An automatic feeding core making machine for casting

Abstract

The application discloses a core making machine with automatic feeding for casting and relates to the technical field of core making machine feeding devices. The core making machine with automatic feeding for casting comprises upper support bodies, a plurality of upper support bodies are arranged, a lower discharging device is arranged between two adjacent upper support bodies, a centralized feeding device is arranged on the top of the lower discharging device and located on both sides of the upper support body, and a belt feeding, sweeping and cleaning device is arranged in the centralized feeding device and extends to the outside. In the application, while the centralized and unified sand core conveying operation is realized, the adhered sand core on the belt of the conveying device can be effectively avoided, on the one hand, the "fine cleaning" can be realized, the residual sand core material on the belt is obviously reduced, on the other hand, the problem of return belt material is reduced, the problem of belt abrasion is greatly reduced, and the safety of the sand core conveying is higher.

Description

Technical Field

[0001] This invention relates to the field of feeding devices for core-making machines, specifically to an automatic feeding core-making machine for casting. Background Technology

[0002] Core-making machines are a general term encompassing core shooters and shell core machines, primarily used in the foundry machinery industry to produce coated sand shell cores using hot or cold box processes. During core-making operations, the machine requires automatic feeding to improve production efficiency.

[0003] Traditional core-making machine feeding methods mainly include three types: gravity type (top hopper), pneumatic conveying type, and mechanical type (screw / belt). Among them, mechanical type (screw / belt feeding) has the advantages of quantitative feeding and strong adaptability to sand cores (suitable for viscous or poorly flowing sand), and is the most widely used.

[0004] A current patent application (CN218693621U) discloses a magnetic separation belt device for gray iron sand in foundry return sand. The device includes a conveying system comprising a conveyor belt, a driving roller, and a driven roller. The outer walls of both the driving and driven rollers are connected to the same conveyor belt. Support blocks are rotatably connected to both ends of the driving and driven rollers. A baffle plate is fixedly connected to one side of the outer wall of each support block. One end of both the driving and driven rollers passes through one side of the baffle plate. This invention, by utilizing the impact of the sand core against the inner wall of the feeding device, ensures that the sand core falls evenly and at a constant speed onto the conveying device, solving the problem of reduced separation effect and work efficiency due to excessively thick accumulation and difficulty in leveling.

[0005] However, the feeding device of this core-making machine has the following defects in actual use:

[0006] In existing core-making machine feeding devices, when conveying casting sand cores via a belt conveyor, a scraping structure is typically installed on the belt conveyor to continuously clean the belt section to prevent some sticky sand cores from adhering to the belt. However, in actual operation, this solution often suffers from problems. Resin, binder, or fine powder often remains on the surface of the sand cores, and the scraping structure alone is insufficient to remove the tiny particles adhering to the pits or gaps on the belt surface, leading to the formation of hardened lumps over time. Furthermore, static electricity is easily generated during sand core conveying, causing fine dust to firmly adhere to the belt surface. The scraping structure cannot eliminate this static electricity, and the residual dust will contaminate subsequent sand cores.

[0007] Unlike ordinary ores, sand cores contain binders such as resin, which naturally absorb moisture from the air, and their strength decreases over time. If sand cores are haphazardly stacked or simply transported in the workshop, it's easy for earlier-produced cores to be buried at the bottom, while later-produced cores are used first, creating a chaotic situation that makes precise quality control difficult. Summary of the Invention

[0008] The purpose of this invention is to provide an automatic feeding core-making machine for casting, so as to solve the problems mentioned in the background art.

[0009] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0010] This invention provides an automatic feeding core-making machine for casting, comprising: an upper support body, wherein multiple upper support bodies are provided, and a lower unloading device is provided between two adjacent upper support bodies; a centralized feeding device installed inside the upper support bodies and located on both sides of the top of the lower unloading device; and a belt feeding and cleaning device installed inside the centralized feeding device and extending to the outside.

[0011] The belt conveyor scraping and cleaning device includes: a belt conveyor installed inside the centralized feeding device; a helical gear structure connected to one side of the shaft end of the belt conveyor, the helical gear structure extending into the interior of the centralized feeding device; a reciprocating screw connected to the other side of the shaft end of the belt conveyor; a belt scraping and cleaning structure connected to the reciprocating screw via ball bearings and installed on the side of the belt conveyor outlet; and a gas-pressurized impurity removal structure connected to the belt scraping and cleaning structure, the gas-pressurized impurity removal structure being installed on the side of the centralized feeding device and cleaning the sand core at the connection between the belt scraping and cleaning structure and the belt conveyor.

