CN114472799A

CN114472799A - Roller mill for casting production

Info

Publication number: CN114472799A
Application number: CN202210124468.6A
Authority: CN
Inventors: 王雪冰; 王磊
Original assignee: Hefei University
Current assignee: Hefei University
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-05-13

Abstract

The invention discloses a sand mixer for casting production, which comprises a sand mixing tank, wherein a rotating shaft driven by a motor penetrates through the middle part of the sand mixing tank, a blocking block is coaxially and rotatably connected to the rotating shaft, the blocking block is a conical block and is fixedly connected with the inner bottom of the sand mixing tank, the blocking block is rotatably connected with the sand mixing tank through a bearing, and the top end of the rotating shaft is fixedly connected with two connecting rods. In the invention, when the rotating shaft rotates, the grinding wheel and the shovel plate can be driven to rotate along with the rotating shaft, the guide plate on the grinding wheel can lift materials in the rotating process of the grinding wheel, meanwhile, the materials on two sides can move to the middle position of the grinding wheel along with the guide plate, meanwhile, the materials can not be accumulated on two sides of the rotating shaft through the blocking block, the material moderating efficiency is improved, the materials at the bottom of the sand mixing tank can be overturned above the shovel plate, and the material mixing efficiency of the device is further improved.

Description

Roller mill for casting production

Technical Field

The invention relates to the technical field of sand mixing devices, in particular to a sand mixer for casting production.

Background

The sand mixer is an ideal equipment for producing raw materials such as baking-free bricks, sand-lime bricks and the like, and can uniformly mix all components in the molding sand and effectively coat the adhesive on the surface of the sand grains.

In practical situations, a roller mill is a kind of sand mill, and this kind of sand mill is generally equipped with a roller with a certain weight, and when the roller works, it can revolve around the main shaft of the sand mill and simultaneously rotate with the bottom of the sand mixing tank, and the roller mill rolls and grinds the molding sand while rolling, so that the molding sand particles are covered with a layer of adhesive film, thereby completing the mixing of the materials.

However, the following problems occur when the existing sand mixer is used: the existing sand mixer only depends on the grinding wheel and the baffle to process materials, wherein the baffle can enable the materials on two sides to be gradually overturned to the middle, so that the sand mixing effect of the sand mixer is improved, but in the working process, a part of materials are still piled up and cannot be overturned to the middle position, the mixing of the materials is further influenced, and the mixing efficiency of the sand mixer is reduced.

We have therefore proposed a sand mixer for foundry production to solve the above problems.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, embodiments of the present invention provide a sand mixer for casting production to solve the problems set forth in the above-mentioned background art.

In order to achieve the purpose, the invention provides the following technical scheme: a sand mixer for casting production comprises a sand mixing tank, wherein a rotating shaft driven by a motor penetrates through the middle of the sand mixing tank, a blocking block is coaxially and rotatably connected to the rotating shaft, the blocking block is a conical block and is fixedly connected with the inner bottom of the sand mixing tank, and the blocking block is rotatably connected with the sand mixing tank through a bearing;

the top end of the rotating shaft is fixedly connected with two connecting rods, one ends of the two connecting rods are respectively and rotatably connected with grinding wheels which are contacted with the inner bottom of the sand mixing tank, a plurality of shovel grooves are respectively arranged on the two grinding wheels, a guide plate is respectively and fixedly connected to the inner bottom of the shovel grooves, bending rods are respectively and rotatably connected to the two grinding wheels, and one ends of the two bending rods are respectively and fixedly connected with pushing rings which are contacted with the side wall of the sand mixing tank;

the top end of the rotating shaft is fixedly connected with two supporting rods, one end of each supporting rod is connected with a rotating drum, the two rotating drums are fixedly connected with shovel plates, and a plurality of discharge holes are formed in the two shovel plates.

In this device, in the pivot pivoted in-process, can drive the runner and shovel board rotates thereupon, wherein the guide plate on the runner can be at runner pivoted in-process, raise the material, the intermediate position of runner is removed thereupon to the material that also can make both sides simultaneously, it can not pile up the both sides of pivot to block the piece simultaneously, the efficiency that mitigatees of material has been improved, and the shovel board can make the material of fracturing blender tank bottom overturn above thereupon, further improvement the efficiency of device mixing material.

