A core shooter

Abstract

This utility model discloses a core shooting machine, including a sand storage box, an arch-breaking mechanism, and a humidity regulating mechanism. The sand storage box is mounted on a frame. The arch-breaking mechanism includes an agitator and a drive assembly. The agitator is rotatably connected inside the sand storage box, and the fixed end of the drive assembly is connected to the sand storage box, while the movable end of the drive assembly is connected to the agitator. The humidity regulating mechanism is located inside the sand storage box and is used to regulate the humidity of the molding sand inside the sand storage box. The beneficial effects of this utility model are: the arch-breaking mechanism directly breaks the agglomerated structure of the molding sand through the action of the agitator, ensuring that the molding sand can be continuously and uniformly discharged from the sand storage box; the humidity regulating mechanism regulates the humidity to ensure that the molding sand always maintains good fluidity and bonding strength, thus avoiding both loose molding sand and insufficient sand filling caused by excessively low humidity, and sticky molding sand caused by excessively high humidity, thereby improving the stability of the core forming quality.

Description

Technical Field

[0001] This utility model relates to the field of core shooting machines, and specifically to a core shooting machine. Background Technology

[0002] Core shooters are core equipment in the foundry industry, and their technological level directly affects sand mold quality and production efficiency. In casting production, sand mold quality directly determines the precision and performance of castings. With the development of trends such as lightweighting in automobiles and precision in aerospace, the demand for complex thin-walled castings has surged, and traditional manual molding and simple core shooting equipment can no longer meet the requirements of high-precision and high-efficiency production.

[0003] Chinese utility model patent CN208528032U discloses a clean core shooting machine, including a fixed frame, an hourglass on the fixed frame, a sand ejector connected below the hourglass, a support platform below the sand ejector, the support platform being fixedly connected to the fixed frame, a mold between the support platform and the sand ejector, the mold being connected to the support platform, a gap between the mold and the support platform, a placement groove on the support platform, a sand receiving box being held in the placement groove, a discharge port on the side of the placement groove, and the discharge port being connected to the sand receiving box.

[0004] The above-mentioned technologies have the following drawbacks: the hourglass serves as a temporary storage for molding sand. If the storage time is too long, the molding sand will clump together due to changes in humidity and pressure, and may even get stuck at the outlet of the hourglass, resulting in interruption of sand supply and unstable sand injection volume. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a core shooting machine to solve the technical problem of easy agglomeration of molding sand in the sand storage box in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a core shooting machine, including a sand storage box, which is mounted on a frame; An arch-breaking mechanism, comprising an agitator and a drive assembly, wherein the agitator is rotatably connected to a sand storage tank, the fixed end of the drive assembly is connected to the sand storage tank, and the movable end of the drive assembly is connected to the agitator; and, A humidity regulating mechanism is provided inside the sand storage box, and the humidity regulating mechanism is used to regulate the humidity of the molding sand inside the sand storage box.

[0007] In some embodiments, the agitator includes a turntable and a stirring shaft. The turntable is rotatably connected to the top of a sand storage tank. The fixed end of the drive assembly is connected to the sand storage tank, and the movable end of the drive assembly is connected to the turntable. A plurality of stirring shafts are eccentrically arranged on the turntable.

[0008] In some embodiments, the stirrer further includes stirring blades, and a plurality of stirring blades are spaced apart on the stirring shaft along the length direction of the stirring shaft.

[0009] In some embodiments, the plurality of stirring shafts are arranged in an inclined, diffused configuration.

[0010] In some embodiments, the stirrer further includes an anti-stick layer disposed on the surfaces of the stirring shaft and the stirring blades.

[0011] In some embodiments, the drive assembly includes a motor mounted on a sand storage tank, the output shaft of which is connected to a turntable.

[0012] In some embodiments, the arch-breaking mechanism further includes a vibrator installed at the outlet of the sand storage tank.

