Engine cylinder head casting core making device

Abstract

The application belongs to the technical field of foundry core making, in particular to an engine cylinder head foundry core making device, which comprises a rotatable rotating frame, eight fixed molds are rotatably installed in the rotating frame through a pushing mechanism, the pushing mechanism is used to push the fixed molds to switch between horizontal and vertical states, four movable molds are arranged outside the rotating frame, a pushing piece is installed on the side of the movable mold away from the fixed mold, a sand shooter is arranged above the movable mold, a lifting piece is fixedly connected to the top surface of the sand shooter, and L-shaped support plates are fixedly connected to the outside of the pushing piece and the lifting piece; through the design that the eight fixed molds correspond to the four movable molds, the switching work of the fixed molds can be completed by rotating 45 degrees after each processing, so that the core making work can still be carried out during the demolding operation of the fixed molds, and the production and manufacturing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of core making, in particular to an engine cylinder head core making device. BACKGROUND

[0002] The core making machine, also known as a core shooting machine, is a special equipment for manufacturing sand cores in the casting industry. Its principle is to use compressed air to spray core sand into the mold cavity through a special sand hopper, so that the core sand is rapidly solidified and formed. It is divided into hot core boxes and cold core boxes, suitable for complex mold production, and can produce high-precision sand cores.

[0003] The automobile engine is the core component of the automobile, and the precision requirement for production and processing is extremely high. Therefore, when the engine cylinder head is cast, a core making machine is needed to manufacture sand cores for casting to ensure the integrity and accuracy of the internal structure of the casting.

[0004] The production process of the core making machine in the prior art is mostly consistent. First, the movable mold moves and is connected with the fixed mold, then the sand shooting mechanism is lowered and connected with the sand shooting hole reserved on the mold, and the core making operation is performed. After the core making is completed, the sand shooting mechanism is first moved up, then the movable mold and the fixed mold are separated, and then the fixed mold is demolded, so that a core making operation is completed. However, in actual use, when the fixed mold is demolded, the sand shooting mechanism and the movable mold are in standby state, that is, the sand shooting mechanism and the movable mold do not produce useful work at this time, which does not meet the requirements of lean production and the production efficiency is low.

[0005] Therefore, the application provides an engine cylinder head core making device. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical scheme adopted by the application to solve the technical problems is: the engine cylinder head core making device comprises a rotatable rotating frame, eight fixed molds are rotatably installed in the rotating frame by a pushing mechanism, the pushing mechanism is used to switch the fixed molds between horizontal and vertical states, four movable molds are arranged outside the rotating frame, a pushing piece is arranged on the side of the movable mold away from the fixed mold, a sand shooting machine is arranged above the movable mold, a lifting piece is fixedly connected to the top surface of the sand shooting machine, and L-shaped support plates are fixedly connected to the outside of the pushing piece and the lifting piece.

[0008] Preferably, the pushing mechanism comprises eight hollow blocks fixedly connected to the inside of the rotating frame, support rods are fixedly connected between every two of the eight hollow blocks, mounting blocks are rotatably connected to the outside of the support rods, push-pull mechanisms are mounted at the bottom ends of the mounting blocks, the push-pull mechanisms are used to reciprocatingly push and pull the mounting blocks, and the mounting blocks are fixedly connected with the fixed molds.

[0009] Preferably, the push-pull mechanism comprises a connecting rod rotatably connected to the bottom of the mounting block, a limiting ball rotatably connected to the side of the connecting rod away from the mounting block, a limiting block slidably connected to the outside of the limiting ball, four inner grooves evenly arranged on the outside of the limiting block, and four movable molds staggered with the four inner grooves.

[0010] Preferably, the limiting block comprises a pair of cover plates and a sliding block fixedly connected to the inside of the pair of cover plates, a limiting groove is arranged in the inside of the sliding block, the limiting groove is protruded at the corresponding position of the inner groove, the limiting groove is recessed at the non-corresponding position of the inner groove, and the limiting ball is slidably connected to the inside of the limiting groove.

[0011] Preferably, the bottom end of the rotating frame is fixedly connected with a rotating rod, the outside of the rotating rod is fixedly connected with a rotating bearing, and the rotating bearing is fixedly connected with the limiting block.

