CN221914908U - Automatic bag opening and sealing machine - Google Patents

Abstract

The utility model discloses an automatic bag opening and sealing machine, which relates to the technical field of bag opening and sealing, and comprises a frame, a bag outlet assembly, a supporting assembly, a bag opening and sealing assembly, a label pasting assembly, a label outlet device, a hopper structure and a sliding rack structure, wherein the bag outlet assembly, the supporting assembly, the bag opening and sealing assembly, the label pasting assembly, the hopper structure and the sliding rack structure are arranged on one side of the bag outlet assembly along the X axis direction, the hopper structure is arranged above the bag opening and sealing assembly, the label pasting assembly and the label outlet device are arranged on the other side of the bag outlet assembly along the X axis direction, the label pasting assembly and the label outlet device are connected through a label pasting connecting plate, the supporting assembly is arranged below the bag outlet assembly, one end of the sliding rack structure is arranged in the frame, and the other end of the sliding rack structure penetrates through the frame to be connected with the bag opening and sealing assembly. The whole bag sealing operation flow is automatically carried out, and the automatic bag sealing machine has the advantages of being high in automation degree, high in working efficiency, capable of reducing cost, improving yield and the like.

Description

Automatic bag opening and sealing machine

Technical Field

The utility model relates to the technical field of bag opening and sealing, in particular to an automatic bag opening and sealing machine.

Background Art

The packaging of bagged products is currently carried out in a semi-automatic way, that is, using a semi-automatic packaging machine. First, the operator sticks the label output by the labeling equipment on the bag, then the operator opens the packaging bag mouth, puts the product into the self-sealing bag, and then puts the bag mouth containing the product on the hot pressing equipment for heat sealing. This process has very low production efficiency and is still highly dependent on manpower. The labor cost is high, and it is easy for labels to be missed and they are also easy to fall off during bagging, affecting the entire production progress.

Therefore, in view of this, the existing structural deficiencies are studied and improved, and an automatic bag opening and sealing mechanism is proposed.

Utility Model Content

The utility model aims to provide an automatic bag opening and sealing machine, aiming to solve the above technical problems. The utility model automatic bag opening and sealing machine has the advantages of high automation, high work efficiency, reduced labor costs and improved yield rate.

In order to achieve the above object, the utility model is implemented through the following technical solutions:

An automatic bag opening and sealing machine comprises a frame and a bag discharging component, a supporting component, a bag opening and sealing component, a labeling component, a labeling device, a hopper structure and a sliding rack structure installed on the frame, wherein the bag opening and sealing component and the hopper structure are both located on one side of the bag discharging component along the X-axis direction, the hopper structure is located above the bag opening and sealing component, the labeling component and the labeling device are both located on the other side of the bag discharging component along the X-axis direction, the labeling component and the labeling device are connected by a labeling connecting plate, the supporting component is located below the bag discharging component, one end of the sliding rack structure is located in the frame, and the other end thereof passes through the frame and is connected to the bag opening and sealing component.

Furthermore, the bag opening and sealing assembly includes a bag opening hook, a first rotating cylinder and a plurality of suction nozzles, the first rotating cylinder is symmetrically mounted on the first outer shell, a rotating rod is connected between the output ends of the two first rotating cylinders, the bag opening hook is mounted on the rotating rod, and the suction nozzle is mounted in the first outer shell and is located on one side of the bag opening hook.

Furthermore, the bag opening and sealing assembly also includes a tightening hook, a second rotating cylinder and a heating device. The second rotating cylinder is installed on a second outer shell, the second outer shell is connected to the frame and is located on the outer side of the hopper structure along the Y-axis direction, the output end of the second rotating cylinder is connected to the tightening hook, and the heating device is located on one side of the suction nozzle along the X-axis direction and is connected to the bag outlet assembly.

Furthermore, the sliding rack structure includes a sliding rack, a guide block, a rotating propulsion shaft, a first synchronous belt structure and a first driving motor that drives the first synchronous belt structure to operate. One end of the sliding rack is fixedly connected to the first shell, the lower surface of the sliding rack is provided with a gear portion, and the upper surface thereof is provided with a guide groove. The guide block is fixed in the frame, and the guide block is adapted to the guide groove. The rotating propulsion shaft is connected to the frame, and both ends of the rotating propulsion shaft are provided with rotating gears, and the rotating gears are meshed and connected with the gear portion of the sliding rack. One end of the first synchronous belt structure is connected to the rotating propulsion shaft.

