Sand spraying device for casting production

Abstract

The utility model relates to the technical field of rain shower sand adding device, and disclose a foundry production with mould sand rain shower device, include: support, the top of support is provided with the top plate, and the both sides of top plate bottom are provided with support guide rail, and the bottom of support guide rail is provided with base, and base connects support and support guide rail, and the central fixed setting of top plate bottom is provided with cylinder no.

Description

Technical Field

[0001] This utility model relates to the technical field of rain-feeding sand dispensers, specifically a rain-feeding device for molding sand used in casting production. Background Technology

[0002] In the field of casting production, sand casting has become one of the most widely used casting processes due to its low cost and wide applicability. As the core raw material of sand casting, the quality of molding sand and its uniformity of distribution directly affect the precision, surface quality, and internal properties of the castings, playing a decisive role in the smooth progress of subsequent casting processes and the final product quality.

[0003] As a key piece of equipment in the molding sand processing, the sand spraying device's main function is to evenly distribute the molding sand onto the surface of the casting mold, laying the foundation for forming a qualified sand mold. However, currently available sand spraying devices for casting production have certain shortcomings and cannot meet the demands of efficient and high-quality production.

[0004] On the one hand, existing rain-feeding sand-addition devices generally lack the ability to effectively control the flow rate of molding sand. In actual production, different types and sizes of castings often require molding sand with different flow rates to ensure the compactness and uniformity of the sand mold. However, existing devices cannot flexibly adjust the sand feed rate from the preparation area to the rain-feeding sand discharge area according to production needs. This results in either the molding sand flow rate being too fast, causing local accumulation and affecting the sand mold density, or the flow rate being too slow, reducing production efficiency. At the same time, uneven distribution of molding sand can also lead to defects such as porosity and shrinkage cavities in the castings, significantly increasing the scrap rate of the castings.

[0005] On the other hand, existing equipment is typically fixed in place and cannot be adjusted for different sizes and shapes of the casting molds or the actual working conditions of the production site. When faced with molds of varying heights or when adjusting the sand drop distance to optimize distribution, existing equipment cannot adapt, resulting in sand not accurately and evenly covering the mold surface. This not only reduces the equipment's versatility and applicability but also necessitates different rain-drenching devices for different molds, increasing production costs. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a molding sand rain shower device for casting production.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A molding sand rain shower device for casting production includes: a support frame, a top plate on the top of the support frame, support rails on the left and right sides of the bottom of the top plate, a base at the bottom of the support rails, the base connecting the support frame and the support rails, a cylinder fixedly installed at the center of the bottom of the top plate, a chain connecting block fixedly installed at the top of the telescopic rod of the cylinder, a sand filling box at the bottom of the chain connecting block, connecting brackets fixedly installed at the four corners of the top of the sand filling box, the connecting brackets and the chain connecting block being connected and fixed by multiple sets of chains, a sand inlet on the front side of the sand filling box, a control component in the center of the sand filling box, and a sand outlet at the bottom of the sand filling box.

[0009] The upper part of the sand filling box is the sand preparation area, and the lower part is the rain-drenched sand discharge area. A partition is set between the sand preparation area and the rain-drenched sand discharge area. A circular through hole is set in the center of the partition. The control components are symmetrically arranged on the left and right sides. The control components are used to control the sand feeding speed from the sand preparation area to the rain-drenched sand discharge area.

[0010] The control components include: a movable plate; bottom plates are provided on both the left and right sides of the rain-discharging sand area in the sand-adding box; support plates are provided on the front and rear sides of the bottom plates; triangular grooves are provided on the support plates; two sets of fixed blocks are provided in the center of the bottom plate; a rotating shaft is provided between the fixed blocks; a cam is movably connected to the rotating shaft; and a cylinder is fixedly provided on the end of the cam away from the fixed blocks.

[0011] The bottom of the circular through hole of the partition is provided with a symmetrical movable plate. Two sets of fixed blocks are fixedly installed at the bottom of the movable plate. A rotating shaft is fixedly installed between the fixed blocks. A second cam is movably connected on the rotating shaft. The telescopic rod of the second cylinder is fixedly connected to the second cam. Triangular protrusions are provided at the bottom of the movable plate at the front and back. The triangular protrusions and triangular grooves are fitted with a clearance fit.

