A resin sand mixer for casting

Abstract

The invention discloses a resin sand mixer for casting, which relates to the technical field of resin sand mixers and comprises a base, a conveying drum, a stirring drum, a controller, a screening component and a stirring component, and is characterized in that: the conveying drum is arranged above the base, the stirring drum is arranged below the conveying drum, the two are communicated, a discharge port is arranged at the left bottom of the stirring drum, a connecting plate is fixed on the outer side of the discharge port; the screening component is arranged below the connecting plate and is used for screening resin sand that has not been stirred well; the stirring component is arranged inside the screening component and is used for crushing the resin sand; the screening component comprises a cover shell, the cover shell is fixed to the bottom of the connecting plate, an electric telescopic rod is fixed on the upper part of the cover shell, the electric telescopic rod is arranged in four groups, filter plates are fixed at the bottom of the four groups of electric telescopic rods, and a plurality of long grooves are opened in the middle of the filter plate. The invention can effectively improve the production efficiency function.

Description

Technical Field

[0001] The invention is applied to the technical field of resin sand mixers and is named as a resin sand mixer for casting. Background Art

[0002] Resin sand mixer is a continuously operating sand mixing machine used for mixing resin molding sand and core sand in foundries. This machine is a resin self-hardening sand mixer that continuously mixes liquid curing agent and liquid resin for molding or core making. Resin sand mixer generally refers to a double-arm resin sand mixer, which is characterized by being composed of two-stage freely rotating stirring cage. The first stage is a conveying stirring cage for conveying raw sand; the second stage is a high-speed sand mixing stirring cage, which mixes sand at high speed and circulates the mixed resin sand into the mold to make it naturally formed.

[0003] However, during use, it is often found that the resin sand is not mixed evenly and will condense into lumps. When it falls into the mold, the appearance and quality of the produced product are difficult to meet the standards. Therefore, it is necessary to provide a resin sand mixer for casting, which can screen out the resin sand that is not mixed well when the resin sand falls into the mold, thereby improving the production quality. Summary of the invention

[0004] The object of the present invention is to provide a resin sand mixer for casting to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a resin sand mixer for casting, comprising a base, a conveying drum, a stirring drum, a controller, a screening assembly, and a stirring assembly, characterized in that: the conveying drum is arranged above the base, the stirring drum is arranged below the conveying drum, and the two are connected, a discharge port is arranged at the left bottom of the stirring drum, and a connecting plate is fixed to the outer side of the discharge port;

[0006] The screening component is arranged below the connecting plate and is used to screen the resin sand that has not been stirred well;

[0007] The stirring component is arranged inside the screening component and is used for crushing the resin sand;

[0008] The screening assembly includes a cover shell, which is fixed to the bottom of a connecting plate. An electric telescopic rod is fixed to the upper part of the interior of the cover shell. Four groups of electric telescopic rods are provided. Filter plates are fixed to the bottom of the four groups of electric telescopic rods. A plurality of long grooves are provided in the middle of the filter plates. The filter plates are slidably connected to the inner wall of the cover shell.

[0009] In one embodiment, a camera is fixed to the bottom of the inner wall of the cover shell for photographing the resin sand falling from the filter plate, and the camera and the electric telescopic rod are electrically connected to the controller.

[0010] In one embodiment, the stirring assembly includes a second drive, threaded rod, wherein:

[0011] The second drive is fixed to one side of the cover shell, the threaded rod is arranged inside the cover shell and connected to the front and rear sides of the cover shell by bearings, the output end of the second drive is fixed to the threaded rod, a slider is threadedly connected to the surface of the threaded rod, a pressure shaft is connected to the right bearing of the slider, and a plurality of protrusions are fixed to the surface of the pressure shaft.

[0012] In one embodiment, a slide groove is opened on the right side of the inner wall of the cover shell, a rack is fixed on the surface of the slide groove, one end of the pressure shaft is arranged inside the slide groove, a gear is fixed on the right end of the pressure shaft, and the gear and the rack are meshed with each other.

