阅读说明：本技术 一种射砂用导向装置 (Guide device for sand shooting ) 是由 刘德军 黄玉贤 戴建军 严静 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种射砂用导向装置,包括机体和内腔,内腔设置在机体内部,承重板顶端接收沙粒,到达一定重量时,单片机控制升降杆下降,当承重板底端触碰到碰撞传感器时,单片机控制升降杆停止运行,单片机控制驱动机构开始运动,承重板移至入液口下方,进行固化,使得射砂机内部不需要使用导管进行限位运行,移料管限制移板,整体智能化,在承重板顶端设置称重传感器,沙粒质量到一定数目时,称重传感器将电信号传递给单片机进行分析,单片机发出指令,控制升降杆,使得可以控制固化的芯砂质量相同,避免造成芯砂受力不同,在内腔内部设置挤出器,将固化后的芯砂通过伸缩缸进行挤出射砂机内腔,使得芯砂在整个制造过程中,保持完整性。(The invention discloses a guiding device for shooting sand, which comprises a machine body and an inner cavity, wherein the inner cavity is arranged in the machine body, the top end of a bearing plate receives sand grains, when a certain weight is reached, a single chip microcomputer controls a lifting rod to descend, when the bottom end of the bearing plate touches a collision sensor, the single chip microcomputer controls the lifting rod to stop running, a driving mechanism is controlled by the single chip microcomputer to start running, the bearing plate is moved to the position below a liquid inlet to be solidified, a guide pipe is not needed to be used for limiting running in the shooting machine, a material moving pipe limits the moving plate, the whole is intelligent, weighing sensors are arranged at the top end of the bearing plate, when the quality of the sand grains reaches a certain number, the weighing sensors transmit electric signals to the single chip microcomputer to be analyzed, the single chip microcomputer sends an instruction to control the lifting rod, the quality of solidified core sand can be controlled to be the same, the stress of the core sand is prevented from being, so that the core sand maintains its integrity throughout the manufacturing process.)

1. The utility model provides a penetrate guider for sand, includes organism (1) and inner chamber (2), and inner chamber (2) set up inside organism (1), its characterized in that: the machine body (1) comprises a control panel (11), a vent hole (12), a liquid inlet (13), a feed inlet (14), a discharge outlet (15) and a material platform (16), the material platform (16) is connected to the bottom end of one side of the machine body (1), the control panel (11), the vent hole (12), the liquid inlet (13), the feed inlet (14) and the discharge outlet (15) are arranged on the outer surface of the machine body (1), the control panel (11) and the vent hole (12) are arranged at the front end of the machine body (1), the control panel (11) is arranged on one side of the machine body (1), the liquid inlet (13) and the feed inlet (14) are arranged at the top end of the machine body (1), the liquid inlet (13) is arranged on one side of the feed inlet (14), the vent hole (12) is arranged below the liquid inlet (13), and the discharge outlet (15) is arranged at the lower end of;

inner chamber (2) are including extruder (21), move way (22), fan (23), pan feeding pipe (24) and interlayer (25), are equipped with interlayer (25) between organism (1) bottom and inner chamber (2) bottom, and extruder (21), move way (22), fan (23) and pan feeding pipe (24) set up in the inside bottom of inner chamber (2), and pan feeding pipe (24) set up in feed inlet (14) bottom, and pan feeding pipe (24) side is connected with moving way (22) one end, moves way (22) other end and connects at extruder (21) side, interlayer (25) are including moving board (251) and bearing plate (252), move board (251) and set up at bearing plate (252) lower extreme.

2. A guide for a sand shot as defined in claim 1, wherein: the extruder (21) comprises an extrusion cavity (211), an extrusion block (212), a telescopic cylinder (213) and an inlet (214), the extrusion block (212) is arranged at the rear end inside the extrusion cavity (211), the telescopic cylinder (213) is arranged at the rear end of the extrusion block (212), the inlet (214) is arranged at the side end of the extrusion cavity (211), and the inlet (214) at the side end of the extrusion cavity (211) is arranged inside one end of a moving channel (22).

3. A guide for a sand shot as defined in claim 1, wherein: the feeding pipe (24) comprises a material receiving pipe (241) and a material moving pipe (242), the top end of the material receiving pipe (241) is connected to the bottom end of the feeding hole (14), the material receiving pipe (241) is arranged on one side of the lower end of the material receiving pipe (241), and the material receiving pipe (241) and the material moving pipe (242) are communicated with the interlayer (25).

