A precision molding automobile part casting device

Abstract

This invention discloses a precision-molded automotive parts casting device, relating to the field of casting equipment. It includes a processing box, with a processing assembly located at its rear. The processing assembly includes a mounting box, the inner cavity of which is connected to a disc, and the top of the disc is fixedly connected to multiple material feeding boxes. A long rod is rotatably connected to the inner cavity of the mounting box, and a round rod is connected to the long rod. A cylinder is fixedly connected to the inner cavity of the mounting box, and the output end of the cylinder is fixedly connected to a first connecting rod. A toothed plate is fixedly connected to the outer surface of the first connecting rod. A second connecting rod is rotatably connected to the inner cavity of the mounting box, and a gear is fixedly connected to the outer surface of the second connecting rod via a one-way bearing. This invention, by incorporating structures such as a disc in the processing assembly, enables multiple material feeding boxes to be arranged sequentially along the circumferential direction in a cyclical manner, allowing for continuous pressing and molding of multiple workpieces within the same working cycle.

Description

Technical Field

[0001] This invention relates to the field of casting equipment, specifically to a precision casting apparatus for automotive parts. Background Technology

[0002] In the sand casting production of automotive parts, die forming is a key process in preparing sand molds. The core of this process lies in uniformly filling the molding sand into the discharge box (sand box), and then applying pressure through a pressure plate to compact it into shape, thereby obtaining a sand mold with accurate dimensions and sufficient strength.

[0003] Currently, common compression molding equipment typically employs a dual-station design, meaning the equipment has two feeding bins. While one station is filling sand and pressing the mold, the other station can handle demolding or preparation. Although this design is an improvement over a single-station design, it still has shortcomings in actual production. During the process of conveying molding sand from the feed hopper to the feeding bin, issues such as uneven moisture content, particle size distribution, or poor flowability often lead to accumulation or even complete blockage at the feeding pipes or discharge ports. Furthermore, traditional gravity feeding methods struggle to ensure that the sand is evenly and stably filled into every corner of the feeding bin, easily resulting in inconsistent mold compaction. During feeding, some sand that fails to enter the feeding bin may be compressed into clumps at the pipe openings, pressure plates, or equipment platforms due to the pressure of the feeding mechanism. When the equipment completes pressing at one station and switches stations, these residual sand clumps may fall and mix into the next feeding bin to be pressed, or fall onto the surface of already pressed molds. This can lead to surface defects, internal porosity, or uneven strength in the final sand mold, directly affecting the accuracy and pass rate of subsequent castings. Summary of the Invention

[0004] The purpose of this invention is to provide a precision molding casting apparatus for automotive parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision-formed automotive parts casting device, comprising a processing box, a feeding bin fixedly connected to the top of the processing box, and a processing assembly provided on the rear side of the processing box; The processing assembly includes a mounting box, the inner cavity of which is connected to a disc, and the top of the disc is fixedly connected to multiple material feeding boxes. The inner cavity of the mounting box is rotatably connected to a long rod, and a round rod is connected to the long rod; A cylinder is fixedly connected to the inner cavity of the mounting box, and a first connecting rod is fixedly connected to the output end of the cylinder. A toothed plate is fixedly connected to the outer surface of the first connecting rod. A second connecting rod is rotatably connected to the inner cavity of the mounting box. A gear is fixedly connected to the outer surface of the second connecting rod through a one-way bearing, and the gear meshes with the toothed plate. A mounting rod is rotatably connected to the rear side of the feeding hopper. A push plate is fixedly connected to the outer surface of the mounting rod. Second pulleys are respectively mounted on the outer surfaces of the mounting rod and the second connecting rod, and the two second pulleys are connected by belt drive. The front and rear sides of the feeding hopper are slidably connected to movable plates, and damping spring rods are installed on both sides of the feeding hopper. The output end of the damping spring rod is connected to the bottom of the movable plate.

[0006] Preferably, the inner cavity of the mounting box is rotatably connected to a round rod, the top end of which penetrates into the inner cavity of the processing box and is fixedly connected to a disc, and the disc can slide relative to the inner cavity of the feeding box.

[0007] Preferably, bevel gears are fixedly connected to the outer surfaces of the long rod and the round rod, and the two bevel gears mesh to connect the long rod and the round rod perpendicularly.

[0008] Preferably, a weight sensor is installed inside the material feeding box.

[0009] Preferably, the inner cavity of the feeding hopper is connected to a feeding pipe, the bottom end of the feeding pipe extends into the inner cavity of the processing box, a solenoid valve is installed on the outer surface of the feeding pipe, and a spiral blade is provided inside the feeding pipe.

