Environment-friendly automatic molding equipment for hub casting

Abstract

The invention discloses environment-friendly automatic molding equipment for hub casting, and belongs to the technical field of casting, the environment-friendly automatic molding equipment for hub casting comprises a mounting base, and three limiting strips are mounted on the mounting base; a supporting seat is arranged on the limiting strip; an insertion frame is mounted below the supporting seat; a sand box is arranged on the supporting seat; an evanescent mode is arranged in the sand box; a bracket is mounted on the mounting base; a driving motor is mounted on the side surface of the bracket; according to the full-automatic molding machine, full-process automation is achieved, the product quality and production consistency are remarkably improved, manual intervention is not needed in the whole molding process from automatic sand filling, automatic evanescent mode grabbing and placing to automatic multi-station switching and composite compaction, high automation is achieved, the labor intensity is greatly reduced, and more importantly, the production efficiency is greatly improved. And manual operation errors are eliminated, and the high consistency of the manufacturing quality of each sand mold is ensured, so that the rejection rate of final hub castings is remarkably reduced, and high-quality and high-efficiency stable production is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of casting, and particularly relates to an environment-friendly automatic molding equipment for wheel hub casting. BACKGROUND

[0002] Casting is a molding method of pouring liquid metal into a specific shape of a cavity (mold) and obtaining a part or blank after cooling and solidification. For a wheel hub, it is to pour molten aluminum alloy liquid into a "wheel hub-shaped sand mold" or "metal mold", and obtain a wheel hub blank after cooling, and then the blank is processed into a finished product.

[0003] In the field of wheel hub manufacturing, casting is one of the mainstream production processes, and sand mold manufacturing is a key link in the casting process, and its quality and efficiency directly determine the quality and production cost of the final wheel hub. The traditional sand mold molding equipment, especially for the sand mold of a complex structure wheel hub, usually involves two or more kinds of sand with different properties in the molding process, such as mold sand for forming the surface of the cavity and filling sand for filling the back.

[0004] In the prior art, the supply and filling of the two kinds of sand generally use a split feeding system. Specifically, the equipment needs to configure independent storage bins, conveying pipelines and feeding devices for the mold sand and the filling sand. During the sand mold molding process, the operator or the control system needs to first inject one kind of sand (such as filling sand), and then switch the equipment to change the other kind of sand (such as mold sand) for subsequent filling after it is filled to a certain height.

[0005] However, this traditional step-by-step and equipment-separated operation mode has the following significant technical bottlenecks: Low production efficiency and slow rhythm: the switching of the equipment, the switching of the pipeline and the sequential injection of different sands not only increase a large amount of non-productive auxiliary time, but also seriously slow down the manufacturing rhythm of a single sand mold, which cannot meet the strict requirements of modern mass production on efficiency.

[0006] Poor sand mold precision and consistency: the step-by-step filling cannot guarantee the flatness and bonding strength of the interface between the two kinds of sand. When filling the second kind of sand, the previously laid first layer of sand may be disturbed or impacted, resulting in deviation of the cavity size and uneven density inside the sand mold. This undesirable molding state will eventually reduce the dimensional accuracy and surface quality of the casting.

[0007] Low automation and integration: the separated feeding system increases the complexity and control difficulty of the equipment, which is not conducive to the automation and intelligent management of the whole process, and also increases the equipment floor space and maintenance cost.

[0008] Therefore, the present application designs an environment-friendly automatic molding equipment for wheel hub casting to solve the above problems. SUMMARY

[0009] The present application aims at providing an environmentally-friendly automatic molding equipment for wheel hub casting to solve the problems in the background art.

[0010] To achieve the above object, the present application adopts the following technical scheme: An environmentally-friendly automatic molding equipment for wheel hub casting, comprising a mounting base, three limiting strips are mounted on the mounting base; a supporting seat is arranged on the limiting strip; a plug-in frame is mounted below the supporting seat; a sand box is arranged on the supporting seat; a lost foam is arranged in the sand box; a bracket is mounted on the mounting base; a drive motor is mounted on the side surface of the bracket; a third gear is fixedly connected to the output shaft of the drive motor; a side plate is mounted on the side surface of the bracket; a rotating disc is rotatably connected to the side plate through a bearing; a gear ring meshing with the third gear is mounted outside the rotating disc; a first connecting disc, a second connecting disc and a third connecting disc are installed through the rotating disc; a compaction mechanism is connected through the first connecting disc; a surrounding barrier mechanism is connected through the second connecting disc; a sand blasting mechanism is mounted outside the surrounding barrier mechanism; a tamping mechanism is mounted below the second connecting disc; a material laying mechanism is mounted on the third connecting disc; and a mechanical gripper is mounted on the mounting base.

[0011] Further description of the above technical scheme: The compaction mechanism comprises a first electric hydraulic rod; the first electric hydraulic rod is mounted below the first connecting disc; an intermediate seat is fixedly connected to the bottom end of the first electric hydraulic rod; three guide rods are fixedly connected to the intermediate seat; the guide rods are slidingly connected to the first connecting disc; three second electric hydraulic rods are mounted below the intermediate seat; a pressing ring is connected to the bottom end of the second electric hydraulic rod; three supporting rods are mounted below the intermediate seat; a pressing plate is mounted at the bottom end of the supporting rod, and the protrusions arranged on the outer arc surface of the pressing plate are located in the grooves arranged on the inner arc surface of the pressing ring.

[0012] Further description of the above technical scheme: The surrounding barrier mechanism comprises a third electric hydraulic rod; the third electric hydraulic rod is connected through the second connecting disc; a surrounding cylinder is fixedly connected to the bottom end of the third electric hydraulic rod.

