A casting sand grinding device with adjustable fineness

Abstract

The present application relates to mechanical equipment technical field, disclose a kind of casting sand grinding device with adjustable fineness, including the grinding cylinder being switched between first connecting plate and second connecting plate, first connecting plate is equipped with feed inlet being communicated with the inner chamber of grinding cylinder, and the cross section of inner chamber of grinding cylinder is regular hexagon;Grinding seat is fixed in grinding cylinder;Screening seat is fixedly connected in the top end of grinding seat, and screening seat is provided with screen cloth, the bottom surface of screen cloth is communicated with the inner chamber of grinding seat, and the inner chamber of grinding seat is communicated with discharge pipe on one side, and the top surface of screen cloth is communicated with separation pipe on one side, and separation pipe is provided with movable switch.The present application can separate the casting sand that has reached grinding standard in grinding process in time, improve processing efficiency, and through the control cooperation of separation pipe and movable switch, not only can the casting sand that has not been ground up to standard be repeatedly ground, but also the grinding medium can be selectively replaced, the grinding fineness of casting sand is adjusted flexibly and efficiently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical equipment, in particular to a casting sand grinding device with adjustable fineness. BACKGROUND

[0002] Casting sand is a granular refractory material used to prepare molding sand or core sand in the casting process. In the processing of casting sand, stone blocks need to be crushed, and then the crushed stone blocks are ground by a grinding device to form small granular casting sand with high circularity (angular factor less than 1.35) and suitable for casting molding materials. The casting sand and the grinding medium are separated by a centrifugal separation device in the grinding device. Since the particle shape and composition of the casting sand have a great influence on the flowability, compactness, gas evolution, permeability, strength and resistance to liquid metal penetration of the molding sand, and also have a great influence on the amount of binder added during the molding sand preparation process, ultimately affecting the quality and performance of the casting product, therefore, the selective adjustment of the grinding shape and fineness of the casting sand is an important indicator of the grinding quality of the casting sand.

[0003] However, in the prior art such as a recycling casting molding sand screening device with patent number CN120438534A, an abrasive surface is formed by the cooperation of a grinding cylinder and a liner ring to achieve grinding of the casting sand, avoiding the subsequent screening problem. However, the grinding fineness of the casting sand is small, and the grinding medium mixed sandstone is used for grinding, which leads to the inability of the prior art to effectively separate the grinding medium and the casting sand, and further unable to adjust the grinding fineness of the casting sand by replacing the grinding medium, resulting in certain use defects of the prior art for grinding of the casting sand. Therefore, there is an urgent need for a casting sand grinding device with adjustable fineness to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a casting sand grinding device with adjustable fineness to solve the above problems existing in the prior art and to effectively adjust the grinding fineness of the casting sand.

[0005] To achieve the above purpose, the present application provides the following solution: the present application provides a casting sand grinding device with adjustable fineness, comprising:

[0006] a first connecting plate and a second connecting plate fixed to the top surface of the base;

[0007] a grinding cylinder connected between the first connecting plate and the second connecting plate, a feed inlet is formed on the first connecting plate, the feed inlet is in communication with the inner cavity of the grinding cylinder, a driving member connected with the grinding cylinder is arranged on the base, and the cross section of the inner cavity of the grinding cylinder is a regular hexagon;

[0008] A grinding seat is fixed in the grinding cylinder and the bottom end of the grinding seat matches the inner cavity of the grinding cylinder to form a grinding surface;

[0009] A screening seat is fixed at the top end of the grinding seat, a screen is arranged in the screening seat, the bottom surface of the screen is communicated with the inner cavity of the grinding seat, one side of the inner cavity of the grinding seat is communicated with a discharge pipe, one end of the discharge pipe extends out of the second connecting plate, one side of the top surface of the screen is communicated with a separation pipe, and a movable switch is arranged on the separation pipe.

[0010] Preferably, one side of the screening seat is provided with a separation opening, the top surface of the screen extends downwardly and downwardly towards the separation opening, the separation pipe extends out of the first connecting plate and downwardly away from the screening seat, the top end of the separation pipe is fixedly connected with a first cover plate, and the movable switch comprises a baffle slidably connected in the separation pipe.

