A sealed sand-collecting horizontal core shooter

Abstract

This utility model discloses a sealed sand-collecting horizontal core shooter, including a base. Above the base are an opening and closing mold worktable, a steel plate protective cover, and columns. A mold mounting beam and a rotating sand-slip plate assembly are located between the sides of the columns. A sand-collecting trolley is located below the rotating sand-slip plate assembly. An upper beam is located above the columns, surrounded by a sealed enclosure. A double-opening sliding door is located in front of the sealed enclosure, and an exhaust outlet and a sand-collecting trolley inlet / outlet are located behind the sealed enclosure. A sand-shooting head assembly and a top hole assembly are located below the upper beam. A cylinder scraping assembly is located on one side of the sand-shooting head assembly. This utility model enables fully sealed production, effectively collecting harmful exhaust gases and residual sand, improving production stability and equipment lifespan.

Description

Technical Field

[0001] This utility model relates to the field of sand core production technology, and in particular to a closed sand-collecting horizontal core shooter. Background Technology

[0002] In the foundry industry, horizontal core shooters are a key piece of equipment widely used in the manufacture of sand cores. Their working principle involves injecting a resin-coated sand mixture, such as coated sand, at high speed through a shooting head into a heated core mold. The heat of the mold solidifies the resin on the sand surface, forming a sand core with a specific shape and strength. Currently, mainstream core shooter equipment on the market suffers from two significant technical defects in practical applications, seriously affecting the production environment, equipment reliability, and operator health: First, the problem of exhaust gas and dust dispersion. Existing equipment mostly adopts an open or semi-open structural design. During sand shooting and core solidification, the resin decomposes under heat, producing a large amount of irritating fumes containing phenolic compounds. These high-temperature exhaust gases easily escape disorderly from mold seams, mold opening stations, and equipment gaps into the workshop, leading to a deterioration of the production environment. When multiple machines are concentrated in one location, the accumulation of exhaust gases in the workshop is particularly serious, posing a long-term threat to the respiratory health of operators and violating increasingly stringent environmental protection and occupational health and safety regulations. Second, the problem of collecting residual and loose sand. After sand injection, some loose sand usually remains on the parting surface of the injection head and mold. Existing equipment often relies on manual scraping for cleaning, which is inefficient and creates a harsh working environment. Even when some equipment uses mechanical scraping devices, the scraped sand lacks effective sealed collection methods and usually falls directly onto the equipment platform or the ground. This loose sand is easily blown up by airflow during subsequent cleaning and core removal operations, causing dust pollution. More seriously, the scattered sand particles may intrude into precision parts such as linear guides and transmission mechanisms, accelerating wear and tear, leading to decreased equipment operating accuracy, increased failure rate, and severely affecting production stability and equipment lifespan. Utility Model Content

[0003] The purpose of this invention is to provide a closed-loop sand-collecting horizontal core shooter. This invention enables fully enclosed production, effectively collects harmful waste gases and residual sand, and improves production stability and equipment lifespan.

[0004] The technical solution of this utility model is as follows: A sealed sand-collecting horizontal core shooter includes a base, an opening and closing mold worktable, a steel plate protective cover, and a column above the base; a mold mounting beam and a rotating sand-slipping plate assembly are provided between the sides of the column; a sand-collecting trolley is provided below the rotating sand-slipping plate assembly; an upper beam is provided above the column, and a sealed enclosure is provided around the upper beam; a double-opening sliding door is provided in front of the sealed enclosure, and an exhaust gas outlet and a sand-collecting trolley inlet and outlet are provided behind the sealed enclosure; a sand-shooting head assembly and a top hole assembly are provided below the upper beam; a cylinder scraping assembly is provided on one side of the sand-shooting head assembly.

[0005] The aforementioned enclosed sand-collecting horizontal core shooter has two linear slide rails on its base, and the mold opening and closing worktable and steel plate protective cover are mounted on the linear slide rails; one side of the steel plate protective cover is connected to the mold opening and closing worktable, and the other side is connected to the front fixed end of the base.

[0006] The aforementioned enclosed sand-collecting horizontal core shooting machine has a lifting hydraulic cylinder below the mold opening and closing worktable and a fast mold changing mechanism assembly above the mold opening and closing worktable.