In a preferred embodiment, a first sealed bearing is rotatably connected to the rotating shaft, the first sealed bearing is connected to an external air source, and the first sealed bearing is arranged in communication with the rotating shaft, wherein the first sealed bearing enables the external air source to be conveyed into the rotating shaft.

The pivot is connected with the splitter ring through second sealed bearing rotation, second sealed bearing is linked together the setting with pivot and splitter ring respectively, the end fixedly connected with a plurality of gas heads of giving vent to anger of splitter ring.

The stop block is equipped with a plurality of guiding gutters, and a plurality of guiding gutters all incline and set up down, and is a plurality of the head of giving vent to anger is in the top of a plurality of guiding gutters respectively, and wherein the guiding gutters can avoid the material to pile up on stopping the block.

Wherein, first sealed bearing can make during external air supply carries the pivot, and under second sealed bearing's assistance, can make gas spout in following the play gas head on the splitter ring, just so can make gas spout to the stopper to avoided the material to pile up on the stopper, and the guiding gutter can prolong the direction of blowing of air current, further can make the material enter into the intermediate position of grinding wheel from one side.

In a preferred embodiment, a set of symmetrical first bar-shaped openings is arranged on the side walls of the plurality of shovel grooves, a plurality of symmetrical shunt pipes are arranged in the grinding wheel, a plurality of air nozzles are fixedly connected to the shunt pipes, the output ends of the air nozzles extend into the first bar-shaped openings of the plurality of groups respectively, and air inlet pipes are fixedly connected to the shunt pipes.

Particularly, the air nozzles can be uniformly distributed in the first strip-shaped openings, so that the materials can be blown out of the shovel groove, and the materials are further prevented from being accumulated in the shovel groove

Many equal fixedly connected with solenoid valve in the intake pipe, two the connecting rod is the cavity form, and the both ends of two connecting rods are linked together the setting with pivot and two rollers respectively, and wherein the solenoid valve is prior art to solenoid valve oil single chip microcomputer control is regularly started, thereby can make during gaseous transport shunt tubes, further avoid the material can't enter into the shovel groove.

Wherein, when the material enters into the shovel groove, when the shovel groove is close to the fracturing blender jar bottom, corresponding solenoid valve is in the closed condition this moment, and when the bottom of the fracturing blender jar was kept away from to the shovel groove, the solenoid valve was in the open mode, and further can avoid the material to pile up in the shovel groove, also can make the material blow the front portion of grinding roller simultaneously, further improvement the mixed effect of device.

In a preferred embodiment, two of the support rods are fixedly connected with a vertical rod, one end of each of the two vertical rods is fixedly connected with a servo motor, a driving shaft of the servo motor is fixedly connected with a rotating shaft, and one end of the rotating shaft penetrates through the side wall of the support rod and is connected with the rotary drum.

The vertical rod has the function of supporting the servo motor, the servo motor can enable the rotary drum to rotate along with the rotary shaft under the assistance of the rotary shaft, and further the angle of the shovel plate can be changed along with the rotary shaft, so that materials can be lifted, the materials can be overturned more fully, and the mixing effect of the device is improved indirectly.

In a preferred embodiment, the shovel plate is provided with a plurality of second strip-shaped openings, a plurality of sets of symmetrical bearings are fixedly connected to the inner side walls of the second strip-shaped openings, the two bearings are a set, a plurality of rotating rods are arranged between the bearings, and a plurality of blades are fixedly connected to the rotating rods.

Wherein under the assistance of bull stick and bearing, receive the influence of weight as the flabellum simultaneously, can make the upset of material once more, further avoided the material directly to drop at original material.

In a preferred embodiment, the plurality of blades are all arc blades, the cross sections of the plurality of flow deflectors are triangular, the high middle part of each flow deflector is located in the middle of the shovel groove, and the low two sides of each flow deflector are located on the two sides of the shovel groove respectively.

Wherein the flabellum can bear more materials, and further can make the flabellum normally rotate, and the guide plate can make the material of running roller both sides remove to the centre to avoid the material to pile up the both sides of running roller.

The invention has the technical effects and advantages that:

1. in this device, the staff can carry gas through outside air pump in first sealed bearing, just so can make the pivot be full of gas, and thus can make gas spout from giving vent to anger the head, just so can make the material on the stop block blown to the centre of mixing the sand jar, the stop ring is the toper simultaneously, further avoided the material to pile up on the stop ring, simultaneously under gaseous assistance, can make the material by the intermediate position of propelling movement to the grinding wheel, thereby avoided the material to pile up the one side at the grinding wheel, the mixing effect of device has been improved.

