阅读说明：本技术 一种带有清料机构的混砂机 (Roller mill with clear material mechanism ) 是由 杨文晶 邓道君 王计振 肖宇程 邓忠顺 于 2019-09-16 设计创作，主要内容包括：一种带有清料机构的混砂机,本发明涉及混砂机技术领域；箱体上端的左侧设有压碾机构,压碾机构中的外壳体固定在箱体上表面的左侧上,箱体内部的上侧设有清料机构,清料机构中的二号电机固定在箱体的上侧壁上,清料机构的下侧设有混合机构,混合机构中的气缸固定箱体下表面的左侧,箱体右侧壁的下端上插设有出料管,出料管的中端上设置有单向阀,单向阀的上侧设有抽水泵,抽水泵固定在箱体右侧壁的上端,抽水泵的出水口通过管道与箱体的内部连接,在混砂机内部的上侧设置有清料机构,通过清料机构对箱体的内侧壁进行清料,将侧壁上的型砂刮至箱体内部,防止型砂站在箱体的内侧壁上,从而减少资源的浪费,本发明具有设置合理,制作成本低等优点。(the invention discloses a sand mixer with a material cleaning mechanism, and relates to the technical field of sand mixers; the left side of the upper end of the box body is provided with a crushing mechanism, an outer shell in the crushing mechanism is fixed on the left side of the upper surface of the box body, the upper side of the interior of the box body is provided with a material cleaning mechanism, a second motor in the material cleaning mechanism is fixed on the upper side wall of the box body, the lower side of the material cleaning mechanism is provided with a mixing mechanism, an air cylinder in the mixing mechanism is fixed on the left side of the lower surface of the box body, a discharging pipe is inserted on the lower end of the right side wall of the box body, the middle end of the discharging pipe is provided with a one-way valve, the upper side of the one-way valve is provided with a water suction pump which is fixed on the upper end of the right side wall of the box body, the water outlet of the water suction pump is connected with the interior of the box body through a pipeline, the upper side of the interior of the sand mixer is provided with the, low manufacturing cost and the like.)

1. The utility model provides a roller mill with clear material mechanism which characterized in that: the automatic material cleaning device comprises a box body (1), support legs (2), a pressing and grinding mechanism (3), a material cleaning mechanism (4), a mixing mechanism (5), a discharging pipe (6), a one-way valve (7) and a water suction pump (8), wherein the support legs (2) are fixed at four corners of the lower surface of the box body (1), the pressing and grinding mechanism (3) is arranged at the left side of the upper end of the box body (1), an outer shell (3-1) in the pressing and grinding mechanism (3) is fixed on the left side of the upper surface of the box body (1), the material cleaning mechanism (4) is arranged at the upper side inside the box body (1), a second motor (4-1) in the material cleaning mechanism (4) is fixed on the upper side wall of the box body (1), the mixing mechanism (5) is arranged at the lower side of the material cleaning mechanism (4), a cylinder (5-1) in the mixing mechanism (5) is fixed at the left side of the lower surface of, the left end of the discharge pipe (6) and the inner side wall of the right side of the box body (1) are arranged in the same vertical plane, the right end of the discharge pipe penetrates through the right side wall of the box body (1) and is exposed at the right end of the box body (1), a check valve (7) is arranged at the middle end of the discharge pipe (6), a water suction pump (8) is arranged on the upper side of the check valve (7), the water suction pump (8) is fixed at the upper end of the right side wall of the box body (1), a water inlet of the water suction pump (8) is connected with an external water source through a pipeline, and a water outlet of the water;

The rolling mechanism (3) also comprises a feed inlet (3-2), rolling wheels (3-3), a first motor (3-4) and guide pipes (3-5), wherein the feed inlet (3-2) is inserted into the middle end of the upper side wall of the outer shell (3-1), the upper end of the feed inlet (3-2) is exposed at the upper side of the outer shell (3-1), the lower end of the feed inlet and the inner side wall of the upper side of the outer shell (3-1) are arranged on the same horizontal plane, a plurality of rolling wheels (3-3) are arranged at the center inside of the outer shell (3-1), the plurality of rolling wheels (3-3) are arranged on the same horizontal plane, gaps are left between every two rolling wheels, the rotating shafts at the front end and the rear end of each rolling wheel (3-3) are respectively and rotatably connected with the inner side walls at the front side and, a first motor (3-4) is fixed at the left end of the rear side wall of the outer shell (3-1), the first motor (3-4) is connected with an external power supply, an output shaft of the first motor (3-4) is inserted into the rear side wall of the outer shell (3-1) and is fixedly connected with a rotating shaft at the rear end of the leftmost rolling wheel (3-3), a guide pipe (3-5) is inserted at the middle end of the lower side wall of the outer shell (3-1), and the lower end of the guide pipe (3-5) sequentially penetrates through the lower side wall of the outer shell (3-1) and the upper side wall of the box body (1) and is arranged in the same horizontal plane with the lower surface of the upper side wall of the box body (1);

