Resin sand mixing device for casting

Abstract

The invention belongs to the field of sand mold casting, and particularly relates to a resin sand mixing device for casting, which comprises a rack, a driving device connected right above the rack, a stirring barrel connected to the rack, a feeding device connected to the side surface of the stirring barrel, a stirring bracket shaft device rotatably connected in the stirring barrel, and a first stirring device fixedly connected to the lower end of the stirring barrel. An adding box device is arranged at the center of the first stirring device, a stirring support shaft device is fixedly connected with a vertical conveying auger device distributed in the circumferential direction, a vertical guide mounting cylinder is arranged on the outer side of the conveying auger device, and a second stirring device is slidably connected to the guide mounting cylinder; according to the resin sand mixing device, sand, a curing agent and resin can be separately stirred, the sand, the curing agent and the resin can be alternately and circularly stirred and mixed, the resin sand mixing effect is improved, the resin sand quality is improved, the production efficiency is improved, and the production cost is reduced. The stirring efficiency is ensured.

Description

Technical Field

[0001] The invention belongs to the field of sand casting, and in particular relates to a resin sand mixing device for casting. Background Art

[0002] Sand casting is a common process for the production of metal castings. The main process of sand casting is: first mix sand to make a mold, leave a cavity in the mold that matches the shape of the workpiece, then pour liquid metal into the cavity, and wait for the metal to solidify before demolding. Molding sand is crucial to the quality of casting. When processing sand, it is divided into two mixing stages: first add curing agent to the sand, stir evenly, and then add resin and stir evenly, otherwise the curing agent will preferentially cross-link with the resin and become sticky, reducing the quality of the resin sand.

[0003] The Chinese patent application number CN202311166827.5 discloses a foundry resin sand mixing device, including a mixing drum, a spiral plate is arranged on the rotating shaft of the mixing drum, stirring mechanisms are arranged on both sides of the rotating shaft, a spraying mechanism for spraying resin and curing agent is arranged on the upper part of the rotating shaft, a discharge port is arranged at the lower part of the mixing drum, the discharge port is connected to the feed pipe of the conveyor arranged below the mixing drum, and a buffer structure is arranged on the discharge port of the conveyor. The mounting frame of the stirring mechanism is fixedly connected to the rotating shaft through a connecting rod, a rotating plate is arranged on the mounting frame, and a plurality of stirring rods are arranged on the rotating plate. A rotating structure for driving the rotating plate to rotate is arranged inside the mixing drum, which can solve the problem of poor mixing effect of sand material and resin and meet the needs of mass resin sand production. However, there are still some problems: although the above-mentioned device sprays the resin and the curing agent separately, the two mixing stages are not separated. It is difficult to ensure that the curing agent and the sand are mixed evenly before adding the resin. The curing agent will still partially cross-link with the resin and become sticky, affecting the mixing effect of the resin sand and reducing the quality of the resin sand. In addition, whether it is the resin or the curing agent, the mixing time with the sand is short, and the mixing effect needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a resin sand mixing device for casting, which stirs the sand, curing agent and resin separately to ensure that the curing agent and sand are evenly mixed before adding the resin, thereby improving the mixing effect of the resin sand and the quality of the resin sand. At the same time, the sand is circulated and stirred during the entire stirring process to ensure the stirring efficiency, thereby effectively solving the problems existing in the prior art.

[0005] To achieve the above purpose, the specific technical solutions of the present invention are as follows: A resin sand mixing device for casting comprises a frame, a driving device is fixedly connected to the top of the frame, a mixing drum is connected to the frame, a feeding device is connected to the side of the mixing drum, a mixing bracket shaft device is rotatably connected in the mixing drum, a first mixing device is fixedly connected to the lower end of the mixing drum, an adding box device is arranged at the center of the first mixing device, the first mixing device is located directly below the mixing bracket shaft device, the mixing bracket shaft device comprises a main shaft, an upper bracket and a lower bracket which are arranged correspondingly up and down are fixedly connected to the main shaft, a vertical circumferentially distributed conveying auger device is fixedly connected between the upper bracket and the lower bracket, a vertical guide installation cylinder is fixedly connected to the outer ends of the upper bracket and the lower bracket, a second mixing device is slidably connected to the guide installation cylinder, a circumferentially distributed disturbance disk device is rotatably connected in the second mixing device, and the disturbance disk device is slidably connected to the conveying auger device.

