Phenolic urea resin and precious sand mixed sand casting device and production process

Abstract

The application provides a casting device and production process using phenolic urea alkane resin and mixed sand of bead sand, and belongs to the technical field of casting equipment. The device comprises a feeding inlet, the outer surface of the bottom end of the feeding inlet is fixedly connected with a stirring cavity, the outer side of the bottom end of the stirring cavity is fixedly connected with a fixed plate, and the outer surface of the bottom end of the fixed plate is fixedly connected with a supporting leg. When the device works, the mixed raw materials are in the stirring cavity, the driving gear starts to rotate by starting the device, the driving gear rotates to drive the driven gear engaged with the outside to start to rotate, the driven gear drives the stirring mechanism at the bottom to rotate, the surface of the stirring mechanism with a threaded shape has more contact area, thereby increasing the stirring effect and enabling various sand particles to be more uniformly mixed, meanwhile, the threaded rod can generate greater tangential force in the stirring process, improving the fluidity of the mixture, and the connecting plate fixes the placing rack on the inner wall of the stirring cavity, enabling the stirring mechanism to stably operate.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, specifically to a sand casting apparatus and production process using a mixture of phenol-urea resin and granulated sand. Background Technology

[0002] In the modern foundry industry, researchers are constantly exploring new casting processes and materials to improve casting quality and reduce production costs. Traditional casting processes often use single types of sand, but these sands suffer from uneven particle distribution and poor thermal stability during the casting process. To overcome these shortcomings, researchers have turned their attention to the mixed sand casting process of phenol-urea resin and granulated sand. Phenolic-urea resin has good bonding properties, which can effectively improve the molding effect of mixed sand and reduce the scrap rate. Granulated sand has high thermal stability and corrosion resistance, which significantly improves the surface finish of castings. By using mixed sand of phenol-urea resin and granulated sand, the two materials can be mixed in a certain proportion to improve the dimensional accuracy and strength of castings and meet the needs of high-end casting.

[0003] During the mixing process, the high-speed rotation of the agitator causes strong adsorption between the particles in the mixture and the surface of the agitator, resulting in the mixture adhering to the outside of the agitator. As the mixing process continues, a relatively thick adhesion layer is formed. When the adhesion layer reaches a certain thickness, it will reduce the mixing effect. At the same time, the presence of the adhesion layer will also increase the frictional resistance of the agitator, making the device operation less smooth or even causing malfunctions. To address the above problems, a mixed sand casting device and production process using phenol-urea resin and granulated sand is proposed. Summary of the Invention

[0004] This invention provides a mixed sand casting device and production process using phenol-urea resin and abrasive sand, aiming to solve the problem in the prior art where, during the mixing process, the high-speed rotation of the agitator causes strong adsorption between the particles in the mixture and the surface of the agitator, resulting in the mixture adhering to the outside of the agitator. As the mixing process continues, a thick adhesion layer is formed, which reduces the mixing effect when the adhesion layer reaches a certain thickness.

[0005] The present invention is implemented as follows: It includes an inlet, a stirring chamber fixedly connected to the bottom outer surface of the inlet, a fixing plate fixedly connected to the bottom outer side of the stirring chamber, a support foot fixedly connected to the bottom outer surface of the fixing plate, a mold-flipping cavity provided on one side of the support foot, a driving mechanism provided inside the stirring chamber, a connecting column movably connected to the bottom outer surface of the driving mechanism, a limiting plate movably connected to the outside of the connecting column, a driving gear fixedly connected to the bottom outer surface of the limiting plate, a placement frame provided at the bottom of the driving gear, a connecting plate fixedly connected to the outer surface of the placement frame, a driven gear movably connected to the top outer surface of the placement frame, and a stirring mechanism fixedly connected to the bottom of the driven gear.

[0006] Preferably, a linkage mechanism is movably connected to the bottom outer surface of the placement rack, a connecting rod is fixedly connected to the bottom outer surface of the linkage mechanism, a placement ring is fixedly connected to the outside of the connecting rod, two sets of connecting platforms are fixedly connected to the outer surface of the placement ring, a rotating shaft is movably connected to the inner surface of the connecting platform, a first connecting strip is fixedly connected to the outer surface of the rotating shaft, second connecting strips are provided on both sides of the first connecting strip, a cleaning end is fixedly connected to one side of the outer surface of the second connecting strip, and two sets of first slots are opened on the outer surface of the linkage mechanism.