[0012] Preferably, the outside of the cover plate is fixedly connected with four extrusion plates, the side close to the extrusion plate of the hollow block is fixedly connected with a hollow capsule, the top end of the hollow block is rotatably connected with an expansion plate, the bottom surface of the expansion plate is fixedly connected with a spray head, and the spray head is communicated with the hollow capsule.

[0013] Preferably, the inside of the hollow block is fixedly connected with an elastic film, a flow guide pipe is connected through the hollow capsule and the hollow block, the top end of the hollow capsule is fixedly connected with an air inlet pipe, one-way valves are arranged in the inside of the flow guide pipe and the air inlet pipe, the top end of the elastic film is fixedly connected with an air outlet pipe, and the diameter of the air outlet pipe is smaller than that of the flow guide pipe.

[0014] Preferably, the bottom surface of the elastic film is fixedly connected with a plurality of elastic tethering ropes, and the end away from the elastic film of the elastic tethering rope is fixedly connected with a counterweight ball.

[0015] Preferably, a rotary groove is arranged in the inside of the mounting block, and the two ends of the rotary groove are fixedly connected with connecting pipes.

[0016] Preferably, an annular material receiving plate is arranged below the rotating frame, and the annular material receiving plate is concave.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The engine cylinder head casting core making device disclosed by the present application, by designing eight fixed molds corresponding to four movable molds, the switching work of the fixed mold can be completed by rotating 45 degrees after each processing, so that the core making work can still be carried out during the demolding operation of the fixed mold, and the production efficiency is improved.

[0019] 2. The engine cylinder head casting core device, the limiting groove is wavy and arranged on the surface of the sliding block, when the fixed mold is in the vertical state, the limiting ball is located at the bottom of the limiting groove, when the fixed mold is in the horizontal state, the limiting ball is located at the top of the limiting groove, the design can effectively improve the stability of the equipment, and the effect that the posture of the fixed mold is automatically changed to facilitate various working operations is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings.

[0021] Figure 1 is a perspective view of the application;

[0022] Figure 2 is a bottom view of the application;

[0023] Figure 3 is a structural schematic view of the L-shaped support plate in the application;

[0024] Figure 4 is a structural schematic view of the hollow block in the application;

[0025] Figure 5 is a structural schematic view of the extrusion plate in the application;

[0026] Figure 6 is a structural schematic view of the limiting groove in the application;

[0027] Figure 7 is a structural sectional view of the hollow block in the application;

[0028] Figure 8 is a structural schematic view of the limiting ball in the application.

[0029] In the figure: 1, rotating frame; 2, fixed mold; 3, movable mold; 4, pushing piece; 5, sand shooting machine; 6, lifting piece; 7, L-shaped support plate; 8, support rod; 9, mounting block; 10, connecting rod; 11, limiting ball; 12, limiting block; 1201, cover plate; 1202, sliding block; 1203, limiting groove; 13, rotating rod; 14, rotating bearing; 15, extrusion plate; 16, hollow capsule; 17, hollow block; 18, telescopic plate; 19, nozzle; 20, elastic film; 21, exhaust pipe; 22, flow guide pipe; 23, air inlet pipe; 24, elastic tethering rope; 25, counterweight ball; 26, connecting pipe; 27, annular material receiving plate. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, purposes and effects of the application easy to understand, the application will be further described below in combination with the specific embodiments.

[0031] AsFigures 1 to 8 The engine cylinder head casting core device comprises a rotatable rotating frame 1, eight fixed molds 2 are rotatably installed in the rotating frame 1 through a pushing mechanism, the pushing mechanism is used to switch the fixed molds 2 between horizontal and vertical states, four movable molds 3 are arranged outside the rotating frame 1, a pushing piece 4 is arranged on the side of the movable mold 3 away from the fixed mold 2, a sand shooting machine 5 is arranged above the movable mold 3, a lifting piece 6 is fixedly connected to the top surface of the sand shooting machine 5, and L-shaped support plates 7 are fixedly connected to the outside of the pushing piece 4 and the lifting piece 6.