[0012] The reciprocating screw is movably positioned between the two belt conveyors, and the two belt conveyors operate synchronously through the reciprocating screw. The belt conveyors are matched with the specifications of the centralized feeding device.

[0013] As a preferred embodiment of the present invention, the unloading device includes:

[0014] An intermediate unloading frame is provided, which is disposed between the two upper support bodies. An unloading chamber is installed inside the intermediate unloading frame, and a longitudinal baffle is installed at the discharge port at the bottom of the unloading chamber.

[0015] The unloading belt conveyor is installed inside the intermediate unloading frame and is located at the bottom of the longitudinal baffle. The unloading belt conveyor transports the sand core to the mold of the core making machine.

[0016] As a preferred embodiment of the present invention, the centralized feeding device includes:

[0017] A storage chamber is installed inside the upper support body. The storage chamber is cone-shaped, and a central baffle is installed at the discharge port at the bottom of the storage chamber.

[0018] The side cover is installed on the side of the central baffle by screws. A belt conveyor is provided at the bottom of the central baffle, and a helical gear structure is installed inside the central baffle.

[0019] As a preferred embodiment of the present invention, the helical gear structure includes:

[0020] A synchronous belt is provided, which is connected to a shaft end on one side of the belt conveyor via synchronous pulleys. A longitudinal shaft is connected to the inner side of the synchronous belt via synchronous pulleys, and the longitudinal shaft is rotatably connected to the side of a side support.

[0021] The side bracket is installed on the side of the central baffle;

[0022] A first bevel gear is connected to the longitudinal shaft, and a second bevel gear is meshed with the side of the first bevel gear. Both the first bevel gear and the second bevel gear are rotatably connected to the side of the side bracket.

[0023] A horizontal shaft is connected to the second bevel gear, and the horizontal shaft is rotatably connected to the side of the central baffle.

[0024] In a preferred embodiment of the present invention, a first gear is rotatably connected to the side of the concentrating baffle on the outer side of the horizontal shaft, and second gears are meshed on the left and right sides of the first gear, the second gears being rotatably connected to the side of the concentrating baffle.

[0025] The second gear is connected to a spiral feeding roller on its side, and the spiral feeding roller is movably arranged on the left and right sides inside the central baffle.

[0026] As a preferred embodiment of the present invention, a connecting rod is installed at the bottom of the spiral feeding roller, the connecting rod is rotatably connected to the inner side of the side cover, a bevel gear set is installed on the outer side of the connecting rod, the bevel gear set is movably disposed on the inner side of the side cover, and an exhaust blade is connected to the shaft end of another gear inside the bevel gear set, the exhaust blade is movably disposed at the bottom of the side cover.

[0027] As a preferred embodiment of the present invention, the belt sweeping cleaning structure includes:

[0028] A lead screw and slider are connected to the outside of the reciprocating lead screw via ball bearings. A linear rod is mounted on the side of the lead screw and slider, and a tapered baffle is fixed to the outside of the linear rod.

[0029] An outer scraper is connected to the conical baffle and slidably connected to the side of the inner scraper. The inner scraper is installed against the outside of the conveyor belt outlet and scrapes away the sand cores adhering to the surface of the conveyor belt.

[0030] The straight rod is equipped with a gas-pressing impurity removal structure located outside the conical baffle.

[0031] As a preferred embodiment of the present invention, the top of the outer scraper is provided with a conical groove, and multiple conical grooves are provided. A discharge chute is provided on the side of the conical groove away from the inner scraper. The discharge chute is connected to the conical groove and is used to unload the conveyed sand core.

[0032] As a preferred embodiment of the present invention, the gas impurity removal structure includes:

[0033] A connecting arm is connected to the outside of the straight rod and located outside the tapered baffle. A stamping rod is fixed to the outside of the connecting arm by a nut.

[0034] A gas cylinder is mounted on the left and right sides of the side cover. A gas piston is slidably connected inside the gas cylinder, and the gas piston is connected to the stamping rod.