[0007] Preferably, the top outer surface of the linkage mechanism is provided with a movable groove, the outer surface of the movable groove is movably connected to a linkage rod, the outer surface of the linkage rod is provided with two sets of second grooves, the bottom inner surface of the linkage rod is movably connected to a rotating ring, and the inner surface of the rotating ring is fixedly connected to a connecting disc.

[0008] Preferably, a filter disc is fixedly connected to the inner surface of the stirring chamber, a movable shaft is fixedly connected to the bottom inner surface of the filter disc, a crushing rod is movably connected to the outer surface of the movable shaft, a processing chamber is provided at the bottom of the filter disc, locking blocks are movably connected to the outer surfaces of both sides of the processing chamber, a guide ring is fixedly connected to the inner surface of the processing chamber, a push rod is movably connected to the bottom outer surface of the guide ring, and a material discharge platform is provided at the bottom of the push rod.

[0009] Preferably, the mold-flipping cavity is fixedly connected to the bottom end of the mixing chamber, the connecting column passes through the limiting plate and is fixedly connected to the placement frame, the outer surface of the driving gear is tightly fitted with the driven gear, the driving gear and the driven gear are meshed, the number of driven gears is set to three, the driven gear passes through the placement frame and is fixedly connected to the mixing mechanism, and the outer surface of the connecting plate is fixedly connected to the inner surface of the mixing chamber.

[0010] Preferably, the placement rings are evenly distributed along the vertical direction of the connecting rod, the placement rings are set as a group, the connecting platform is set as an upper and lower semi-circular group, the connecting platform is distributed in a ring about the outer surface of the placement ring, the connecting platform is set in two groups, and the rotating shaft is rotatably connected to the connecting platform.

[0011] Preferably, the second connecting strip is symmetrically distributed on both outer surfaces of the first connecting strip. The second connecting strip is fixed between the rotating shaft and the cleaning end. Both the first and second connecting strips are made of soft, elastic material. The cleaning end forms a rotating structure with the linkage mechanism through the cooperation between the first connecting strip and the rotating shaft. The first slot is opened on the outer surface of the linkage mechanism. The linkage mechanism is rotatably connected to the placement frame.

[0012] Preferably, the connecting rod and the movable slot are rotatably connected, the connecting rod is movably connected to the linkage mechanism through the movable slot, the second slot is circumferentially opened about the outer surface of the connecting rod, and two sets of the second slot are opened, the connecting plate is fixedly connected to the bottom of the linkage mechanism, and the rotating ring is movably connected to the second slot.

[0013] Preferably, the filter disc is inverted conical in shape, and several small holes are formed through the inner and outer surfaces of the filter disc. The movable shaft and the crushing rod are rotatably connected. The outer surface of the bottom end of the crushing rod is tightly fitted with the inner surface of the filter disc. The processing cavity is fixed inside the mold cavity. The processing cavity is detachable by means of a locking block. The guide ring is hollow. The push rods are symmetrically distributed on both sides of the bottom of the guide ring. The material discharge table is fixed to the bottom of the mold cavity.

