Casting and core-making device for engine cylinder cover

Abstract

The invention belongs to the technical field of core casting, and particularly relates to an engine cylinder cover core casting device which comprises a rotatable rotating frame, eight fixed molds are rotatably mounted in the rotating frame through a pushing mechanism, and the pushing mechanism is used for pushing the fixed molds to be switched between the horizontal state and the vertical state. Four movable molds are arranged outside the rotating frame, pushing pieces are installed on the sides, away from the fixed mold, of the movable molds, a sand shooting machine is arranged above the movable molds, lifting pieces are fixedly connected to the top face of the sand shooting machine, and L-shaped supporting plates are fixedly connected to the outer portions of the pushing pieces and the outer portions of the lifting pieces; and the eight fixed molds correspond to the four movable molds, so that the switching work of the fixed molds can be completed only by rotating for 45 degrees after each time of processing, the core manufacturing work can still be performed during the demolding operation of the fixed molds, and the production and manufacturing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of casting core making, in particular to a casting core making device for an engine cylinder head. Background Art

[0002] The core making machine, also known as the core shooting machine, is a special equipment used in the foundry industry to make sand cores. Its principle is to use compressed air to spray core sand into the inner cavity of the mold through a special sand hopper, so that the core sand is heated and quickly solidified into shape. It is divided into hot core box and cold core box, suitable for the production of complex molds and can produce high-precision sand cores.

[0003] The automobile engine is the core component of the automobile, and it requires extremely high precision in production and processing. Therefore, when casting the engine cylinder head, 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 processes of core making machines in the existing technology are mostly the same. First, the movable mold is moved and connected with the fixed mold, and then the sand shooting mechanism is lowered and connected with the sand shooting holes reserved on the mold to perform the core making operation. After the core making is completed, the sand shooting mechanism first moves up, and then the movable mold is separated from the fixed mold, and then the fixed mold is demolded, thus completing a core making operation; 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 generate useful work at this time, which does not meet the requirements of lean production and has low production efficiency.

[0005] To this end, the present invention provides a core-making device for casting a cylinder head of an engine. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the engine cylinder head casting core making device described in the present invention includes a rotatable rotating frame, eight fixed molds are rotatably installed inside the rotating frame through a pushing mechanism, and the pushing mechanism is used to push the fixed mold to switch between horizontal and vertical states. Four movable molds are arranged on the outside of the rotating frame, and a pushing member is installed on the side of the movable mold away from the fixed mold. A sand shooting machine is arranged above the movable mold, and a lifting member is fixedly connected to the top surface of the sand shooting machine. The outside of the pushing member and the lifting member are both fixedly connected to an L-shaped support plate.

[0008] Preferably, the pushing mechanism includes eight hollow blocks fixed to the inside of the rotating frame, and support rods are fixed between each of the eight hollow blocks. The support rods are rotatably connected to the outside of the mounting blocks, and a push-pull mechanism is installed at the bottom end of the mounting blocks. The push-pull mechanism is used to push and pull the mounting blocks reciprocatingly, and the mounting blocks are fixedly connected to the fixed mold.

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

[0010] Preferably, the limit block includes a pair of cover plates and a slider fixed to the inside of the pair of cover plates, a limit groove is opened inside the slider, the limit groove is convex at the position corresponding to the inner groove, and the limit groove is concave at the position corresponding to the non-inner groove, and the limit ball is slidably connected to the inside of the limit groove.

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

[0012] Preferably, four extrusion plates are evenly fixed to the outside of the cover plate, a hollow capsule is fixed to one side of the hollow block close to the extrusion plate, a telescopic plate is rotatably connected to the top of the hollow block, a nozzle is fixed to the bottom of the telescopic plate, and the nozzle is connected to the hollow capsule.

[0013] Preferably, an elastic membrane is fixedly connected to the inside of the hollow block, a guide tube is connected between the hollow bag and the hollow block, an air intake pipe is fixedly connected to the top of the hollow bag, a one-way valve is installed inside the guide tube and the air intake pipe, an exhaust pipe is fixedly connected to the top of the elastic membrane, and the diameter of the exhaust pipe is smaller than the diameter of the guide tube.

