CN113879630A

CN113879630A - Electric-assisted heating ultrasonic sealing machine and working method thereof

Info

Publication number: CN113879630A
Application number: CN202111361107.5A
Authority: CN
Inventors: 孟跃; 郜法军; 张杉
Original assignee: Xi'an Ziping Machinery Automation Co ltd
Current assignee: Xi'an Ziping Machinery Automation Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-01-04

Abstract

The invention relates to the technical field of full-automatic packaging equipment, in particular to an electric auxiliary heating ultrasonic sealing machine and a working method thereof. The problem that the existing packaging process is low in working efficiency and incapable of realizing full-automatic packaging is solved. The invention is used for heat-sealing the inner film of the woven bag with the inner lining film, when the upper opening of the packing bag filled with materials is fed into the electric auxiliary heat ultrasonic sealing machine, the upper opening of the packing bag is clamped by two belts of the electric auxiliary heat ultrasonic sealing machine to move forwards, an electric heater heats and preheats the part of the upper opening of the packing bag needing to be sealed in the advancing process, when the packing bag reaches between an ultrasonic welding head and an ultrasonic pinch roller, the ultrasonic welding head seals the inner film of the packing bag, the pressure of the ultrasonic pinch roller and the energy of the ultrasonic welding head are controlled well, and the perfect sealing of the inner film is better realized and the inner film is not adhered to the outer woven bag.

Description

Electric-assisted heating ultrasonic sealing machine and working method thereof

Technical Field

The invention relates to the technical field of packaging equipment, in particular to an electric auxiliary heating ultrasonic sealing machine and a working method thereof.

Background

The packaging form that present packing easy moisture absorption material adopted is mostly braided bag + inside lining membrane bag, after the wrapping bag dress material, earlier put into the braided bag with the artifical tying of inside lining membrane bag, then artifical supplementary with the braided bag hem seam allowance, because the packaging mode is injectd, this kind of packaging form can only be accomplished by semi-automatic packaging machine, accomplish the bagging-off bag by the manual work, put into the braided bag after the artifical tying of inside lining membrane bag in, artifical supplementary completion braided bag hem seam package work, if the material is corrosivity or smell great, harm to the human body is very serious, it is very difficult to find this position's staff at the present that people's health consciousness increases, and accomplish work efficiency lowly through the manual work, and the shape after accomplishing is various non-uniform.

The pure ultrasonic heat sealing machine sold in the market at present is not a vertical sealing machine like a household sewing machine, and has the key problems that the strength of a sealing heat sealing line cannot meet the requirement, the amplitude and the energy of ultrasonic waves are difficult to adjust, the fatigue of a film material of the heat sealing line rubbed by the ultrasonic waves is damaged, and the strength of the heat sealing line cannot meet the requirement;

in order to ensure that the inner film of the packaging bag can be hot-melted and bonded, the pure electric heating heat-sealing machine sold in the market at present controls the electric heating temperature to be about 170 ℃ generally, and moreover, the heater and the packaging bag are in contact type, the heating section is also longer, so that the outer bag of the packaging bag is extremely easy to scald.

Although there are various forms of inner membrane bag heat sealing machines in the market at present, most of them exist in independent equipment, and after the packaging bag is packaged, the inner membrane bag sealing work needs to be completed by manual assistance, so that the inner membrane bag sealing machine cannot be perfectly connected with a full-automatic packaging machine, and the work efficiency is low.

Disclosure of Invention

In view of the above, the invention provides an electric auxiliary heating ultrasonic sealing machine and a working method thereof, aiming at solving the problems that the existing packaging is low in working efficiency and cannot realize full-automatic packaging.