Furthermore, the bag outlet assembly includes a bag slide, an upper tensioning roller, a lower tensioning roller, a second synchronous belt structure and a second drive motor for driving the second synchronous belt structure. Both ends of the upper tensioning roller are connected to the frame through lifting screws, one end of the lower tensioning roller is connected to the second synchronous belt structure, and the bag slide is located above the heating device.

Furthermore, the bag output assembly also includes a bag support plate, a first roller, a second roller, a lifting structure, a third roller and a material roll. Both ends of the bag support plate, both ends of the first roller, both ends of the third roller and both ends of the material roll are connected to the frame, one end of the second roller is connected to the lifting structure, and the lifting structure is located in the frame. The packaging bags output from the material roll pass through the third roller, the second roller, the first roller and the bag support plate in sequence, and are output to the bag slide plate through the tension between the upper tensioning roller and the lower tensioning roller.

Furthermore, it also includes a printing base, a fixed baffle, a first slide rail slider structure, a second slide rail slider structure and a conveying module, both ends of the printing base are connected to the frame, the lower end of the fixed baffle is connected to the printing base, the first slide rail slider structure and the second slide rail slider structure are both connected to one side of the fixed baffle, the slider of the first slide rail slider structure is connected to the labeling device, the slider of the second slide rail slider structure is connected to the labeling connecting plate, the conveying module is fixed on the conveying module fixing seat below, the conveying module fixing seat is fixedly connected to the frame, and one end of the conveying module is connected to the labeling connecting plate.

Furthermore, the labeling assembly includes a labeling transverse support plate, a labeling cylinder, a slide cylinder, a slide connecting plate and a label suction plate. The labeling cylinder is fixed on the labeling transverse support plate, the labeling transverse support plate is fixedly connected to the labeling connecting plate, the output end of the labeling cylinder is connected to the slide connecting plate, the lower end of the slide connecting plate is connected to the slide cylinder, the slide cylinder is fixed on the slide cylinder support seat below, and the lower end of the slide cylinder support seat is connected to the label suction plate.

Furthermore, the support assembly includes a front sealing plate, a lower support plate for the bag, a first driving cylinder and a plurality of lower support plate support members, the front sealing plate is connected to the frame and is located under the bag slide plate, the lower support plate support members are arranged on the outer side of the front sealing plate in an inclined state, the first driving cylinder is fixed to the inner side of the front sealing plate through a connecting member, a first rotating member is provided at one end of the lower support plate of the bag, and the output end of the first driving cylinder passes through the front sealing plate and is connected to the first rotating member.

Furthermore, the hopper structure includes a hopper, a rotating support plate, a second driving cylinder and a second rotating member, the second rotating member is arranged on an outer side wall of the hopper, one end of the rotating support plate is connected to the frame, and the other end thereof is connected to the second rotating member, the second driving cylinder is fixed to the frame, and the output end of the second driving cylinder is connected to the other outer side wall of the hopper.

The utility model automatic bag opening and sealing machine has the following beneficial effects:

The utility model discloses an automatic bag opening and sealing machine. The label discharging device delivers label paper printed with commodity information. The labeling component sticks the label paper on the bag. Then the bag is transported to the bag slide plate through the bag discharging component. The bag slides to the rack structure to drive the bag opening and sealing component to open the bag mouth. The product falls into the bag from the hopper structure. At this time, the support component supports the bag. Then the rack structure slides to reset, driving the bag opening and sealing component to heat-seal the bag. Finally, the bag discharging component rolls up the unopened bag to cut off the bag that has been filled with the product. The support component slowly rotates the packaged bag until it falls into the next process or storage box. The automatic bag opening and sealing process can be completed. The work efficiency is high, the manual operation is reduced, and the yield rate is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the automatic bag opening and sealing machine of the utility model;

FIG2 is a schematic structural diagram of the bag discharging assembly, the supporting assembly, the bag opening and sealing assembly, the sliding rack structure and the hopper structure shown in FIG1 ;

FIG3 is a schematic structural diagram of a partial structure of the bag discharging assembly, the support assembly, the bag opening and sealing assembly, the sliding rack structure and the hopper structure shown in FIG2 ;

FIG4 is a schematic diagram of another visual structure shown in FIG3 ;

FIG. 5 is a schematic structural diagram of the labeling assembly and labeling device shown in FIG. 1 .