2. In this device, the pivot rotates thereupon under the drive of motor, further enough make the runner take place the rotation thereupon, thereby just can make the material obtain mixing, simultaneously when runner pivoted in-process, just can make the material enter into the shovel groove thereupon, and the guide plate can make the material of both sides move the mid portion of runner thereupon, just so can make the material of bottom be raised thereupon, simultaneously at runner pivoted in-process, can make the thrust ring rotate thereupon, thereby avoided the material to pile up the side at the muddy sand jar, just so can make the material be promoted the intermediate material of runner thereupon, thereby can make the material obtain the effect of rolling and mixing, further improvement the mixed effect of device.

3. In this device, when servo motor work, just so can make the shovel board rotate thereupon, when the shovel board pivoted, just can make the material of mixing sand tank bottom raised, and discharge opening and flabellum can make the material can be more abundant contact with other materials, the indirect practicality that has improved the device.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partial structural schematic diagram of the present invention.

Fig. 3 is a schematic bottom view of the connection structure of fig. 2.

Fig. 4 is a schematic view of a partial connection structure according to the present invention.

Fig. 5 is a schematic sectional connection structure of fig. 4.

Fig. 6 is a schematic view of the connection structure of the grinding wheel and the connecting rod.

Fig. 7 is a schematic view of the connection structure of the grinding wheel and the pushing ring.

Fig. 8 is a side view of the connection structure of fig. 6.

FIG. 9 is a schematic view of a partial internal connection of the grinding wheel;

fig. 10 is a schematic cross-sectional view of a baffle;

FIG. 11 is a schematic view of the connection of the blade and the support bar;

fig. 12 is a partially exploded view of fig. 11.

The reference signs are: 1 sand mixing tank, 2 rotating shafts, 3 stop blocks, 4 connecting rods, 5 grinding wheels, 6 shovel grooves, 7 guide plates, 8 bending rods, 9 pushing rings, 10 supporting rods, 11 rotating cylinders, 12 shovel plates, 13 discharge holes, 14 first sealing bearings, 15 second sealing bearings, 16 shunt rings, 17 gas outlet heads, 18 guide grooves, 19 first strip-shaped openings, 20 shunt tubes, 21 gas jet heads, 22 gas inlet pipes, 23 vertical rods, 24 servo motors, 25 second strip-shaped openings, 26 bearings, 27 rotating rods and 28 fan blades.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-12, a sand mixer for casting production comprises a sand mixer 1, a rotating shaft 2 driven by a motor is arranged in the middle of the sand mixer 1, wherein, a reduction gearbox is arranged on one side of the motor to satisfy the normal rotation of the rotating shaft 2, and the motor and the reduction gearbox are part of the sand mixer, which is the prior art, but not excessive, a blocking block 3 is coaxially and rotatably connected to the rotating shaft 2, the blocking block 3 is a conical block, the blocking block 3 is fixedly connected to the inner bottom of the sand mixer 1, the blocking block 3 is rotatably connected to the sand mixer 1 through a bearing, wherein the blocking block 3 is inclined to prevent the material from being accumulated on the blocking block 3, and the material around the blocking block 3 can be rolled and mixed because the side wall of a rolling wheel 5 is close to the blocking block 3, and the blocking block 3 cannot rotate under the assistance of the bearing and the sand mixer 1, further enabling the materials to be normally positioned at the bottom of the sand mixing tank 1.