[0013] In some embodiments, the humidity regulating mechanism includes a controller, a humidity sensor, a water tank, a valve, a water pipe, a water pump, and an atomizing nozzle. The controller is installed on a sand storage tank, and multiple humidity sensors are installed inside the sand storage tank. The outlet of the water tank is connected to the inlet of the water pipe. The valve is located on the water pipe, and the outlet of the water pipe is connected to the inlet of the water pump. The outlet of the water pump is connected to the inlet of the atomizing nozzle, and the atomizing nozzle is installed on the top of the sand storage tank. The controller, humidity sensor, valve, and water pump are electrically connected.

[0014] In some embodiments, the humidity regulating mechanism further includes a partition screen disposed inside the sand storage tank near the top, the partition screen being used to separate the atomizing nozzle from the molding sand inside the sand storage tank.

[0015] In some embodiments, the humidity regulating mechanism further includes a hot air blower, which is mounted on the sand storage tank, with the air outlet of the hot air blower facing into the sand storage tank, and the hot air blower is electrically connected to the controller.

[0016] Compared with the prior art, the beneficial effects of this utility model include: the arch breaking mechanism directly breaks the agglomerated structure of the molding sand through the action of the agitator, ensuring that the molding sand can be discharged continuously and evenly from the sand storage box; the humidity regulating mechanism regulates the humidity to keep the molding sand in good fluidity and bonding strength at all times: it avoids the molding sand from being loose and insufficient sand filling caused by excessively low humidity, and also prevents the molding sand from becoming sticky caused by excessively high humidity, thus improving the stability of the core molding quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the core shooting machine provided by this utility model; Figure 2 This is a cross-sectional view of the overall structure of the sand storage box provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Sand storage box; 11. Frame; 2. Arch breaking mechanism; 21. Agitator; 211. Turntable; 212. Agitator shaft; 213. Agitator blades; 22. Drive assembly; 221. Motor; 23. Vibrator; 3. Humidity control mechanism; 31. Controller; 32. Humidity sensor; 33. Water tank; 34. Valve; 35. Water pipe; 36. Water pump; 37. Atomizing nozzle; 38. Partition screen; 39. Hot air blower. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] This utility model provides a core shooting machine, the structure of which is as follows: Figure 1 - Figure 2 As shown, it includes a sand storage box 1, an arch-breaking mechanism 2, and a humidity regulating mechanism 3.

[0021] The sand storage box 1 is mounted on the frame 11.

[0022] The arch-breaking mechanism 2 includes a stirrer 21 and a drive assembly 22. The stirrer 21 is rotatably connected to the sand storage tank 1. The fixed end of the drive assembly 22 is connected to the sand storage tank 1, and the movable end of the drive assembly 22 is connected to the stirrer 21.

[0023] The humidity regulating mechanism 3 is located inside the sand storage box 1, and the humidity regulating mechanism 3 is used to regulate the humidity of the molding sand inside the sand storage box 1.

[0024] During use, the drive assembly 22 drives the agitator 21 in the sand storage tank 1 to rotate intermittently. When the blades of the agitator 21 come into contact with the molding sand, they generate mechanical shearing and thrust, breaking up the arched structure and agglomerates formed in the molding sand due to long-term storage. The humidity control mechanism 3 monitors the humidity value of the molding sand in the sand storage tank 1 in real time. When the humidity is lower than the set threshold, a small amount of moisture is added to the molding sand through a spray device to stabilize the humidity of the molding sand within the process requirements, thereby reducing agglomeration caused by abnormal humidity at the source.

[0025] In this invention, the arch-breaking mechanism 2 directly breaks the agglomerated structure of the molding sand through the action of the agitator 21, ensuring that the molding sand can be discharged continuously and evenly from the sand storage box 1. The humidity regulating mechanism 3 regulates the humidity to keep the molding sand in good fluidity and bonding strength. This avoids the molding sand from becoming loose and insufficient filling due to low humidity, and also prevents the molding sand from becoming sticky due to high humidity, thus improving the stability of the core molding quality.

