Casting molding core shooter

Abstract

The invention provides a casting molding core shooter, and relates to the technical field of core shooters. The casting molding core shooter comprises a base, a sand blasting box, a compressed air supply device, a negative pressure pump, a filter box, a mold closing driving device, a sliding table, an upper mold plate and six groups of lower mold boxes. According to the core shooter, automation of the whole working process of the core shooter is achieved through cooperation of rotation of the first motor and overturning driving, the mold closing driving device, the material ejecting structure, the discharging structure and the cleaning structure, the production efficiency is greatly improved, before and after the lower mold box is overturned, positioning is achieved through cooperation of positioning pins and positioning holes in the outer wall of the lower mold box, and the production efficiency is greatly improved. The lower mold box is kept still during mold closing and core shooting, material ejecting and cleaning, the running precision of equipment is improved, the cleaning station is arranged behind the discharging station, redundant sand in a mold closing surface and a cavity is cleaned up in the mode that compressed air is blown and then a negative pressure pump is used for sucking dust, the mold closing precision is improved, and the mold closing efficiency is improved. And meanwhile, pollution to the surrounding environment in the cleaning process is also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of core shooters, and specifically to a core shooter for casting molding. Background Art

[0002] In the prior art, when producing sand castings, it is necessary to inject sand into the cavity of the molding box through a core shooter to form a casting mold. The core shooter uses compressed air to evenly inject the molding sand into the sand box for pre-compaction, and then applies pressure for compaction. Traditional core shooters can basically meet people's usage requirements. However, most core shooters on the market can only perform a group of sand casting operations at the same time when in use. Therefore, the working efficiency of the core shooter is slow, and multiple groups of core shooters need to be configured to work, resulting in an increase in labor costs and occupying a large amount of space. For this reason, there is a publicly known technology that proposes a fully automatic disk core shooter, including a base, a motor, an air storage bag, a sand injection pipe, and a turntable. Both ends of the top of the base are provided with support rods, and the top of the support rods is provided with a fixed plate. A feed hopper is installed at the middle position of the fixed plate, and a groove is opened at the top of the side wall of one end inside the feed hopper. The bottom of the feed hopper is provided with a sand injection barrel passing through the fixed plate, and the bottom of the sand injection barrel is provided with a sand injection head. A sand injection hole is opened at the middle position of the bottom inside the sand injection head. The top of the side wall of one end of the support rod is provided with a second support plate, and an air storage bag sleeved on the outer wall of the sand injection barrel is installed at the top of the second support plate. A sand injection pipe is installed at the middle position inside the air storage bag. This publicly known technology states that by providing a rotatable disk, it is convenient for operators to install and disassemble multiple sets of core boxes and perform multiple groups of sand casting operations at the same time. Actually, it can be seen from its description that the electric telescopic rod driving the turntable to lift interferes with the rotation of the turntable when the turntable rotates, resulting in the turntable being unable to rotate. In addition, there is also a publicly known technology that proposes a fully automatic disk core shooter for producing sand cores for casting, including a core shooter mechanism, a mold hydraulic mechanism, a disk machine mechanism, a mechanical part-taking mechanism, and a control mechanism. The core shooter mechanism includes a hopper, a cylinder, and a coated sand injection device provided on the upper part of the core shooter. A sand core mold is provided under the coated sand injection device, and the sand core mold is arranged in the mold hydraulic mechanism. The mold hydraulic mechanism is arranged on the turntable of the disk machine mechanism. A mechanical part-taking mechanism is arranged beside the disk machine, and a sand core output machine is arranged beside the mechanical part-taking mechanism. The control cabinet is arranged on one side of the core shooter. The coated sand injection device of the fully automatic turntable core shooter adopts a structure of one injection for two molds and one supply for eight molds, which fully improves the utilization rate of the core shooter. The part-taking arm is used for part-taking, which improves the safety of operation. The sand core output machine is used to output products, and the product production is automated with low cost. There is no problem of movement interference in the foregoing publicly known technology in this publicly known technology. However, the remaining sand still needs to be poured out after part-taking, and the sand on the mold clamping surface still needs to be manually cleaned. Obviously, the degree of automation of this technology still needs to be improved. The working process of the core shooter includes: mold closing, sand shooting, compaction, shell formation, pouring out the remaining sand, curing, core ejection, core removal, and cleaning. However, the prior art, including this disclosed technology and the aforementioned disclosed technology, has not achieved the automation of all the working processes of sand shooting while solving the problem of improving production efficiency. Therefore, it is necessary to further improve the core shooter for casting molding. Summary of the Invention

[0003] (I) Technical Problem to be Solved In view of the deficiencies of the prior art, the present invention provides a core shooter for casting molding, which solves the problem that the core shooter for casting molding in the prior art fails to achieve the automation of all the working processes of sand shooting while solving the problem of improving production efficiency.