[0006] As a further arrangement of the above scheme, a vibration device is provided at the upper end of the guide mounting cylinder, and a vibration column is provided on the vibration device which vertically extends downward into the guide mounting cylinder. A cleaning roller device is provided at the center of the outer wall of the guide mounting cylinder, and the cleaning roller device includes a mounting platform, which is fixedly mounted on the guide mounting cylinder, and a cleaning roller is hinged on the mounting platform. A torsion spring is provided between the cleaning roller and the mounting platform, and under the action of the torsion spring, the cleaning roller is driven to roll in contact with the inner wall of the mixing drum.

[0007] As a further configuration of the above solution, a vertically upward guiding cylinder is provided on the upper end surface of the lower bracket, and a vertically downward first disturbance column is provided on the lower end surface of the lower bracket.

[0008] As a further configuration of the above scheme, the conveying auger device includes a conveying cylinder, the upper end of the conveying cylinder is fixedly connected to the upper bracket, the lower end of the conveying cylinder is fixedly connected to the lower bracket and extends downward out of the lower bracket, the outer wall of the upper end of the conveying cylinder is provided with circumferentially distributed through grooves, an auger conveying shaft is rotatably connected in the conveying cylinder, the upper end of the auger conveying shaft is connected to a driving motor, and the lower end of the auger conveying shaft extends downward out of the conveying cylinder.

[0009] As a further configuration of the above scheme, the second stirring device includes a second stirring drum, an outer wall of the second stirring drum is provided with a mounting groove, the mounting groove is slidably connected to the outer wall of the guide mounting cylinder, a slide is fixedly connected in the mounting groove, the slide is slidably connected to the inner wall of the guide mounting cylinder, the slide abuts against the vibration column, a circumferentially arranged rotating circular grooves are provided on the bottom plate of the second stirring drum, a buffer spring column and a drive box are provided on the lower end surface of the bottom plate of the second stirring drum, and the buffer spring column is located in the guide cylinder.

[0010] As a further configuration of the above scheme, the disturbance disk device includes a disturbance disk, which is rotatably installed in a rotating circular groove. A rotating mounting circular table is provided at the center of the disturbance disk. A pulley is fixedly connected to the lower end of the rotating mounting circular table. A transmission belt is transmission-connected to the pulley. The transmission belt is transmission-connected to the drive box. The inner wall of the rotating mounting circular table is rotatably connected to the conveying auger device. An oblique circular groove is opened on the upper end surface of the disturbance disk, and a second disturbance column vertically upward is provided on the oblique circular groove.

[0011] As a further configuration of the above scheme, the first stirring device includes a first stirring disk, a guide groove is opened on the upper end surface of the first stirring disk, a stirring circular groove is opened at the center of the guide groove, a vertical downward discharge device is arranged on the stirring circular groove, and the lower end of the conveying auger device extends into the stirring circular groove.

[0012] As a further arrangement of the above scheme, the adding box device is fixedly installed at the center of the stirring circular groove, the adding box device includes an adding box, a guide round table is arranged at the upper end of the adding box, the upper end surface of the guide round table is rotatably connected to the main shaft, the outer wall of the adding box is provided with circumferentially arranged and staggered fixing agent nozzles and resin nozzles, the fixing agent nozzles and the resin nozzles are located in the stirring circular groove, the fixing agent nozzles and the resin nozzles are correspondingly connected with a fixing agent delivery pipe and a resin delivery pipe, the fixing agent delivery pipe and the resin delivery pipe can deliver the fixing agent and the resin to the fixing agent nozzle and the resin nozzle respectively, and the adding box control can alternately add the fixing agent and the resin.

[0013] As a further configuration of the above scheme, the feeding device includes a feeding pipe, which is fixedly connected to the frame, the inner end of the feeding pipe is connected to the mixing drum, and a hopper is provided at the outer end of the feeding pipe. A feeding auger is rotatably connected inside the feeding pipe, and sand is poured into the hopper. The feeding auger rotates to drive the sand from the feeding pipe into the mixing drum, and the sand falls onto the first stirring device.