[0013] Further description of the above technical scheme: The sandblasting mechanism includes a storage frame mounted on a cylindrical shell; a feeding pipe that passes through and connects to a second turntable is connected to the storage frame; a rotating ring is rotatably connected to the inner wall of the storage frame; a guide plate is mounted on the side of the rotating ring; a toothed groove is formed on the outer arc surface of the rotating ring; a second gear meshes in the toothed groove; the second gear is located in a hole formed on the side of the storage frame; a second motor is connected to the second gear; the second motor is mounted on the cylindrical shell; the inner arc surface of the storage frame is inclined; a first discharge pipe is connected to the inclined surface of the storage frame; a second discharge pipe is connected to the bottom of the storage frame.

[0014] As a further description of the above technical solution: The tamping mechanism includes a first motor and a fourth electro-hydraulic rod fixedly connected to a second connecting plate; a movable seat is fixedly connected to the bottom end of the fourth electro-hydraulic rod; a sliding hole is provided on the movable seat; a sliding connecting seat is slidably connected in the sliding hole; a pressure seat is installed under the sliding connecting seat; a pressure cylinder is installed under the movable seat; a connecting column is installed on the sliding connecting seat; a first gear is fixedly connected to the output shaft of the first motor; a gear plate meshes with the first gear; a pressing hole is provided on the gear plate; the connecting column is slidably connected in the pressing hole; a support bearing is installed on the inner arc surface of the gear plate; the support bearing is installed on the movable seat.

[0015] As a further description of the above technical solution: The surrounding tube is designed to be conical.

[0016] As a further description of the above technical solution: The bottom ends of both the pressure base and the pressure cylinder are designed to be arc-shaped.

[0017] As a further description of the above technical solution: The material spreading mechanism includes a material bucket and a third motor fixedly connected to a third connecting plate; the output shaft of the third motor is fixedly connected to a rotating shaft; the rotating shaft is rotatably connected inside the third connecting plate; an electromagnetic clutch is provided at the bottom end of the rotating shaft; a vertical rod is installed below the electromagnetic clutch; an extension rod is installed on the side of the rotating shaft; a brush plate is fixedly connected to the bottom end of the extension rod and the bottom end of the vertical rod; the bottom plate of the material bucket is a perforated plate, and a feeding pipe is connected to the material bucket.

[0018] As a further description of the above technical solution: The third connecting plate is also equipped with a fifth electro-hydraulic rod; a connecting cylinder is installed at the bottom end of the fifth electro-hydraulic rod.

[0019] As a further description of the above technical solution: The outer ring of the bottom wall of the material barrel is provided with oblique holes, the brush plate at the bottom of the extension rod corresponds to the oblique hole, and the brush plate at the bottom of the vertical rod corresponds to the vertical hole in the perforated plate.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: This invention innovatively designs a rotary disc driven by a drive motor, gears, and a gear ring, integrating the three core functions of sand spreading, sandblasting, and compaction into one unit. Through precise angle switching of the rotary disc, different workstations can quickly and automatically move to the top of the sand box, achieving seamless connection and rapid switching between different processes. This integrated design completely eliminates the cumbersome operation of repeatedly changing devices in traditional equipment, greatly shortening auxiliary time and significantly improving the overall production cycle and automation level. It also achieves step-by-step, controllable, and precise molding, ensuring the internal structure of the sand mold. To ensure the integrity of the mold, the control system of this equipment supports pausing and inserting key processes during the filling process. For example, after filling part of the sand, a mechanical gripper can precisely place the lost foam in a predetermined position before continuing the filling. This step-by-step and controllable operation method ensures that the lost foam is completely and evenly covered by the sand, avoiding model displacement or uneven filling caused by one-time filling, and laying a solid foundation for the subsequent formation of a precise and complete hub cavity. The integrated composite compaction function ensures the high strength and high precision of the sand mold. This equipment is equipped with a combination of compaction and tamping. The composite compaction mechanism can fully and uniformly vibrate and compact the filled molding sand and filler sand. The compacted sand mold has the following key advantages: Sufficient strength and hardness: It can effectively resist the enormous pressure of the molten metal during pouring, preventing cavity expansion or deformation and ensuring the dimensional accuracy of the wheel hub; Excellent surface stability: The hard and dense surface of the sand mold can strongly resist the erosion of the molten metal, fundamentally avoiding defects such as sand inclusions and sand adhesion caused by sand particles being drawn into the molten metal; Ideal permeability: Uniform compaction creates stable and unobstructed microporous channels between sand particles, facilitating air permeability. The large amount of gas generated during lost foam aeration is successfully discharged, preventing porosity defects. The entire process is fully automated, significantly improving product quality and production consistency. From automatic sand filling and automatic gripping and placement of lost foam, to automatic switching of multiple stations and composite compaction, the entire molding process requires no manual intervention and achieves a high degree of automation. This not only greatly reduces labor intensity, but more importantly, eliminates human error and ensures a high degree of consistency in the manufacturing quality of each sand mold, thereby significantly reducing the scrap rate of the final wheel hub casting and achieving stable production with high quality and high efficiency.