In order to solve the problems in the prior art, the technical scheme of the invention is as follows: the electric-assisted heat ultrasonic sealing machine comprises two parallel conveying belt wheel supports, a rack is arranged on each conveying belt wheel support, a counter gear box is fixedly arranged at the upper part of the rack, and a motor speed reducer is connected to each counter gear box; the frame is respectively connected with a first turning connecting rod and a second turning connecting rod through a pin shaft of the first turning connecting rod to form a rotating shaft joint, the lower ends of the first turning connecting rod and the second turning connecting rod are arranged on one of the conveyer belt wheel brackets, and a tension spring is arranged between the middle parts of the first turning connecting rod and the second turning connecting rod and the frame;

two ends of the bottom of the pair of conveying belt wheel brackets are respectively provided with 2 groups of driving conveying belt wheels and driven conveying belt wheels, the 2 groups of driving conveying belt wheels and the driven conveying belt wheels are connected through two conveying belts respectively, and two output shafts of the counter gear box are connected with the shafts of the two driving conveying belt wheels through a pair of telescopic universal couplings respectively; the method is characterized in that:

the upper surfaces of the pair of conveying belt wheel brackets are also provided with a pair of packaging bag protection plates vertical to the conveying belt wheel brackets, the outer sides of the packaging bag protection plates are provided with electric heaters, the electric heaters are controlled by an electric heating controller, and the distance between the two electric heaters is 5-10 mm;

the rack is also provided with an ultrasonic generator and an ultrasonic pinch roller mechanism, one end of the ultrasonic generator is provided with an ultrasonic generator welding head, and an ultrasonic pinch roller of the ultrasonic pinch roller mechanism presses on the ultrasonic generator welding head; a synchronous belt is arranged between a driven synchronous belt wheel on an ultrasonic pinch roller shaft of the ultrasonic pinch roller mechanism and a brake synchronous belt wheel at the middle part of the telescopic universal coupling, a cylinder fixing support is further fixed at the front end of the conveying belt wheel support, a blowing nozzle cylinder is fixed on the cylinder fixing support, a blowing nozzle is fixedly arranged on a piston rod of the blowing nozzle cylinder, the outer sides of two packaging bag protection plates at the lower end of the blowing nozzle are respectively provided with a suspension suction head, and the blowing nozzle and the two suspension suction heads are arranged on a straight line.

Furthermore, a synchronous belt pressing wheel is further arranged in the middle of the synchronous belt and fixed on the turning connecting rod I.

Furthermore, the two conveying belt wheel supports are of inverted strip-shaped plates with L-shaped sections, two sides of one end of each strip-shaped plate are respectively provided with a driving conveying belt wheel bearing seat, a shaft of a driving conveying belt wheel penetrates through the driving conveying belt wheel bearing seats to be fixed and form a rotating shaft joint, and the other end of each conveying belt wheel support is used for fixing a driven conveying belt wheel through a driven conveying belt wheel shaft and forming a rotating shaft joint.

Furthermore, the conveyer belt is a multi-wedge belt or a chain.

Further, the ultrasonic pinch roller mechanism is a rotating shaft pinch roller mechanism or a linear pinch roller mechanism;

further, the rotating shaft pinch roller mechanism comprises a pinch roller bracket and an ultrasonic pinch roller which are arranged up and down; a pinch roller bearing seat, an L-shaped pinch roller adjusting wheel fixing plate and a rotating shaft bearing seat; a hand wheel adjusting mechanism or an air cylinder adjusting mechanism is arranged on the pressing wheel adjusting wheel fixing plate and used for adjusting the pressure between the ultrasonic pressing wheel and an ultrasonic generator welding head, a pressing wheel bearing seat is clamped and fixed on a rotating shaft in a rotating shaft bearing seat by a pressing wheel bearing seat fixing plate, the shaft of the ultrasonic pressing wheel penetrates through the pressing wheel bearing seat to be fixed to form a rotating shaft joint, a driven synchronous belt wheel is fixed on the upper part of the shaft of the ultrasonic pressing wheel, and a pressure spring is arranged between the adjusting hand wheel and the pressing wheel bearing seat A;

further, the linear pinch roller mechanism comprises a pinch roller bracket, a linear slide block and an ultrasonic pinch roller; the ultrasonic wave pressing wheel device is characterized in that a linear sliding block is fixed on the pressing wheel support, a linear sliding rail is arranged on the middle lower portion of the linear sliding block and can do linear motion, a pressing wheel bearing seat is fixed at one end of the linear sliding rail, a shaft of the ultrasonic wave pressing wheel penetrates through the pressing wheel bearing seat to be fixed and form a rotating shaft joint, a driven synchronous belt wheel is fixed on the upper portion of the ultrasonic wave pressing wheel, and a spring adjusting mechanism or an air cylinder adjusting mechanism is arranged at the tail end of the pressing wheel support and used for adjusting the pressure between the ultrasonic wave pressing wheel and a welding head of an ultrasonic wave generator.