[0011] Preferably, a through groove is arranged at the bottom end of the separation pipe and below the first cover plate, a movable plate is slidably connected in the through groove, the top end of the movable plate extends to the side wall surface of the separation pipe and is fixedly connected with a transmission rod, a sliding groove is arranged in the side wall surface of the separation pipe, the transmission rod is slidably connected in the sliding groove, one end of the transmission rod extends into the separation pipe, a pull rod is fixedly connected between the baffle and the transmission rod, and a positioning pin is vertically arranged on the first cover plate.

[0012] Preferably, a guide plate is fixedly connected in the inner cavity of the grinding seat, one side of the grinding seat is provided with a discharge opening, the top surface of the guide plate extends downwardly and downwardly towards the discharge opening, the discharge opening is fixedly connected with the discharge pipe, and the discharge pipe is distributed downwardly away from the grinding seat.

[0013] Preferably, a counterweight is fixedly connected at the bottom end of the inner cavity of the grinding seat, and a vibration motor is fixedly connected to the bottom surface of the guide plate.

[0014] Preferably, the driving member comprises:

[0015] A driving motor is fixedly connected to the top surface of the base, and an output shaft of the driving motor is connected with a belt pulley through a shaft coupling.

[0016] A transmission belt is sleeved on the belt pulley and the outer ring of the grinding cylinder.

[0017] Preferably, the bottom surface of the grinding seat is circular arc-shaped, and the bottom surface of the grinding seat is fixed with a plurality of grinding protrusions in an array, and the grinding protrusions are not in contact with the inner wall surface of the grinding cylinder.

[0018] Preferably, the grinding seat is fixed with a first support rod near one side of the separation pipe, the first support rod extends out of the first connecting plate and is fixed with a first fixing rod, the bottom end of the first fixing rod is fixed with the base, and the screening seat is fixed with a second support rod near one side of the discharge pipe, the second support rod extends out of the second connecting plate and is fixed with a second fixing rod, and the bottom end of the second fixing rod is fixed with the base.

[0019] Preferably, the two ends of the grinding cylinder are open ends, the inner ring side of the two ends of the grinding cylinder is connected to the first connecting plate and the second connecting plate through a sealing bearing, and the diameter of the inner ring side of the sealing bearing is smaller than the diameter of the inner cavity of the grinding cylinder.

[0020] Preferably, a feeding pipe is fixed in the feeding port, and the projection of the feeding port in the horizontal direction is located in the inner ring side of the sealing bearing.

[0021] The present application discloses the following technical effects:

[0022] The present application provides rotational power through the driving member, the inner cavity of the grinding cylinder is designed as a regular hexagonal prism structure, the grinding medium is fed into the grinding cylinder, the casting sand is ground during the rotation of the grinding cylinder, and the grinding seat is fixed in the grinding cylinder, the bottom end of the grinding seat cooperates with the inner wall surface of the grinding cylinder to form a grinding surface, and the grinding force is enhanced.

[0023] During the rotation of the grinding cylinder, the casting sand squeezed by the grinding seat and the grinding cylinder is fixed at the inner cavity joint of the grinding cylinder, the casting sand is turned and lifted by the rotational force of the grinding cylinder and the limiting action of the regular hexagonal prism, part of the casting sand and the grinding medium fall on the top surface of the screening seat under the action of gravity, and are directly sieved through the screen, only the casting sand that meets the screening requirements of the screen after repeated grinding and rotation is leaked into the grinding seat, and is discharged from the grinding cylinder through the discharge pipe, and the grinding medium with high wear resistance and the casting sand that is not fully ground can enter the separation pipe from the top surface of the screen, the separation pipe is controlled by the movable switch, the separation pipe is communicated with the inner cavity of the grinding cylinder during grinding, and the casting sand is fully ground, when the grinding fineness needs to be adjusted, the movable switch is communicated with the outside, so that the original grinding medium is discharged from the grinding cylinder, and new grinding medium is fed into the grinding cylinder through the feeding port, so that the grinding fineness is adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the scope of protection of the present application.

[0025] Figure 1 The structure of the grinding cylinder in the present application is shown in the figure.

[0026] Figure 2 The connection relationship between the sealing bearing and the grinding cylinder in the present application is shown in the figure.

[0027] Figure 3 The connection relationship between the grinding seat and the guide plate in the present application is shown in the figure.

[0028] Figure 4 The connection relationship between the counterweight and the grinding seat in the present application is shown in the figure.

[0029] Figure 5 The connection relationship between the pull rod and the baffle in the present application is shown in the figure.

[0030] Figure 6 The connection relationship between the positioning pin and the baffle in the present application is shown in the figure.