[0014] Preferably, a plurality of elastic mooring ropes are fixedly connected to the bottom surface of the elastic membrane, and a weighted ball is fixedly connected to one end of the elastic mooring rope away from the elastic membrane.

[0015] Preferably, a rotary groove is provided inside the mounting block, and connecting pipes are fixedly connected to both ends of the rotary groove.

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

[0017] The beneficial effects of the present invention are as follows: 1. The engine cylinder head casting core-making device described in the present invention is designed with eight fixed molds and four movable molds corresponding to each other, so that the fixed mold can be switched by rotating it 45 degrees after each processing. In this way, the core-making work can still be carried out during the demolding operation of the fixed mold, thereby improving the efficiency of production and manufacturing.

[0018] 2. The engine cylinder head casting core-making device described in the present invention has a wavy limit groove on the surface of the slider. When the fixed mold is in a vertical state, the limit ball is located at the bottom of the limit groove. When the fixed mold is in a horizontal state, the limit ball is located at the top of the limit groove. Such a design can effectively improve the stability of the equipment operation, thereby achieving the effect of automatically changing the posture of the fixed mold to facilitate various processing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of the present invention; Figure 2 It is a bottom view of the present invention; Figure 3 It is a structural schematic diagram of the L-shaped support plate in the present invention; Figure 4 It is a structural schematic diagram of the hollow block in the present invention; Figure 5 It is a structural schematic diagram of the extruded plate in the present invention; Figure 6 It is a structural schematic diagram of the limiting groove in the present invention; Figure 7 It is a structural cross-sectional view of the hollow block of the present invention; Figure 8 It is a structural schematic diagram of the limiting ball in the present invention.

[0021] In the figure: 1. Rotating frame; 2. Fixed mold; 3. Moving mold; 4. Pusher; 5. Sand shooting machine; 6. Lifting member; 7. L-shaped support plate; 8. Support rod; 9. Mounting block; 10. Connecting rod; 11. Limiting ball; 12. Limiting block; 1201. Cover plate; 1202. Slider; 1203. Limiting groove; 13. Rotating rod; 14. Rotating bearing; 15. Extrusion plate; 16. Hollow bag; 17. Hollow block; 18. Telescopic plate; 19. Nozzle; 20. Elastic membrane; 21. Exhaust pipe; 22. Guide pipe; 23. Inlet pipe; 24. Elastic mooring rope; 25. Counterweight ball; 26. Connecting pipe; 27. Annular receiving plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 8As shown, an engine cylinder head casting core-making device according to an embodiment of the present invention comprises a rotatable rotating frame 1, eight fixed molds 2 are rotatably mounted inside the rotating frame 1 via a pushing mechanism, the pushing mechanism being used to push the fixed molds 2 to switch between a horizontal state and a vertical state, four movable molds 3 are arranged outside the rotating frame 1, a pushing member 4 is mounted on a 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 member 6 is fixedly connected to the top surface of the sand-shooting machine 5, and an L-shaped support plate 7 is fixedly connected to the outside of both the pushing member 4 and the lifting member 6; During operation, when using the embodiment of the present invention to manufacture the sand core of the engine cylinder head, the raw material is first introduced into the sand shooting machine 5, and then the pushing member 4 is started to push the movable mold 3 toward the fixed mold 2 until the fixed mold 2 and the movable mold 3 are fitted together to form a complete mold, and then the lifting member 6 is started. The lifting member 6 runs to drive the sand shooting machine 5 to descend and fit with 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 material into the mold to form a sand core, thereby completing the core making operation. After one operation is completed, the lifting member 6 drives the sand shooting machine 5 to rise, and then the pushing member 4 drives the movable mold 3 to separate from the fixed mold 2 until the rotating frame 1 rotates 45 degrees, thereby sending the next fixed mold 2 To the processing position, the fixed mold 2 transported to the processing position repeats the above work process, and the fixed mold 2 moved away from the processing position will be adjusted from a vertical state to a horizontal state by the pushing mechanism, so as to facilitate the demoulding operation. By designing eight fixed molds 2 and four movable molds 3 to correspond to each other, it is only necessary to rotate 45 degrees after each processing to complete the switching of the fixed mold 2. In this way, during the demoulding operation of the fixed mold 2, the core making work can still be carried out, which improves the efficiency of production and manufacturing; it should be noted that the pushing member 4 and the lifting member 6 are both existing technologies. It can be a servo motor driving a screw to drive the slider to operate, or it can be a motion component of a hydraulic cylinder and a hydraulic rod, which only needs to meet the reciprocating linear motion.