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with embodiments and drawings.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and/or" used herein includes any and all combinations of one or more related listed items.

As shown in Figures 1 and 5, an automatic bag opening and sealing machine includes a frame 1 and a bag outlet component 2, a support component 3, a bag opening and sealing component 4, a labeling component 5, a labeling device 6, a hopper structure 7 and a sliding rack structure 8 installed on the frame 1, the bag opening and sealing component 4 and the hopper structure 7 are both located on one side of the bag outlet component 2 along the X-axis direction, the hopper structure 7 is located above the bag opening and sealing component 4, the labeling component 5 and the labeling device 6 are both located on the other side of the bag outlet component 2 along the X-axis direction, the labeling component 5 and the labeling device 6 are connected by a labeling connecting plate 500, the support component 3 is located below the bag outlet component 2, one end of the sliding rack structure 8 is located in the frame 1, and the other end thereof passes through the frame 1 and is connected to the bag opening and sealing component 4.

It should be noted that the label paper printed with product information is delivered by the labeling device 6, the labeling component 5 sticks the label paper on the bag, and then the bag is output through the bag output component 2, slides to the rack structure 8 to drive the bag opening and sealing component 4 to open the bag mouth, and the product falls into the bag from the hopper structure 7. At this time, the support component 3 supports the bag; then it slides to the rack structure 8 to reset, driving the bag opening and sealing component 4 to heat-seal the bag, and finally the bag output component 2 rolls up the unopened bag to cut off the bag that has been filled with the product, and the support component 3 slowly rotates the packaged bag until it falls into the next process or storage box, thereby completing the automatic bag opening and sealing process, with high work efficiency, reduced manual operation, and improved yield rate.

As shown in FIG3 , the bag opening and sealing assembly 4 includes a bag opening hook 400, a first rotary cylinder 401 and a plurality of suction nozzles (not shown), wherein the first rotary cylinder 401 is symmetrically mounted on a first housing 402, a rotating rod is connected between the output ends of the two first rotary cylinders 401, the bag opening hook 400 is mounted on the rotating rod, and the suction nozzle is mounted in the first housing 402 and is located at one side of the bag opening hook 400. The suction nozzle may be a vacuum suction nozzle.

It should be noted that the labeled bag is output through the bag delivery conveyor assembly and falls, and then the sliding rack structure 8 drives the bag opening hook 400 to move along the X-axis direction, so that the suction nozzle adsorbs the bag opening for preliminary opening. At this time, the first rotating cylinder 401 drives the bag opening hook 400 to rotate downward and hook the bag, and then the sliding rack structure 8 drives it to continue to move forward along the X-axis direction, so that the bag opening hook 400 can further expand the packaging bag opening. After the product falls into the bag from the hopper structure 7, the first rotating cylinder 401 drives the bag opening hook 400 to reset, and the sliding rack structure 8 resets so that the bag opening is close to the heat-sealed opening of the heating device.

As shown in Fig. 3 and Fig. 4, the bag opening and sealing assembly 4 further includes a pressing hook 403, a second rotary cylinder and a heating device 404. The second rotary cylinder is mounted on a second housing 405. The second housing 405 is connected to the frame 1 and is located outside the hopper structure 7 along the Y-axis direction. The output end of the second rotary cylinder is connected to the pressing hook 403. The heating device 404 is located on one side of the suction nozzle along the X-axis direction and is connected to the bag outlet assembly 2. The heating device 404 is provided with a heating strip silicone bottom plate, a silicone fixing plate, a heating wire connection block, a heating bottom plate and a heat-sealing intermediate bridge plate.