[0031] 1, base; 2, first connecting plate; 3, second connecting plate; 4, grinding cylinder; 5, grinding seat; 6, screening seat; 7, screen; 8, discharge pipe; 9, separation pipe; 10, first cover plate; 11, through groove; 12, movable plate; 13, transmission rod; 14, pull rod; 15, baffle; 16, positioning pin; 17, guide plate; 18, second cover plate; 19, counterweight; 20, vibration motor; 21, drive motor; 22, shaft coupling; 23, transmission belt; 24, pulley; 25, grinding convex; 26, first support rod; 27, first fixed rod; 28, second support rod; 29, second fixed rod; 30, sealing bearing; 31, feed pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art without creative effort based on these embodiments also belong to the scope of protection of the present application.

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0034] ReferenceFigures 1-6 The application provides a casting sand grinding device with adjustable fineness, which comprises a base 1, a first connecting plate 2 and a second connecting plate 3 fixed to the top surface of the base 1, a grinding cylinder 4 connected between the first connecting plate 2 and the second connecting plate 3, a feeding port formed in the first connecting plate 2 and communicated with the inner cavity of the grinding cylinder 4, a driving member arranged on the base 1 and connected with the grinding cylinder 4, and a grinding seat 5 fixed in the grinding cylinder 4 and having a bottom end matched with the inner cavity of the grinding cylinder 4 to form a grinding surface.

[0035] The first connecting plate 2 and the second connecting plate 3 are fixed to the top surface of the base 1.

[0036] The grinding cylinder 4 is connected between the first connecting plate 2 and the second connecting plate 3, the feeding port is formed in the first connecting plate 2 and communicated with the inner cavity of the grinding cylinder 4, the base 1 is provided with the driving member connected with the grinding cylinder 4, and the cross section of the inner cavity of the grinding cylinder 4 is a regular hexagon.

[0037] The grinding seat 5 is fixed in the grinding cylinder 4 and has a bottom end matched with the inner cavity of the grinding cylinder 4 to form the grinding surface.

[0038] The screening seat 6 is fixed to the top end of the grinding seat 5, the screening seat 6 is provided with a screen 7, the bottom surface of the screen 7 is communicated with the inner cavity of the grinding seat 5, one side of the inner cavity of the grinding seat 5 is communicated with a discharging pipe 8, one end of the discharging pipe 8 extends out of the second connecting plate 3, one side of the top surface of the screen 7 is communicated with a separation pipe 9, and the separation pipe 9 is provided with a movable switch.

[0039] The application has the advantages that the grinding cylinder 4 is connected between the first connecting plate 2 and the second connecting plate 3, the driving member provides rotating power, the inner cavity of the grinding cylinder 4 is designed as a regular hexagonal prism structure, the grinding medium is fed into the grinding cylinder 4, the casting sand is ground in the rotating process of the grinding cylinder 4, the grinding seat 5 is fixed in the grinding cylinder 4, the bottom end of the grinding seat 5 is matched with the inner wall of the grinding cylinder 4 to form the grinding surface, the grinding force is enhanced, the casting sand fixed in the grinding cylinder 4 is extruded by the grinding seat 5 and the grinding cylinder 4 in the rotating process of the grinding cylinder 4, the casting sand is turned and lifted by the rotating force of the grinding cylinder 4 and the limiting effect of the regular hexagonal prism on the casting sand, part of the casting sand and the grinding medium fall on the top surface of the screening seat 6 by gravity and are directly screened through the screen 7, only the casting sand meeting the screening requirement of the screen 7 is leaked into the grinding seat 5 and discharged from the grinding cylinder 4 through the discharging pipe 8, the grinding medium with high wear resistance and the casting sand not fully ground can enter the separation pipe 9 from the top surface of the screen 7, the separation pipe 9 is controlled by the movable switch, the separation pipe 9 is communicated with the inner cavity of the grinding cylinder 4 in the grinding process, the casting sand is fully ground, the movable switch is communicated with the outside when the grinding fineness needs to be adjusted, the original grinding medium is discharged from the grinding cylinder 4, and the new grinding medium is fed into the grinding cylinder 4 through the feeding port, so that the grinding fineness is adjusted.