[0032] When the engine cylinder head sand core is manufactured by using the engine cylinder head casting core device, raw materials are first fed into the sand shooting machine 5, then the pushing piece 4 is started to drive the movable mold 3 to move towards the fixed mold 2 until the fixed mold 2 and the movable mold 3 are attached to each other to form a complete mold, then the lifting piece 6 is started to drive the sand shooting machine 5 to descend and be attached to the mold formed by the fixed mold 2 and the movable mold 3, and then the sand shooting machine 5 is started to inject the raw materials into the mold to form a sand core, thereby completing the core manufacturing operation.

[0033] The pushing mechanism comprises eight hollow blocks 17 fixed in the rotating frame 1, support rods 8 are fixed between every two of the eight hollow blocks 17, mounting blocks 9 are rotatably connected to the outside of the support rods 8, a push-pull mechanism is mounted at the bottom end of the mounting block 9, the push-pull mechanism is used to reciprocally push and pull the mounting block 9, and the mounting block 9 is fixedly connected to the fixed mold 2.

[0034] When the engine cylinder head sand core is manufactured by using the engine cylinder head casting core device, raw materials are first fed into the sand shooting machine 5, then the pushing piece 4 is started to drive the movable mold 3 to move towards the fixed mold 2 until the fixed mold 2 and the movable mold 3 are attached to each other to form a complete mold, then the lifting piece 6 is started to drive the sand shooting machine 5 to descend and be attached to the mold formed by the fixed mold 2 and the movable mold 3, and then the sand shooting machine 5 is started to inject the raw materials into the mold to form a sand core, thereby completing the core manufacturing operation.

[0035] The push-pull mechanism comprises a connecting rod 10 rotatably connected to the bottom of the mounting block 9, a limiting ball 11 rotatably connected to the side of the connecting rod 10 away from the mounting block 9, and a limiting block 12 slidably connected to the outside of the limiting ball 11, wherein the outside of the limiting block 12 is uniformly provided with four inner grooves, and the four inner grooves are staggered with the four movable molds 3;

[0036] In use, the rotating frame 1 is rotated to drive the hollow block 17 to rotate, the hollow block 17 drives the supporting rod 8 to rotate, and the supporting rod 8 drives the mounting block 9 to move. At this time, the mounting block 9 drives the connecting rod 10 and the limiting ball 11 to move. Since the limiting ball 11 is slidably connected to the inside of the limiting block 12, the limiting ball 11 will slide along the shape of the limiting block 12 during the rotation of the mounting block 9. By virtue of the fact that the limiting block 12 is provided with the four inner grooves, the limiting ball 11 will drive the four movable molds 3 to reciprocatingly push and pull the fixed mold 2 during the reciprocating extension and retraction of the limiting ball 11 along the surface of the limiting block 12, so that the posture of the fixed mold 2 is automatically adjusted to facilitate core making and demolding. Figure 3 -Appendix Figure 6 It can be known that, during the rotation of the limiting ball 11, the limiting ball 11 will reciprocatingly extend and retract along the surface of the limiting block 12, that is, reciprocatingly push and pull the fixed mold 2, so that the posture of the fixed mold 2 is automatically adjusted to facilitate core making and demolding.

[0037] The limiting block 12 comprises a pair of cover plates 1201 and a sliding block 1202 fixedly connected to the inside of the pair of cover plates 1201, wherein the inside of the sliding block 1202 is provided with a limiting groove 1203, the limiting groove 1203 is protruded at the position corresponding to the inner groove, and the limiting groove 1203 is recessed at the position corresponding to the non-inner groove. The limiting ball 11 is slidably connected to the inside of the limiting groove 1203.

[0038] During the adjustment of the fixed mold 2 from the vertical state to the horizontal state, the rotating connection position of the mounting block 9 and the connecting rod 10 is constantly changed. Therefore, the limiting groove 1203 is designed, and the rotating bearing 14 is fixedly connected to the limiting block 12. Figure 6 It can be seen that the limiting groove 1203 is wavelike on the surface of the sliding block 1202. When the fixed mold 2 is in the vertical state, the limiting ball 11 is located at the bottom end of the limiting groove 1203. When the fixed mold 2 is in the horizontal state, the limiting ball 11 is located at the top end of the limiting groove 1203. This design can effectively improve the stability of the equipment operation, so that the posture of the fixed mold 2 is automatically changed to facilitate various working operations.