[0004] (II) Technical Solution To achieve the above objectives, the present invention is realized through the following technical solutions: A core shooter for casting molding includes a base, a sand blasting box, a compressed air supply device, a negative pressure pump, a filter box, a mold closing drive device, a sliding table, an upper template, and six lower mold boxes. The upper wall of the base is fixedly connected with an upper cover. A viewing window is provided on the front wall of the upper cover. The upper end of the upper cover is fixedly connected with a cover plate. The sliding table is arranged on the lower wall of the cover plate through the mold closing drive device and is located near the inner rear wall of the upper cover. The upper template is fixedly connected to the lower wall of the sliding table. A sand inlet pipe is fixedly connected to the upper wall of the cover plate near the rear side. A first motor is fixedly connected to the center of the upper wall of the cover plate. The extending shaft of the first motor penetrates through the cover plate and extends into the interior of the upper cover. The end of the extending shaft of the first motor is fixedly connected with a turntable. Six through cavities are arranged on the inner wall of the turntable. The six through cavities are all circumferentially equally distributed with the center of the turntable as the center. The six lower mold boxes are respectively rotatably connected inside the six through cavities. A cavity is arranged on the upper wall of the lower mold box. In the top view projection of the six through cavities, starting from the zero position and rotating counterclockwise in sequence are the core shooting station, the empty position, the sand turning station, the secondary heating station, the unloading station, and the cleaning station. The upper template is vertically opposite to the core shooting station.

[0005] Preferably, the base is composed of a straight partition plate, an arc-shaped plate, and a fixing ring located at the top of the straight partition plate and the arc-shaped plate. The straight partition plate is located on the left side of the arc-shaped plate. A sand recovery structure for recovering sand is arranged on the left side of the straight partition plate. A shielding structure for preventing dust from escaping is arranged on the inner wall of the straight partition plate. An outlet is arranged on the right front wall of the arc-shaped plate. An outlet structure is arranged inside the outlet. The outlet structure is vertically opposite to the unloading station. A cleaning structure for cleaning the cavity is arranged at the right rear wall of the arc-shaped plate. The cleaning structure is vertically opposite to the cleaning station. A flipping drive for driving the lower mold box to flip is arranged between the turntable and the lower mold box. A positioning structure for positioning the lower mold box during core shooting and cleaning is also arranged between the turntable and the lower mold box. A ejecting structure for ejecting the product from the cavity is arranged on the side of the lower mold box away from the cavity. A ejecting drive for driving the ejecting structure to act is arranged at the position on the lower wall of the cover plate vertically opposite to the unloading station.

[0006] Preferably, the recovery structure includes a recovery bucket and a handle. The recovery bucket is arranged on the left side of the straight partition plate and abuts against the straight partition plate. The handle is arranged on the side of the recovery bucket away from the straight partition plate. The recovery bucket is composed of a bucket body and a barrel wall. The barrel wall and the arc-shaped plate of the base are combined into a circle. The height of the bucket body is lower than the lower wall of the lower mold box. The bucket body is vertically opposite to the empty space and the sand casting station.

[0007] Preferably, the shielding structure includes two groups of windows. Both groups of windows are arranged on the inner wall of the straight partition plate and penetrate through the upper end of the straight partition plate. The top views of the two groups of windows are respectively located between the core shooting station and the empty space and between the sand casting station and the secondary heating station. A plurality of groups of elastic rubber plates for covering the windows are arranged on the side wall of the straight partition plate at the positions of the two groups of windows. The elastic rubber plate is fixed at one end in the length direction and gives way through the window when the turntable drives the lower mold box to rotate.

[0008] Preferably, the outlet structure includes a bracket and a conveyor belt. The bracket is arranged inside the outlet. The conveyor belt is arranged on the upper wall of the bracket. One end of the conveyor belt extending into the base is vertically opposite to the unloading station. The end of the conveyor belt away from the inside of the base extends towards the right front of the base.

[0009] Preferably, the cleaning structure includes a support plate, a dust-proof cover, and a lifting cylinder. The support plate is fixedly connected to the inner side wall of the arc-shaped plate and is located below the cleaning station. The dust-proof cover is slidably connected above the support plate through a plurality of second guide rods. The lifting cylinder is fixedly connected to the lower wall of the support plate. The end of the extending shaft of the lifting cylinder penetrates through the inner wall of the support plate and is fixedly connected to the lower wall of the dust-proof cover. A cleaning cavity is provided on the upper wall of the dust-proof cover. The top view projection size of the cleaning cavity is adapted to the top view projection size of the lower die box. A plurality of air blowing pipes are sequentially arranged on the inner lower wall of the dust-proof cover in the front-back direction. A plurality of air blowing holes are provided on the upper walls of the plurality of air blowing pipes. An air inlet joint communicating with the air blowing pipes is provided on the side wall of the dust-proof cover. One end of the air inlet joint away from the dust-proof cover is connected to a compressed air supply device through a pipeline. A dust suction port communicating with the inside of the cleaning cavity is fixedly connected to the lower wall of the dust-proof cover at the central position. A dust suction pipe is fixedly connected to the lower wall of the dust-proof cover and is located below the dust suction port. One end of the dust suction pipe away from the dust-proof cover is connected to a negative pressure pump through a filter box.