[0040] Specifically, the grinding medium diameter is larger than the casting sand particle size required to be prepared, the grinding medium of different sizes is replaced through the structure of the technical solution, the grinding fineness of the casting sand is adjusted, the grinding medium adopts common chromium steel ball, the screen 7 is a metal structure, the screen opening formed on the screen 7 can strictly control the fineness standard of the screened casting sand, the screen 7 is threadedly connected with the screening seat 6 by screwing a plurality of bolts on the side wall surface of the screening seat 6, the screen 7 is detachably replaced, and the screening specification of the casting sand grinding fineness is adjusted. The above-mentioned screwing and unscrewing of the screen 7 is a conventional technology, and will not be described in detail.

[0041] Further, a separation opening is formed on one side of the screening seat 6, the top surface of the screen 7 extends downwardly and downwardly towards the separation opening, the separation pipe 9 extends downwardly and downwardly away from the screening seat 6 and the first connecting plate 2, the top end of the separation pipe 9 is fixedly connected with the first cover plate 10, and the movable switch comprises a baffle 15 slidably connected in the separation pipe 9. The baffle 15 and the first cover plate 10 have a switchable fixed or movable state.

[0042] By designing the screen 7 into a structure with the top surface inclined downwardly, the casting sand and the grinding medium that have not fallen through the screen 7 move towards the separation opening as the screening proceeds, the first cover plate 10 fixedly connected at the top end of the separation pipe 9 can not only prevent the casting sand from being directly poured into the separation pipe 9 when the grinding cylinder 4 is stirred, but also realize the arrangement of the movable switch by the first cover plate 10 and the baffle 15 having a switchable fixed or movable state.

[0043] Further, a through groove 11 is formed at the bottom end of the separation pipe 9, the through groove 11 is arranged directly below the first cover plate 10, an activity plate 12 is slidably connected in the through groove 11, a transmission rod 13 is fixedly connected at the top end of the activity plate 12 and extends to the side wall surface of the separation pipe 9, a sliding groove is formed on the side wall surface of the separation pipe 9, the transmission rod 13 is slidably connected in the sliding groove, one end of the transmission rod 13 extends into the separation pipe 9, a pull rod 14 is fixedly connected between the baffle 15 and the transmission rod 13, and a positioning pin 16 is vertically penetrated in the first cover plate 10. When the baffle 15 is fixed with the positioning pin 16, the through groove 11 is vertically penetrated, and when the baffle 15 is movable relative to the positioning pin 16, the activity plate 12 blocks the through groove 11.

[0044] Specifically, the baffle 15 and the first cover plate 10 adjust the movable or fixed state through the positioning pin 16, the pull rod 14 pushes the transmission rod 13 by pushing the baffle 15 into the grinding cylinder 4, the transmission rod 13 is slidably driven to move the activity plate 12, the through groove 11 is opened, and the baffle 15 is fixed through the positioning pin 16. When the casting sand and the grinding medium move along the separation pipe 9, they directly fall back into the grinding cylinder 4 from the through groove 11, and the repeated grinding is realized.

[0045] When the baffle 15 is pulled out, the pull rod 14 drives the transmission rod 13 to move the movable plate 12, so that the movable plate 12 blocks the through slot 11, at this time, the baffle 15 extends out of the separation pipe 9, so that the separation pipe 9 communicates the grinding cylinder 4 with the outside, at this time, the residual grinding medium is screened through the screen 7 and directly discharged out of the grinding cylinder 4 along the separation pipe 9, the original grinding medium is discharged, and at the same time, new grinding medium is fed into the grinding cylinder 4 through the feeding port, so that the grinding fineness is adjusted.

[0046] Further, the inner cavity of the grinding seat 5 is fixedly connected with a guide plate 17, one side of the grinding seat 5 is provided with a discharge port, the top surface of the guide plate 17 extends downwardly and downwardly towards the discharge port, the discharge port is fixedly connected with a discharge pipe 8 in communication, and the discharge pipe 8 is distributed downwardly and downwardly away from the grinding seat 5.

[0047] By fixedly connecting the guide plate 17 in the grinding seat 5, the cast sand leaked from the screen 7 is guided to move towards the discharge port and is discharged out of the grinding cylinder 4 through the discharge pipe 8.

[0048] Specifically, the top end of the discharge pipe 8 is fixedly connected with a second cover plate 18 in the area inside the grinding cylinder 4, so as to prevent the grinding medium and the substandard cast sand from being poured into the discharge pipe 8 during the turnover process of the grinding cylinder 4.

[0049] Further, the inner cavity of the grinding seat 5 is fixedly connected with a counterweight 19, and the bottom surface of the guide plate 17 is fixedly connected with a vibration motor 20.