[0026] To achieve proper mixing of the molding sand, please refer to... Figure 2 In a preferred embodiment, the stirrer 21 includes a turntable 211 and stirring shafts 212. The turntable 211 is rotatably connected to the top of the sand storage tank 1. The fixed end of the drive assembly 22 is connected to the sand storage tank 1, and the movable end of the drive assembly 22 is connected to the turntable 211. A plurality of stirring shafts 212 are eccentrically arranged on the turntable 211.

[0027] In use, multiple stirring shafts 212 are eccentrically arranged around the turntable 211, and in conjunction with the rotation of the turntable 211, they can form irregular stirring tracks within the sand storage tank 1. This structure can more comprehensively cover all areas of the sand storage tank 1, preventing the molding sand from accumulating and clumping in certain areas. In particular, it can break up the dead corners at the connection between the side walls and the bottom of the sand storage tank 1, ensuring that the overall molding sand is in a loose state.

[0028] To improve mixing results, please refer to... Figure 2 In a preferred embodiment, the stirrer 21 further includes stirring blades 213, and a plurality of stirring blades 213 are spaced apart on the stirring shaft 212 along the length direction of the stirring shaft 212.

[0029] During use, multiple stirring blades 213 are spaced apart along the length of the stirring shaft 212, which can agitate the molding sand at different heights in the sand storage box 1 in layers. The upper stirring blades 213 can break up the molding sand at the top that is prone to clumping due to moisture absorption, the middle stirring blades 213 promote overall convection mixing, and the lower stirring blades 213 focus on loosening the sand material at the bottom that is easy to compact, avoiding the problem of uneven state of the upper and lower layers of sand due to agitation at a single height, and ensuring that the molding sand in the whole box is in a loose and flowable state.

[0030] To further improve the mixing effect, please refer to... Figure 2 In a preferred embodiment, the plurality of stirring shafts 212 are arranged in an inclined and diffused manner.

[0031] When in use, the overall diffused radial layout expands the mixing range from a plane to a three-dimensional space, covering the height and radius of the sand storage box 1, eliminating dead corners of upper and lower layers and internal and external isolation.

[0032] To reduce the possibility of molding sand adhering to the mixer 21, please refer to... Figure 2 In a preferred embodiment, the stirrer 21 further includes an anti-stick layer disposed on the surface of the stirring shaft 212 and the stirring blade 213.

[0033] During use, if molding sand adheres to the surface of the mixing components for an extended period, it will gradually dry and harden due to prolonged contact with air, forming a hard shell. When this hard shell detaches, it mixes into the overall sand material, becoming secondary caking and interfering with the uniformity of moisture content. The anti-sticking layer is made of Teflon coating with a thickness of 0.1mm, which has extremely low surface energy, significantly reducing the adhesion between the molding sand and the component surface and minimizing the possibility of secondary caking.

[0034] To operate stirrer 21, please refer to... Figure 1 In a preferred embodiment, the drive assembly 22 includes a motor 221, which is mounted on the sand storage box 1, and the output shaft of the motor 221 is connected to the turntable 211.

[0035] In use, the motor 221 is installed in a fixed position in the sand storage box 1 as a power source, and the output shaft of the motor 221 is rigidly connected to the central shaft of the turntable 211 through a coupling. When the motor 221 is powered on and started, its output shaft generates rotational motion, and the torque is directly transmitted to the turntable 211 through the connection structure, causing the turntable 211 to rotate around its own axis.

[0036] To reduce the possibility of molding sand clumping at the outlet of sand storage box 1, please refer to... Figure 1 In a preferred embodiment, the arch-breaking mechanism 2 further includes a vibrator 23, which is installed at the outlet of the sand storage box 1.

[0037] During use, as molding sand flows towards the outlet under gravity, it easily forms a stable arched structure due to the adsorption and friction between particles, causing the outlet to be suspended and the material to be cut off. The vibrator 23 acts on the wall of the sand storage box 1 or the discharge channel in the outlet area through high-frequency vibration. The impact force generated by the vibration destroys the cohesion between sand particles, causing the arched structure to lose stability and collapse, and the sand falls smoothly with gravity.

