Intelligent sand blender system

Abstract

The application provides an intelligent sand mixer system in the field of casting, which comprises a sand mixer, a feeding valve, a sand bin, a liquid material feeding device and a vibrating table. The sand bin is used for storing molding sand and feeding the molding sand to the sand mixer through the feeding valve. The sand bin is arranged above the sand mixer. The feeding valve is used for controlling the type and quantity of the molding sand. The feeding valve is arranged between the sand bin and the sand mixer. The liquid material feeding device is used for storing a binder and a curing agent and feeding the binder and the curing agent to the sand mixer. The sand mixer is used for conveying the molding sand and outputting the mixture of the molding sand, the binder and the curing agent for forming a sand mold. The vibrating table is arranged below the sand outlet of the sand mixer and is used for carrying a model and a sand box sleeved on the model and vibrating the mixture in the sand box through vibration. The application reduces the labor intensity, improves the quality of the sand mold and saves the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundry mechanical equipment, and particularly to an intelligent sand mixer system. BACKGROUND

[0002] At present, the sand mixer is the core in the resin sand molding line in China, and manual assistance is required to complete the sand filling and molding, which leads to high labor intensity of sand mixing workers, more harmful gases in the operation area, and is not conducive to the occupational health of workers.

[0003] In the traditional sand mixer liquid material control system, a fixed resin and curing agent ratio is added regardless of the size and difference of the model. Since the resin liquid material is expensive, a large amount of waste is caused. Moreover, the sand mixer cannot realize variable sand supply for the model.

[0004] The existing jolting table adopts a fixed exciting force and exciting frequency regardless of the size and difference of the model, which leads to poor compactness of the sand mold. SUMMARY

[0005] The present application aims to overcome the deficiencies in the prior art, and provides an intelligent sand mixer system, which can realize automatic operation of sand mixing, reduce labor intensity, improve the quality of the sand mold, and realize the ratio control of the binder and the curing agent.

[0006] The technical solution adopted by the embodiments of the present application is as follows:

[0007] An intelligent sand mixer system comprises a sand mixer, a feeding valve, a sand bin, a liquid material supply device, and a jolting table.

[0008] The sand bin is used to store the molding sand and supply the molding sand to the sand mixer through the feeding valve. The sand bin is arranged above the sand mixer.

[0009] The feeding valve is used to control the type and the amount of the molding sand supplied. The feeding valve is arranged between the sand bin and the sand mixer.

[0010] The liquid material supply device is used to store the binder and the curing agent and supply them to the sand mixer.

[0011] The sand mixer is used to convey the molding sand, mix the molding sand with the binder and the curing agent, and then output the mixed material for forming the sand mold.

[0012] The jolting table is arranged below the sand outlet of the sand mixer, and is used to carry the model and the sand box sleeved on the model, and to realize the jolting of the mixed material in the sand box through vibration.

[0013] Further, the system further comprises a model, a sand box, and a model conveying device.

[0014] The sand box is sleeved on the model; the model conveying device is arranged on both sides of the jolter, the model conveying device on one side is used for carrying the model and the empty sand box sleeved on the model and conveying to the jolter, and the model conveying device on the other side is used for outputting the model and the sand box after sand filling sleeved on the model.

[0015] Further, the sand warehouse is divided into at least two sand compartments for storing different types of molding sand.

[0016] The feeding valve comprises a plug valve, a buffer sand hopper, a sand mixing proportioning valve and a sand discharging hopper; the buffer sand hopper is arranged below the sand warehouse, and the buffer sand hopper is divided into a plurality of buffer compartments corresponding to the sand compartments one by one; the plug valve is arranged in each buffer compartment; the sand mixing proportioning valve is connected below the buffer sand hopper; each buffer compartment of the buffer sand hopper corresponds to each sand channel in the sand mixing proportioning valve one by one; the sand discharging hopper is connected below the sand mixing proportioning valve; and the sand discharging hopper is connected to the sand inlet of the sand mixer.