The cleaning mechanism (4) also comprises a rotating rod (4-2), a sleeve (4-3), a spring (4-4), a support rod (4-5) and a scraping rod (4-6), the upper end of the rotating rod (4-2) penetrates through the upper side wall of the box body (1) and then is fixedly connected with an output shaft of a second motor (4-1), the second motor (4-1) is connected with an external power supply, the sleeve (4-3) is fixed on the side wall of the lower end of the rotating rod (4-2), the spring (4-4) is embedded in the sleeve (4-3), the right end of the spring (4-4) is fixedly connected with the inner side wall on the right side of the sleeve (4-3), the left end of the spring is fixedly connected with the right end of the support rod (4-5), the left end of the support rod (4-5) penetrates through the left end of the sleeve (4-3), the left side wall of the scraping rod (4-6) is in contact with the inner side wall of the left side of the box body (1);

The mixing mechanism (5) further comprises a stirring shaft (5-2), stirring blades (5-3) and a third motor (5-4), the air cylinder (5-1) is connected with an external air source, a piston rod of the air cylinder is fixedly connected with the outer side wall of the third motor (5-4) through a connecting rod, the third motor (5-4) is connected with an external power supply, the third motor (5-4) is arranged on the lower side of the box body (1) in a suspending mode, an output shaft of the third motor penetrates through the lower side wall of the box body (1) and then is fixedly connected with the stirring shaft (5-2), the contact position of the output shaft of the third motor (5-4) and the inner side wall of the lower side of the box body (1) is sealed through a graphite ring, the stirring shaft (5-2) is arranged in the box body (1) in a suspending mode, and a plurality of stirring blades (5-3), the stirring blade (5-3) is suspended at the lower end of the interior of the box body (1), a control switch (5-5) is arranged below the left side of the box body (1), the control switch (5-5) is connected with the air cylinder (5-1), the control switch (5-5) is fixed on a fixing plate (5-6), and the front end and the rear end of the fixing plate (5-6) are respectively fixed on the support legs (2) at the front side and the rear side.

2. The sand mixer with the material cleaning mechanism as claimed in claim 1, wherein: the downside of discharging pipe (6) left end is equipped with deflector (9) No. one, the right-hand member of this deflector (9) is fixed on the inside wall on box (1) right side, after its left end tilt up, fix on the left inside wall of box (1), both ends respectively with the inside wall fixed connection of box (1) front and back both sides around deflector (9), this deflector (9) movable sleeve is established on (mixing) shaft (5-2), the molding sand after the system completion mixes from deflector (9) upflow to discharging pipe (6) in.

3. the sand mixer with the material cleaning mechanism as claimed in claim 1, wherein: all be fixed with deflector (10) No. two on the inside wall of shell body (3-1) left and right sides, these deflector (10) No. two set up in the downside of rolling wheel (3-3), the other end of deflector (10) do not is to the central back of inclining, fix on the inside wall of shell body (3-1) downside, and set up respectively in the left and right sides of stand pipe (3-5), the molding sand that rolls flows to in stand pipe (3-5) via deflector (10) No. two.

4. The sand mixer with the material cleaning mechanism as claimed in claim 1, wherein: the right side wall of the third motor (5-4) is connected with a linear bearing on a guide post (11) through a connecting rod, and the upper end of the guide post (11) is fixed on the lower surface of the box body (1).