[0021] In this invention, the mechanism achieves vertical overall downward pressure through a fourth electro-hydraulic rod. Simultaneously, it innovatively drives multiple pressure seats to synchronously contract in the horizontal direction through the linkage of a first motor, a gear disc, and a sliding connecting seat. This composite motion of "vertical downward pressure + horizontal contraction" allows the pressure seats to actively adapt to the complex contours of the lost foam cavity, achieving dynamic compaction. It completely solves the fundamental problem that traditional fixed pressure seats cannot reach the inside of complex cavities or cause differences in compaction density due to uneven contact points. This ensures uniform and comprehensive compaction of key areas such as wheel hub spokes and heat dissipation holes, achieving precise zoned pressure application and guaranteeing the overall structural stability and local strength of the sand mold. This invention cleverly divides the compaction function into two collaborative parts: the pressure seats and the pressure cylinder. The pressure seats are responsible for concentrated and deep compaction of the molding sand inside the lost foam, while the pressure cylinder is responsible for compacting the molding sand outside the lost foam. Extensive, stable compaction, a zoned pressure design, ensures high density and strength in key areas of the final casting while maintaining the uniformity and stability of the entire sand mold structure. This prevents cracking or deformation caused by uneven stress, significantly improving the sand mold's density and surface quality, laying the foundation for high-quality casting. Through this adaptive, zoned compaction process, the sand mold achieves extremely high density and uniformity, resulting in three key advantages: resistance to molten metal pressure: The high-strength sand mold effectively resists the static pressure of the molten metal during pouring, preventing cavity expansion and ensuring the dimensional accuracy of the wheel hub; prevention of sand scouring and inclusion: The compact and hard sand mold surface strongly resists the scouring of molten metal, eliminating the risk of sand particles being drawn into the molten metal and forming inclusion defects; and improved casting surface finish: Uniform compaction makes the cavity surface smooth, directly improving the surface quality of the final wheel hub casting.

[0022] This invention abandons the traditional gravity-driven free-fall feeding method and innovatively utilizes the inherent viscosity of moist filling sand. A rotating brush actively and controllably pushes the filling sand onto the orifice plate. Only sand that is contacted by the brush and subjected to thrust can fall through the orifice plate. This non-gravity-driven feeding mechanism directly correlates the sand flow rate with the brush's rotation speed and pushing range, thus achieving precise control of the feeding rate. Furthermore, by controlling the brush's coverage area, it is possible to flexibly choose whether to feed from the center area or the entire area of ​​the orifice plate, achieving precise spreading in a specific area. This ensures the uniformity and high efficiency of the filling process, improving the initial quality of the sand mold. Traditional feeding ports are prone to clogging due to "arching" or "bridging," leading to feeding interruptions or uneven flow. This invention effectively breaks down these blockages through the continuous rotation and pushing of the brush. The internal bonding arch bridge of the filling sand ensures the continuity and smoothness of the feeding. At the same time, the rotation of the brush plate can evenly sweep the filling sand across the entire feeding area, avoiding the accumulation and unevenness caused by traditional point or line feeding. This ensures the flatness and uniformity of the filling sand in the sand box, creating ideal initial conditions for the subsequent compaction process. The mechanism is simplified and its reliability and flexibility are improved. The feeding mechanism does not require complex gates, valves or vibrators and other anti-clogging components. The structure is simpler, and the manufacturing cost and maintenance difficulty are lower. The connection and separation of the vertical rod and the rotating shaft are controlled by an electromagnetic clutch, which can flexibly select whether to operate the brush plate on one side or both sides to adapt to the needs of different sized sand boxes or different sand laying processes. This design makes the equipment highly adaptable to processes and flexible in operation, and can easily cope with diverse production tasks. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of an environmentally friendly automatic molding equipment for wheel hub casting proposed in this invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the support base of an environmentally friendly automatic molding equipment for wheel hub casting proposed in this invention; Figure 3 This is a three-dimensional cross-sectional view of the first connecting plate of an environmentally friendly automatic molding device for wheel casting proposed in this invention. Figure 4 This is a three-dimensional cross-sectional view of the second connecting plate of an environmentally friendly automatic molding device for wheel casting proposed in this invention. Figure 5 This invention proposes an environmentally friendly automatic molding device for wheel hub casting. Figure 4 Enlarged structural diagram of section A; Figure 6 This is a three-dimensional cross-sectional view of the moving seat of an environmentally friendly automatic molding equipment for wheel casting proposed in this invention. Figure 7This is a schematic diagram of the three-dimensional separation structure of the gear disc and connecting column in an environmentally friendly automatic molding device for wheel hub casting proposed in this invention. Figure 8 This is a three-dimensional cross-sectional view of the third connecting plate of an environmentally friendly automatic molding device for wheel hub casting proposed in this invention.

[0024] Legend: 1. Mounting base; 2. Support seat; 3. Sand box; 4. Insert frame; 5. Lost foam casting; 6. Mechanical gripper; 7. Bracket; 8. Side plate; 9. Drive motor; 10. Rotary disc; 11. First connecting disc; 12. Second connecting disc; 13. Third connecting disc; 14. Compaction mechanism; 141. First electro-hydraulic rod; 142. Intermediate seat; 143. Guide rod; 144. Second electro-hydraulic rod; 145. Pressure ring; 146. Support rod; 147. Pressure plate; 15. Enclosure mechanism; 151. Third electro-hydraulic rod; 152. Enclosure cylinder; 16. Tamping mechanism; 1601. Fourth electro-hydraulic rod; 1602. Moving seat; 1603. Pressure cylinder; 1604. Pressure seat; 1605. Sliding connecting seat; 1606. Sliding hole; 1607. Connecting... 1608. Connecting column; 1609. Gear plate; 1600. Extrusion hole; 1610. Support bearing; 1611. First gear; 1612. First motor; 17. Sandblasting mechanism; 171. Storage frame; 172. Feeding pipe; 173. Rotating ring; 174. Guide plate; 175. Gear groove; 176. Second gear; 177. Second motor; 179. First discharge pipe; 178. Second discharge pipe; 18. Material spreading mechanism; 181. Third motor; 182. Rotating shaft; 183. Material bucket; 184. Replenishing pipe; 185. Extension rod; 186. Electromagnetic clutch; 187. Vertical rod; 188. Brush plate; 189. Inclined hole; 19. Fifth electro-hydraulic rod; 20. Connecting cylinder; 21. Limiting strip; 22. Third gear; 23. Gear ring. Detailed Implementation 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.

