Molding sand treatment device for casting of tractor saddle support

Abstract

The invention relates to the technical field of casting equipment, and particularly discloses a molding sand treatment device for casting a tractor saddle support, which comprises a rack, a coarse sieve plate is arranged at the upper part of the rack, a screening mechanism and a cleaning mechanism are further arranged on the rack, the screening mechanism comprises a fine sieve plate, a crushing plate and an adsorption assembly, and the fine sieve plate is obliquely arranged below the coarse sieve plate; the crushing plate is obliquely suspended above the fine screen plate, a wedge-shaped crushing gap is formed between the crushing plate and the fine screen plate, the caking molding sand can be rubbed and crushed through reciprocating movement of the crushing plate, the adsorption assembly comprises a plurality of magnetic mounting plates arranged below the fine screen plate, and the cleaning mechanism comprises a scraper blade and a collecting box. The collecting box can push the vertically drooping mounting plate to turn over to a cleaning state, the scraping plate scrapes and sweeps the surface of the turned mounting plate, and the collecting box moves along with the scraping plate and collects scraped scrap iron; according to the invention, screening, crushing and iron removal operations in a non-stop state are realized, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, and specifically to a molding sand treatment device for casting tractor saddle brackets. Background Technology

[0002] As a core load-bearing component connecting heavy-duty trucks and trailers, the tractor saddle bracket has a complex structure, significant variations in wall thickness, and extremely high mechanical performance requirements. Sand casting is typically used in the production of such castings. During pouring, the high-temperature molten metal's heat radiation and conduction cause irreversible hardening of the binder in the molding sand adhering to the casting surface, resulting in a large number of hardened clumps after casting removal. Furthermore, during casting cleaning, sand removal, and riser / gating separation, fine iron filings inevitably mix into the molding sand. To achieve molding sand recycling, reduce production costs, and minimize environmental pollution, used sand must undergo regeneration. This process involves two core tasks: first, breaking down the clumps into individual sand grains without damaging their original crystal structure and particle size distribution; and second, thoroughly separating any ferromagnetic impurities to prevent defects such as porosity and inclusions in subsequent castings. Chinese patent document CN118768514B discloses a foundry sand recycling system, including a cylinder and two rollers. The cylinder contains a material distribution mechanism, which is configured in two groups. Each group includes a screening component and a separation component. The screening component includes a screen plate located within the cylinder, which gradually slopes downwards along the rotation direction of the rollers. The separation component includes two arc-shaped plates and a guide structure located within the cylinder, with a crushing channel formed between the two arc-shaped plates. During operation, the molding sand is screened by the screen plate, and the separation component separates the screened agglomerated molding sand from small-diameter molding sand. This allows the rollers to specifically crush the agglomerated molding sand, preventing it from sliding during crushing due to the fluidity of the fine sand particles. Furthermore, the screen plate can guide the agglomerated molding sand between the rollers and the cylinder sidewall into the rotation path of the rollers, ensuring effective crushing of the molding sand.

[0003] Existing equipment for processing molding sand used in tractor saddle bracket casting typically involves collecting all the molding sand and then crushing it by impact. This method can easily damage the sand particle structure, rendering the molding sand unusable. During the iron removal process, the magnet surface quickly becomes covered with iron filings, making it impossible to continue separating the iron filings. This often requires stopping the machine for cleaning, preventing continuous automated operation and thus affecting the quality of molding sand recycling and production efficiency. Summary of the Invention

[0004] This invention provides a molding sand processing device for casting tractor saddle brackets, aiming to solve the problems of related technologies that typically use impact crushing to process agglomerated molding sand during the recycling of casting molding sand, which easily damages the sand particle structure and renders the molding sand unusable; and the problem that during the iron removal process, the magnet surface quickly becomes covered with iron filings, making it impossible to continue separating the iron filings, often requiring machine shutdown for cleaning, and preventing continuous automated operation, thus affecting the quality of molding sand recycling and production efficiency.