[0010] Preferably, the positioning structure includes a fixing plate, a pushing plate, an electric telescopic rod, a positioning pin, and two positioning holes. The fixing plate is fixedly connected to the upper wall of the turntable and is located on one side of the through cavity. The electric telescopic rod is fixedly connected to the side of the fixing plate away from the through cavity. The pushing plate is slidably connected to the side of the fixing plate away from the electric telescopic rod through a first guide rod. The end of the extending shaft of the electric telescopic rod penetrates through the fixing plate and is fixedly connected to the pushing plate. The positioning pin is fixedly connected to the side of the pushing plate away from the electric telescopic rod. The two positioning holes are both provided on the side of the lower die box facing the pushing plate and are symmetrically arranged up and down with the center line in the up-down direction of the lower die box as the center. The outer diameter of the end of the positioning pin away from the pushing plate is adapted to the inner diameter of the positioning hole. When the upper wall or the lower wall of the lower die box faces upward and is parallel to the horizontal plane, the axis of the positioning pin is opposite to the axis of the upper set of the two positioning holes.

[0011] Preferably, the flipping drive includes two rotating shafts and a second motor. The two rotating shafts are both fixedly connected to the side walls of the lower die box facing and opposite to the rotating direction of the turntable. The axes of the two rotating shafts are opposite to each other and are both opposite to the center line in the up-down direction of the lower die box. The two rotating shafts are respectively rotatably connected to the lower wall of the turntable through a set of bearing seats. The second motor is fixedly connected to the lower wall of the turntable through a fixing seat, and the end of the output shaft of the second motor is fixedly connected to one of the two rotating shafts through a coupling. The lower die box is flipped along the axis of the rotating shaft by driving of the second motor.

[0012] Preferably, the ejector structure includes a top plate, multiple groups of ejector rods, and multiple groups of springs. A top cavity is provided on the side of the lower die box away from the cavity. The top plate is slidably connected to the inner sidewall of the top cavity. Multiple groups of ejector rods are fixedly connected to the side of the top plate facing the lower die box. The side of multiple groups of ejector rods away from the top plate all penetrate through the inner wall of the lower die box and extend into the cavity. An insert is provided at the end of the ejector rod extending into the cavity. The end of the insert away from the ejector rod is flush with the inner lower wall of the cavity. Multiple groups of springs are respectively sleeved on the outer walls of multiple groups of ejector rods and are all located between the top plate and the lower die box.

[0013] Preferably, the ejector drive is a knockout cylinder. The knockout cylinder is fixedly connected to the lower wall of the cover plate through a clamping plate. The extending shaft of the knockout cylinder is provided at the end away from the cover plate and is vertically opposite to the unloading station.

[0014] (III) Beneficial effects The present invention provides a core shooting machine for casting molding. It has the following beneficial effects: 1. Compared with the prior art, in this core shooting machine for casting molding, a core shooting station, a vacant position, a sand casting station, a secondary heating station, an unloading station, and a cleaning station are set on the turntable. Through the rotation of the first motor in cooperation with the flipping drive, the die closing drive device, the ejector structure, the discharging structure, and the cleaning structure, the entire working process of the core shooting machine is automated, greatly improving the production efficiency.

[0015] 2. Compared with the prior art, before and after the lower die box is flipped, the positioning pin is driven by the electric telescopic rod to cooperate with the positioning hole on the outer wall of the lower die box to position the lower die box, ensuring that the lower die box remains stationary during die closing and core shooting, ejecting, and cleaning, improving the operation accuracy of the equipment.

[0016] 3. Compared with the prior art, a cleaning station is set behind the unloading station. The excess sand on the die closing surface and in the cavity is cleaned by blowing with compressed air and then sucking with a negative pressure pump, improving the die closing accuracy and avoiding pollution to the surrounding environment during the cleaning process. Description of the drawings

[0017] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a partial front view of the connection structure of the upper cover and the cover plate of the present invention; Figure 3 It is a partial top view of the structure of the base, turntable, lower die box, and conveyor belt of the present invention; Figure 4 For the present invention Figure 3 The partial enlarged view at A in; Figure 5 It is a partial top view cross-sectional view of the structure of the base, recycling box, conveyor belt, and dust cover of the present invention; Figure 6 For the present invention Figure 5 Partial enlarged view at position B in the present invention; Figure 7 Partial sectional view of the base structure of the present invention in a face-up direction; Figure 8 Partial sectional view of the connection between the straight partition and the shielding structure of the present invention; Figure 9 Partial side view of the cleaning structure of the present invention; Figure 10 Partial sectional view of the lower mold box, flipping drive and positioning structure of the present invention.