[0013] In one embodiment, a transmission pipe is connected to one side of the cover shell and one side of the mixing drum, the interface between the transmission pipe and the cover shell is located above the filter plate, and a first pump body is connected in the middle of the transmission pipe. The first pump body can pump the resin sand on the filter plate into the mixing drum for secondary mixing.

[0014] In one embodiment, an air duct is connected to the left side of the cover shell, a second pump body is connected to the middle of the air duct, and the air duct is arranged above the filter plate to facilitate blowing air above the filter plate.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention, by providing a screening component, can screen out the resin sand that has coagulated into blocks, and recycle the screened resin sand into the mixing drum for secondary utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0017] In the attached picture:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the overall structure of the present invention;

[0020] Figure 3 It is a partial enlarged schematic diagram of the A area of ​​the present invention;

[0021] Figure 4 is a two-dimensional schematic diagram of a gear rack of the present invention;

[0022] In the figure: 1. base; 2. feed port; 3. first drive; 4. conveying drum; 5. mixing drum; 6. transmission pipe; 7. first pump body; 8. connecting plate; 9. cover; 10. rotating rod; 11. stirring plate; 12. air duct; 13. second pump body; 14. second drive; 15. electric telescopic rod; 16. pressure roller; 17. slider; 18. threaded rod; 19. slide groove; 20. filter plate; 21. long groove; 22. rack; 23. gear; 24. camera. DETAILED DESCRIPTION

[0023] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0024] See also Figure 1 As shown, the present invention provides a technical solution: a resin sand mixer for casting, comprising a base 1, a conveying drum 4, a mixing drum 5 and a controller, the conveying drum 4 is arranged above the base 1, and the mixing drum 5 is arranged below the conveying drum 4, the two are connected, a feed port 2 is opened on the top of the conveying drum 4, it is convenient to let the resin sand enter the conveying drum 4 from the feed port, and the resin sand is pushed into the mixing drum 5 through the existing drive in the sand mixer, a discharge port is arranged on the left bottom of the mixing drum 5, a connecting plate 8 is fixed on the outside of the discharge port, and the controller is arranged on one side of the resin sand mixer.

[0025] like Figure 2 As shown, a rotating rod 10 is provided inside the mixing drum 5, and a first drive 3 is fixed to the right side of the mixing drum 5. The output end of the first drive 3 is fixed to the rotating rod 10, so as to drive the rotating rod 10 to rotate and provide power for it. A plurality of stirring plates 11 are fixed on the surface of the rotating rod 10. A thin tube is provided on the outside of one side of the mixing drum 5, so as to transmit the liquid curing agent from the outside to the inside of the mixing drum 5. The stirring plate 11 follows the rotation of the rotating rod 10 to stir the liquid curing agent and the raw materials of the resin sand to mix the two. The stirring plate 11 is in an inclined state, and the angle between the stirring plate 11 and the axis of the rotating rod 10 is forty-five degrees, so that when the resin sand is stirred, the resin sand can be pushed to the discharge port to facilitate the outflow of the stirred resin sand.

[0026] like Figure 2 and Figure 3As shown, a screening component is provided below the connecting plate 8 for screening the resin sand that has not been stirred well. The screening component includes a cover shell 9, which is fixed to the bottom of the connecting plate 8. An electric telescopic rod 15 is fixed to the upper part of the inside of the cover shell 9. Four groups of electric telescopic rods 15 are provided. Filter plates 20 are fixed to the bottom of the four groups of electric telescopic rods 15. A plurality of long grooves 21 are provided in the middle of the filter plate 20 to facilitate the resin sand to fall into the mold through the long grooves 21. The filter plate 20 is slidably connected to the inner wall of the cover shell 9 to facilitate the filter plate 20 to move up and down inside the cover shell 9.

[0027] A camera 24 is fixed to the bottom of the inner wall of the housing 9 for photographing the resin sand falling from the filter plate 20. The camera 24 and the electric telescopic rod 15 are electrically connected to the controller.