[0035] The gas tank has a gas inlet on one side of its top and a valve on the other side of its bottom. A high-pressure exhaust nozzle is connected to the side of the valve and is located on the side of the outer and inner scrapers.

[0036] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0037] 1. In a core-making machine with automatic feeding for casting, the driving force generated by the operation of the belt conveyor enables the operation of a scraper (mechanical scraping) and a gas jet (air purging) to clean the belt conveyor. Mechanical scraping effectively removes most of the coarse particles, wet material, or agglomerated material adhering to the belt conveyor. Air jetting removes fine powder, wet film, or residue embedded in the texture that is difficult to remove by mechanical scraping, achieving a high degree of cleanliness on the belt surface. Simultaneously, the introduction of air jetting can appropriately reduce the pressure of mechanical scraping, relying on airflow to blow away fine sand core material, thereby extending the service life of the belt conveyor. Furthermore, the conical groove and discharge chute on the top of the outer scraper of the mechanical scraper can, on the one hand, cut off the continuous contact surface between the sand core and the scraper side, reducing the adsorption and accumulation of sand core (especially wet or sticky materials) on the side, preventing the formation of stubborn agglomerates; on the other hand, the structure provides a guiding effect, causing the scraped sand core to be discharged in a concentrated manner along the conical surface, avoiding problems such as lateral diffusion, overflow, or jamming of the sand core on the scraper side.

[0038] It should be noted that the design of the conical groove and discharge chute can retain a small amount of air or fine sand cores, forming a "rolling / sliding mixture" interface. This helps to clean the sand cores in the conical groove and discharge chute, preventing blockage and hardening while reducing the coefficient of friction and creating air lubrication to ensure the safety of sand core transportation. It also reduces stress concentration on the scraper side caused by thermal expansion and contraction or bending, preventing cracking.

[0039] 2. In the automatic feeding core-making machine for casting, when the belt conveyor is operating, it can also drive the spiral feeding roller set on the top of the belt conveyor to rotate continuously, pushing the sand core to move smoothly within the semi-enclosed centralized baffle. This greatly reduces the squeezing and friction between sand cores and between the sand cores and the equipment, effectively protecting the integrity of the sand cores. Simultaneously, the spiral feeding roller effectively prevents powder or debris from being generated during the sand core conveying process, fundamentally preventing equipment stoppages due to material blockage and ensuring continuous operation of the production line. Furthermore, it can precisely adjust the sand core conveying volume, ensuring a stable auxiliary material addition ratio. This not only ensures a stable structure and prevents sand from scattering during sand core casting but also improves the surface finish of the castings.

[0040] 3. In the core-making machine with automatic feeding for casting, an automated three-dimensional warehouse system consisting of multiple silos and belt conveyors is adopted to enforce a "first-in, first-out" (FIFO) model. The system precisely records the conveying time of each sand core, ensuring that the earliest sand core entering the warehouse is always the first to be sent to the next process. This fundamentally eliminates the risk of defects such as porosity and sand holes in castings due to overdue storage of sand cores. Simultaneously, the three-dimensional warehouse facilitates buffering and allocation, completely freeing up ground space, making the workshop layout more streamlined and tidy, and enabling intelligent and flexible scheduling of sand cores. Attached Figure Description

[0041] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 This is a top view of the overall structure of the invention;

[0045] Figure 3 This is a schematic diagram of the overall front view of the present invention;

[0046] Figure 4 This is a schematic diagram of the unloading device of the present invention;

[0047] Figure 5 This is a schematic diagram of the connection between the support body and the centralized feeding device of the present invention;

[0048] Figure 6 This is a schematic diagram of the connection between the centralized feeding device and the belt feeding sweeping and cleaning device of the present invention;

[0049] Figure 7 This is the present invention. Figure 6 Enlarged structural diagram of region A in the middle;

[0050] Figure 8 This is a schematic diagram of the connection between the storage compartment and the helical gear structure of the present invention;

[0051] Figure 9 This is a schematic diagram of a partial connection between the storage bin and the belt-feeding sweeping and cleaning device of the present invention;

[0052] Figure 10 This is a schematic diagram of the connection between the helical gear structure and the gas impurity removal structure of the present invention;

[0053] Figure 11 This is a schematic diagram of the helical gear structure of the present invention;

[0054] Figure 12This is a schematic diagram of the connection between the reciprocating lead screw and the gas-pressed impurity removal structure of the present invention;

