Device for producing sand core of non-precoated sand shell of supercharger bearing shell

Abstract

The invention relates to a device for producing a sand core of a non-precoated sand shell of a supercharger bearing shell, which comprises a core shooter, is equipment for the casting industry, and comprises a stand column component, a sand shooting component, a mold frame component and a base, the negative pressure structure is arranged on one side of the mold frame component and is intermittently communicated with the interior of the mold frame component; in the negative pressure structure, a toothed plate in a sliding rail is connected with a reset spring, the spring is fixed to a limiting baffle, a push rod in the reset spring is connected with a toothed rod, the toothed rod is connected with a driving gear and other components, an upward lifting block in the toothed plate is matched with a mold slope lifting rod, a barge-back rod is arranged above the sliding rail, and a toothed plate side face air exhaust ratchet gear is connected with a reciprocating lead screw and the like. The exhaust pipe is communicated with the air storage tank which is provided with an electromagnetic valve; the device improves the efficiency and the quality, reduces the cost and the labor intensity, when the mold is closed, the mold drives the component to move upwards to exhaust air so as to reduce flying sand, and after core shooting, the component is reset to clean and recycle molding sand.

Description

Technical Field

[0001] The invention relates to the technical field of supercharger production and processing, and in particular to a device for producing a sand core of an uncoated sand shell of a supercharger bearing housing. Background Art

[0002] In traditional casting processes, sand cores are often used to form the internal cavity or specific shape of the casting in order to obtain complex internal structures or improve certain properties of the casting (such as strength, wear resistance, etc.). However, in the production of complex and extremely high-precision castings such as turbocharger bearing housings, traditional sand cores may not meet their specific needs, such as higher dimensional accuracy, more complex internal structures, or better surface quality. The uncoated sand shell sand core production device for turbocharger bearing housings is designed to solve these problems. By using uncoated sand as raw material and combining it with advanced core making technology, the device can produce high-precision, high-quality sand cores to meet the production needs of turbocharger bearing housings.

[0003] In the current production process of supercharger bearing housing, especially when using uncoated sand shell sand core technology, there are some challenges. When the mold is closed, a certain space is reserved for sand core molding. However, during the core shooting process, as the molding sand is pushed into the mold by high-pressure gas, the air originally in the mold will be forced out under the action of pressure. This process not only causes the occurrence of flying sand, but also may have an adverse effect on the working environment. In addition, after the core shooting operation is completed, a part of the molding sand will often remain at the sand shooting nozzle and the sand shooting port on the mold (left over when the sand shooting nozzle is lifted, and adhered when the sand shooting nozzle shoots sand). If these retained molding sands are not handled, it will affect the quality and production efficiency of subsequent products. At present, the industry generally uses electric scrapers or manual methods to remove these residues and recycle them. Although this method can solve the problem, it is inefficient and costly, and it also increases the labor intensity of workers.