[0010] Preferably, the end of the first connecting rod away from the cylinder extends into the inner cavity of the processing box and is fixedly connected to a pressure plate.

[0011] Preferably, the push plate cooperates with the moving plate to drive the moving plate to reciprocate up and down.

[0012] Preferably, the outer surfaces of the second connecting rod and the long rod are equipped with first pulleys, and the two first pulleys are connected by belt drive.

[0013] Preferably, a mounting plate is fixedly connected to the top of the movable plate, a protective box is fixedly connected to the top of the mounting plate, a motor is fixedly connected to the inner cavity of the protective box, a stirring rod is fixedly connected to the output shaft of the motor, and a spiral blade is fixedly connected to the bottom end of the stirring rod.

[0014] Preferably, the top of the feeding hopper is provided with a feeding port.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up structures such as discs in the processing components, enables multiple material feeding boxes to be arranged sequentially along the circumference and circulate in a working station. This allows the equipment to continuously perform compression molding on multiple workpieces within the same working cycle, breaking through the limitation of traditional equipment that can only process two workpieces at the same time. It significantly improves the parallel processing capability and overall production cycle of the equipment, greatly shortens the molding cycle of a unit workpiece, and thus comprehensively improves the working efficiency and production capacity of compression molding.

[0016] 2. The integrated stirring rod and spiral blades of this invention operate continuously during the feeding process, not only uniformly mixing the sand in the feed hopper but also actively pushing and agitating the sand as it is conveyed through the feeding pipe to the discharge box. This structure effectively prevents bridging, accumulation, or channel blockage caused by uneven moisture content, particle size, or poor flowability of the sand, ensuring a continuous, stable, and smooth feeding process. This not only improves the feeding speed and molding cycle time but also reduces the frequency of manual intervention, making equipment operation simpler and more reliable. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure.

[0018] Figure 2 This is a three-dimensional schematic diagram of the disassembled structure of the mounting box.

[0019] Figure 3 This is a three-dimensional schematic diagram of the side cross-section of the processing box structure.

[0020] Figure 4 This is a side view of the feeding pipe structure.

[0021] Figure 5 This is a three-dimensional schematic diagram of a disc structure.

[0022] Figure 6 This is a three-dimensional schematic diagram of the pressure plate structure.

[0023] Figure 7 This is a three-dimensional schematic diagram of the stirring rod structure.

[0024] Figure 8 This is a three-dimensional side view sectional diagram of the feed hopper structure.

[0025] In the diagram: 1 - Processing box; 2 - Processing component; 11 - Feed hopper; 21 - Mounting box; 22 - Disc; 23 - Discharge box; 24 - Round rod; 25 - Bevel gear; 26 - Long rod; 27 - Feeding pipe; 28 - Solenoid valve; 29 - Cylinder; 210 - First connecting rod; 211 - Gear plate; 212 - Second connecting rod; 213 - Gear; 214 - Pressure plate; 215 - First pulley; 216 - Push plate; 217 - Moving plate; 218 - Damping spring rod; 219 - Mounting plate; 220 - Protective box; 221 - Motor; 222 - Stirring rod; 223 - Spiral blade; 224 - Second pulley; 225 - Mounting rod. Detailed Implementation

[0026] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1 to 8 The present invention provides a technical solution: a precision forming automotive parts casting device, including a processing box 1, a feeding bin 11 fixedly connected to the top of the processing box 1, and a processing assembly 2 provided on the rear side of the processing box 1; The processing component 2 includes a mounting box 21, the inner cavity of which is connected to a disc 22, and the top of the disc 22 is fixedly connected to a plurality of material feeding boxes 23. The inner cavity of the mounting box 21 is rotatably connected to a long rod 26, and a round rod 24 is connected to the long rod 26; A cylinder 29 is fixedly connected to the inner cavity of the mounting box 21. A first connecting rod 210 is fixedly connected to the output end of the cylinder 29. A toothed plate 211 is fixedly connected to the outer surface of the first connecting rod 210. A second connecting rod 212 is rotatably connected to the inner cavity of the mounting box 21. A gear 213 is fixedly connected to the outer surface of the second connecting rod 212 through a one-way bearing, and the gear 213 meshes with the toothed plate 211. The rear side of the feed hopper 11 is rotatably connected to an installation rod 225. A push plate 216 is fixedly connected to the outer surface of the installation rod 225. The outer surfaces of the installation rod 225 and the second connecting rod 212 are respectively equipped with second pulleys 224, and the two second pulleys 224 are connected by belt drive. The front and rear sides of the feed hopper 11 are slidably connected to movable plates 217, and damping spring rods 218 are installed on the front and rear sides of the feed hopper 11. The output end of the damping spring rods 218 is connected to the bottom of the movable plates 217.