[0005] A molding sand treatment device for casting a tractor saddle bracket includes a frame, a coarse screen plate for preliminary screening of molding sand on the upper part of the frame, and a screening mechanism and a cleaning mechanism mounted on the frame. The screening mechanism includes a fine screen plate, a crushing plate, and an adsorption assembly. The fine screen plate is inclinedly arranged below the coarse screen plate, and the crushing plate is inclinedly suspended above the fine screen plate. There is an angle between the crushing plate and the fine screen plate, forming a wedge-shaped crushing gap that gradually narrows along the direction of the molding sand flow. The crushing plate can move along the length of the fine screen plate to frictionally crush the agglomerated molding sand that enters the wedge-shaped crushing gap. The adsorption assembly includes several mounting plates arranged below the fine screen plate. The mounting plates are provided with magnetic structures for adsorbing iron filings. The cleaning mechanism includes a scraper and a collection box. The scraper slides along the length of the fine screen plate and is positioned below it. The mounting plate has an adsorption state and a cleaning state. In the adsorption state, the mounting plate is arranged vertically to adsorb iron filings. In the cleaning state, the collection box pushes the vertically hanging mounting plate to flip to a position parallel to the fine screen plate. The scraper scrapes the surface of the flipped mounting plate, and the collection box moves with the scraper to collect the scraped iron filings.

[0006] The advantages are as follows: This invention achieves efficient recycling of molding sand used in casting tractor saddle supports through a screening and cleaning mechanism. First, the coarse screen plate acts as the first line of defense, effectively intercepting large pieces of waste. Second, the wedge-shaped crushing gap formed between the fine screen plate and the crushing plate, combined with the reciprocating movement of the crushing plate, applies compression and shear friction to the agglomerated molding sand. This frictional crushing breaks down the bonding bridges between sand particles, preventing the sand particles from being crushed and maximizing the integrity of the recycled sand's particle size. Simultaneously, the vertically arranged mounting plates below the fine screen plate form multiple magnetic curtains, increasing the contact area with the sand flow and significantly improving iron removal efficiency. Finally, the cleaning mechanism uses the thrust of the collection box to drive the mounting plates to the cleaning state, allowing the scraper to sweep and the moving collection box to collect iron filings instantly. This achieves screening, crushing, and iron removal operations without stopping the machine, greatly improving production efficiency.

[0007] Preferably, multiple mounting plates are arranged sequentially at intervals along the length of the fine screen plate. Each mounting plate is rotatably mounted on the fine screen plate via a hinge shaft. The horizontal distance between two adjacent hinge shafts is slightly larger than the width of the mounting plate surface to ensure that adjacent mounting plates do not interfere with each other during the process of flipping from the adsorption state to the cleaning state.

[0008] Preferably, a slider capable of moving along the length of the fine screen plate is installed on the frame. The slider has a groove and is installed on both sides of the fine screen plate through the groove, forming a sliding fit with the side of the fine screen plate as a guide rail. The crushing plate is connected to the upper part of the slider, the scraper is connected to the lower part of the slider, and the collection box is detachably installed on the scraper. Thus, the movement of the slider drives the crushing plate, scraper and collection box to move synchronously.

[0009] Preferably, the collection box has a slot in the middle, and the scraper has a snap-fit ​​part at the lower end that matches the slot. The collection box can be detachably suspended below the scraper through the slot, so that the material receiving opening at the top of the collection box is distributed on both sides of the scraper, forming a double-sided material receiving structure.

[0010] Preferably, the width of the mounting plate is greater than half the width of the collection box. Supports are provided on both the front and rear sides of the collection box along the direction of movement. As the scraper moves the collection box forward, the front support contacts the scraper first and forces the mounting plate to flip into a cleaning state, covering the material receiving opening in front of the scraper. The rear support continues to support the mounting plate in the cleaning state after the scraper passes, covering the material receiving opening behind the scraper. This prevents molding sand falling from the fine screen holes from entering the collection box during the cleaning process. The effect is that by providing supports on both the front and rear sides of the collection box, a protective mechanism of "early flipping, continuous support, and delayed reset" is constructed. During the cleaning process, the mounting plate acts as a physical barrier, effectively preventing molding sand continuously falling from the fine screen holes above from accidentally entering the collection box, ensuring the high purity of the recovered iron filings.

[0011] Preferably, the crushing plate is mounted on the slider via an adjusting component. This adjusting component adjusts and locks the tilt angle of the crushing plate relative to the fine screen plate. The crushing plate has a telescopic structure, allowing its extension length to adjust accordingly based on the tilt angle adjustment, ensuring that the end of the crushing plate always maintains sliding contact with the upper surface of the fine screen plate at different tilt angles. The effect is that the telescopic structure of the crushing plate, combined with angle adjustment, compensates for changes in the tilt angle to accommodate molding sand of different hardness, ensuring that the end of the crushing plate always maintains sliding contact with the upper surface of the fine screen plate, thereby ensuring consistent crushing quality.

[0012] Preferably, the adjusting component includes a bracket and a locking structure. The bracket is rotatably mounted on the slider via a rotating shaft, the crushing plate is fixedly mounted on the bracket, and the locking structure is disposed between the bracket and the slider to fix the bracket after the crushing plate is adjusted to a predetermined tilt angle.