It should be noted that, after the product falls into the bag, it slides toward the rack structure 8 to reset, driving the bag opening to close to the heating device 404 for heat sealing. At the same time, the second rotary cylinder drives the tightening hook 403 to rotate to tightly press the two sides of the bag. Then the bag outlet assembly 2 rolls up the unopened bag to cut off the bag that has been filled with the product. The function of the tightening hook 403 is to facilitate the separation of the bags and prevent the two sides of the bags from warping.

As shown in Fig. 3 and Fig. 4, the sliding rack structure 8 includes a sliding rack 800, a guide block 801, a rotating propulsion shaft 802, a first synchronous belt structure 803 and a first driving motor driving the first synchronous belt structure 803 to operate. One end of the sliding rack 800 is fixedly connected to the first housing 402. The lower surface of the sliding rack 800 is provided with a gear portion 804, and the upper surface thereof is provided with a guide groove. The guide block 801 is fixed in the frame 1, and the guide block 801 is adapted to the guide groove. The rotating propulsion shaft 802 is connected to the frame 1. Both ends of the rotating propulsion shaft 802 are provided with rotating gears 805, and the rotating gears 805 are meshed and connected with the gear portion 804 of the sliding rack 800. One end of the first synchronous belt structure 803 is connected to the rotating propulsion shaft 802. The design of the sliding rack structure 8 makes the process of opening and sealing bags more stable and has high working efficiency.

As shown in Figures 2 to 4, the bag outlet assembly 2 includes a bag slide 200, an upper tensioning roller 201, a lower tensioning roller 202, a second synchronous belt structure 203 and a second drive motor that drives the second synchronous belt structure 203 to operate. Both ends of the upper tensioning roller 201 are connected to the frame 1 through lifting screws 204, one end of the lower tensioning roller 202 is connected to the second synchronous belt structure 203, and the bag slide 200 is located above the heating device 404. The bag discharging assembly 2 also includes a bag supporting plate 205, a first roller 206, a second roller 207, a lifting structure 208, a third roller 209 and a material roll 210. Both ends of the bag supporting plate 205, both ends of the first roller 206, both ends of the third roller 209 and both ends of the material roll 210 are connected to the frame 1. One end of the second roller 207 is connected to the lifting structure 208. The lifting structure 208 is located in the frame 1. A plurality of first sensors 211 are provided on the lifting structure 208. The packaging bags output by the material roll 210 pass through the third roller 209, the second roller 207, the first roller 206 and the bag supporting plate 205 in sequence, and are output to the bag slide plate 200 through the tension between the upper tensioning roller 201 and the lower tensioning roller 202.

It should be noted that the bag discharging assembly 2 also includes a material roll conveying motor 212 for driving the material roll 210 to operate and a lifting motor for driving the lifting structure 208 to operate;

The bag discharging assembly 2 further includes a rotating blowing member 213, both ends of which are connected to the frame 1, and the rotating blowing member 213 is located above the upper tensioning roller 201;

The lifting screw 204 and the lifting structure 208 facilitate adjustment of the distance between the upper tensioning roller 201 and the lower tensioning roller 202 to accommodate bags of different thicknesses; the lifting structure 208 facilitates adjustment of the tensioning force of the bag.

As shown in FIG5 , the labeling device 6 is a common label printer, which will not be described in detail. A waste material collection roll 600 and a waste material collection roll driving motor 601 for driving the waste material collection roll 600 are provided on one side of the labeling device 6 , and an air blowing pipe 608 is provided on the other side.

As shown in Figure 5, it also includes a printing base 602, a fixed baffle 603, a first slide rail slider structure 604, a second slide rail slider structure 605 and a conveying module 606. Both ends of the printing base 602 are connected to the frame 1, the lower end of the fixed baffle 603 is connected to the printing base 602, the first slide rail slider structure 604 and the second slide rail slider structure 605 are both connected to one side of the fixed baffle 603, the slider of the first slide rail slider structure 604 is connected to the labeling device 6, the slider of the second slide rail slider structure 605 is connected to the labeling connecting plate 500, the conveying module 606 is fixed on the conveying module fixing seat 607 below, the conveying module fixing seat 607 is fixedly connected to the frame 1, and one end of the conveying module 606 is connected to the labeling connecting plate 500.