[0014] Beneficial effects of the present invention: Mixing mode 1: The feeding device adds a fixed amount of sand into the mixing drum, and the sand falls onto the first mixing device. The adding box controls the fixing agent nozzle to add fixing agent to the sand. The driving device drives the mixing bracket shaft device to rotate. The lower end of the conveying auger device and the lower bracket pre-mix the sand. The driving motor drives the auger conveying shaft to rotate, and the sand is conveyed from the conveying drum to the second mixing device. The driving box drives the disturbance disk device to rotate. After the sand and the fixing are completely mixed, the auger conveying shaft reverses and the sand is conveyed back to the first mixing device. The adding box controls the resin nozzle to add resin to the sand. The auger conveying shaft reverses again. While the lower end of the conveying auger device and the lower bracket pre-mix the sand, the sand is conveyed to the second mixing device for mixing again. The sand, curing agent and resin are stirred separately to ensure that the curing agent and the sand are evenly mixed before adding the resin, thereby improving the mixing effect of the resin sand and the quality of the resin sand.

[0015] Mixing mode 2: During the mixing process, half of the auger conveying shafts rotate clockwise, and the other half rotate forward, so that the sand is circulated up and down in the mixing drum. The adding box device alternately adds fixative and resin, and the first mixing device, the lower bracket, the second mixing device, and the disturbance disk device are used for mixing, which greatly increases the mixing contact time of the sand, fixative and resin and improves the mixing effect.

[0016] During the rotation of the stirring bracket shaft device, the cleaning roller device is driven to roll on the inner wall of the stirring drum to clean the stirring drum and ensure normal stirring. During the stirring process, in conjunction with the buffer spring column and the guide cylinder, the vibration device drives the second stirring device to vibrate up and down through the vibration column to further improve the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the stirring mechanism of the present invention; Figure 3 It is an axonometric view of the stirring support shaft device of the present invention; Figure 4 It is a cross-sectional schematic diagram of the stirring support shaft device of the present invention; Figure 5 is a first schematic diagram of a second stirring device of the present invention; Figure 6 is a second schematic diagram of a second stirring device of the present invention; Figure 7 is a third schematic diagram of the second stirring device of the present invention; Figure 8 is a schematic diagram of a first stirring device of the present invention; Fig. 9 It is a schematic diagram of a cleaning brush device of the present invention; Fig.10 It is a schematic diagram of the adding box device of the present invention.

[0018] Frame; 2, driving device; 3, mixing drum; 4, first mixing device; 5, mixing bracket shaft device; 6, conveying auger device; 7, second mixing device; 8, disturbance disk device; 9, feeding device; 10, adding box device; 401, first mixing disk; 402, guide groove; 403, mixing circular groove; 404, discharging device; 501, main shaft; 502, upper bracket; 503, guide installation cylinder; 504, vibration device; 5041, vibration column; 505, cleaning roller device; 5051, mounting table; 5052, cleaning roller; 5053, torsion spring; 506, lower bracket; 5061, guide cylinder; 5062, first disturbance column; 601 , conveying cylinder; 6011, through groove; 602, auger conveying shaft; 603, driving motor; 701, second mixing cylinder; 7011, mounting groove; 7012, slide; 7013, rotating circular groove; 702, buffer spring column; 703, driving box; 801, disturbance disk; 8011, inclined circular groove; 802, rotating mounting round table; 803, pulley; 804, transmission belt; 805, second disturbance column; 901, feeding pipe; 902, hopper; 903, feeding auger; 1001, adding box; 1002, guide round table; 1003, fixing agent nozzle; 1004, resin nozzle; 1005, fixing agent conveying pipe; 1006, resin conveying pipe. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 10 The present application is described in detail with reference to embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3As shown, this embodiment discloses a resin sand mixing device for casting, a driving device 2 is fixedly connected to the top of the frame 1, a mixing drum 3 is connected to the frame 1, a feeding device 9 is connected to the side of the mixing drum 3, the feeding device 9 includes a feeding pipe 901, the feeding pipe 901 is fixedly connected to the frame 1, the inner end of the feeding pipe 901 is connected to the mixing drum 3, a hopper 902 is arranged at the outer end of the feeding pipe 901, a feeding auger 903 is rotatably connected inside the feeding pipe 901, sand material is poured into the hopper 902, and the feeding auger 903 rotates to drive the sand material from the feeding pipe 901 to the mixing drum 3.