[0050] By fixedly connecting the counterweight 19 in the grinding seat 5, the grinding effect of the inner wall surface of the grinding cylinder 4 is improved, and the vibration motor 20 fixedly connected to the bottom surface of the guide plate 17 transmits the vibration effect to the guide plate 17 and the screen 7, so as to improve the screening and conveying speed of the cast sand.

[0051] Further, the driving member comprises:

[0052] A driving motor 21 is fixedly connected to the top surface of the base 1, and the output shaft of the driving motor 21 is connected with a belt pulley 24 through a shaft coupling 22.

[0053] A transmission belt 23 is sleeved on the outer ring side of the belt pulley 24 and the grinding cylinder 4.

[0054] The output torque is improved by the driving motor 21 and the shaft coupling 22, and an annular groove is formed on the outer peripheral side of the grinding cylinder 4, the two ends of the transmission belt 23 are respectively sleeved on the annular groove and the belt pulley 24, so as to drive the grinding cylinder 4 to rotate by the driving motor 21, the rotating force of the grinding cylinder 4 is enhanced, and the grinding effect is guaranteed.

[0055] In addition, a guide ring is fixedly connected to the outer peripheral side of the grinding cylinder 4, and a guide wheel rotatably connected to the base 1 is used for rotating support, so as to improve the rotating stability of the grinding cylinder 4.

[0056] Further, the bottom surface of the grinding seat 5 is arc-shaped, and the bottom surface of the grinding seat 5 is fixed with a plurality of grinding protrusions 25 in an array, and the grinding protrusions 25 are not in contact with the inner wall surface of the grinding cylinder 4.

[0057] By designing the bottom surface of the grinding seat 5 to be arc-shaped and fixed with a plurality of grinding protrusions 25 on the bottom surface of the grinding seat 5, the contact friction during the grinding of the foundry sand is improved. In addition, during the rotation of the grinding cylinder 4, the inner cavity of the grinding cylinder 4 moves towards the bottom surface of the grinding seat 5. The edge of the arc-shaped surface forms a channel with a hexagonal cross-section, and the width of the channel decreases from large to small. When the bottom surface of the grinding seat 5 and the plane of the inner cavity of the grinding cylinder 4 are close, the channel between them becomes narrow, thereby pushing the foundry sand and enhancing the movement of the foundry sand in the grinding cylinder 4 during the grinding process. It can be understood that the inner wall surface of the grinding cylinder 4 is rough, and the foundry sand is also ground during the process of pushing the foundry sand. Compared with the traditional circular inner cavity, the movement of the foundry sand is improved, and the grinding effect is improved.

[0058] Further, the side of the grinding seat 5 close to the separation pipe 9 is fixed with a first support rod 26, the first support rod 26 extends out of the first connecting plate 2 and is fixed with a first fixed rod 27, the bottom end of the first fixed rod 27 is fixed with the base 1, the side of the screening seat 6 close to the discharge pipe 8 is fixed with a second support rod 28, the second support rod 28 extends out of the second connecting plate 3 and is fixed with a second fixed rod 29, the bottom end of the second fixed rod 29 is fixed with the base 1.

[0059] By fixing the two ends of the grinding seat 5 with the first connecting plate 2 and the second connecting plate 3 through the first support rod 26 and the first fixed rod 27 and the second support rod 28 and the second fixed rod 29, the stability of the grinding seat 5 is maintained. With the rotation of the grinding cylinder 4, the grinding seat 5 rotates relative to the grinding cylinder 4, which realizes the grinding of the circumferential surface of the inner cavity of the grinding cylinder 4. In addition, the foundry sand and the grinding medium turned over during the rotation of the grinding cylinder 4 fall on the screening seat 6 through the action of gravity, which ensures the effective screening of the foundry sand and the function of replacing the grinding medium.

[0060] Further, the two ends of the grinding cylinder 4 are open ends, the inner ring side of the two ends of the grinding cylinder 4 is connected with the first connecting plate 2 and the second connecting plate 3 through the sealing bearing 30, and the inner ring side diameter of the sealing bearing 30 is smaller than the inner cavity diameter of the grinding cylinder 4.

[0061] The two ends of the grinding cylinder 4 are connected with the first connecting plate 2 and the second connecting plate 3 through the sealing bearing 30, and the sealing bearing 30 is smaller than the inner cavity of the grinding cylinder 4, which can effectively provide rotation support for the two ends of the grinding cylinder 4 with a hexagonal prism structure.