5. The sand mixer with the material cleaning mechanism as claimed in claim 1, wherein: the control switch (5-5) is a reset switch, a cam (12) is suspended on the upper side of the control switch (5-5), a rotating shaft (13) is inserted into the center of the cam (12), the front end of the rotating shaft (13) is screwed with the front side supporting leg (2) through a bearing, the rear end of the rotating shaft passes through the rear side supporting leg (2) and then is fixedly connected with an output shaft of a fourth motor (14), the fourth motor (14) is fixed on the rear side wall of the rear side supporting leg (2), the fourth motor (14) is connected with an external power supply, when the cam (12) rotates, when the protrusion of the cam (12) rotates to the lower part, the control switch (5-5) can be pressed down to start the air cylinder (5-1), and when the protrusion of the cam (12) rotates to the upper part, the control switch (5-5) is loosened to close the air cylinder (5-1).

6. the sand mixer with the material cleaning mechanism as claimed in claim 1, wherein: the front side wall of the box body (1) is provided with an observation window (15), and the condition inside the box body (1) is observed through the observation window (15).

7. The sand mixer with the material cleaning mechanism as claimed in claim 1, wherein: the working principle is as follows: when the sand mill is used, molding sand enters the outer shell (3-1) from the feeding hole (3-2), the first motor (3-4) is started, the first motor (3-4) drives the left rolling wheel (3-3) to rotate, the rolling wheel (3-3) rolls the molding sand, the rolled molding sand enters the box body (1) through the guide pipe (3-5), the water suction pump (8) is started, an external water source is pumped into the box body (1) through the water suction pump (8), the second motor (4-1) and the third motor (5-4) are started, the second motor (4-1) drives the rotating rod (4-2) to rotate, the rotating rod (4-2) drives the sleeve pipe (4-3) to rotate, the sleeve pipe (4-3) drives the supporting rod (4-5) to rotate, the supporting rod (4-5) drives the scraping rod (4-6) to rotate, the scraping rod (4-6) can clean the inner side wall of the box body (1), the third motor (5-4) drives the stirring shaft (5-2) to rotate, the stirring shaft (5-2) drives the stirring blade (5-3) to rotate, the molding sand in the box body (1) is stirred through the stirring blade (5-3), the cylinder (5-1) is started through the control switch (5-5), the piston rod of the cylinder (5-1) drives the third motor (5-4) to move downwards, the third motor (5-4) drives the stirring shaft (5-2) to move downwards, then the cylinder (5-1) is closed through the control switch (5-5), the cylinder (5-1) drives the third motor (5-4) to move upwards, the third motor (5-4) drives the stirring shaft (5-2) to move upwards, therefore, the stirring blades (5-3) can move up and down in the stirring process, the mixing effect is improved, after the mixing is finished, the one-way valve (7) is opened, and the mixed molding sand is discharged from the discharge pipe (6).

Technical Field

the invention relates to the technical field of sand mixers, in particular to a sand mixer with a material cleaning mechanism.

Background

The sand mixer is used as a device for mixing molding sand, is widely used in the casting industry, the molding sand of the traditional sand mixer often adheres to the inside of a shell of the sand mixer in the process of mixing the sand, so that the mixing of the molding sand is not uniform, the mixing of the molding sand can not be guaranteed to meet the required standard, the quality of the molding sand can not be influenced, and the requirement of casting production can not be met, meanwhile, the molding sand can be adhered to the inner side wall of the shell of the sand mixer by a binder, when the molding sand is unloaded, the mixed molding sand can not be completely unloaded, the molding sand adheres to the shell of the sand mixer for a long time, after the molding sand is hardened, the molding sand is clear from the shell of the sand mixer and becomes very troublesome, if the molding sand is not cleaned in time, hard particles can be generated in the molding sand during the next mixing, the use requirement can not be met, the waste of molding sand resources is caused, and meanwhile, some operators can prevent the molding, therefore, the sand mixer is easy to damage, the service life of the sand mixer is influenced, and improvement is urgently needed.