[0028] The processing assembly 2 includes a mounting box 21, which is securely connected to the rear wall of the processing box 1 by bolts to ensure the stability of the overall structure. A vertically positioned round rod 24 is rotatably connected to the inner cavity of the mounting box 21 via a deep groove ball bearing. The round rod 24 is powered by a drive motor (not shown) at the bottom. The top of the round rod 24 extends upwards through the top plate of the mounting box 21 and the wall of the processing box 1, reaching the inner cavity of the processing box 1. A disc 22 is fixed to its top via a flat key. The disc 22 slides against the bottom surface of the processing box 1 via an embedded wear-resistant slide rail to reduce friction and ensure smooth rotation. Four rectangular feeding boxes 23 are evenly fixed to the top of the disc 22 along the circumference. These feeding boxes 23 are welded from high-strength steel plates and are used to hold molding sand for compression molding. Each feeding box 23 has a pre-drilled mounting slot at the bottom of its inner cavity for installing a high-precision weight sensor (not shown in the figure). The sensor signal is transmitted to the central control system via wired connection to monitor the sand filling weight in real time, ensuring consistent molding quality. In addition, the rotation of the disc 22 can drive the feeding boxes 23 to pass sequentially through the molding station in the processing box 1, enabling continuous operation.

[0029] Inside the mounting box 21, a horizontally positioned long rod 26 is rotatably connected via a precision bearing. The portions of the long rod 26 and the round rod 24 located inside the mounting box 21 are both fixedly connected to bevel gears 25 via flat keys. The two bevel gears 25 mesh perpendicularly with each other, forming a reliable spatial transmission mechanism, thereby efficiently and stably converting the horizontal rotational motion input by the long rod 26 into the vertical rotational motion output by the round rod 24.

[0030] A vertically arranged feeding pipe 27 is connected to the bottom of the inner cavity of the feeding hopper 11. The bottom end of the feeding pipe 27 penetrates the top plate of the processing box 1 and extends into its inner cavity. Its outlet end is precisely aligned with the feed port of one of the discharge boxes 23 on the disc 22 to ensure smooth material flow. A high-precision solenoid valve 28 is installed on the outer surface of the feeding pipe 27. This solenoid valve 28 can respond quickly to control signals to achieve precise and programmable control of material discharge opening and closing and flow rate.

[0031] A cylinder 29 is securely mounted on the inner cavity of the mounting box 21 via a bracket. This cylinder serves as a power source to provide precise linear motion. The piston rod end of the cylinder 29 is tightly connected to a first connecting rod 210 via a flange to ensure the stability and rigidity of power transmission. The first connecting rod 210 extends vertically downwards, passing sequentially through the bottom opening of the mounting box 21 and the corresponding channel of the processing box 1, with its bottom end fixedly connected to a pressure plate 214. The pressure plate 214 is optimized in design, its shape perfectly matching the inner cross-section of the discharge box 23, thereby applying pressure evenly and effectively during operation to achieve stable material handling. A toothed plate 211 is securely fixed to the portion of the first connecting rod 210 located inside the mounting box 21. This toothed plate is a key component in converting linear motion into rotational motion.

[0032] Inside the mounting box 21, a second connecting rod 212 is rotatably connected via a high-precision bearing. This connecting rod is used to transmit and control rotational motion. A gear 213 is fixedly connected to the second connecting rod 212 via a one-way bearing. This configuration achieves unidirectional transmission. The setting direction of this one-way bearing is carefully adjusted: when the gear plate 211 moves downward as the cylinder retracts, the rack portion of the gear plate 211 meshes with the gear 213, thereby driving the gear 213 and the second connecting rod 212 to rotate in the specified direction, completing the required mechanical action; when the gear plate 211 moves upward as the cylinder extends, the gear 213 idles on the one-way bearing, at which point the second connecting rod 212 remains stationary and does not rotate, avoiding reverse interference. Throughout the entire motion cycle, the gear 213 and the gear plate 211 remain in a meshed state, ensuring the continuity of the transmission process and the repeatability of the operation.

[0033] The length of the toothed plate 211 allows the gear 213 to rotate at least one revolution when the toothed plate 211 meshes with the gear 213.