[0022] A stirring bracket shaft device 5 is rotatably connected in the stirring drum 3, a first stirring device 4 is fixedly connected to the lower end of the stirring drum 3, an adding box device 10 is arranged at the center of the first stirring device 4, and the first stirring device 4 is located directly below the stirring bracket shaft device 5. The stirring bracket shaft device 5 includes a main shaft 501, an upper bracket 502 and a lower bracket 506 which are arranged correspondingly up and down are fixedly connected to the main shaft 501, a vertical circumferentially distributed conveying auger device 6 is fixedly connected between the upper bracket 501 and the lower bracket 506, a vertical guide installation cylinder 503 is fixedly connected to the outer ends of the upper bracket 502 and the lower bracket 506, a second stirring device 7 is slidably connected to the guide installation cylinder 503, a circumferentially distributed disturbance disk device 8 is rotatably connected in the second stirring device 7, and the disturbance disk device 8 is slidably connected to the conveying auger device 6.

[0023] like Figure 3 , Figure 4 As shown, a vibration device 504 is arranged at the upper end of the guide mounting cylinder 503, and a vibration column 5041 is arranged on the vibration device 504 and vertically extends downward into the guide mounting cylinder 503. A cleaning roller device 505 is arranged at the center of the outer wall of the guide mounting cylinder 503, and the cleaning roller device 505 comprises a mounting platform 5051, and the mounting platform 5051 is fixedly mounted on the guide mounting cylinder 503. A cleaning roller 5052 is hinged on the mounting platform 5051, and a torsion spring 5053 is arranged between the cleaning roller 5052 and the mounting platform 5051. Under the action of the torsion spring 5053, the cleaning roller 5051 is driven to roll with the inner wall of the mixing drum 3. A vertically upward guide cylinder 5061 is arranged on the upper end surface of the lower bracket 506, and a vertically downward first disturbance column 5062 is arranged on the lower end surface of the lower bracket 506.

[0024] The conveying auger device 6 includes a conveying cylinder 601, the upper end of which is fixedly connected to the upper bracket 502, the lower end of which is fixedly connected to the lower bracket 506 and extends downwardly out of the lower bracket 506, and a circumferentially distributed through grooves 6011 are opened on the outer wall of the upper end of the conveying cylinder 601. An auger conveying shaft 602 is rotatably connected inside the conveying cylinder 601, the upper end of the auger conveying shaft 602 is connected to a driving motor 603, and the lower end of the auger conveying shaft 602 extends downward out of the conveying cylinder 601.

[0025] like Figure 5 , Figure 6 , Figure 7 As shown, the second stirring device 7 includes a second stirring drum 701, the outer wall of the second stirring drum 701 is provided with a mounting groove 7011, the mounting groove 7011 is slidably connected to the outer wall of the guide mounting cylinder 503, a slide 7012 is fixedly connected in the mounting groove 7011, the slide 7012 is slidably connected to the inner wall of the guide mounting cylinder 503, the slide 7012 abuts against the vibration column 5041, and a circumferentially arranged rotating circular grooves 7013 are provided on the bottom plate of the second stirring drum 701, and a buffer spring column 702 and a drive box 703 are provided on the lower end surface of the bottom plate of the second stirring drum 701, and the buffer spring column 702 is located in the guide cylinder 5061.

[0026] like Figure 8 As shown, the disturbance disk device 8 includes a disturbance disk 801, which is rotatably installed in a rotating circular groove 7013. A rotatable installation circular table 802 is provided at the center of the disturbance disk 801. A pulley 803 is fixedly connected to the lower end of the rotatable installation circular table 802. A transmission belt 804 is transmission-connected to the pulley 803. The transmission belt 804 is transmission-connected to the drive box 703. The inner wall of the rotatable installation circular table 802 is rotatably connected to the conveying auger device 6. An oblique circular groove 8011 is opened on the upper end surface of the disturbance disk 801, and a second disturbance column 805 vertically upward is provided on the oblique circular groove 8011.

