Metal piece production casting sand feeding device

Abstract

The application discloses a metal piece production casting sand feeding device and relates to the field of casting sand feeding. The device comprises a base and a frame. A conveying belt is rotatably arranged on the base. An iron removing assembly is arranged in the frame. A low-frequency vibration assembly is arranged on the base. A reciprocating sliding assembly is arranged in the frame. The low-frequency vibration assembly comprises a rotating piece. The rotating piece is connected with the output end of the conveying belt through a belt pulley transmission. The reciprocating sliding assembly comprises a gear ring plate. A transmission mechanism is arranged on one side of the rotating piece. The other end of the transmission mechanism is connected with a residual gear through the frame. The conveying belt is driven by the rotating piece to generate low-frequency periodic shaking. The casting sand layer on the conveying belt is dynamically disturbed and loosened. The effective adsorption surface at the bottom of the iron remover is uniformly covered on the material flow area of the conveying belt through reciprocating movement. The iron removing blind area is eliminated through the reciprocating sweeping adsorption effect, in which the front end of the fixed iron remover is saturated and the rear end is idle.

Description

Technical Field

[0001] This invention relates to the field of casting sand feeding, specifically to a casting sand feeding device for metal parts production. Background Technology

[0002] Foundry sand is a granular refractory material used in sand casting to manufacture molds and cores. It is a key raw material that supports the formation of liquid metal and determines the precision and quality of castings. It is usually not a single component, but a complex system composed of raw sand, binder, additives and other materials mixed in a certain proportion, and is called molding sand or core sand.

[0003] Before being discharged into the mold, existing foundry sand is usually transported to a sand mixer via a belt conveyor. The sand mixer then discharges the foundry sand and uses it to make sand cores to create the cavity shape of the part. The metal material is then melted into molten metal at high temperature and poured into the sand mold cavity. By allowing it to cool naturally, the molten metal solidifies into a part blank. The outer layer of foundry sand is then removed, and the casting blank is taken out, thus completing the entire production of the metal part.

[0004] In the above process, before the belt conveyor transports the foundry sand, a set of iron removers is usually fixedly installed on the upper part of the belt conveyor (see attached diagram for details). Figure 12 The foundry sand is conveyed to the top of the sand mixer via a belt conveyor. During this process, the iron separator magnetically removes iron nails or wires mixed in with the foundry sand, ensuring that the foundry sand entering the sand mixer will not damage the mixer. However, in actual conveying, the sand layer thickness varies, and the iron nails or wires mixed in are buried at the bottom of the foundry sand. It is difficult for the iron separator alone to magnetically remove the iron nails or wires at the bottom. When the missed iron nails or wires enter the sand mixer with the belt conveyor, they are very likely to get tangled in the mixing blades of the sand mixer, thus jamming the hopper, causing the equipment to stall and overload, and affecting the overall service life of the sand mixer.

[0005] In summary, during the actual conveying of foundry sand, the above-mentioned structure cannot effectively remove iron nails or wires from the bottom using magnetic attraction by relying solely on the iron separator, which severely impacts the overall service life of the sand mixer. Summary of the Invention

[0006] Based on this, the purpose of this invention is to provide a casting sand feeding device for metal parts production, so as to solve the technical problem that in the actual process of conveying casting sand, it is difficult to magnetically remove iron nails or iron wires at the bottom by relying solely on the iron remover, which greatly affects the service life of the sand mixer.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a casting sand feeding device for metal parts production, comprising a base and a frame, wherein a conveyor belt is rotatably arranged on the base, an iron removal component is arranged at the top of the conveyor belt within the frame, a low-frequency vibration component is arranged on the base at the conveyor belt, and a reciprocating sliding component that cooperates with the iron removal component is arranged within the frame.

[0008] The low-frequency vibration component includes a rotating component disposed in the middle of the conveyor belt interlayer. The rotating component is connected to the output end of the conveyor belt via a pulley drive, and the pulley is used for the rotating component to rotate synchronously with the conveyor belt.

[0009] The reciprocating sliding assembly includes a toothed ring plate disposed on one side of the iron removal assembly. A transmission mechanism is disposed on one side of the rotating component, wherein the other end of the transmission mechanism passes through the frame and is connected to a residual gear, which is used to drive the toothed ring plate to reciprocate.