[0034] At the outer ends of the second connecting rod 212 and the long rod 26, first pulleys 215 are fixedly installed respectively. The two first pulleys 215 are connected by a synchronous belt. The rotation of the toothed plate 211 can drive the second connecting rod 212 to rotate. Through the transmission of the first pulleys 215, the long rod 26 will be driven to rotate. The length of the toothed plate 211 is sufficient to allow the disc 22 to rotate 1 / 4 revolution before disengaging from the gear 213 and continuing downward. During this downward process, the pressure plate 214 will press down the sand in the discharge box 23. During the return stroke, the pressure plate 214 will first disengage from the discharge box 23 and then contact the gear 213.

[0035] On the rear outer wall of the feed hopper 11, a mounting rod 225 is rotatably connected via a bearing. This bearing ensures the smooth rotation of the mounting rod. A cam-shaped push plate 216 is fixedly connected to the outer end of the mounting rod 225, and its cam profile is designed for periodic pushing action. Second pulleys 224 are fixedly mounted on the mounting rod 225 and the second connecting rod 212, respectively. The two second pulleys 224 are connected by another synchronous belt, which ensures the synchronicity of power transmission, enabling the second pulleys 224 to drive the push plate 216 to rotate. During rotation, the push plate 216 pushes the moving plate 217 with its protruding part.

[0036] On the inner walls of the front and rear sides of the feeding hopper 11, there is a set of vertical guide grooves. A movable plate 217 is slidably connected in each guide groove. The guide groove structure restricts the movable plate 217 to move only vertically, ensuring the stability of the motion trajectory. On the outer wall of the feeding hopper 11, a damping spring rod 218 is fixedly installed below each movable plate 217. The top of the piston rod of the damping spring rod 218 is hinged to the bottom of the movable plate 217. The hinge design allows the movable plate 217 to adapt to angle changes during movement. At the same time, the damping spring rod 218 provides buffering and assists the movable plate 217 to slowly return to its original position after being pushed by its built-in spring and damping mechanism.

[0037] The protruding part of the push plate 216 on the rear side of the feed hopper 11 contacts the bottom side of the rear moving plate 217, which can push it upward when rotating. The rotation of the push plate 216 is precisely controlled by the belt drive system, so that the pushing action is coordinated with the overall machinery, thereby realizing the smooth advancement of materials in the feed hopper.

[0038] A mounting plate 219 is fixedly connected to the top of the two movable plates 217. A protective box 220 is bolted to the top of the mounting plate 219. A motor 221 is fixedly installed inside the protective box 220. The output shaft of the motor 221 extends vertically downward from the protective box 220 and the mounting plate 219, and is fixedly connected to a stirring rod 222. The bottom end of the stirring rod 222 extends downward into the feeding pipe 27, and a spiral blade 223 is fixedly connected to its end.

[0039] Working principle: After the user pours the sand into the feeding hopper 11, the motor 221 is started. The motor 221 drives the stirring rod 222 to rotate, which stirs the sand evenly. At the same time, the stirring rod 222 drives the spiral blade 223 to rotate synchronously, so that the sand is stably transported to the discharge box 23 along the feeding pipe 27. The discharge process is precisely controlled by the solenoid valve 28, which effectively prevents the discharge box 23 from overflowing due to overfilling.

[0040] Subsequently, cylinder 29 is activated, and its piston rod pushes the first connecting rod 210 downward, causing the gear plate 211 to move downward synchronously. During the movement, the gear plate 211 meshes with gear 213, driving gear 213 to rotate, which in turn drives the second connecting rod 212 to rotate. The second connecting rod 212 simultaneously drives the first pulley 215 and the second pulley 224 to rotate. The first pulley 215 drives the long rod 26 to rotate through the transmission. The long rod 26 drives the bevel gear 25 to rotate. The bevel gear 25 meshes with the round rod 24 and drives it to rotate. Finally, the disc 22 and the feeding box 23 filled with sand are rotated together to the position directly below the pressure plate 214. At this time, the pressure plate 214 moves down and presses the sand in the feeding box 23 to form a mold.

[0041] Simultaneously, the second pulley 224 drives the mounting rod 225 to rotate, and the mounting rod 225 drives the push plate 216 to swing periodically, pushing the moving plate 217 to move up and down reciprocally. The moving plate 217 automatically resets through the damping spring rod 218, and drives the stirring rod 222 and the spiral blade 223 to vibrate axially synchronously. This up-and-down vibration disturbs the sand, significantly reducing the risk of blockage in the feeding channel. At the same time, in order to avoid sand agglomeration caused by long-term stirring, air is added to the sand through this up-and-down motion, making the sand loose as a whole. In particular, this up-and-down process is synchronized with the downward pressure, which can promptly disturb the sand entering the spiral blade 223. This disturbance does not occur when the pressure plate 214 rises, which can ensure stable flow of sand entering the discharge box 23 through the solenoid valve 28, improve the continuity and stability of the feeding, thereby accelerating the overall molding rhythm and improving the operating efficiency of the equipment.