[0013] Preferably, the scraper has an installation groove along its length on the side facing the fine screen plate, and a flexible scraper strip is detachably installed in the installation groove. When the mounting plate is in the cleaning state, the flexible scraper strip can adhere to the surface of the rotated mounting plate. The effect is that the flexible scraper strip has good resilience, can adapt to minor unevenness on the surface of the mounting plate, and provides constant contact pressure, ensuring that the adsorbed iron filings are thoroughly scraped off while avoiding scratches on the surface of the mounting plate.

[0014] Preferably, the upper surface of the fine screen plate is evenly distributed with rough protrusions, which are used to increase the frictional resistance to the agglomerated molding sand when the crushing plate moves.

[0015] Preferably, several rollers are rotatably mounted on the inner wall of the chute, and the slider makes rolling contact with the side of the fine screen plate through the rollers. The effect is that by setting rollers in the chute, the contact between the slider and the side of the fine screen plate can be changed from sliding friction to rolling friction, reducing the frictional resistance when the slider moves.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. The present invention is equipped with a crushing plate. The wedge-shaped crushing gap formed between the crushing plate and the fine screen plate gradually narrows along the flow direction. Combined with the rough protrusions on the surface of the fine screen plate, the sand blocks are subjected to continuously enhanced compressive and shear forces in the wedge-shaped space. Compared with the traditional impact crushing, this method mainly destroys the bonding bridges between sand particles without crushing the sand particles themselves, thereby maximizing the preservation of the particle size integrity of the recycled sand.

[0017] 2. This invention is equipped with an adsorption component. By setting vertically spaced mounting plates below the fine screen plate, the contact area between the magnetic surface and the falling sand flow is greatly increased. This allows iron filings mixed in the molding sand to be effectively captured and adsorbed by strong magnetic force when passing through the gaps between the plates, while the molding sand passes smoothly under the action of gravity. Thus, efficient and automatic separation of iron filings and molding sand is achieved during the falling process of the material, which significantly improves the purity of the recycled molding sand.

[0018] 3. The present invention is equipped with a cleaning mechanism. During the reciprocating movement of the scraper, the support part forces the vertically suspended mounting plate to flip to the cleaning state. In conjunction with the scraping action of the scraper, the adsorbed iron filings are peeled off, so that the iron filings fall directly into the collection box that moves synchronously with the scraper. Thus, the automatic peeling and centralized collection of adsorbed iron filings are achieved without stopping the machine or manual intervention.

[0019] 4. This invention constructs a protective mechanism of "early flipping, continuous support and delayed reset" through the coordinated cooperation of the support parts on the front and rear sides of the collection box and the mounting plate. This ensures that the receiving opening of the collection box is always tightly covered by the mounting plate throughout the cleaning process, preventing the molding sand continuously falling from the fine screen plate from accidentally entering the collection box. This minimizes the possibility of molding sand mixed in with iron filings and significantly improves the purity of the recycled iron filings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the present invention cut along its longitudinal direction.

[0022] Figure 3 This is a schematic diagram of the assembly structure of the fine sieve plate and the crushing plate of the present invention.

[0023] Figure 4 This is a schematic diagram of the assembly structure of the screening mechanism and the cleaning mechanism of the present invention.

[0024] Figure 5 For the present invention Figure 4 A magnified structural diagram of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the assembly structure of the scraper and the collection box of the present invention.

[0026] Figure 7 This is a schematic diagram of the assembly structure of the crushing plate and the adjusting component of the present invention.

[0027] Figure label: 1. Frame; 11. Coarse screen plate; 12. Vibrating motor; 13. Collection hopper; 2. Fine screen plate; 21. Rough protrusion; 3. Crushing plate; 31. Support; 311. Rotating shaft; 32. Locking structure; 4. Mounting plate; 41. Hinge shaft; 5. Scraper; 51. Flexible scraper; 6. Collection box; 61. Support part; 7. Slider; 71. Slide groove; 72. Roller. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1-7 As shown, a molding sand treatment device for casting tractor saddle brackets includes a frame 1, a screening mechanism, and a cleaning mechanism.