[0017] Further, the sand mixing proportioning valve comprises a flow orifice plate; the flow orifice plate is provided with flow sand holes corresponding to each buffer compartment and sand compartment and capable of adjusting flow; a pneumatic valve plate is arranged below each flow sand hole to realize the opening and closing of the flow sand hole; and each pneumatic valve plate is driven by a corresponding flow adjusting cylinder.

[0018] Further, the sand warehouse is divided into a front sand compartment and a back sand compartment.

[0019] A quantitative orifice plate is arranged in the flow sand hole corresponding to the back sand compartment.

[0020] A flow plug valve is arranged below the flow sand hole corresponding to the front sand compartment, and the flow plug valve is connected to an adjusting screw assembly.

[0021] Further, the sand warehouse is divided into a first front sand compartment, a second front sand compartment and a back sand compartment; and the back sand compartment is located between the two front sand compartments.

[0022] On the flow orifice plate, one flow sand hole corresponding to the back sand compartment is located between two groups of flow sand holes corresponding to the front sand compartments; each group of flow sand holes corresponding to the front sand compartments comprises two flow sand holes, and the two flow sand holes are respectively controlled by the respective configured pneumatic valve plates to realize the opening and closing, and the two pneumatic valve plates of the group of flow sand holes are respectively driven by the flow adjusting cylinders arranged on both sides of the flow orifice plate.

[0023] Further, the sand mixer comprises a sand mixer base, a sand mixer large arm and a sand mixer small arm.

[0024] The large arm and the small arm of the sand mixer are both cylinder structures, and a sand conveying mechanism is arranged in each of the large arm and the small arm; the rear end of the large arm is provided with a sand inlet; the rear end of the large arm is connected to a sand mixer base, and a large arm rotation driving mechanism is arranged in the sand mixer base to drive the large arm to rotate; a large arm pitching driving mechanism is further arranged on the front side of the sand mixer base to drive the large arm to pitch; the front end of the large arm is connected to the rear end of the small arm; a small arm rotation driving mechanism is arranged at the front end of the large arm to drive the small arm to rotate; a stirring mechanism is further arranged in the small arm; and a sand outlet is arranged at the front end of the small arm.

[0025] Further, the sand mixer and the feeding valve are controlled by a controller; after the model with the identification label completes the operation of the sand box, the model is transferred to a jolt table by a model conveying device; a radio frequency identification reader identifies the label information on the model and feeds back to the controller; the controller controls the sand mixer to open the automatic track sand filling according to the corresponding model information in a database; the controller controls the feeding valve to adjust the sand feeding ratio in real time, realizes the switching of back sand and face sand, and realizes the variable sand feeding for the model; during the sand filling process, the jolt table is started in time according to the established control logic, the exciting force, the exciting frequency and the vibration time required by the corresponding sand mold are provided according to the model label information, and the molding process is completed.

[0026] Further, the liquid material feeding device comprises a binder feeding subsystem and a curing agent feeding subsystem controlled by the controller.

[0027] The binder feeding subsystem comprises a binder container, a binder filter, a binder conveying pump, a binder flow meter and a binder pneumatic tee joint.

[0028] The binder container is connected to one end of the binder filter through a pipeline, the other end of the binder filter is connected to one end of the binder conveying pump through a pipeline, and the other end of the binder conveying pump is connected to a first end of the binder pneumatic tee joint through a pipeline; a binder flow meter is arranged between the binder conveying pump and the binder pneumatic tee joint; a second end of the binder pneumatic tee joint is connected to the binder container through a pipeline, and a third end of the binder pneumatic tee joint is connected to the small arm of the sand mixer through a pipeline; the controller is connected to the binder conveying pump through a first frequency converter; and the binder flow meter is electrically connected to the controller.

[0029] The curing agent feeding subsystem comprises a curing agent container, a curing agent filter, a curing agent conveying pump, a curing agent flow meter and a curing agent pneumatic tee joint.