[0010] By adopting the above technical solution, the conveyor belt driven by the rotating component generates low-frequency periodic vibration. This vibration can dynamically disturb and loosen the casting sand layer on the conveyor belt, breaking the static accumulation state of the sand. This allows the ferromagnetic impurities buried at the bottom of the material layer to be fully exposed to the surface of the material layer and the effective area of ​​the magnetic field of the iron separator, thereby significantly improving the magnetic adsorption and impurity removal efficiency of the upper iron removal component. This reciprocating motion allows the effective adsorption surface at the bottom of the iron separator to evenly cover the material flow area of ​​the conveyor belt, preventing iron impurities from accumulating in a local area of ​​the iron separator and forming a magnetic shield. Through the reciprocating sweeping adsorption action, the entire adsorption surface of the iron separator can be fully utilized, eliminating the iron removal blind zone where the front end of the fixed iron separator is saturated and the rear end is idle.

[0011] The present invention is further configured such that the inner wall of the frame is provided with a sliding groove, and sliders that cooperate with the sliding groove are provided on both sides of the iron removal assembly.

[0012] Preferably, the cooperation between the slide groove and the slider ensures the stability of the iron removal assembly sliding inside the frame, effectively preventing the iron removal assembly from tilting or slipping.

[0013] The present invention is further configured such that a guide post is elastically arranged in the vertical direction within the groove, and a puncture component is connected to the bottom of the guide post, and the slider is used to squeeze the guide post to perform reciprocating sliding in the vertical direction.

[0014] Preferably, during the reciprocating sliding process of the iron removal component, the slider repeatedly squeezes the guide post, driving the piercing component at the bottom to perform periodic reciprocating piercing motion, actively breaking up the agglomerated foundry sand on the conveyor belt. This design can break the agglomeration of the sand, exposing the iron impurities wrapped inside the agglomerates, and achieving thorough impurity removal in conjunction with the front-end iron removal component. At the same time, the loosened sand can be evenly fed into the sand mixer.

[0015] The present invention is further configured such that the puncture assembly includes a vertical plate and puncture rods, and multiple sets of puncture rods are provided at the bottom of the vertical plate, and the puncture rods are arranged in an alternating manner.

[0016] Preferably, as the guide post moves downward, it squeezes the vertical plate, causing the bottom piercing rod to move downward, thus breaking up the aggregated casting sand. Furthermore, the staggered arrangement of the piercing rods improves the overall breaking-up effect.

[0017] The present invention is further configured such that the iron removal assembly includes a sliding frame and an iron remover, wherein the toothed ring plate is located on one side of the sliding frame, the iron remover is connected to the bottom of the sliding frame, and the iron remover is detachably mounted on the sliding frame.

[0018] Preferably, during the process of the transmission mechanism driving the residual gear to rotate, the residual gear will mesh with the toothed ring plate on one side of the sliding frame, thereby realizing that the residual gear and the toothed ring plate drive the sliding frame itself to slide back and forth, so that the iron remover moves along the inside of the frame.

[0019] The present invention is further configured such that the transmission mechanism includes a driving disc, a transmission belt and a driven disc, the driving disc and the driven disc are connected by the transmission belt, one end of the rotating member is connected to the driving disc, one end of the driven disc is connected to the residual gear, and the diameter of the driving disc in the transmission mechanism is larger than the diameter of the driven disc.

[0020] Preferably, during the rotation of the rotating component, it drives the driving disc at one end to rotate. Under the action of the transmission belt, the driven disc follows and rotates, thereby driving the residual gear to rotate. Since the diameter of the driving disc in the transmission mechanism is larger than the diameter of its driven disc, when the rotating component rotates slowly for a certain number of revolutions, its driven disc will drive the residual gear to rotate several times, ensuring the reciprocating sliding speed of the sliding frame within the frame.

[0021] The invention is further configured such that the inner wall of the frame is provided with a slot, a compression spring is installed in the slot, and the top of the compression spring is connected to the puncture assembly.

[0022] Preferably, when the guide post slides downward under the pressure of the slider, the compression spring at the bottom of the guide post is in a compressed state. When the slider is reset and the limit on the guide post is released, the guide post will be driven to move upward under the action of the compression spring. The reciprocating sliding of the slider enables the piercing component at the bottom of the guide post to reciprocate to pierce the casting sand in the agglomerated state at the top of the conveyor belt.