[0024] The pushing mechanism includes eight hollow blocks 17 fixed to the inside of the rotating frame 1, and a support rod 8 is fixed between each of the eight hollow blocks 17. The support rod 8 is rotatably connected to the outside of the mounting block 9. The bottom end of the mounting block 9 is equipped with a push-pull mechanism, which is used to push and pull the mounting block 9 back and forth. The mounting block 9 is fixedly connected to the fixed mold 2; During operation, in specific use, the push-pull mechanism is first operated, thereby driving the installation block 9 to move. The movement of the installation block 9 will pull the fixed mold 2 to rotate around the support rod 8. When the fixed mold 2 is docked with the movable mold 3, the push-pull mechanism is in the pushing state and pushes the fixed mold 2 to remain vertical. When the rotating frame 1 rotates 45 degrees, the push-pull mechanism connected to the above-mentioned fixed mold 2 is in the pulling state and pulls the fixed mold 2 to remain horizontal.

[0025] The push-pull mechanism includes a connecting rod 10 rotatably connected to the bottom of the mounting block 9, and the connecting rod 10 is rotatably connected to a limiting ball 11 on the side away from the mounting block 9. The limiting ball 11 is externally slidably engaged with a limiting block 12. The limiting block 12 is evenly provided with four inner grooves on the outside, and the four inner grooves are staggered with the four movable molds 3. During operation, in specific use, the rotating frame 1 rotates to drive the hollow block 17 to rotate, the rotation of the hollow block 17 drives the support rod 8 to rotate, the rotation of the support rod 8 drives the installation block 9 to move, and the installation block 9 at this time will drive 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 process of the limiting ball 11 driven by the installation block 9 to rotate. Figure 3 -Attached Figure 6 It can be seen that during the rotation of the limiting ball 11, it will perform reciprocating telescopic motion along the surface of the limiting block 12, that is, reciprocating pushing and pulling the fixed mold 2, thereby achieving the effect of automatically adjusting the posture of the fixed mold 2 to facilitate core making and demoulding.

[0026] The limiting block 12 includes a pair of cover plates 1201 and a slider 1202 fixed to the inside of the pair of cover plates 1201. A limiting groove 1203 is defined inside the slider 1202. The limiting groove 1203 is convex at a position corresponding to the inner groove and concave at a position corresponding to the non-inner groove. The limiting ball 11 is slidably connected to the inside of the limiting groove 1203. During operation, it should be noted that when the fixed mold 2 is adjusted from the vertical state to the horizontal state, the rotation connection position of the mounting block 9 and the connecting rod 10 is also constantly changing. For this purpose, a limit groove 1203 is designed. Figure 6 It can be seen that the limit groove 1203 is opened in a wave shape on the surface of the slider 1202. When the fixed mold 2 is in a vertical state, the limit ball 11 is located at the bottom of the limit groove 1203. When the fixed mold 2 is in a horizontal state, the limit ball 11 is located at the top of the limit groove 1203. Such a design can effectively improve the stability of the equipment operation, thereby achieving the effect of automatically changing the posture of the fixed mold 2 to facilitate various processing operations.