The rotating shaft 2 is rotatably connected with a first sealing bearing 14, the first sealing bearing 14 is connected with an external air source, wherein, the external air source is an air pump, the air pump is connected with an air pipe, the air pipe is connected with the first sealing bearing 14, further, the external air source can be conveyed into the first sealing bearing, the first sealing bearing 14 is communicated with the rotating shaft 2, the rotating shaft 2 is provided with a through hole, thus, the air entering the first sealing bearing 14 can enter the rotating shaft 2 from the through hole, due to the self action of the first sealing bearing 14, the condition that the air is discharged from the first sealing bearing 14 is further avoided, the rotating shaft 2 is rotatably connected with a diverter ring 16 through a second sealing bearing 15, the second sealing bearing 15 is respectively communicated with the rotating shaft 2 and the diverter ring 16, wherein, one side of the rotating shaft 2 close to the second sealing bearing 15 is provided with an air outlet hole, therefore, gas in the rotating shaft 2 can enter the gas outlet hole, the gas outlet hole can further enter the second sealing bearing 15, the splitter ring 16 and the second sealing bearing 15 are both provided with openings, so that the gas can enter the splitter ring 16, the gas outlet end of the splitter ring 16 is fixedly connected with a plurality of gas outlet heads 17, the blocking block 3 is provided with a plurality of guide grooves 18, the guide grooves 18 are all inclined and arranged downwards, the gas outlet heads 17 are respectively arranged above the guide grooves 18, the gas outlet heads 17 are just positioned at the inclined top ends of the guide grooves 18, so that the gas can be blown to the guide grooves 18, the guide grooves 18 can limit the gas to a certain extent, the gas can be blown to the lower part of the grinding wheel 5, the guide effect of the blocking block 3 is further improved, and the mixing effect of the device is indirectly improved.

Two connecting rods 4 of top fixedly connected with of pivot 2, the one end of two connecting rods 4 rotates respectively to be connected with the runner 5 that bottom contacted in the sand mixing tank 1, wherein it is equipped with rolling bearing to pay close attention to the junction of connecting rod 4 and runner 5, thereby can make runner 5 normally rotate, just so can make runner 5 take place the revolution and the rotation, further can make the normal misce bene material of device, all be equipped with a plurality of shovel grooves 6 on two runner 5, wherein pay close attention to, the shape in shovel groove 6 is the arc, and runner 5 is except the position in shovel groove 6, other positions can roll the material and mix, and shovel groove 6 can make the material by the arc, further the effect that can make the material mix is better.

Equal fixedly connected with guide plate 7 on a plurality of shovel groove 6's the interior bottom, polylith guide plate 7's cross-section is triangle-shaped, the high part in the middle of guide plate 7 is in the intermediate position of shovel groove 6, and the part that guide plate 7 both sides are low is in the both sides of shovel groove 6 respectively, wherein especially notice, guide plate 7 can make the material that enters into in shovel groove 6 remove to the centre gradually, just so can make the material of both sides shoveled the intermediate position to improved the effect of rolling wheel 5.

All rotate on two rollers 5 and be connected with bending rod 8, wherein bending rod 8 is equipped with the bearing with the junction of rollers 5, further can make promotion ring 9 normally remove, the equal fixedly connected with of one end of two bending rods 8 and the promotion ring 9 that mixes sand jar 1 lateral wall and contact, wherein the output front end of promotion ring 9 is the slope form, just so can make the material of mixing sand jar 1 side pushed the middle part that mixes sand jar 1 by promotion ring 9, thereby just can make the mixed effect of mixing sand jar 1 better.

A group of symmetrical first strip-shaped openings 19 are arranged on the side walls of the shovel grooves 6, wherein the first strip-shaped openings 19 are respectively positioned at two sides of the flow guide plate 7, further the material of the flow guide plate 7 can be blown into the sand mixing tank 1 by the air nozzle 21, the device can be operated for a period of time while the material is being discharged, so that the material is prevented from accumulating in the first strip-shaped opening 19, wherein, when the grinding wheel 5 is continuously rotated, the materials in the first strip-shaped opening 19 can be discharged by itself, thereby avoiding the material from being accumulated in the first strip-shaped opening 19, a plurality of symmetrical shunt pipes 20 are arranged in the grinding wheel 5, a plurality of air nozzles 21 are fixedly connected on the shunt pipes 20, of particular note, the aperture ratio of the showerhead 21 is small, and the aperture of the showerhead 21 is tapered, thereby avoiding the entry of the jet head 21 into the material and further avoiding the occurrence of blockage of the jet head 21.

The output of a plurality of air nozzles 21 extends to in the first bar opening 19 of multiunit respectively, equal fixedly connected with intake pipe 22 on the many shunt tubes 20, equal fixedly connected with solenoid valve on the many intake pipe 22, two connecting rods 4 are the cavity form, and the both ends of two connecting rods 4 are linked together the setting with pivot 2 and two bull wheels 5 respectively, wherein under the assistance of connecting rod 4, can make the gas in the pivot 2 carry the bull wheel 5 thereupon, and when the gas of bull wheel 5 constantly increases, can make during gas carries intake pipe 22, just so can make gas spout from air nozzle 21, thereby can make the material on the guide plate 7 obtain the clearance thereupon.