[0012] Preferably, a square protrusion is provided in the center of the front and rear outer walls of the sand filling box. The square protrusion is used to support the guide rail and, under the action of cylinder one, realize the lifting and lowering of the sand filling box.

[0013] Preferably, a perforated plate is provided on the sand outlet at the bottom of the sand filling box, and multiple sets of sand drop holes are provided on the perforated plate. The sand drop holes are used to evenly discharge sand from the rain-drenched sand discharge area into the sand box.

[0014] Preferably, the top of the circular through-hole of the partition is provided with a mesh screen, which is used to filter out large impurities and stones from the sand preparation area to the rain-dried sand discharge area.

[0015] Compared with the prior art, this utility model provides a molding sand rain shower device for casting production, which has the following beneficial effects:

[0016] By controlling the moving plate, cylinder two, cam one, cam two, and the mating structure of the triangular groove and triangular protrusion in the control assembly, the opening and closing size of the circular through hole of the partition plate can be precisely adjusted, thereby flexibly controlling the sand feed rate and speed. During production, the required molding sand flow rate can be precisely matched according to the process requirements of different castings, ensuring that the molding sand falls evenly from the outlet, avoiding problems such as sand accumulation or uneven distribution caused by improper flow rate, improving the quality of the sand mold, reducing the casting scrap rate, and ensuring the precision and performance of the castings.

[0017] The sand-filling box's lifting function is achieved through a structure consisting of a top plate, support rails, cylinder one, chain connecting blocks, and chains. When dealing with casting molds of different sizes and heights, the extension and retraction of cylinder one drives the chain connecting blocks, which in turn pulls the sand-filling box up and down along the support rails, adjusting the distance between the sand outlet at the bottom of the box and the mold surface. This function allows the molding sand to fall at the most suitable height according to the specific mold, ensuring accurate and uniform coverage of the mold surface. This improves the device's adaptability to different production conditions, eliminates the need for separate equipment for different molds, reduces production costs, and increases production efficiency and equipment versatility. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the partition plate of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the sand-exposing area in this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the control component in this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the bottom of the control component in this utility model;

[0024] Figure 7 This is a three-dimensional structural diagram of the perforated plate of this utility model.

[0025] The components include: 1. Sand filling box; 2. Support frame; 3. Cylinder 1; 4. Connecting support frame; 5. Partition plate; 6. Control components; 7. Perforated plate; 101. Square protrusion; 102. Sand inlet; 201. Top plate; 202. Support rail; 301. Chain connecting block; 302. Chain; 501. Mesh; 601. Moving plate; 602. Bottom plate; 603. Triangular groove; 604. Cylinder 2; 606. Fixing block; 607. Cam 2; 701. Sand drop hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-7 As shown in the figure, a molding sand rain shower device for casting production in this embodiment includes a support 2. The top of the support 2 is fixedly connected to a top plate 201, which provides a stable upper support structure for the entire device. Support rails 202 are provided on the left and right sides of the bottom of the top plate 201. The bottom of the support rails 202 is connected to the support 2 through a base. The presence of the base enhances the stability of the connection between the support rails 202 and the support 2, and provides a guiding foundation for the lifting and lowering of the sand filling box 1.

[0028] The top plate 201 is fixedly connected to the cylinder 3 at the bottom center, which ensures that the cylinder 3 can output power stably. The top of the telescopic rod of the cylinder 3 is fixedly connected to the chain connecting block 301. The chain connecting block 301 is connected to the connecting brackets 4 at the four corners of the top of the sand filling box 1 through multiple sets of chains 302. The chain connection method allows the telescopic movement of the cylinder 3 to be converted into the lifting movement of the sand filling box 1.

[0029] A sand inlet 102 is provided on the front side of the sand filling box 1, providing a channel for molding sand to enter the device. The interior of the sand filling box 1 is divided into an upper sand preparation area and a lower rain-discharge sand area by a partition 5. A circular through hole in the center of the partition 5 enables the flow of molding sand between the two areas. A symmetrical movable plate 601 is provided at the bottom of the circular through hole of the partition 5. The movable plate 601 constitutes the core part of the control component 6 and is used to adjust the opening and closing size of the through hole.