4. A guide for a sand shot as defined in claim 1, wherein: move board (251) and include lifter (2511), collision sensor (2512), singlechip (2513) and actuating mechanism (2514), move board (251) top middle part fixed connection lifter (2511) bottom, lifter (2511) middle-end is equipped with collision sensor (2512), and singlechip (2513) setting is moving board (251) top one side, and actuating mechanism (2514) setting is moving board (251) bottom.

5. A guide for a sand shot as defined in claim 1, wherein: the bearing plate (252) comprises a weighing sensor (2521), and the top end of the bearing plate (252) is provided with the weighing sensor (2521).

6. A guide for a sand shot as defined in claim 4, wherein: the impact sensor (2512) is an 95920-3K000 model impact sensor.

7. A guide for a sand shot as defined in claim 5, wherein: the weighing sensor (2521) is a TJH-10 type weighing sensor.

8. A guide for a sand shot as defined in claim 1, wherein: the opening degree of the material receiving pipe (241) is controlled in real time by using the value transmitted to the singlechip (2513) by the retransmission sensor (2521), so that the weight of the sand grains received by the bearing plate (252) can be accurately controlled,

step A1: converting the transmission value of the load cell (2521) into a weight value m (t) using equation (1)₀)

Wherein m (t)₀) Is represented at 0-t₀Weight converted from transmission value of load cell (2521) during timeA value; c (t)₀) Is represented at 0-t₀-a transmission value of the load cell (2521) over time; g represents the gravity acceleration (the value is 9.8 m/s)²)；t₀Represents t₀Time of day;

step A2: in order to ensure that the material receiving pipe (241) is just closed when the weight of the sand particles received by the bearing plate (252) reaches the preset weight, the formula (2) is used for obtaining the weight value m of the sand particles received by the bearing plate (252) within the time that the singlechip (2513) controls the material receiving pipe (241) to be closed at the maximum speed

Wherein m represents the weight value of sand particles received by the bearing plate (252) in the time when the single chip microcomputer (2513) controls the maximum speed closing of the material receiving pipe (241), gamma represents the maximum opening angle (gamma is 180 degrees) of the material receiving pipe (241), delta t represents a control pulse time sent by the single chip microcomputer (2513) to the material receiving pipe (241), n represents the motor-driven subdivision value of the control opening in the material receiving pipe (241), k represents the reduction ratio of a motor reducer of the control opening in the material receiving pipe (241), Q represents the weight of the sand particles received by the bearing plate (252) in the delta t time of the maximum opening angle of the material receiving pipe (241), and t represents the t moment;

step A3: the real-time opening angle alpha (t) of the singlechip (2513) required to control the material receiving pipe (241) in real time is obtained by using the formula (3)

Wherein α (t) indicates that the singlechip (2513) needs to control the opening angle of the material receiving pipe (241) at the time t, and m_yRepresents a preset weight value, and u () represents a step function (the function value is 0 when the value in parentheses is less than 0, and the function value is 1 when the value in parentheses is 0 or more).

Technical Field

The invention relates to the technical field of sand shooting machines, in particular to a guide device for sand shooting.

Background

The core shooter commonly used for casting various sand cores utilizes compressed air as power to evenly shoot sand grains into a core box and compact and mold the sand grains, and the general working flow is as follows: firstly, injecting core sand into a sand storage cylinder, then injecting the core sand into a core box by a jet head at the bottom, compressing air to form the core sand, blowing curing gas in, demoulding after the core sand is cured and formed, and finally moving the core sand into a core ejecting station to eject the core.

Present penetrate guider for sand, the sand grain carries out the quality before solidifying inequality, and the degree that leads to the atress after the solidification is different, and core sand can suffer the damage, and the core sand after the solidification falls at the end, easily impairs, and the equipment is inside to be controlled the orbit by the pipe, lacks intellectuality.

In view of the above problems, the present invention provides a guide device for shooting sand.