[0023] The present invention is further configured such that a stepper motor is provided on one side of the base, wherein the stepper motor is used to drive the conveyor belt at the output end to rotate.

[0024] Preferably, the stepper motor facilitates the operator's control of the conveyor belt's rotation speed, thus improving the overall practicality of the device.

[0025] The present invention is further configured such that the sidewall of the slider and the top of the guide post are both provided with arc-shaped end faces, and a smooth surface is provided at the arc-shaped end faces of both.

[0026] Preferably, the arc-shaped end face prevents the slider from getting stuck on the top of the guide post during sliding, and the smooth surface effectively reduces the sliding friction between the two, improving the sliding stability between the guide post and the slider.

[0027] In summary, the present invention has the following main beneficial effects:

[0028] 1. This invention features a rotating component mounted on the base between the conveyor belts. The output end of the rotating component is connected to the output end of the conveyor belt via a pulley drive. During the process of workers laying casting sand on the conveyor belt, the rotating component drives the conveyor belt to generate low-frequency periodic vibrations. This vibration causes dynamic disturbance and loosening of the casting sand layer on the conveyor belt, breaking the static accumulation state of the sand. This allows ferromagnetic impurities buried at the bottom of the material layer to be fully exposed to the surface of the material layer and the effective area of ​​the magnetic field of the iron remover. This significantly improves the magnetic removal efficiency of the upper iron removal component, significantly reduces the probability of blade entanglement, jamming, and equipment overload damage in the sand mixer, and improves the operational stability and service life of the equipment.

[0029] 2. This invention features a residual gear mounted on a frame that engages with a rotating component, and a toothed ring plate on one side of the iron removal assembly that meshes with the residual gear. Driven by the power source of the conveyor belt, the iron removal assembly performs a periodic reciprocating linear motion along the conveyor belt's conveying direction. This reciprocating motion ensures that the effective adsorption surface at the bottom of the iron remover can evenly cover the material flow area of ​​the conveyor belt, preventing iron impurities from accumulating in localized areas of the iron remover and forming magnetic shielding. This ensures that the magnetic field strength of the iron remover remains stable and effective throughout the entire adsorption cycle. Simultaneously, through the reciprocating sweeping adsorption action, the entire adsorption surface of the iron remover can be fully utilized, eliminating the iron removal blind zone where the front end of a fixed iron remover is saturated and the rear end is idle. This significantly improves iron removal efficiency and adsorption surface utilization, effectively extending the operation cycle of manually cleaning the iron remover.

[0030] 3. This invention features a sliding groove on the inner wall of the frame, with sliding blocks on both sides of the iron removal component to cooperate with it. During the reciprocating sliding of the iron removal component, the sliding blocks repeatedly squeeze the guide post, causing the piercing component at the bottom to perform a periodic reciprocating piercing motion, actively breaking up the agglomerated foundry sand on the conveyor belt. This design can break up the agglomerated state of the sand, exposing the iron impurities wrapped inside the agglomerated material. Combined with the front-end iron removal component, it can achieve thorough impurity removal. At the same time, the loosened sand can be evenly fed into the sand mixer, avoiding uneven coating of the solidifying agent due to foundry sand agglomeration, ensuring the accuracy of the sand mixing ratio and the quality of the sand mold, and significantly improving the working efficiency and quality of the subsequent sand mixer. Attached Figure Description

[0031] Figure 1 This is a perspective view of the present invention;

[0032] Figure 2 This is a schematic diagram of the iron removal component of the present invention at its middle position;

[0033] Figure 3 This is a schematic diagram of the iron removal assembly of the present invention in the adjustment state;

[0034] Figure 4 This is an exploded view of the iron removal assembly and puncture assembly of the present invention;

[0035] Figure 5 This is a cross-sectional view of the present invention;

[0036] Figure 6 This is an exploded view of the rotating component and iron removal assembly of the present invention;

[0037] Figure 7 For the present invention Figure 6 Enlarged view of A in the middle;

[0038] Figure 8 This is a schematic diagram of the iron removal assembly structure of the present invention;

[0039] Figure 9 This is a partial structural diagram of the second embodiment of the present invention;

[0040] Figure 10 For the present invention Figure 9 Enlarged view of B in the middle;