disclosure of Invention

The invention aims to provide a sand mixer with a cleaning mechanism, which is reasonable in design and convenient to use, aiming at the defects and shortcomings of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the automatic material cleaning device comprises a box body, support legs, a pressing and grinding mechanism, a material cleaning mechanism, a mixing mechanism, a discharging pipe, a check valve and a water suction pump, wherein the support legs are fixed at four corners of the lower surface of the box body, the pressing and grinding mechanism is arranged at the left side of the upper end of the box body, an outer shell in the pressing and grinding mechanism is fixed at the left side of the upper surface of the box body, the material cleaning mechanism is arranged at the upper side inside the box body, a second motor in the material cleaning mechanism is fixed on the upper side wall of the box body, the mixing mechanism is arranged at the lower side of the material cleaning mechanism, a cylinder in the mixing mechanism is fixed at the left side of the lower surface of the box body, the discharging pipe is inserted at the lower end of the right side wall of the box body, the left end of the discharging pipe and the inner side wall at the right side of the box body are arranged in the, the water inlet of the water pump is connected with an external water source through a pipeline, and the water outlet of the water pump is connected with the inside of the box body through a pipeline;

The rolling mechanism further comprises a feed inlet, rolling wheels, a first motor and a guide pipe, wherein the feed inlet is inserted into the middle end of the side wall of the outer shell, the upper end of the feed inlet is exposed at the upper side of the outer shell, the lower end of the feed inlet and the inner side wall of the upper side of the outer shell are arranged on the same horizontal plane, a plurality of rolling wheels are arranged at the center inside the outer shell and are arranged on the same horizontal plane, gaps are reserved between every two rolling wheels, the rotating shafts at the front end and the rear end of each rolling wheel are respectively screwed with the inner side walls at the front side and the rear side of the outer shell through bearings, the first motor is fixed at the left end of the rear side wall of the outer shell and is connected with an external power supply, the output shaft of the first motor is inserted into the rear side wall of the outer shell and is fixedly connected with the rotating shaft at the rear end of the leftmost rolling wheel, the guide, The upper side wall of the box body is arranged at the back of the lower surface of the upper side wall of the box body in the same horizontal plane;

The material cleaning mechanism also comprises a rotating rod, a sleeve, a spring, a supporting rod and a scraping rod, wherein the upper end of the rotating rod is fixedly connected with an output shaft of a second motor after penetrating through the upper side wall of the box body;

above-mentioned mixing mechanism still contains the (mixing) shaft, stirring leaf and No. three motors, the cylinder is connected with outside air supply, and the lateral wall fixed connection of its piston rod through connecting rod and No. three motors, No. three motors are connected with external power source, No. three motors hang and establish the downside at the box, and its output shaft passes behind the lower lateral wall of box, with (mixing) shaft fixed connection, the output shaft of No. three motors passes through graphite circle with the inside wall contact department of box downside and seals, the inside at the box is established to the stirring shaft suspension, the equidistance is fixed with several stirring leaves on the lateral wall of (mixing) shaft, this stirring leaf hangs the lower extreme of establishing at the box inside, the left below of box is equipped with control switch, control switch is connected with the cylinder, this control switch fixes on the fixed plate, both ends are fixed.

Furthermore, the downside of discharging pipe left end is equipped with the deflector No. one, and the right-hand member of this deflector is fixed on the inside wall on box right side, and after its left end tilt up, fix on the left inside wall of box, both ends are fixed with the inside wall fixed connection of both sides around the box respectively around the deflector, and this deflector movable sleeve is established on the (mixing) shaft.

Furthermore, all be fixed with the deflector No. two on the inside wall of shell body left and right sides, this deflector No. two sets up in the downside of rolling wheel, and the other end of deflector No. two inclines the back to the center respectively, fixes on the inside wall of shell body downside, and sets up respectively in the left and right sides of stand pipe.

furthermore, the right side wall of the third motor is connected with the linear bearing on the guide post through a connecting rod, and the upper end of the guide post is fixed on the lower surface of the box body.

Furthermore, the control switch is a reset switch, a cam is suspended on the upper side of the control switch, a rotating shaft is inserted in the center of the cam, the front end of the rotating shaft is connected with the front-side support leg in a rotating mode through a bearing, the rear end of the rotating shaft penetrates through the rear-side support leg and then is fixedly connected with an output shaft of a fourth motor, the fourth motor is fixed on the rear side wall of the rear-side support leg, and the fourth motor 14 is connected with an external power supply.

furthermore, an observation window is arranged on the front side wall of the box body.

after adopting the structure, the invention has the following beneficial effects:

1. the upper side in the sand mixer is provided with the material cleaning mechanism, the inner side wall of the box body is cleaned through the material cleaning mechanism, molding sand on the side wall is scraped into the box body, and the molding sand is prevented from standing on the inner side wall of the box body, so that the waste of resources is reduced;