[0030] like Figures 1-3As shown, the frame 1, serving as the base of the entire device, is welded from high-strength steel, possessing excellent vibration resistance and load-bearing capacity, ensuring no cracking or deformation under long-term high-frequency vibration. A coarse screen plate 11 is installed horizontally or slightly inclined on the upper part of the frame 1. The coarse screen plate 11 is typically made of wear-resistant high-manganese steel with relatively large screen holes. In the initial stage of post-casting processing, utilizing the large screen holes of the coarse screen plate 11, most of the loose molding sand and smaller sand blocks can smoothly pass through the screen holes and fall directly into the screening and crushing steps below. Only a small portion of large hard objects exceeding the screen hole size (such as large risers and gating gates, unseparated castings, etc.) are intercepted by the coarse screen plate 11 and retained on the screen surface. This design effectively creates a physical barrier, effectively isolating large, hard objects that could cause mechanical damage to the screening mechanism below, playing a crucial protective role and significantly extending the service life of the core processing unit.

[0031] like Figure 1 and Figure 2 As shown, a vibratory motor 12 is installed on the frame 1, serving as the power source for the entire screening system. When the vibratory motor 12 starts, it generates a powerful excitation force that drives the entire coarse screen plate 11 to perform high-frequency reciprocating motion. Under the action of inertial force, the raw material undergoes violent shaking and jumping on the screen surface of the coarse screen plate 11, causing the agglomerated raw material to be initially loosened on the screen surface, and causing the molding sand surrounding the castings or large pieces of waste to fall off, creating conditions for subsequent processing.

[0032] like Figures 1-3 As shown, the screening mechanism includes a fine screen plate 2 and a crushing plate 3. The fine screen plate 2 is inclined below the coarse screen plate 11, forming a slope suitable for material gravity flow. A collection hopper 13 is provided below the fine screen plate 2, with a discharge port at the bottom of the collection hopper 13, which is used to collect fine sand particles that pass through the screen holes of the fine screen plate 2. The screen hole size of the fine screen plate 2 is much smaller than that of the coarse screen plate 11, and its main function is to perform secondary fine screening on the material that has been initially screened and loosened by the coarse screen plate 11. When the material falls from the coarse screen plate 11 into the fine screen plate 2, it slides down the inclined surface of the fine screen plate 2 under the action of high-frequency vibration. During this process, molding sand particles with a particle size smaller than the screen holes of the fine screen plate 2 can pass through the screen holes smoothly and fall into the collection hopper 13 below, while a small amount of incompletely loosened molding sand clumps are intercepted by the fine screen plate 2 for crushing by the crushing plate 3.

[0033] like Figures 1-3As shown, the crushing plate 3 is inclined and suspended above the fine screen plate 2. The crushing plate 3 and the fine screen plate 2 are not parallel, but have an angle, forming a wedge-shaped crushing gap that gradually narrows along the direction of the molding sand flow. In this embodiment, the fine screen plate 2 includes a guide section located directly below the coarse screen plate 11 and a screening section located obliquely below the coarse screen plate 11. The screen holes of the fine screen plate 2 are opened on the screening section, and the collection hopper 13 is located directly below the screening section. The crushing plate 3 can reciprocate within the screening section along the length direction of the fine screen plate 2 to frictionally crush the agglomerated molding sand entering the wedge-shaped crushing gap. Specifically, when the not completely loosened molding sand agglomerates slide down the fine screen plate 2 with the material flow to the inlet of the wedge-shaped crushing gap, the gap between the crushing plate 3 and the fine screen plate 2 gradually decreases along the material flow direction. Under the combined action of vibration and its own gravity, the molding sand agglomerates are forced into the wedge-shaped space. At this time, the crushing plate 3 slides along the length direction of the fine screen plate 2. During the relative movement of the crushing plate 3 and the fine screen plate 2, the molding sand clump located in the wedge-shaped crushing gap is subjected to the combined action of friction and extrusion from the bottom surface of the crushing plate 3 and the upper surface of the fine screen plate 2. These forces are sufficient to overcome the adhesion force inside the molding sand clump, so that the molding sand clump is gradually kneaded, crushed and finally broken into fine particles that meet the requirements of the screen hole size of the fine screen plate 2. The crushed molding sand particles then pass through the screen holes of the fine screen plate 2 and fall into the collection hopper 13.

[0034] Furthermore, the upper surface of the fine screen plate 2 is evenly distributed with rough protrusions 21. These rough protrusions 21 can be designed as hemispherical, pyramidal, or strip-shaped structures to increase the frictional resistance to the agglomerated molding sand when the crushing plate 3 moves. When the crushing plate 3 moves along the length of the fine screen plate 2, the agglomerated molding sand is subjected to the upward supporting force of the fine screen plate 2, the downward compressive force of the crushing plate 3, and the additional frictional force provided by the rough protrusions 21 within the wedge-shaped crushing gap. The combined effect of these three forces makes the agglomerated molding sand easier to grind and crush.