[0028] like Figure 2 As shown, a transmission pipe 6 is connected to one side of the cover 9 and one side of the mixing drum 5, and the interface between the transmission pipe 6 and the cover 9 is located above the filter plate 20. A first pump body 7 is connected in the middle of the transmission pipe 6. The first pump body 7 can pump the resin sand on the filter plate 20 into the mixing drum 5 for secondary mixing;

[0029] like Figure 3 As shown, a stirring assembly is provided inside the housing 9 for crushing the resin on the filter plate 20, and the stirring assembly includes a second drive 14 and a threaded rod 18. The second drive 14 is fixed to one side of the housing 9, and the threaded rod 18 is provided inside the housing 9 and connected to the front and rear sides of the housing 9 by bearings. The output end of the second drive 14 is fixed to the threaded rod 18, and a slider 17 is threadedly connected to the surface of the threaded rod 18. When the second drive 14 is started, the threaded rod 18 is driven to rotate, and then the slider 17 is driven to move forward and backward on the threaded rod 18. The right bearing of the slider 17 is connected to a pressing shaft 16, and a plurality of protrusions are fixed on the surface of the pressing shaft 16.

[0030] like Figure 3 and Figure 4 As shown, a slide groove 19 is provided on the right side of the inner wall of the housing 9, a rack 22 is fixed on the surface of the slide groove 19, one end of the pressing shaft 16 is arranged inside the slide groove 19, a gear 23 is fixed on the right end of the pressing shaft 16, and the gear 23 and the rack 22 are meshed with each other;

[0031] like Figure 3 As shown, the left side of the cover shell 9 is connected with an air duct 12 , and the middle of the air duct 12 is connected with a second pump body 13 . The air duct 12 is arranged above the filter plate 20 to facilitate blowing air above the filter plate 20 .

[0032] Embodiment 1

[0033] In this embodiment, the first drive 3 may be a motor;

[0034] The first pump body 7 may be an air pump

[0035] When the resin sand mixer is started, the controller controls the electric telescopic rod 15 to extend and retract, driving the filter plate 20 to slide up and down inside the housing 9, wherein the distance of the electric telescopic rod 15 to extend and retract is within a small range, the purpose is to make the filter plate 20 shake, so that the resin sand can fall from the long groove 21 onto the mold;

[0036] The electric telescopic rod 15 is initially in an extended state, so that the filter plate 20 is away from the connection between the transmission pipe 6 and the housing 9, to prevent the resin sand from entering the transmission pipe 6 when it shakes;

[0037] Specifically, when the resin sand enters the mixing drum 5, the first drive 3 is started to mix the resin sand and the liquid coagulant, and the resin sand is pushed toward the discharge port through the stirring plate 11, and flows out from the discharge port;

[0038] The resin sand falls into the housing 9 and falls onto the top of the filter plate 20. Since the filter plate 20 shakes up and down through the electric telescopic rod 15, the evenly stirred resin sand flows out from the inside of the long groove 21, while the resin sand that is not evenly stirred and condensed into blocks stays on the top of the filter plate 20. By this means, the condensed resin sand is filtered out, thereby improving the quality of mold forming;

[0039] At the same time, the camera 24 is used to detect the resin sand falling from the filter plate 20 in real time. When the camera 24 does not detect the resin sand falling, it means that the long groove 21 on the filter plate 20 is blocked. At this time, the controller automatically controls the resin sand mixer to stop running, and controls the electric telescopic rod 15 to contract through the controller to drive the filter plate 20 to move upward, so that the filter plate 20 stays at the connection between the transmission pipe 6 and the cover 9. At this time, the controller transmits a signal to the first pump body 7 to start the first pump body 7, and the resin sand accumulated on the filter plate 20 is sucked into the mixing drum 5 for secondary mixing, thereby improving the utilization rate of the resin sand and preventing the top of the filter plate 20 from being blocked;

[0040] Embodiment 2

[0041] In this embodiment, the second pump body 13 may be an air pump;

[0042] The second drive 14 may be a motor;

