Hand-operated wet clay sand pneumatic die sinking machine
By designing a pneumatically driven mold for hand-made wet clay sand molding, and using a cylinder to drive the mold core for automatic mold closing and demolding, the problems of sand box tilting and cumbersome operation in traditional hand-made wet clay sand molding are solved, achieving efficient and stable sand mold production, which is suitable for small and medium-scale casting production.
Patent Information
- Application Number
- CN202610327512.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-18
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional manual wet clay sand molding methods are prone to causing the sand box to tilt when the sand box is lifted vertically by hand to demold, which affects the quality of the sand mold. The operation is cumbersome and labor-intensive, making it difficult to adapt to the needs of efficient and automated production.
A manual wet clay sand pneumatic sprue mold is designed, which uses a cylinder to drive the mold core for automatic mold closing and demolding. Through precise component positioning and limiting structure, the mold core movement is ensured to be smooth, reducing the difficulty of operation for workers and improving the consistency and efficiency of sand molds.
It effectively avoids the problem of sand falling off the inner wall of the sand mold caused by the tilting of the sand box, reduces the scrap rate of castings, reduces the labor intensity of workers, improves the efficiency of sand mold making, and is suitable for small and medium-sized casting production.
Smart Images
Figure CN122076934A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of casting technology, specifically to a manual wet-molded clay sand pneumatic blowhole mold. Background Technology
[0002] In the casting production field, manual wet clay sand molding is a traditional and widely used method of sand mold making. It mainly relies on manual labor in conjunction with pneumatic blowhole molds to complete the sand mold forming operation. The specific operation process of manual wet clay sand molding is as follows: First, place the mold core on a smooth and flat stainless steel workbench, place the sand box tightly against the inside of the mold positioning pin, and fill the sand box with wet clay sand; then, use a tamping hammer to compact the wet clay sand in the sand box, and then use a scraper to scrape the clay sand that exceeds the top surface of the sand box; next, place the gating plate, and use a sprue bar to make a sprue along the round hole in the middle of the gating plate, then pull out the sprue bar and remove the gating plate; then, use a cylinder to introduce compressed air to drive the mold core downwards, completing the demolding action of the sand mold; finally, manually lift the sand box vertically, thus completing the entire clay sand mold making process.
[0003] However, the traditional manual wet-mold clay sand molding method described above has many drawbacks in practical applications, making it difficult to meet the demands of efficient and high-quality casting production. On the one hand, during the manual vertical lifting of the sand mold for demolding, the presence of the mold core necessitates keeping the sand mold vertical during manual operation. Uneven force can easily cause the sand mold to tilt, touching the mold core and resulting in sand falling off the inner wall of the mold. This severely affects the molding quality of the sand mold and may subsequently lead to defects such as sand inclusions and sand holes in the castings, reducing the casting yield. On the other hand, the demolding action between the mold core and the sand mold throughout the molding process requires manual force. The operation is cumbersome, labor-intensive, and prone to operator fatigue over long periods. This not only affects molding efficiency but may also further exacerbate sand mold quality problems due to human error, making it unsuitable for the trend of large-scale and automated production. Summary of the Invention
[0004] To address the aforementioned shortcomings of the prior art, this invention provides a manual wet clay sand pneumatic perforated mold to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a manual wet clay sand pneumatic sprue mold, comprising a base, a pair of side plates, a top plate, a sand-bearing plate, a cylinder, a support plate, a mold core, and a sprue core. The pair of side plates are vertically and parallelly arranged on the left and right sides of the base. The top plate is horizontally arranged on top of the pair of side plates. The sand-bearing plate is fixedly arranged on the upper surface of the top plate. The cylinder is fixedly arranged at the center of the upper surface of the base. The support plate is horizontally arranged and fixedly connected to the output end of the cylinder. The bottom surface of the top plate is provided with a limiting component that can vertically limit the support plate. The sprue core is fixedly arranged at the center of the upper surface of the top plate and protrudes from the sand-bearing plate. The mold core is fixedly arranged on the support plate. The top plate and the sand-bearing plate have openings corresponding to the positions of the mold core. The operation of the cylinder enables the mold core to move vertically within the openings.
[0006] Preferably, the sand receiving plate is provided with multiple positioning pins arranged in an L-shape for limiting the position of the subsequent sand box.
[0007] Preferably, the limiting component includes a guide post and a guide sleeve. The guide post is fixedly disposed on the lower bottom surface of the top plate, and the guide sleeve is fixedly disposed on the support plate. The guide sleeve is vertically slidably connected to the guide post.