[0004] Therefore, a device for producing a sand core of an uncoated sand shell of a supercharger bearing housing is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a sand core production device for a supercharger bearing housing without a coated sand shell, so as to solve the problems of pressure release and flying sand during core shooting and sand retention after core shooting in the sand core production device for a supercharger bearing housing without a coated sand shell proposed in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a device for producing a sand core of a supercharger bearing housing without a coating sand shell, comprising: The core shooting machine is a kind of equipment used in the foundry industry. Its core components include column parts, sand shooting parts, mold frame parts and base; The negative pressure structure is arranged on one side of the mold frame component and is intermittently connected with the interior of the mold frame component; The negative pressure structure includes a slide rail, a toothed plate is slidably arranged inside the slide rail, and a return spring is fixedly connected to the upper end of the toothed plate, and the upper end of the return spring is fixed to a limiting baffle integrally arranged above the inner part of the slide rail, a pair of push rods are inserted above the inner part of the return spring, and the upper end of the pair of push rods is fixed to the toothed rod through the limiting baffle, the side surface of the toothed rod is meshed with the driving gear for transmission, the rotating shaft of the driving gear is connected to the rotating shaft of one of the bevel gears inside the bevel gear box through a coupling, and the two inside the bevel gear box are located The axles of the bevel gears are fixed to the swing tubes through connecting rods, a grinding roller is rotatably arranged inside the swing tube, and the upper and lower ends of the grinding roller are respectively fixed to the cleaning head and the wind wheel, an upper lifting block is slidably limited inside the tooth plate by a spring rod, an inclined lifting rod for lifting the upper lifting block is fixedly arranged on the side of the lower mold of the mold frame component according to the position of the upper lifting block, a retracting rod is connected to the surface of the slide rail just above the upper lifting block through bolts, an air extraction ratchet gear is meshed and transmitted on the side of the tooth plate, and the axle of the air extraction ratchet gear is rotatably arranged on the slide The reciprocating screw inside the box is fixed, and a reciprocating slider is provided on the rod body of the reciprocating screw for reciprocating transmission, and the reciprocating slider is slidably limited and arranged inside the sliding box, and the front and rear sides of the reciprocating slider are fixed to the piston rod slidably arranged inside the air extraction pipe through a connecting rod, and the air extraction pipe is integrally connected and arranged on the front and rear sides of the sliding box, and a through hole is provided at the axial center position of the piston rod inside the air extraction pipe, and a second one-way valve is arranged inside the through hole at the end close to the air inlet, and the side of the air extraction pipe is fixedly connected to the air storage tank through a pipeline, and the storage tank Solenoid valves for controlling air release are arranged above and below the side of the gas tank near the exhaust pipe, wherein the output interfaces of the upper solenoid valves are fixedly connected with air guide pipes, one end of which is connected with the space of the mold core, and a check valve is arranged at the connecting end, and the output interface of the lower solenoid valve is connected with the air inlet interface of the gas rack fixed on the upper surface of the mold through a pipeline, and the gas rack is fixedly connected with a conduit at the end of the airway, and one end of the conduit is fixedly connected to the side of the air guide pipe and close to one end of the mold.

[0007] Preferably, the slide rail is a slide rail with a T-slot inside, and the upper end is fixed to the upper part of the mold frame component by bolts, and is located near the middle of the left side of the mold.

[0008] Preferably, the limiting baffles are provided with two upper and lower ones, and there is a specified spacing distance between the two limiting baffles.

[0009] Preferably, the interior of the gear rod is hollow, and the upper end is moved, limited and reset by a spring and a limiting baffle located above, and the driving gear is rotatably arranged in a bearing frame fixedly arranged on the surface of the slide rail.

[0010] Preferably, the bevel gear box is fixed to the upper part of the mold frame component by bolts, and has at least three sets of meshing bevel gears inside.

[0011] Preferably, the cleaning head is a two-layer conical structure, and the two layers are movably connected in a lifting manner through a retractable spring rod, and the cleaning head and the wind wheel are both within the coverage range of the upper and lower end pipe openings of the swing pipe.

[0012] Preferably, one end of the upper lifting block passing through the tooth plate is provided with an inclined surface inclined from top to bottom and from left to right, and the angles of the inclined lifting rod and the inclined surface of the retracting rod are the same as those of the upper lifting block.

[0013] Preferably, one end of the exhaust pipe is fixed to the side of the mold and connected to the core shooting space of the mold, and a first one-way valve is arranged at the end connected to the core shooting space, and a compressible gas pressure spring is provided inside the air storage tank from the position connected to the exhaust pipe to the other end.