[0043] Specifically, based on the first embodiment, after the resin sand condensed into blocks above the filter plate 20 is absorbed, the controller controls the electric telescopic rod 15 to extend again to restore it to its original position and continue the unloading work. If the camera 24 detects that resin sand falls during unloading, it means that the filter plate 20 is no longer blocked and the unloading work continues;

[0044] If the camera 24 does not detect the resin sand falling or only a small amount of resin sand falling during feeding, it means that the resin sand that has solidified into a lump is stuck in the long groove 21, and other resin sand that has been evenly stirred cannot fall through the long groove 21;

[0045] At this time, the controller controls the electric telescopic rod 15 to retract, driving the filter plate 20 to move to the bottom of the stirring assembly, and the controller starts the second drive 14 to rotate, driving the threaded rod 18 to rotate, thereby driving the slider 17 to move on the threaded rod 18. When the slider 17 moves to the other end of the threaded rod 18, the controller controls the second drive 14 to rotate in the opposite direction, thereby driving the slider 17 to move back and forth on the threaded rod 18. When the slider 17 moves, it drives the pressure shaft 16 on one side to move. Since the filter plate 20 is below the pressure shaft 16, when the pressure shaft 16 moves, the gear 2 on the other side 3 will cooperate with the rack 22, thereby driving the pressing shaft 16 to rotate. Through the above steps, the pressing shaft 16 can be moved and rotated, so that the protrusions on the pressing shaft 16 can crush the condensed resin sand stuck in the long groove 21, and at the same time, the controller controls the second pump body 13 to start, pumping external gas into the filter plate 20. When the protrusions crush the resin sand, the gas is blown to the surface of the filter plate 20, so that the crushed resin sand falls from the long groove 21 more quickly, and the internal resin sand adhering to the long groove 21 can be blown away by the airflow, thereby increasing the service life of the filter plate 20;

[0046] At the same time, the resin sand in the chute 19 can be blown away to prevent the resin sand in the chute 19 from accumulating and affecting the coordination between the gear 23 and the rack 22 .