[0039] The bottom end of the rotating frame 1 is fixedly connected with a rotating rod 13, the outside of the rotating rod 13 is fixedly connected with a rotating bearing 14, and the rotating bearing 14 is fixedly connected with the limiting block 12.

[0040] In work, through rotating the rod 13, the external driving mechanism such as a servo motor set is connected, so that the rotating frame 1 can be driven to rotate, and the rotating bearing 14 is designed to make the limiting block 12 not rotate in the process of driving the rotating frame 1 to rotate. It should be noted that, in actual use, if the limiting block 12 is of light quality, the limiting block 12 can be connected with the ground through a connecting rod to improve the stability of the limiting block 12.

[0041] The four extrusion plates 15 are uniformly and fixedly connected outside the cover plate 1201, the hollow block 17 is fixedly connected with the hollow capsule 16 on one side close to the extrusion plate 15, the hollow block 17 is rotatably connected with the telescopic plate 18 at the top end, the telescopic plate 18 is fixedly connected with the nozzle 19 at the bottom surface, and the nozzle 19 is in communication with the hollow capsule 16.

[0042] In work, in the process of rotating the hollow block 17 with the rotating frame 1, the hollow capsule 16 is driven to rotate. It should be noted that, in the initial state, the distance from one end of the hollow capsule 16 close to the limiting block 12 to the center position of the rotating frame 1 is less than the distance from one end of the extrusion plate 15 away from the limiting block 12 to the center position of the rotating frame 1. Therefore, in the process of rotating the hollow capsule 16 with the hollow block 17, the hollow capsule 16 will be in contact with the extrusion plate 15, so that the extrusion plate 15 will extrude the hollow capsule 16. After the hollow capsule 16 is extruded, the gas in the hollow capsule 16 will be sprayed out through the nozzle 19. By adjusting the position of the nozzle 19 to face the surface of the fixed mold 2, the airflow can clean the residual casting sand on the surface of the fixed mold 2, facilitating the next core making.

[0043] The elastic membrane 20 is fixedly connected inside the hollow block 17, the flow guide pipe 22 is throughly connected between the hollow capsule 16 and the hollow block 17, the air inlet pipe 23 is fixedly connected at the top end of the hollow capsule 16, the one-way valve is mounted inside the flow guide pipe 22 and the air inlet pipe 23, the air outlet pipe 21 is fixedly connected at the top end of the elastic membrane 20, and the diameter of the air outlet pipe 21 is less than that of the flow guide pipe 22.

[0044] In work, when the extrusion plate 15 extrudes the hollow capsule 16, the gas in the hollow capsule 16 will be injected into the elastic membrane 20 through the flow guide pipe 22, and then be injected into the air outlet pipe 21 through the elastic membrane 20. Subsequently, the gas is injected into the nozzle 19 through the air outlet pipe 21 and sprayed out. Since the diameter of the air outlet pipe 21 is less than that of the flow guide pipe 22, the injection speed of the gas is greater than the discharge speed of the gas, so that the elastic membrane 20 expands and the internal pressure increases, thereby achieving the effect of pressurizing the gas. It should be noted that, after the extrusion plate 15 is separated from the hollow capsule 16, the hollow capsule 16 is reset by sucking external air through the air inlet pipe 23.

[0045] The elastic film 20 is fixed with a plurality of elastic retaining ropes 24 on the bottom surface, and the elastic retaining ropes 24 are fixed with counterweight balls 25 at the ends away from the elastic film 20.