[0035] like Figures 1-6 As shown, the screening mechanism also includes an adsorption component for adsorbing iron filings. The adsorption component includes several mounting plates 4 disposed below the fine screen plate 2. These mounting plates 4 are arranged sequentially at intervals along the length of the fine screen plate 2, and each mounting plate 4 is in a vertically hanging state. The mounting plate 4 is provided with a magnetic structure for adsorbing iron filings. Preferably, the mounting plate 4 is made of a thin-walled shell of non-magnetic wear-resistant stainless steel, and the magnetic structure is composed of a magnet core assembly encapsulated inside the mounting plate 4. When the fine sand falls through the fine screen plate 2, the vertically arranged mounting plates 4 form multiple "magnetic curtains", which greatly increases the contact probability between the iron filings and the magnetic surface, thereby efficiently adsorbing the iron filings.

[0036] like Figures 1-3As shown, the cleaning mechanism is used to clean and collect iron filings adsorbed on the surface of the mounting plate 4. It includes a scraper 5 and a collection box 6. The scraper 5 is slidably disposed below the fine screen plate 2 along its length. The collection box 6 is detachably mounted on the scraper 5, allowing the collection box 6 to move synchronously with the scraper 5. To achieve effective cleaning of the mounting plate 4, the top of each mounting plate 4 is rotatably connected to the bottom of the fine screen plate 2 via a hinge shaft 41. Each mounting plate 4 can be flipped around the corresponding hinge shaft 41, allowing the mounting plate 4 to switch between an adsorption state and a cleaning state. In the adsorption state, the mounting plate 4 hangs vertically under the influence of gravity to adsorb iron filings. In the cleaning state, as the scraper 5 moves, the collection box 6 will contact the vertically hanging mounting plate 4 before the scraper 5 and apply a horizontal thrust, forcing the mounting plate 4 to overcome gravity and flip around the top hinge shaft 41 to a position parallel to the fine screen plate 2. At this time, the scraper 5 can scrape the surface of the flipped mounting plate 4, and the collection box 6 moves with the scraper 5 and collects the scraped iron filings.

[0037] To ensure the safety of the mechanism's operation, the horizontal distance between two adjacent hinge shafts 41 is designed to be slightly larger than the width of the mounting plate 4. This ensures that when the first mounting plate 4 is flipped to a position parallel to the fine screen plate 2, its lower end will not collide with the body of the second mounting plate 4 or the hinge shaft 41. This ensures that the adjacent mounting plates 4 do not interfere with each other during subsequent flipping processes, thus ensuring smooth and unobstructed operation.

[0038] like Figures 3-6 As shown, to achieve a detachable connection between the scraper 5 and the collection box 6, a slot is provided in the middle of the collection box 6, and a snap-fit ​​part is provided at the lower end of the scraper 5 to match the slot. Through the cooperation of the slot and the snap-fit ​​part, the collection box 6 can be detachably suspended below the scraper 5, ensuring that the material receiving openings at the top of the collection box 6 are distributed on both sides of the scraper 5, forming a double-sided material receiving structure. When the scraper 5 moves forward, it can scrape the iron filings on the rear surface of the mounting plate 4. The scraped iron filings fall along the scraper 5 and smoothly enter the collection box 6 through the material receiving opening on the front side of the scraper 5. Similarly, when the scraper 5 moves backward, it can scrape the iron filings on the front surface of the mounting plate 4. The scraped iron filings will be collected into the collection box 6 through the material receiving opening on the rear side of the scraper 5. After screening, the collected iron filings can be easily removed by simply removing the collection box 6.