[0008] Preferably, a pad is provided at the top of the telescopic end of the cylinder, and the support plate is fixedly connected to the pad by screws.
[0009] Preferably, a right-angle support groove is provided at the connection between the side plate and the top plate, and the end of the top plate rests in the right-angle support groove and is fixedly connected to the side plate by screws.
[0010] Preferably, a limit pin is screwed onto the pallet to limit the upward movement of the pallet.
[0011] This invention provides a handmade wet clay sand pneumatic perforated mold, which has the following beneficial effects: This invention optimizes the component connection structure and operation process of the mold, significantly reducing the technical skill requirements for workers. Sand mold making can be completed without workers possessing advanced operating skills. Through precise component positioning and stable core movement, the problem of sand falling off the inner wall of the sand mold caused by sand box tilting can be effectively avoided, improving sand mold quality and consistency, thereby reducing the scrap rate of castings. At the same time, the automatic mold closing and demolding of the core is achieved by cylinder drive, replacing the traditional manual demolding method, greatly reducing the labor intensity of workers, improving sand mold making efficiency, and better meeting the needs of small and medium-sized casting production. Attached Figure Description
[0012] Figure 1 This is a front sectional view of a manual wet clay sand pneumatic perforated mold according to the present invention; Figure 2This is a top view of a manual wet clay sand pneumatic perforated mold according to the present invention; Figure 3 This is a schematic diagram of a sand box on a manual wet clay sand pneumatic perforated mold according to the present invention.
[0013] In the diagram: 1. Mold core; 2. Sand receiving plate; 3. Top plate; 4. Side plate; 5. Base; 6. Pad block; 7. Support plate; 8. Guide sleeve; 9. Guide post; 10. Limit pin; 11. Sprue core; 12. Cylinder; 13. Positioning pin; 14. Right angle support groove; 15. Through port; 16. Sand box. Detailed Implementation
[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0015] The present invention will now be described in detail through specific embodiments, as follows: According to the instruction manual Figures 1-3As can be seen, during operation, the operator places the sand box 16 used for making the sand mold onto the sand support plate 2, with the mold core 1 enclosed within it. The sand support plate 2 may be equipped with multiple L-shaped positioning pins 13 for limiting the position of the sand box 16. The operator places the sand box 16 close to the positioning pins 13 to ensure accurate positioning and alignment with the mold core 1. The sand support plate 2 can be made of copper, preferably H62 brass, which offers advantages such as non-stick sand, smooth demolding, moderate hardness, wear resistance without damaging the sand mold, dimensional stability, low thermal deformation, excellent machinability, efficient mold making and repair, resistance to moisture corrosion, and suitability for humid working conditions. The positioning pins 13 can be fixed to the sand support plate 2 by welding or screwing. The operator controls the cylinder 12 on the base 5. The connection and use of the cylinder 12 are existing technologies. The telescopic end of the cylinder 12 drives the support plate 7 to move upward, thereby pushing the mold core 1 on the support plate 7 upward, passing through the opening 15 on the top plate 3 and the sand support plate 2. The part above the sand support plate 2 is the casting cavity. The bottom of the mold core 1 is tightly fitted to the support plate 7 and fixed by bolts or clips. The sprue core 11 is designed in the center of the top plate 3. During the design, the sprue core 11, the top plate 3, and the sand support plate 2 are all sealed with gaskets to prevent sand from entering the connection gap and affecting the molding quality. The operator evenly sprinkles a layer of quartz sand on the surface of the mold core 1 to prevent sticking and facilitate subsequent demolding; then fills the sand box 16 with wet clay sand and kneads the clay sand around the mold core 1 by hand to ensure that the mold core 1 and the sand are tightly fitted and to avoid gaps. Add another layer of wet clay sand on top of the sand mold 16, and tamp the sand mold twice with a tamping hammer to ensure the sand mold is dense and improve its strength. Then, use a scraper to level the clay sand that exceeds the top surface of the sand mold 16, making the top surface of the sand mold 16 flat. Place the sprue plate, making sure it fits against the top surface of the sand mold 16. Use a sprue bar to make a sprue run at the position of the central hole on the sprue plate. After removing the sprue bar, remove the sprue plate. Control the cylinder 12 again to retract the telescopic end of the cylinder 12, which will drive the support plate 7 and the mold core 1. The mold core 1 will be pulled out of the sand mold, and the sand mold will be demolded. Finally, the operator will lift the sand mold 16 vertically to separate it from the sprue core 11, thus completing the production of the entire clay sand mold. Through the precise connection and reasonable arrangement of the above-mentioned components, the overall assembly of the mold is completed. The components work together to ensure smooth movement of the mold core 1 and accurate positioning of the sand box 16, providing stable and reliable equipment support for subsequent sand mold production. This invention optimizes the component connection structure and operation process of the mold, adopting a mold core 1 detachment method. Sand mold production can be completed without requiring highly skilled operators. Precise component positioning and smooth movement of the mold core 1 effectively avoid sand falling off the inner wall of the sand mold caused by tilting of the sand box 16, improving sand mold quality and consistency, thereby reducing the scrap rate of castings. Simultaneously, the automatic mold core 1 closing and demolding is achieved through cylinder 12, replacing the traditional manual demolding method, significantly reducing the labor intensity of workers, improving sand mold production efficiency, and better meeting the needs of small and medium-scale casting production.