[0046] In operation, the elastic film 20 deforms, which drives the elastic retaining ropes 24 to swing, and the elastic retaining ropes 24 drive the counterweight balls 25 to knock the inner wall of the hollow block 17, thereby generating vibration. In the demolding operation, the vibration makes the core better separated from the fixed mold 2, and in the core making operation, the vibration also makes the core more compact. It should be noted that the gas injection speed in the hollow block 17 is greater than the gas discharge speed, so after the extrusion plate 15 is separated from the hollow block 16, the gas in the elastic film 20 continues to be discharged, so that the swing of the counterweight ball 25 can continue for a period of time. By adjusting the gas injection speed in the hollow block 17 to be equal to the gas discharge speed, the counterweight ball 25 still swings in the core making and demolding process, which achieves the above effect.

[0047] The mounting block 9 is internally provided with a rotary groove, and the two ends of the rotary groove are fixedly connected with connecting pipes 26.

[0048] In operation, it should be noted that in actual use, the connecting pipes 26 can be connected with an external circulating water pump, so that external water can be reciprocally injected into the mounting block 9, accelerating the cooling of the mounting block 9, and further accelerating the cooling of the product in the fixed mold 2, thereby improving the production efficiency.

[0049] The lower portion of the rotating frame 1 is provided with an annular material receiving plate 27, which is concave.

[0050] In operation, by designing the annular material receiving plate 27, when the fixed mold 2 is turned over, the excess casting sand on the surface of the fixed mold 2 will fall into the annular material receiving plate 27, so that the excess casting sand can be collected, saving resources and reducing the subsequent manual cleaning time.

[0051] Working principle: when manufacturing the engine cylinder head sand core by using the embodiment of the application, first, the raw material is fed into the sand shooter 5, then the pusher 4 is started to push the movable mold 3 to move towards the fixed mold 2 until the fixed mold 2 and the movable mold 3 are mutually attached to form a complete mold, then the lifting piece 6 is started to operate to drive the sand shooter 5 to descend and be attached to the mold formed by the fixed mold 2 and the movable mold 3, then the sand shooter 5 is started to inject the raw material into the mold to form a sand core, thereby completing the core making operation, after one operation is completed, the lifting piece 6 drives the sand shooter 5 to ascend, then the pusher 4 drives the movable mold 3 to separate from the fixed mold 2 until the rotating frame 1 rotates by 45 degrees to send the next fixed mold 2 to the processing position, the fixed mold 2 transported to the processing position repeats the above working process, and the fixed mold 2 removed from the processing position is adjusted from the vertical state to the horizontal state to facilitate the demolding operation, by designing eight fixed molds 2 corresponding to four movable molds 3, the fixed mold 2 can be switched after each processing only by rotating by 45 degrees, so that the core making operation can still be performed during the demolding operation of the fixed mold 2, thereby improving the production efficiency; it should be noted that the pusher 4 and the lifting piece 6 are both prior art, which can be a mode that a servo motor drives a screw to drive a sliding block to move, or a mode that a hydraulic cylinder cooperates with a hydraulic rod to move, as long as it can move linearly back and forth;

[0052] In specific use, first, the push-pull mechanism is operated to drive the mounting block 9 to move, the movement of the mounting block 9 drives the fixed mold 2 to rotate around the support rod 8, when the fixed mold 2 is connected with the movable mold 3, the push-pull mechanism is in the state of pushing out and pushing the fixed mold 2 to keep vertical, and when the rotating frame 1 rotates by 45 degrees, the push-pull mechanism connected with the fixed mold 2 is in the state of pulling back and pulling the fixed mold 2 to keep horizontal;

[0053] In specific use, the rotating frame 1 rotates to drive the hollow block 17 to rotate, the hollow block 17 drives the support rod 8 to rotate, the support rod 8 drives the mounting block 9 to move, the mounting block 9 drives the connecting rod 10 and the limiting ball 11 to move, since the limiting ball 11 is slidingly connected in the limiting block 12, the limiting ball 11 slides along the shape of the limiting block 12 in the process of being driven by the mounting block 9 to rotate, and the connecting rod 10 is connected with the limiting ball 11, so that the connecting rod 10 also slides along the shape of the limiting block 12 in the process of being driven by the mounting block 9 to rotate Figure 3 -Appendix Figure 6 It can be known that, in the process of rotating the limiting ball 11, the limiting ball 11 moves back and forth along the surface of the limiting block 12, that is, the fixed mold 2 is pushed and pulled back and forth, thereby achieving the effect of automatically adjusting the posture of the fixed mold 2 to facilitate core making and demolding;