[0027] The bottom end of the rotating frame 1 is fixedly connected to a rotating rod 13, the outside of the rotating rod 13 is fixedly connected to a rotating bearing 14, and the rotating bearing 14 is fixedly connected to the limit block 12; During operation, the rotating rod 13 is connected to an external driving mechanism, such as a servo motor group, so as to drive the rotating frame 1 to rotate, and the rotating bearing 14 is designed to ensure that when the rotating rod 13 drives the rotating frame 1 to rotate, the limit block 12 will not rotate accordingly. It should be noted that in actual use, if the material of the limit block 12 is relatively light, the limit block 12 can be connected to the ground through a connecting rod to improve the stability of the limit block 12.

[0028] Four extrusion plates 15 are evenly fixed to the outside of the cover plate 1201. A hollow capsule 16 is fixed to one side of the hollow block 17 close to the extrusion plate 15. A telescopic plate 18 is rotatably connected to the top of the hollow block 17. A nozzle 19 is fixed to the bottom of the telescopic plate 18. The nozzle 19 is connected to the hollow capsule 16. During operation, as the hollow block 17 rotates with the rotating frame 1, it will simultaneously drive the hollow capsule 16 to rotate. It should be noted that, in the initial state, the distance from the end of the hollow capsule 16 close to the limit block 12 to the center position of the rotating frame 1 is smaller than the distance from the end of the extrusion plate 15 away from the limit block 12 to the center position of the rotating frame 1. Therefore, as the hollow capsule 16 rotates with the hollow block 17, it will contact the extrusion plate 15, so that the extrusion plate 15 will squeeze the hollow capsule 16. After the hollow capsule 16 is pressurized, the gas inside it will be ejected through the nozzle 19. By adjusting the position of the nozzle 19 so that it is facing the surface of the fixed mold 2, the airflow can clean the casting sand remaining on the surface of the fixed mold 2, thereby facilitating the next core making.

[0029] An elastic membrane 20 is fixedly connected to the interior of the hollow block 17. A guide tube 22 is connected between the hollow bladder 16 and the hollow block 17. An air intake pipe 23 is fixedly connected to the top of the hollow bladder 16. Both the guide tube 22 and the air intake pipe 23 are equipped with a one-way valve. An exhaust pipe 21 is fixedly connected to the top of the elastic membrane 20. The diameter of the exhaust pipe 21 is smaller than that of the guide tube 22. During operation, when the extrusion plate 15 squeezes the hollow bag 16, the gas inside the hollow bag 16 will be injected into the elastic membrane 20 through the guide tube 22, and then injected into the exhaust pipe 21 through the elastic membrane 20, and then injected into the nozzle 19 through the exhaust pipe 21 and ejected. Since the diameter of the exhaust pipe 21 is smaller than the diameter of the guide tube 22, the gas injection speed is greater than the gas discharge speed, so that the elastic membrane 20 expands and the pressure inside it increases, thereby achieving the effect of pressurizing the gas; it should be noted that after the extrusion plate 15 is separated from the hollow bag 16, the hollow bag 16 sucks in external air through the air inlet pipe 23 to reset.

[0030] A plurality of elastic tethering ropes 24 are fixedly connected to the bottom surface of the elastic membrane 20, and a weighted ball 25 is fixedly connected to one end of the elastic tethering rope 24 away from the elastic membrane 20; During operation, as the elastic membrane 20 deforms, it will simultaneously drive the elastic mooring rope 24 to swing, and the swing of the elastic mooring rope 24 will drive the counterweight ball 25 to knock on the inner wall of the hollow block 17, thereby generating vibration. During the demolding operation, the vibration will make the produced core better separated from the fixed mold 2, and during the core making operation, the vibration can also make the produced core more compact. At the same time, it should be noted that since the injection speed of the gas in the hollow block 17 is greater than the discharge speed of the gas, after the extrusion plate 15 is separated from the hollow bag 16, the gas inside the elastic membrane 20 will also continue to be discharged, thereby allowing the counterweight ball 25 to swing for a period of time. By adjusting the injection speed of the gas in the hollow block 17 to the discharge speed of the gas, the counterweight ball 25 can continue to swing during the core making and demolding process, and the above effect can be achieved.