[0025] Please see the appendix Figure 1 - Appendix Figure 8This invention provides a technical solution: an environmentally friendly automatic molding equipment for wheel hub casting, comprising a mounting base 1, on which three limiting strips 21 are mounted; a support seat 2 is provided on the limiting strips 21; an insert frame 4 is mounted under the support seat 2; a sand box 3 is provided on the support seat 2; a lost foam 5 is provided inside the sand box 3; a bracket 7 is mounted on the mounting base 1; a drive motor 9 is mounted on the side of the bracket 7; a third gear 22 is fixedly connected to the output shaft of the drive motor 9; a side plate 8 is mounted on the side of the bracket 7; the side plate 8 is rotatably connected via bearings. A rotating disk 10 is connected; a gear ring 23 that meshes with a third gear 22 is installed on the outside of the rotating disk 10; a first connecting disk 11, a second connecting disk 12, and a third connecting disk 13 are installed through the rotating disk 10; a compaction mechanism 14 is connected through the first connecting disk 11; a barrier mechanism 15 is connected through the second connecting disk 12; a sandblasting mechanism 17 is installed outside the barrier mechanism 15; a tamping mechanism 16 is installed below the second connecting disk 12; a material spreading mechanism 18 is installed on the third connecting disk 13; and a mechanical gripper 6 is installed on the mounting base 1.

[0026] When producing the sand mold for wheel hub design, the drive motor 9 drives the third gear 22 to rotate. The third gear 22 controls the rotation of the rotating disk 10 through the gear ring 23, thereby adjusting the sand-laying mechanism to be directly above the sand box 3. The material-laying mechanism 18 lays filling sand onto the support seat 2. Then, the drive motor 9 drives the third gear 22 to rotate, and the third gear 22 controls the rotation of the rotating disk 10 through the gear ring 23. The rotating disk 10 drives the sand-blasting mechanism 17 to be directly above the sand box 3, injecting molding sand into the sand box 3. Then, the drive motor 9 drives the third gear 22 to rotate, and the third gear 22 controls the rotation of the rotating disk 10 through the gear ring 23, adjusting the compaction mechanism 14 to be directly above the sand box 3. The compaction mechanism 14 and the tamping mechanism 16 vibrate and compact the molding sand. The process involves compaction, where a mechanical gripper 6 picks up the lost foam 5 and places it into the sand box 3. Then, molding sand is continuously injected, ensuring that the lost foam 5 is positioned within the sand box 3 and covered by molding sand. After sand mold production is complete, a forklift is used to remove the sand mold via a frame. This process is repeated to continuously produce sand molds. The three stations respectively perform compaction, filling sand injection, and molding sand injection. The overall operation efficiency is high, the manufacturing process is precise and efficient, and no manual operation is required. The compacted sand mold has sufficient strength to resist this pressure, preventing the cavity from expanding or deforming. Furthermore, the surface of the compacted sand mold is hard and can resist the scouring of molten metal, preventing sand particles from being drawn into the molten metal and forming sand inclusion defects. This reduces the scrap rate during the final wheel hub forming and ensures the manufacturing precision and efficiency of the molding equipment.

[0027] The lost foam 5 is made of expandable polystyrene. After the molding sand and filler sand are filled and formed, it is directly heated. The lost foam 5 will eventually vaporize and disappear, and a cavity is formed inside the molding sand. When using the sand mold, the lost foam 5 is heated to vaporize it, and the cavity shape required for the wheel hub is formed inside the molding sand. The raw material liquid for the wheel hub is injected into the cavity inside the sand mold for wheel hub casting.

[0028] The compaction mechanism 14 includes a first electro-hydraulic rod 141; the first electro-hydraulic rod 141 is installed under the first connecting plate 11; the bottom end of the first electro-hydraulic rod 141 is fixedly connected to an intermediate seat 142; three guide rods 143 are fixedly connected to the intermediate seat 142; the guide rods 143 are slidably connected to the first connecting plate 11; three second electro-hydraulic rods 144 are installed under the intermediate seat 142; the bottom end of the second electro-hydraulic rods 144 is connected to a pressure ring 145; three support rods 146 are installed under the intermediate seat 142; a pressure plate 147 is installed at the bottom end of the support rod 146, and the protrusion on the outer arc surface of the pressure plate 147 is located in the groove on the inner arc surface of the pressure ring 145.

[0029] When producing the sand mold for wheel hub design, filling sand is directly injected into the sand box 3 through the material spreading mechanism 18. Then, a layer of molding sand is laid on the filling sand and the protrusion of the support seat 2 through the sand blasting mechanism 17. After a layer of molding sand is laid on both the protrusion and the bottom of the support seat 2, the first electric hydraulic rod 141 and the second electric hydraulic rod 144 are controlled to move the pressure plate 147 and the pressure ring 145 downwards respectively, so that a stepped shape is formed between the pressure plate 147 and the pressure ring 145. This allows for the blasting of the molding sand laid on the support seat 2 and the filling sand. Compaction; When the molding sand is laid horizontally on the upper side of the lost foam, the first electric hydraulic rod is controlled to drive the pressure plate 147 and the pressure ring 145 to move downward synchronously. The pressure plate 147 and the pressure ring 145 work together to compact the molding sand on a horizontal plane. The pressure plate 147 and the pressure ring 145 can form a stepped shape or a plane, so that the compaction process can adapt to the shape of the wheel hub, making the compaction of the molding sand or filling sand more thorough and complete. To a certain extent, this ensures that the internal forming cavity of the final molding sand is more stable, thus ensuring better quality of wheel hub casting.

[0030] The enclosure mechanism 15 includes a third electro-hydraulic rod 151; the third electro-hydraulic rod 151 is connected through the second connecting plate 12; the bottom end of the third electro-hydraulic rod 151 is fixedly connected to the enclosure tube 152.