[0014] Preferably, the upper surface of the air rack is provided with a core shooting opening corresponding to the sand shooting nozzle of the sand shooting component on the path of the air channel, and when no core is shot, the swing tube is located directly above the core shooting opening, the cleaning head is softly plugged into the sand shooting nozzle, and the wind wheel is located inside the core shooting opening.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a slide rail, a tooth plate, a return spring, a retracting rod, an upper lifting block, a spring rod, an inclined lifting rod, an air extraction pipe, a first one-way valve, a piston rod, a second one-way valve, a reciprocating slider, a reciprocating screw rod, an air extraction ratchet gear, a slide box and an air storage tank. During the mold closing process, through the ingenious mechanical structure linkage, when the mold moves upward, a series of components are driven to work together to effectively extract the air inside the mold. This efficient air extraction mechanism can significantly reduce the occurrence of flying sand during the core shooting process, improve the working environment, and enhance the safety and stability of the production process; 2. The present invention arranges the slide rail, the tooth plate, the push rod, the limiting baffle, the tooth rod, the driving gear, the bevel gear box, the swing pipe, the cleaning head, the roller, the wind wheel, the air storage tank, the solenoid valve, the air guide pipe, the check valve, the air rack, the core shooting port and the airway. After the core shooting operation is completed, the sand shooting nozzle and the surrounding area can be completely cleaned through the resetting and coordinated work of a series of components, which can not only remove the residual molding sand, but also recycle the cleaned molding sand, thereby avoiding the waste of molding sand and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structural view of the present invention; Figure 2 It is a schematic diagram of the sand core mold of the present invention; Figure 3 It is a schematic diagram of the negative pressure structure and mold of the present invention; Figure 4 It is a schematic diagram of the negative pressure structure of the present invention; Figure 5 It is a schematic diagram of the slide rail and its connection structure of the present invention; Figure 6 It is a cross-sectional view of the slide rail and its connection structure of the present invention; Figure 7 It is a cross-sectional schematic diagram of the swing pipe of the present invention; Figure 8 is a cross-sectional view of a tooth plate of the present invention; Fig. 9 It is a schematic diagram of the negative pressure structure of the present invention; Fig.10 It is a cross-sectional view of the negative pressure structure of the present invention.

[0017] In the figure: 1. Core shooting machine; 2. Negative pressure structure; 21. Slide rail; 211. Tooth plate; 2111. Push rod; 2112. Limit baffle; 2113. Tooth rod; 2114. Driving gear; 2115. Bevel gear box; 2116. Swing pipe; 2117. Cleaning head; 2118. Roller; 2119. Wind wheel; 212. Return spring; 213. Retract rod; 214. Lifting block; 2141. Spring rod; 2142. Inclined surface Lifting rod; 22, air extraction pipe; 221, first one-way valve; 222, piston rod; 2221, second one-way valve; 223, reciprocating slider; 224, reciprocating screw rod; 2241, air extraction ratchet gear; 225, slide box; 226, air storage tank; 2261, gas spring; 227, solenoid valve; 228, air guide pipe; 2281, check valve; 229, air rack; 2291, core shooting port; 2292, airway. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 10 The present invention provides a technical solution for a supercharger bearing housing non-coated sand shell sand core production device: A device for producing a sand core of a supercharger bearing housing without a coating on the outer shell, comprising: The core shooting machine 1 is a kind of equipment used in the foundry industry. Its core components include column parts, sand shooting parts, mold frame parts and base. The negative pressure structure 2 is arranged on one side of the mold frame component and is intermittently connected with the inside of the mold frame component; The negative pressure structure 2 includes a slide rail 21, which is a rail structure with a T-shaped groove inside, and the upper end of which is fixed to the upper part of the mold frame component by bolts, and is located near the middle of the left side of the mold. A tooth plate 211 is slidably arranged inside the slide rail 21, and a return spring 212 is fixedly connected to the upper end of the tooth plate 211, and the upper end of the return spring 212 is fixed to a limiting baffle 2112 integrally arranged on the upper part of the slide rail 21. The limiting baffle 2112 is provided with two upper and lower limiting baffles 2112, and the two limiting baffles 2112 have a specified spacing distance, and the tooth plate 21 A convex slide groove is provided in the middle and lower position of the interior of the slide groove, and a lifting block 214 is provided inside the slide groove through a spring rod 2141 for sliding and limiting. An end of the lifting block 214 passing through the tooth plate 211 is provided with an inclined surface inclined from top to bottom and from left to right. An inclined surface lifting rod 2142 for lifting the lifting block 214 is fixedly provided on the side of the lower mold of the mold frame component according to the position of the lifting block 214, and the angle of the inclined surface of the inclined surface lifting rod 2142 is the same as that of the lifting block 214. A retracting rod 213 is connected to the surface of the slide rail 21 by bolts just above the lifting block 214, and the retracting rod 213 is connected to the upper surface of the upper lifting block 214 by bolts. The lower end of the tooth plate 211 is provided with an inclined surface that can push the lifting block 214 to move inward, and the side meshing transmission of the tooth plate 211 is provided with an air extraction ratchet gear 2241, and the wheel axle of the air extraction ratchet gear 2241 is fixed with a reciprocating screw rod 224 that is rotatably arranged inside the slide box 225, and a reciprocating slider 223 is provided on the rod body of the reciprocating screw rod 224 for reciprocating transmission, and the reciprocating slider 223 is slidingly limited and arranged inside the slide box 225, and the center position of the front and rear sides of the reciprocating slider 223 is fixed with a piston rod 222 that is slidingly arranged inside the air extraction pipe 22 through a connecting rod, and thereby the piston rod 222 is pressed. The exhaust pipe 22 is driven reciprocatingly in a linear manner inside the exhaust pipe 22. The exhaust pipe 22 is integrally connected to the front and rear sides of the slide box 225, and a through hole is opened at the axial center position of the piston rod 222 inside the exhaust pipe 22, and a second one-way valve 2221 is arranged inside the through hole at the end close to the air inlet. One end of the exhaust pipe 22 is fixed to the side of the mold and is connected to the space of the mold core shooting, and a first one-way valve 221 is arranged at the end connected to the core shooting space, and the side of the exhaust pipe 22 is fixedly connected to the air storage tank 226 through a pipeline at the end away from the first one-way valve 221.