The working method of the electric auxiliary heating ultrasonic sealing machine is characterized in that: the method comprises the following steps: the packaging bag with the materials is conveyed to an electric auxiliary heating ultrasonic sealing machine in a standing position, a conveying belt arranged at the lower end of a conveying belt wheel support of the sealing machine is dragged by a driving conveying belt wheel to form contra-rotating, a clamping force exists between the contact surfaces of two contra-rotating conveying belts under the action of a tensioning spring, the upper opening of the packaging bag can be clamped to move forwards, when the packaging bag passes through the position of a blowing nozzle, the upper opening of the packaging bag is sucked by a suspension suction head, the blowing nozzle is inserted into the upper opening of the packaging bag to blow under the action of a blowing nozzle cylinder, dust adhered to the inner surface in the packaging process is blown cleanly so as to be thermally sealed, the packaging bag passes through two electric heaters which are symmetrically arranged in the moving forwards process, the part of the upper opening of the packaging bag needing to be thermally sealed is preheated through hot air or thermal radiation, the heating temperature is 80-100 ℃, when the packaging bag moves forwards between an ultrasonic generator welding head and an ultrasonic pinch roller, and carrying out heat sealing on the inner film of the packaging bag by ultrasonic waves, and carrying out edge folding and opening sewing on the heat-sealed packaging bag by a full-automatic packaging machine to finish packaging.

Compared with the prior art, the invention has the following advantages:

1) compared with the traditional electric heating sealing machine, the electric heating section required by the traditional electric heating sealing machine is longer because the electric heating is heat conduction heating, the heat is conducted to the inner film for a certain time from the outside, in addition, the electric heating temperature cannot be too high so as to avoid scalding the outer bag, but the temperature cannot be too low so as to reach the bonding temperature of the inner film bag, the heating section of the electric heating sealing machine is provided with two contra-rotating high-temperature belts, the electric heating machine is easy to damage by rubbing with a heating plate during working, the equipment needs longer preheating time to balance the working temperature when being started every time, the electric heater of the invention is hot air or heat radiation, the heating speed is high, the equipment can work when being started, the equipment does not need preheating, the temperature of the electric heater can be adjusted, the temperature range is wide and easy to set, an ultrasonic wave generator is adopted, the ultrasonic wave heat sealing generates heat through material friction and molecular vibration, the heat sealing is realized through internal heating, the damage to the surface of the outer bag is small, the outer surface quality of the outer bag after heat sealing is good; the invention preheats the packaging bag in advance through electric heating, the packaging bag becomes soft when passing through the ultrasonic welding head, thus the packaging bag is not easy to be fatigued and damaged, in addition, the packaging bag is hot, the ultrasonic amplitude and energy required by heat sealing are smaller, the fatigue and damage are further reduced, and the strength of a heat sealing line can meet the requirement.

2) The invention has the advantages of few easily-damaged parts, low failure rate, stable work and easy adjustment in work.

3) The invention is specially designed for a full-automatic packaging machine, is suitable for conveying and sealing packaging bags in a standing position, can be directly used when being installed in the full-automatic packaging machine, and does not need manual assistance;

drawings

FIG. 1 is a view of an electric assisted thermal ultrasonic sealer;

FIG. 2 is a schematic view of the ultrasonic generator;

FIG. 3 is a structural diagram of a spring pressing wheel mechanism of a rotating shaft of the electric auxiliary heating ultrasonic sealing machine;

FIG. 4 is a structural diagram of a rotating shaft cylinder pressing wheel mechanism of the electric auxiliary heating ultrasonic sealing machine;

FIG. 5 is a structural diagram of a linear slide rail spring pressing wheel mechanism of the electric auxiliary heating ultrasonic sealing machine;

FIG. 6 is a structural diagram of a linear slide rail cylinder pressing wheel mechanism of the electric auxiliary heating ultrasonic sealing machine.