[0055] Figure 13 This is the present invention. Figure 12 Schematic diagram of the structure viewed from the middle II-II' section;

[0056] Figure 14 This is an exploded view of the belt conveyor and inner scraper of the present invention after they are connected;

[0057] In the picture:

[0058] 10. Upper support structure;

[0059] 20. Lower unloading device; 201. Intermediate unloading frame; 202. Unloading bin; 203. Longitudinal baffle; 204. Unloading conveyor belt;

[0060] 30. Centralized feeding device; 301. Storage bin; 302. Centralized baffle; 303. Side cover;

[0061] 40. Belt-feeding sweeping and cleaning device; 401. Belt conveyor; 402. Helical gear structure; 403. Reciprocating screw; 404. Belt sweeping and cleaning structure; 405. Pneumatic impurity removal structure;

[0062] 4021. Synchronous belt; 4022. Longitudinal shaft; 4023. Side support; 4024. First bevel gear; 4025. Second bevel gear; 4026. Horizontal shaft; 40261. First gear; 40262. Second gear; 40263. Spiral feed roller; 402631. Connecting rod; 402632. Bevel gear set; 402633. Exhaust blades;

[0063] 4041, Screw slider; 4042, Linear rod; 4043, Conical baffle; 4044, Outer scraper; 40441, Conical groove; 40442, Discharge chute; 4045, Inner scraper;

[0064] 4051, Connecting arm; 4052, Stamping rod; 4053, Gas tank; 4054, Gas piston; 4055, Gas inlet; 4056, Valve; 4057, High-pressure exhaust nozzle. Detailed Implementation

[0065] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0066] Example 1

[0067] Please see Figures 1-14 An automatic feeding core-making machine for casting includes an upper support body 10, of which multiple upper support bodies 10 are provided, and a lower unloading device 20 is provided between two adjacent upper support bodies 10; a centralized feeding device 30 is installed inside the upper support body 10 and located on both sides of the top of the lower unloading device 20; and a belt feeding and cleaning device 40 is installed inside the centralized feeding device 30 and extends to the outside, the belt feeding and cleaning device 40 including: a belt conveyor 401 installed inside the centralized feeding device 30; a helical gear structure 402 connected to one side of the shaft end of the belt conveyor 401, the helical gear structure 402 extending into the interior of the centralized feeding device 30; and a helical gear structure 402 connected to the other side of the belt conveyor 401. A reciprocating screw 403 is connected to the side shaft end; a belt scraping and cleaning structure 404 is installed on the outside of the reciprocating screw 403 and mounted on the side of the discharge port of the belt conveyor 401 via ball bearings; a gas-pressed impurity removal structure 405 is connected to the belt scraping and cleaning structure 404 and is installed on the side of the centralized feeding device 30, and cleans the sand core at the connection between the belt scraping and cleaning structure 404 and the belt conveyor 401. The reciprocating screw 403 is movably arranged between the two belt conveyors 401, and the two belt conveyors 401 are operated synchronously through the reciprocating screw 403. The belt conveyors 401 are matched with the specifications of the centralized feeding device 30.

[0068] The working principle described above is as follows: When sand cores are transported to the core-making machine for processing, they are first uniformly stored inside each centralized feeding device 30. The sand cores are then uniformly transported to the unloading device 20 via a belt conveyor 401 located at the bottom of the centralized feeding device 30, achieving unified and centralized feeding of the sand cores. During the feeding process using the belt conveyor 401, the driving force generated by the belt conveyor 401 drives the spiral gear structure 402 to perform spiral feeding of the sand cores conveyed at the top of the belt conveyor 401. This ensures that the sand cores are transported stably and evenly at the top of the belt conveyor 401, and avoids the problem of sand cores piling up during transport. Meanwhile, when the belt conveyor 401 is in operation, it will also drive the reciprocating screw 403 to rotate, and drive the belt scraping and cleaning structure 404 connected to the reciprocating screw 403 to operate, so as to continuously and reciprocally scrape and clean the belt part of the belt conveyor 401, and prevent the sand core from adsorbing and sticking to the belt conveyor 401 (belt part).

[0069] When the belt sweeping cleaning structure 404 is in operation, it can drive the gas impingement removal structure 405 to operate. The compressed gas is sprayed at the connection between the belt sweeping cleaning structure 404 and the belt conveyor 401 to uniformly treat the sand cores that are adhered to the belt conveyor 401 and the belt sweeping cleaning structure 404.