[0039] like Figures 1-6As shown, to further improve the purity of iron filings collection and prevent molding sand from accidentally entering the collection box 6 at various stages of the cleaning process, the width of the mounting plate 4 is greater than 1 / 2 the width of the collection box 6, and support parts 61 are provided on the front and rear sides of the collection box 6. The support part 61 is a wing plate integrally formed with the collection box 6. The upper surface of the support part 61 is designed as a smooth arc rather than a flat surface to reduce the risk of jamming during flipping. The height of the support part 61 is set so that when the mounting plate 4 is in the cleaning state, the support part 61 can effectively support the lower surface of the mounting plate 4. Specifically, when the slider 7 drives the scraper 5 to move forward, the support part 61 located in front of the scraper 5 will contact the vertically hanging mounting plate 4 before the scraper 5. At this time, the front support part 61 can push the mounting plate 4 to overcome gravity and flip upward in advance. When the mounting plate 4 is flipped to the cleaning state, it overlaps the front support 61. At this time, the plate body of the mounting plate 4 covers the material receiving opening on the front side of the scraper 5 and seals the screen holes in the corresponding area of ​​the upper fine screen plate 2, thus covering the material receiving opening on the front side before the scraper 5 arrives. As the slider 7 continues to move forward, the scraper 5 scrapes the surface of the mounting plate 4, and the scraped iron filings enter the collection box 6 through the material receiving opening on the front side. After the main body of the scraper 5 slides past the mounting plate 4, the mounting plate 4 should immediately fall back to its original position under the action of gravity. However, at this time, the support 61 located on the rear side of the scraper 5 intervenes and continues to support the mounting plate 4, keeping it in the cleaning state and preventing it from falling. At this time, the plate body of the mounting plate 4 covers the material receiving opening on the rear side of the scraper 5 and continues to seal the screen holes in the corresponding area of ​​the upper fine screen plate 2, thus protecting the material receiving opening on the rear side from contamination by the molding sand falling from above after the scraper 5 leaves. Therefore, through the cooperation of the mounting plate 4 and the support part 61, the receiving opening of the collection box 6 exposed below the fine screen plate 2 is always tightly covered by the mounting plate 4 during the entire moving cleaning process, minimizing the possibility of molding sand being mixed in.

[0040] Furthermore, the scraper 5 has an installation groove along its length at one end facing the fine screen plate 2, and a flexible scraper strip 51 is detachably installed in the installation groove for easy replacement. When the mounting plate 4 is in the cleaning state, the flexible scraper strip 51 can conform to the surface of the flipped mounting plate 4. The flexible scraper strip 51 is preferably made of polyurethane material, which has good resilience and wear resistance, can adapt to the slight unevenness of the surface of the mounting plate 4, and generates elastic deformation during the scraping process, providing constant contact pressure. This ensures that iron filings are scraped off cleanly, and also acts as a buffer to prevent scratches on the surface of the mounting plate 4.

[0041] like Figures 3-6As shown, to enable the movement of the crushing plate 3 and the scraper 5, a slider 7 capable of moving along the length of the fine screen plate 2 is installed on the frame 1. The crushing plate 3 is connected to the upper part of the slider 7, and the scraper 5 is connected to the lower part of the slider 7. Thus, the movement of the slider 7 drives the crushing plate 3, the scraper 5, and the collection box 6 to move synchronously. In addition, a cylinder (not shown in the figure) is also provided on the frame 1. The cylinder is installed on the side wall of the frame 1 and is connected to the slider 7 for transmission, and is used to drive the slider 7 to move.

[0042] Furthermore, the slider 7 is provided with a sliding groove 71. The slider 7 is installed on both sides of the fine screen plate 2 through the sliding groove 71, and forms a sliding fit with the side of the fine screen plate 2 as a guide rail. The inner sidewall of the sliding groove 71 is in close contact with the side of the fine screen plate 2, ensuring that the slider 7 will not shift laterally during movement, thereby ensuring a stable and reliable crushing effect of the crushing plate 3 on the molding sand and scraping effect of the scraper 5 on the iron filings. At the same time, in order to reduce the frictional resistance when the slider 7 moves, several rollers 72 are rotatably installed on the inner wall of the sliding groove 71. The slider 7 rolls against the side of the fine screen plate 2 through the rollers 72, making the slider 7 move more smoothly and steadily, reducing mechanical wear, and improving the service life and operational reliability of the device.

[0043] like Figures 1-3 As shown, the crushing plate 3 is mounted on the slider 7 via an adjusting member. The adjusting member is used to adjust and lock the tilt angle of the crushing plate 3 relative to the fine screen plate 2. The adjusting member includes a bracket 31 and a locking structure 32. The bracket 31 is rotatably mounted on the slider 7 via a rotating shaft 311, and the crushing plate 3 is fixedly mounted on the bracket 31. The locking structure 32 is disposed between the bracket 31 and the slider 7 and is used to fix the bracket 31 after the crushing plate 3 is adjusted to a predetermined tilt angle. Preferably, the locking structure 32 can adopt a bolt and arc-shaped waist hole cooperation form, wherein the arc-shaped waist hole is opened on the side wall of the slider 7, and its center coincides with the axis of the rotating shaft 311. The bolt passes through the arc-shaped waist hole and is threadedly connected to the bracket 31. When it is necessary to adjust the tilt angle of the crushing plate 3, simply loosen the bolt and push the bracket 31 to rotate around the rotating shaft 311 to the required angle. At this time, the bolt slides synchronously in the arc-shaped waist hole. After the angle is determined, the bolt is tightened again to firmly lock the bracket 31 and the slider 7.