[0030] The sand-feeding box 1 has bottom plates 602 on both the left and right sides of the rain-discharge sand zone. Triangular grooves 603 are provided on the support plates on the front and rear sides of the bottom plates 602. A triangular protrusion at the bottom of the moving plate 601 is fitted with the triangular groove 603 with a clearance, providing guidance for the left and right movement of the moving plate 601. A rotating shaft is provided between the two fixed blocks in the center of the bottom plate 602. One end of a cam 601 is movably connected to the rotating shaft and fixedly connected to a cylinder 604. The telescopic rod of the cylinder 604 is connected to a cam 607 on the rotating shaft between the fixed blocks 606 at the bottom of the moving plate 601. Through the extension and retraction of the cylinder 604, the cams 601 and 607 can rotate, thereby pushing the moving plate 601 along the triangular groove 603, thus controlling the sand-feeding speed.

[0031] In some examples, the side wall of the sand filling box 1 is provided with a through hole for connecting the pneumatic hose of the cylinder to the outside.

[0032] In some examples, a square protrusion 101 is provided in the center of the front and rear outer walls of the sand filling box 1. The square protrusion 101 cooperates with the support guide rail 202. When the cylinder 3 drives the chain connecting block 301 and the chain 302 to move, it can ensure that the sand filling box 1 moves smoothly up and down along the support guide rail 202, avoid shaking or deviation during the lifting process, and improve the stability of the device operation.

[0033] In some examples, a perforated plate 7 is provided on the sand outlet at the bottom of the sand filling box 1. The multiple sets of sand drop holes 701 on the perforated plate 7 can further disperse the molding sand falling from the rain-drenched sand outlet area, so that the molding sand falls into the sand box in a more uniform state, avoiding the local accumulation caused by the molding sand accumulating at the sand outlet and falling down, and improving the uniformity of the molding sand distribution.

[0034] In some examples, a mesh 501 is provided at the top of the circular through hole of the partition 5. The mesh 501 can filter the molding sand entering the rain-dried sand discharge area from the sand preparation area, intercept large impurities and stones, prevent impurities from entering the rain-dried sand discharge area and clogging the sand drop hole 701 or mixing into the molding sand, thus affecting the quality of the casting and ensuring the purity of the molding sand.

[0035] The working principle of this utility model is as follows:

[0036] When using this sand rain shower device for casting production, first, place the support 2 stably in the working area, utilizing the stable structure at the bottom of the support 2 to ensure the overall stability of the device. The top plate 201 is fixedly connected to the top of the support 2, and the support rails 202 on the left and right sides of its bottom are connected to the support 2 through the base, forming a vertical guide structure. The sand filling box 1 is connected to the chain 302 through the connecting brackets 4 at the four corners of the top. The other end of the chain 302 is fixed to the chain connecting block 301 in the center of the top plate 201, and the chain connecting block 301 is connected to the telescopic rod of the cylinder 3, forming a lifting drive system. At the same time, the square protrusions 101 on the front and rear outer walls of the sand filling box 1 are embedded in the support rails 202 to ensure the accuracy of guidance during the lifting process.

[0037] Before starting the device, the height of the sand-adding box 1 needs to be adjusted by controlling the extension and retraction of cylinder 3 according to the height of the casting mold and the requirements of the molding sand distribution. When cylinder 3 extends, the chain connecting block 301 pulls the sand-adding box 1 up along the support guide rail 202 via the chain 302; when cylinder 3 retracts, the sand-adding box 1 descends along the guide rail under the action of gravity until it is adjusted to a suitable sand discharge height. The cooperation between the square protrusion 101 and the support guide rail 202 can prevent deviation during the lifting and lowering process and ensure positional accuracy.

[0038] During the sand-adding stage, operators add molding sand to the sand preparation area through the sand inlet 102 on the front side of the sand-adding box 1. At this time, the mesh 501 on the top of the partition 5 will perform preliminary filtration of the molding sand, intercepting large impurities and stones to prevent impurities from entering subsequent stages and clogging the sand drop hole 701 or affecting the quality of the casting. The molding sand in the sand preparation area is temporarily stored above the partition 5, waiting to enter the rain-drain sand discharge area.