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, internal communication between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The above is a detailed introduction to a resin sand mixer for casting provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A resin sand mixer for casting, comprising a base (1), a conveying drum (4), a stirring drum (5), a controller, a screening component, and a stirring component, characterized in that: The conveying cylinder (4) is arranged above the base (1), and the mixing cylinder (5) is arranged below the conveying cylinder (4), and the two are connected. A discharge port is arranged at the bottom left of the mixing cylinder (5), and a connecting plate (8) is fixed to the outside of the discharge port. The screening component is arranged below the connecting plate (8) and is used to screen the resin sand that has not been stirred well; The stirring component is arranged inside the screening component and is used for crushing the resin sand; The screening assembly comprises a cover shell (9), the cover shell (9) being fixed to the bottom of the connecting plate (8), an electric telescopic rod (15) being fixed to the upper part of the inside of the cover shell (9), the electric telescopic rod (15) being provided in four groups, a filter plate (20) being fixed to the bottom of the four groups of the electric telescopic rod (15), a plurality of long grooves (21) being provided in the middle of the filter plate (20), and the filter plate (20) being slidably connected to the inner wall of the cover shell (9); A camera (24) is fixed to the bottom of the inner wall of the cover shell (9) for photographing the resin sand falling from the filter plate (20); the camera (24) and the electric telescopic rod (15) are electrically connected to the controller; The stirring assembly comprises a second drive (14) and a threaded rod (18), wherein: The second drive (14) is fixed to one side of the housing (9), the threaded rod (18) is arranged inside the housing (9) and connected to the front and rear sides of the housing (9) by bearings, the output end of the second drive (14) is fixed to the threaded rod (18), the surface of the threaded rod (18) is threadedly connected to a slider (17), the right side bearing of the slider (17) is connected to a pressure shaft (16), and a plurality of protrusions are fixed to the surface of the pressure shaft (16); A slide groove (19) is provided on the right side of the inner wall of the cover shell (9), a rack (22) is fixed on the surface of the slide groove (19), one end of the pressing shaft (16) is arranged inside the slide groove (19), a gear (23) is fixed on the right end of the pressing shaft (16), and the gear (23) and the rack (22) are meshed with each other; A transmission pipe (6) is connected to one side of the cover shell (9) and one side of the mixing drum (5); an interface between the transmission pipe (6) and the cover shell (9) is located above the filter plate (20); a first pump body (7) is connected in the middle of the transmission pipe (6); the first pump body (7) can pump the resin sand on the filter plate (20) into the mixing drum (5) for secondary mixing; The left side of the housing (9) is connected to an air duct (12), the middle of the air duct (12) is connected to a second pump body (13), and the air duct (12) is arranged above the filter plate (20) to facilitate blowing air above the filter plate (20); A feed inlet (2) is provided at the top of the conveying cylinder (4); A rotating rod (10) is arranged inside the mixing drum (5), a first drive (3) is fixed to the right side of the mixing drum (5), an output end of the first drive (3) is fixed to the rotating rod (10), and a plurality of stirring plates (11) are fixed to the surface of the rotating rod (10); The stirring plate (11) is in an inclined state; The method of using the screening component and the stirring component is as follows: Step 1: The resin sand falls into the housing (9) and falls onto the top of the filter plate (20). As the filter plate (20) shakes up and down via the electric telescopic rod (15), the evenly stirred resin sand flows out from the inside of the long groove (21), while the resin sand that is not evenly stirred and agglomerated into blocks remains on the top of the filter plate (20); Step 2: The resin sand falling from the filter plate (20) is detected in real time by the camera (24). When the camera (24) does not detect the resin sand falling, it indicates that the long groove (21) on the filter plate (20) is blocked. At this time, the controller automatically controls the resin sand mixer to stop running, and controls the electric telescopic rod (15) to contract through the controller, so as to drive the filter plate (20) to move upward, so that the filter plate (20) stays at the connection between the transmission pipe (6) and the cover shell (9). At this time, the controller transmits a signal to the first pump body (7), so that the first pump body (7) starts and sucks the resin sand accumulated on the filter plate (20) into the mixing drum (5); Step 3: After the resin sand that has condensed into blocks on the filter plate (20) is completely absorbed, the controller controls the electric telescopic rod (15) to extend again to restore it to its original position and continue the unloading operation. If the camera (24) does not detect the resin sand falling or a small amount of resin sand falling during unloading, it means that the resin sand that has condensed into blocks is stuck in the long groove (21), and other resin sand that has been evenly stirred cannot fall through the long groove (21). It is necessary to stir the resin sand through the stirring component so that it no longer blocks the long groove (21); At this time, the controller controls the electric telescopic rod (15) to retract, driving the filter plate (20) to move to the bottom of the stirring assembly. The controller starts the second drive (14) to rotate, driving the threaded rod (18) to rotate, thereby driving the slider (17) to move on the threaded rod (18). When the slider (17) moves to the other end of the threaded rod (18), the controller controls the second drive (14) to rotate in the opposite direction, thereby driving the slider (17) to move back and forth on the threaded rod (18). When the slider (17) moves, it drives the pressure shaft (16) on one side to move. Since the filter plate (20) is below the pressure shaft (16), when the pressure shaft (16) moves When the pressure shaft (16) is moved, the gear (23) on the other side cooperates with the rack (22), thereby driving the pressure shaft (16) to rotate. Through the above steps, the pressure shaft (16) moves and rotates, so that the protrusion on the pressure shaft (16) crushes the resin sand that has condensed into blocks and is stuck in the long groove (21). At the same time, the controller controls the second pump body (13) to start, and pumps external gas into the filter plate (20). When the protrusion crushes the resin sand, the gas is blown onto the surface of the filter plate (20), so that the crushed resin sand falls from the long groove (21). At the same time, the resin sand adhering to the inside of the long groove (21) is blown away by the airflow, thereby increasing the service life of the filter plate (20); At the same time, the resin sand in the chute (19) is blown away to prevent the resin sand in the chute (19) from accumulating and affecting the coordination between the gear (23) and the rack (22).

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