[0042] Based on the above, this invention, by setting up structures such as discs in the processing components, enables multiple material feeding boxes to be arranged sequentially along the circumference and circulated in a working station. This allows the equipment to continuously perform compression molding on multiple workpieces within the same working cycle, breaking through the limitation of traditional equipment that can only process two workpieces at the same time. This significantly improves the parallel processing capability and overall production cycle of the equipment, greatly shortens the molding cycle of a unit workpiece, and thus comprehensively improves the working efficiency and production capacity of compression molding.

[0043] The integrated mixing rod and spiral blades operate continuously during the feeding process, not only uniformly mixing the sand in the feed hopper but also actively pushing and agitating the sand as it is conveyed through the feeding pipe to the discharge box. This structure effectively prevents bridging, accumulation, or channel blockage caused by sand due to moisture content, uneven particle size, or poor flowability, ensuring a continuous, stable, and smooth feeding process. This not only improves the feeding speed and molding cycle time but also reduces the frequency of manual intervention, making equipment operation simpler and more reliable.

[0044] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative and not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A precision casting apparatus for automotive parts, characterized in that: The processing box (1) is fixedly connected to the top of the processing box (1), and a processing assembly (2) is provided on the rear side of the processing box (1). The processing component (2) includes a mounting box (21), the inner cavity of which is connected to a disc (22), and the top of the disc (22) is fixedly connected to a plurality of material feeding boxes (23). The inner cavity of the mounting box (21) is rotatably connected to a long rod (26), and a round rod (24) is connected to the long rod (26). A cylinder (29) is fixedly connected to the inner cavity of the mounting box (21). A first connecting rod (210) is fixedly connected to the output end of the cylinder (29). A toothed plate (211) is fixedly connected to the outer surface of the first connecting rod (210). A second connecting rod (212) is rotatably connected to the inner cavity of the mounting box (21). A gear (213) is fixedly connected to the outer surface of the second connecting rod (212) through a one-way bearing. The gear (213) and the toothed plate (211) mesh. The rear side of the feed hopper (11) is rotatably connected to an installation rod (225), and a push plate (216) is fixedly connected to the outer surface of the installation rod (225). The outer surfaces of the installation rod (225) and the second connecting rod (212) are respectively equipped with second pulleys (224), and the two second pulleys (224) are connected by belt drive. The front and rear sides of the feed hopper (11) are slidably connected to a movable plate (217), and the front and rear sides of the feed hopper (11) are equipped with a damping spring rod (218). The output end of the damping spring rod (218) is connected to the bottom of the movable plate (217).

2. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The inner cavity of the mounting box (21) is rotatably connected to a round rod (24), the top end of which penetrates into the inner cavity of the processing box (1) and is fixedly connected to a disc (22). The disc (22) and the inner cavity of the feeding box (23) can slide relative to each other.

3. The precision forming automotive parts casting apparatus according to claim 2, characterized in that: The outer surfaces of the long rod (26) and the round rod (24) are fixedly connected with bevel gears (25), and the two bevel gears (25) mesh to make the long rod (26) and the round rod (24) perpendicularly connected.

4. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The inner cavity of the feeding box (23) is equipped with a weight sensor.

5. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The inner cavity of the feeding hopper (11) is connected to a feeding pipe (27), the bottom end of the feeding pipe (27) extends into the inner cavity of the processing box (1), a solenoid valve (28) is installed on the outer surface of the feeding pipe (27), and a spiral blade (223) is provided inside the feeding pipe (27).

6. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The end of the first connecting rod (210) away from the cylinder (29) extends into the inner cavity of the processing box (1) and is fixedly connected to a pressure plate (214).

7. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The push plate (216) works in conjunction with the moving plate (217) to drive the moving plate (217) to move up and down reciprocally.

8. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The outer surfaces of the second connecting rod (212) and the long rod (26) are equipped with first pulleys (215), and the two first pulleys (215) are connected by belt drive.

9. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The top of the movable plate (217) is fixedly connected to an installation plate (219), the top of the installation plate (219) is fixedly connected to a protective box (220), the inner cavity of the protective box (220) is fixedly connected to a motor (221), the output shaft of the motor (221) is fixedly connected to a stirring rod (222), and the bottom end of the stirring rod (222) is fixedly connected to a spiral blade (223).

10. The precision forming automotive parts casting apparatus according to claim 1, characterized in that: The top of the feeding hopper (11) is provided with a feeding port.

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