[0020] When the mold is closed, the mold moving upward lifts the upper lifting block 214 through the inclined lifting rod 2142, driving the tooth plate 211 to move up along the slide rail 21, compressing the reset spring 212, and after the upper inclined surface of the upper lifting block 214 contacts the lower inclined surface of the retracting rod 213, the upper lifting block 214 is pressed to retract, and the inclined lifting rod 2142 cannot support it. The tooth plate 211 quickly moves down and resets under the action of the reset spring 212. During the downward movement, the tooth plate 211 drives the vacuum ratchet gear 2241 to drive the reciprocating screw rod 224 to rotate, so that the reciprocating slider 223 is driven The movable piston rod 222 moves back and forth along the exhaust pipe 22 to exhaust air. When the piston rod 222 moves to the left, the space between the second one-way valve 2221 end and the exhaust pipe 22 increases to form a negative pressure, forcing the first one-way valve 221 to open and exhaust air; when it moves to the right, the gas is squeezed to open the second one-way valve 2221, and the gas enters the piston rod 222 and then to the space at the left end of the exhaust pipe 22, and continues to enter the air storage tank 226 to compress the air pressure spring 2261 until the tooth plate 211 and the return spring 212 are reset, thereby releasing the drive to the exhaust ratchet gear 2241.

[0021] In summary, through the arrangement of the slide rail 21, the tooth plate 211, the return spring 212, the retracting rod 213, the lifting block 214, the spring rod 2141, the inclined lifting rod 2142, the exhaust pipe 22, the first one-way valve 221, the piston rod 222, the second one-way valve 2221, the reciprocating slider 223, the reciprocating screw rod 224, the exhaust ratchet gear 2241, the slide box 225 and the air storage tank 226, during the mold closing process, through the ingenious mechanical structure linkage, when the mold moves upward, it drives a series of components to work together to effectively extract the air inside the mold. This efficient exhaust mechanism can significantly reduce the occurrence of flying sand during the core shooting process, improve the working environment, and enhance the safety and stability of the production process.