It should be noted that the arrangement of the conveying module 606, the first slide rail slider structure 604 and the second slide rail slider structure 605 can enable the labeling device 6 and the labeling component 5 to move along the X-axis direction, so as to complete the labeling operation stably and efficiently.

As shown in Fig. 1 and Fig. 5, the labeling assembly 5 includes a labeling transverse support plate 501, a labeling cylinder 502, a slide cylinder 503, a slide connecting plate 504 and a label suction plate 505, wherein the labeling cylinder 502 is fixed on the labeling transverse support plate 501, the labeling transverse support plate 501 is fixedly connected to the label connecting plate 500, the output end of the labeling cylinder 502 is connected to the slide connecting plate 504, the lower end of the slide connecting plate 504 is connected to the slide cylinder 503, the slide cylinder 503 is fixed on the slide cylinder support seat 506 below, and the lower end of the slide cylinder support seat 506 is connected to the label suction plate 505. The label suction plate 505 of this embodiment can be a vacuum adsorption plate.

It should be noted that the labeling cylinder 502 can drive the label suction plate 505 to move up and down along the Z axis, and the slide cylinder 503 can drive the label suction plate 505 to move along the X axis, so as to complete the labeling operation by sticking the label on the bag after sucking out the label.

As shown in Fig. 3 and Fig. 4, the support assembly 3 includes a front sealing plate 300, a bag lower support plate 301, a first driving cylinder 302 and a plurality of lower support plate support members 303. The front sealing plate 300 is connected to the frame 1 and is located below the bag slide plate 200. The lower support plate support member 303 is arranged on the outside of the front sealing plate 300 in an inclined state. The first driving cylinder 302 is fixed to the inside of the front sealing plate 300 through a connecting member. A first rotating member is provided at one end of the bag lower support plate 301. The output end of the first driving cylinder 302 passes through the front sealing plate 300 and is connected to the first rotating member. The bag lower support plate 301 can prevent the bag from falling when the bag is loaded and sealed.

As shown in Fig. 2 and Fig. 3, the hopper structure 7 includes a hopper 700, a rotating support plate 701, a second driving cylinder 702, a second rotating member 703 and a second sensor 704. The second rotating member 703 is arranged on an outer side wall of the hopper 700. One end of the rotating support plate 701 is connected to the frame 1, and the other end thereof is connected to the second rotating member 703. The second driving cylinder 702 is fixed to the frame 1, and the output end of the second driving cylinder 702 is connected to the other outer side wall of the hopper 700. The hopper 700 is a rotatable hopper 700, and the size of the hopper 700 mouth can be adjusted, and the adaptability is strong.

The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any technician familiar with the profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the scope of the technical solution of the utility model, which are all equivalent embodiments of the utility model. At the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims (10)

1. An automatic bag opening and sealing machine which is characterized in that: including frame and the play bag subassembly, supporting component, the opening bag seal subassembly of installing in the frame, paste mark subassembly, play mark device, hopper structure and slide to rack structure, it all is located one side of opening the bag subassembly along X axis direction to open bag seal subassembly and hopper structure, hopper structure is located and opens bag seal subassembly top, paste mark subassembly and go out the mark device and all be located the opposite side of opening the bag subassembly along X axis direction, paste the mark subassembly and go out and connect through paste the mark connecting plate between the mark device, supporting component is located out bag subassembly below, slide to rack structure's one end is located the frame, and its other end passes the frame and opens the bag and seal the subassembly and be connected.

2. The automatic bag sealer as claimed in claim 1 wherein: the bag opening and sealing assembly comprises a bag opening hook, a first rotary cylinder and a plurality of suction nozzles, wherein the first rotary cylinders are symmetrically arranged on a first shell, a rotating rod is connected between the output ends of the two first rotary cylinders, the bag opening hook is arranged on the rotating rod, and the suction nozzles are arranged in the first shell and are positioned on one side of the bag opening hook.

3. The automatic bag sealer as claimed in claim 2 wherein: the bag opening and sealing assembly further comprises a tight supporting hook, a second rotary cylinder and a heating device, wherein the second rotary cylinder is arranged on the second shell, the second shell is connected with the frame and located on the outer side of the hopper structure along the Y-axis direction, the output end of the second rotary cylinder is connected with the tight supporting hook, and the heating device is located on one side of the suction nozzle along the X-axis direction and connected with the bag discharging assembly.