[0014] The production process using a mixed sand casting apparatus employing phenol-urea resin and abrasive sand includes the following steps: S1. When the device is working, the operator pours the mixture of phenol urea resin and granulated sand into the device through the feed port. When the mixture is inside the mixing chamber, the drive gear rotates, thereby driving the driven gear and the mixing mechanism of the external meshing transmission to rotate. S2. The surface of the stirring mechanism with its threaded shape has a larger contact area and more contact points with the mixing sand, thereby increasing the stirring effect and improving the fluidity of the mixture. S3. After the mixing mechanism has finished mixing the raw materials, the first connecting bar rotates to the open state through the rotating shaft. When the linkage mechanism rotates, it drives the bottom connecting rod and the second slot to rotate together. When the connecting rod rotates, it drives the outer cleaning end to rotate as well. S4. The cleaning end cleans the surface of the mixing mechanism when it rotates, causing the sand particles attached to the outside of the mixing mechanism to fall off, so as to maintain the smooth operation of the mixing mechanism, improve production efficiency, and prevent clogging problems. S5. After the cleaning work at the cleaning end is completed, the rotating shaft controls the first connecting bar to rotate downward, so that the cleaning end is drawn into the linkage mechanism from the first slot. Then, the external linkage rod is rotated so that the second slot is staggered with the first slot, covering the outside of the linkage mechanism. The device protects the internal parts of the linkage mechanism when cleaning is not required. S6. The well-stirred mixed sand falls onto the top of the filter plate and leaks into the bottom through the small hole at the inner end of the filter plate. The crushing rod rotates against the inner wall of the filter plate to crush the clumps of raw material, so that all the raw material can leak out to the bottom of the device. S7. The processed raw materials are processed inside the processing cavity, where artificial molding is performed. The clamping block allows the processing cavity to be disassembled, making it easy for workers to flip the mold and remove the mold. The push rod makes it easy to demold the raw materials, thereby producing the sand core for casting.

[0015] The present invention provides a casting apparatus and production process for a mixed sand casting device using phenol-urea resin and abrasive sand. When the device is in operation, the operator pours the mixed raw material of phenol-urea resin and abrasive sand into the device through the feed port. When the mixed raw material is inside the mixing chamber, the device is started to make the drive gear start to rotate. The rotation of the drive gear drives the driven gear of the external meshing transmission to start to rotate. The driven gear drives the bottom stirring mechanism to rotate. The surface of the stirring mechanism with a threaded shape has more contact area and more contact points with the mixed sand, thereby increasing the stirring effect and better pushing the sand particles from the center to the edge, so that the various sand particles can be mixed more evenly. At the same time, the threaded rod can generate a larger tangential force during the stirring process, making it easier for the sand particles to move along the threaded rod and improving the fluidity of the mixture. The connecting plate fixes the placement frame to the inner wall of the mixing chamber, so that the stirring mechanism can operate stably. The present invention provides a mixed sand casting device and production process using phenol-urea resin and abrasive sand. After the mixing mechanism has mixed the raw materials, the first connecting bar is rotated to an open state via a rotating shaft. The linkage mechanism and the placement frame are rotatably connected. When the linkage mechanism rotates, it drives the bottom connecting rod and the second slot to rotate together. When the connecting rod rotates, it drives the second connecting bar and the first connecting bar to rotate together. At the same time, the external cleaning end rotates. When the cleaning end rotates, it cleans the surface of the mixing mechanism, causing the sand particles attached to the outside of the mixing mechanism to fall off, so as to maintain the smooth operation of the mixing mechanism, improve production efficiency, and prevent clogging. After the cleaning end has finished cleaning, the rotating shaft controls the first connecting bar to rotate downward, so that the cleaning end is retracted into the linkage mechanism from the first slot. Then, the external linkage rod is rotated so that the second slot and the first slot are staggered, covering the outside of the linkage mechanism. The device protects the internal parts of the linkage mechanism when cleaning is not required, so that the cleaning end can be retracted into the linkage mechanism. This invention provides a casting apparatus and production process for a mixed sand of phenolic urea resin and abrasive sand. The uniformly stirred mixed sand falls onto the top of the filter plate and leaks into the bottom through a small hole at the inner end of the filter plate. The crushing rod rotates against the inner wall of the filter plate to crush the lumpy raw material, allowing all the raw material to leak to the bottom of the device, while avoiding clogging of the filter plate and ensuring normal operation of the device. The processed raw material is then processed inside the processing chamber, where artificial molding is performed. The clamping block allows the processing chamber to be disassembled, facilitating the workers to flip the mold. After the mixed sand is dried and drained, the strength of the sand core material is increased. The push rod facilitates the demolding of the raw material, thereby producing a sand core for casting. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the mixed sand casting device using phenol-urea resin and abrasive sand provided by the present invention. Figure 2 This is a schematic diagram of the stirring mechanism in the mixed sand casting device using phenol-urea resin and granulated sand provided by the present invention. Figure 3 This is a schematic diagram of the drive gear structure in the mixed sand casting device using phenol-urea resin and abrasive sand provided by the present invention. Figure 4 This is a schematic diagram of the cleaning end structure in the mixed sand casting device using phenol-urea resin and abrasive sand provided by the present invention. Figure 5 This is the present invention. Figure 4 Schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the filter disc structure in the mixed sand casting device using phenol-urea resin and abrasive sand provided by the present invention. Figure 7 This is a schematic diagram of the processing cavity structure in the mixed sand casting device using phenol-urea resin and granulated sand provided by the present invention.