[0007] The aforementioned enclosed sand-collecting horizontal core shooter has four columns above the base, and a crossbeam mounting seat on the side of each column. The lower surface of the crossbeam mounting seat is the mounting surface of the mold mounting crossbeam. The mold mounting crossbeam has a transverse waist hole inside, below which the mold is installed.

[0008] The aforementioned closed sand-collecting horizontal core shooter includes a sand-collecting plate assembly comprising a sand-collecting plate, a rotary cylinder, and a bearing with a mounting seat. The two sides of the sand-collecting plate are respectively connected to the rotary cylinder and the bearing with a mounting seat.

[0009] The aforementioned closed sand-collecting horizontal core shooter includes a sand-collecting trolley comprising a trolley body assembly and a collection frame, wherein the upper opening of the collection frame is flared out; the trolley body assembly is equipped with rollers and handrails.

[0010] The aforementioned closed sand-collecting horizontal core shooter has an air tank, a sand-shooting hydraulic cylinder, and a sand hopper above the upper beam, with the sand hopper located directly above the sand-collecting trolley.

[0011] The aforementioned sealed sand-collecting horizontal core shooter includes a front enclosure, two side enclosures, and a rear enclosure; the double sliding door is located on the front enclosure, with an opening door with an electrical control button and an observation port on the left side and an opening door with an observation port on the right side.

[0012] The aforementioned sealed sand-collecting horizontal core shooter has an exhaust gas outlet located directly above the rear enclosure, a double door below it, and opening and closing doors on both sides. The sand-collecting trolley inlet and outlet are located at the sand-collecting trolley's entry and exit points.

[0013] In the aforementioned enclosed sand-collecting horizontal core shooter, the sand-shooting head assembly and the top hole assembly are arranged on the track below the upper beam, and the cylinder sand-scraping assembly is located on one side of the sand-shooting head assembly to scrape off residual sand and guide it to the rotating sand-slip plate assembly.

[0014] Compared with existing technologies, this utility model constructs a completely sealed working space by setting a sealed enclosure structure around the upper beam, including front sliding doors, side and rear enclosures, and opening an exhaust gas outlet at the top of the rear enclosure. This completely confines harmful fumes and dust generated in various processes such as sand shooting, curing, and mold opening within the equipment. An external dust removal system centrally extracts and treats the exhaust gas, fundamentally solving the problem of unorganized fume dispersion, improving the workshop working environment, protecting the health of operators, and meeting environmental protection requirements. This utility model uses a collaborative collection system composed of a cylinder scraping assembly, a rotating sand chute assembly, and a sand collection trolley to automate the cleaning and collection of residual sand. The residual sand scraped off by the scraping assembly is precisely guided to the sand chute and automatically slides into the funnel-shaped collection frame of the sand collection trolley below by gravity. The entire process is completed in a sealed environment, effectively preventing residual sand from scattering and dust pollution around the equipment, maintaining the cleanliness of the equipment and the work site. This invention effectively prevents the escape of loose sand and dust, avoiding their intrusion into precision transmission and moving parts such as linear guide rails, lifting hydraulic cylinders, and bearing seats. This reduces the risk of jamming or damage to the mechanism due to sand abrasion, thus decreasing the equipment failure rate, ensuring stable and continuous production, extending the service life of key components, and lowering maintenance costs. The layout of this invention allows operators to monitor and perform main operations from a clean area outside the sealed door, opening the door only when necessary for tasks such as mold raising / lowering and core removal. The sand collection trolley can be easily pulled out for cleaning, enabling operation without stopping the machine. This design ensures both airtightness and ease of operation and maintenance, achieving a balance between safety and convenience. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a left view of the overall structure of the present invention; Figure 3 This is a rear view of the overall structure of the present invention; Figure 4 This is a schematic diagram of the unpacked internal structure of the present invention.