4. The automatic bag sealer as claimed in claim 3, wherein: the sliding rack structure comprises a sliding rack, a guide block, a rotary pushing shaft, a first synchronous belt structure and a first driving motor for driving the first synchronous belt structure to operate, one end of the sliding rack is fixedly connected with a first shell, the lower surface of the sliding rack is provided with a gear part, the upper surface of the sliding rack is provided with a guide groove, the guide block is fixed in a frame, the guide block is matched with the guide groove, the rotary pushing shaft is connected with the frame, rotating gears are arranged at two end parts of the rotary pushing shaft, the rotating gears are meshed with the gear part of the sliding rack, and one end of the first synchronous belt structure is connected with the rotary pushing shaft.

5. The automatic bag sealer as claimed in claim 4 wherein: the bag discharging assembly comprises a bag sliding plate, an upper tensioning roller, a lower tensioning roller, a second synchronous belt structure and a second driving motor for driving the second synchronous belt structure to operate, wherein two ends of the upper tensioning roller are connected with the frame through lifting screws, one end of the lower tensioning roller is connected with the second synchronous belt structure, and the bag sliding plate is located above the heating device.

6. The automatic bag sealer as claimed in claim 5, wherein: the bag discharging assembly comprises a bag supporting plate, a first roller, a second roller, a lifting structure, a third roller and a material roll, wherein two ends of the bag supporting plate, two ends of the first roller, two ends of the third roller and two ends of the material roll are connected with a frame, one end of the second roller is connected with the lifting structure, the lifting structure is located in the frame, and a packaging bag which is output by the material roll sequentially passes through the third roller, the second roller, the first roller and the bag supporting plate and then is output to a bag sliding plate through tension between an upper tensioning roller and a lower tensioning roller.

7. The automatic bag sealer as defined in claim 6 wherein: still including printing base, fixed stop, first slide rail slider structure, second slide rail slider structure and transport module, the both ends and the frame of printing the base are connected, the lower extreme of fixed stop is connected with the printing base, first slide rail slider structure and second slide rail slider structure all are connected with a side of fixed stop, the slider of first slide rail slider structure is connected with out the mark device, the slider of second slide rail slider structure is connected with subsides mark connecting plate, transport module is fixed on the transport module fixing base of below, transport module fixing base and frame fixed connection, the one end of transport module is connected with subsides mark connecting plate.

8. The automatic bag sealer as claimed in claim 7 wherein: the label assembly comprises a label transverse supporting plate, a label cylinder, a sliding table connecting plate and a label absorbing plate, wherein the label cylinder is fixed on the label transverse supporting plate, the label transverse supporting plate is fixedly connected with the label connecting plate, the output end of the label cylinder is connected with the sliding table connecting plate, the lower end of the sliding table connecting plate is connected with the sliding table cylinder, the sliding table cylinder is fixed on a sliding table cylinder supporting seat below, and the lower end of the sliding table cylinder supporting seat is connected with the label absorbing plate.

9. The automatic bag sealer as claimed in claim 8 wherein: the supporting assembly comprises a front sealing plate, a bag bottom plate, a first driving air cylinder and a plurality of bottom plate supporting pieces, wherein the front sealing plate is connected with the frame and located below the bag sliding plate, the bottom plate supporting pieces are arranged on the outer side of the front sealing plate in an inclined state, the first driving air cylinder is fixed on the inner side of the front sealing plate through a connecting piece, one end of the bag bottom plate is provided with a first rotating piece, and the output end of the first driving air cylinder penetrates through the front sealing plate and is connected with the first rotating piece.

10. The automatic bag sealer as claimed in claim 1 wherein: the hopper structure is including hopper, rotatory backup pad, second drive cylinder and second rotation piece, the second rotates the piece setting on an lateral wall of hopper, rotatory backup pad's one end is connected with the frame, and its other end is connected with the second rotation piece, the second drive cylinder is fixed in the frame, the output of second drive cylinder is connected with another lateral wall of hopper.