2. the left side of the upper side of the box body is provided with a pressing and rolling mechanism, and the molding sand can be rolled by the pressing and rolling mechanism before entering the box body, so that the quality of the molding sand can be improved;

3. no. three motors pass through the connecting rod to be fixed on the piston rod of cylinder, and the accessible starts the cylinder and drives No. three motors and reciprocate, and No. three motors drive the (mixing) shaft and reciprocate to can make the stirring leaf reciprocate at the in-process of stirring, and then the abundant of multiplicable mixture.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front cross-sectional view of the present invention.

fig. 3 is a top view of the present invention.

Fig. 4 is a sectional view of the material cleaning mechanism of the present invention.

Description of reference numerals:

The device comprises a box body 1, support legs 2, a rolling mechanism 3, an outer shell 3-1, a feeding port 3-2, a rolling wheel 3-3, a first motor 3-4, a guide pipe 3-5, a material cleaning mechanism 4, a second motor 4-1, a rotating rod 4-2, a sleeve 4-3, a spring 4-4, a support rod 4-5, a scraping rod 4-6, a mixing mechanism 5, a cylinder 5-1, a stirring shaft 5-2, a stirring blade 5-3, a third motor 5-4, a control switch 5-5, a fixing plate 5-6, a discharging pipe 6, a one-way valve 7, a water pump 8, a first guide plate 9, a second guide plate 10, a guide column 11, a cam 12, a rotating shaft 13, a fourth motor 14 and an observation window 15.

the specific implementation mode is as follows:

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.

As shown in fig. 1 to 4, the following technical solutions are adopted in the present embodiment: the automatic material cleaning and discharging device comprises a box body 1, support legs 2, a rolling mechanism 3, a material cleaning mechanism 4, a mixing mechanism 5, a material discharging pipe 6, a one-way valve 7 and a water suction pump 8, wherein the support legs 2 are welded and fixed at four corners of the lower surface of the box body 1, an observation window 15 is embedded on the front side wall of the box body 1, the condition inside the box body 1 can be conveniently known by workers, the rolling mechanism 3 is arranged on the left side of the upper surface of the box body 1, an outer shell 3-1 in the rolling mechanism 3 is welded and fixed on the left side of the upper surface of the box body 1, the rolling mechanism 3 further comprises a feeding port 3-2, a rolling wheel 3-3, a first motor 3-4 and a guide pipe 3-5, the feeding port 3-2 is inserted and fixed on the middle end of the upper side wall of the outer shell 3-1, the upper end of the feeding port 3-2 is exposed on the upper side of the outer shell, a plurality of rolling wheels 3-3 are arranged at the center inside the outer shell 3-1, the rolling wheels 3-3 are arranged in the same horizontal plane, a gap is left between every two rolling wheels, the rotating shafts at the front end and the rear end of the rolling wheel 3-3 are respectively screwed with the inner side walls at the front side and the rear side of the outer shell 3-1 through bearings, the bearings are respectively embedded in the front side wall and the rear side wall of the outer shell 3-1, the outer ring of the bearing is respectively welded and fixed with the inner side walls at the front side and the rear side of the outer shell 3-1, the inner ring of the bearing is respectively welded and fixed with the rotating shafts at the front end and the rear end of the rolling wheel 3-3, a motor 3-4 is fixed on the left end of the rear side wall of the outer shell 3-1 through bolts, the model of the motor 3-4 is 40KTYZ, the motor 3-4 is connected with, the lower end of the guide pipe 3-5 penetrates through the lower side wall of the outer shell 3-1 and the upper side wall of the box body 1 in sequence and is arranged in the same horizontal plane with the lower surface of the upper side wall of the box body 1, second guide plates 10 are welded and fixed on the inner side walls of the left side and the right side of the outer shell 3-1, the second guide plates 10 are arranged on the lower sides of the rolling wheels 3-3, the other ends of the second guide plates 10 incline towards the center respectively and are welded and fixed on the inner side walls of the lower side of the outer shell 3-1 and are arranged on the left side and the right side of the guide pipes 3-5 respectively, and the rolled molding sand can flow into the guide pipes 3-5 conveniently;