[0016] Reference numerals: 1. Base; 2. Mold opening and closing worktable; 3. Steel plate protective cover; 4. Column; 5. Mold mounting beam; 6. Rotary sand chute assembly; 7. Sand collecting trolley; 8. Upper beam; 9. Sealed enclosure; 10. Double-opening sliding door; 11. Exhaust gas outlet; 12. Sand collecting trolley inlet and outlet; 13. Sand injection head assembly; 14. Top hole assembly; 15. Cylinder sand scraping assembly; 16. Linear slide rail; 17. Lifting hydraulic cylinder; 18. Quick mold changing mechanism assembly; 19. Mold beam mounting seat; 20. Mold; 21. Sand chute; 22. Rotary cylinder; 23. Bearing with seat; 24. Trolley body assembly; 25. Collection frame; 26. Air tank; 27. Sand injection hydraulic cylinder; 28. Sand hopper; 29. ​​Front enclosure; 30. Side enclosure; 31. Rear enclosure. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0018] Example: A sealed sand-collecting type horizontal core shooter, such as Figure 1-4As shown, the system includes a base 1, which is an integral load-bearing structure made of welded steel plate. Two parallel linear slide rails 16 are machined on the upper surface (the spacing between the slide rails matches the bottom slider of the mold-opening / closing worktable 2 to ensure smooth movement). The mold-opening / closing worktable 2 is located above the base 1 and rests on the linear slide rails 16, allowing it to move back and forth along the rails (to allow the mold to enter and exit the equipment). A lifting hydraulic cylinder 17 is fixed below the mold-opening / closing worktable 2 via a flange (the cylinder body is welded to the inside of the base 1, and the piston rod extends and retracts to drive the worktable up and down, adjusting the height of the mold 20). A quick mold-changing mechanism assembly 18 is bolted to the top of the mold-opening / closing worktable 2. This assembly includes quick clamps and positioning pins, enabling mold assembly and disassembly within 3 minutes, improving mold-changing efficiency. A steel plate protective cover 3 is located above the base 1. One side of the steel plate protective cover 3 is welded to the side of the mold-opening / closing worktable 2, and the other side is bolted to the front fixed end of the base 1. This cover shields the slide rail area as the worktable moves, preventing residual sand from falling into the slide rails and affecting movement accuracy. The base 1 has four vertically welded columns 4 at its four corners. The columns 4 are made of seamless steel pipe to ensure load-bearing strength, thus forming the vertical frame of the equipment. Each column 4 has a mold beam mounting seat 19 welded to its side. The lower surfaces of the four beam mounting seats are milled to ensure they are on the same horizontal plane, providing a reference for the mold mounting beam 5. The mold mounting beam 5 is fixed to the beam mounting seat 19 with horizontal bolts. Mold mounting holes are reserved below the mold mounting beam 5. Horizontal waist holes are opened inside the mold mounting beam 5 (the length of the waist holes is adapted to molds of 100-500mm specifications, and can be adjusted by the bolt position to adapt to the fixing requirements of different molds 20). The mold 20 is installed below the mold mounting beam 5 and cooperates with the lower mold on the mold opening and closing worktable 2 to form a cavity. A rotating sand-slipping plate assembly 6 is installed between the sides of the column 4. The rotating sand-slipping plate assembly 6 consists of a sand-slipping plate 21 (made of stainless steel, with a polished surface to reduce sand residue), a rotating cylinder 22 (a double-acting cylinder with a stroke of 50mm), and a seated bearing 23 (a deep groove ball bearing to ensure smooth rotation of the sand-slipping plate). The two ends of the sand-slipping plate 21 are welded to the output shaft of the rotating cylinder 22 and the inner ring of the seated bearing 23, respectively. The rotating cylinder 22 can drive the sand-slipping plate 21 to rotate to fit the side of the mold 20 (sand receiving angle of 60° to ensure smooth sliding of floating sand). A sand collecting trolley 7 is installed on the lower side of the rotating sand conveyor assembly 6. The sand collecting trolley 7 consists of a trolley body assembly 24 (welded from cold-rolled steel plates) and a collection frame 25 (with a flared upper opening, the opening size of which is 100mm larger than the end of the sand conveyor to prevent sand leakage). The bottom of the trolley body assembly 24 is equipped with polyurethane rollers (quiet and wear-resistant), and steel pipe handrails are welded to the side. It can enter and exit the equipment through the rear sand collecting trolley inlet and outlet 12 for convenient transfer of residual sand. The top of the column 4 is fixed to the upper beam 8 by bolts. The upper beam 8 adopts a box-shaped steel structure with internal stiffening plates to enhance rigidity.Above the upper beam 8, an air tank 26, a sand-shooting hydraulic cylinder 27, and a sand hopper 28 are installed sequentially. The air tank 26 stores high-pressure gas at a pressure of 0.6-0.8 MPa, providing power for sand shooting. The sand-shooting hydraulic cylinder 27 is a single-acting hydraulic cylinder with a maximum thrust of 50 kN, driving the sand-shooting head to press down and seal. The sand hopper 28 has a volume of 500 L, is made of stainless steel, and has a pneumatic discharge valve at the bottom, located directly above the sand collection trolley 7, supplying sand to the sand-shooting head. The sand-shooting head assembly 13 is slidably mounted on the track below the upper beam 8. The top of the sand-shooting head assembly 13 is connected to the piston rod flange of the sand-shooting hydraulic cylinder 27, and has an internal sand-shooting chamber to adapt to different mold sand-shooting nozzle sizes. The side of the sand-shooting head assembly 13 closest to the mold is bolted with a cylinder scraper assembly 15. The cylinder scraper assembly 15 is a single-acting cylinder-driven scraper plate made of nylon to avoid scratching the surface of the sand-shooting head. A top hole assembly 14 is slidably mounted on the track below the upper beam 8. The top hole assembly 14 can slide to the top of the mold, and multiple sets of ejector pins are installed at the bottom (the number of ejector pins matches the number of top holes in the mold) for ejection and demolding after the sand core has solidified. The upper beam 8 is surrounded by a sealed enclosure 9, which consists of a front enclosure 29, two side enclosures 30, and a rear enclosure 31, all made of 1.5mm cold-rolled steel plate with a powder-coated anti-rust finish. The front enclosure 29 is equipped with a double sliding door 10, which is a double-leaf sliding door with a track design for smooth opening and closing. The left door of the front enclosure 29 integrates electrical control buttons (including start, emergency stop, and workstation switching keys) and a transparent observation window. The transparent observation window is made of tempered glass, heat-resistant to 200℃, for easy observation of the sand-shooting process. The right door of the front enclosure 29 only has an observation window. The two side enclosures 30 are symmetrically equipped with hinged doors that can open outwards by 90° for easy maintenance of internal components. The rear enclosure 31 has an exhaust gas outlet 11 with a diameter of 150mm, which can be connected to an external dust removal pipe for negative pressure exhaust of exhaust gas. The rear enclosure 31 has a double door (opened when maintaining the mold) at the bottom, and sand collection trolley inlet and outlet 12 are reserved on both sides. The width of the sand collection trolley inlet and outlet 12 matches the sand collection trolley, and the height is 1.2m.