Disclosure of Invention

The invention aims to provide a guide device for shooting sand, which has the advantages of integral intellectualization, controllable quality of core sand before solidification and capability of ensuring the integrity of the core sand in the manufacturing process, thereby solving the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a guide device for sand shooting comprises a machine body and an inner cavity, wherein the inner cavity is arranged inside the machine body, the machine body comprises a control panel, a ventilation hole, a liquid inlet, a feed inlet, a discharge hole and a material platform, the bottom end of one side of the machine body is connected with the material platform, the control panel, the ventilation hole, the liquid inlet, the feed inlet and the discharge hole are arranged on the outer surface of the machine body, the front end of the machine body is provided with the control panel and the ventilation hole, the control panel is arranged on one side of the machine body, the liquid inlet and the feed inlet are arranged at the top end of the machine body, the liquid inlet is arranged on one side of the feed inlet, the ventilation hole;

the inner chamber includes the extruder, moves way, fan, pan feeding pipe and interlayer, is equipped with the interlayer between organism bottom and the inner chamber bottom, and the extruder, move the inside bottom of inner chamber including way, fan and pan feeding pipe setting, and the pan feeding pipe setting is in the feed inlet bottom, and the pan feeding pipe side is connected with one end of moving way, moves the other end and connects at the extruder side, the interlayer is including moving board and bearing plate, moves the board setting at the bearing plate lower extreme.

Preferably, the extruder comprises an extrusion cavity, an extrusion block, a telescopic cylinder and an inlet, the extrusion block is arranged at the rear end of the interior of the extrusion cavity, the telescopic cylinder is arranged at the rear end of the extrusion block, the inlet is arranged at the side end of the extrusion cavity, and the inlet at the side end of the extrusion cavity is provided with the interior of one end of the moving channel.

Preferably, the feeding pipe comprises a material receiving pipe and a material moving pipe, the top end of the material receiving pipe is connected to the bottom end of the feeding port, the material receiving pipe is arranged on one side of the lower end of the material receiving pipe, and the material receiving pipe and the material moving pipe are communicated with the interlayer.

Preferably, move the board and include lifter, collision sensor, singlechip and actuating mechanism, move board top middle part fixed connection lifter bottom, the lifter middle-end is equipped with collision sensor, and the singlechip setting is moving board top one side, and actuating mechanism sets up and is moving the board bottom.

Preferably, the bearing plate comprises a weighing sensor, and the top end of the bearing plate is provided with the weighing sensor.

Preferably, the impact sensor is an 95920-3K000 model impact sensor.

Preferably, the load cell is a TJH-10 type load cell.

Preferably, the opening degree of the material receiving pipe (241) is controlled in real time by using the value transmitted to the singlechip (2513) by the retransmission sensor (2521), so that the weight of the sand received by the bearing plate (252) can be accurately controlled.

The method comprises the specific steps of preparing a composite material,

step A1: converting the transmission value of the load cell (2521) into a weight value m (t) using equation (1)₀)

Wherein m (t)₀) Is represented at 0-t₀-a weight value into which the transmission value of the load cell (2521) is converted over time; c (t)₀) Is represented at 0-t₀-a transmission value of the load cell (2521) over time;g represents the gravity acceleration (the value is 9.8m/s 2); t is t₀Represents t₀Time of day;

step A2: in order to ensure that the material receiving pipe (241) is just closed when the weight of the sand particles received by the bearing plate (252) reaches the preset weight, the formula (2) is used for obtaining the weight value m of the sand particles received by the bearing plate (252) within the time that the singlechip (2513) controls the material receiving pipe (241) to be closed at the maximum speed

Wherein m represents the weight value of sand particles received by the bearing plate (252) in the time when the single chip microcomputer (2513) controls the maximum speed closing of the material receiving pipe (241), gamma represents the maximum opening angle (gamma is 180 degrees) of the material receiving pipe (241), delta t represents a control pulse time sent by the single chip microcomputer (2513) to the material receiving pipe (241), n represents the motor-driven subdivision value of the control opening in the material receiving pipe (241), k represents the reduction ratio of a motor reducer of the control opening in the material receiving pipe (241), Q represents the weight of the sand particles received by the bearing plate (252) in the delta t time of the maximum opening angle of the material receiving pipe (241), and t represents the t moment;

step A3: the real-time opening angle alpha (t) of the singlechip (2513) required to control the material receiving pipe (241) in real time is obtained by using the formula (3)