[0027] like Fig. 9 , Fig.10 As shown, the first stirring device 4 includes a first stirring disk 401, a guide groove 402 is provided on the upper end surface of the first stirring disk 401, a stirring circular groove 403 is provided at the center of the guide groove 402, a vertical downward discharge device 404 is arranged on the stirring circular groove 403, the lower end of the conveying auger device 6 extends into the stirring circular groove 403, the adding box device 10 is fixedly installed at the center of the stirring circular groove 403, the adding box device 10 includes an adding box 1001, a guide frustum 1002 is provided on the upper end of the adding box 1001, the upper end surface of the guide frustum 1002 is rotatably connected to the main shaft 501, the outer wall of the adding box 1001 is provided with circumferentially arranged and staggered fixing agent nozzles 1003 and resin nozzles 1004, the fixing agent nozzles 1003 and the resin nozzles 1004 are located in the stirring circular groove 403, and the fixing agent nozzles 1003 and the resin nozzles 1004 are correspondingly connected with fixing agent delivery pipes 1005 and resin delivery pipes 1006.

[0028] Working process: In the case of small batches and high mixing precision, the feeding device 9 adds a fixed amount of sand into the mixing drum 3, and the sand falls into the mixing circular groove 403 on the first mixing device 4. The adding box 1001 controls the fixing agent nozzle 1003 to add fixing agent to the sand. The driving device 2 drives the mixing bracket shaft device 5 to rotate, and the first disturbance column 5062 at the lower end of the conveying auger device 6 and the lower bracket 506 pre-mixes the sand. The driving motor 603 drives the auger conveying shaft 602 to rotate, and the sand is conveyed upward from the conveying drum 601 to the second mixing device 7. The sand falls from the through groove 6011 into the second mixing drum 701. The driving box 703 drives the disturbance disk device 8 to rotate. After the sand and the fixing agent are completely mixed, the auger conveying shaft 602 is reversed to convey the sand back to the first mixing drum 701. On the device 4, the adding box 1001 controls the resin nozzle 1004 to add resin to the sand material, and the auger conveying shaft 602 reverses again. The lower end of the conveying auger device 6 and the lower bracket 506 pre-mix the sand material, and then convey the sand material to the second stirring device 7 for stirring again. The stirring of the sand material and the curing agent, and the stirring of the sand material and the resin are carried out separately, which can ensure that the curing agent and the sand material are mixed evenly before adding the resin, so as to avoid the curing agent preferentially cross-linking with the resin and becoming sticky; during the rotation of the stirring bracket shaft device 5, the cleaning roller device 505 is driven to roll on the inner wall of the mixing drum 3 to clean the mixing drum 3 to ensure normal stirring. During the stirring process, in conjunction with the buffer spring column 702 and the guide cylinder 5061, the vibration device 504 drives the second stirring device 7 to vibrate up and down through the vibration column 5041 to further improve the mixing efficiency.

[0029] In large-scale mixing occasions, when the equipment is mixing, half of the auger conveying shafts 602 rotate forward, and the other half rotate forward, so that the sand material is circulated up and down in the mixing drum 3, and the sand material is mixed in the first mixing device 4 and the second mixing device 7. At the same time, the adding box device 10 alternately adds the fixing agent and the resin, so as to increase the mixing contact time of the sand material, the fixing agent and the resin, improve the mixing effect, and greatly improve the mixing efficiency.

[0030] After the mixing is completed, the discharging device 404 is opened, and under the action of the rotation and revolution of the auger conveying shaft 602, the mixed sand material is efficiently discharged from the first mixing device 4.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A resin sand mixing device for casting, comprising a frame, a driving device fixedly connected to the frame directly above, a mixing drum connected to the frame, and a feeding device connected to the side of the mixing drum, characterized in that: A stirring bracket shaft device is rotatably connected in the stirring drum, a first stirring device is fixedly connected to the lower end of the stirring drum, an adding box device is arranged at the center of the first stirring device, and the first stirring device is located directly below the stirring bracket shaft device, the stirring bracket shaft device comprises a main shaft, an upper bracket and a lower bracket correspondingly arranged up and down are fixedly connected to the main shaft, a vertical circumferentially distributed conveying auger device is fixedly connected between the upper bracket and the lower bracket, a vertical guide mounting cylinder is fixedly connected to the outer ends of the upper bracket and the lower bracket, a second stirring device is slidably connected to the guide mounting cylinder, a circumferentially distributed disturbance disk device is rotatably connected in the second stirring device, and the disturbance disk device is slidably connected to the conveying auger device.