[0018] Wherein, 1. Base; 101. Straight partition; 102. Arc-shaped plate; 103. Fixed ring; 1011. Window; 2. Upper cover; 3. Visual window; 4. Cover plate; 5. First motor; 6. Sand inlet pipe; 7. Discharge port; 8. Support; 9. Conveyor belt; 10. Recycling barrel; 11. Handle; 12. Slide table; 13. Upper template; 14. Clamping plate; 15. Material pushing cylinder; 16. Turntable; 17. Through cavity; 18. Rotating shaft; 19. Lower mold box; 1901. Ejecting cavity; 20. Ejecting rod; 21. Fixed plate; 22. First guide rod; 23. Pushing plate; 24. Electric telescopic rod; 25. Support plate; 26. Dust-proof cover; 27. Air blowing pipe; 2701. Air inlet joint; 28. Dust suction port; 2801. Dust suction pipe; 29. Elastic rubber plate; 30. Second guide rod; 31. Lifting cylinder; 32. Second motor; 3201. Fixed seat; 33. Top plate; 34. Spring; 35. Positioning hole; 36. Positioning pin. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment: As Figures 1 to 10As shown in the figure, an embodiment of the present invention provides a core shooting machine for casting molding, which includes a base 1, a sand blasting box, a compressed air supply device, a negative pressure pump, a filter box, a mold clamping drive device, a slide table 12, an upper template 13, and six lower mold boxes 19. The upper wall of the base 1 is fixedly connected with an upper cover 2. A visual window 3 is arranged on the front wall of the upper cover 2. The upper end of the upper cover 2 is fixedly connected with a cover plate 4. The slide table 12 is arranged on the lower wall of the cover plate 4 through the mold clamping drive device and is located near the inner rear wall of the upper cover 2. The upper template 13 is fixedly connected to the lower wall of the slide table 12. A sand inlet pipe 6 is fixedly connected to the upper wall of the cover plate 4 and near the rear side position. A first motor 5 is fixedly connected to the center position of the upper wall of the cover plate 4. The extending shaft of the first motor 5 penetrates through the cover plate 4 and extends into the interior of the upper cover 2. The end of the extending shaft of the first motor 5 is fixedly connected with a turntable 16. Six through cavities 17 are arranged on the inner wall of the turntable 16. The six through cavities 17 are all circumferentially equally distributed with the center of the turntable 16 as the center. The six lower mold boxes 19 are respectively rotatably connected inside the six through cavities 17. A cavity is arranged on the upper wall of the lower mold box 19. In the top view projection of the six through cavities 17, starting from the zero position and rotating counterclockwise, they are the core shooting station, the empty position, the sand turning station, the secondary heating station, the unloading station, and the cleaning station in sequence. The upper template 13 is vertically opposite to the core shooting station. In this embodiment, the sand blasting box, the compressed air supply device, the negative pressure pump, the filter box, and the mold clamping drive device are all existing technologies in the market. A heating device identical to the existing technology is arranged inside the lower mold box 19 for heating the sand to form a shell and solidify. In this embodiment, a core shooting station, an empty position, a sand turning station, a secondary heating station, an unloading station, and a cleaning station are arranged on the turntable 16. The rotation of the turntable 16 is driven by the rotation of the first motor 5. Cooperating with the flipping drive, the mold clamping drive device, the ejecting structure, the discharging structure, and the cleaning structure, the entire working process of the core shooting machine is automated, greatly improving the production efficiency. By controlling the heating temperature of the heating device when the lower mold box 19 rotates from the core shooting station to the sand turning station, the shell thickness can be effectively controlled. All the electrically powered parts during rotation are powered through common slip rings in the market, which can avoid the problem of wire entanglement during rotation operations; In order to recycle the excess sand, the base 1 is composed of a straight partition 101, an arc plate 102, and a fixing ring 103 located at the top of the straight partition 101 and the arc plate 102. The straight partition 101 is located on the left side of the arc plate 102. A recycling structure for recycling sand is arranged on the left side of the straight partition 101. The recycling structure includes a recycling bucket 10 and a handle 11. The recycling bucket 10 is arranged on the left side of the straight partition 101 and is in contact with the straight partition 101. The handle 11 is arranged on the side of the recycling bucket 10 away from the straight partition 101. The recycling bucket 10 is composed of a barrel body and a barrel wall. The barrel wall and the arc plate 102 of the base 1 are combined into a circle. The height of the barrel body is lower than the lower wall of the lower mold box 19. The barrel body is vertically opposite to the empty position and the sand turning station. When the lower mold box 19 rotates above the recycling bucket 10, the lower mold box 19 is driven by a second motor 32 to flip along the axis of the rotating shaft 18, and the excess sand that does not participate in solidification in the lower mold box 19 can be poured out for recycling; In order to reduce dust when recycling sand, a shielding structure is provided on the inner wall of the straight partition 101 to prevent dust from escaping. The shielding structure includes two groups of windows 1011. The two groups of windows 1011 are both provided on the inner wall of the straight partition 101 and are both connected to the upper end of the straight partition 101. The two groups of windows 1011 are respectively located between the core shooting station and the empty station and between the sand casting station and the secondary heating station in a top view. The side wall of the straight partition 101 and the two groups of windows 1011 are provided with multiple groups of windows for covering the windows. The elastic rubber sheet 29 of 1011 is fixed at one end in the length direction. When the turntable 16 drives the lower mold box 19 to rotate, it gives way through the window 1011, and the elastic rubber sheet 29 covers the window 1011. When the lower mold box 19 passes by, the elastic rubber sheet 29 will avoid it through its own elasticity, and then reset through elasticity to form a state of continuing to cover the window 1011. After the two windows 1011 are covered by the elastic rubber sheet 29, the dust during sand recovery can be effectively reduced. In order to facilitate product discharge, a discharge port 7 is provided on the right front wall of the arc plate 102, and a discharge structure is provided inside the discharge port 7. The discharge structure is opposite to the unloading station in upper and lower directions. The discharge structure includes a bracket 8 and a conveyor belt 9. The bracket 8 is arranged inside the discharge port 7, and the conveyor belt 9 is arranged on the upper wall of the bracket 8. The end of the conveyor belt 9 extending into the interior of the base 1 is opposite to the unloading station in upper and lower directions. The end of the conveyor belt 9 away from the interior of the base 1 extends toward the right front of the base 1. The product ejected from the cavity by the ejection structure falls on the upper wall of the conveyor belt 9 and is conveyed outward by the conveyor belt 9. The belt of the conveyor belt 9 can be a common leather belt on the market, which can effectively reduce the impact force when the product falls and avoid product damage. For the convenience of cleaning the lower die box 19 after discharging, a cleaning structure for cleaning the cavity is provided at the right rear wall of the arc-shaped plate 102. The cleaning structure is vertically opposite to the cleaning station. The cleaning structure includes a support plate 25, a dust-proof cover 26 and a lifting cylinder 31. The support plate 25 is fixedly connected to the inner side wall of the arc-shaped plate 102 and is located below the cleaning station. The dust-proof cover 26 is slidably connected above the support plate 25 through multiple groups of second guide rods 30. The lifting cylinder 31 is fixedly connected to the lower wall of the support plate 25. The end of the extending shaft of the lifting cylinder 31 penetrates through the inner wall of the support plate 25 and is fixedly connected to the lower wall of the dust-proof cover 26. A cleaning cavity is provided on the upper wall of the dust-proof cover 26. The top view projection size of the cleaning cavity is adapted to the top view projection size of the lower die box 19. Multiple groups of air blowing pipes 27 are sequentially arranged on the inner lower wall of the dust-proof cover 26 in the front-back direction. Multiple groups of air blowing holes are provided on the upper walls of the multiple groups of air blowing pipes 27. An air inlet joint 2701 communicating with the air blowing pipes 27 is provided on the side wall of the dust-proof cover 26. One end of the air inlet joint 2701 away from the dust-proof cover 26 is connected to a compressed air supply device through a pipeline. A dust suction port 28 communicating with the inside of the cleaning cavity is fixedly connected to the lower wall of the dust-proof cover 26 at the central position. A dust suction pipe 2801 is fixedly connected to the lower wall of the dust-proof cover 26 and is located below the dust suction port 28. One end of the dust suction pipe 2801 away from the dust-proof cover 26 is connected to a negative pressure pump through a filter box. After the product in the cavity is ejected, the lower die box 19 rotates above the dust-proof cover 26. The lifting cylinder 31 drives the dust-proof cover 26 to rise and cover the outer wall of the lower die box 19. The floating sand inside the cavity and on the mold clamping surface is swept off by the compressed air blown out by the air blowing pipes 27, and then is sucked away by the negative pressure generated by the negative pressure pump through the dust suction port 28, maintaining the cleanliness of the mold clamping surface and effectively improving the mold clamping accuracy; To realize the flipping action of the lower die box 19, a flipping drive for driving the lower die box 19 to flip is provided between the turntable 16 and the lower die box 19. The flipping drive includes two groups of rotating shafts 18 and a second motor 32. The two groups of rotating shafts 18 are both fixedly connected to the two side walls of the lower die box 19 facing and facing away from the rotating direction of the turntable 16. The axes of the two groups of rotating shafts 18 are opposite to each other and are both opposite to the vertical center line of the lower die box 19. The two groups of rotating shafts 18 are respectively rotatably connected to the lower wall of the turntable 16 through a group of bearing seats. The second motor 32 is fixedly connected to the lower wall of the turntable 16 through a fixing seat 3201, and the end of the output shaft of the second motor 32 is fixedly connected to one of the two groups of rotating shafts 18 through a coupling. The lower die box 19 is driven by the second motor 32 to flip along the axis of the rotating shaft 18. The second motor 32 is directly connected to the rotating shaft 18, which can effectively reduce the error caused by transmission. When the second motor 32 rotates, it can drive the lower die box 19 to rotate around the axis of the rotating shaft 18 to realize the flipping action. At the same time, at the sand casting station, it can also drive the lower die box 19 to flip and pour sand and then swing back and forth to reduce the residual sand; For the stability of the lower mold box 19 before and after flipping, a positioning structure is also provided between the turntable 16 and the lower mold box 19 for positioning the lower mold box 19 during core shooting and cleaning. The positioning structure includes a fixing plate 21, a push plate 23, an electric telescopic rod 24, a positioning pin 36, and two groups of positioning holes 35. The fixing plate 21 is fixedly connected to the upper wall of the turntable 16 and is located on one side of the through cavity 17. The electric telescopic rod 24 is fixedly connected to the side of the fixing plate 21 away from the through cavity 17. The push plate 23 is slidably connected to the side of the fixing plate 21 away from the electric telescopic rod 24 through a first guide rod 22. The extending end of the electric telescopic rod 24 penetrates through the fixing plate 21 and is fixedly connected to the push plate 23. The positioning pin 36 is fixedly connected to the side of the push plate 23 away from the electric telescopic rod 24. The two groups of positioning holes 35 are both arranged on the side of the lower mold box 19 facing the push plate 23 and are symmetrically arranged up and down with the center line in the up and down direction of the lower mold box 19 as the center. The outer diameter of the end of the positioning pin 36 away from the push plate 23 is adapted to the inner diameter of the positioning hole 35. When the upper wall or the lower wall of the lower mold box 19 faces upward and is parallel to the horizontal plane, the axis of the positioning pin 36 is opposite to the axis of the upper set of positioning holes 35 in the two groups of positioning holes 35. During flipping, the extending shaft of the electric telescopic rod 24 retracts, driving the positioning pin 36 to be pulled out of the positioning hole 35, so that the lower mold box 19 can be rotated. After the flipping is completed, the extending shaft of the electric telescopic rod 24 extends, driving the positioning pin 36 to insert into the positioning hole 35. The positioning pin 36 and the rotating shaft 18 act together to fix the lower mold box 19, improving the stability of the lower mold box 19 during mold closing and core shooting operations and cleaning operations; To facilitate the ejection of the product from the cavity, a ejector structure for ejecting the product from the cavity is provided on the side of the lower mold box 19 away from the cavity. The ejector structure includes a top plate 33, multiple groups of ejector rods 20, and multiple groups of springs 34. A ejector cavity 1901 is provided on the side of the lower mold box 19 away from the cavity. The top plate 33 is slidably connected to the inner side wall of the ejector cavity 1901. Multiple groups of ejector rods 20 are fixedly connected to the side of the top plate 33 facing the lower mold box 19. The sides of the multiple groups of ejector rods 20 away from the top plate 33 all penetrate through the inner wall of the lower mold box 19 and extend into the cavity. An insert is provided at the end of the ejector rod 20 extending into the cavity, and the end of the insert away from the ejector rod 20 is flush with the inner lower wall of the cavity. The multiple groups of springs 34 are respectively sleeved on the outer walls of the multiple groups of ejector rods 20 and are all located between the top plate 33 and the lower mold box 19. During discharging, the multiple groups of ejector rods 20 are driven by the knockout cylinder 15 to eject the product from the cavity to achieve discharging. After the knockout cylinder 15 returns to its original position, the multiple groups of ejector rods 20 are reset by the elastic force of the springs 34; In order to realize the ejecting action of the ejecting structure, an ejecting drive for driving the ejecting structure to act is arranged at a position on the lower wall of the cover plate 4 and vertically opposite to the discharging station. The ejecting drive is a punching cylinder 15. The punching cylinder 15 is fixedly connected to the lower wall of the cover plate 4 through a clamping plate 14. The extending shaft of the punching cylinder 15 is arranged at one end far from the cover plate 4 and is vertically opposite to the discharging station. When the extending shaft of the punching cylinder 15 extends, it can push the top plate 33 in the lower die box 19 directly below the punching cylinder 15, thereby pushing the ejector rod 20 to push out the product.

