CN109229565B

CN109229565B - Double-film bag-forming type automatic packaging machine and automatic packaging process thereof

Info

Publication number: CN109229565B
Application number: CN201811017956.7A
Authority: CN
Inventors: 章胜华; 石舜; 王波
Original assignee: Shenzhen Sinvo Automatic Co Ltd
Current assignee: Shenzhen Sinvo Automatic Co Ltd
Priority date: 2018-09-03
Filing date: 2018-09-03
Publication date: 2023-09-22
Anticipated expiration: 2038-09-03
Also published as: CN109229565A

Abstract

The invention discloses a double-film bag-forming type automatic packaging machine and an automatic packaging process thereof, wherein the double-film bag-forming type automatic packaging machine comprises a lower film rolling mechanism, an upper film rolling mechanism, a bag body pulling mechanism, a three-side heat sealing mechanism, a bag clamping mechanism, a bag cutting mechanism, a side cutting mechanism, a bag opening mechanism, a sealing mechanism and a pushing mechanism, and strip films led out by the lower film rolling mechanism and the upper film rolling mechanism are overlapped up and down; the bag body pulling mechanism clamps the end part of one side of the strip-shaped film which is overlapped up and down; the three-side heat sealing mechanism continuously thermally seals three sides of the strip-shaped film; the bag clamping mechanism clamps the inner side part of the outer end bag body, and the bag cutting mechanism cuts the outer end bag body from the strip-shaped film; the side edge of the bag body is cut in order by the side edge cutting mechanism; the bag opening mechanism opens the bag opening of the bag body, and the product on the pushing mechanism is pushed into the bag body through the bag opening; the sealing mechanism seals the bag mouth of the bag body in a heat sealing way. The invention can realize the production of the packaging bag and the packaging of the kit.

Description

Double-film bag-forming type automatic packaging machine and automatic packaging process thereof

Technical Field

The invention relates to the field of mechanical automation, in particular to a double-film bag-forming type automatic packaging machine and an automatic packaging process thereof.

Background

The package is the general names of containers, materials, auxiliary objects and the like used according to a certain technical method, and the products are protected in the circulation process, are convenient to store and promote sales; also means that in the process of adopting the container, materials and auxiliary substances, certain technical methods and other operation activities are applied to achieve the aim; packaging is a very important process in industrial production processes. The package comprises manual package and automatic package according to the technological mode, and can be divided into bag package, box package and the like according to the package material; for small products, such as a kit used in the medical field, when the kit needs to be packaged singly, a plastic packaging bag is generally adopted as a packaging carrier, and the packaging bag is bonded after the single kit is packaged in the single plastic packaging bag so as to achieve the packaging purpose; conventional packaging mode enterprises generally purchase produced packaging bags from suppliers, and the products are directly placed into the packaging bags through manual or automatic equipment during packaging; the following disadvantages exist in this way: 1. the packaging bag needs to be obtained in a purchasing mode, so that the packaging cost is increased; 2. in the actual production process, the products with different sizes and shapes have different requirements on the sizes and the materials of the packaging bags, the purchased sizes and materials of the packaging bags cannot be automatically adapted according to the actual use requirements, and the production adaptability is poor; 3. the existing single automatic packaging equipment cannot solve the automatic packaging procedures of film pulling superposition, film clamping, three-side heat sealing, bag cutting, side cutting, bag opening, product bagging, sealing and the like; and the packaging productivity is lower; 4. the production package for the medical kit (with a plurality of liquid injection cavities arranged side by side, which can be used for extracting various different specimens such as blood, urine, saliva and the like in the physical examination process) does not have special automatic packaging equipment at present, the existing packaging productivity is extremely low and only can reach 400pcs/h, so that the automatic packaging equipment is designed and developed to meet the development of the industry and the market demands.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the double-film bag-forming type automatic packaging machine and the automatic packaging process thereof, which are integrated with the automatic packaging procedures of film drawing lamination, film clamping, three-side heat sealing, bag cutting, side cutting, bag opening, product bagging, sealing and the like of the medical kit, and simultaneously realize the production of the packaging bag and the packaging of the kit, and have compact packaging procedures and can improve the productivity to 800 pcs/h.

