阅读说明：本技术 一种面粉自动包装生产装置控制系统 (Control system of automatic flour packaging production device ) 是由 曹红英 孟志刚 秦亚萍 尹克岩 于 2020-05-21 设计创作，主要内容包括：本发明涉及一种面粉自动包装生产装置控制系统包括供袋机构、取袋机构、整形机构、称重机构和缝合机构,整形机构用于包装袋口撑开,所述供袋机构、取袋机构、整形机构、称重机构和缝合机构之间设置有检测机构,所述检测机构包括多个位移传感器和光电传感器,所述位移传感连接有控制系统,所述控制系统用于根据检测机构反馈信号控制供袋机构、取袋机构、整形机构、称重机构和缝合机构顺序工作。本发明设置有供袋机构、取袋机构、整形机构、称重机构、缝合机构和控制系统,采用PID控制方式,使各机构有序作业提高了生产效率,节约了生产成本。(The invention relates to a control system of an automatic flour packaging production device, which comprises a bag supplying mechanism, a bag taking mechanism, a shaping mechanism, a weighing mechanism and a sewing mechanism, wherein the shaping mechanism is used for opening a packaging bag opening, a detection mechanism is arranged among the bag supplying mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism, the detection mechanism comprises a plurality of displacement sensors and photoelectric sensors, the displacement sensors are connected with a control system, and the control system is used for controlling the bag supplying mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism to work in sequence according to a feedback signal of the detection mechanism. The bag feeding mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism, the sewing mechanism and the control system are arranged, and a PID control mode is adopted, so that the mechanism can operate orderly, the production efficiency is improved, and the production cost is saved.)

1. A control system of an automatic flour packaging production device comprises a bag supplying mechanism (1), a bag taking mechanism (2), a shaping mechanism (3), a weighing mechanism (4) and a sewing mechanism (5), it is characterized in that the shaping mechanism (3) is used for opening the mouth of the packaging bag, the shaping mechanism (3) comprises a mechanical arm (301), a working platform, a pressing wheel (302), a second sucking disc (303), a slotting tool (304) and a rotating arm (305), the mechanical arm (301) is used for conveying the packaging bags to the working platform, the pinch roller (302) is used for driving the packaging bags to move on the working platform, the second sucker (303) is used for opening the opening of the packaging bag, the rotating arm (305) is C-shaped, the upper end of the rotating arm (305) is in transmission connection with the slotting tool (304), the lower end of the rotating arm is in rotation connection with the working platform, the slotting tool (304) is used for penetrating into the packaging bag to enable the packaging bag to be in a continuous opening state;

supply to be provided with detection mechanism (7) between bag mechanism (1), get bag mechanism (2), plastic mechanism (3), weighing machine structure (4) and sewing mechanism (5), detection mechanism (7) include a plurality of displacement sensor and photoelectric sensor, displacement sensing is connected with control system (6), control system (6) are used for supplying bag mechanism (1), get bag mechanism (2), plastic mechanism (3), weighing machine structure (4) and sewing mechanism (5) work in proper order according to detection mechanism (7) feedback signal control.

2. An automatic flour packaging production device control system according to claim 1, wherein the control system (6) comprises a PLC controller.

3. The automatic flour packaging production device control system according to claim 2, wherein the bag supply mechanism (1) comprises a workbench and a transmission belt, a baffle is arranged on one side of the workbench, the transmission belt is arranged at two ends of the workbench and used for dragging the packaging bags to move, a first driving motor is arranged on the transmission belt, a relay and a contactor are connected between the first driving motor and the PLC, and the first driving motor is connected with a power supply through a normally open contact of the contactor.