[0070] It should be noted that when treating the sand core using a combination of mechanical scraping and gas jetting, the mechanical scraping effectively removes most of the coarse particles, wet materials, or clumps adhering to the belt; while the gas jetting removes fine powder, wet film, or residue embedded in the texture that is difficult for the scraper to handle. The combination of these two methods enables the belt surface to achieve a very high level of cleanliness.

[0071] For details, please refer to the following: Figure 4 The unloading device 20 includes an intermediate unloading frame 201, which is disposed between two upper support bodies 10. An unloading bin 202 is installed inside the intermediate unloading frame 201, and a longitudinal baffle 203 is installed at the discharge port at the bottom of the unloading bin 202. An unloading belt conveyor 204 is installed inside the intermediate unloading frame 201 and is located at the bottom of the longitudinal baffle 203. The unloading belt conveyor 204 transports the sand core to the mold of the core making machine.

[0072] In the automatic feeding core-making machine for casting of the present invention, the sand cores conveyed to the interior of the intermediate unloading frame 201 can be evenly conveyed to the interior of the unloading conveyor 204 through the internally installed weighing conduit structure, and then conveyed to the interior of the core-making machine by the unloading conveyor 204.

[0073] It should be noted that a belt feeding and cleaning device 40 is also provided inside the intermediate unloading frame 201 and the unloading belt conveyor 204.

[0074] For details, please refer to the following: Figure 5 The centralized feeding device 30 includes a storage bin 301, which is installed inside the upper support body 10. The storage bin 301 is cone-shaped, and a centralized baffle 302 is installed at the discharge port at the bottom of the storage bin 301. A side cover 303 is installed on the side of the centralized baffle 302 by screws. A belt conveyor 401 is provided at the bottom of the centralized baffle 302, and a helical gear structure 402 is installed inside the centralized baffle 302.

[0075] In the automatic feeding core-making machine for casting of the present invention, when feeding sand cores, the sand cores are stored in batches inside the storage bin 301, and the sand cores inside the storage bin 301 are conveyed to the belt conveyor 401 at the bottom. At this time, the design of the concentrating baffle 302 ensures that the sand cores are only conveyed at the top of the belt conveyor 401 and inside the concentrating baffle 302 during conveying, and problems such as sand cores falling or scattering will not occur.

[0076] For details, please refer to the following: Figure 10 and Figure 11 The helical gear structure 402 includes a synchronous belt 4021, which is connected to the shaft end of one side of the belt conveyor 401 via a synchronous pulley. A longitudinal shaft 4022 is connected to the inner side of the synchronous belt 4021 via the synchronous pulley. The longitudinal shaft 4022 is rotatably connected to the side of the side support 4023, which is mounted on the side of the central baffle 302. A first bevel gear 4024 is connected to the longitudinal shaft 4022. A second bevel gear 4025 is meshed with the side of the first bevel gear 4024. Both the first bevel gear 4024 and the second bevel gear 4025 are rotatably connected to the side of the side support 4023. A horizontal shaft 4026 is connected to the second bevel gear 4025 and is rotatably connected to the side of the central baffle 302.

[0077] In this design, a first gear 40261 is rotatably connected to the side of the central baffle 302 on the outer side of the horizontal shaft 4026. A second gear 40262 is meshed with the left and right sides of the first gear 40261. The second gear 40262 is rotatably connected to the side of the central baffle 302. A spiral feeding roller 40263 is connected to the side of the second gear 40262. The spiral feeding roller 40263 is movably arranged on the left and right sides inside the central baffle 302.

[0078] In the core-making machine for casting of the present invention, when the belt conveyor 401 is operating, it drives the synchronous belt 4021, which is connected to the shaft end of the belt conveyor 401 via a synchronous pulley, to operate. This causes the longitudinal shaft 4022, connected to the synchronous pulley on the inner side of the synchronous belt 4021, to rotate, thereby causing the first bevel gear 4024 connected to the longitudinal shaft 4022 to rotate. When the first bevel gear 4024 rotates, it drives the second bevel gear 4025, which is meshed with the first bevel gear 4024, to rotate, thereby causing the first gear 40261 connected to the second bevel gear 4025 to rotate.