[0021] Working principle: The core shooting station, empty position, sand casting station, secondary heating station, unloading station and cleaning station are set on the turntable 16. The rotation of the first motor 5 drives the rotation of the turntable 16, and cooperates with the flipping drive, mold clamping drive device, ejector structure, discharging structure and cleaning structure to realize the automation of all working processes of the core shooter, greatly improving the production efficiency. By controlling the heating temperature of the heating device when the lower mold box 19 rotates from the core shooting station to the sand casting station, the shell thickness can be effectively controlled. When the lower mold box 19 rotates above the recovery bucket 10, the second motor 32 drives the lower mold box 19 to flip along the axis of the rotating shaft 18, and the redundant sand that does not participate in solidification in the lower mold box 19 can be poured out and recovered. The elastic rubber plate 29 covers the window 1011. When the lower mold box 19 passes by, the elastic rubber plate 29 will avoid by its own elasticity and then return to its original state through elastic reset to form a state of continuing to cover the window 1011. After the two windows 1011 are covered by the elastic rubber plate 29, the dust during sand recovery can be effectively reduced. The product ejected from the cavity by the ejector structure falls on the upper wall of the conveyor belt 9 and is conveyed outwards through the conveyor belt 9. The belt of the conveyor belt 9 can be selected from common leather belts on the market, which can effectively reduce the impact force when the product drops and avoid product damage. After the product in the cavity is ejected, the lower mold box 19 rotates above the dust-proof cover 26, and the lifting cylinder 31 drives the dust-proof cover 26 to rise and cover the outer wall of the lower mold box 19. The floating sand inside the cavity and on the mold clamping surface is swept off by the compressed air blown out by the air blowing pipe 27 and then sucked away by the negative pressure generated by the negative pressure pump through the dust suction port 28, keeping the mold clamping surface clean and effectively improving the mold clamping accuracy. The lower mold box 19 is driven by the second motor 32 to flip along the axis of the rotating shaft 18. The second motor 32 is directly connected to the rotating shaft 18, which can effectively reduce the error caused by transmission. When the second motor 32 rotates, it can drive the lower mold box 19 to rotate around the axis of the rotating shaft 18 to realize the flipping action. At the same time, at the sand casting station, it can also drive the lower mold box 19 to swing back and forth after flipping and pouring sand to reduce the residual sand. During flipping, the telescopic shaft of the electric telescopic rod 24 retracts, driving the positioning pin 36 to be pulled out of the positioning hole 35, so that the lower mold box 19 can be rotated. When the flipping is completed, the telescopic shaft of the electric telescopic rod 24 extends, driving the positioning pin 36 to insert into the positioning hole 35. The positioning pin 36 and the rotating shaft 18 work together to fix the lower mold box 19, improving the stability of the lower mold box 19 during mold clamping and core shooting and cleaning operations. During discharging, multiple ejector rods 20 are driven by the knockout cylinder 15 to eject the product from the cavity to realize discharging. After the knockout cylinder 15 returns, the multiple ejector rods 20 are reset by the spring force of the spring 34. When the extending shaft of the knockout cylinder 15 extends, it can push the top plate 33 in the lower mold box 19 directly below the knockout cylinder 15, thereby pushing the ejector rods 20 to push out the product.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casting core shooting machine, characterized in that: The invention comprises a base (1), a sandblasting box, a compressed air supply device, a negative pressure pump, a filter box, a mold clamping drive device, a slide (12), an upper mold plate (13) and six groups of lower mold boxes (19), wherein the upper wall of the base (1) is fixedly connected to an upper cover (2), a visual window (3) is arranged on the front wall of the upper cover (2), a cover plate (4) is fixedly connected to the upper end of the upper cover (2), the slide (12) is arranged on the lower wall of the cover plate (4) and is located near the inner rear wall of the upper cover (2) through the mold clamping drive device, the upper mold plate (13) is fixedly connected to the lower wall of the slide (12), a sand inlet pipe (6) is fixedly connected to the upper wall of the cover plate (4) and is located near the rear side, and a first motor (5) is fixedly connected to the upper wall of the cover plate (4) and is located at the center. The first motor (5) extends through a shaft that passes through the cover plate (4) and extends into the interior of the upper cover (2). The end of the shaft that extends from the first motor (5) is fixedly connected to a turntable (16). The inner wall of the turntable (16) is provided with six groups of through cavities (17). The six groups of through cavities (17) are equally distributed in a circle with the center of the turntable (16) as the center. The six groups of lower mold boxes (19) are rotatably connected to the interior of the six groups of through cavities (17). The upper wall of the lower mold box (19) is provided with a mold cavity. The six groups of through cavities (17) rotate counterclockwise from the zero position as the starting point in a top view, and are respectively a core shooting station, an empty position, a sand casting station, a secondary heating station, a discharge station, and a cleaning station. The upper mold plate (13) is opposite to the core shooting station in upper and lower directions.