Two spinal branch vaulting poles 10 of top fixedly connected with of pivot 2, the one end of two spinal branch vaulting poles 10 all is connected with rotary drum 11, equal fixedly connected with shovel board 12 on two rotary drums 11, and wherein shovel board 12 is the arc, and further the material that can make the bottom is shoveled, just so can make the material of bottom obtain mixing thereupon and roll, and the junction of vaulting pole 10 and rotary drum 11 is equipped with the bearing, and further can make rotary drum 11 rotate thereupon.

All be equipped with a plurality of discharge openings 13 on two shovel boards 12, wherein discharge openings 13 can spill from discharge openings 13 when shovel board 12 shovels the material, further the removal that shovel board 12 drove the material has been avoided, thereby reach the processing mesh of material, equal fixedly connected with montant 23 on two spinal branch vaulting poles 10, the equal fixedly connected with servo motor 24 of one end of two montants 23, wherein servo motor 24 is prior art, not many statements here, fixedly connected with axis of rotation in servo motor 24's the drive shaft, and the one end of axis of rotation passes the lateral wall of bracing piece 10 and is connected with rotary drum 11, when servo motor 24 works, just can make rotary drum 11 rotate along with it, thereby just can make the angle of shovel board 12 change thereupon, just so can make the continuous raising of material, thereby improve the mixed effect of material.

Be equipped with a plurality of second bar openings 25 on shovel board 12, equal fixedly connected with multiunit symmetrical bearing 26 on a plurality of second bar openings 25's the inside wall, and two bearing 26 are a set of, be equipped with many bull sticks 27 between the multiunit bearing 26, equal fixedly connected with multi-disc flabellum 28 on many bull sticks 27, multi-disc flabellum 28 is the arc flabellum, wherein the arc flabellum of flabellum 28 can make the flabellum fully contact the material, just so can make the material enter into on the flabellum 28, and under bearing 26 and bull stick 27's assistance, thereby just can make the material discharge from second bar opening 25, further just can make the material obtain abundant mixture.

In the invention, when a worker needs to use the device, the worker can firstly convey gas into the first sealing bearing 14 through an external gas pump, so that the gas can be conveyed into the rotating shaft 2, and when the rotating shaft 2 is filled with the gas, the gas can be fully conveyed into the shunting ring 16, so that the gas can be sprayed out from the gas outlet head 17, and the material on the barrier block 3 can be blown to the middle of the sand mixing tank 1.

Meanwhile, the rotating shaft 2 rotates along with the rotating shaft under the driving of the motor, the grinding wheel 5 can rotate along with the rotating shaft 2 in the rotating process, so that the materials can be mixed, meanwhile, the materials can enter the shovel groove 6 along with the rotating shaft 5 in the rotating process, the guide plate 7 can enable the materials on two sides to move to the middle part of the grinding wheel 5 along with the rotating shaft, meanwhile, when the rotating shaft 2 is filled with gas, the gas can be conveyed into the grinding wheel 5, so that the gas can enter the gas inlet pipe 22 along with the rotating shaft, the gas nozzle 21 can generate gas, the materials in the guide plate and the shovel groove 6 can be blown to the interior of the sand mixing tank 1, and particularly, the materials cannot float in the air along with the rotating shaft due to certain weight, and the push ring 9 can rotate along with the rotating shaft 5 in the rotating process, further can make the material promoted the intermediate position of muddy sand jar 1 to avoided the material to pile up the side at muddy sand jar 1, especially noted simultaneously, promote ring 9 and contact with the lateral wall of muddy sand jar 1, thereby can reach the effect that better promotes the material.