The technical scheme adopted by the invention is as follows: the double-film bag-forming type automatic packaging machine comprises a lower film rolling mechanism, an upper film rolling mechanism, a bag body pulling mechanism, a three-side heat sealing mechanism, a bag clamping mechanism, a bag cutting mechanism, a side cutting mechanism, a bag opening mechanism, a sealing mechanism and a pushing mechanism, wherein the lower film rolling mechanism and the upper film rolling mechanism are respectively arranged at the lower part and the upper part of a frame, and strip films led out by the lower film rolling mechanism and the upper film rolling mechanism are overlapped up and down; the bag body pulling mechanism is arranged on the frame along the guiding-out direction of the strip-shaped film, clamps the end part of one side of the strip-shaped film which is overlapped up and down, and pulls the end part to the outside; the three-side heat sealing mechanism is arranged at one side of the output end of the strip-shaped film, and three sides of the strip-shaped film are continuously heat-sealed and closed through the three-side heat sealing mechanism after the overlapped strip-shaped film is pulled out to the three-side heat sealing mechanism, so that a plurality of continuously arranged bag bodies are formed on the strip-shaped film; the bag clamping mechanism and the bag cutting mechanism are sequentially arranged at one side of the three-side heat sealing mechanism at intervals, and after the bag body at the outer end of the strip-shaped film is pulled to the bag cutting mechanism, the bag clamping mechanism clamps the inner side part of the bag body at the outer end, and the bag cutting mechanism cuts the bag body at the outer end from the strip-shaped film; the side edge cutting mechanism is arranged at one side of the bag cutting mechanism, and after the bag body is cut off from the strip-shaped film, the bag body pulling mechanism clamps the bag body and continuously moves the bag body to the side edge cutting mechanism, and the side edge of the bag body is cut neatly through the side edge cutting mechanism; the bag opening mechanism, the sealing mechanism and the pushing mechanism are respectively arranged at one side of the side cutting mechanism, after the bag body is conveyed to the bag opening mechanism by the bag body pulling mechanism, the bag body is loosened, the bag opening mechanism clamps the bag body, the bag opening of the bag body is opened, and a product on the pushing mechanism is pushed into the bag body through the bag opening; the sealing mechanism seals the bag mouth of the bag body filled with the product B in a heat sealing way; after the bag opening is closed, the bag body pulling mechanism returns to the bag clamping mechanism, and the strip-shaped film at the bag clamping mechanism is clamped and pulled out to be packaged next time.

Preferably, the bag body pulling mechanism comprises a linear module, a pulling motor, a pulling screw rod, a clamping cylinder, an upper clamping plate and a lower clamping plate, wherein the linear module is of a strip structure and is arranged on the frame in a linear manner along the guiding-out direction of the strip-shaped film; the pull-out screw rod is rotatably arranged in the linear module; the pull-out motor is arranged at one end of the linear module, and the output end of the pull-out motor is connected with the pull-out screw rod and drives the pull-out screw rod to rotate; the clamping cylinder is arranged on one side of the linear module, the side wall of the clamping cylinder is connected with a pull-out screw rod seat sleeved on the pull-out screw rod, and when the pull-out screw rod rotates, the pull-out screw rod seat drives the clamping cylinder to linearly slide along the direction of the pull-out screw rod; the upper clamping plate and the lower clamping plate are respectively connected to the output end of the clamping cylinder, and the clamping cylinder drives the upper clamping plate and the lower clamping plate to move relatively along the vertical direction so as to clamp the end part of one side of the strip-shaped film, and the strip-shaped film is driven by the pull-out motor to move linearly along the direction of the linear module.

Preferably, the three-side heat sealing mechanism comprises a support, a heat sealing cylinder, a heat sealing push rod, a support plate, a lower heat sealing seat, an upper heat sealing seat and a heat sealing strip, wherein the support is arranged on the frame and positioned at one side of the outwards extending strip-shaped film, and the side wall of the support is arranged towards the direction of the strip-shaped film; the heat-sealing air cylinder is arranged on the side wall of the support, and the output end of the heat-sealing air cylinder is upwards arranged; the heat sealing push rod is vertically connected to the output end of the heat sealing cylinder and driven by the heat sealing cylinder to move up and down; the support plate is horizontally connected to the heat sealing push rod and extends to the upper part of the strip-shaped film; the lower heat sealing seat is arranged at the lower part of the heat sealing cylinder and extends to the lower part of the strip-shaped film; the upper heat seal seat is fixed at the lower part of the support plate, the upper heat seal seat and the lower heat seal seat are vertically spaced at the upper side and the lower side of the strip-shaped film, and the upper heat seal seat moves up and down along with the support plate; the heat sealing strip is fixedly arranged at the bottom of the upper heat sealing seat, the heat sealing strip is of a U-shaped strip structure, and a U-shaped opening of the heat sealing strip is arranged towards the drawing direction of the strip-shaped film; when the upper heat seal seat descends, the heat seal presses the strip-shaped film to the lower heat seal seat, heat generated by the heat seal strip is sealed on the strip-shaped film made of plastic, three-side heat sealing is carried out on the strip-shaped film, a single bag body with an opening facing the pull-out direction of the strip-shaped film is formed, and after the three-side heat sealing is finished, the bag body pulling-out mechanism pulls out the strip-shaped film outwards, so that the single bag body on the strip-shaped film passes through the bag cutting mechanism.