2. A casting core shooting machine according to claim 1, characterized in that: The base (1) is composed of a straight partition (101), an arc-shaped plate (102), and a fixing ring (103) located on the top of the straight partition (101) and the arc-shaped plate (102); the straight partition (101) is located on the left side of the arc-shaped plate (102); a recovery structure for recovering sand is provided on the left side of the straight partition (101); a shielding structure for preventing dust from escaping is provided on the inner wall of the straight partition (101); a discharge port (7) is provided on the right front wall of the arc-shaped plate (102); a discharge structure is provided inside the discharge port (7); the discharge structure is opposite to the unloading station in upper and lower directions; the right side of the arc-shaped plate (102) is provided with a discharge port (7); A cleaning structure for cleaning the mold cavity is arranged at the rear wall, the cleaning structure is vertically opposite to the cleaning station, a flipping drive for driving the lower mold box (19) to flip is arranged between the turntable (16) and the lower mold box (19), a positioning structure for positioning the lower mold box (19) during core shooting and cleaning is also arranged between the turntable (16) and the lower mold box (19), a ejection structure for ejecting the product from the mold cavity is arranged on the side of the lower mold box (19) away from the mold cavity, and an ejection drive for driving the ejection structure to move is arranged on the lower wall of the cover plate (4) and at a position vertically opposite to the unloading station.