Meanwhile, when the servo motor 24 works, the rotary drum 11 can be rotated, when the rotary drum 11 rotates, the rotary shaft can be rotated, so that the shovel plate 12 can rotate along with the rotary drum, when the shovel plate 12 rotates, the material at the bottom of the sand mixing tank 1 can be lifted, the material can be continuously overturned in the air along with the discharge hole 13 and the fan blade 28, the material can be fully contacted with other materials, and the material can be automatically reset when the shovel plate 12 moves to a certain angle, so that the material can be prevented from being shoveled to the outer side of the sand mixing tank 1.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a sand mixer is used in casting production, includes sand mixer (1), the middle part of sand mixer (1) is run through and is equipped with by motor drive's pivot (2), its characterized in that: the rotating shaft (2) is coaxially and rotatably connected with a blocking block (3), the blocking block (3) is a conical block, the blocking block (3) is fixedly connected with the inner bottom of the sand mixing tank (1), and the blocking block (3) is rotatably connected with the sand mixing tank (1) through a bearing;

the top end of the rotating shaft (2) is fixedly connected with two connecting rods (4), one ends of the two connecting rods (4) are respectively and rotatably connected with grinding wheels (5) which are contacted with the inner bottom of the sand mixing tank (1), a plurality of shovel grooves (6) are respectively arranged on the two grinding wheels (5), a guide plate (7) is respectively and fixedly connected to the inner bottom of each shovel groove (6), bending rods (8) are respectively and rotatably connected to the two grinding wheels (5), and one ends of the two bending rods (8) are respectively and fixedly connected with a pushing ring (9) which is contacted with the side wall of the sand mixing tank (1);

the top end of the rotating shaft (2) is fixedly connected with two supporting rods (10), one end of each supporting rod (10) is connected with a rotating drum (11), the other end of each rotating drum (11) is fixedly connected with a shovel plate (12), and the shovel plates (12) are provided with a plurality of discharge holes (13).

2. The sand mixer for casting production according to claim 1, wherein: the rotating shaft (2) is rotatably connected with a first sealing bearing (14), the first sealing bearing (14) is connected with an external air source, and the first sealing bearing (14) is communicated with the rotating shaft (2).

3. The sand mixer for casting production according to claim 2, wherein: the rotating shaft (2) is rotatably connected with a splitter ring (16) through a second sealing bearing (15), the second sealing bearing (15) is respectively communicated with the rotating shaft (2) and the splitter ring (16), and a plurality of air outlet heads (17) are fixedly connected with the air outlet end of the splitter ring (16).

4. A sand mixer for foundry production according to claim 3, characterized in that: the blocking block (3) is provided with a plurality of flow guide grooves (18), the flow guide grooves (18) are all arranged downwards in an inclined mode, and the air outlet heads (17) are located above the flow guide grooves (18) respectively.

5. The sand mixer for casting production according to claim 1, wherein: a plurality of be equipped with a set of symmetrical first bar opening (19) on the lateral wall of shovel groove (6), be equipped with a plurality of symmetrical shunt tubes (20) in running wheel (5), it is a plurality of equal fixedly connected with a plurality of jet heads (21) on shunt tubes (20), it is a plurality of the output of jet head (21) extends to in the first bar opening of multiunit (19) respectively, many equal fixedly connected with intake pipe (22) on shunt tubes (20).

6. A sand mixer for casting production according to claim 5, characterized in that: many equal fixedly connected with solenoid valve, two on intake pipe (22) connecting rod (4) are the cavity form, and the both ends of two connecting rod (4) are linked together the setting with pivot (2) and two rollers (5) respectively.

7. The sand mixer for casting production according to claim 1, wherein: two equal fixedly connected with montant (23), two on bracing piece (10) the equal fixedly connected with servo motor (24) of one end of montant (23), the fixedly connected with axis of rotation in the drive shaft of servo motor (24), and the one end of axis of rotation passes the lateral wall of bracing piece (10) and is connected with rotary drum (11).

8. The sand mixer for casting production according to claim 1, wherein: be equipped with on shovel board (12) and be equipped with a plurality of second bar opening (25), it is a plurality of equal fixedly connected with multiunit symmetrical bearing (26) on the inside wall of second bar opening (25), and two bearing (26) are a set of, multiunit be equipped with many bull stick (27) between bearing (26), many equal fixedly connected with multi-disc flabellum (28) on bull stick (27).

9. The sand mixer for casting production according to claim 8, wherein: the fan blades (28) are all arc-shaped fan blades, the cross sections of the guide plates (7) are triangular, the high middle part of each guide plate (7) is located in the middle of the shovel groove (6), and the low parts of the two sides of each guide plate (7) are located on the two sides of the shovel groove (6) respectively.