[0031] When producing the sand mold for wheel hub design, a layer of filling sand is directly laid on the support base 2 through the material laying mechanism 18, and then a layer of molding sand is injected into the sand box 3 through the sand blasting mechanism 17. At this time, the lost foam 5 is placed on the support base 2, and then the third electric hydraulic rod 151 is controlled to drive the casing 152 to move down into the molding sand. The casing 152 separates the space where the lost foam 5 is located from other spaces in the sand box 3. At this time, the molding sand is injected into the casing 152, making the molding sand filling the lost foam 5 more compact, while ensuring that the molding sand is smoothly and accurately filled on the surface of the lost foam 5, ensuring the accurate casting process of the sand box 3.

[0032] The sandblasting mechanism 17 includes a storage frame 171 mounted on the casing 152; a feeding pipe 172 is connected to the storage frame 171 and passes through the second turntable; a rotating ring 173 is rotatably connected to the inner wall of the storage frame 171; a guide plate 174 is mounted on the side of the rotating ring 173; a toothed groove 175 is opened on the outer arc surface of the rotating ring 173; a second gear 176 is meshed in the toothed groove 175; the second gear 176 is located in a hole opened on the side of the storage frame 171; a second motor 177 is connected to the second gear 176; the second motor 177 is mounted on the casing 152; the inner arc surface of the storage frame 171 is inclined; a first discharge pipe 179 is connected to the inclined surface of the storage frame 171; a second discharge pipe 178 is connected to the bottom of the storage frame 171.

[0033] When producing the sand mold for wheel hub design, a layer of filling sand is directly laid onto the support base 2 via the material spreading mechanism 18. Then, the drive motor 9 drives the third gear 22 to rotate. The third gear 22 controls the rotation of the rotating disk 10 via the gear ring 23. The rotating disk 10 moves the storage frame 171 to directly above the sand box 3, controlling the second motor 177 to work. The second motor 177 controls the rotation of the tooth groove 175, the rotating ring 173, and the guide plate 174 via the second gear 176. During the rotation of the guide plate 174, the molding sand in the storage frame 171 is pushed. The molding sand flows downward through the first and second discharge pipes, and settles on the upper side of the filling sand and the support base. A layer of molding sand is laid on the raised part of support 2. The first feeding pipe, which is set at an inclination, can guide the falling molding sand to the raised part at the center of support 2. The second feeding pipe, which is set at a vertical position, can make the molding sand fall into the sand box 3 evenly. The falling process of the molding sand is combined with the blocking of the surrounding cylinder 152 to inject the molding sand evenly and accurately between the lost foam 5 and the surrounding cylinder 152. The molding sand can be injected layer by layer between the lost foam 5 and the surrounding cylinder 152. The tamping mechanism 16 is used to compact the molding sand, making the molding sand more dense and stable after injection. This ensures the stability and accuracy of the sand mold to a certain extent, resulting in better quality of wheel hub casting.

[0034] The tamping mechanism 16 includes a first motor 1612 and a fourth electro-hydraulic rod 1601 fixedly connected to the second connecting plate 12. A movable seat 1602 is fixedly connected to the bottom end of the fourth electro-hydraulic rod 1601. A sliding hole 1606 is provided on the movable seat 1602. A sliding connecting seat 1605 is slidably connected in the sliding hole 1606. A pressure seat 1604 is installed under the sliding connecting seat 1605. A pressure cylinder 1603 is installed under the movable seat 1602. A connecting column 1607 is installed on the sliding connecting seat 1605. A first gear 1611 is fixedly connected to the output shaft of the first motor 1612. A gear 1608 is externally meshed with the first gear 1611. A pressing hole 1609 is provided on the gear 1608. The connecting column 1607 is slidably connected in the pressing hole 1609. A support bearing 1610 is installed on the inner arc surface of the gear 1608. The support bearing 1610 is installed on the movable seat 1602.

[0035] When producing the sand mold for wheel hub design, a layer of filling sand is directly laid onto the support base 2 via the material spreading mechanism 18. Then, the drive motor 9 drives the third gear 22 to rotate. The third gear 22 controls the rotation of the rotating disk 10 via the gear ring 23. The rotating disk 10 moves the storage frame 171 to directly above the sand box 3, controlling the second motor 177 to work. The second motor 177 controls the rotation of the toothed groove 175, the rotating ring 173, and the guide plate 174 via the second gear 176. During the rotation of the guide plate 174, the molding sand in the storage frame 171 is pushed. The molding sand flows downward through the first and second discharge pipes, laying a layer of molding sand on the upper side of the filling sand and the protruding part of the support base 2. Then, the fourth electric hydraulic rod 1601 is controlled to drive the pressure seat 1604 and the pressure cylinder 1603 to move downward. The pressure seat 1604 compacts the molding sand in the cavity of the lost foam 5, and the pressure cylinder 1603 compacts the molding sand between the lost foam 5 and the surrounding cylinder 152. At the same time, the first motor 1612 controls the first gear 1611 to drive the gear disc 1608 to rotate. The gear disc 1608 uses the extrusion hole 1609 to drive the connecting column 1607 and the sliding connecting seat 1605 to move. The sliding connecting seat 1605 moves in the sliding hole 1606 while driving the pressure seat 1604 to move. The pressure seats 1604 move closer to each other. After the pressure seat 1604 compacts the molding sand, it moves inward a certain distance. After multiple movements, the compaction area of ​​the molding sand in the lost foam 5 is larger, and the molding sand around the lost foam 5 is compacted more evenly and comprehensively, ensuring that the final density and stability of the sand mold is higher.

[0036] The circumferential tube 152 is designed to be conical.

[0037] The conical casing 152 increases the pressure of the filling sand injected on the outside on the molding sand on the inside, making the molding sand more compact and thus more stable after molding. In addition, the conical structure makes it easy to remove the casing 152 upwards from the molding sand.