[0079] When the first gear 40261 rotates, the two second gears 40262 meshing on its left and right sides rotate synchronously and in the same direction, driving the spiral feed roller 40263 connected to the second gears 40262 to rotate as well. At this time, the design of the spiral feed roller 40263 allows the sand core to move smoothly within the semi-enclosed centralized baffle 302, greatly reducing the squeezing and friction between materials and between materials and equipment, thus effectively protecting the integrity of the sand core. Furthermore, the sand core conveying rate can be precisely adjusted to ensure a stable auxiliary material addition ratio. This not only ensures a stable structure and prevents sand from scattering during sand core casting but also improves the surface finish of the casting.

[0080] For details, please refer to the following: Figure 11 A connecting rod 402631 is installed at the bottom of the spiral feed roller 40263. The connecting rod 402631 is rotatably connected to the inner side of the side cover 303. A bevel gear set 402632 is installed on the outer side of the connecting rod 402631. The bevel gear set 402632 is movably disposed on the inner side of the side cover 303. The shaft end of another gear inside the bevel gear set 402632 is connected to an exhaust blade 402633. The exhaust blade 402633 is movably disposed at the bottom of the side cover 303.

[0081] In the automatic feeding core-making machine for casting of the present invention, when the spiral feed roller 40263 rotates, it drives the connecting rod 402631 connected to the bottom of the spiral feed roller 40263 to rotate, which in turn drives the bevel gear set 402632 mounted on the outside of the connecting rod 402631 to operate. At this time, through the meshing connection of the two gears inside the bevel gear set 402632, the exhaust blade 402633 connected to the bevel gear set 402632 is driven to rotate, generating a downward airflow that acts on the sand core, cleaning the sand core that is adhered to and adsorbed on the belt conveyor 401.

[0082] For details, please refer to the following: Figure 12 and Figure 13The belt sweeping cleaning structure 404 includes a lead screw slider 4041, which is connected to the outside of the reciprocating lead screw 403 via ball bearings. A linear rod 4042 is installed on the side of the lead screw slider 4041, and a conical baffle 4043 is fixedly installed on the outside of the linear rod 4042. An outer scraper 4044 is connected to the conical baffle 4043 and is slidably connected to the side of an inner scraper 4045. The inner scraper 4045 is installed and abuts against the outside of the outlet of the belt conveyor 401, and performs scraping treatment on the sand cores adhering to the surface of the belt conveyor 401. A gas-pressed impurity removal structure 405 is installed on the outside of the linear rod 4042, located outside the conical baffle 4043.

[0083] In this scheme, a conical groove 40441 is provided on the top of the outer scraper 4044. Multiple conical grooves 40441 are provided. A discharge chute 40442 is provided on the side of the conical groove 40441 away from the inner scraper 4045. The discharge chute 40442 is connected to the conical groove 40441 and is used to unload the conveyed sand core.

[0084] In the core-making machine for casting of the present invention, when the belt conveyor 401 is in operation, it drives the reciprocating screw 403 connected to its shaft end to rotate, which drives the screw slider 4041 connected to the outside of the reciprocating screw 403 by ball bearings to move horizontally, which drives the linear rod 4042 and the conical baffle 4043 connected to the screw slider 4041 to operate, and drives the outer scraper 4044 connected to the conical baffle 4043 to slide inside the inner scraper 4045, so that the outer scraper 4044 can clean the sand cores that are adhered to and adsorbed on the belt conveyor 401.

[0085] It should be noted that by creating a conical groove 40441 and a discharge chute 40442 on the top of the outer scraper 4044, the continuous contact surface between the sand core and the side of the outer scraper 4044 can be cut off, reducing the adsorption and accumulation of sand cores (especially wet or sticky materials) on the side and preventing the formation of stubborn clumps. At the same time, it can also provide a guiding effect, causing the scraped sand cores to be discharged in a concentrated manner along the conical direction of the conical groove 40441 and the discharge chute 40442, avoiding the problem of sand cores spreading laterally, overflowing, or getting stuck in the edge gaps of the outer scraper 4044.