[0038] To achieve moisture control of the molding sand, please refer to... Figure 2 In a preferred embodiment, the humidity regulating mechanism 3 includes a controller 31, a humidity sensor 32, a water tank 33, a valve 34, a water pipe 35, a water pump 36, and an atomizing nozzle 37. The controller 31 is installed on the sand storage tank 1, and multiple humidity sensors 32 are installed inside the sand storage tank 1. The outlet of the water tank 33 is connected to the inlet of the water pipe 35. The valve 34 is located on the water pipe 35. The outlet of the water pipe 35 is connected to the inlet of the water pump 36. The outlet of the water pump 36 is connected to the inlet of the atomizing nozzle 37. The atomizing nozzle 37 is installed on the top of the sand storage tank 1. The controller 31, humidity sensor 32, valve 34, and water pump 36 are electrically connected.

[0039] During operation, multiple humidity sensors 32 continuously monitor the humidity of the molding sand and transmit electrical signals to the controller 31. Multi-point monitoring avoids errors from a single sensor, ensuring a true reflection of the humidity status of the entire molding sand tank. The controller 31 receives signals from each humidity sensor 32, processes the data, and compares it with preset thresholds. If humidification is required, the controller 31 sends a start signal to the valve 34 and water pump 36. The valve 34 opens, and water from the water tank 33 enters the water pump 36 through the water pipe 35. The water pump 36 pressurizes the water and delivers it to the atomizing nozzle 37 at the top of the sand storage tank 1. The atomizing nozzle 37 atomizes the water into tiny droplets, spraying them evenly onto the surface of the molding sand. During humidification, the humidity sensors 32 continuously monitor humidity changes and provide feedback to the controller 31. When the humidity reaches the preset upper limit threshold, the controller 31 issues a command to shut off the water pump 36 and valve 34, stopping humidification and stabilizing the molding sand humidity within the required process range.

[0040] To reduce the likelihood of atomizing nozzle 37 becoming clogged, please refer to... Figure 2 In a preferred embodiment, the humidity regulating mechanism 3 further includes a partition net 38, which is disposed in the sand storage box 1 near the top and is used to separate the atomizing nozzle 37 from the molding sand in the sand storage box 1.

[0041] When in use, the atomizing nozzle 37 atomizes water into tiny droplets through a fine nozzle. If directly exposed above the molding sand, dust from the sand storage tank 1 can easily enter and accumulate in the nozzle, causing blockage. The mesh 38 physically prevents sand particles from contacting the nozzle while allowing the atomized droplets to penetrate and diffuse into the molding sand, ensuring long-term stable operation of the nozzle. Furthermore, when the atomizing nozzle 37 sprays directly, the droplets may concentrate in a localized area due to the spray pressure, leading to uneven humidity distribution. The mesh 38 provides secondary dispersion; as the atomized droplets pass through the mesh 38, they are separated and buffered by the mesh openings, preventing direct impact on the molding sand and the formation of localized over-wetting. Combined with the airflow within the sand storage tank 1, the droplets diffuse more evenly within the tank after passing through the mesh 38, allowing the molding sand in different areas to absorb moisture simultaneously and reducing clumping caused by localized humidity differences.

[0042] To achieve the drying of molding sand, please refer to... Figure 2 In a preferred embodiment, the humidity regulating mechanism 3 further includes a hot air blower 39, which is mounted on the sand storage box 1 and has its air outlet facing into the sand storage box 1. The hot air blower 39 is electrically connected to the controller 31.