[0030] The solidifying agent container is connected with one end of a solidifying agent filter through a pipeline, the other end of the solidifying agent filter is connected with one end of a solidifying agent conveying pump through a pipeline, the other end of the solidifying agent conveying pump is connected with a first end of a solidifying agent pneumatic tee joint through a pipeline; a solidifying agent flow meter is arranged between the solidifying agent conveying pump and the solidifying agent pneumatic tee joint; a second end of the solidifying agent pneumatic tee joint is connected with the solidifying agent container through a pipeline, and a third end is connected with a sand mixer arm in the sand mixer through a pipeline; the controller is connected with the solidifying agent conveying pump through a second frequency converter; and the solidifying agent flow meter is electrically connected with the controller.

[0031] Further, the solidifying agent supply subsystem is configured with two sets, which are respectively used for supplying two kinds of solidifying agents with different solidifying rates.

[0032] After the sand mixer is started, the controller automatically calculates the required theoretical flow of the binder and the solidifying agent according to the control program according to the environmental temperature, humidity, sand inlet temperature and sand inlet weight, and controls the rotation speed of the binder conveying pump and the solidifying agent conveying pump correspondingly, so that the calculated theoretical flow is output; each binder flow meter and solidifying agent flow meter feeds back the corresponding flow information to the controller in real time, and the controller continuously corrects the rotation speed of the binder conveying pump and the solidifying agent conveying pump, so that the actual flow of the binder and the solidifying agent is within the required flow tolerance range.

[0033] Further, the vibrating table comprises a vibrating base, an air spring, a vibrating frame, a transmission channel and a vibrating motor.

[0034] The air spring is arranged on the vibrating base, and the vibrating frame is connected to the air spring; the vibrating frame is located in the middle region of the vibrating base, and the transmission channel is arranged in the two side regions of the vibrating base; and the vibrating motor is installed on the vibrating frame.

[0035] The technical effect of the present application is that the sand mixing, sand filling and vibrating work can be automatically completed according to the model information, the sand supply ratio can be adjusted in real time, the back sand and the surface sand can be switched, and variable sand supply for the model can be realized; the liquid material supply is accurate, the amount of binder / solidifying agent can be saved, and the cost is reduced; the excitation force, excitation frequency and corresponding vibration duration required by the corresponding sand mold can be provided according to the model RFID tag information, and the optimal compactness of the sand mold is provided. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a schematic diagram of the intelligent sand mixer system in the embodiment of the present application.

[0037] Figure 2 It is a schematic diagram of the sand storage and feed valve structure in the embodiment of the present application.

[0038] Figure 3 It is a schematic diagram of the sand mixing proportional valve structure in the embodiment of the present application.

[0039] Figure 4This is a schematic diagram of the liquid supply device in an embodiment of the present invention.

[0040] Figure 5A and 5B This is a schematic diagram of the vibration table in an embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] This invention provides an intelligent sand mixer system, such as... Figure 1 As shown, it includes: 1. Sand mixer, 2. Feed valve, 3. Sand silo, 4. Liquid material supply device, 5. Vibrating table; it may also include: 6. Mold, 7. Sand box, 8. Mold conveying device;

[0043] The sand silo 3 is used to store molding sand and supplies it to the sand mixer 1 through the feeding valve 2; the sand silo 3 is located above the sand mixer 1.

[0044] The feeding valve 2 is used to control the type and amount of molding sand supplied; the feeding valve 2 is located between the sand silo 3 and the sand mixer 1.

[0045] The liquid supply device 4 is used to store binder and curing agent and supply them to the sand mixer;

[0046] The sand mixer 1 is used to convey molding sand and mix the molding sand with binder and curing agent before outputting a mixture for forming sand mold 9;

[0047] The vibratory table 5 is located below the sand outlet of the sand mixer 1. It is used to support the model 6 and the sand box 7 fitted onto the model 6, and to compact the mixture in the sand box 7 through vibration.

[0048] The sand box 7 is fitted onto the model 6 to prevent the mixture from falling off the side of the model during sand filling. The model conveying device 8 is set on both sides of the compaction table 5. The model conveying device 8 on one side is used to carry the model 6 and the empty sand box 7 fitted onto the model 6 and convey them to the compaction table 5. The model conveying device 8 on the other side is used to output the model 6 and the sand box 7 fitted onto the model 6 after sand filling. The sand box 7 after sand filling is filled with the mixture. After compaction and solidification, it can form a sand mold 9. The model conveying device 8 can be a motorized roller conveyor.