[0041] Figure 11 This is a schematic diagram of the puncture assembly structure of the present invention;

[0042] Figure 12 This is a schematic diagram of the conveyor structure in the prior art of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Base; 2. Frame; 3. Iron removal assembly; 301. Sliding frame; 302. Iron remover; 4. Stepper motor; 5. Conveyor belt; 6. Transmission mechanism; 7. Puncture assembly; 701. Vertical plate; 702. Puncture rod; 8. Toothed ring plate; 9. Residual gear; 10. Slider; 11. Guide post; 12. Rotating component; 13. Compression spring. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] The embodiments of the present invention will now be described.

[0047] Example 1: Please refer to Figures 1-11 The device for feeding casting sand in metal parts production includes a base 1, a frame 2, an iron removal component 3, a reciprocating sliding mechanism, a dispersing mechanism and a transmission mechanism 6. A stepper motor 4 is provided on one side of the base 1. The stepper motor 4 is used to drive the conveyor belt 5 at the output end to rotate. The operator lays the casting sand on the surface of the conveyor belt 5 and then starts the stepper motor 4. Under the action of the stepper motor 4, the conveyor belt 5 is driven to feed the casting sand to the feed port at the top of the sand mixer.

[0048] Because a rotating component 12 is installed in the middle of the conveyor belt 5, and the rotating component 12 is connected to the output end of the conveyor belt 5 through a belt pulley, the rotating component 12 drives the conveyor belt 5 to generate low-frequency periodic vibration. This vibration can cause dynamic disturbance and loosening of the casting sand layer on the conveyor belt 5, breaking the static accumulation state of the sand. Furthermore, an iron removal component 3 is installed at the top of the conveyor belt 5 within the frame 2. Through the iron removal component 3, ferromagnetic impurities buried at the bottom of the material layer can be fully exposed to the surface of the material layer and the effective area of ​​the magnetic field of the iron removal component 3, thereby significantly improving the magnetic removal efficiency of the upper iron removal component 3, significantly reducing the probability of blade entanglement, jamming and equipment overload damage of the sand mixer, and improving the stability and service life of the equipment.

[0049] Meanwhile, a transmission mechanism 6 is provided on the toothed ring plate 8 on one side of the iron removal component 3 and on the side of the rotating part 12. The other end of the transmission mechanism 6 passes through the frame 2 and is connected to a residual gear 9. The residual gear 9 is used to drive the toothed ring plate 8 to slide back and forth, so as to realize the linkage drive of the power source of the conveyor belt 5, which drives the iron removal component 3 to make periodic reciprocating linear motion along the conveying direction of the conveyor belt 5. This reciprocating motion allows the effective adsorption surface at the bottom of the iron remover 302 to evenly cover the material flow area of ​​the conveyor belt, avoiding the accumulation of iron impurities in local areas of the iron remover to form a magnetic shield. This ensures that the magnetic field strength of the iron remover 302 remains stable and effective throughout the adsorption cycle. At the same time, through the reciprocating sweeping adsorption action, the entire adsorption surface of the iron remover 302 can be fully utilized, eliminating the iron removal blind zone where the front end of the fixed iron remover 302 is saturated and the rear end is idle, greatly improving the iron removal efficiency and adsorption surface utilization rate, and effectively extending the operation cycle of manual cleaning of the iron remover.

[0050] For details regarding the above embodiments, please refer to [link / reference]. Figure 4 The inner wall of the frame 2 is provided with a sliding groove, and sliders 10 that cooperate with the sliding groove are provided on both sides of the iron removal component. Through the cooperation of the sliding groove and the sliders 10, the stability of the iron removal component 3 sliding inside the frame 2 is improved, and the iron removal component 3 is effectively prevented from tilting and slipping.

[0051] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 and Figure 3 The transmission mechanism 6 includes a driving disc, a transmission belt, and a driven disc. The driving disc is connected to one end of the rotating member 12, and the driven disc is connected to the residual gear 9 at one end. During the rotation of the rotating member 12, the driving disc at one end will rotate. Under the action of the transmission belt, the driven disc will follow and rotate, thereby driving the residual gear 9 to rotate. Since the diameter of the driving disc in the transmission mechanism 6 is larger than the diameter of its driven disc, when the rotating member 12 rotates slowly for a certain number of revolutions, its driven disc will drive the residual gear 9 to rotate several times, ensuring the reciprocating sliding speed of the sliding frame 301 within the frame 2.