2. The resin sand mixing device for casting according to claim 1, characterized in that: A vibration device is provided at the upper end of the guide mounting cylinder, and a vibration column is provided on the vibration device and vertically extends downward into the guide mounting cylinder. A cleaning roller device is provided at the center of the outer wall of the guide mounting cylinder. The cleaning roller device includes a mounting platform, which is fixedly mounted on the guide mounting cylinder. A cleaning roller is hinged on the mounting platform, and a torsion spring is provided between the cleaning roller and the mounting platform.

3. The resin sand mixing device for casting according to claim 2, characterized in that: The upper end surface of the lower bracket is provided with a vertically upward guide cylinder, and the lower end surface of the lower bracket is provided with a vertically downward first disturbance column.

4. The resin sand mixing device for casting according to claim 1, characterized in that: The conveying auger device includes a conveying cylinder, the upper end of which is fixedly connected to the upper bracket, the lower end of which is fixedly connected to the lower bracket and protrudes downward from the lower bracket, the outer wall of the upper end of the conveying cylinder is provided with circumferentially distributed through grooves, an auger conveying shaft is rotatably connected inside the conveying cylinder, the upper end of the auger conveying shaft is connected to a driving motor, and the lower end of the auger conveying shaft protrudes downward from the conveying cylinder.

5. The resin sand mixing device for casting according to claim 3, characterized in that: The second stirring device includes a second stirring drum, an outer wall of the second stirring drum is provided with a mounting groove, the mounting groove is slidably connected to the outer wall of the guide mounting cylinder, a slide is fixedly connected in the mounting groove, the slide is slidably connected to the inner wall of the guide mounting cylinder, the slide abuts against the vibration column, a circumferentially arranged rotating circular grooves are provided on the bottom plate of the second stirring drum, a buffer spring column and a drive box are provided on the lower end surface of the bottom plate of the second stirring drum, and the buffer spring column is located in the guide cylinder.

6. The resin sand mixing device for casting according to claim 5, characterized in that: The disturbance disk device includes a disturbance disk, which is rotatably installed in a rotating circular groove. A rotating mounting circular table is provided at the center of the disturbance disk. A pulley is fixedly connected to the lower end of the rotating mounting circular table. A transmission belt is transmission-connected to the pulley. The transmission belt is transmission-connected to a driving box. The inner wall of the rotating mounting circular table is rotatably connected to a conveying auger device. An oblique circular groove is provided on the upper end surface of the disturbance disk, and a second disturbance column vertically upward is provided on the oblique circular groove.

7. The resin sand mixing device for casting according to claim 1, characterized in that: The first stirring device comprises a first stirring disk, a guide groove is formed on the upper end surface of the first stirring disk, a stirring circular groove is formed at the center of the guide groove, and a material discharging device is arranged vertically downward on the stirring circular groove.

8. The resin sand mixing device for casting according to claim 7, characterized in that: The adding box device is fixedly installed at the center of the stirring circular groove, and the adding box device includes an adding box. A guide circular table is arranged at the upper end of the adding box, and the upper end surface of the guide circular table is rotatably connected to the main shaft. The outer wall of the adding box is provided with circumferentially arranged and staggered fixing agent nozzles and resin nozzles. The fixing agent nozzles and the resin nozzles are located in the stirring circular groove, and the fixing agent nozzles and the resin nozzles are correspondingly connected with a fixing agent delivery pipe and a resin delivery pipe.

9. The resin sand mixing device for casting according to claim 1, characterized in that: The feeding device comprises a feeding pipe, which is fixedly connected to the frame, the inner end of the feeding pipe is communicated with the mixing drum, the outer end of the feeding pipe is provided with a hopper, and a feeding auger is rotatably connected inside the feeding pipe.

Images