Description of the labeling: 1. a frame; 2. a motor reducer; 3. an ultrasonic generator; 4. aligning the gear box; 5. a telescopic universal coupling; 6. a driving conveyor belt wheel bearing seat; 7. a driving conveyor belt wheel; 8. a conveyor belt; 9. a driving synchronous pulley; 10. a synchronous belt; 11. a synchronous belt pinch roller; 12. turning over the first connecting rod; 13. an ultrasonic pinch roller mechanism; 14. turning over the second connecting rod; 15. a conveyor belt pulley support; 16. an electric heater; 17. an electric heating controller; 18. a passive conveyor belt pulley; 19. a passive conveyor belt pulley shaft; 20. protecting the board of the packaging bag; 21. suspending the suction head; 22. a purge nozzle; 23. purging the nozzle cylinder; 24. a cylinder fixing bracket; 25. turning over the connecting rod shaft pin; 26. a passive synchronous pulley;

3-1, an ultrasonic generator case; 3-2, welding heads of ultrasonic generators; 1

13A-1, a pinch roller bracket A; 13A-2, a pinch roller adjusting wheel fixing plate; 13A-3, locking nuts of pressure price-adjusting hand wheels; 13A-4, a pressure adjusting hand wheel A; 13A-5, a pressure spring A; 13A-6, an ultrasonic pinch roller A; 13A-7, a pinch roller bearing seat A; 13A-8, a pressure wheel bearing fixing plate A; 13A-9, a rotating shaft bearing seat A; 13A-10, a gap adjusting bolt A;

13B-1, a pinch roller bracket B; 13B-2, a pinch roller cylinder fixing plate; 13B-3, a pinch roller cylinder B; 13B-4, a gap adjusting nut B; 13B-5, a pinch roller cylinder piston rod B; 13B-6, an ultrasonic pinch roller B; 13B-7, a pinch roller bearing seat B; 13B-8, a pressure wheel bearing fixing plate B; 13B-9, a rotating shaft bearing seat B;

13C-1, a pinch roller bracket C; 13C-2, a press wheel bearing seat C; 13C-3, an ultrasonic pinch roller C; 13C-4, a linear slide block C; 13C-5, a linear slide rail C; 13C-6 and a pressure spring C; 13C-7, a pressure adjusting hand wheel C; 13C-8, a gap adjusting bolt C; 13C-9, a gap adjusting bolt and a locking nut;

13D-1, a pinch roller bracket D; 13D-2, a press wheel bearing seat D; 13D-3, an ultrasonic pinch roller D; 13D-4, a linear slide block D; 13D-5, a linear slide rail D; 13D-6, a pinch roller cylinder piston rod locking nut D; 13D-7, a pinch roller cylinder piston rod D; 13D-8 and a gap adjusting nut D; 13D-9 and a pinch roller cylinder D.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides an electric auxiliary heating ultrasonic sealing machine, which comprises a rack 1, a motor speed reducer 2, an ultrasonic generator 3, a counter gear box 4, a telescopic universal coupling 5, a driving conveying belt wheel bearing seat 6, a driving conveying belt wheel 7, a conveying belt 8, a driving synchronous belt wheel 9, a synchronous belt 10, a synchronous belt pinch roller 11, a turning connecting rod I12, an ultrasonic pinch roller mechanism 13, a turning connecting rod II 14, a conveying belt wheel support 15, an electric heater 16, an electric heating controller 17, a driven conveying belt wheel 18, a driven conveying belt wheel shaft 19, a packaging bag protective plate 20, a suspension suction head 21, a purging nozzle 22, a purging nozzle cylinder 23, a cylinder fixing support 24, a turning connecting rod shaft pin 25 and a driven synchronous belt wheel 26, wherein the motor speed reducer is arranged on the rack 1;