[0018] Summary of reference numerals in the attached drawings: 1. Inlet; 101. Mixing chamber; 102. Fixing plate; 103. Support leg; 104. Flipping mold cavity; 2. Drive mechanism; 201. Connecting column; 202. Limiting plate; 203. Drive gear; 204. Placement frame; 205. Connecting plate; 206. Driven gear; 207. Mixing mechanism; 3. Linkage mechanism; 301. Connecting rod; 302. Placement ring; 303. Connecting platform; 304. Rotating shaft; 305. First connecting bar; 306. Second connecting bar; 307. Cleaning end; 308. First slot; 4. Movable slot; 401. Connecting rod; 402. Second slot; 403. Rotating ring; 404. Connecting disc; 5. Filter disc; 501. Movable shaft; 502. Crushing rod; 6. Processing chamber; 601. Clamping block; 602. Guide ring; 603. Push rod; 604. Discharge table. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Example 1, please refer to Figure 1 , Figure 2 and Figure 3 .

[0024] This embodiment provides a casting apparatus and production process for a mixed sand casting device using phenol-urea resin and abrasive sand. The apparatus includes an inlet 1, a mixing chamber 101 fixedly connected to the bottom outer surface of the inlet 1, a fixing plate 102 fixedly connected to the bottom outer side of the mixing chamber 101, a support foot 103 fixedly connected to the bottom outer surface of the fixing plate 102, a mold-turning cavity 104 on one side of the support foot 103, a driving mechanism 2 inside the mixing chamber 101, a connecting column 201 movably connected to the bottom outer surface of the driving mechanism 2, a limiting plate 202 movably connected to the outside of the connecting column 201, a driving gear 203 fixedly connected to the bottom outer surface of the limiting plate 202, a placement frame 204 at the bottom of the driving gear 203, a connecting plate 205 fixedly connected to the outer surface of the placement frame 204, a driven gear 206 movably connected to the top outer surface of the placement frame 204, and a mixing mechanism 207 fixedly connected to the bottom of the driven gear 206.

[0025] The mold-forming cavity 104 is fixedly connected to the bottom end of the mixing cavity 101. The connecting column 201 passes through the limiting plate 202 and is fixedly connected to the placement frame 204. The outer surface of the driving gear 203 is tightly fitted with the driven gear 206, and the driving gear 203 and the driven gear 206 are meshed. The number of driven gears 206 is set to three, and the driven gears 206 pass through the placement frame 204 and are fixedly connected to the mixing mechanism 207. The outer surface of the connecting plate 205 is fixedly connected to the inner surface of the mixing cavity 101. When the device is working, the operator pours the mixture of phenol urea resin and abrasive into the device from the inlet 1. When the mixture is inside the mixing cavity 101, the device is started to make the driving gear... The wheel 203 starts to rotate, and the rotation of the driving gear 203 drives the driven gear 206 of the external meshing transmission to start rotating. The driven gear 206 drives the bottom stirring mechanism 207 to rotate. The surface of the stirring mechanism 207 with its threaded shape has more contact area and more contact points with the mixed sand, thereby increasing the stirring effect and better pushing the sand particles from the center to the edge, so that the various sand particles can be mixed more evenly. At the same time, the threaded rod can generate a larger tangential force during the stirring process, making it easier for the sand particles to move along the threaded rod and improving the fluidity of the mixture. The connecting plate 205 fixes the placement frame 204 to the inner wall of the stirring chamber 101, so that the stirring mechanism 207 can operate stably.