4. The control system of the automatic flour packing production device as claimed in claim 3, the bag taking mechanism (2) comprises a plurality of telescopic rods (202), a plurality of first sucking discs (203) and a turntable (201), the turntable (201) is circular, the lower end of the turntable (201) is fixed with the telescopic rod (202), the other end of the telescopic rod (202) is fixed with the first sucker (203), the number of the telescopic rod (202) corresponds to that of the first sucker (203), a second driving motor is arranged in the turntable (201), the second driving motor, the telescopic rod (202) and the first sucker (203) are connected with a frequency converter, the frequency converter is connected with a PLC controller through a DP bus, the lower end of the turntable (201) is provided with a displacement sensor, the displacement sensor is used for detecting the height of stacked packaging bags, and the output end of the displacement sensor is connected with the analog input port of the PLC.

5. The automatic flour packaging production device control system according to claim 4, wherein the weighing mechanism (4) comprises a charging barrel, a weighing platform and a pressure sensor, the charging barrel is of a hollow round platform structure with an upper end area larger than a lower end area, a solenoid valve is arranged at a small diameter end of the charging barrel, a relay and a contactor are arranged between the solenoid valve and the PLC, the solenoid valve is connected with a power supply through a normally open contact of the contactor, the weighing platform is arranged below the charging barrel, a photoelectric sensor is arranged on a table top of the weighing platform, the photoelectric sensor is applied to detecting a packaging bag position, the pressure sensor is arranged below the weighing platform, and the pressure sensor and the displacement sensor are respectively connected with an analog quantity input port of the PLC.

6. The control system of the automatic flour packaging production device is characterized in that a third driving motor is arranged on the mechanical arm (301), a photoelectric sensor is arranged at the position of a hand grip of the mechanical arm (301), and the photoelectric sensor is used for detecting the position of a packaging bag;

the pinch roller (302) and the second sucker (303) are symmetrically arranged along the working platform, the pinch roller (302) is provided with a fourth driving motor, and the second sucker (303) is provided with a photoelectric sensor;

a fifth driving motor is arranged between the slotting tool (304) and the rotating arm (305), and a sixth driving motor is arranged between the lower end of the rotating arm (305) and the working platform;

and the third driving motor, the fourth driving motor, the fifth driving motor and the sixth driving motor are all connected with frequency converters, and the frequency converters are connected with the PLC through DP buses.

7. The automatic flour packaging production device control system according to claim 6, wherein the sewing mechanism (5) comprises a sewing machine and a conveying platform, the cross section of the conveying platform is of a concave structure, the sewing machine is arranged on the upper portion of the conveying platform, a photoelectric sensor is arranged at the upper end of one side face of the conveying platform corresponding to the position of the sewing machine and used for detecting the position of a packaging bag, the photoelectric sensor is arranged in parallel with the sewing machine, a seventh driving motor is arranged on the conveying platform and connected with a relay and a contactor, the seventh driving motor is connected with a PLC through the relay, the relay is arranged between the PLC and the sewing machine, and the PLC controls the seventh driving motor and the sewing machine to work according to detection signals of the photoelectric sensor.

8. A flour automatic packaging production device control system according to claim 7, characterized in that the control system (6) adopts PID control.

9. The flour automatic packaging production device control system according to claim 8, wherein the PLC is connected with an upper computer and an HMI touch screen, the upper computer is used for modifying parameters of the PLC, and the upper computer and the HMI touch screen are communicated with the PLC through a DP bus.

Technical Field

The invention relates to the field of automatic control production, in particular to a control system of an automatic flour packaging production device.

Background

With the rapid development of science and technology, the continuous improvement of productivity level and the large-scale industrial application of intelligent equipment, people pay more and more attention to the improvement of working environment and intelligent production management, and the requirements on packaging quality and packaging efficiency in the industries such as food, chemical industry and the like are also increased, so that the rapid development of the production process of the packaging industry is initiated to adapt to the trend of modern large-scale production.

The existing manual packaging has the problems of low production efficiency, uneven quality, serious waste and the like, the production process can only be actually monitored on site by manpower, the running state of the production line cannot be automatically monitored in real time, the labor intensity of workers is increased, the production mode is low in monitoring level, the running cost of the production line is high, and great waste is caused on manpower and material resources.