the two conveying belt wheel supports 15 are of inverted strip-shaped plates with L-shaped sections, the two conveying belt wheel supports 15 are arranged side by side and in parallel, a rack 1 is arranged on each conveying belt wheel support 15, a counter gear box 4 is fixed on the upper portion of the rack, a motor speed reducer 2 is connected on the upper portion of the counter gear box 4, one side of the rack 1 is connected with a turning connecting rod I12 and connected with a turning connecting rod II 14 through a turning connecting rod pin shaft 25 to form a rotatable shaft joint, the lower ends of the turning connecting rod I12 and the turning connecting rod II 14 are fixed with another conveying belt wheel support 15 which is symmetrically arranged, tensioning springs 27 are respectively arranged between the turning connecting rod I12 and the turning connecting rod II 14 and the rack 1, a driving conveying belt wheel bearing seat 6 is fixed at the rear end of each conveying belt wheel support 15, a shaft of a driving conveying belt wheel 7 penetrates through the driving belt wheel bearing seat 6 to be fixed and form a rotating shaft joint, a driven conveying belt wheel 18 is fixed at the front end of each conveying belt wheel support 15 through a driven conveying belt wheel shaft 19 to form a rotating shaft joint, a conveying belt 8 is arranged between a driving conveying belt wheel 7 and a driven conveying belt wheel 18, two output shafts of a counter gear box 4 are connected with the shafts of the two driving conveying belt wheels 7 through a telescopic universal coupling 5, a packaging bag protection plate 20 is also arranged on a conveying belt wheel support 15, an electric heater 16 is arranged on the outer side of the packaging bag protection plate 20, a 5-10mm wide gap is reserved on the opposite surface of the two electric heaters 16, an electric heating controller 17 is fixed at the front end of the electric heater 16, an ultrasonic generator 3 is also fixed on one side of the rear end of a rack 1, an ultrasonic generator welding head 3-2 is arranged at one end of the ultrasonic generator 3, an ultrasonic pinch roller mechanism 13 is also fixed on the other side of the rear end of the rack 1, an ultrasonic pinch roller of the ultrasonic pinch roller mechanism 13 is pressed on the ultrasonic generator welding head 3-2, and a driving synchronous belt wheel 9 is arranged on the telescopic universal coupling 5, the driving synchronous belt wheel 9 and the driven synchronous belt wheel 26 are connected by a synchronous belt 10, the driven synchronous belt wheel 26 is fixed on an ultrasonic pinch roller shaft of an ultrasonic pinch roller mechanism 13, a synchronous belt pinch roller 11 is further arranged in the middle of the synchronous belt 10, the synchronous belt pinch roller 11 is fixed on a turning connecting rod I12, a cylinder fixing support 24 is further fixed at the front end of a conveying belt wheel support 15, a blowing nozzle cylinder 23 is fixed on the cylinder fixing support 24, a blowing nozzle 22 is fixed on a piston rod of the blowing nozzle cylinder 23, and suspension suction heads 21 are arranged on packaging bag protection plates 20 on two sides of the blowing nozzle 22.

The ultrasonic pressing wheel mechanism 13 has four forms, namely a rotating shaft A spring pressing wheel mechanism, a rotating shaft B cylinder pressing wheel mechanism, a linear slide rail C spring pressing wheel mechanism and a linear slide rail D cylinder pressing wheel mechanism;

the structure of the rotating shaft pressure spring pressing wheel mechanism is as shown in fig. 3: a pinch roller adjusting wheel fixing plate 13A-2 and a rotating shaft bearing seat A13A-9 are fixed on a pinch roller bracket A13A-1, a pressure adjusting hand wheel A13A-4 is arranged on the pinch roller adjusting wheel fixing plate 13A-2, a pressure adjusting hand wheel locking nut 13A-3 is arranged on an adjusting hand wheel A13A-4, a pinch roller bearing seat A13A-7 is clamped and fixed on a rotating shaft in a rotating shaft bearing seat A13A-9 by a pinch roller bearing seat fixing plate A13A-8, the shaft of an ultrasonic pinch roller A13A-6 penetrates through the pinch roller bearing seat A13A-7 to be fixed to form a rotating shaft joint, a driven synchronous pulley 26 is fixed on the upper part of the shaft of the ultrasonic pinch roller A13A-6, and a pressure spring A13A-5 is arranged between the adjusting hand wheel A13A-4 and the pinch roller bearing seat A13A-7;