[0016] The limiting components include guide pillars 9 and guide sleeves 8. The guide pillars 9 are fixedly installed on the bottom surface of the top plate 3, and the guide sleeves 8 are fixedly installed on the support plate 7. The guide sleeves 8 and the guide pillars 9 are vertically slidably connected. When the cylinder 12 drives the support plate 7 to move vertically, it ensures the stability of the vertical movement of the support plate 7 and improves the quality of the sand mold during demolding.
[0017] The cylinder 12 has a pad 6 at the top of its telescopic end, and the support plate 7 is fixedly connected to the pad 6 with screws. The support plate 7 and the mold core 1 on the support plate 7 can be disassembled to replace different mold cores 1. Of course, the connection between the side plate 4 and the top plate 3 is provided with a right-angle support groove 14, and the end of the top plate 3 rests in the right-angle support groove 14 and is fixedly connected to the side plate 4 with screws. It can also be disassembled to replace the through-hole 15 that matches the mold core 1.
[0018] In addition, a limit pin 10 is screwed onto the pallet 7. Depending on the different protruding heights of the mold core 1, the limit pins 10 of different lengths are used to limit the upward movement of the pallet 7, making the position of the mold core 1 more accurate.
[0019] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A manual wet-type clay sand pneumatic perforated mold, characterized in that, The system includes a base (5), a pair of side plates (4), a top plate (3), a sand-bearing plate (2), a cylinder (12), a support plate (7), a mold core (1), and a sprue core (11). The pair of side plates (4) are vertically and parallel to each other on the left and right sides of the base (5). The top plate (3) is horizontally positioned on top of the pair of side plates (4). The sand-bearing plate (2) is fixedly positioned on the upper surface of the top plate (3). The cylinder (12) is fixedly positioned at the center of the upper surface of the base (5). The support plate (7) is horizontally positioned and parallel to the top plate (4). The output end of the cylinder (12) is fixedly connected. The bottom surface of the top plate (3) is provided with a limiting component and can vertically limit the support plate (7). The sprue core (11) is fixedly set at the center position of the upper surface of the top plate (3) and protrudes from the sand-bearing plate (2). The mold core (1) is fixedly set on the support plate (7). The top plate (3) and the sand-bearing plate (2) are provided with openings (15) corresponding to the position of the mold core (1). The operation of the cylinder (12) can make the mold core (1) move vertically in the opening (15).
2. The hand-made wet clay sand pneumatic perforated mold according to claim 1, characterized in that, The sand receiving plate (2) is provided with multiple positioning pins (13) arranged in an L-shape, which are used to limit the subsequent sand box (16).
3. The handmade wet clay sand pneumatic perforated mold according to claim 1, characterized in that, The limiting component includes a guide post (9) and a guide sleeve (8). The guide post (9) is fixedly installed on the bottom surface of the top plate (3), and the guide sleeve (8) is fixedly installed on the support plate (7). The guide sleeve (8) and the guide post (9) are vertically slidably connected.
4. The hand-made wet clay sand pneumatic perforated mold according to claim 1, characterized in that, A pad (6) is provided on the top of the telescopic end of the cylinder (12), and the support plate (7) is fixedly connected to the pad (6) by screws.
5. A hand-made wet clay sand pneumatic perforated mold according to claim 1, characterized in that, A right-angle support groove (14) is provided at the connection between the side plate (4) and the top plate (3). The end of the top plate (3) rests in the right-angle support groove (14) and is fixedly connected to the side plate (4) by screws.
6. A hand-made wet clay sand pneumatic perforated mold according to claim 1, characterized in that, A limit pin (10) is screwed onto the pallet (7) to limit the upward movement of the pallet (7).