the upper side in the box body 1 is provided with a material cleaning mechanism 4, a second motor 4-1 in the material cleaning mechanism 4 is fixed on the upper side wall of the box body 1 through bolts, the material cleaning mechanism 4 also comprises a rotating rod 4-2, a sleeve 4-3, a spring 4-4, a support rod 4-5 and a scraping rod 4-6, the upper end of the rotating rod 4-2 penetrates through the upper side wall of the box body 1 and is welded and fixed with an output shaft of the second motor 4-1, the second motor 4-1 is connected with an external power supply, the model of the second motor 4-1 is 60KTYZ, the sleeve 4-3 is welded and fixed on the side wall at the lower end of the rotating rod 4-2, the spring 4-4 is embedded in the sleeve 4-3, the right end of the spring 4-4 is fixedly connected with the inner side wall at the right side of the sleeve 4-3, and the left end of the spring is welded and fixed with, the left end of the support rod 4-5 penetrates through the left end of the sleeve 4-3 and then is welded and fixed with the right side wall at the upper end of the scraping rod 4-6, and the left side wall of the scraping rod 4-6 is arranged in contact with the inner side wall at the left side of the box body 1; the lower side of the material cleaning mechanism 4 is provided with a mixing mechanism 5,

An air cylinder 5-1 in a mixing mechanism 5 is fixed on the left side of the lower surface of a box body 1 through a bolt, the mixing mechanism 5 further comprises a stirring shaft 5-2, a stirring blade 5-3 and a third motor 5-4, the air cylinder 5-1 is connected with an external air source, a piston rod of the air cylinder 5-1 is fixedly connected with the outer side wall of the third motor 5-4 through a connecting rod, one end of the connecting rod is welded and fixed on the piston rod of the air cylinder 5-1, the other end of the connecting rod is welded and fixed on the left side wall of the third motor 5-4, the model of the third motor 5-4 is 50KTYZ, the third motor 5-4 is connected with an external power supply, the third motor 5-4 is suspended on the lower side of the box body 1, an output shaft of the third motor passes through the lower side wall of the box body 1 and then is welded and fixed with the stirring shaft 5-, the graphite ring is embedded in the lower side wall of the box body 1, the outer ring is fixedly adhered to the inner side wall of the lower side of the box body 1, the inner ring of the graphite ring is arranged in contact with the output shaft of the third motor 5-4, the sealing effect is achieved while the vertical movement of the third motor 5-4 is not hindered, the right side wall of the third motor 5-4 is connected with the linear bearing on the guide post 11 through the connecting rod, the left end of the connecting rod is welded and fixed on the right side wall of the third motor 5-4, the right end of the connecting rod is welded and fixed on the linear bearing of the guide post 11, the upper end of the guide post 11 is welded and fixed on the lower surface of the box body 1, the stability of the third motor 5-4 can be increased, the stirring shaft 5-2 is suspended in the box body 1, a plurality of stirring blades 5-3 are welded and fixed on the side wall of the stirring shaft 5-2 at equal, a control switch 5-5 is arranged below the left side of the box body 1, the control switch 5-5 is connected with the cylinder 5-1, the control switch 5-5 is fixed on a fixed plate 5-6 through bolts, the front end and the rear end of the fixed plate 5-6 are respectively welded and fixed on the support legs 2 at the front side and the rear side, the control switch 5-5 is a reset switch, a cam 12 is suspended at the upper side of the control switch 5-5, a rotating shaft 13 is inserted in the center of the cam 12, the front end of the rotating shaft 13 is screwed with the support legs 2 at the front side through a bearing, the bearing is embedded in the support legs 2 at the front side, the outer ring of the bearing is welded and fixed with the inner side wall of the support legs 2, the inner ring of the bearing is welded and fixed with the front end of the rotating shaft 13, the rear end of the rotating shaft 13 passes through the support legs 2 at the rear side and is welded and fixed, the fourth motor 14 is connected with an external power supply, the model of the fourth motor 14 is 40KTYZ, and the control switch 5-5 is controlled by the cam 12, so that manual operation is not needed, the workload of workers is reduced,