[0031] A rotary groove is provided inside the mounting block 9, and connecting pipes 26 are fixedly connected to both ends of the rotary groove; During operation, it should be noted that in actual use, the connecting pipe 26 can be connected to an external circulating water pump so that external water can be injected back and forth into the mounting block 9 to accelerate the cooling of the mounting block 9, thereby accelerating the cooling of the product inside the fixed mold 2 and improving production efficiency.

[0032] An annular receiving plate 27 is provided below the rotating frame 1, and the annular receiving plate 27 is concave; During operation, by designing the annular receiving plate 27, when the fixed mold 2 is flipped, the excess casting sand on its surface will fall into the annular receiving plate 27, so that the excess casting sand can be collected in a centralized manner, saving resources while also reducing the subsequent manual cleaning work time.

[0033] Working principle: When using the embodiment of the present invention to manufacture the sand core of the engine cylinder head, first, the raw material is introduced into the sand shooting machine 5, and then the pushing member 4 is started to push the movable mold 3 toward the fixed mold 2 until the fixed mold 2 and the movable mold 3 are fitted together to form a complete mold, and then the lifting member 6 is started. The lifting member 6 runs to drive the sand shooting machine 5 to descend and fit with 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 material into the mold to form a sand core, thereby completing the core making operation. After one operation is completed, the lifting member 6 drives the sand shooting machine 5 to rise, and then the pushing member 4 drives the movable mold 3 to separate from the fixed mold 2, until the rotating frame 1 rotates 45 degrees, thereby sending the next fixed mold 2 The fixed mold 2 transported to the processing position repeats the above-mentioned work process, and the fixed mold 2 moved away from the processing position will be adjusted from a vertical state to a horizontal state by the pushing mechanism, so as to facilitate the demoulding operation. By designing eight fixed molds 2 and four movable molds 3 to correspond to each other, it is only necessary to rotate 45 degrees after each processing to complete the switching of the fixed mold 2. In this way, the core making work can still be carried out during the demoulding operation of the fixed mold 2, thereby improving the efficiency of production and manufacturing. It should be noted that the pushing member 4 and the lifting member 6 are both existing technologies. They can be a servo motor driving a screw to drive a slider to operate, or a hydraulic cylinder and a hydraulic rod motion assembly, which only needs to meet the reciprocating linear motion. During specific use, the push-pull mechanism is first operated, thereby driving the installation block 9 to move. The movement of the installation block 9 will pull the fixed mold 2 to rotate around the support rod 8. When the fixed mold 2 is docked with the movable mold 3, the push-pull mechanism is in the pushing state and pushes the fixed mold 2 to remain vertical. When the rotating frame 1 rotates 45 degrees, the push-pull mechanism connected to the above-mentioned fixed mold 2 is in the pulling state and pulls the fixed mold 2 to remain horizontal. During specific use, the rotating frame 1 rotates to drive the hollow block 17 to rotate, the rotation of the hollow block 17 drives the support rod 8 to rotate, the rotation of the support rod 8 drives the installation block 9 to move, and the installation block 9 at this time drives the connecting rod 10 and the limiting ball 11 to move. Since the limiting ball 11 slides and is 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 process of the limiting ball 11 driven by the installation block 9 to rotate. Figure 3 -Attached Figure 6 It can be seen that during the rotation of the limiting ball 11, it will perform reciprocating telescopic motion along the surface of the limiting block 12, that is, reciprocating pushing and pulling the fixed mold 2, thereby achieving the effect of automatically adjusting the posture of the fixed mold 2 to facilitate core making and demoulding; It should be noted that when the fixed mold 2 is adjusted from the vertical state to the horizontal state, the rotation connection position of the mounting block 9 and the connecting rod 10 is also constantly changing. For this purpose, a limiting groove 1203 is