Wherein α (t) indicates that the singlechip (2513) needs to control the opening angle of the material receiving pipe (241) at the time t, and m_yRepresents a preset weight value, u () represents a step function (0 when the value in parentheses is less than 0, and 1 when the value in parentheses is 0 or more);

the beneficial effects of the above technical scheme are: the transmission value of the weighing sensor (2521) is converted into a weight value by using the formula (1) in the step A1, the purpose is to convert the transmission value into a value which can be identified, calculated and stored by a single chip microcomputer (2513) so as to facilitate subsequent control, the transmission value in a time period is subjected to accumulation iterative regression value by using integration, and the obtained result is more accurate than other formulas such as average value calculation in the same time period, and the error is smaller; the weight value of the sand grains received by the bearing plate (252) is controlled by the singlechip (2513) obtained by the formula (2) within the time of closing the maximum speed of the material receiving pipe (241), and the aim is to feed the material receiving pipe (241) at the maximum opening angle when the weight of the sand grains does not reach the preset weight, close the material receiving pipe (241) at the maximum speed when the weight value is equal to the weight value of the sand grains received by the bearing plate (252) within the time of closing the maximum speed of the material receiving pipe (241) controlled by the singlechip (2513), ensure that the material receiving pipe (241) is just closed and the shortest in use when the weight of the sand grains is just equal to the preset weight, improve the working efficiency and time, ensure that the sand grains received at the top end of the bearing plate (252) each time can be accurately determined to be subjected to core sand solidification under the same weight by the real-time angle obtained by the formula (3), and ensure that the weight of the sand grains reaches the preset weight immediately when the sand grains do not, connect material pipe (241) can real-time reduction advance through the aperture, when sand grain weight just equals when predetermineeing weight, connect material pipe (241) just to close, reached the weight controllable of the sand grain received, accurate and automatic purpose.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the guiding device for sand shooting, the top end of the bearing plate receives sand particles, when the weight of the bearing plate reaches a certain value, the lifting rod is controlled to descend by the single chip microcomputer, when the bottom end of the bearing plate touches the collision sensor, the lifting rod is controlled to stop running by the single chip microcomputer, the driving mechanism is controlled to start to move by the single chip microcomputer, the bearing plate is moved to the position below the liquid inlet to be solidified, the inner part of the sand shooting machine does not need to be limited to run by a guide pipe, the moving pipe limits the moving plate, and the whole device is intelligent.

2. According to the guiding device for sand shooting, the weighing sensor is arranged at the top end of the bearing plate, when the sand particles reach a certain number, the weighing sensor transmits an electric signal to the single chip microcomputer for analysis, and the single chip microcomputer sends out an instruction to control the lifting rod, so that the solidified core sand can be controlled to have the same quality, and the core sand is prevented from being stressed differently.

3. The guiding device for shooting the sand is characterized in that an extruder is arranged in the inner cavity, and solidified core sand is extruded out of the inner cavity of the sand shooting machine through the telescopic cylinder, so that the integrity of the core sand is kept in the whole manufacturing process.

Drawings

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

FIG. 2 is a schematic diagram of the inner chamber structure of the present invention;

FIG. 3 is a schematic view of the spacer structure of the present invention;

fig. 4 is a block diagram of the system of the present invention.

In the figure: 1. a body; 11. a control panel; 12. a vent hole; 13. a liquid inlet; 14. a feed inlet; 15. a discharge port; 16. a material platform; 2. an inner cavity; 21. an extruder; 211. an extrusion chamber; 212. extruding the block; 213. a telescopic cylinder; 214. an inlet; 22. moving a channel; 23. a fan; 24. a feeding pipe; 241. a material receiving pipe; 242. a material moving pipe; 25. an interlayer; 251. moving the plate; 2511. a lifting rod; 2512. a collision sensor; 2513. a single chip microcomputer; 2514. a drive mechanism; 252. a bearing plate; 2521. and a weighing sensor.

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.