[0026] Example 2, please refer to Figure 4 and Figure 5 .

[0027] The bottom outer surface of the placement rack 204 is movably connected to a linkage mechanism 3. The bottom outer surface of the linkage mechanism 3 is fixedly connected to a connecting rod 301. The outside of the connecting rod 301 is fixedly connected to a placement ring 302. The outer surface of the placement ring 302 is fixedly connected to two sets of connecting platforms 303. The inner surface of the connecting platform 303 is movably connected to a rotating shaft 304. The outer surface of the rotating shaft 304 is fixedly connected to a first connecting strip 305. The two sides of the first connecting strip 305 are provided with second connecting strips 306. The outer surface of one side of the second connecting strip 306 is fixedly connected to a cleaning end 307. The outer surface of the linkage mechanism 3 is provided with two sets of first slots 308.

[0028] Placement rings 302 are evenly distributed along the vertical direction of connecting rods 301, and are arranged in a set. Connecting platforms 303 are arranged in upper and lower semi-circular sets, and are distributed in a ring around the outer surface of placement rings 302. There are two sets of connecting platforms 303. The rotating shaft 304 is rotatably connected to the connecting platform 303. The second connecting strip 306 is symmetrically distributed on both sides of the outer surface of the first connecting strip 305. The second connecting strip 306 is fixed between the rotating shaft 304 and the cleaning end 307. The first connecting strip 305 and the second connecting strip 306 are both made of soft elastic material. The cleaning end 307 forms a rotating structure with the linkage mechanism 3 through the cooperation between the first connecting strip 305 and the rotating shaft 304. The first slot 308 is formed on the outer side of the linkage mechanism 3. On the surface, the linkage mechanism 3 and the placement frame 204 are rotatably connected. After the mixing mechanism 207 has finished mixing the raw materials, the first connecting strip 305 rotates to the open state through the rotating shaft 304. The linkage mechanism 3 and the placement frame 204 are rotatably connected. When the linkage mechanism 3 rotates, it drives the bottom connecting rod 301 and the second slot 402 to rotate together. When the connecting rod 301 rotates, it drives the second connecting strip 306 and the first connecting strip 305 to rotate together. At the same time, the external cleaning end 307 rotates along with it. When the cleaning end 307 rotates, it cleans the surface of the mixing mechanism 207, so that the sand particles attached to the outside of the mixing mechanism 207 fall off, so as to keep the mixing mechanism 207 running smoothly, improve production efficiency, and prevent clogging problems.

[0029] Example 3, please refer to Figure 4 .

[0030] The top outer surface of the linkage mechanism 3 is provided with a movable groove 4, and a linkage rod 401 is movably connected to the outer surface of the movable groove 4. Two sets of second grooves 402 are provided on the outer surface of the linkage rod 401. A rotating ring 403 is movably connected to the inner surface of the bottom end of the linkage rod 401. A connecting plate 404 is fixedly connected to the inner surface of the rotating ring 403.

[0031] The linkage rod 401 is rotatably connected to the movable slot 4. The linkage rod 401 is movably connected to the linkage mechanism 3 through the movable slot 4. The second slot 402 is circumferentially opened on the outer surface of the linkage rod 401. Two sets of the second slot 402 are opened. The connecting plate 404 is fixedly connected to the bottom of the linkage mechanism 3. The rotating ring 403 is movably connected to the second slot 402. After the cleaning end 307 has finished cleaning, the rotating shaft 304 controls the first connecting bar 305 to rotate downward, so that the cleaning end 307 is retracted into the linkage mechanism 3 from the first slot 308. Then, the external linkage rod 401 is rotated so that the second slot 402 and the first slot 308 are staggered, covering the outside of the linkage mechanism 3. The device protects the internal parts of the linkage mechanism 3 when cleaning is not required, so that the cleaning end 307 can be retracted into the linkage mechanism 3.

[0032] Example 4, please refer to Figure 6 and Figure 7 .