[0039] When the rain-drenching sand removal operation is required, cylinder 604 in control component 6 is activated. The extension and retraction of cylinder 604 causes cam 1 to rotate around the central axis of base plate 602, which in turn drives the moving plate 601 via cam 607. The triangular protrusion at the bottom of the moving plate 601 slides along the triangular groove 603 on the support plate of base plate 602, achieving left and right translation, thereby adjusting the opening and closing size of the central circular through hole in partition plate 5. The larger the opening of the through hole, the faster the molding sand flows from the sand preparation area into the rain-drenching sand removal area; the smaller the opening, the slower the flow rate, thus meeting the requirements of different casting processes for sand feeding speed.

[0040] The molding sand entering the rain-drenching sand discharge zone flows towards the bottom sand outlet under gravity. When it passes through the perforated plate 7 at the bottom of the sand filling box 1, it is further dispersed through multiple sets of sand drop holes 701 on the perforated plate 7. The uniform distribution of the sand drop holes 701 ensures that the molding sand falls evenly into the sand box below in a rain-drenching manner, avoiding local accumulation and ensuring consistent sand mold density.

[0041] After the operation is completed, cylinder 604 is closed to reset the moving plate 601, sealing the baffle through hole to stop sand feeding. Then, cylinder 3 is used to lower the sand feeding box 1 to the initial position. In the device, the screen 501 can be easily disassembled and cleaned to maintain the filtration effect, and the perforated plate 7 can also be removed separately to clean the residual molding sand in the sand discharge hole, ensuring smooth sand discharge in subsequent use.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molding sand rain shower device for casting production, characterized in that, include: The bracket (2) has a top plate (201) on top and a support rail (202) on the left and right sides of the bottom of the top plate (201). The support rail (202) has a base at the bottom and the base connects the bracket (2) and the support rail (202). The top plate (201) has a cylinder (3) fixedly installed in the center of the bottom. The cylinder (3) has a chain connecting block (301) fixedly installed on the top of the telescopic rod. The chain connecting block (301) has a sand filling box (1) at the bottom. The sand filling box (1) has a connecting bracket (4) fixedly installed at the four corners of the top. The connecting bracket (4) and the chain connecting block (301) are connected and fixed by multiple chains (302). The sand filling box (1) has a sand inlet (102) on the front side. The sand filling box (1) has a control component (6) in the center. The sand filling box (1) has a sand outlet at the bottom. The upper part of the sand filling box (1) is the sand preparation area, and the lower part is the rain-dried sand discharge area. A partition (5) is provided between the sand preparation area and the rain-dried sand discharge area. A circular through hole is provided in the center of the partition (5). The control components (6) are symmetrically arranged on the left and right sides. The control components are used to control the sand feeding speed from the sand preparation area to the rain-dried sand discharge area. The control component (6) includes: a movable plate (601), a bottom plate (602) on both the left and right sides of the rain-out sand area in the sand box (1), a support plate on the front and rear sides of the bottom plate (602), a triangular groove (603) on the support plate, two sets of fixed blocks II in the center of the bottom plate (602), a rotating shaft between the fixed blocks II, a cam I movably connected on the rotating shaft, and a cylinder II (604) fixedly installed on the end of the cam I away from the fixed blocks II; The bottom of the circular through hole of the partition (5) is provided with a symmetrical movable plate (601). Two sets of fixed blocks (606) are fixedly installed at the bottom of the movable plate (601) at the front and back. A rotating shaft is fixedly installed between the fixed blocks (606). A cam (607) is movably connected on the rotating shaft. The telescopic rod of the cylinder (604) is fixedly connected to the cam (607). Triangular protrusions are provided at the bottom of the movable plate (601) at the front and back. The triangular protrusions are in clearance fit with the triangular groove (603).

2. The molding sand rain shower device for casting production according to claim 1, characterized in that, A square protrusion (101) is provided in the center of the front and rear outer walls of the sand filling box (1). The square protrusion (101) is used to support the guide rail (202) and, in conjunction with the action of the cylinder (3), realizes the lifting and lowering of the sand filling box (1).

3. The molding sand rain shower device for casting production according to claim 1, characterized in that, The bottom of the sand box (1) is provided with a perforated plate (7) and a plurality of sand drop holes (701) are provided on the perforated plate (7). The sand drop holes (701) are used to evenly discharge sand from the rain-dried sand discharge area into the sand box.

4. The molding sand rain shower device for casting production according to claim 1, characterized in that, A mesh (501) is provided at the top of the circular through hole of the partition (5). The mesh (501) is used to filter large impurities and stones from the sand preparation area to the rain-dried sand discharge area.

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