[0054] It should be noted that, when the fixed mold 2 is adjusted from the vertical state to the horizontal state, the rotating connection position of the mounting block 9 and the connecting rod 10 also changes constantly, for this reason, the limiting groove 1203 is designed, referring to the attached drawings Figure 6It can be seen that the limiting groove 1203 is wavy and is arranged on the surface of the slider 1202. When the fixed mold 2 is in the vertical state, the limiting ball 11 is located at the bottom of the limiting groove 1203. When the fixed mold 2 is in the horizontal state, the limiting ball 11 is located at the top of the limiting groove 1203. Such a design can effectively improve the stability of the equipment, thereby achieving the effect of automatically changing the posture of the fixed mold 2 for facilitating various working operations.

[0055] The rotating rod 13 is connected with an external driving mechanism, such as a servo motor set, so as to drive the rotating frame 1 to rotate. The rotating bearing 14 is designed to prevent the limiting block 12 from rotating when the rotating rod 13 drives the rotating frame 1 to rotate. It should be noted that, in actual use, if the limiting block 12 has a light weight, the limiting block 12 can be connected with the ground through a connecting rod to improve the stability of the limiting block 12.

[0056] When the hollow block 17 rotates with the rotating frame 1, the hollow capsule 16 is driven to rotate. It should be noted that, in the initial state, the distance from the hollow capsule 16 close to the limiting block 12 to the center of the rotating frame 1 is less than the distance from the extrusion plate 15 away from the limiting block 12 to the center of the rotating frame 1. Therefore, when the hollow capsule 16 rotates with the hollow block 17, the hollow capsule 16 is in contact with the extrusion plate 15, so that the extrusion plate 15 extrudes the hollow capsule 16. After the hollow capsule 16 is extruded, the gas in the hollow capsule 16 is sprayed out through the nozzle 19. By adjusting the position of the nozzle 19, the nozzle 19 is directed to the surface of the fixed mold 2, so that the gas flow cleans the residual casting sand on the surface of the fixed mold 2, facilitating the next core making.

[0057] When the extrusion plate 15 extrudes the hollow capsule 16, the gas in the hollow capsule 16 is injected into the elastic membrane 20 through the flow guide pipe 22, and then is injected into the exhaust pipe 21 through the elastic membrane 20. Subsequently, the gas is injected into the nozzle 19 through the exhaust pipe 21 and is sprayed out. Since the diameter of the exhaust pipe 21 is less than the diameter of the flow guide pipe 22, the injection speed of the gas is greater than the discharge speed of the gas, so that the elastic membrane 20 expands and the internal pressure increases, thereby achieving the effect of pressurizing the gas. It should be noted that, after the extrusion plate 15 is separated from the hollow capsule 16, the hollow capsule 16 is reset by sucking external air through the air inlet pipe 23.

[0058] In the process of the elastic film 20 deformation, it will drive the elastic tether 24 swing, the elastic tether 24 swing will drive the counterweight ball 25 knock the inner wall of the hollow block 17, thereby generating vibration, in the demolding operation, the vibration will make the core better and the fixed mold 2 separation, and in the core making operation, the vibration can also make the core more solid; It needs to be explained that, due to the injection speed of the gas in the hollow block 17 is greater than the exhaust speed of the gas, so after the separation of the extrusion plate 15 and the hollow block 16, the gas in the elastic film 20 will continue to exhaust, so that the swing of the counterweight ball 25 can continue for a period of time, by adjusting the injection speed of the gas in the hollow block 17 and the exhaust speed of the gas, so that the counterweight ball 25 still swings in the process of core making and demolding, the above-mentioned effect can be achieved;

[0059] It needs to be explained that, in actual use, the connecting pipe 26 can be connected to the external circulating water pump, so that the external water can be reciprocatingly injected into the mounting block 9, accelerating the cooling of the mounting block 9, and then accelerating the cooling of the product in the fixed mold 2, improving the production efficiency;

[0060] By designing the annular receiving plate 27, when the fixed mold 2 is turned over, the excess casting sand on the surface will fall into the annular receiving plate 27, so that the excess casting sand can be collected, saving resources and reducing the subsequent manual cleaning time.