[0022] As an embodiment of the present invention, Figures 2 to 10As shown, a pair of push rods 2111 are inserted above the interior of the reset spring 212, and the upper end of the push rod 2111 is inserted through the limiting baffle 2112 located below and fixed with the gear rod 2113 located between the limiting baffles 2112. The interior of the gear rod 2113 is hollow, and the upper end is moved and limited and reset with the limiting baffle 2112 located above by a spring. The side of the gear rod 2113 is meshed with the driving gear 2114 for transmission, and the driving gear 2114 is rotatably set in a bearing frame fixedly set on the surface of the slide rail 21. The rotating shaft of the driving gear 2114 is connected to the rotating shaft of one of the bevel gears in the bevel gear box 2115 through a coupling, and the bevel gear box 2115 is fixed to the upper part of the mold frame component by bolts. And there are at least three sets of meshing bevel gears inside, the axle of one of the bevel gears located on the front and rear sides of the bevel gear box 2115 is fixed to the swing tube 2116 located on the right side of the bevel gear box 2115 through connecting rods, a bow-tie-shaped tubular space is opened inside the swing tube 2116, and a grinding roller 2118 is rotatably arranged at the center position of the tube, the upper and lower ends of the grinding roller 2118 respectively extend through the bearing frame to pass through the swing tube 2116 and are fixed to the cleaning head 2117 and the wind wheel 2119, wherein the cleaning head 2117 is a two-layer conical structure, and the two layers are connected by a retractable spring structure for lifting and lowering, and the cleaning head 2117 and the wind wheel 2119 are both within the coverage range of the upper and lower end pipe openings of the swing tube 2116.

[0023] The inside of the gas storage tank 226 is provided with a compressible gas pressure spring 2261 from the position connected to the exhaust pipe 22 to the other end, and the electromagnetic valve 227 for controlling the deflation is arranged above and below the side of the gas storage tank 226 near the exhaust pipe 22, wherein the output interface of the electromagnetic valve 227 located at the top is fixedly connected to the air guide pipe 228, and one end of the air guide pipe 228 is connected to the space of the mold core, and a check valve 2281 is arranged at the connecting end, and the output interface of the electromagnetic valve 227 located at the bottom is connected to the air frame 229 fixed on the upper surface of the mold through a pipeline. The air inlet interface is connected to the air supply interface, and air is supplied to the C-shaped air duct 2292 opened inside the air rack 229. The upper surface of the air rack 229 is provided with a core shooting port 2291 corresponding to the sand shooting nozzle of the sand shooting component on the path of the air duct 2292, and when the core is not shot, the swing pipe 2116 is directly above the core shooting port 2291, the cleaning head 2117 is softly plugged into the sand shooting nozzle, and the wind wheel 2119 is inside the core shooting port 2291. The air rack 229 is fixedly connected with a conduit at the end of the air duct 2292, and one end of the conduit is fixedly connected to the side of the air guide pipe 228 and close to one end of the mold.

[0024] During operation, the tooth plate 211 moves up to compress the reset spring 212 and push the push rod 2111. The push rod 2111 pushes the tooth bar 2113. The tooth bar 2113 drives the driving gear 2114, which drives the bevel gear box 2115 and the swing tube 2116 to rotate until the sand shooting operation is not affected. The mold is closed, and the tooth plate 211 moves down to release the push of the push rod 2111. The push rod 2111 and the tooth bar 2113 move down and reset under the action of the spring. The swing tube 2116 also resets and adheres to the sand shooting nozzle. The core machine 1 shoots sand, and the sand shooting nozzle is reset when the mold is opened. The swing pipe 2116 moves to the bottom of the sand shooting nozzle again and resets. The mold moves down and separates. The inclined lifting rod 2142 pushes the upper lifting block 214 to retract and reset. The lower solenoid valve 227 is opened, and the gas in the gas storage tank 226 blows away the molding sand at the core shooting port 2291. At the same time, it drives related components to clean the sand shooting nozzle. The cleaned molding sand is processed by the conduit, etc. The lower solenoid valve 227 is closed. When shooting the core again, the upper solenoid valve 227 is opened to blow the molding sand into the core shooting space of the mold.

[0025] To sum up, through the arrangement of the slide rail 21, the tooth plate 211, the push rod 2111, the limiting baffle 2112, the gear rod 2113, the driving gear 2114, the bevel gear box 2115, the swing pipe 2116, the cleaning head 2117, the roller 2118, the wind wheel 2119, the air storage tank 226, the solenoid valve 227, the air guide pipe 228, the check valve 2281, the air rack 229, the core shooting port 2291 and the air duct 2292, after the core shooting operation is completed, through the resetting and coordinated work of a series of components, the sand shooting nozzle and the surrounding area can be completely cleaned, which can not only remove the residual molding sand, but also recycle the cleaned molding sand, thereby avoiding the waste of molding sand and reducing the production cost.