[0052] For details regarding the above embodiments, please refer to [link / reference]. Figure 8The iron removal component 3 includes a sliding frame 301 and an iron remover 302. The toothed ring plate 8 is located on one side of the sliding frame 301, and the iron remover 302 is connected to the bottom of the sliding frame 301. The iron remover 302 is detachably mounted on the sliding frame 301. During the rotation of the residual gear 9 driven by the transmission mechanism 6, the residual gear 9 will mesh with the toothed ring plate 8 on one side of the sliding frame 301. This enables the sliding frame 301 to slide back and forth through the residual gear 9 and the toothed ring plate 8, so that the iron remover 302 moves along the inside of the frame 2. The iron remover 302 weighs 30kg and can easily slide back and forth under the action of the residual gear 9 and the toothed ring plate 8. The magnetic field strength of the iron remover 302 is 70mT, which is sufficient for iron removal during the casting sand conveying process.

[0053] Example 2: Please refer to Figures 9-11 The device for feeding foundry sand in metal parts production shown has an overall structure similar to that of Embodiment 1. A guide post 11 is elastically arranged vertically within the chute, and a piercing component 7 is connected to the bottom of the guide post 11. A slider 10 is used to press the guide post 11, causing it to slide back and forth vertically. During the reciprocating sliding of the iron removal component 3, the slider 10 repeatedly presses the guide post 11, driving the piercing component 7 at the bottom to perform periodic reciprocating piercing motions. This actively disperses the agglomerated foundry sand on the conveyor belt 5. This design breaks up the agglomerated state of the sand, exposing the iron impurities encased within the agglomerated material. Combined with the front-end iron removal component, this achieves thorough impurity removal. Simultaneously, the dispersed loose sand can uniformly enter the sand mixer, avoiding uneven coating of the hardener due to foundry sand agglomeration, ensuring the accuracy of the sand mixing ratio and the quality of the sand mold, and significantly improving the working efficiency and quality of the subsequent sand mixer.

[0054] For details regarding the above embodiments, please refer to [link / reference]. Figure 11 The piercing assembly 7 includes a vertical plate 701 and piercing rods 702. Multiple sets of piercing rods 702 are provided at the bottom of the vertical plate 701, and the piercing rods 702 are arranged in an alternating manner. As the guide post 11 moves downward, it will squeeze the vertical plate 701, causing the piercing rods 702 at the bottom to move downward, thus completing the dispersing operation of the aggregated casting sand. The alternating arrangement of the piercing rods 702 improves the overall dispersing effect.

[0055] For details regarding the above embodiments, please refer to [link / reference]. Figure 10The inner wall of the frame 2 is provided with a slot, and a compression spring 13 is installed in the slot. The top of the compression spring 13 is connected to the piercing assembly 7. When the guide post 11 slides downward under the pressure of the slider 10, the compression spring 13 at the bottom of the guide post 11 will be in a compressed state. When the slider 10 is reset and releases the limit on the guide post 11, it will drive the guide post 11 to move upward under the action of the compression spring 13. The reciprocating sliding of the slider 10 realizes that the piercing assembly 7 at the bottom of the guide post 11 reciprocates to pierce the casting sand in the agglomerated state at the top of the conveyor belt 5.

[0056] In practical operation, the present invention involves the following steps: The worker lays casting sand on the surface of the conveyor belt 5, then feeds the sand towards the feed inlet at the top of the sand mixer via the conveyor belt 5. During this process, an iron removal component 3 is installed at the top of the base 1, and a rotating component 12 is installed in the middle layer of the conveyor belt 5. This rotating component 12 rotates via the conveyor belt 5, causing the conveyor belt 5 to vibrate and loosen, thus breaking the static accumulation of the sand and exposing ferromagnetic impurities buried at the bottom of the material layer to the surface. The iron removal component 3 at the top then performs fine screening of the ferromagnetic impurities, significantly improving the magnetic removal efficiency of the iron removal component 3. This significantly reduces the probability of subsequent sand mixer blade entanglement, jamming, and equipment overload damage, thereby improving the equipment's operational stability and service life.