[0043] During use, the humidity control mechanism 3 can only humidify through the atomizing nozzle 37, while the addition of the hot air blower 39 can activate the drying mode to address the problem of excessively wet molding sand, forming a closed-loop control. When the humidity sensor 32 detects that the molding sand humidity is too high, the controller 31 sends a start signal to the hot air blower 39. The hot air blown out by the hot air blower 39 directly acts on the surface of the molding sand. The hot air increases the ambient temperature inside the sand storage box 1, accelerates the evaporation of moisture on the surface of the molding sand, and, together with the stirring of the agitator 21, ensures that the wet sand is evenly contacted by the hot air, quickly reducing the overall humidity to the normal range and avoiding problems such as adhesion, clumping, or poor fluidity caused by excessively wet molding sand.

[0044] To better understand this utility model, the following is combined with... Figure 1 - Figure 2 The working principle of a core shooter according to the present invention is described in detail as follows: The drive assembly 22 drives the agitator 21 in the sand storage tank 1 to rotate intermittently. When the blades of the agitator 21 come into contact with the molding sand, they generate mechanical shearing force and thrust, breaking up the arched structure and agglomeration formed in the molding sand due to long-term storage. The humidity control mechanism 3 monitors the humidity value of the molding sand in the sand storage tank 1 in real time. When the humidity is lower than the set threshold, a small amount of moisture is added to the molding sand through a spray device to stabilize the humidity of the molding sand within the process requirements, thereby reducing agglomeration caused by abnormal humidity at the source.

[0045] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A core shooting machine, characterized in that, include: A sand storage tank, which is mounted on the frame; An arch-breaking mechanism, comprising an agitator and a drive assembly, wherein the agitator is rotatably connected to a sand storage tank, the fixed end of the drive assembly is connected to the sand storage tank, and the movable end of the drive assembly is connected to the agitator; and, A humidity regulating mechanism is provided inside the sand storage box, and the humidity regulating mechanism is used to regulate the humidity of the molding sand inside the sand storage box.

2. The core shooting machine according to claim 1, characterized in that, The agitator includes a turntable and a stirring shaft. The turntable is rotatably connected to the top of the sand storage tank. The fixed end of the drive assembly is connected to the sand storage tank, and the movable end of the drive assembly is connected to the turntable. Multiple stirring shafts are eccentrically mounted on the turntable.

3. The core shooting machine according to claim 2, characterized in that, The stirrer also includes stirring blades, and a plurality of stirring blades are spaced apart on the stirring shaft along the length of the stirring shaft.

4. The core shooting machine according to claim 2, characterized in that, The multiple stirring shafts are arranged in an inclined and diffused manner.

5. The core shooter according to claim 3, characterized in that, The stirrer also includes an anti-stick layer, which is disposed on the surface of the stirring shaft and the stirring blades.

6. The core shooter according to claim 2, characterized in that, The drive assembly includes a motor mounted on a sand storage tank, and the output shaft of the motor is connected to a turntable.

7. The core shooter according to claim 1, characterized in that, The arch-breaking mechanism also includes a vibrator, which is installed at the outlet of the sand storage box.

8. The core shooter according to claim 1, characterized in that, The humidity control mechanism includes a controller, a humidity sensor, a water tank, a valve, a water pipe, a water pump, and an atomizing nozzle. The controller is installed on the sand storage tank, and multiple humidity sensors are installed inside the sand storage tank. The outlet of the water tank is connected to the inlet of the water pipe. The valve is located on the water pipe, and the outlet of the water pipe is connected to the inlet of the water pump. The outlet of the water pump is connected to the inlet of the atomizing nozzle, and the atomizing nozzle is installed on the top of the sand storage tank. The controller, humidity sensor, valve, and water pump are electrically connected.

9. The core shooting machine according to claim 8, characterized in that, The humidity control mechanism also includes a partition screen, which is located inside the sand storage tank near the top and is used to separate the atomizing nozzle from the molding sand inside the sand storage tank.

10. The core shooter according to claim 8, characterized in that, The humidity control mechanism also includes a hot air blower, which is mounted on the sand storage tank. The air outlet of the hot air blower faces into the sand storage tank, and the hot air blower is electrically connected to the controller.

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