a discharge pipe 6 is inserted and fixed on the lower end of the right side wall of the box body 1, the left end of the discharge pipe 6 is arranged in the same vertical plane with the inner side wall on the right side of the box body 1, the right end of the discharge pipe passes through the right side wall of the box body 1 and is exposed at the right end of the box body 1, a first guide plate 9 is arranged on the lower side of the left end of the discharge pipe 6, the right end of the first guide plate 9 is welded and fixed on the inner side wall on the right side of the box body 1, the left end of the first guide plate 9 is welded and fixed on the inner side wall on the left side of the box body 1 after inclining upwards, the front end and the rear end of the first guide plate 9 are respectively welded and fixed with the inner side walls on the front side and the rear side of the box body 1, the first guide plate 9 is movably sleeved on a stirring shaft 5-2 and can facilitate the mixed molding sand to flow, the water inlet of the water pump 8 is connected with an external water source through a pipeline, and the water outlet of the water pump is connected with the inside of the box body 1 through a pipeline;

The working principle of the specific embodiment is as follows: when the sand mill is used, molding sand enters the outer shell 3-1 from the feeding hole 3-2, the first motor 3-4 is started, the first motor 3-4 drives the left rolling wheel 3-3 to rotate, the rolling wheel 3-3 rolls the molding sand, the rolled molding sand flows into the guide pipe 3-5 through the second guide plate 10 and then enters the box body 1 through the guide pipe 3-5, the water suction pump 8 is started, an external water source is pumped into the box body 1 through the water suction pump 8, the second motor 4-1, the third motor 5-4 and the fourth motor 14 are started, the second motor 4-1 drives the rotating rod 4-2 to rotate, the rotating rod 4-2 drives the sleeve pipe 4-3 to rotate, the sleeve pipe 4-3 drives the supporting rod 4-5 to rotate, the supporting rod 4-5 drives the scraping rod 4-6 to rotate, the scraping rod 4-6 can clean the inner side wall of the box body 1, the third motor 5-4 drives the stirring shaft 5-2 to rotate, the stirring shaft 5-2 drives the stirring blade 5-3 to rotate, the molding sand in the box body 1 is stirred through the stirring blade 5-3, the fourth motor 14 drives the cam 12 to rotate through the rotating shaft 13, when the bulge of the cam 12 rotates to the lower side, the control switch 5-5 is pressed down by the bulge, the control switch 5-5 starts the air cylinder 5-1, the piston rod of the air cylinder 5-1 drives the third motor 5-4 to move downwards, the third motor 5-4 drives the stirring shaft 5-2 to move downwards, when the bulge of the cam 12 rotates to the upper side, the control switch 5-5 automatically resets, the air cylinder 5-1 is closed, and the air cylinder 5-1 drives the third motor 5-4 to move upwards, no. three motors 5-4 drive (mixing) shaft 5-2 upward movement to can make stirring leaf 5-3 reciprocate at the in-process of stirring, increase the effect of mixing, after a period of time, the condition of box 1 inside can be observed to accessible observation window 15, after mixing, then open check valve 7, the molding sand after mixing is discharged from discharging pipe 6.

after adopting above-mentioned structure, this embodiment's beneficial effect is as follows:

1. a cleaning mechanism 4 is arranged on the upper side in the sand mixer, the cleaning mechanism 4 is used for cleaning the inner side wall of the box body 1, molding sand on the side wall is scraped into the box body 1, and the molding sand is prevented from standing on the inner side wall of the box body 1, so that the waste of resources is reduced;

2. The left side of the upper side of the box body 1 is provided with a rolling mechanism 3, and molding sand can be rolled by the rolling mechanism 3 before entering the box body 1, so that the quality of the molding sand can be improved;

3. the third motor 5-4 is fixed on a piston rod of the cylinder 5-1 through a connecting rod, the third motor 5-4 can be driven to move up and down by starting the cylinder 5-1, and the third motor 5-4 drives the stirring shaft 5-2 to move up and down, so that the stirring blade 5-3 can move up and down in the stirring process, and the mixing sufficiency can be increased;

4. The cylinder 5-1 is connected with the control switch 5-5, the control switch 5-5 is a reset switch, the cam 12 presses down or releases the reset switch through a bump on the cam when rotating, so that the cylinder 5-1 can be repeatedly started and closed through the reset switch, the third motor 5-4 can be driven to repeatedly move up and down, the cylinder 5-1 does not need to be manually controlled, and the labor force of workers is reduced;

5. The front side wall of the box body 1 is provided with an observation window 15, and the inside condition can be observed through the observation window 15.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.