the structure of the rotating shaft cylinder pressing wheel mechanism is shown in figure 4: a pinch roller cylinder fixing plate 13B-2 and a rotating shaft bearing seat B13B-9 are fixed on a pinch roller bracket B13B-1, a pinch roller cylinder B13B-3 is fixed on the pinch roller cylinder fixing plate 13A-2, a pinch roller bearing seat B13B-7 is clamped and fixed on a rotating shaft in a rotating shaft bearing seat B13B-9 by a pinch roller bearing seat fixing plate B13B-8, the shaft of an ultrasonic pinch roller B13B-6 penetrates through the pinch roller bearing seat B13B-7 to be fixed to form a rotating shaft joint, a driven synchronous belt pulley 26 is fixed on the upper part of the shaft of the ultrasonic pinch roller B13B-6, a pinch roller cylinder piston rod B13B-5 is pressed against the pinch roller bearing seat B13B-7, and a gap adjusting nut B13B-4 is arranged at the tail end of a pinch roller cylinder piston rod B13B-5 to adjust the extension length of the piston rod.

The structure of the linear slide rail spring pressing wheel mechanism is shown in fig. 5: a linear sliding block C13C-4 is fixed on the pinch roller bracket C13C-1, a linear sliding rail C13C-5 is arranged at the middle lower part of the linear sliding block C13C-4, the linear sliding rail C13C-5 can do linear motion, a pinch roller bearing seat C13C-2 is fixed at one end of the linear sliding rail C13C-5, a shaft of an ultrasonic pinch roller C13C-3 penetrates through the pinch roller bearing seat C13C-2 to be fixed and form a rotating shaft joint, a driven synchronous pulley 26 is further fixed at the upper part of the ultrasonic pinch roller C13C-3, a pressure adjusting hand wheel C13C-7 is arranged at the tail end of the pinch roller bracket C13C-1, a pressure spring C13C-6 is arranged between the pressure adjusting hand wheel C13C-7 and the linear sliding rail C13C-5, and a gap adjusting bolt C13C-8 is further arranged between the tail end of the pinch roller bracket C13C-1 and the linear sliding rail C13C-5;

the structure of the linear slide rail spring pressing wheel mechanism is shown in fig. 6: a linear sliding block D13D-4 is fixed on a pinch roller bracket D13C-1, a linear sliding rail D13D-5 is arranged at the middle lower part of the linear sliding block D13D-4, the linear sliding rail D13D-5 can do linear motion, a pinch roller bearing seat D13D-2 is fixed at one end of the linear sliding rail D13D-5, a shaft of an ultrasonic pinch roller D13D-3 penetrates through the pinch roller bearing seat D13D-2 to be fixed and form a rotating shaft joint, a driven synchronous pulley 26 is further fixed at the upper part of the ultrasonic pinch roller D13D-3, a pinch roller cylinder D13D-9 is fixed at the tail end of the pinch roller bracket D13D-1, a pinch roller cylinder piston rod D13D-7 is pressed on the pinch roller bearing seat D, and a gap adjusting nut D is further arranged at the tail part of the pinch roller cylinder piston rod D13D-7 and used for adjusting the extension length of the pinch roller cylinder piston rod D13D-7.