[0026] Working principle: When working, start the core shooter 1 to push the mold to close the mold. During the mold closing process, the mold moving upward will lift the upper lifting block 214 through the inclined lifting rod 2142, and thereby synchronously drive the toothed plate 211 connected to the upper lifting block 214 to move upward in a straight line along the slide rail 21. During the upward movement, the toothed plate 211 will compress the return spring 212 and approach the push rod 2111 until the toothed plate 211 and the lower end of the push rod 2111 are docked, and then the toothed plate 211 will push the push rod 2111 to move upward along the limiting baffle 2112, and when the push rod 2111 moves upward, it will push the toothed rod 2113 to move upward, and the upwardly moved toothed rod 2113 will mesh and drive the driving gear 2114, and then the rotating driving gear 2114 The bevel gear inside the bevel gear box 2115 will be driven to rotate coaxially, and the swing tube 2116 will be driven to rotate through the bevel gear until the swing tube 2116 is removed from the core shooting port 2291 and the lower end of the sand shooting nozzle without affecting the sand shooting operation of the sand shooting component. Then the sand shooting component will quickly push the sand shooting nozzle down to seal and dock with the core shooting port 2291 on the mold surface. At this time, the molds are closed, and the swing tube 2116 also stops rotating and deviating. At the same time, the upper inclined surface of the upper lifting block 214 is docked with the lower inclined surface of the retracting rod 213, and the upper lifting block 214 is pressed to compress the spring rod 2141 to retract into the tooth plate 211. As the upper lifting block 214 retracts, the inclined lifting rod 2142 will no longer be able to support the upper lifting block 214, and then the tooth plate 211 will be reset Under the action of spring 212, it quickly moves down and resets along slide rail 21, and during the downward movement of toothed plate 211, it will mesh and drive the air extraction ratchet gear 2241, and the rotating air extraction ratchet gear 2241 will coaxially drive the reciprocating screw rod 224 to rotate, and the rotating reciprocating screw rod 224 will drive the reciprocating slider 223 to move back and forth along the slide box 225 in a straight line, and the reciprocating reciprocating slider 223 will drive the piston rod 222 to move back and forth along the wall of the air extraction pipe 22, and during the movement, the core shooting space inside the mold is evacuated. Specifically, when the piston rod 222 moves to the left, the space between the second one-way valve 2221 end of the piston rod 222 and the air extraction pipe 22 increases. Since no other substances or gas are introduced into this space to supplement, negative pressure will occur. The high-pressure environment will then force the first one-way valve 221 at the end of the exhaust pipe 22 to open, and the gas inside the core shooting space will be extracted and introduced into the exhaust pipe 22. When the piston rod 222 moves to the right, the gas introduced into the exhaust pipe 22 will be squeezed. As the pressure increases, the second one-way valve 2221 set at the end of the piston rod 222 will be forced to open. Then the gas will enter the interior of the piston rod 222 through the second one-way valve 2221, and enter the left end space of the exhaust pipe 22 through the piston rod 222. This process will continue to be executed when the tooth plate 211 drives the exhaust ratchet gear 2241. The gas entering the left end of the exhaust pipe 22 will continue to enter the interior of the gas storage tank 226 along the pipeline and compress the gas pressure spring 2261.Until the tooth plate 211 and the return spring 212 are reset to the initial state, the rotation drive of the air extraction ratchet gear 2241 is released. At the same time, the downward movement of the tooth plate 211 will release the pushing state of the push rod 2111, and then the push rod 2111 and the tooth bar 2113 will move downward under the action of the spring. When moving downward, the tooth bar 2113 will reversely mesh and drive the driving gear 2114, and then the driving gear 2114 will reversely drive the swing tube 2116 to rotate and reset through the bevel gear box 2115, and then the swing tube 2116 will softly contact the sand shooting nozzle of the sand shooting component and temporarily adhere to the tube side of the sand shooting nozzle, and then the core shooting machine 1 will control the sand shooting component to move towards the mold. Internal sand shooting, when the sand shooting is completed and the mold can be opened after the specified time of standing, the core shooting machine 1 will control the sand shooting nozzle of the sand shooting component to move up and reset. When the sand shooting nozzle is reset to the initial position, the swing tube 2116 will drive the cleaning head 2117 to move down along the sand shooting mouth of the sand shooting nozzle under the action of the spring, the gear rod 2113, the driving gear 2114 and the bevel gear box 2115, and move it to the bottom of the sand shooting nozzle again, and move it up and reset after moving to the sand shooting nozzle. Then the core shooting machine 1 will control the mold to move down and separate. When the mold moves down, it will synchronously drive the inclined lifting rod 2142 to move down. When the mold moves down to the initial position, the inclined lifting rod 2142 will be with the upper lifting block 214 After the lifting block 214 is retracted, the inclined lifting rod 2142 passes through the lifting block 214 to the bottom of the lifting block 214, and is reset to the lifting state of the lifting block 214. Then the electromagnetic valve 227 located below is opened, and the gas in the gas storage tank 226 is input into the air channel 2292, so that the gas blows the molding sand scattered at the core shooting port 2291 into the conduit, and falls into the air guide pipe 228 along the conduit. At the same time, the airflow drives the wind wheel 2119 to rotate, and the rotating wind wheel 2119 drives the roller 2118 and the cleaning head 2117 to rotate, wherein the cleaning head 211 7 will clean the sand shooting nozzle, clean the molding sand stuck to the sand shooting nozzle, and the cleaned molding sand will fall into the inside of the swing tube 2116, and be crushed by the rotating roller 2118. After being crushed, it will fall into the core shooting port 2291 and enter the inside of the conduit under the blowing of the air flow, and then the electromagnetic valve 227 located below will be closed. When the core shooting is performed again, the electromagnetic valve 227 located above will be opened, and the gas will be used to blow the molding sand inside the air guide tube 228 into the core shooting space of the mold (because the amount of retained molding sand is small, only a small air flow is blown in, which will not affect the sand shooting operation of the sand shooting parts). This is the whole process of using the production device.