The traditional flour packaging mechanical equipment mainly comprises mechanical equipment controlled by electricity, hydraulic pressure or pneumatic pressure. The flour packing machinery equipment has the advantages of simplicity, semi-automation and full automation, for example, a flour weighing and packing system disclosed in a patent with a patent publication number of CN105015807A named as 'a flour packing weighing system' is a semi-automatic control system, the precision of weighing, sewing and conveying during flour production cannot be guaranteed by adopting simple open-loop control, and production waste such as leakage is easily caused.

Disclosure of Invention

The invention provides a control system of an automatic flour packaging production device, aiming at solving the problems of low production efficiency and high production cost caused by low automation degree of flour packaging, wherein the control system is provided with a bag supply mechanism, a bag taking mechanism, a shaping mechanism, a weighing mechanism, a sewing mechanism and a control system, and adopts a PID control mode to ensure that each mechanism works orderly, so that the production efficiency is improved, and the production cost is saved.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a control system of an automatic flour packaging production device comprises a bag supplying mechanism, a bag taking mechanism, a shaping mechanism, a weighing mechanism and a sewing mechanism, wherein the shaping mechanism is used for opening a packaging bag opening, the shaping mechanism comprises a mechanical arm, a working platform, a pressing wheel, a second sucking disc, a slotting tool and a rotating arm, the mechanical arm is used for conveying a packaging bag to the working platform, the pressing wheel is used for driving the packaging bag to move on the working platform, the second sucking disc is used for opening the packaging bag opening, the rotating arm is C-shaped, the upper end of the rotating arm is in transmission connection with the slotting tool, the lower end of the rotating arm is in rotation connection with the working platform, and the slotting tool is used for penetrating into the packaging bag to enable;

the bag feeding mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism are provided with a detection mechanism therebetween, the detection mechanism comprises a plurality of displacement sensors and a photoelectric sensor, the displacement sensors are connected with a control system, and the control system is used for controlling the bag feeding mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism to work sequentially according to a feedback signal of the detection mechanism.

Further, the control system comprises a PLC controller.

Further, supply a bag mechanism to include workstation and drive belt, one side of workstation is provided with the baffle, the conveyer belt sets up in the workstation both ends, and the conveyer belt is used for dragging the wrapping bag and removes, is provided with a driving motor on the conveyer belt, be connected with relay and contactor between a driving motor and the PLC controller, a driving motor passes through the normally open contact connection power of contactor.

Further, get a bag mechanism and include a plurality of telescopic links, a plurality of first sucking disc and carousel, the carousel is circularly, and the lower extreme and the telescopic link of carousel are fixed, the other end and the first sucking disc of telescopic link are fixed, and the telescopic link corresponds with the quantity of first sucking disc, and the inside second driving motor that sets up of carousel, second driving motor and telescopic link and first sucking disc all are connected with the converter, the converter passes through DP bus connection PLC controller, the lower extreme of carousel sets up displacement sensing, displacement sensor is used for detecting the height that the wrapping bag was stacked, and displacement sensor's output and PLC controller's analog input port are connected.

Further, weighing mechanism includes feed cylinder, weighing platform and pressure sensor, the feed cylinder is the cavity round platform structure that upper end area is greater than the lower extreme area, and feed cylinder path end is provided with the solenoid valve, be provided with relay and contactor between solenoid valve and the PLC controller, the solenoid valve passes through contactor normally open contact and connects the power, weighing platform sets up in the feed cylinder below, and weighing platform's mesa sets up photoelectric sensor, photoelectric sensor is applied to and detects the wrapping bag position, pressure sensor sets up in weighing platform below, and pressure sensor and displacement sensor connect the analog input port of PLC controller respectively.

