Foundry sand falling device
By designing a cast molding sand shedding device, the molding sand shaken by the sand dropper is directly sent to the molding sand pile trough, and dust is collected using negative pressure vacuum suction pipelines, which realizes the recycling and reuse of molding sand, solves the problems of dust pollution and energy waste, reduces costs and improves the utilization rate of molding sand.
Patent Information
- Application Number
- CN202422209321.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In the existing casting production technology, the vibration of the sand-falling machine generates a large amount of dust, affecting the working environment, and sending most of the shaken sand to the drum screening opportunity to increase its operating power, causing energy waste and high costs.
A cast molding sand shedding device is designed, including a sand dropper, a screening roller and a sand pile trough. By setting a notch and a sand guide hopper on the side of the sand dropper, the shaken molding sand is directly sent to the sand pile trough, and dust is collected using a negative pressure vacuum pipe to reduce environmental pollution, and the molding sand is recovered and reused through the blanking branch pipe and buffer bucket.
It effectively reduces dust pollution, reduces the operating power of the drum screen, reduces energy consumption and cost, and improves the utilization rate of molded sand.
Smart Images
Figure CN223043577U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of casting production, and particularly relates to a device for separating casting molding sand. Background Art
[0002] During the production and casting of castings, in order to obtain the castings, it is necessary to separate the molding sand from the surface of the castings. Usually, the feeding port of a drum sieve is connected to a shakeout machine connected to a casting conveying device, and the shakeout machine is used to initially separate the molding sand from the castings. Then, the thinner sand layer and dot-shaped hard sand blocks adhered to the outer surface of the castings are further separated through the drum sieve to ensure the machining quality of the castings. Moreover, the drum sieve can also be used to screen and filter the casting molding sand for recycling. However, since a large amount of dust is generated when the shakeout machine vibrates, it affects the working environment. And during the shakeout machine process, most of the molding sand on the surface of the castings has been shaken off. If this part of the molding sand is sent into the drum sieve, it will increase the operating power of the drum sieve, resulting in energy waste and high costs. Summary of the Invention
[0003] The purpose of the utility model is to provide a device for separating casting molding sand to reduce environmental pollution, reduce the power of the drum sieve, and lower costs in view of the deficiencies of the prior art.
[0004] The purpose of the utility model is achieved by the following technical solutions:
[0005] A device for separating casting molding sand includes a shakeout machine, a screening drum connected to the shakeout machine, and a molding sand storage tank. The upper end of the screening drum is provided with a first dust collection hood, and a first negative pressure dust suction pipeline is connected to the first dust collection hood. First baffles are provided on both sides of the shakeout machine, and a notch is provided on one of the first baffles. A second baffle and a molding sand guiding hopper are provided in the notch. The molding sand guiding hopper extends into the molding sand storage tank, and a certain distance is left between the second baffle and the shakeout machine.
[0006] Further, a second negative pressure dust suction pipeline is connected to the first negative pressure dust suction pipeline. The second negative pressure dust suction pipeline extends above the shakeout machine. A second dust collection hood is provided at the free end of the second negative pressure dust suction pipeline. The second negative pressure dust suction pipeline is connected to a blanking branch pipe, and a blanking hopper is provided at the free end of the blanking branch pipe. The blanking hopper is located above the shakeout machine.
[0007] Further, the blanking branch pipe is inclined.
[0008] Further, a buffer hopper is further provided between the blanking branch pipe and the blanking hopper.
[0009] Further, the cross-section of the buffer hopper is in an inverted eight-shaped structure.
[0010] Furthermore, the screening drum is arranged in the molding sand storage tank.
[0011] Adopting the above technical solution has the following beneficial effects:
[0012] The structure of the utility model is simple. A notch is provided at the first baffle on one side of the shakeout machine. The notch is provided with a second baffle and a molding sand guide hopper. A certain distance is left between the second baffle and the shakeout machine. The molding sand guide hopper extends into the molding sand storage tank. Most of the molding sand shaken off by the shakeout machine can fall into the molding sand guide hopper through this distance, and is directly sent to the molding sand storage tank through the molding sand guide hopper, thereby reducing the power requirement for the drum screening machine and reducing costs and energy consumption.
[0013] A second negative pressure dust suction pipeline is connected to the first negative pressure dust suction pipeline. The second negative pressure dust suction pipeline extends above the shakeout machine. A second dust collection hood is provided at the free end of the second negative pressure dust suction pipeline. The dust generated during the operation of the shakeout machine is collected through the second dust collection hood, reducing environmental pollution. A blanking branch pipe is connected to the second negative pressure dust suction pipeline. A blanking hopper is arranged at the free end of the blanking branch pipe. The molding sand absorbed by the second negative pressure dust suction pipeline is sent back above the shakeout machine through the blanking hopper, realizing the recycling of molding sand.
[0014] A buffer hopper is further arranged between the blanking branch pipe and the blanking hopper. The molding sand after being buffered and deposited by the buffer hopper is sent to the blanking hopper and then sent back to the shakeout machine for recycling.