The working method of the invention is as follows:

the packaging bag with the materials is conveyed to an electric auxiliary heating ultrasonic sealing machine in a standing position, a conveying belt 8 arranged at the lower end of a conveying belt wheel support 15 of the sealing machine is dragged by a driving conveying belt wheel 7 to form contrarotation, a clamping force exists between the contact surfaces of two contrarotating conveying belts 8 under the action of a tensioning spring 27, the upper opening of the packaging bag can be clamped to move forwards, when the packaging bag passes through the position of a blowing nozzle 22, the upper opening of the packaging bag is sucked open by a suspension suction head 21, the blowing nozzle 22 is inserted into the upper opening of the packaging bag under the action of a blowing nozzle cylinder 23 to blow, dust adhered to the inner surface in the packaging process is blown clean so as to be thermally sealed, the packaging bag passes through two electric heaters 16 which are symmetrically arranged in the moving process, the parts of the upper opening of the packaging bag needing to be thermally sealed are preheated by hot air or thermal radiation, the heating moving temperature is 80-100 ℃, when the packaging bag is between a welding head 3-2 of an ultrasonic generator and an ultrasonic pressing wheel mechanism 13, and carrying out heat sealing on the inner film of the packaging bag by ultrasonic waves, and carrying out edge folding and opening sewing on the heat-sealed packaging bag by a full-automatic packaging machine to finish packaging.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The electric-assisted heat ultrasonic sealing machine comprises two conveying belt wheel supports (15) which are arranged side by side and in parallel, wherein a rack (1) is arranged on each conveying belt wheel support (15), a counter gear box (4) is fixedly arranged at the upper part of each rack (1), and a motor speed reducer (2) is connected to each counter gear box (4); the frame (1) is respectively connected with a turning connecting rod I (12) and a turning connecting rod II (14) through a turning connecting rod pin shaft (25) to form a rotating shaft joint, the lower ends of the turning connecting rod I (12) and the turning connecting rod II (14) are arranged on one of the conveying belt wheel supports (15), and a tension spring (27) is arranged between the middle parts of the turning connecting rod I (12) and the turning connecting rod II (14) and the frame (1);

two ends of the bottom of the pair of conveying belt wheel supports (15) are respectively provided with 2 groups of driving conveying belt wheels (7) and driven conveying belt wheels (18), the 2 groups of driving conveying belt wheels (7) and the driven conveying belt wheels (18) are connected through two conveying belts (8), and two output shafts of the pair of gear boxes (4) are respectively connected with shafts of the two driving conveying belt wheels (7) through a pair of telescopic universal couplings (5); the method is characterized in that:

the upper surfaces of the pair of conveying belt wheel brackets (15) are also provided with a pair of packaging bag protection plates (20) vertical to the conveying belt wheel brackets, the outer sides of the packaging bag protection plates (20) are provided with electric heaters (16), the electric heaters (16) are controlled by an electric heating controller (17), and the distance between the two electric heaters (16) is 5-10 mm;

the rack (1) is also provided with an ultrasonic generator (3) and an ultrasonic pinch roller mechanism (13), one end of the ultrasonic generator (3) is provided with an ultrasonic generator welding head (3-2), and an ultrasonic pinch roller of the ultrasonic pinch roller mechanism (13) is pressed on the ultrasonic generator welding head (3-2); a synchronous belt (10) is arranged between a driven synchronous belt wheel (26) on an ultrasonic press wheel shaft of an ultrasonic press wheel mechanism (13) and a brake synchronous belt wheel (9) in the middle of a telescopic universal coupling (5), an air cylinder fixing support (24) is further fixed at the front end of a conveying belt wheel support (15), a purging nozzle air cylinder (23) is fixed on the air cylinder fixing support (24), a purging nozzle (22) is fixedly arranged on a piston rod of the purging nozzle air cylinder (23), suspension suction heads (21) are respectively arranged on the outer sides of two packaging bag protection plates (20) at the lower end of the purging nozzle (22), and the purging nozzle (22) and the two suspension suction heads (21) are arranged on the same straight line.

2. The electrically assisted thermal ultrasonic sealer of claim 1, wherein: the middle part of the synchronous belt (10) is also provided with a synchronous belt pinch roller (11), and the synchronous belt pinch roller (11) is fixed on a turning connecting rod I (12).