[0049] In a preferred embodiment, model 6 is affixed with an identification tag, such as an RFID tag;

[0050] After sand mold 9 is removed and separated from model 6, it can be used for casting.

[0051] In the production of sand mold 9, in order to save cost as much as possible, the sand is divided into back sand and face sand, the area of sand mold 9 which does not need to contact with the casting can be filled with the mixture containing back sand because the back sand is cheap; the area of sand mold 9 which needs to contact with the casting, that is, the area close to the molding surface of the sand mold is filled with the mixture containing face sand, the face sand is expensive but the surface quality of the sand mold 9 formed is good;

[0052] As shown in Figure 2 , the sand storage 3 is divided into at least two sand compartments 301 for storing different types of sand; in a specific embodiment, the sand storage 3 is divided into a first face sand compartment 301A, a second face sand compartment 301B and a back sand compartment 301C for storing face sand A, face sand B and back sand C respectively; the back sand compartment 301C is located between the two face sand compartments 301A and 301B;

[0053] As shown in Figure 2 and Figure 3 , the feeding valve 2 includes a plug valve 201, a buffer sand hopper 202, a sand mixing proportioning valve 203 and a sand discharging hopper 204; the buffer sand hopper 202 is arranged below the sand storage 3, and the buffer sand hopper 202 is divided into a plurality of buffer compartments 2021 corresponding to the sand compartments 301 respectively; the plug valve 201 is arranged in each buffer compartment 2021; the sand mixing proportioning valve 203 is connected below the buffer sand hopper 202; each buffer compartment of the buffer sand hopper 202 corresponds to a sand type channel in the sand mixing proportioning valve 203; the sand discharging hopper 204 is connected below the sand mixing proportioning valve 203; the sand discharging hopper 204 is connected to the sand inlet of the sand mixing machine 1; the sand inlet of the sand mixing machine 1 is provided with a sand inlet cone 101;

[0054] The plug valve 201 can be a manual plug valve or a pneumatic plug valve, which can cut off the supply of sand when closed, facilitating the maintenance personnel to assemble or overhaul the sand mixing proportioning valve 203 and the sand mixing machine 1; in the embodiment, the pneumatic plug valve is arranged in the buffer compartment corresponding to the back sand compartment 301C,

[0055] As shown in Figure 3 , the sand mixing proportioning valve 203 includes a flow orifice plate 2031; the flow orifice plate 2031 is provided with flow-adjustable sand passing holes 2032 corresponding to each buffer compartment 2021 and sand compartment 301; a pneumatic valve plate 2033 is arranged below each sand passing hole 2032 to realize the opening and closing of the sand passing hole; each pneumatic valve plate 2033 is driven by a corresponding flow adjusting cylinder 2037;

[0056] A quantitative orifice plate 2034 is arranged in the sand passing hole 2032 corresponding to the back sand compartment 301C, since the supply amount of back sand only needs to be coarsely adjusted, which can be achieved by replacing the quantitative orifice plate 2034 with different diameters;

[0057] A flow plug 2035 corresponding to the sand passing hole 2032 of the face sand grid 301A, 301B is arranged below the sand passing hole 2032, and the flow plug 2035 is connected to an adjusting screw assembly 2036; the flow plug 2035 is adjusted by the adjusting screw assembly 2036, so that the flow of the sand passing hole 2032 corresponding to the face sand grid can be finely adjusted to meet the fine adjustment requirement of the sand supply amount of the face sand; the flow plug 2035 is located above the corresponding pneumatic valve plate 2033;

[0058] In a specific embodiment, one sand passing hole corresponding to the back sand grid is located between two groups of sand passing holes corresponding to the face sand grid; each group of sand passing holes corresponding to the face sand grid includes two sand passing holes, and the two sand passing holes are respectively controlled by the corresponding pneumatic valve plate 2033; the two pneumatic valve plates of the group of sand passing holes are respectively driven by the flow adjusting cylinder 2037 arranged on both sides of the flow hole plate 2031; each group of sand passing holes corresponding to the face sand grid is configured as two, which can finely adjust the sand supply amount of the face sand in a large range;