[0019] Working principle Pour coated sand (50-100 mesh) into sand hopper 28, open the pneumatic valve at the bottom of the sand hopper, and confirm that the discharge is unobstructed; operate the control button, the sand injection head assembly 13 moves along the track to directly below the sand hopper 28, the sand hopper discharge valve opens, and sand is added into the sand injection head (the amount of sand added is set according to the sand core volume and controlled by the liquid level sensor). After adding sand, the valve is closed, and the sand injection head moves back to the sand injection position; move the mold opening and closing worktable 2 to the outside of the equipment, and use the quick mold changing mechanism assembly 18 to install the mold. The lower mold is fixed on the worktable; the worktable moves back inward along the linear slide rail 16, the piston rod of the lifting hydraulic cylinder 17 extends, pushing the worktable upward, so that the lower mold fits against the upper mold below the mold mounting beam 5, and the bolts are tightened to secure the mold; the rotary cylinder 22 is activated, and the sand-slide plate 21 flips to fit against the side of the mold; the piston rod of the sand-shooting hydraulic cylinder 27 extends, pushing the sand-shooting head assembly 13 downward to seal against the sand-shooting port of the mold; high-pressure gas (pressure 0.7MPa) is connected to the air tank 26. Gas is blown into the sand-shooting head, and the coated sand is pressed into the mold cavity. After holding the pressure for 5 seconds, the gas is cut off. The sand-shooting hydraulic cylinder 27 retracts, and the sand-shooting head moves back below the sand hopper 28. The air cylinder scraping assembly 15 is activated, and the scraper extends to clean the floating sand on the surface of the sand-shooting head. The floating sand slides down the sand chute 21 to the collection frame 25 of the sand collection cart 7. The electrical control cabinet starts the timer (curing time 2 minutes, adjusted according to the type of coated sand), and the coated sand in the mold is heated and cured. After curing, the top hole assembly 14 moves to the mold cavity. Directly above the mold; the sand-shooting hydraulic cylinder 27 extends, pushing the top hole assembly downwards, and the ejector pin ejects the sand core; at the same time, the lifting hydraulic cylinder 17 retracts, the worktable descends, and the upper and lower molds separate; the mold opening and closing worktable 2 moves to the outside of the equipment, and the operator opens the lower mold and removes the formed sand core; when the residual sand in the sand collecting trolley 7 reaches 2 / 3 of the collection frame volume, the handle is pulled to move the trolley out of the sand collecting trolley inlet and outlet 12, and the residual sand is poured into the waste sand area; the trolley is pushed back to its original position and enters the next cycle.