[0027] It should be noted that the specifications and dimensions of the tooth plate 211, the reciprocating screw 224, the air extraction ratchet gear 2241, and the air storage tank 226 are set according to actual conditions, which can ensure that the core shooting space of the mold presents a specified pressure environment and complete the specified sand blowing operation. When the airflow is insufficient, it can be connected to the high-pressure equipment of the core shooting machine 1 through a pipeline as needed; a rubber pad or other buffer structure is set at the position where the side of the swing pipe 2116 contacts the sand shooting head for buffering and isolation; the airway 2292 has a certain depth. When the gas blows the molding sand, the molding sand will move along the inner wall of the airway 2292 and will not rise; the roller 2118 is set hollow.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A supercharger bearing housing uncoated sand shell sand core production device, comprising: The core shooting machine (1) is a device used in the foundry industry, the core components of which include a column component, a sand shooting component, a mold frame component and a base, and are characterized in that: A negative pressure structure (2) is arranged on one side of the mold frame component and is intermittently connected to the interior of the mold frame component; The negative pressure structure (2) comprises a slide rail (21), a tooth plate (211) is slidably arranged inside the slide rail (21), and a return spring (212) is fixedly connected to the upper end of the tooth plate (211), and the upper end of the return spring (212) is fixed to a limiting baffle (2112) integrally arranged above the inside of the slide rail (21), a pair of push rods (2111) are inserted above the inside of the return spring (212), and the upper end of the push rods (2111) is fixed to the tooth rod (2113) through the limiting baffle (2112), the side surface of the tooth rod (2113) is meshed with the driving gear (2114) for transmission, and the rotating shaft of the driving gear (2114) is connected to the inside of the bevel gear box (2115) through a coupling. The bevel gear box (2115) is connected to the rotating shaft of one of the bevel gears, and the axles of the two bevel gears located inside the bevel gear box (2115) are respectively fixed to the swing tube (2116) through connecting rods. A roller (2118) is rotatably arranged inside the swing tube (2116), and the upper and lower ends of the roller (2118) are respectively fixed to the cleaning head (2117) and the wind wheel (2119). The tooth plate (211) is provided with a lifting block (214) in a sliding manner through a spring rod (2141). The side surface of the lower mold of the mold frame component is fixedly provided with an inclined lifting rod (2142) for lifting the lifting block (214) according to the position of the lifting block (214). The surface of the slide rail (21) is connected to the upper part of the lifting block (214) by bolts. A retracting rod (213) is provided, the side meshing transmission of the tooth plate (211) is provided with an air extraction ratchet gear (2241), and the wheel axle of the air extraction ratchet gear (2241) is fixed to a reciprocating screw (224) rotatably arranged inside a slide box (225), a reciprocating slider (223) is provided on the rod body of the reciprocating screw (224) for reciprocating transmission, and the reciprocating slider (223) is slidably limited and arranged inside the slide box (225), the front and rear sides of the reciprocating slider (223) are fixed to a piston rod (222) slidably arranged inside an air extraction pipe (22) through a connecting rod, the air extraction pipe (22) is integrally connected and arranged on the front and rear sides of the slide box (225), and the axial position of the piston rod (222) inside the air extraction pipe (22) is opened. A through hole is provided, and a second one-way valve (2221) is arranged inside the through hole at one end close to the air inlet. The side of the air extraction pipe (22) is fixedly connected to the air storage tank (226) through a pipeline. Solenoid valves (227) for controlling air discharge are arranged above and below the side of the air storage tank (226) at positions close to the air extraction pipe (22). The output interface of the solenoid valve (227) located at the top is fixedly connected to an air guide pipe (228), and one end of the air guide pipe (228) is connected to the space of the mold core, and a check valve (2281) is arranged at the connecting end. The output interface of the solenoid valve (227) located at the bottom is connected to the air inlet interface of the air rack (229) fixed on the upper surface of the mold through a pipeline.The air rack (229) is fixedly connected with a conduit at the end of the airway (2292), and one end of the conduit is fixedly connected with the side of the air guide pipe (228) and close to one end of the mold.

2. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1 is characterized in that: The slide rail (21) is a rail structure with a T-shaped groove inside, and the upper end is fixed to the upper part of the mold frame component by bolts, and is located near the middle of the left side of the mold.

3. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1 is characterized in that: The limiting baffles (2112) are provided with two upper and lower ones, and there is a specified spacing distance between the two limiting baffles (2112).

4. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1 is characterized in that: The interior of the gear rod (2113) is hollow, and the upper end is moved and limited and reset by a spring and a limiting baffle (2112) located above. The driving gear (2114) is rotatably arranged in a bearing frame fixedly arranged on the surface of the slide rail (21).

5. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1 is characterized in that: The bevel gear box (2115) is fixed to the upper part of the mold frame component by bolts, and has at least three sets of meshing bevel gears inside.

6. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1, characterized in that: The cleaning head (2117) is a two-layer conical structure, and the two layers are movably connected in a lifting manner via a retractable spring structure. The cleaning head (2117) and the wind wheel (2119) are both within the coverage range of the upper and lower end pipe openings of the swing pipe (2116).

7. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1, characterized in that: One end of the upper lifting block (214) passing through the tooth plate (211) is provided with an inclined surface inclined from top to bottom and from left to right, and the angles of the inclined surfaces of the inclined lifting rod (2142) and the retracting rod (213) are the same as those of the upper lifting block (214).

8. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1, characterized in that: One end of the air extraction pipe (22) is fixed to the side of the mold and communicates with the core-shooting space of the mold, and a first one-way valve (221) is arranged at the end communicating with the core-shooting space. A compressible gas pressure spring (2261) is arranged inside the gas storage tank (226) from the position communicating with the air extraction pipe (22) to the other end.

9. The device for producing the sand core of the uncoated sand shell of the supercharger bearing housing according to claim 1, characterized in that: The upper surface of the air frame (229) is provided with a core shooting opening (2291) corresponding to the sand shooting nozzle of the sand shooting component on the path of the air channel (2292), and when no core is shot, the swing pipe (2116) is located directly above the core shooting opening (2291), the cleaning head (2117) is softly plugged into the sand shooting nozzle, and the wind wheel (2119) is located inside the core shooting opening (2291).

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