[0038] The bottom ends of both the pressure base 1604 and the pressure cylinder 1603 are designed to be arc-shaped.

[0039] The bottom of the pressure seat 1604 and the pressure cylinder 1603 is designed as an arc. When the arc-shaped structure comes into contact with the molding sand, the arc extrusion of the molding sand is radial. When the molding sand is extruded by the pressure seat 1604 and the pressure cylinder 1603, it moves along the circumference of the arc, so that the molding sand is extruded and moves in multiple directions. This allows the corner gaps of the lost foam to be filled with molding sand, reduces dead corners of molding sand filling, and thus ensures that the final sand mold structure is denser and more stable.

[0040] The material spreading mechanism 18 includes a material hopper 183 and a third motor 181 fixedly connected to a third connecting plate 13; the output shaft of the third motor 181 is fixedly connected to a rotating shaft 182; the rotating shaft 182 is rotatably connected inside the third connecting plate 13; an electromagnetic clutch 186 is provided at the bottom end of the rotating shaft 182; a vertical rod 187 is installed below the electromagnetic clutch 186; an extension rod 185 is installed on the side of the rotating shaft 182; a brush plate 188 is fixedly connected to the bottom end of the extension rod 185 and the bottom end of the vertical rod 187; the bottom plate of the material hopper 183 is a perforated plate, and a feeding pipe 184 is connected to the material hopper 183.

[0041] Because the space between the casing 152 and the sand box 3 is relatively large, if the space between the casing 152 and the sand box 3 is to be filled with filler sand, the filler sand will fall evenly, resulting in an excess of filler sand on the upper part of the lost foam 5. When producing the sand mold for wheel hub shaping, the drive motor 9 drives the third gear 22 to rotate. The third gear 22 controls the rotation of the rotating disk 10 through the gear ring 23, thereby adjusting the third connecting disk 13 to be directly above the sand box 3. Then, the third motor 181 is controlled to rotate. The third motor 181 controls the rotation of the rotating shaft 182, and the rotating shaft 182 controls the rotation of the brush plate 188 through the extension rod 185. The brush plate 188 pushes the filling sand on the orifice plate to move. Because the filling sand is wet, the particles are sticky to each other. When the filling sand is not pushed, it remains stable and will not fall through the orifice plate automatically. The connection between the vertical rod 187 and the rotating shaft 182 is controlled by the electromagnetic clutch 186. The two brush plates 188 rotate at the same time, pushing the filling sand on the orifice plate to move and fall through the orifice plate into the sand box 3, realizing the filling sand injection process. The filling sand can be adjusted according to the part of the outer part of the orifice plate or the entire filling sand falls according to the part of the filling sand to be injected, so as to ensure the accuracy of the filling sand addition and injection process.

[0042] The third connecting plate 13 is also equipped with a fifth electro-hydraulic rod 19; a connecting cylinder 20 is installed at the bottom end of the fifth electro-hydraulic rod 19.

[0043] When producing the sand mold for wheel hub design, the drive motor 9 drives the third gear 22 to rotate. The third gear 22 controls the rotation of the rotating disk 10 through the gear ring 23, thereby adjusting the third connecting disk 13 to be directly above the sand box 3. Then, the third motor 181 is controlled to rotate, and the third motor 181 controls the rotation of the rotating shaft 182. The rotating shaft 182 controls the rotation of the brush plate 188 through the extension rod 185, pushing the filling sand through the perforated plate and into the sand box 3. Then, the fifth electric hydraulic rod 19 is controlled to extend, driving the connecting cylinder 20 to compact the filling sand between the side of the molding sand and the sand box 3. After injecting a layer of filling sand into this space, compaction is performed once. The filling sand is compacted layer by layer, so that the filling sand is squeezed and dense after injection, ensuring the overall density, thereby improving the stability of the sand mold and the precision of wheel hub processing.

[0044] The outer ring of the bottom wall of the material barrel 183 is provided with an inclined hole 189. The brush plate 188 at the bottom of the extension rod 185 corresponds to the inclined hole 189, and the brush plate 188 at the bottom of the vertical rod 187 corresponds to the vertical hole in the perforated plate.

[0045] The perforated plate is located directly above the lost foam 5. The filling sand falling through the holes of the perforated plate will fall directly onto the molding sand and will not be able to enter the space between the molding sand side and the sand box 3, which will affect the filling sand injection process. Therefore, the inclined hole 189 will guide and diffuse the falling filling sand. The filling sand will flow out downward in a diffused manner through the inclined hole 189 and fall into the space between the casing 152 and the sand box 3, filling this space. Therefore, the filling sand injection process is more flexible, precise and efficient.