designed. Figure 6It can be seen that the limiting groove 1203 is wavy and is opened on the surface of the slider 1202. When the fixed mold 2 is in a vertical state, the limiting ball 11 is exactly located at the bottom end of the limiting groove 1203. When the fixed mold 2 is in a horizontal state, the limiting ball 11 is exactly located at the top end of the limiting groove 1203. Such a design can effectively improve the stability of the equipment operation, thereby achieving the effect of automatically changing the posture of the fixed mold 2 to facilitate various processing operations. The rotating frame 1 is driven to rotate by connecting an external driving mechanism, such as a servo motor, through the rotating rod 13. The design of the rotating bearing 14 is to ensure that the limit block 12 does not rotate when the rotating rod 13 drives the rotating frame 1 to rotate. It should be noted that in actual use, if the material of the limit block 12 is relatively light, the limit block 12 can be connected to the ground through a connecting rod to improve the stability of the limit block 12. As the hollow block 17 rotates with the rotating frame 1, it will simultaneously drive the hollow capsule 16 to rotate. It should be noted that, in the initial state, the distance from the end of the hollow capsule 16 close to the limit block 12 to the center of the rotating frame 1 is smaller than the distance from the end of the extrusion plate 15 away from the limit block 12 to the center of the rotating frame 1. Therefore, as the hollow capsule 16 rotates with the hollow block 17, it will contact the extrusion plate 15, so that the extrusion plate 15 will squeeze the hollow capsule 16. After the hollow capsule 16 is pressurized, the gas inside it will be ejected through the nozzle 19. By adjusting the position of the nozzle 19 so that it is facing the surface of the fixed mold 2, the air flow will clean the casting sand remaining on the surface of the fixed mold 2, thereby facilitating the next core making. When the extrusion plate 15 squeezes the hollow bladder 16, the gas inside the hollow bladder 16 is injected into the elastic membrane 20 through the guide tube 22, and then injected into the exhaust pipe 21 through the elastic membrane 20, and then injected into the nozzle 19 through the exhaust pipe 21 before being ejected. Since the diameter of the exhaust pipe 21 is smaller than the diameter of the guide tube 22, the injection speed of the gas is greater than the discharge speed of the gas, causing the elastic membrane 20 to expand and increase the pressure inside it, thereby achieving the effect of pressurizing the gas. It should be noted that after the extrusion plate 15 is separated from the hollow bladder 16, the hollow bladder 16 is reset by sucking in external air through the intake pipe 23. During the deformation of the elastic membrane 20, it will simultaneously drive the elastic mooring rope 24 to swing, and the swing of the elastic mooring rope 24 will drive the counterweight ball 25 to hit the inner wall of the hollow block 17, thereby generating vibration. During the demolding operation, the vibration will make the core better separated from the fixed mold 2, and during the core making operation, the vibration can also make the core more compact. At the same time, it should be noted that since the injection speed of the gas in the hollow block 17 is greater than the discharge speed of the gas, after the extrusion plate 15 is separated from the hollow capsule 16, the gas inside the elastic membrane 20 will continue to be discharged, thereby allowing the counterweight ball 25 to swing for a period of time. By adjusting the injection speed of the gas in the hollow block 17 to the discharge speed of the gas, the counterweight ball 25 is allowed to swing during the core making and demolding process, and the above-mentioned effect can be achieved. It should be noted that, in actual use, the connecting pipe 26 can be connected to an external circulating water pump so that external water can be injected back and forth into the mounting block 9, thereby accelerating the cooling of the mounting block 9, thereby accelerating the cooling of the product inside the fixed mold 2, and improving production efficiency. By designing the annular receiving plate 27, when the fixed mold 2 is flipped, the excess casting sand on its surface will fall into the annular receiving plate 27, so that the excess casting sand can be collected in a centralized manner, saving resources and reducing the subsequent manual cleaning work time.