Please refer to fig. 1, a guider for shooting sand, including organism 1 and inner chamber 2, inner chamber 2 sets up inside organism 1, organism 1 includes control panel 11, ventilation hole 12, income liquid mouth 13, feed inlet 14, discharge gate 15 and material platform 16, material platform 16 is connected to organism 1 one side bottom, control panel 11, ventilation hole 12, income liquid mouth 13, feed inlet 14 and discharge gate 15 set up at organism 1 surface, organism 1 front end is equipped with control panel 11 and ventilation hole 12, control panel 11 sets up in organism 1 one side, income liquid mouth 13 and feed inlet 14 set up at organism 1 top, income liquid mouth 13 sets up in feed inlet 14 one side, ventilation hole 12 sets up in income liquid mouth 13 below, discharge gate 15 sets up in the same side with material platform 16 organism 1 lower extreme.

Referring to fig. 2, the inner cavity 2 includes an extruder 21, a moving channel 22, a fan 23, a feeding pipe 24 and an interlayer 25, the interlayer 25 is disposed between the bottom end of the machine body 1 and the bottom end of the inner cavity 2, the extruder 21, the moving channel 22, the fan 23 and the feeding pipe 24 are disposed at the bottom end of the inner cavity 2, the feeding pipe 24 is disposed at the bottom end of the feeding port 14, the side end of the feeding pipe 24 is connected to one end of the moving channel 22, the other end of the moving channel 22 is connected to the side end of the extruder 21, the interlayer 25 includes a moving plate 251 and a bearing plate 252, the moving plate 251 is disposed at the lower end of the bearing plate 252, the extruder 21 includes an extrusion cavity 211, an extrusion block 212, an extrusion cylinder 213, an inlet 214 is disposed at the rear end of the extrusion cavity 211, the feeding pipe 24 includes a material receiving pipe 241 and a material moving pipe 242, the top end of the material receiving pipe 241 is connected to the bottom end of the feeding port 14, a material receiving pipe 241 is arranged on one side of the lower end of the material receiving pipe 241, the material receiving pipe 241 and the material moving pipe 242 are communicated with the interlayer 25, the extruder 21 is arranged in the inner cavity 2, and solidified core sand is extruded out of the inner cavity 2 of the sand machine through the telescopic cylinder 213, so that the integrity of the core sand is kept in the whole manufacturing process.

Referring to fig. 3, the moving plate 251 includes a lifting rod 2511, a collision sensor 2512, a single chip microcomputer 2513 and a driving mechanism 2514, the middle of the top of the moving plate 251 is fixedly connected to the bottom of the lifting rod 2511, the middle of the lifting rod 2511 is provided with the collision sensor 2512, the single chip microcomputer 2513 is arranged on one side of the top of the moving plate 251, the driving mechanism 2514 is arranged at the bottom of the moving plate 251, the bearing plate 252 includes a weighing sensor 2521, the top of the bearing plate 252 is provided with the weighing sensor 2521, the collision sensor 2512 is a 95920-3K000 type collision sensor, the weighing sensor 2521 is a TJH-10 type weighing sensor, the top of the bearing plate 252 receives sand particles, when a certain weight is reached, the single chip microcomputer 2513 controls the lifting rod 2511 to descend, when the bottom of the bearing plate 252 touches the collision sensor 2512, the single chip microcomputer 2513 controls the lifting rod 2511 to stop running, the driving mechanism 2513 to start moving, the bearing plate 252 moves below, the solidification is carried out, so that the inside of the sand shooting machine does not need to use a guide pipe to carry out limiting operation, the material moving pipe 242 limits the moving plate 251, the whole is intelligent, the top end of the bearing plate 252 is provided with the weighing sensor 2521, when the sand grains reach a certain number, the weighing sensor 2521 transmits an electric signal to the single chip microcomputer 2513 to be analyzed, the single chip microcomputer 2513 sends an instruction, the lifting rod 2511 is controlled, the solidified core sand quality can be controlled to be the same, and the core sand is prevented from being stressed differently.

In summary, the following steps: the invention provides a guiding device for shooting sand, wherein the top end of a bearing plate 252 receives sand particles, when a certain weight is reached, a singlechip 2513 controls a lifting rod 2511 to descend, when the bottom end of the bearing plate 252 touches a collision sensor 2512, the singlechip 2513 controls the lifting rod 2511 to stop running, the singlechip 2513 controls a driving mechanism 2514 to start running, the bearing plate 252 moves to the position below a liquid inlet 13 for solidification, so that a guide pipe is not needed to be used for limiting running in a shooting machine, a material moving pipe 242 limits the moving plate 251, the whole is intelligent, a weighing sensor 2521 is arranged at the top end of the bearing plate 252, when the sand particles reach a certain number, the weighing sensor 2521 transmits an electric signal to the singlechip 2513 for analysis, the singlechip 2513 sends an instruction to control the lifting rod 2511, the quality of solidified core sand particles can be controlled to be the same, the situation that the core sand is stressed differently is avoided, an extruder 21 is arranged in an, the solidified core sand is extruded out of the inner cavity 2 of the sand maker through the telescopic cylinder 213, so that the core sand keeps integrity in the whole manufacturing process.