Preferably, the bag clamping mechanism is arranged on one side of the three-side heat sealing mechanism along the pulling direction of the strip-shaped film, and when the single bag body on the strip-shaped film passes through the bag cutting mechanism, the bag clamping mechanism clamps the strip-shaped film on the inner side of the single bag body; the bag clamping mechanism comprises a supporting seat, a bag clamping cylinder, an upper clamping strip, a lower clamping strip and a clamping block, wherein the supporting seat is arranged on the frame, and the side wall of the supporting seat is arranged towards the direction of the strip-shaped film; the bag clamping cylinder is vertically arranged on the side wall of the supporting seat; the upper holding strip and the lower holding strip are connected to the output end of the bag clamping cylinder at intervals up and down and extend to the upper side and the lower side of the strip-shaped film respectively; the clamping blocks comprise at least two clamping blocks, the clamping blocks are respectively arranged at the lower part and the upper part of the upper clamping strip and the lower clamping strip at intervals, and the upper clamping strip and the lower clamping strip are driven to move relatively through a bag clamping cylinder, so that the clamping blocks clamp the inner side of the bag body at the upper outer end of the strip-shaped film; after the packaging is completed, the bag body pulling mechanism returns to the bag clamping mechanism and clamps the strip-shaped film to be pulled out so as to carry out the next packaging.

Preferably, the bag cutting mechanism is arranged at one side of the bag clamping mechanism along the pulling-out direction of the strip-shaped film; the bag cutting mechanism comprises a bracket, an upper cylinder, a cutter holder, a pressing seat, a cutter, a lower cylinder and a cutting seat, wherein the bracket is arranged on the frame, and the upper part of the bracket is arranged above the strip-shaped film in a crossing way; the upper cylinder is arranged on the side wall of the bracket, and the output end of the upper cylinder is arranged downwards; the tool apron is connected to the output end of the upper cylinder and driven by the upper cylinder to move up and down; the pressing seat is connected to the lower part of the tool apron through a spring rod; the cutter is vertically connected to the lower part of the cutter holder, penetrates through the pressing seat and extends downwards, and freely slides in the pressing seat; the lower cylinders are arranged below the upper cylinders at intervals, and the output ends of the lower cylinders face upwards; the cutting seat is connected to the output end of the lower cylinder and is positioned at the lower side of the strip-shaped film; a concave groove is formed in the cutting seat along the transverse section direction of the strip-shaped film, a concave knife groove is formed in the concave groove, and the knife groove is arranged up and down correspondingly to the cutter; when the bag body pulling mechanism pulls out the bag body at the outer end of the strip-shaped film to the outer side of the bag cutting mechanism, the cutter seat drives the cutter and the pressing seat to descend, and the pressing seat presses the bag bodies at two sides of the cutter and is buffered by the spring rod; the cutter descends continuously and is inserted into the cutter groove, and the bag body is cut off from the strip-shaped film; the cut bag body is continuously pulled out through the bag body pulling mechanism.