[0062] Further, the inlet is fixed with an inlet pipe 31, and the projection of the inlet in the horizontal direction is located in the inner ring side of the sealing bearing 30.

[0063] By opening the feeding port in the inner ring side of the sealing bearing 30, the effect of directly communicating the feeding port with the inner cavity of the grinding cylinder 4 is ensured, and the feeding port is prevented from being blocked during rotation. The feeding pipe 31 fixed in the feeding port is used not only to pass the foundry sand into the grinding cylinder 4, but also to pass the new grinding medium into the grinding cylinder 4 when the grinding medium is replaced.

[0064] The application provides a working principle of a foundry sand grinding device with adjustable fineness.

[0065] Firstly, the foundry sand and the grinding medium are sent into the grinding cylinder 4 from the feeding pipe 31, and the driving motor 21 is started to drive the grinding cylinder 4 to rotate. In the process, the inner wall surface of the grinding cylinder 4 and the grinding seat 5 cooperate to grind the foundry sand. The arc-shaped bottom surface of the grinding seat 5 and the high-wear-resistant material such as the chromium steel ball are used as the grinding medium. Meanwhile, the protruding part of the grinding convex 25 is also a semicircular structure, so as to ensure the roundness of the ground foundry sand, thereby meeting the use requirements for the flowability and the strength of the sand and other quality indicators.

[0066] Moreover, the foundry sand is repeatedly stirred by the grinding cylinder 4, poured into the screening seat 6 from the top, screened by the screen 7, and screened out to the guide plate 17. The foundry sand meeting the fineness requirement is sent out of the grinding cylinder 4 through the discharge pipe 8. The grinding medium and the foundry sand that is not fully ground are sent into the discharge pipe 8 from the top surface of the screen 7. The through slot 11 on the discharge pipe 8 is opened or blocked by the push-pull baffle 15. When the through slot 11 is opened, the grinding medium and the foundry sand that is not fully ground can be re-passed into the grinding cylinder 4 for repeated grinding. Or the through slot 11 is blocked, so that the grinding medium passes out of the grinding cylinder 4 along the discharge pipe 8, and then new grinding medium is supplemented to the feeding pipe 31, so as to realize the replacement of the grinding medium size and adjust the grinding fineness.

[0067] In addition, the casting sand sent out from the discharge pipe 8 contains part of the ground fine powder, which can be separated from the finished casting sand and the ground fine powder by using the cyclone separation principle through the machine-made sand powder separator as a subsequent processing equipment to meet the production requirements of the casting sand. Moreover, in the traditional grinding process of the casting sand, the commonly used method is to adjust the distance between the upper and lower pressing plates, and the upper and lower pressing plates are supported and adjusted through a complex driving arm structure, which not only reduces the grinding efficiency, but also causes damage to the driving arm due to the strong reaction force of the casting sand acting on the upper and lower pressing plates during the grinding process, thereby increasing the use cost of the equipment. The application adopts the grinding method of putting the grinding medium, and the grinding medium and the grinding seat 5 cooperate to grind the ground casting sand during the circulation and stirring process, which not only effectively reduces the grinding processing cost and improves the economic benefit, but also designs the separation pipe 9 with switchable communication state, and selects the working mode of replacing the grinding medium or repeatedly grinding the substandard casting sand, so as to provide the function of flexibly adjusting the grinding fineness on the basis of meeting the grinding quality of the casting sand, and realize the improvement of the use effect of the whole grinding device.