Further, the mechanical arm is provided with a third driving motor, a photoelectric sensor is arranged at the position of the gripper of the mechanical arm, and the photoelectric sensor is used for detecting the position of the packaging bag;

the pressing wheel and the second sucker are symmetrically arranged along the working platform, the pressing wheel is provided with a fourth driving motor, and the second sucker is provided with a photoelectric sensor;

a fifth driving motor is arranged between the slotting tool and the rotating arm, and a sixth driving motor is arranged between the lower end of the rotating arm and the working platform;

and the third driving motor, the fourth driving motor, the fifth driving motor and the sixth driving motor are all connected with frequency converters, and the frequency converters are connected with the PLC through DP buses.

Further, sew up the mechanism including sewing up ware and conveying platform, the transversal character cut in bas-relief structure of personally submitting of conveying platform sews up the ware and sets up in conveying platform upper portion, and conveying platform corresponds a side upper end of sewing up the ware position and is provided with photoelectric sensor, photoelectric sensor is used for detecting the wrapping bag position, photoelectric sensor and sews up ware parallel arrangement, the conveying platform is provided with seventh driving motor, seventh driving motor is connected with relay and contactor, and seventh driving motor passes through the relay and is connected with the PLC controller, be provided with the relay between PLC controller and the sewing up the ware, the PLC controller detects signal control seventh driving motor and sews up the ware work according to photoelectric sensor.

Further, the control system employs PID control.

Furthermore, the PLC is connected with an upper computer and an HMI touch screen, the upper computer is used for modifying parameters of the PLC, and the upper computer and the HMI touch screen are communicated with the PLC through a DP bus.

Through the technical scheme, the invention has the beneficial effects that:

the bag feeding mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism are arranged, the detection mechanism is arranged among the bag feeding mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism, the detection mechanism comprises a plurality of displacement sensors and photoelectric sensors, the displacement sensors are connected with a control system, and the control system is used for controlling the bag feeding mechanism, the bag taking mechanism, the shaping mechanism, the weighing mechanism and the sewing mechanism to work in sequence according to feedback signals of the detection mechanism. During the use, put into the flour wrapping bag and supply a bag mechanism, control system control supplies a bag mechanism to transport to getting a bag mechanism and getting a bag position piling up the wrapping bag, detection mechanism detects the wrapping bag position and makes through control system and get a bag operation that bag mechanism accomplishes, the wrapping bag transports to the plastic mechanism, control system carries out the opening and transports weighing machine with the wrapping bag after the opening to the wrapping bag through detection mechanism feedback signal control plastic mechanism, weighing machine packs the wrapping bag into according to the procedure with flour, at last, accomplish to sew up by sewing up the mechanism again, thereby realize the full automatic operation of flour packing, the production efficiency is improved, the loss in the packaging process has been reduced simultaneously, and the production cost is reduced.

Drawings

FIG. 1 is one of the working principle diagrams of the control system of the automatic flour packaging production device.

FIG. 2 is a second schematic diagram of the control system of the automatic flour packaging production device of the present invention.

FIG. 3 is a system schematic diagram of a control system of the automatic flour packaging production device.

FIG. 4 is one of the electrical schematic diagrams of the control system of the automatic flour packing production device of the invention.

FIG. 5 is a second electrical schematic diagram of the control system of the automatic flour packaging production device of the present invention.

FIG. 6 is a third electrical schematic diagram of a control system of the automatic flour packaging production device of the invention.

FIG. 7 is a control system IO wiring diagram of the control system of the automatic flour packaging production device.

FIG. 8 is a DP wiring diagram of a control system of the automatic flour packing production device.