[0059] As shown in Figure 1 , the sand mixer 1 includes a sand mixer base 102, a sand mixer large arm 103, and a sand mixer small arm 104;

[0060] The sand mixer large arm 103 and the sand mixer small arm 104 are both in a cylindrical structure, and a sand mold conveying mechanism, such as a conveying belt, is arranged in the cylindrical structure; the rear end of the sand mixer large arm 103 is provided with a sand inlet, and a sand inlet cone 101 can be arranged at the sand inlet; the rear end of the sand mixer large arm 103 is connected to the sand mixer base 102, and the sand mixer base 102 is provided with a large arm rotation driving mechanism, which can be used to drive the sand mixer large arm 103 to rotate within a range of 120 degrees; the front side of the sand mixer base 102 is further provided with a large arm pitching driving mechanism 105, which can be used to drive the sand mixer large arm 103 to pitch; the front end of the sand mixer large arm 103 is connected to the rear end of the sand mixer small arm 104; the front end of the sand mixer large arm 103 is provided with a small arm rotation driving mechanism, which can drive the sand mixer small arm 104 to rotate within a range of 260 degrees; the sand mixer small arm 104 is further provided with a stirring mechanism, such as a stirring cutter assembly, which can mix the sand mold (back sand or face sand) with the binder and the curing agent and then output the mixture; the front end of the sand mixer small arm 104 is provided with a sand outlet at the lower part; in some embodiments, the large arm rotation driving mechanism and the small arm rotation driving mechanism both adopt a motor rotation driving mechanism; the large arm pitching driving mechanism 105 adopts an oil cylinder with variable stroke;

[0061] The sand mixing machine 1, the sand mixing proportional valve 203 in the sand supply valve 2, and the pneumatic plug valve in some embodiments are controlled by the controller; in this embodiment, a PLC controller is used; when the model 6 with an RFID tag completes the action of covering the sand box 7, it is transferred to the jolting table 5 by the model conveying device 8; the wireless radio frequency reader identifies the label information on the model 6 and feeds back to the controller; the controller controls the sand mixing machine 1 to open the automatic trajectory sand filling according to the corresponding model information in the database; the controller controls the sand supply valve 2 to adjust the sand supply ratio in real time, realizes the switching of back sand and face sand, and can realize variable sand supply to the model; during the sand filling process, according to the established control logic, the jolting table 5 is started in time (the starting time of various models may be different), the excitation force, excitation frequency and vibration time required for the corresponding sand mold are provided according to the model label information, and the molding process is completed.

[0062] As shown in Figure 4 , the liquid material supply device 4 includes a binder supply subsystem 41 and a curing agent supply subsystem 42 controlled by the controller;

[0063] The intelligent sand mixing machine system is configured with an electric control cabinet 10, and the PLC controller is arranged in the electric control cabinet 10;

[0064] The binder supply subsystem 41 includes a binder container 411, a binder filter 412, a binder conveying pump 413, a binder flowmeter 414, and a binder pneumatic tee 415;

[0065] The binder container 411 is connected to one end of the binder filter 412 through a pipeline, the other end of the binder filter 412 is connected to one end of the binder conveying pump 413 through a pipeline, and the other end of the binder conveying pump 413 is connected to the first end of the binder pneumatic tee 415 through a pipeline; the binder flowmeter 414 is arranged between the binder conveying pump 413 and the binder pneumatic tee 415; the second end of the binder pneumatic tee 415 is connected to the binder container 411 through a pipeline, and the third end is connected to the sand mixing machine arm 104 in the sand mixing machine 1 through a pipeline; the controller is connected to the binder conveying pump 413 through a first frequency converter 416; the binder flowmeter 414 is electrically connected to the controller;

[0066] The curing agent supply subsystem 42 includes a curing agent container 421, a curing agent filter 422, a curing agent conveying pump 423, a curing agent flowmeter 424, and a curing agent pneumatic tee 425;

[0067] The curing agent container 421 is connected to one end of the curing agent filter 422 through a pipeline, the other end of the curing agent filter 422 is connected to one end of the curing agent delivery pump 423 through a pipeline, the other end of the curing agent delivery pump 423 is connected to the first end of the curing agent pneumatic tee 425 through a pipeline; a curing agent flow meter 424 is arranged between the curing agent delivery pump 423 and the curing agent pneumatic tee 425; the second end of the curing agent pneumatic tee 425 is connected to the curing agent container 421 through a pipeline, and the third end is connected to the mixing arm 104 of the sand mixer 1 through a pipeline; the controller is connected to the curing agent delivery pump 423 through a second frequency converter 426; and the curing agent flow meter 424 is electrically connected to the controller.