[0057] Furthermore, a transmission mechanism 6 is provided on one side of the frame 2. One end of the transmission mechanism 6 is connected to the rotating part 12, and the other end passes through the frame 2 and is connected to the residual gear 9. A toothed ring plate 8 is provided on the sliding frame 301 on the iron removal assembly 3. Through the toothed ring plate 8 meshing with the residual gear 9, the iron removal assembly 3 is driven to make periodic reciprocating linear motion along the conveying direction of the conveyor belt 5. This reciprocating motion allows the effective adsorption surface at the bottom of the iron remover 302 to evenly cover the material flow area of ​​the conveyor belt. At the same time, through the reciprocating sweeping adsorption action, the entire adsorption surface of the iron remover 302 can be fully utilized, eliminating the iron removal blind zone where the front end of the fixed iron remover 302 is saturated and the rear end is idle, greatly improving the iron removal efficiency and adsorption surface utilization rate, and effectively extending the operation cycle of manually cleaning the iron remover.

[0058] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A casting sand feeding device for metal parts production, comprising a base (1) and a frame (2), wherein a conveyor belt (5) is rotatably mounted on the base (1), and an iron removal assembly (3) is disposed on top of the conveyor belt (5) within the frame (2), characterized in that: A low-frequency vibration component is provided on the base (1) at the conveyor belt (5), and a reciprocating sliding component that cooperates with the iron removal component (3) is provided in the frame (2). The low-frequency vibration component includes a rotating part (12) disposed in the middle of the conveyor belt (5). The rotating part (12) is connected to the output end of the conveyor belt (5) through a belt pulley, and the belt pulley is used for the rotating part to rotate synchronously with the conveyor belt (5). The reciprocating sliding assembly includes a toothed ring plate (8) disposed on one side of the iron removal assembly (3), and a transmission mechanism (6) is disposed on one side of the rotating part (12), wherein the other end of the transmission mechanism (6) passes through the frame (2) and is connected to a residual gear (9), which is used to drive the toothed ring plate (8) to reciprocate.

2. The casting sand feeding device for metal parts production according to claim 1, characterized in that: The inner wall of the frame (2) is provided with a sliding groove, and the iron removal assembly (3) is provided with sliders (10) that cooperate with the sliding groove on both sides.

3. The metal parts production casting sand feeding device according to claim 2, characterized in that: A guide post (11) is elastically arranged vertically in the groove, and a puncture assembly (7) is connected to the bottom of the guide post (11). The slider (10) is used to squeeze the guide post (11) to reciprocate in the vertical direction.

4. The casting sand feeding device for metal parts production according to claim 3, characterized in that: The puncture assembly (7) includes a vertical plate (701) and puncture rods (702). Multiple sets of puncture rods (702) are provided at the bottom of the vertical plate (701), and the puncture rods (702) are arranged in an alternating manner.

5. The casting sand feeding device for metal parts production according to claim 1, characterized in that: The iron removal assembly (3) includes a sliding frame (301) and an iron remover (302), wherein the toothed ring plate (8) is located on one side of the sliding frame (301), and the iron remover (302) is connected to the bottom of the sliding frame (301), and the iron remover (302) is detachably mounted on the sliding frame (301).

6. The casting sand feeding device for metal parts production according to claim 1, characterized in that: The transmission mechanism (6) includes a driving disc, a transmission belt and a driven disc. The driving disc and the driven disc are connected by the transmission belt. One end of the rotating part (12) is connected to the driving disc, and one end of its driven disc is connected to the residual gear (9). The diameter of the driving disc in the transmission mechanism (6) is larger than the diameter of its driven disc.

7. The casting sand feeding device for metal parts production according to claim 1, characterized in that: The inner wall of the frame (2) is provided with a slot, and a compression spring (13) is installed in the slot, and the top of the compression spring (13) is connected to the puncture assembly (7).

8. A casting sand feeding device for metal parts production according to claim 1, characterized in that: A stepper motor (4) is provided on one side of the base (1), wherein the stepper motor (4) is used to drive the conveyor belt (5) at the output end to rotate.

9. A casting sand feeding device for metal parts production according to claim 2, characterized in that: The sidewall of the slider (10) and the top of the guide post (11) are both provided with arc-shaped end faces, and smooth surfaces are provided at the arc-shaped end faces of both.

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