The reference numbers in the drawings are as follows: 1 is for supplying bag mechanism, 2 is getting a bag mechanism, 3 is the plastic mechanism, 4 is weighing machine to be constructed, 5 is sewing mechanism, 6 is control system, 7 is detection mechanism, 201 is the carousel, 202 is the telescopic link, 203 is first sucking disc, 301 is the arm, 302 is the pinch roller, 303 is the second sucking disc, 304 is the slotting tool, 305 is the swinging boom.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings in which:

as shown in fig. 1 to 8, a control system of an automatic flour packaging production device comprises a bag supplying mechanism 1, a bag taking mechanism 2, a shaping mechanism 3, a weighing mechanism 4 and a sewing mechanism 5, wherein the shaping mechanism 3 is used for opening a bag opening of a package, the shaping mechanism 3 comprises a mechanical arm 301, a working platform, a pressing wheel 302, a second suction cup 303, a slotting tool 304 and a rotating arm 305, the mechanical arm 301 is used for conveying the package to the working platform, the pressing wheel 302 is used for driving the package to move on the working platform, the second suction cup 303 is used for opening the opening of the package, the rotating arm 305 is C-shaped, the upper end of the rotating arm 305 is in transmission connection with the slotting tool 304, the lower end of the rotating arm is in rotational connection with the working platform, and the slotting tool 304 is used for penetrating into the package to enable;

supply to be provided with detection mechanism 7 between bag mechanism 1, get bag mechanism 2, plastic mechanism 3, weighing mechanism 4 and the mechanism of sewing up 5, detection mechanism 7 includes a plurality of displacement sensor and photoelectric sensor, displacement sensor is connected with control system 6, control system 6 is used for supplying bag mechanism 1, gets bag mechanism 2, plastic mechanism 3, weighing mechanism 4 and the mechanism of sewing up 5 sequential workings according to detection mechanism 7 feedback signal control.

To optimize the product structure, the control system 6 comprises a PLC controller. In the embodiment, the PLC controller adopts an ohm dragon CJ2M type controller, which comprises a power supply module CJ1W-PA202, a CPU module CJ2M-CPU12, an interface module CP1H, a digital input module ID211, an analog input module ID232, output modules OD211, OD212 and OD 233.

In order to convey the wrapping bag that the sign indicating number is piled to getting a bag mechanism 2, supply bag mechanism 1 to include workstation and drive belt, one side of workstation is provided with the baffle, the conveyer belt sets up in the workstation both ends, and the conveyer belt is used for dragging the wrapping bag and removes, is provided with a driving motor on the conveyer belt, be connected with relay and contactor between a driving motor and the PLC controller, a driving motor passes through the normally open contact connection power of contactor.

Specifically, as shown in fig. 3 and 6, a first driving motor is labeled as M1, a corresponding contactor is labeled as KM1, and a corresponding relay is labeled as KA1, a coil of KA1 is connected with a PLC controller, a normally open contact of KA1 is connected with a coil of KM1, M1 is connected with a power supply through the normally open contact of KM1, the PLC controller enables the coil of KA1 to be powered on during work, so that the normally open contact of the coil of KM1 is powered on and closed, M1 is powered on to work, and the packed bags stacked by the conveyor belt work are conveyed to the lower end of the bag taking mechanism 2.

In order to facilitate the bag taking mechanism 2 to take a bag and convey the packaging bag to the shaping structure 3, the bag taking mechanism 2 comprises a plurality of telescopic rods 202, a plurality of first sucking discs 203 and a rotary disc 201, the rotary disc 201 is circular, the lower end of the rotary disc 201 is fixed with the telescopic rods 202, the other end of the telescopic rods 202 is fixed with the first sucking discs 203, the telescopic rods 202 correspond to the first sucking discs 203 in number, a second driving motor is arranged inside the rotary disc 201, the second driving motor, the telescopic rods 202 and the first sucking discs 203 are connected with a frequency converter, the frequency converter is connected with a PLC (programmable logic controller) through a DP (data bus), the lower end of the rotary disc 201 is provided with a displacement sensor, the displacement sensor is used for detecting the stacking height of the packaging bag, and the output end of the displacement sensor is.