[0068] In an optimized embodiment, the curing agent supply subsystem 42 is configured with two sets, which are respectively used to supply two kinds of curing agents with different curing rates; in summer, the proportion of the fast curing agent in the curing agent is reduced, the proportion of the slow curing agent is increased, and even all the curing agent is the slow curing agent; in winter, the proportion of the fast curing agent in the curing agent is increased, and the proportion of the slow curing agent is reduced.

[0069] The functions of the binder pneumatic tee 415 and the curing agent pneumatic tee 425 are to make the binder in the pipeline between the binder container 411 and the binder pneumatic tee 415 and the curing agent in the pipeline between the curing agent container 421 and the curing agent pneumatic tee 425 flow back to the corresponding containers when the binder or the curing agent is not needed to be supplied.

[0070] The intelligent sand mixer system is configured with an environment temperature and humidity sensor and an incoming sand temperature sensor; the incoming sand temperature sensor is usually arranged at the sand outlet at the lower part of the sand bin; a sand weight sensor is arranged in the sand mixer large arm; after the sand mixer is started, according to the environment temperature, humidity, incoming sand temperature and incoming sand weight, the controller automatically calculates the required theoretical flow of the binder and the curing agent according to the control program, and correspondingly controls the rotating speed of the binder delivery pump and the curing agent delivery pump, so that the calculated theoretical flow is output; each binder flow meter and curing agent flow meter feeds back the corresponding flow information to the controller in real time, the rotating speed of the binder delivery pump and the curing agent delivery pump is continuously corrected by the controller, so that the actual flow of the binder and the curing agent is within the required flow tolerance range, and the accurate control of the PID supply flow of the liquid material is realized.

[0071] As shown in Figure 5A and Figure 5B , the jolter 5 comprises a jolter base 501, an air spring 502, a jolter frame 503, a conveying track 504 and a vibration motor 505;

[0072] The air spring 502 is arranged on the jolter base 501, and the jolter frame 503 is connected to the air spring 502; the jolter frame 503 is located in the middle region of the jolter base 501, and the conveying tracks 504 are arranged in the two side regions of the jolter base 501; the vibration motor 505 is installed on the jolter frame 503; the conveying tracks 504 can adopt motorized roller tracks;

[0073] The vibration motor 505 includes two groups of motors 505A, 505B with different power sizes; when the model 6 after the sleeve box enters the sand filling and vibrating station, the wireless radio frequency reader identifies the label information on the model 6 and feeds back to the controller; the controller starts the larger power motor 505A or the smaller power motor 505B corresponding to the model 6 according to the existing model parameters, and performs opposite synchronous rotation; by configuring two groups of vibration motors with different sizes, the exciting force and the exciting frequency during vibration can be adjusted according to the model size and weight to meet the vibrating and compacting requirements of different workpiece models; the air spring not only provides a carrier for the vibration frame 503, but also can realize the lifting of the vibration frame 503 by adjusting the air pressure to supply the model 6 and the sand box 7 sleeved on the model 6.