[0015] The following is a further description in conjunction with the drawings and specific embodiments. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of Specific Embodiment 1.
[0017] In the drawings, 1 is the shakeout machine, 2 is the screening drum, 3 is the molding sand storage tank, 4 is the first negative pressure dust suction pipeline, 5 is the first baffle, 6 is the second baffle, 7 is the molding sand guide hopper, 8 is the second negative pressure dust suction pipeline, 9 is the second dust collection hood, 10 is the blanking hopper, and 11 is the buffer hopper. Specific Embodiments Specific Embodiment 1:
[0019] See Figure 1As shown, a casting molding sand shedding device includes a shakeout machine 1, a screening drum 2 connected to the shakeout machine 1, and a molding sand storage tank 3. The screening drum 2 uses a drum-type screening machine. The upper end of the screening drum 2 is provided with a first dust collection hood, and a first negative pressure dust suction pipeline 4 is connected to the first dust collection hood. In this specific embodiment, a molding sand storage tank is excavated on the ground, and the screening drum 2 is arranged in the molding sand storage tank. The screening drum 2 is lower than the shakeout machine 1, which is convenient for the shakeout machine 1 to automatically fall into the feed port of the screening drum 2. First baffles 5 are provided on both sides of the shakeout machine 1. A notch is provided on one of the first baffles 5, and a second baffle 6 and a molding sand guiding hopper 7 are provided in the notch. The inclination angle of the molding sand guiding hopper 7 is greater than 45%, and the molding sand guiding hopper 7 extends into the molding sand storage tank 3. A certain distance is left between the second baffle 6 and the upper surface of the shakeout machine 1 for feeding. This distance enables some of the molding sand separated by the vibration of the shakeout machine 1 to directly pass through this space and then be sent to the molding sand storage tank through the molding sand guiding hopper, thus avoiding sending all the molding sand to the screening drum, increasing the power of the screening drum, and reducing costs and energy consumption.
[0020] A second negative pressure dust suction pipeline 8 is connected to the first negative pressure dust suction pipeline 4. The second negative pressure dust suction pipeline 8 extends above the shakeout machine 1. The free end of the second negative pressure dust suction pipeline 8 is provided with a second dust collection hood 9. The second dust collection hood 9 is located directly above the shakeout machine 1. The second dust collection hood 9 collects the dust generated by the vibration of the shakeout machine 1 and guides it into the second negative pressure dust suction pipeline 8, reducing the dust flying and purifying the working environment. The second negative pressure dust suction pipeline 8 is connected with a blanking branch pipe. The free end of the blanking branch pipe is provided with a blanking hopper 10. The inclination angle of the blanking hopper 10 is greater than 45%. The blanking branch pipe is inclined. The blanking hopper 10 is located above the shakeout machine 1. The large particle dust, that is, the molding sand, absorbed is sent back into the shakeout machine 1 through the blanking hopper through the blanking branch pipe for recycling, improving the utilization rate of the molding sand.
[0021] Possibly, a buffer hopper 11 is further provided between the blanking branch pipe and the blanking hopper 10. The cross-section of the buffer hopper 11 is in an inverted eight-shaped structure with a larger upper part and a smaller lower part. The area of the buffer hopper 11 is larger than the cross-section of the blanking branch pipe. The buffer hopper 11 buffers the deposited molding sand and sends it to the shakeout machine for recycling, and can also slow down the falling speed of the molding sand, thus avoiding the formation of dust again.
Claims
1. A casting sand shedding device, comprising a sand shakeout machine, a screening drum connected to the sand shakeout machine and a sand stockpile trough, wherein a first dust collecting hood is provided at the upper end of the screening drum, and a first negative pressure dust suction pipeline is connected to the first dust collecting hood, characterized in that: The first baffle is provided on both sides of the sand shakeout machine, and the first baffle on one side is provided with a notch, the notch is provided with a second baffle and a molding sand guide hopper, a certain distance is left between the second baffle and the sand shakeout machine, and the molding sand guide hopper extends into the molding sand stockpile trough.
2. A casting sand shedding device according to claim 1, characterized in that: The first negative pressure dust suction pipeline is connected to a second negative pressure dust suction pipeline, the second negative pressure dust suction pipeline extends to the top of the sand shaker, the free end of the second negative pressure dust suction pipeline is provided with a second dust collecting hood, the second negative pressure dust suction pipeline is connected to a material dropping branch pipe, the free end of the material dropping branch pipe is provided with a material dropping hopper, and the material dropping hopper is located above the sand shaker.
3. A casting sand shedding device according to claim 2, characterized in that: The drop branch pipe is arranged obliquely.
4. A foundry sand shedding device according to claim 2 or 3, characterized in that: A buffer bucket is also provided between the drop branch pipe and the drop hopper.
5. A casting sand shedding device according to claim 4, characterized in that: The cross section of the buffer bucket is an inverted eight-shaped structure.
6. A foundry sand shedding device according to claim 1 or 2, characterized in that: The screening drum is arranged in the molding sand stockpile trough.