[0044] To accommodate the angle adjustment function of the crushing plate 3, the crushing plate 3 is designed with a telescopic structure, allowing it to adjust its extension length according to the adjustment of the tilt angle. This ensures that the end of the crushing plate 3 always maintains sliding contact with the upper surface of the fine screen plate 2 at different tilt angles. Specifically, the crushing plate 3 consists of a fixed section and a sliding section. The fixed section is fixedly connected to the bracket 31, and the sliding section is fitted inside the fixed section. The connection between the fixed section and the sliding section is externally covered with a flexible dust cover to prevent fine sand particles from entering the telescopic gap. When the extension length of the crushing plate 3 needs to be adjusted due to changes in the tilt angle, the sliding section can freely extend and retract relative to the fixed section. This ensures that during the adjustment of the tilt angle, the bottom end of the sliding section always remains tightly against the upper surface of the fine screen plate 2, ensuring the effective formation of the wedge-shaped crushing gap and the continuous crushing effect on agglomerated sand.

[0045] Based on the above-described device, the working process and working principle of the present invention are as follows: The vibrating motor 12 on the frame 1 is started, and the mixed foundry sand to be processed is poured onto the top coarse screen plate 11. Under the continuous excitation of the vibrating motor 12, the coarse screen plate 11 generates high-frequency vibration, causing the sand to jump and roll continuously on the screen surface. The larger screen holes of the coarse screen plate 11 intercept large pieces of waste, risers, etc., at the top, while loose sand and small pieces of material pass through smoothly and fall to the fine screen plate 2 below. The fine screen plate 2 also performs secondary fine screening of the sand under the action of vibration. The agglomerated sand is intercepted on the surface of the fine screen plate 2, and the molding sand that meets the particle size requirements passes through the screen holes and flows through the vertically suspended mounting plate 4 array and falls into the collection hopper 13 below. The iron filings in it are attracted and trapped by the magnetic structure on the mounting plate 4.

[0046] As the screening operation continues, the cylinder is activated, driving the slider 7 to move slowly along the length of the fine screen plate 2. The crushing plate 3 driven by the slider 7 forms a wedge-shaped gap with the screen surface, forcibly squeezing and rubbing the agglomerated molding sand flowing through this area. Combined with the blocking effect of the rough protrusions 21, the intercepted agglomerated molding sand and larger particles are crushed and reduced in size to be able to pass through the screen holes of the fine screen plate 2.

[0047] Simultaneously, the slider 7 moves the scraper 5 and the collection box 6, and the front support 61 contacts and pushes up the vertical mounting plate 4. Under the thrust, the mounting plate 4 flips upward to the cleaning state, at which point its plate body covers the material receiving opening of the collection box 6, forming a shielding barrier to prevent fine sand continuously falling from above from mixing in. Next, the flexible scraper 51 slides across the surface of the flipped mounting plate 4, scraping the iron filings into the shielded collection box 6. After the support 61 behind the scraper 5 slides past the mounting plate 4, the mounting plate 4 automatically resets and hangs down to continue the adsorption task. After screening, the collected iron filings can be removed simply by removing the collection box 6.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A molding sand processing device for casting a tractor saddle bracket, comprising a frame (1), wherein the upper part of the frame (1) is provided with a coarse screen plate (11) for preliminary screening of the molding sand, characterized in that, It also includes a screening mechanism and a cleaning mechanism mounted on the frame (1); The screening mechanism includes a fine screen plate (2), a crushing plate (3) and an adsorption assembly. The fine screen plate (2) is inclinedly arranged below the coarse screen plate (11), and the crushing plate (3) is inclinedly suspended above the fine screen plate (2). The crushing plate (3) and the fine screen plate (2) have an angle to form a wedge-shaped crushing gap that gradually narrows along the direction of the molding sand flow. The crushing plate (3) can move along the length of the fine screen plate (2) to perform friction crushing on the agglomerated molding sand that enters the wedge-shaped crushing gap. The adsorption assembly includes several mounting plates (4) arranged below the fine screen plate (2). The mounting plates (4) are provided with magnetic structures for adsorbing iron filings. The cleaning mechanism includes a scraper (5) and a collection box (6). The scraper (5) is slidably disposed below the fine screen plate (2) along the length of the fine screen plate (2). The mounting plate (4) has an adsorption state and a cleaning state. In the adsorption state, the mounting plate (4) is arranged vertically to adsorb iron filings. In the cleaning state, the collection box (6) can push the vertically hanging mounting plate (4) to flip to a position parallel to the fine screen plate (2). The scraper (5) scrapes the surface of the flipped mounting plate (4). The collection box (6) moves with the scraper (5) and collects the scraped iron filings.