Specifically, as shown in fig. 1 and 4, in the drawings, a second driving motor is labeled as M2, the second driving motor is used for driving the rotating disc 201 to rotate, the number of the telescopic rods 202 and the number of the first suction discs 203 are three, the three telescopic rods 202 are electric telescopic rods, and the three telescopic rods 202 are telescopic through forward and reverse rotation of the M21, the M22 and the M23 motors; the three first suction cups 203 correspond to three negative pressure fans M24, M25 and M26 respectively, the number of corresponding frequency converters in the bag taking mechanism 2 is 3, and the model of each frequency converter is Mitsubishi D700 FR-D740-0.4K-CHT; the PLC controller controls the bag taking mechanism 2 through a frequency converter.

For realizing that the flour is accurate to be weighed, weighing mechanism 4 includes feed cylinder, weighing platform and pressure sensor, the feed cylinder is the cavity round platform structure that upper end area is greater than the lower extreme area, and feed cylinder path end is provided with the solenoid valve, be provided with relay and contactor between solenoid valve and the PLC controller, the solenoid valve passes through contactor normally open contact and connects the power, weighing platform sets up in the feed cylinder below, and weighing platform's mesa sets up photoelectric sensor, photoelectric sensor is applied to and detects the wrapping bag position, pressure sensor sets up in weighing platform below, and pressure sensor and displacement sensor connect the analog input port of PLC controller respectively.

In the embodiment, the pressure sensor adopts a UNIPULSEF701 weighing display device; as shown in fig. 3 and 6, a contactor KM2 is connected to the solenoid valve, the solenoid valve is connected to the normally open contact of KM2, the coil of KM2 is connected to the normally open contact of the relay KA2, and the coil of the relay KA2 is connected to the PLC controller.

For shaping the packaging bag, the mechanical arm 301 is provided with a third driving motor, and a photoelectric sensor is arranged at the position of a gripper of the mechanical arm 301 and used for detecting the position of the packaging bag;

the pinch roller 302 and the second sucker 303 are symmetrically arranged along the working platform, the pinch roller 302 is provided with a fourth driving motor, and the second sucker 303 is provided with a photoelectric sensor;

a fifth driving motor is arranged between the slotting tool 304 and the rotating arm 305, and a sixth driving motor is arranged between the lower end of the rotating arm 305 and the working platform;

and the third driving motor, the fourth driving motor, the fifth driving motor and the sixth driving motor are all connected with frequency converters, and the frequency converters are connected with the PLC through DP buses.

Specifically, as shown in fig. 5, the third driving motor is labeled M3, the third driving motor is used for transmission of the mechanical arm 301, the fourth driving motor is labeled M4, the fourth driving motor is used for dragging the pressing wheel 302 to rotate, the second suction cup 303 includes two negative pressure fans M31 and M32, the fifth driving motor is labeled M5, the fifth driving motor is used for driving the slotting tool 304 to rotate, the sixth driving motor is labeled M6, the sixth driving motor is used for rotating the rotating arm 305, the number of the corresponding frequency converters is 4, and the type of the frequency converter is mitsubishi D700 FR-D740-0.4K-CHT; the PLC controller controls the shaping mechanism 3 through a frequency converter.

For the wrapping bag is accurate targets in place, sew up mechanism 5 including sewing up ware and conveying platform, the transversal character cut in bas-relief structure of personally submitting of conveying platform, the ware of sewing up sets up in conveying platform upper portion, and conveying platform corresponds a side upper end of sewing up the ware position and is provided with photoelectric sensor, photoelectric sensor is used for detecting the wrapping bag position, photoelectric sensor and sews up ware parallel arrangement, the conveying platform is provided with seventh driving motor, seventh driving motor is connected with relay and contactor, and seventh driving motor passes through the relay and is connected with the PLC controller, be provided with the relay between PLC controller and the ware of sewing up, the PLC controller detects signal control seventh driving motor and sews up the ware work according to photoelectric sensor.