[0046] Working principle and usage: First, the drive motor 9 is controlled to operate. The drive motor 9 controls the rotation of the rotating disk 10 through the third gear 22 and the gear ring 23, adjusting the third connecting disk 13 to be directly above the sand box 3. Then, the third motor 181 is controlled to rotate, which in turn controls the rotation of the rotating shaft 182. The rotating shaft 182 controls the rotation of the brush plate 188 through the extension rod 185. During the rotation of the brush plate 188, the filling sand on the perforated plate moves. The filling sand flows downward through the inclined hole 189 and falls outward in a diffused manner, landing in the recess of the support seat 2 inside the sand box 3 until a layer of filling sand is laid on the support seat 2. Then, the third motor 181 is controlled to operate. 1. When the operation stops, the drive motor 9 controls the rotating disk 10 to rotate through the third gear 22 and the gear ring 23, adjusts the first connecting disk 11 to be directly above the sand box 3, and controls the first electric hydraulic rod 141 to extend, driving the pressure plate 147 and the pressure ring 145 to move downward until the pressure plate 147 contacts the support seat 2. At this time, the first electric hydraulic rod 141 is controlled to stop working, and the second electric hydraulic rod 144 extends, driving the pressure ring 145 to move downward. The pressure ring 145 compacts a layer of filling sand on the support seat 2. Then, the second electric hydraulic rod 144 and the first electric hydraulic rod 141 are controlled to shorten, and the pressure ring 145 and the pressure plate 147 are controlled to move to the initial position. The drive motor 9 controls the rotation of the rotating disk 10 via the third gear 22 and the gear ring 23, adjusting the second connecting disk 12 to be directly above the sand box 3. Then, it controls the third electric hydraulic rod 151 to drive the surrounding cylinder 152 downward until the first feeding pipe moves below the pressure cylinder 1603. Then, it controls the second motor 177 to work. The second motor 177 controls the rotation of the tooth groove 175, the rotating ring 173, and the guide plate 174 via the second gear 176. During the rotation of the guide plate 174, it pushes the molding sand in the storage frame 171. The molding sand flows downward through the first and second feeding pipes and lays a layer of molding sand on the protrusions of the support base 2 and the filling sand. The second motor 177 is stopped, and the third electric hydraulic rod 151 is controlled to move the casing 152 upward to the initial position. The drive motor 9 controls the rotating disk 10 to rotate through the third gear 22 and the gear ring 23, adjusting the first connecting disk 11 to be directly above the sand box 3. The first electric hydraulic rod 141 is extended to move the pressure plate 147 and the pressure ring 145 downward until the pressure plate 147 compacts the molding sand on the support seat 2. Then the first electric hydraulic rod 141 is stopped, and the second electric hydraulic rod 144 is extended to move the pressure ring 145 downward, compacting a layer of molding sand on the support seat 2. Then, the mechanical gripper 6 clamps and removes the mold 5, placing it on the support base 2. Next, the drive motor 9, through the third gear 22 and gear ring 23, controls the rotating disk 10 to rotate, adjusting the second connecting disk 12 directly above the sand box 3. Then, the third electric hydraulic rod 151 is controlled to move the casing 152 downwards until its bottom end is inserted into the molding sand. Subsequently, the second motor 177 is controlled to operate, and the second motor 177, through the second gear 176, controls the rotation of the toothed groove 175, rotating ring 173, and guide plate 174. During the rotation of the guide plate 174, the storage frame is... The molding sand inside 171 is pushed and flows downward through the first and second feed pipes, falling into the interior of the casing 152 and outside the lost foam 5. After a layer of molding sand is laid on the lost foam 5, the fourth electro-hydraulic rod 1601 is extended. The fourth electro-hydraulic rod 1601 drives the pressure seat 1604 and pressure cylinder 1603 to move downward. The pressure seat 1604 squeezes the molding sand in the upper cavity of the lost foam 5, and the pressure cylinder 1603 squeezes the molding sand inside the casing 152. The arc-shaped bottom ends of the pressure seat 1604 and pressure cylinder 1603 cause radial compression of the molding sand. The process involves compacting the molding sand, then controlling the fourth electric hydraulic rod 1601 to move the pressure seat 1604 and pressure cylinder 1603 upwards to their initial positions. Next, the second motor 177 is controlled to operate, controlling the toothed groove 175, rotating ring 173, and guide plate 174 to rotate via the second gear 176. During the rotation of the guide plate 174, the molding sand in the storage frame 171 is pushed downwards through the first and second discharge pipes, continuing to lay a layer of molding sand on the lost foam 5. Then, the fourth electric hydraulic rod 1601 is controlled to move the pressure seat 1604 and pressure cylinder 1603 upwards to their initial positions. 604 and pressure cylinder 1603 move down to vibrate and compact the molding sand. At the same time, the first motor 1612 drives the first gear 1611 to rotate. The first gear 1611 drives the gear disk 1608 to rotate. The gear disk 1608 uses the extrusion hole 1609 to drive the connecting column 1607 and the sliding connecting seat 1605 to move. The sliding connecting seat 1605 moves in the sliding hole 1606 while driving the pressure seat 1604 to move. The pressure seats 1604 are in a contraction assembly. The pressure seats 1604, which can move horizontally and flexibly, compact the cavity on the lost foam 5 more evenly. Then, the process of laying and compacting molding sand is repeated until the molding sand forms a dense state inside the casing 152. At this time, the third electric hydraulic rod 151 and the fourth electric hydraulic rod 1601 are shortened, driving the pressure seat 1604 and the casing 152 to move upward to the initial position. The drive motor 9 controls the rotating disk 10 to rotate through the third gear 22 and the gear ring 23, adjusting the third connecting disk 13 to be directly above the sand box 3. Then, the third motor 181 drives the rotating shaft 182 to rotate. The rotating shaft 182 controls the brush plate 188 to rotate through the extension rod 185. During the rotation of the brush plate 188, the filling sand on the perforated plate will move. The filling sand flows downward through the inclined hole 189 and falls outward in a diffused manner. The filling sand falls into the cavity inside the sand box 3, and the fifth electric hydraulic rod 1601 is shortened. The hydraulic rod 19 extends to drive the connecting cylinder 20 to compact the filling sand between the side of the molding sand and the sand box 3. Then, the fifth electric hydraulic rod 19 is controlled to shorten, driving the connecting cylinder 20 to move upward to the initial position. Until the filling sand is level with the molding sand in the sand box 3, the electromagnetic clutch 186 is activated, causing the two brush plates 188 to rotate and push the filling sand in the material bucket 183. The filling sand falls through the perforated plate and the inclined hole 189 and is laid on the upper side of the molding sand. Then, the drive motor 9 controls the rotating disk 10 to rotate through the third gear 22 and the gear ring 23, adjusting the first connecting disk 11 to be directly above the sand box 3. The first electric hydraulic rod 141 is controlled to drive the pressure plate 147 and the pressure ring 145 to move downward, compacting the filling sand and completing the molding sand box 3. Then, the molding sand box 3 can be removed by inserting a forklift into the insertion frame 4.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly automatic molding equipment for wheel hub casting, comprising a mounting base (1), characterized in that, The mounting base (1) is equipped with three limiting strips (21); the limiting strips (21) are provided with support seats (2); the support seats (2) are equipped with insert frames (4); the support seats (2) are provided with sand boxes (3); the sand boxes (3) are provided with lost foam casting (5); the mounting base (1) is equipped with a bracket (7); the side of the bracket (7) is equipped with a drive motor (9); the output shaft of the drive motor (9) is fixedly connected to a third gear (22); the side of the bracket (7) is equipped with a side plate (8); the side plate (8) is rotatably connected to a rotating disk (10) via bearings; the rotating disk (10) A gear ring (23) that meshes with the third gear (22) is installed on the outside of the rotating disk (10); a first connecting disk (11), a second connecting disk (12) and a third connecting disk (13) are installed through the rotating disk (10); a compaction mechanism (14) is connected through the first connecting disk (11); a barrier mechanism (15) is connected through the second connecting disk (12); a sandblasting mechanism (17) is installed outside the barrier mechanism (15); a tamping mechanism (16) is installed under the second connecting disk (12); a material spreading mechanism (18) is installed on the third connecting disk (13); and a mechanical gripper (6) is installed on the mounting base (1).

2. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 1, characterized in that, The compaction mechanism (14) includes a first electric hydraulic rod (141); the first electric hydraulic rod (141) is installed under the first connecting plate (11); the bottom end of the first electric hydraulic rod (141) is fixedly connected to an intermediate seat (142); three guide rods (143) are fixedly connected to the intermediate seat (142); the guide rods (143) are slidably connected to the first connecting plate (11); three second electric hydraulic rods (144) are installed under the intermediate seat (142); the bottom end of the second electric hydraulic rods (144) is connected to a pressure ring (145); three support rods (146) are installed under the intermediate seat (142); a pressure plate (147) is installed at the bottom end of the support rod (146), and the protrusion on the outer arc surface of the pressure plate (147) is located in the groove on the inner arc surface of the pressure ring (145).

3. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 1, characterized in that, The enclosure mechanism (15) includes a third electro-hydraulic rod (151); the third electro-hydraulic rod (151) is connected through the second connecting plate (12); the bottom end of the third electro-hydraulic rod (151) is fixedly connected to the enclosure tube (152).

4. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 3, characterized in that, The sandblasting mechanism (17) includes a storage frame (171) installed on the casing (152); a feeding pipe (172) is connected to the storage frame (171) and passes through the second turntable; a rotating ring (173) is rotatably connected to the inner wall of the storage frame (171); a guide plate (174) is installed on the side of the rotating ring (173); a toothed groove (175) is opened on the outer arc surface of the rotating ring (173); a second gear (176) is meshed in the toothed groove (175); the second gear (176) is located in a hole opened on the side of the storage frame (171); a second motor (177) is connected to the second gear (176); the second motor (177) is installed on the casing (152); the inner arc surface of the storage frame (171) is inclined; a first discharge pipe (179) is connected to the inclined surface of the storage frame (171); a second discharge pipe (178) is connected to the bottom of the storage frame (171).

5. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 1, characterized in that, The tamping mechanism (16) includes a first motor (1612) and a fourth electric hydraulic rod (1601) fixedly connected to the second connecting plate (12); a movable seat (1602) is fixedly connected to the bottom end of the fourth electric hydraulic rod (1601); a sliding hole (1606) is provided on the movable seat (1602); a sliding connecting seat (1605) is slidably connected in the sliding hole (1606); a pressure seat (1604) is installed under the sliding connecting seat (1605); and a pressure cylinder (1603) is installed under the movable seat (1602). A connecting column (1607) is installed on the sliding connecting seat (1605); a first gear (1611) is fixedly connected to the output shaft of the first motor (1612); a gear disk (1608) is externally meshed with the first gear (1611); a pressing hole (1609) is opened on the gear disk (1608); the connecting column (1607) is slidably connected in the pressing hole (1609); a support bearing (1610) is installed on the inner arc surface of the gear disk (1608); the support bearing (1610) is installed on the moving seat (1602).

6. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 3, characterized in that, The circumferential tube (152) is cone-shaped.

7. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 5, characterized in that, The bottom ends of both the pressure base (1604) and the pressure cylinder (1603) are designed to be arc-shaped.

8. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 1, characterized in that, The material spreading mechanism (18) includes a material bucket (183) and a third motor (181) fixedly connected to a third connecting plate (13); the output shaft of the third motor (181) is fixedly connected to a rotating shaft (182); the rotating shaft (182) is rotatably connected inside the third connecting plate (13); an electromagnetic clutch (186) is provided at the bottom end of the rotating shaft (182); a vertical rod (187) is installed below the electromagnetic clutch (186); an extension rod (185) is installed on the side of the rotating shaft (182); a brush plate (188) is fixedly connected to the bottom end of the extension rod (185) and the bottom end of the vertical rod (187); the bottom plate of the material bucket (183) is a perforated plate, and a feeding pipe (184) is connected to the material bucket (183).

9. The environmentally friendly automatic molding equipment for wheel hub casting according to claim 1, characterized in that, The third connecting plate (13) is also provided with a fifth electric hydraulic rod (19); the bottom end of the fifth electric hydraulic rod (19) is equipped with a connecting cylinder (20).

10. An environmentally friendly automatic molding equipment for wheel hub casting according to claim 8, characterized in that, The outer ring of the bottom wall of the material barrel (183) is provided with an oblique hole (189), the brush plate (188) at the bottom of the extension rod (185) corresponds to the oblique hole (189), and the brush plate (188) at the bottom of the vertical rod (187) corresponds to the vertical hole in the perforated plate.

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