[0086] For details, please refer to the following: Figure 12 and Figure 13The gas impurity removal structure 405 includes a connecting arm 4051, which is connected to the outside of the straight rod 4042 and located outside the conical baffle 4043. A stamping rod 4052 is fixed to the outside of the connecting arm 4051 by a nut. A gas tank 4053 is installed on the left and right sides of the side cover 303. A gas piston 4054 is slidably connected inside the gas tank 4053. The gas piston 4054 is connected to the stamping rod 4052. A gas inlet 4055 is installed on one side of the top of the gas tank 4053, and a valve 4056 is installed on the other side of the bottom of the gas tank 4053. A high-pressure exhaust nozzle 4057 is connected to the side of the valve 4056. The high-pressure exhaust nozzle 4057 is located on the side of the outer scraper 4044 and the inner scraper 4045.

[0087] In the core-making machine for casting of the present invention, when the linear rod 4042 operates horizontally (reciprocating), it drives the connecting arm 4051 and the stamping rod 4052 mounted on the outside of the linear rod 4042 to reciprocate horizontally, which in turn drives the gas piston 4054 connected to the stamping rod 4052 to reciprocate inside the gas tank 4053, pressurizing the gas filled into the side of the gas piston 4054 so that the gas can be ejected through the valve 4056 and the high-pressure exhaust nozzle 4057 to perform gas jet cleaning treatment on the sand core.

[0088] It should be noted that the gas used to impact the sand core can be delivered to the interior of the gas tank 4053 through the gas inlet 4055.

[0089] Example 2

[0090] For details, please refer to the following: Figure 7 During the conveying of sand cores via belt conveyor 401, the belt conveyor inside 401 drives the sand cores at the top to move. At this time, bearing components are installed on the port portions of the conveyor rollers connected to the belt conveyor inside 401, and the bearing components are slidably connected to the left and right sides of the frame of belt conveyor 401. The threaded shaft portions of the bearing components are fixedly connected to the sides and are fixed to the left and right sides of the frame of belt conveyor 401 by nuts.

[0091] When the belt section of the belt conveyor 401 shifts or becomes loose, the position of the conveyor roller connected to the belt section inside the belt conveyor 401 can be changed by moving the bearing component to the frame section of the belt conveyor 401, thereby preventing the belt section of the belt conveyor 401 from shifting or becoming loose.

[0092] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0093] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0094] Therefore, any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, should be covered within the protection scope of this invention.

Claims

1. A core-making machine with automatic feeding for casting, characterized in that, include: The upper support body (10) is provided in multiple ways, and a lower unloading device (20) is provided between two adjacent upper support bodies (10); a centralized feeding device (30) is installed inside the upper support body (10) and located on both sides of the top of the lower unloading device (20); and a belt feeding sweeping and cleaning device (40) is installed inside the centralized feeding device (30) and extends to the outside. The belt feeding and scraping cleaning device (40) includes: a belt conveyor (401) installed inside the centralized feeding device (30); a helical gear structure (402) connected to one side of the shaft end of the belt conveyor (401), the helical gear structure (402) extending into the interior of the centralized feeding device (30); a reciprocating screw (403) connected to the other side of the shaft end of the belt conveyor (401); a belt scraping cleaning structure (404) connected to the outside of the reciprocating screw (403) and installed on one side of the outlet of the belt conveyor (401) via ball bearings; and a gas-pressed impurity removal structure (405) connected to the belt scraping cleaning structure (404), the gas-pressed impurity removal structure (405) being installed on the side of the centralized feeding device (30) and cleaning the sand core at the connection between the belt scraping cleaning structure (404) and the belt conveyor (401). The reciprocating screw (403) is movably disposed between the two belt conveyors (401), and the two belt conveyors (401) are operated synchronously through the reciprocating screw (403). The belt conveyors (401) are matched with the specifications of the centralized feeding device (30).

2. The core-making machine for casting with automatic feeding according to claim 1, characterized in that: The unloading device (20) includes: An intermediate unloading frame (201) is disposed between two upper support bodies (10). An unloading bin (202) is installed inside the intermediate unloading frame (201). A longitudinal baffle (203) is installed at the discharge port at the bottom of the unloading bin (202). The unloading belt conveyor (204) is installed inside the intermediate unloading frame (201) and is located at the bottom of the longitudinal baffle (203). The unloading belt conveyor (204) transports the sand core to the mold of the core making machine.