[0074] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An intelligent sand mixing machine system, characterized in that, include: Sand mixer (1), feeding valve (2), sand silo (3), liquid material supply device (4), vibrating table (5); The sand silo (3) is used to store molding sand and supply it to the sand mixer (1) through the feeding valve (2); the sand silo (3) is located above the sand mixer (1); The feeding valve (2) is used to control the type and amount of molding sand supplied; the feeding valve (2) is located between the sand silo (3) and the sand mixer (1); The liquid supply device (4) is used to store the binder and curing agent and supply them to the sand mixer; The sand mixer (1) is used to transport molding sand and mix the molding sand with binder and curing agent before outputting a mixture for forming sand mold (9); The vibrating table (5) is arranged below the sand outlet of the sand mixer (1) to support the model (6) and the sand box (7) fitted on the model (6), and to compact the mixture in the sand box (7) by vibration. The system also includes a model (6), a sandbox (7), and a model conveying device (8); The sand box (7) is fitted onto the model (6); the model conveying device (8) is set on both sides of the vibrating table (5). The model conveying device (8) on one side is used to carry the model (6) and the empty sand box (7) fitted onto the model (6) and convey it to the vibrating table (5). The model conveying device (8) on the other side is used to output the model (6) and the sand box (7) fitted onto the model (6) after it has been filled with sand. The sand storage (3) is divided into at least two sand compartments (301) for storing different types of molding sand; The feeding valve (2) includes a slide gate valve (201), a buffer sand hopper (202), a sand mixing proportion valve (203), and a discharge sand hopper (204); the buffer sand hopper (202) is located below the sand silo (3), and the buffer sand hopper (202) is divided into several buffer compartments (2021) that correspond one-to-one with each sand compartment (301); a slide gate valve (201) is installed in each buffer compartment (2021); the sand mixing proportion valve (203) is connected to the bottom of the buffer sand hopper (202); each buffer compartment of the buffer sand hopper (202) corresponds one-to-one with each molding sand channel in the sand mixing proportion valve (203); the discharge sand hopper (204) is connected to the bottom of the sand mixing proportion valve (203); the discharge sand hopper (204) is connected to the sand inlet of the sand mixer (1); The sand mixing proportioning valve (203) includes a flow orifice plate (2031); the flow orifice plate (2031) is provided with sand passage holes (2032) that are corresponding to each buffer cell (2021) and sand cell (301) and can adjust the flow rate; a pneumatic valve plate (2033) is provided below each sand passage hole (2032) to realize the opening and closing of the sand passage hole; each pneumatic valve plate (2033) is driven by a corresponding flow regulating cylinder (2037); The sand reservoir (3) is divided into at least a face sand grid and a back sand grid; A metering orifice plate (2034) is installed in the sand passage hole (2032) corresponding to the back sand grid; A flow meter (2035) is installed below the sand passage hole (2032) corresponding to the sand grid, and the flow meter (2035) is connected to the adjusting screw assembly (2036); The sand mixing proportioning valve (203) in the feed valve (2) is controlled by the controller; The sand mixer (1) and the feeding valve (2) are controlled by the controller; after the model (6) with the label is completed and the sand box (7) is placed, it is transferred to the vibrating table (5) through the model conveying device (8); the radio frequency reader identifies the label information on the model (6) and feeds it back to the controller; the controller controls the sand mixer (1) to start automatic trajectory sand filling according to the corresponding model information in the database; the controller controls the feeding valve (2) to adjust the sand supply ratio in real time, realize the switching of back sand and face sand, and realize variable sand supply to the model; during the sand filling process, the vibrating table (5) is started to vibrate in time according to the established control logic, and the excitation force, excitation frequency and vibration duration required by the corresponding sand mold (9) are provided according to the model label information to complete the molding process.

2. The intelligent sand mixer system as described in claim 1, characterized in that, The sand reservoir (3) is divided into a first-face sand grid (301A), a second-face sand grid (301B), and a back sand grid (301C); the back sand grid (301C) is located in the middle of the two face sand grids (301A and 301B); On the flow orifice plate (2031), a sand passage hole corresponding to the back sand grid is located between two sets of sand passage holes corresponding to the front sand grid; each set of sand passage holes corresponding to the front sand grid includes two sand passage holes, which are controlled by their respective pneumatic valve plates (2033). The two pneumatic valve plates of this set of sand passage holes are driven by flow regulating cylinders (2037) set on both sides of the flow orifice plate (2031).