3. A casting core shooting machine according to claim 2, characterized in that: The recycling structure comprises a recycling bucket (10) and a handle (11); the recycling bucket (10) is arranged on the left side of the straight partition (101) and is tightly pressed against the straight partition (101); the handle (11) is arranged on the side of the recycling bucket (10) away from the straight partition (101); the recycling bucket (10) is composed of a barrel body and a barrel wall; the barrel wall and the arc-shaped plate (102) of the base (1) are combined to form a circle; the barrel body is lower than the lower wall of the lower mold box (19); and the barrel body is opposite to the empty space and the sand-casting station in upper and lower directions.

4. A casting core shooting machine according to claim 3, characterized in that: The shielding structure comprises two groups of windows (1011), the two groups of windows (1011) are both arranged on the inner wall of the straight partition (101) and are both connected to the upper end of the straight partition (101), the two groups of windows (1011) are respectively located between the core shooting station and the empty position and between the sand casting station and the secondary heating station in a top view, and a plurality of groups of elastic rubber plates (29) for covering the windows (1011) are arranged on the side wall of the straight partition (101) and at the two groups of windows (1011), the elastic rubber plates (29) are fixed at one end in the length direction, and the turntable (16) drives the lower mold box (19) to rotate to make way through the windows (1011).

5. A casting core shooting machine according to claim 4, characterized in that: The discharge structure comprises a bracket (8) and a conveyor belt (9), wherein the bracket (8) is arranged inside the discharge port (7), and the conveyor belt (9) is arranged on the upper wall of the bracket (8). One end of the conveyor belt (9) extending into the interior of the base (1) is opposite to the unloading station in upper and lower directions, and one end of the conveyor belt (9) away from the interior of the base (1) extends toward the right front of the base (1).