3. The core-making machine for casting with automatic feeding according to claim 1, characterized in that: The centralized feeding device (30) includes: Storage chamber (301), the storage chamber (301) is installed inside the upper support body (10), the storage chamber (301) is set in a cone shape, and a centralized baffle (302) is installed at the discharge port at the bottom of the storage chamber (301). Side cover (303) is installed on the side of the central baffle (302) by screws. A belt conveyor (401) is provided at the bottom of the central baffle (302). A helical gear structure (402) is installed inside the central baffle (302).

4. The core-making machine for casting with automatic feeding according to claim 3, characterized in that: The helical gear structure (402) includes: A synchronous belt (4021) is connected to the shaft end of one side of the belt conveyor (401) via a synchronous pulley. A longitudinal shaft (4022) is connected to the inner side of the synchronous belt (4021) via a synchronous pulley. The longitudinal shaft (4022) is rotatably connected to the side of the side support (4023). The side bracket (4023) is installed on the side of the central baffle (302); A first bevel gear (4024) is connected to the longitudinal shaft (4022). A second bevel gear (4025) is meshed with the side of the first bevel gear (4024). Both the first bevel gear (4024) and the second bevel gear (4025) are rotatably connected to the side of the side bracket (4023). A horizontal shaft (4026) is connected to the second bevel gear (4025), and the horizontal shaft (4026) is rotatably connected to the side of the central baffle (302).

5. A core-making machine for casting with automatic feeding according to claim 4, characterized in that: A first gear (40261) is rotatably connected to the side of the central baffle (302) on the outer side of the horizontal shaft (4026). Second gears (40262) are meshed with the left and right sides of the first gear (40261), and the second gears (40262) are rotatably connected to the side of the central baffle (302). The second gear (40262) is connected to a spiral feed roller (40263) on its side, and the spiral feed roller (40263) is movably arranged on the left and right sides inside the central baffle (302).

6. A core-making machine for casting with automatic feeding according to claim 5, characterized in that: A connecting rod (402631) is installed at the bottom of the spiral feed roller (40263). The connecting rod (402631) is rotatably connected to the inner side of the side cover (303). A bevel gear set (402632) is installed on the outer side of the connecting rod (402631). The bevel gear set (402632) is movably disposed on the inner side of the side cover (303). The shaft end of another gear inside the bevel gear set (402632) is connected to an exhaust blade (402633). The exhaust blade (402633) is movably disposed at the bottom of the side cover (303).

7. A core-making machine for casting with automatic feeding according to claim 1, characterized in that: The belt sweeping cleaning structure (404) includes: A lead screw slider (4041) is connected to the outside of the reciprocating lead screw (403) by ball bearings. A linear rod (4042) is installed on the side of the lead screw slider (4041), and a conical baffle (4043) is installed and fixed on the outside of the linear rod (4042). An outer scraper (4044) is connected to the conical baffle (4043). The outer scraper (4044) is slidably connected to the side of the inner scraper (4045). The inner scraper (4045) is installed and abuts against the outside of the discharge port of the belt conveyor (401), and performs scraping treatment on the sand cores adhering to the surface of the belt conveyor (401). Among them, the straight rod (4042) is equipped with a gas blasting impurity removal structure (405) located outside the conical baffle (4043).

8. A core-making machine for casting with automatic feeding according to claim 7, characterized in that: The top of the outer scraper (4044) is provided with a conical groove (40441), and multiple conical grooves (40441) are provided. A discharge chute (40442) is provided on the side of the conical groove (40441) away from the inner scraper (4045). The discharge chute (40442) is connected to the conical groove (40441) and is used to unload the conveyed sand core.

9. A core-making machine for casting with automatic feeding according to claim 7, characterized in that: The gas impurity removal structure (405) includes: Connecting arm (4051), the connecting arm (4051) is connected to the outside of the straight rod (4042) and located outside the conical baffle (4043), and a stamping rod (4052) is fixed to the outside of the connecting arm (4051) by a nut. A gas cylinder (4053) is installed on the left and right sides of the side cover (303). A gas piston (4054) is slidably connected inside the gas cylinder (4053). The gas piston (4054) is connected to the stamping rod (4052). The gas tank (4053) has a gas inlet (4055) installed on one side of its top, and a valve (4056) installed on the other side of its bottom. A high-pressure exhaust nozzle (4057) is connected to the side of the valve (4056). The high-pressure exhaust nozzle (4057) is located on the side of the outer scraper (4044) and the inner scraper (4045).

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