[0034] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An engine cylinder head casting core making device, characterized in that: The invention comprises a rotatable rotating frame (1), wherein eight fixed molds (2) are rotatably installed inside the rotating frame (1) through a pushing mechanism, and the pushing mechanism is used to push the fixed molds (2) to switch between a horizontal state and a vertical state. Four movable molds (3) are arranged outside the rotating frame (1), and a pushing member (4) is installed 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), and a lifting member (6) is fixedly connected to the top surface of the sand shooting machine (5). The outsides of the pushing member (4) and the lifting member (6) are both fixedly connected to an L-shaped support plate (7).

2. The engine cylinder head casting core making device according to claim 1, characterized in that: The pushing mechanism comprises eight hollow blocks (17) fixedly connected to the interior of the rotating frame (1), wherein each of the eight hollow blocks (17) is fixedly connected to a support rod (8), wherein the support rod (8) is externally rotatably connected to a mounting block (9), and a push-pull mechanism is installed at the bottom end of the mounting block (9), wherein the push-pull mechanism is used to push and pull the mounting block (9) reciprocatingly, and the mounting block (9) is fixedly connected to the fixed mold (2).

3. The engine cylinder head casting core making device according to claim 2, characterized in that: The push-pull mechanism comprises a connecting rod (10) rotatably connected to the bottom of the mounting block (9); the connecting rod (10) is rotatably connected to a limiting ball (11) on a side away from the mounting block (9); the limiting ball (11) is externally slidably engaged with a limiting block (12); four inner grooves are evenly formed on the outside of the limiting block (12), and the four inner grooves are staggered with the four movable molds (3).

4. The engine cylinder head casting core making device according to claim 3, characterized in that: The limiting block (12) comprises a pair of cover plates (1201), and a slider (1202) fixedly connected to the inside of the pair of cover plates (1201); a limiting groove (1203) is provided inside the slider (1202); the limiting groove (1203) is convex at a position corresponding to the inner groove; the limiting groove (1203) is concave at a position corresponding to the non-inner groove; the limiting ball (11) is slidably connected inside the limiting groove (1203).

5. The engine cylinder head casting core making device according to claim 4, characterized in that: The bottom end of the rotating frame (1) is fixedly connected to a rotating rod (13), the outside of the rotating rod (13) is fixedly connected to a rotating bearing (14), and the rotating bearing (14) is fixedly connected to the limiting block (12).

6. The engine cylinder head casting core making device according to claim 5, characterized in that: Four extrusion plates (15) are evenly fixed to the outside of the cover plate (1201); a hollow capsule (16) is fixed to one side of the hollow block (17) close to the extrusion plate (15); a telescopic plate (18) is rotatably connected to the top of the hollow block (17); a nozzle (19) is fixed to the bottom surface of the telescopic plate (18); and the nozzle (19) is connected to the hollow capsule (16).

7. The engine cylinder head casting core making device according to claim 6, characterized in that: An elastic membrane (20) is fixedly connected to the interior of the hollow block (17); a flow guide tube (22) is connected through the hollow sac (16) and the hollow block (17); an air intake tube (23) is fixedly connected to the top end of the hollow sac (16); both the flow guide tube (22) and the air intake tube (23) are equipped with a one-way valve; an exhaust pipe (21) is fixedly connected to the top end of the elastic membrane (20); and the diameter of the exhaust pipe (21) is smaller than the diameter of the flow guide tube (22).

8. The engine cylinder head casting core making device according to claim 7, characterized in that: A plurality of elastic mooring ropes (24) are fixedly connected to the bottom surface of the elastic membrane (20), and a weighted ball (25) is fixedly connected to one end of the elastic mooring rope (24) away from the elastic membrane (20).

9. The engine cylinder head casting core making device according to claim 8, characterized in that: A rotary groove is provided inside the mounting block (9), and connecting pipes (26) are fixedly connected to both ends of the rotary groove.

10. The engine cylinder head casting core making device according to claim 9, characterized in that: An annular material receiving plate (27) is provided below the rotating frame (1), and the annular material receiving plate (27) is concave.

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