3. The electrically assisted thermal ultrasonic sealer according to claim 1 or 2, wherein: the two conveying belt wheel supports (15) are of inverted strip-shaped plates with L-shaped sections, driving conveying belt wheel bearing seats (6) are arranged on two sides of one end of each strip-shaped plate respectively, shafts of driving conveying belt wheels (7) penetrate through the driving conveying belt wheel bearing seats (6) to be fixed and form rotating shaft joints, and driven conveying belt wheels (18) are fixed and form rotating shaft joints at the other ends of the conveying belt wheel supports (15) through driven conveying belt wheel shafts (19).

4. The electrically assisted thermal ultrasonic sealer of claim 3, wherein: the conveyer belt (8) is a multi-wedge belt or a chain.

5. The electrically assisted thermal ultrasonic sealer of claim 4, wherein: the ultrasonic pinch roller mechanism (13) is a rotating shaft pinch roller mechanism or a linear pinch roller mechanism.

6. The electrically assisted thermal ultrasonic sealer of claim 5, wherein: the rotating shaft pinch roller mechanism comprises a pinch roller bracket and an ultrasonic pinch roller which are arranged up and down; a pinch roller bearing seat, an L-shaped pinch roller adjusting wheel fixing plate and a rotating shaft bearing seat; a hand wheel adjusting mechanism or an air cylinder adjusting mechanism is arranged on the pressing wheel adjusting wheel fixing plate and used for adjusting the pressure between the ultrasonic pressing wheel and an ultrasonic generator welding head, a pressing wheel bearing is clamped and fixed on a rotating shaft in a rotating shaft bearing seat through a pressing wheel bearing seat fixing plate, the shaft of the ultrasonic pressing wheel penetrates through the pressing wheel bearing seat to be fixed to form a rotating shaft joint, a driven synchronous belt wheel (26) is fixed to the upper portion of the shaft of the ultrasonic pressing wheel, and a pressure spring is arranged between the adjusting hand wheel and the pressing wheel bearing seat A.

7. The electrically assisted thermal ultrasonic sealer of claim 5, wherein: the linear pinch roller mechanism comprises a pinch roller bracket, a linear slide block and an ultrasonic pinch roller; the ultrasonic wave pressing wheel device is characterized in that a linear sliding block is fixed on the pressing wheel support, a linear sliding rail is arranged at the middle lower part of the linear sliding block and can do linear motion, a pressing wheel bearing seat is fixed at one end of the linear sliding rail, a shaft of the ultrasonic wave pressing wheel penetrates through the pressing wheel bearing seat to be fixed and form a rotating shaft joint, a driven synchronous belt wheel (26) is fixed at the upper part of the ultrasonic wave pressing wheel, and a spring adjusting mechanism or an air cylinder adjusting mechanism is arranged at the tail end of the pressing wheel support and used for adjusting the pressure between the ultrasonic wave pressing wheel and a welding head of an ultrasonic wave generator.

8. The method of claim 1, wherein the step of operating the electric-assisted thermal ultrasonic sealer comprises: the method comprises the following steps: the packaging bag containing materials is conveyed to an electric auxiliary heat ultrasonic sealing machine in a standing position, a conveying belt (8) arranged at the lower end of a conveying belt wheel support (15) of the sealing machine is dragged by a driving conveying belt wheel (7) to form counter-rotation, a clamping force exists on the contact surfaces of two counter-rotating conveying belts (8) under the action of a tension spring (27), the upper opening of the packaging bag can be clamped to move forwards, when the packaging bag passes through a blowing nozzle (22), a suspension suction head (21) sucks the upper opening of the packaging bag open, the blowing nozzle (22) is inserted into the upper opening of the packaging bag under the action of a blowing nozzle cylinder (23) to blow, dust adhered to the inner surface in the packaging process is blown cleanly to be thermally sealed, the packaging bag passes through two electric heaters (16) which are symmetrically arranged in the advancing process, and the parts of the upper opening of the packaging bag, which need to be thermally sealed, are preheated by hot air or thermal radiation, the heating temperature is 80-100 ℃, when the packaging bag moves forward to a position between a welding head (3-2) of an ultrasonic generator and an ultrasonic pinch roller (13), the inner film of the packaging bag is thermally sealed by ultrasonic waves, and the packaging bag after thermal sealing is folded and seamed by a full-automatic packaging machine to finish packaging.