3. The intelligent sand mixer system as described in claim 1, characterized in that, The sand mixer (1) includes a sand mixer base (102), a sand mixer boom (103), and a sand mixer forearm (104); Both the main boom (103) and the secondary boom (104) of the sand mixer are cylindrical structures, in which a molding sand conveying mechanism is provided; a sand inlet is provided at the rear end of the main boom (103); the rear end of the main boom (103) is connected to the base (102) of the sand mixer, and a main boom rotation drive mechanism is provided in the base (102) of the sand mixer for driving the main boom (103) to rotate; a main boom pitch drive mechanism (105) is also provided on the front side of the base (102) of the sand mixer for driving the main boom (103) to pitch; the front end of the main boom (103) is connected to the rear end of the secondary boom (104) of the sand mixer; a secondary boom rotation drive mechanism is provided at the front end of the main boom (103) for driving the secondary boom (104) to rotate; a stirring mechanism is also provided in the secondary boom (104); a sand outlet is provided at the lower part of the front end of the secondary boom (104).

4. The intelligent sand mixer system as described in claim 1, characterized in that, The liquid supply device (4) includes an adhesive supply subsystem (41) and a curing agent supply subsystem (42) controlled by a controller; The adhesive supply subsystem (41) includes an adhesive container (411), an adhesive filter (412), an adhesive delivery pump (413), an adhesive flow meter (414), and an adhesive pneumatic tee (415); The adhesive container (411) is connected to one end of the adhesive filter (412) via a pipeline. The other end of the adhesive filter (412) is connected to one end of the adhesive delivery pump (413) via a pipeline. The other end of the adhesive delivery pump (413) is connected to the first end of the adhesive pneumatic tee (415) via a pipeline. An adhesive flow meter (414) is installed in the pipeline between the adhesive delivery pump (413) and the adhesive pneumatic tee (415). The second end of the adhesive pneumatic tee (415) is connected to the adhesive container (411) via a pipeline, and the third end is connected to the small arm (104) of the sand mixer (1) via a pipeline. The controller is connected to the adhesive delivery pump (413) via the first frequency converter (416). The adhesive flow meter (414) is electrically connected to the controller. The curing agent supply subsystem (42) includes a curing agent container (421), a curing agent filter (422), a curing agent delivery pump (423), a curing agent flow meter (424), and a curing agent pneumatic tee (425); The curing agent container (421) is connected to one end of the curing agent filter (422) through a pipeline. The other end of the curing agent filter (422) is connected to one end of the curing agent delivery pump (423) through a pipeline. The other end of the curing agent delivery pump (423) is connected to the first end of the curing agent pneumatic tee (425) through a pipeline. A curing agent flow meter (424) is installed in the pipeline between the curing agent delivery pump (423) and the curing agent pneumatic tee (425). The second end of the curing agent pneumatic tee (425) is connected to the curing agent container (421) through a pipeline, and the third end is connected to the small arm (104) of the sand mixer (1) through a pipeline. The controller is connected to the curing agent delivery pump (423) through the second frequency converter (426). The curing agent flow meter (424) is electrically connected to the controller.

5. The intelligent sand mixer system as described in claim 4, characterized in that, The curing agent supply subsystem (42) is equipped with two sets, which are used to supply two curing agents with different curing rates respectively; After the sand mixer is started, the controller automatically calculates the theoretical flow rate required for the binder and curing agent according to the control program based on the ambient temperature, humidity, sand inlet temperature and sand inlet weight, and controls the speed of the binder delivery pump and curing agent delivery pump accordingly, so that they output the calculated theoretical flow rate. Each adhesive flow meter and curing agent flow meter feeds back the corresponding flow information to the controller in real time. The controller continuously corrects the speed of the adhesive delivery pump and the curing agent delivery pump so that the actual flow rate of the adhesive and curing agent is within the required flow tolerance range.

6. The intelligent sand mixer system as described in claim 1, characterized in that, The vibration table (5) includes a vibration base (501), an air spring (502), a vibration frame (503), a transmission channel (504), and a vibration motor (505); An air spring (502) is installed on the vibration base (501), and a vibration frame (503) is connected to the air spring (502); the vibration frame (503) is located in the middle area of ​​the vibration base (501), and transmission channels (504) are set on both sides of the vibration base (501); a vibration motor (505) is installed on the vibration frame (503).

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