[0061] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An engine cylinder head core casting apparatus characterized by: The utility model provides a sand casting machine, including rotatable rotating frame (1), eight fixed moulds (2) are rotatably installed inside the rotating frame (1) through push mechanism, the push mechanism is used to push fixed mould (2) and switch between horizontal and vertical state, four movable moulds (3) are arranged outside the rotating frame (1), pusher (4) is installed on the side away from fixed mould (2) of movable mould (3), shooting machine (5) is arranged above movable mould (3), lifting piece (6) is fixedly connected on the top surface of shooting machine (5), L type support plate (7) is fixedly connected outside pusher (4) and lifting piece (6) all. The push mechanism includes eight hollow blocks (17) fixed in the rotating frame (1), support rods (8) are fixed between every two of the eight hollow blocks (17), mounting blocks (9) are rotatably connected outside the support rods (8), push-pull mechanisms are installed at the bottom of the mounting blocks (9), the push-pull mechanisms are used to reciprocatingly push and pull the mounting blocks (9), and the mounting blocks (9) are fixedly connected with the fixed moulds (2).

2. The engine cylinder head core making apparatus of claim 1 wherein: The push-pull mechanisms include connecting rods (10) rotatably connected at the bottom of the mounting blocks (9), limit balls (11) are rotatably connected on the side away from the mounting blocks (9) of the connecting rods (10), limit blocks (12) are slidably connected outside the limit balls (11), four inner grooves are uniformly formed in the outer part of the limit blocks (12), and the four inner grooves are staggered with the four movable moulds (3).

3. The engine cylinder head core making apparatus of claim 2 wherein: The limit blocks (12) include a pair of cover plates (1201) and sliding blocks (1202) fixed in the pair of cover plates (1201), limit grooves (1203) are formed in the sliding blocks (1202), the limit grooves (1203) are protruding at the positions corresponding to the inner grooves, the limit grooves (1203) are recessed at the positions not corresponding to the inner grooves, and the limit balls (11) are slidably connected in the limit grooves (1203).

4. The engine cylinder head core making apparatus of claim 3 wherein: Rotating rods (13) are fixed at the bottom of the rotating frame (1), rotating bearings (14) are fixed outside the rotating rods (13), and the rotating bearings (14) are fixedly connected with the limit blocks (12).

5. The engine cylinder head core casting apparatus of claim 4, wherein: Four extrusion plates (15) are uniformly fixed outside the cover plates (1201), hollow capsules (16) are fixed on the side close to the extrusion plates (15) of the hollow blocks (17), telescopic plates (18) are rotatably connected at the top of the hollow blocks (17), nozzles (19) are fixed at the bottom of the telescopic plates (18), and the nozzles (19) are communicated with the hollow capsules (16).

6. The engine cylinder head core casting apparatus of claim 5, wherein: Elastic membranes (20) are fixed in the hollow blocks (17), flow guide pipes (22) are connected through the hollow capsules (16) and the hollow blocks (17), air inlet pipes (23) are fixed at the top of the hollow capsules (16), one-way valves are installed in the flow guide pipes (22) and the air inlet pipes (23), and exhaust pipes (21) are fixed at the top of the elastic membranes (20), and the diameter of the exhaust pipes (21) is smaller than the diameter of the flow guide pipes (22).

7. The engine cylinder head core casting apparatus of claim 6, wherein: The elastic film (20) is fixed with a plurality of elastic tethering ropes (24) on the bottom surface, and the elastic tethering rope (24) is fixed with a counterweight ball (25) at the end far from the elastic film (20).

8. The engine cylinder head core casting apparatus of claim 7, wherein: The mounting block (9) is internally provided with a rotary groove, and the two ends of the rotary groove are fixedly connected with connecting pipes (26).

9. The engine cylinder head core casting apparatus of claim 8, wherein: The lower portion of the rotating frame (1) is provided with an annular material receiving plate (27), and the annular material receiving plate (27) is concave.

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