6. A casting core shooting machine according to claim 5, characterized in that: The cleaning structure comprises a support plate (25), a dust cover (26) and a lifting cylinder (31); the support plate (25) is fixedly connected to the inner wall of the arc plate (102) and is located below the cleaning station; the dust cover (26) is slidably connected to the upper part of the support plate (25) through a plurality of sets of second guide rods (30); the lifting cylinder (31) is fixedly connected to the lower wall of the support plate (25); the extended shaft end of the lifting cylinder (31) passes through the inner wall of the support plate (25) and is fixedly connected to the lower wall of the dust cover (26); the upper wall of the dust cover (26) is provided with a cleaning cavity; the top projection size of the cleaning cavity is adapted to the top projection size of the lower mold box (19); the inner wall of the dust cover (26) is provided with a cleaning cavity; The lower wall is provided with a plurality of groups of air blowing pipes (27) in a front-to-back distribution, and the upper walls of the plurality of groups of air blowing pipes (27) are provided with a plurality of groups of air blowing holes. The side wall of the dust cover (26) is provided with an air inlet joint (2701) which is in communication with the air blowing pipe (27), and one end of the air inlet joint (2701) which is away from the dust cover (26) is connected to a compressed air supply device through a pipeline. A dust suction port (28) which is in communication with the interior of the cleaning chamber is fixedly connected to the lower wall of the dust cover (26) and in the middle thereof. A dust suction pipe (2801) is fixedly connected to the lower wall of the dust cover (26) and located below the dust suction port (28), and one end of the dust suction pipe (2801) which is away from the dust cover (26) is connected to a negative pressure pump through a filter box.

7. A casting core shooting machine according to claim 6, characterized in that: The positioning structure comprises a fixed plate (21), a push plate (23), an electric telescopic rod (24), a positioning pin (36) and two groups of positioning holes (35); the fixed plate (21) is fixedly connected to the upper wall of the turntable (16) and is located on one side of the through cavity (17); the electric telescopic rod (24) is fixedly connected to the side of the fixed plate (21) away from the through cavity (17); the push plate (23) is slidably connected to the side of the fixed plate (21) away from the electric telescopic rod (24) through a first guide rod (22); the electric telescopic rod (24) extends out of the shaft end portion and passes through the fixed plate (21) and is connected to the push plate (2 3) fixed connection, the positioning pin (36) is fixedly connected to the side of the push plate (23) away from the electric telescopic rod (24), the two groups of positioning holes (35) are arranged on the side of the lower mold box (19) facing the push plate (23) and are symmetrically arranged with the center line of the lower mold box (19) in the vertical direction as the center, the outer diameter of the end of the positioning pin (36) away from the push plate (23) is adapted to the inner diameter of the positioning hole (35), and when the upper wall or the lower wall of the lower mold box (19) is facing upward and parallel to the horizontal plane, the positioning pin (36) is opposite to the axis of the upper group of positioning holes (35) in the two groups of positioning holes (35).

8. A casting core shooting machine according to claim 7, characterized in that: The flipping drive comprises two groups of rotating shafts (18) and a second motor (32). The two groups of rotating shafts (18) are fixedly connected to the two side walls of the lower mold box (19) facing and facing away from the rotation direction of the turntable (16). The axes of the two groups of rotating shafts (18) are opposite to each other and are opposite to the center line of the lower mold box (19) in the up-down direction. The two groups of rotating shafts (18) are rotatably connected to the lower wall of the turntable (16) through a group of bearing seats respectively. The second motor (32) is fixedly connected to the lower wall of the turntable (16) through a fixing seat (3201) and the end of the output shaft of the second motor (32) is fixedly connected to one of the two groups of rotating shafts (18) through a coupling. The lower mold box (19) is driven by the second motor (32) to flip along the axis of the rotating shaft (18).

9. A casting core shooting machine according to claim 8, characterized in that: The ejection structure comprises an ejection plate (33), a plurality of ejector rods (20) and a plurality of springs (34); an ejection cavity (1901) is provided on a side of the lower mold box (19) away from the mold cavity; the ejection plate (33) is slidably connected to the inner wall of the ejection cavity (1901); the plurality of ejector rods (20) are fixedly connected to the side of the ejection plate (33) facing the lower mold box (19); the sides of the plurality of ejector rods (20) away from the ejection plate (33) penetrate the inner wall of the lower mold box (19) and extend into the mold cavity; an insert is provided at one end of the ejector rod (20) extending into the mold cavity; the end of the insert away from the ejector rod (20) is flush with the lower wall of the inner side of the mold cavity; the plurality of springs (34) are respectively sleeved on the outer walls of the plurality of ejector rods (20) and are located between the ejection plate (33) and the lower mold box (19).

10. A casting core shooting machine according to claim 9, characterized in that: The material ejection drive is a material ejection cylinder (15), which is fixedly connected to the lower wall of the cover plate (4) via a clamping plate (14), and an extension shaft of the material ejection cylinder (15) is arranged at an end away from the cover plate (4) and opposite to the unloading station in upper and lower directions.

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