Preferably, the opening degree of the material receiving pipe (241) is controlled in real time by using the value transmitted to the singlechip (2513) by the retransmission sensor (2521), so that the weight of the sand received by the bearing plate (252) can be accurately controlled.

The method comprises the specific steps of preparing a composite material,

step A1: converting the transmission value of the load cell (2521) into a weight value m (t) using equation (1)₀)

Wherein m (t)₀) Is represented at 0-t₀-a weight value into which the transmission value of the load cell (2521) is converted over time; c (t)₀) Is represented at 0-t₀Time-based weighing sensorA transmitted value of a device (2521); g represents the gravity acceleration (the value is 9.8m/s 2); t is t₀Represents t₀Time of day;

step A2: in order to ensure that the material receiving pipe (241) is just closed when the weight of the sand particles received by the bearing plate (252) reaches the preset weight, the formula (2) is used for obtaining the weight value m of the sand particles received by the bearing plate (252) within the time that the singlechip (2513) controls the material receiving pipe (241) to be closed at the maximum speed

Wherein m represents the weight value of sand particles received by the bearing plate (252) in the time when the single chip microcomputer (2513) controls the maximum speed closing of the material receiving pipe (241), gamma represents the maximum opening angle (gamma is 180 degrees) of the material receiving pipe (241), delta t represents a control pulse time sent by the single chip microcomputer (2513) to the material receiving pipe (241), n represents the motor-driven subdivision value of the control opening in the material receiving pipe (241), k represents the reduction ratio of a motor reducer of the control opening in the material receiving pipe (241), Q represents the weight of the sand particles received by the bearing plate (252) in the delta t time of the maximum opening angle of the material receiving pipe (241), and t represents the t moment;

step A3: the real-time opening angle alpha (t) of the singlechip (2513) required to control the material receiving pipe (241) in real time is obtained by using the formula (3)

Wherein α (t) indicates that the singlechip (2513) needs to control the opening angle of the material receiving pipe (241) at the time t, and m_yRepresents a preset weight value, u () represents a step function (0 when the value in parentheses is less than 0, and 1 when the value in parentheses is 0 or more);

the beneficial effects of the above technical scheme are: the transmission value of the weighing sensor (2521) is converted into a weight value by using the formula (1) in the step A1, the purpose is to convert the transmission value into a value which can be identified, calculated and stored by a single chip microcomputer (2513) so as to facilitate subsequent control, the transmission value in a time period is subjected to accumulation iterative regression value by using integration, and the obtained result is more accurate than other formulas such as average value calculation in the same time period, and the error is smaller; the weight value of the sand grains received by the bearing plate (252) is controlled by the singlechip (2513) obtained by the formula (2) within the time of closing the maximum speed of the material receiving pipe (241), and the aim is to feed the material receiving pipe (241) at the maximum opening angle when the weight of the sand grains does not reach the preset weight, close the material receiving pipe (241) at the maximum speed when the weight value is equal to the weight value of the sand grains received by the bearing plate (252) within the time of closing the maximum speed of the material receiving pipe (241) controlled by the singlechip (2513), ensure that the material receiving pipe (241) is just closed and the shortest in use when the weight of the sand grains is just equal to the preset weight, improve the working efficiency and time, ensure that the sand grains received at the top end of the bearing plate (252) each time can be accurately determined to be subjected to core sand solidification under the same weight by the real-time angle obtained by the formula (3), and ensure that the weight of the sand grains reaches the preset weight immediately when the sand grains do not, connect material pipe (241) can real-time reduction advance through the aperture, when sand grain weight just equals when predetermineeing weight, connect material pipe (241) just to close, reached the weight controllable of the sand grain received, accurate and automatic purpose.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.