[0033] A filter disc 5 is fixedly connected to the inner surface of the mixing chamber 101. A movable shaft 501 is fixedly connected to the inner surface of the bottom end of the filter disc 5. A crushing rod 502 is movably connected to the outer surface of the movable shaft 501. A processing chamber 6 is provided at the bottom of the filter disc 5. A locking block 601 is movably connected to the outer surfaces of both sides of the processing chamber 6. A guide ring 602 is fixedly connected to the inner surface of the processing chamber 6. A push rod 603 is movably connected to the bottom outer surface of the guide ring 602. A material drop platform 604 is provided at the bottom of the push rod 603.

[0034] The filter disc 5 is inverted conical in shape, with several small holes penetrating its inner and outer surfaces. The movable shaft 501 is rotatably connected to the crushing rod 502. The outer surface of the bottom end of the crushing rod 502 is tightly fitted to the inner surface of the filter disc 5. The processing cavity 6 is fixed inside the mold-turning cavity 104. The processing cavity 6 is detachable via a locking block 601. The guide ring 602 is hollow, and push rods 603 are symmetrically distributed on both sides of the bottom of the guide ring 602. The discharge table 604 is fixed to the bottom of the mold-turning cavity 104. The evenly mixed sand falls onto the top of the filter disc 5 and is discharged from the filter disc. The material leaks into the bottom through the small hole at the inner end of the filter disc 5. The crushing rod 502 rotates against the inner wall of the filter disc 5 to crush the clumps of raw material, allowing the raw material to leak to the bottom of the device. At the same time, it prevents the filter disc 5 from becoming clogged, so that the device can be used normally. The processed raw material is processed inside the processing chamber 6. Artificial molding is performed inside the processing chamber 6. The clamping block 601 allows the processing chamber 6 to be disassembled, making it easy for workers to flip the mold. After the mixed sand is dried and drained, the strength of the sand core raw material is increased. The push rod 603 makes it easy for the raw material to be demolded, thereby producing the sand core for casting.