Specifically, as shown in fig. 3 and 6, the seventh driving motor is labeled M7, the corresponding contactor is labeled KM3, and the corresponding relay is labeled KA3, the coil of KA3 is connected with the PLC controller, the normally open contact of KA3 is connected with the coil of KM3, the M7 is connected with the power supply through the normally open contact of KM3, the PLC controller energizes the coil of KA3 during operation, so that the normally open contact of KM3 is energized to be closed, the M7 is energized to operate to drive the conveying platform to place the mounted flour in the stitching device and to stitch the flour by the stitching device, the stitching device motor is connected with the PLC controller through the relay KA4 and the contactor KM4, and the wiring mode is the same as the wiring mode of M7.

For convenience of control, the PLC is connected with an upper computer and an HMI touch screen, the upper computer is used for modifying parameters of the PLC, the upper computer and the HMI touch screen are communicated with the PLC through a DP bus, an upper computer monitoring and management system is set up in the upper computer based on configuration king software, and the HMI touch screen adopts a touch screen with the model of MT8150 iE.

When automatic flour packaging operation is carried out, stacked packaging bags are placed on a workbench of a bag supply mechanism, a displacement sensor is arranged on the lower portion of a rotary disc 201 of a bag taking mechanism 2, when the lower portion of the rotary disc 201 cannot detect the packaging bags, a PLC (programmable logic controller) enables an M1 to work through KA1, the M1 drives a conveyor belt to move the stacked packaging bags to the lower portion of the rotary disc 201, signals of the displacement sensor change at the moment, the PLC controls the M1 to stop the machine, meanwhile, a baffle blocks inertial displacement of the packaging bags, and the packaging bags are stored to the lower portion of the rotary disc 201;

then the PLC controller controls the bag taking mechanism 2 to operate according to the signal of the displacement sensor, the telescopic rod 202 operates through the frequency converter to extend to the upper part of the packaging bag, the first sucking disc 203 acts to suck up the packaging bag, wherein the PLC controller controls the telescopic rod 202 to operate in a PID mode according to the feedback signal to match the stacking height of the packaging bag because the displacement sensor continuously detects the stacking height of the packaging bag, and when the stacking of the packaging bag is taken out by the bag taking mechanism 2, the PLC controller starts the M1 again according to the signal of the displacement sensor to continuously convey the packaging bag; after the first suction disc 203 acts, the turntable 201 acts and deflects to send the packaging bag to the operation range of the shaping mechanism 3;

the wrapping bag is detected to the arm 301 photoelectric sensor of plastic mechanism 3, press from both sides the wrapping bag tightly, the PLC controller makes M3 action through the converter, arm 301 sends the wrapping bag to pinch roller 302 position, M4 work, pinch roller 302 rotates conveys the wrapping bag to second sucking disc 303 position, second sucking disc position photoelectric sensor action, two negative-pressure air blowers of second sucking disc 303 symmetry set up in the wrapping bag from top to bottom, second sucking disc 303 is opened the wrapping bag opening, M5 drive slotting tool 304 deflects and stretches into inside the wrapping bag this moment, the wrapping bag is propped open completely, M6 drive swinging boom 305 moves slotting tool 304 and wrapping bag to 4 operation ranges of weighing machine structure, wherein arm 301, wheel 302, second sucking disc 303, slotting tool 304 and swinging boom 305 all adopt PID control.

Then, the packaging bag is moved to a weighing platform, a photoelectric sensor light beam arranged on the weighing platform is blocked by a flour bag, the output of the photoelectric sensor is changed into a low-level PLC controller to control an electromagnetic valve to be electrified and opened, flour flows into the packaging bag from a charging barrel, a pressure sensor detects the weight of the flour, when the weight reaches a set value, the PLC controller controls the electromagnetic valve to be closed, and the weighing of the flour in a single bag is completed; and finally, M7 works to drive the conveying platform to place the packaged flour at the position below the stitching instrument, when the flour packaging bag moves to the position below the stitching instrument, the signal of a photoelectric sensor arranged on the conveying platform is blocked, the PLC controls M7 to stop, and meanwhile, the PLC controls the stitching instrument to stitch the flour packaging bag, so that the automatic flour packaging operation is completed.

The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications in the structure, features and principles described in the present invention should be included in the claims of the present invention.