2. The molding sand treatment device for casting a tractor saddle bracket according to claim 1, characterized in that, Multiple mounting plates (4) are arranged sequentially at intervals along the length of the fine screen plate (2). Each mounting plate (4) is rotatably mounted on the fine screen plate (2) via a hinge shaft (41). The horizontal distance between two adjacent hinge shafts (41) is slightly greater than the width of the mounting plate (4) to ensure that the adjacent mounting plates (4) do not interfere with each other during the process of flipping from the adsorption state to the cleaning state.

3. The molding sand treatment device for casting a tractor saddle bracket according to claim 1, characterized in that, A slider (7) is installed on the frame (1) and can move along the length of the fine screen plate (2). A groove (71) is provided on the slider (7). The slider (7) is installed on both sides of the fine screen plate (2) through the groove (71) and forms a sliding fit with the side of the fine screen plate (2) as a guide rail. The crushing plate (3) is connected to the upper part of the slider (7), the scraper (5) is connected to the lower part of the slider (7), and the collection box (6) is detachably installed on the scraper (5). Thus, the movement of the slider (7) drives the crushing plate (3), the scraper (5) and the collection box (6) to move synchronously.

4. The molding sand treatment device for casting a tractor saddle bracket according to claim 1, characterized in that, The collection box (6) has a slot in the middle, and the scraper (5) has a snap-fit ​​part at the lower end that matches the slot. The collection box (6) can be detachably suspended below the scraper (5) through the slot, so that the material receiving opening at the top of the collection box (6) is distributed on both sides of the scraper (5), forming a double-sided material receiving structure.

5. The molding sand treatment device for casting a tractor saddle bracket according to claim 4, characterized in that, The width of the mounting plate (4) is greater than 1 / 2 the width of the collection box (6). The collection box (6) is provided with support parts (61) on both the front and rear sides along the direction of movement. During the process of the scraper (5) driving the collection box (6) to move forward, the support part (61) located on the front side can contact the scraper (5) first and forcefully guide the mounting plate (4) to flip to the cleaning state, so that it covers the material receiving opening on the front side of the scraper (5). The support part (61) located on the rear side can continue to support the mounting plate (4) to remain in the cleaning state after the scraper (5) passes, so that it covers the material receiving opening on the rear side of the scraper (5), thereby blocking the molding sand falling from the screen holes of the fine screen plate (2) from entering the collection box (6) during the cleaning process.

6. The molding sand treatment device for casting a tractor saddle bracket according to claim 3, characterized in that, The crushing plate (3) is mounted on the slider (7) by an adjusting member. The adjusting member is used to adjust and lock the tilt angle of the crushing plate (3) relative to the fine screen plate (2). The crushing plate (3) is a telescopic structure, which allows the crushing plate (3) to adjust its extension length according to the adjustment amount of the tilt angle, ensuring that the end of the crushing plate (3) always maintains sliding contact with the upper surface of the fine screen plate (2) under different tilt angles.

7. The molding sand treatment device for casting a tractor saddle bracket according to claim 6, characterized in that, The adjusting component includes a bracket (31) and a locking structure (32). The bracket (31) is rotatably mounted on the slider (7) via a rotating shaft (311). The crushing plate (3) is fixedly mounted on the bracket (31). The locking structure (32) is located between the bracket (31) and the slider (7) and is used to fix the bracket (31) after the crushing plate (3) is adjusted to a predetermined tilt angle.

8. The molding sand treatment device for casting a tractor saddle bracket according to claim 1, characterized in that, The scraper (5) has an installation groove along its length on the side facing the fine screen plate (2). A flexible scraper (51) is detachably installed in the installation groove. When the installation plate (4) is in the cleaning state, the flexible scraper (51) can adhere to the surface of the flipped installation plate (4).

9. The molding sand treatment device for casting a tractor saddle bracket according to claim 1, characterized in that, The upper surface of the fine screen plate (2) is evenly covered with rough protrusions (21), which are used to increase the frictional resistance to the agglomerated sand when the crushing plate (3) moves.

10. The molding sand treatment device for casting a tractor saddle bracket according to claim 3, characterized in that, Several rollers (72) are rotatably installed on the inner wall of the chute (71), and the slider (7) rolls and contacts the side of the fine screen plate (2) through the rollers (72).

Images