[0035] Working principle: When the device is working, the operator pours the mixture of phenol urea resin and abrasive sand into the device through the feed port 1. When the mixture is inside the mixing chamber 101, the device is started to make the drive gear 203 start to rotate. The rotation of the drive gear 203 drives the driven gear 206 of the external meshing transmission to start rotating. The driven gear 206 drives the bottom stirring mechanism 207 to rotate. The surface of the threaded stirring mechanism 207 has more contact area and more contact points with the mixed sand, thereby increasing the stirring effect and better pushing the sand particles from the center to the edge, so that the various sand particles can be mixed more evenly. At the same time, the threaded rod can generate a larger tangential force during the stirring process, making it easier for the sand particles to move along the threaded rod and improving the fluidity of the mixture. The connecting plate 205 fixes the placement frame 204 to the inner wall of the mixing chamber 101, so that the stirring mechanism 207 can operate stably. After the mixing mechanism 207 has finished mixing the raw materials, the first connecting bar 305 rotates to the open state through the rotating shaft 304. The linkage mechanism 3 is rotatably connected to the placement frame 204. When the linkage mechanism 3 rotates, it drives the bottom connecting rod 301 and the second slot 402 to rotate together. When the connecting rod 301 rotates, it drives the second connecting bar 306 and the first connecting bar 305 to rotate together. At the same time, the external cleaning end 307 rotates along with it. When the cleaning end 307 rotates, it cleans the surface of the mixing mechanism 207, so that the sand particles attached to the outside of the mixing mechanism 207 fall off, so as to keep the mixing mechanism 207 running smoothly, improve production efficiency, and prevent the occurrence of clogging problems. After the cleaning end 307 has finished cleaning, the rotating shaft 304 controls the first connecting bar 305 to rotate downward, so that the cleaning end 307 is retracted into the linkage mechanism 3 from the first slot 308. Then, the external linkage rod 401 is rotated so that the second slot 402 is staggered with the first slot 308, covering the outside of the linkage mechanism 3. The device protects the internal parts of the linkage mechanism 3 when cleaning is not required, so that the cleaning end 307 can be retracted into the linkage mechanism 3. The well-stirred mixed sand falls onto the top of the filter plate 5 and leaks into the bottom through the small hole at the inner end of the filter plate 5. The crushing rod 502 rotates against the inner wall of the filter plate 5 to crush the lumpy raw material, so that the raw material can leak to the bottom of the device. At the same time, it prevents the filter plate 5 from becoming blocked, so that the device can be used normally. The processed raw material is processed inside the processing chamber 6. Artificial molding is performed inside the processing chamber 6. The clamping block 601 allows the processing chamber 6 to be disassembled, making it easy for workers to flip the box and remove the mold. After the mixed sand is dried and drained, the strength of the sand core raw material is increased. The push rod 603 makes it easy for the raw material to be demolded, thereby manufacturing the sand core for casting.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sand casting apparatus employing a mixture of phenolic urea resin and granulated sand, comprising an inlet (1), characterized in that: A stirring chamber (101) is fixedly connected to the bottom outer surface of the inlet (1). A fixing plate (102) is fixedly connected to the bottom outer side of the stirring chamber (101). A support foot (103) is fixedly connected to the bottom outer surface of the fixing plate (102). A mold-flipping cavity (104) is provided on one side of the support foot (103). A driving mechanism (2) is provided inside the stirring chamber (101). A connecting column (201) is movably connected to the bottom outer surface of the driving mechanism (2). The external of the connecting column (201) is movably connected to a limiting disk (202). The bottom outer surface of the limiting disk (202) is fixedly connected to a drive gear (203). The bottom of the drive gear (203) is provided with a placement frame (204). The outer surface of the placement frame (204) is fixedly connected to a connecting plate (205). The top outer surface of the placement frame (204) is movably connected to a driven gear (206). The bottom of the driven gear (206) is fixedly connected to a stirring mechanism (207). The bottom outer surface of the placement rack (204) is movably connected to a linkage mechanism (3), the bottom outer surface of the linkage mechanism (3) is fixedly connected to a connecting rod (301), the outside of the connecting rod (301) is fixedly connected to a placement ring (302), the outer surface of the placement ring (302) is fixedly connected to two sets of connecting platforms (303), the inner surface of the connecting platform (303) is movably connected to a rotating shaft (304), the outer surface of the rotating shaft (304) is fixedly connected to a first connecting strip (305), the two sides of the first connecting strip (305) are provided with second connecting strips (306), the outer surface of one side of the second connecting strip (306) is fixedly connected to a cleaning end (307), and the outer surface of the linkage mechanism (3) is provided with two sets of first slots (308). The placement rings (302) are evenly distributed along the vertical direction of the connecting rod (301). The placement rings (302) are set as a group. The connecting platform (303) is set as an upper and lower semi-circular group. The connecting platform (303) is distributed in a ring about the outer surface of the placement ring (302). There are two sets of connecting platforms (303). The rotating shaft (304) is rotatably connected to the connecting platform (303). The second connecting strip (306) is symmetrically distributed on both outer surfaces of the first connecting strip (305). The second connecting strip (306) is fixed between the rotating shaft (304) and the cleaning end (307). The first connecting strip (305) and the second connecting strip (306) are both made of soft elastic material. The cleaning end (307) forms a rotating structure with the linkage mechanism (3) through the cooperation between the first connecting strip (305) and the rotating shaft (304). The first slot (308) is opened on the outer surface of the linkage mechanism (3). The linkage mechanism (3) and the placement rack (204) are rotatably connected.

2. The sand casting apparatus using a mixture of phenolic urea resin and granulated sand according to claim 1, characterized in that: The top outer surface of the linkage mechanism (3) is provided with a movable groove (4), and the outer surface of the movable groove (4) is movably connected to a linkage rod (401). The outer surface of the linkage rod (401) is provided with two sets of second grooves (402). The inner surface of the bottom end of the linkage rod (401) is movably connected to a rotating ring (403), and the inner surface of the rotating ring (403) is fixedly connected to a connecting plate (404).