[0020] The above description is merely a specific embodiment of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A closed sand-type horizontal core shooter comprising a base (1), characterized in that: The base (1) is provided with an opening and closing mold workbench (2), a steel plate protective cover (3) and a column (4) above it; a mold installation crossbeam (5) and a rotating sand-slipping plate assembly (6) are provided between the sides of the column (4); a sand-collecting trolley (7) is provided below the side of the rotating sand-slipping plate assembly (6); an upper beam (8) is provided above the column (4), and a sealed enclosure (9) is provided around the upper beam (8). A double sliding door (10) is provided in front of the sealed enclosure (9), and an exhaust gas outlet (11) and a sand-collecting trolley inlet and outlet (12) are provided behind the sealed enclosure (9); a sand-shooting head assembly (13) and a top hole assembly (14) are provided below the upper beam (8); a cylinder scraping assembly (15) is provided on one side of the sand-shooting head assembly (13).

2. The closed-set sand-type horizontal core shooter of claim 1, wherein: The base (1) is provided with two linear slide rails (16), the mold opening and closing worktable (2) and the steel plate protective cover (3) are set on the linear slide rails (16); one side of the steel plate protective cover (3) is connected to the mold opening and closing worktable (2), and the other side is connected to the front fixed end of the base (1).

3. The closed-set sand-type horizontal core shooter of claim 2, wherein: The opening and closing mold worktable (2) is provided with a lifting hydraulic cylinder (17) below it and a fast mold changing mechanism assembly (18) above it.

4. The closed-set sand-type horizontal core blaster of claim 1, wherein: The base (1) has four columns (4) on top, and the columns (4) have a crossbeam mounting seat (19) on the side. The lower surface of the crossbeam mounting seat (19) is the mounting surface of the mold mounting crossbeam (5). The mold mounting crossbeam (5) has a transverse waist hole inside, and the bottom of it is used to install the mold (20).

5. The closed-set sand-type horizontal core blaster of claim 1, wherein: The rotating sand-slip plate assembly (6) includes a sand-slip plate (21), a rotating cylinder (22), and a seated bearing (23). The two sides of the sand-slip plate (21) are respectively connected to the rotating cylinder (22) and the seated bearing (23).

6. The closed-set sand-type horizontal core blaster of claim 1, wherein: The sand collection trolley (7) includes a body assembly (24) and a collection frame (25), the upper opening of which is flared; the body assembly (24) is provided with rollers and handrails.

7. The sealed sand-collecting horizontal core shooter according to claim 1, characterized in that: An air tank (26), a sand-shooting hydraulic cylinder (27), and a sand bucket (28) are provided above the upper beam (8), with the sand bucket (28) located directly above the sand-collecting trolley (7).

8. The closed-set sand-type horizontal core blaster of claim 1, wherein: The sealed enclosure (9) includes a front enclosure (29), two side enclosures (30) and a rear enclosure (31); the double sliding door (10) is located on the front enclosure (29), with an opening door with an electrical control button and an observation port on the left side and an opening door with an observation port on the right side.

9. The closed-set sand-type horizontal core blaster of claim 8, wherein: The exhaust gas outlet (11) is located directly above the rear enclosure (31), with a double door below it and opening and closing doors on both sides. The sand collection trolley inlet and outlet (12) are located at the entrance and exit position of the sand collection trolley (7).

10. The closed-set sand-type horizontal core blaster of claim 1, wherein: The sand-shooting head assembly (13) and the top hole assembly (14) are arranged on the track below the upper beam (8), and the cylinder sand-scraping assembly (15) is located on one side of the sand-shooting head assembly (13) for scraping off residual sand and guiding it to the rotating sand-slipping plate assembly (6).

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