521. When the injection pipe 510 descends to its limit position, its plug ball 532 contacts the conical top 732. The conical top 732 can lift the plug ball 532. At this time, the release agent can be sprayed onto the upper part of the bottom mold 320 through the trumpet-shaped bottom nozzle 522. When the injection pipe 510 rises, the trumpet-shaped bottom nozzle 522 can be resealed under the elastic force of the spring 534. This step can effectively prevent excessive release agent from being sprayed on the bottom mold 320. The liquid storage tank 100 stores the casting liquid. The casting liquid is injected into the mold cavity through the pressurization equipment and the casting liquid inlet pipe 900. When the mold cavity is full, the hydraulic rod 720 is activated to retract, which can lower the ejector rod 731. Its conical ejector head 732 can seal the bottom injection joint 700 to prevent the casting liquid from sticking to the bottom injection joint 700 after solidification, which facilitates the subsequent demolding work and the removal of the workpiece. The molten casting inside the bottom-fill joint 700 can be discharged through the drain port; After the molten casting is formed, the side-pulling cylinder 800 is activated to open the two semi-circular outer templates 310. Then, the first lifting cylinder 210 is activated to raise the top mold 400. As the stored liquid enters the riser 410, the molten casting solidifies in the riser. The top mold 400 will then lift the workpiece. The cutting cylinder 440 is then activated, and the solidified material in the riser can be cut off through the cutting plate 441, making it easier for the workers to remove the workpiece from the top mold 400.

[0034] 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 one-piece cast water-cooled steel core, comprising a liquid storage tank, a support frame, a lifting cylinder, a steel core body, a bottom mold, and a top mold, characterized in that: It also includes mold release agent injection pipes, storage tanks, bottom injection joints, and casting liquid inlet pipes; The bottom mold is fixedly installed on the liquid storage tank. The bottom of the bottom mold is connected to a bottom injection connector. One side of the bottom injection connector is connected to the casting liquid inlet pipe. The casting liquid inlet pipe is used to inject casting liquid into the bottom injection connector. The steel core body is located on the upper part of the bottom mold. The steel core body is composed of two semi-circular outer templates spliced ​​together. A cavity for the molten casting to enter is formed between the two semi-circular outer templates. The support frame is fixedly installed on the liquid storage tank. Side pull cylinders are fixedly installed on both sides of the support frame. The piston shaft of the side pull cylinder is fixedly connected to the semi-circular outer template at the corresponding position. The top mold cover is located on the upper part of the steel core body. A through hole is opened in the middle of the top mold. The mold release agent injection pipe is slidably installed in the through hole. A first lifting cylinder and a second lifting cylinder for controlling the lifting of the top mold and the mold release agent injection pipe are respectively fixedly installed on the support frame. The storage tank is fixedly installed on one side of the support frame. The mold release agent injection fitting includes an injection pipe and a collection box. The injection pipe is inserted into the cavity through a through hole. The collection box is fixedly installed at the lower end of the injection pipe. Multiple side spray holes are evenly opened along the circumference on the outer surface of the collection box. A trumpet-shaped bottom spray nozzle is provided at the bottom of the collection box. The storage tank is connected to the upper end of the injection pipe through a hose. The collection box sprays mold release agent onto the semi-circular outer template and the inner wall of the bottom template through the side spray holes and the trumpet-shaped bottom spray nozzle. The horn-shaped bottom nozzle is provided with an elastic sealing mechanism, which is used to seal the horn-shaped bottom nozzle. The bottom of the injection joint is connected to a sleeve, and a push rod is slidably provided inside the sleeve. A hydraulic rod is fixedly installed at the bottom of the sleeve. The hydraulic rod is used to push the push rod to rise and fall. When the push rod rises, it can disengage the elastic sealing mechanism from the trumpet-shaped bottom nozzle.

2. The integral cast water-cooled steel core according to claim 1, characterized in that: The top of the top mold has two risers symmetrically arranged on the axis. A cutting cylinder is fixedly installed on both sides of the top mold. A slide is opened on both sides of the top mold and connected to the riser at the corresponding position. A cutting plate is slidably installed in the slide. One end of the cutting plate is fixedly connected to the piston shaft of the cutting cylinder at the corresponding position.

3. The integral cast water-cooled steel core according to claim 1, characterized in that: The elastic sealing mechanism includes a concave cylinder, a blocking ball, and a spring. The concave cylinder is connected to the top of the trumpet-shaped bottom nozzle. The blocking ball is movably locked at the lower end of the concave cylinder. A piston is slidably provided inside the concave cylinder. The spring is located inside the concave cylinder. The piston presses down on the blocking ball by the spring force. Liquid outlet holes are opened on both sides of the concave cylinder at the blocking ball position.

4. The integral cast water-cooled steel core according to claim 3, characterized in that: The push rod includes a push rod and a conical push head. The push rod is inserted into the sleeve through a bottom injection connector. The sleeve has a drain hole on its surface. The conical push head is fixedly installed on the upper end of the push rod. The conical push head has a conical structure that is narrow at the top and thick at the bottom. The cross-sectional dimension of the upper end of the conical push head is smaller than the cross-sectional dimension of the ball plug.

5. The integral cast water-cooled steel core according to claim 4, characterized in that: The outer diameter of the lower end of the conical mandrel corresponds to the inner diameter of the bottom injection joint, and the conical mandrel can be used to seal the bottom injection joint.

6. The integral cast water-cooled steel core according to claim 4, characterized in that: A sealing ring is fitted on the surface of the push rod, and the lower end of the push rod is fixedly connected to the piston shaft of the hydraulic rod. When the push rod rises to the limit position, the sealing ring seals the lower end of the bottom injection joint.

7. The integral cast water-cooled steel core according to claim 1, characterized in that: There are two second lifting cylinders. A lifting plate is fixedly installed on the upper end of the injection pipe. The piston shafts of the two second lifting cylinders are fixedly connected to both ends of the lifting plate.

8. The integral cast water-cooled steel core according to claim 2, characterized in that: The cutting plate has an inclined surface at one end near the riser.

9. The integral cast water-cooled steel core according to claim 1, characterized in that: The semi-circular outer template has two parallel and interconnected cooling channels inside, which are respectively connected to the external water inlet pipe and water outlet pipe.

10. The integral cast water-cooled steel core according to claim 1, characterized in that: The bottom of the top mold has a receiving opening at the through hole position, which is used to receive the liquid collection box.

Images