3. The sand casting apparatus using a mixture of phenolic urea resin and granulated sand according to claim 2, characterized in that: A filter disc (5) is fixedly connected to the inner surface of the stirring chamber (101). A movable shaft (501) is fixedly connected to the inner surface of the bottom end of the filter disc (5). A crushing rod (502) is movably connected to the outer surface of the movable shaft (501). A processing chamber (6) is provided at the bottom of the filter disc (5). A locking block (601) is movably connected to the outer surfaces of both sides of the processing chamber (6). A guide ring (602) is fixedly connected to the inner surface of the processing chamber (6). A push rod (603) is movably connected to the bottom outer surface of the guide ring (602). A material drop platform (604) is provided at the bottom of the push rod (603).

4. The sand casting apparatus using a mixture of phenolic urea resin and granulated sand according to claim 3, characterized in that: The mold-flipping cavity (104) is fixedly connected to the bottom end of the mixing cavity (101). The connecting column (201) passes through the limiting plate (202) and is fixedly connected to the placement frame (204). The outer surface of the driving gear (203) is closely fitted with the driven gear (206). The driving gear (203) and the driven gear (206) are meshed. The number of driven gears (206) is set to three. The driven gears (206) pass through the placement frame (204) and are fixedly connected to the mixing mechanism (207). The outer surface of the connecting plate (205) is fixedly connected to the inner surface of the mixing cavity (101).

5. The sand casting apparatus using a mixture of phenolic urea resin and granulated sand according to claim 4, characterized in that: The linkage rod (401) and the movable groove (4) are rotatably connected. The linkage rod (401) is movably connected to the linkage mechanism (3) through the movable groove (4). The second slot (402) is circumferentially opened about the outer surface of the linkage rod (401). The second slot (402) has two sets. The connecting plate (404) is fixedly connected to the bottom of the linkage mechanism (3). The rotating ring (403) and the second slot (402) are movably connected.

6. The sand casting apparatus using a mixture of phenolic urea resin and granulated sand according to claim 5, characterized in that: The filter disc (5) is inverted conical in shape, and several small holes are opened through the inner and outer surfaces of the filter disc (5). The movable shaft (501) and the crushing rod (502) are rotatably connected. The outer surface of the bottom end of the crushing rod (502) is tightly fitted with the inner surface of the filter disc (5). The processing cavity (6) is fixed inside the mold-turning cavity (104). The processing cavity (6) is detachable through the locking block (601). The guide ring (602) is hollow. The push rods (603) are symmetrically distributed on both sides of the bottom of the guide ring (602). The dropping platform (604) is fixed at the bottom of the mold-turning cavity (104).

7. The production process using the mixed sand casting apparatus of phenol-urea resin and granulated sand as described in any one of claims 3-6, characterized in that, Includes the following steps: S1. When the device is in operation, the staff pours the mixture of phenol urea resin and granulated sand into the device from the feed port (1). When the mixture is in the mixing chamber (101), the drive gear (203) rotates, thereby driving the driven gear (206) and the stirring mechanism (207) of the external meshing transmission to rotate. S2. The stirring mechanism (207) with a threaded shape can improve the fluidity of the mixture; S3. After the mixing mechanism (207) has finished mixing the raw materials, the first connecting bar (305) rotates to the open state through the rotating shaft (304). When the linkage mechanism (3) rotates, it drives the bottom connecting rod (301) and the second slot (402) to rotate together. When the connecting rod (301) rotates, it drives the external cleaning end (307) to rotate as well. S4. The cleaning end (307) cleans the surface of the stirring mechanism (207) when it rotates, so that the sand particles attached to the outside of the stirring mechanism (207) fall off. S5. After the cleaning work at the cleaning end (307) is completed, the rotating shaft (304) controls the first connecting bar (305) to rotate downward, so that the cleaning end (307) is taken into the linkage mechanism (3) from the first slot (308). Then, the external linkage rod (401) is rotated so that the second slot (402) is staggered with the first slot (308) to cover the outside of the linkage mechanism (3). S6. The well-stirred mixed sand falls above the filter plate (5) and leaks into the bottom through the small hole at the inner end of the filter plate (5). The crushing rod (502) rotates against the inner wall of the filter plate (5) to crush the clumped raw material so that the raw material can leak out to the bottom of the device. S7. The processed raw material is processed inside the processing cavity (6). Artificial shaping is performed inside the processing cavity (6). The clamp (601) allows the processing cavity (6) to be disassembled to produce a sand core for casting.

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