[0068] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0069] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A casting sand grinding device capable of adjusting the fineness, characterized by, The utility model relates to a kind of grinding machine, including: First connecting plate (2) and second connecting plate (3) are relatively fixed on the top surface of base (1); Grinding cylinder (4) is connected between the first connecting plate (2) and the second connecting plate (3), the first connecting plate (2) is provided with feeding port, the feeding port is communicated with the inner chamber of the grinding cylinder (4), the base (1) is provided with driving element connected with the grinding cylinder (4), the cross section of the inner chamber of the grinding cylinder (4) is regular hexagon; Grinding seat (5) is fixed in the grinding cylinder (4), and the bottom end is matched with the inner chamber of the grinding cylinder (4) to form grinding surface; Screening seat (6) is fixed on the top end of the grinding seat (5), the screening seat (6) is provided with screen (7), the bottom surface of the screen (7) is communicated with the inner chamber of the grinding seat (5), the inner chamber of the grinding seat (5) is communicated with discharge pipe (8) on one side, one end of the discharge pipe (8) is stretched out of the second connecting plate (3), the top surface of the screen (7) is communicated with separation pipe (9) on one side, the separation pipe (9) is provided with movable switch, when the movable switch is opened, the separation pipe (9) is communicated with the inner chamber of the grinding cylinder (4), when the movable switch is closed, the separation pipe (9) is communicated with the outside of the grinding cylinder (4); The side of the screening seat (6) is provided with separation port, the top surface of the screen (7) extends obliquely downward towards the separation port, the separation pipe (9) extends obliquely downward out of the first connecting plate (2) in the direction away from the screening seat (6), the top end of the separation pipe (9) is fixed with first cover plate (10), the movable switch includes baffle (15) sliding in the separation pipe (9), the baffle (15) and the first cover plate (10) have switchable fixed or movable state; The bottom end of the separation pipe (9) is provided with through slot (11), the through slot (11) is arranged directly below the first cover plate (10), the through slot (11) is slidingly connected with movable plate (12), the top end of the movable plate (12) extends to the side wall of the separation pipe (9) and is fixed with transmission rod (13), the side wall of the separation pipe (9) is provided with sliding slot, the transmission rod (13) is slidingly connected in the sliding slot, one end of the transmission rod (13) extends into the separation pipe (9), the baffle (15) and the transmission rod (13) are fixed with pull rod (14), the first cover plate (10) is provided with positioning pin (16) in vertical direction, when the baffle (15) is fixed with the positioning pin (16), the through slot (11) penetrates in vertical direction, when the baffle (15) is movable relative to the positioning pin (16), the movable plate (12) blocks the through slot (11).

2. The grit size adjustable casting sand grinding device according to claim 1, characterized in that: The inner chamber of the grinding seat (5) is fixed with guide plate (17), one side of the grinding seat (5) is provided with discharge port, the top surface of the guide plate (17) extends obliquely downward towards the discharge port, the discharge port is communicated and fixed with the discharge pipe (8), the discharge pipe (8) is obliquely downward distributed in the direction away from the grinding seat (5).

3. The grit size adjustable casting sand grinding device according to claim 2, characterized in that: The inner cavity bottom end of the grinding seat (5) is fixedly connected with a counterweight (19), and the bottom surface of the guide plate (17) is fixedly connected with a vibration motor (20).

4. The grit size adjustable casting sand grinding device according to claim 1, wherein, The driving member comprises: A driving motor (21) is fixedly connected to the top surface of the base (1), and the output shaft of the driving motor (21) is connected with a belt pulley (24) through a shaft coupling (22); A transmission belt (23) is sleeved on the belt pulley (24) and the outer ring side of the grinding cylinder (4).

5. The grit size adjustable foundry sand grinding device of claim 1, wherein: The bottom surface of the grinding seat (5) is circular arc-shaped, and a plurality of grinding protrusions (25) are fixedly connected to the bottom surface of the grinding seat (5) in an array, and the grinding protrusions (25) are not in contact with the inner wall surface of the grinding cylinder (4).

6. The grit size adjustable foundry sand grinding device of claim 1, wherein: A first support rod (26) is fixedly connected to one side of the grinding seat (5) close to the separation pipe (9), the first support rod (26) extends out of the first connecting plate (2) and is fixedly connected with a first fixing rod (27), the bottom end of the first fixing rod (27) is fixedly connected with the base (1), a second support rod (28) is fixedly connected to one side of the screening seat (6) close to the discharge pipe (8), the second support rod (28) extends out of the second connecting plate (3) and is fixedly connected with a second fixing rod (29), and the bottom end of the second fixing rod (29) is fixedly connected with the base (1).

7. The grit size adjustable casting sand grinding device according to claim 1, wherein: Both ends of the grinding cylinder (4) are open ends, the inner ring side of both ends of the grinding cylinder (4) is connected with the first connecting plate (2) and the second connecting plate (3) through sealing bearings (30) respectively, and the inner ring side diameter of the sealing bearing (30) is smaller than the inner cavity diameter of the grinding cylinder (4).

8. The grit size adjustable casting sand grinding device according to claim 7, characterized in that: A feeding pipe (31) is fixedly connected in the feeding port, and the projection of the feeding port in the horizontal direction is located in the inner ring side of the sealing bearing (30).

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