Preferably, the side edge cutting mechanism is arranged at one side of the bag cutting mechanism along the pulling direction of the strip-shaped film, and the bag body cut by the bag cutting mechanism is pulled out to the side edge cutting mechanism through the bag body pulling mechanism so as to cut the side edges at two sides of the bag body in order; the side edge cutting mechanism comprises a fixing seat, an upper edge cutting cylinder, an edge cutting seat, an edge cutting pressing plate, an edge cutting knife, a lower edge cutting cylinder, an edge cutting support and a waste box; the fixed seat is arranged on the frame, and the upper part of the fixed seat is arranged above the bag body in a crossing way; the upper edge cutting cylinder is arranged on the side wall of the fixed seat, and the output end of the upper edge cutting cylinder is arranged downwards; the edge cutting seat is connected to the output end of the edge cutting cylinder, the bottom of the edge cutting seat is horizontally and alternately connected with edge cutting pressing plates through spring rods, and through grooves are respectively formed in the front side and the rear side of the edge cutting pressing plates; the two edge cutting knives are vertically connected to the front side and the rear side of the bottom of the edge cutting seat respectively, and extend downwards through two through grooves of the edge cutting pressing plate respectively; the lower trimming cylinder is correspondingly arranged at the lower part of the upper trimming cylinder, and the output end of the lower trimming cylinder faces upwards; the edge cutting support is horizontally connected to the output end of the lower edge cutting cylinder and is positioned at the lower side of the bag body; the front side and the rear side of the trimming support are respectively provided with trimming grooves which extend outwards and downwards in an inclined manner; the two waste boxes are respectively arranged close to the side edges of the two edge cutting grooves; the cut bag body is clamped and conveyed to the cutting edge support by the bag body pulling mechanism, and the front side and the rear side of the bag body extend to the outer sides of the two cutting edge grooves respectively; the upper edge cutting cylinder and the lower edge cutting cylinder respectively drive the edge cutting seat and the edge cutting support to move relatively, the edge cutting pressing plate tightly presses the bag body on the edge cutting support, the edge cutting seat drives the edge cutting knife to continuously descend, the edge cutting knife penetrates through the through groove on the edge cutting pressing plate to cut into the edge cutting groove downwards, so that the side edges of the front side and the rear side of the bag body are cut neatly, and the cut waste edges slide into the waste box through the edge cutting groove.

Preferably, the bag opening mechanism is arranged at one side of the side cutting mechanism at intervals along the pulling-out direction of the strip-shaped film, the bag body after the side cutting is clamped to the bag opening mechanism through the bag body pulling-out mechanism, and the bag body pulling-out mechanism releases the bag body and returns to the bag clamping mechanism along the pulling-out direction of the strip-shaped film; the bag opening mechanism comprises a frame body, a sliding rail, a bag opening cylinder, a pushing seat, a sliding block, a connecting seat, a bag opening cylinder and a suction block, wherein the frame body is arranged on a frame, and an upper support plate of the frame body is arranged above the bag body in a crossing manner; the sliding rail is arranged at the lower part of the upper support plate along the transverse direction of the strip-shaped film; the bag opening cylinder is arranged at the upper part of the upper support plate, and the output end of the bag opening cylinder is arranged along the direction of the upper support plate; the pushing seats comprise two pushing seats, and the two pushing seats are respectively connected to the output ends of the bag opening air cylinders and driven by the bag opening air cylinders; the connecting seats are of Z-shaped plate structures, the connecting seats comprise two connecting seats, the upper parts of the two connecting seats are connected to the side walls of the pushing seats, the lower parts of the connecting seats respectively extend downwards along Z-shaped paths, and the connecting seats are slidably connected to the sliding rails through sliding blocks; the two bag opening cylinders are respectively arranged at the lower parts of the two connecting seats, and the output ends of the two bag opening cylinders are oppositely arranged at the front side and the rear side of the bag body at intervals; the suction blocks comprise at least two suction blocks, the output end of the bag opening cylinder is connected with two suction blocks at intervals up and down, the two suction blocks are positioned at the upper side and the lower side of the bag body, and one side of the two suction blocks, which is close to the bag body, is provided with a vacuum suction port which is connected with a vacuum generating device so as to generate negative pressure to adsorb the surface of the bag body; when the bag body is clamped and transported between the two bag opening air cylinders, the bag opening air cylinders drive the two bag opening air cylinders to be close to the bag body, the bag opening air cylinders drive the upper suction block and the lower suction block to move in opposite directions to be close to the upper surface and the lower surface of the bag opening of the bag body, and after the vacuum suction openings of the upper suction block and the lower suction block adsorb the upper surface and the lower surface of the bag body, the bag opening air cylinders drive the two suction blocks to move in opposite directions to suck the upper surface and the lower surface of the bag opening of the bag body, so that the bag opening is opened, and a product to be packaged is pushed in.

Preferably, a sealing mechanism and a pushing mechanism are arranged on one side of the bag opening mechanism, the sealing mechanism comprises a sealing bracket, an upper sealing cylinder, an upper heat sealing block, a lower sealing cylinder and a lower heat sealing block, wherein the sealing bracket is arranged on a frame, and the upper part of the sealing bracket is arranged above the bag body in a crossing way; the upper sealing cylinder is vertically arranged on the side wall of the sealing bracket, and the output end of the upper sealing cylinder is downward; the upper heat sealing block is connected to the output end of the upper sealing cylinder; the lower sealing cylinder is vertically arranged at the lower part of the frame, and the output end of the lower sealing cylinder is upwards arranged; the lower heat sealing block is connected to the output end of the lower sealing cylinder; the pushing mechanism comprises a trough and a pushing block, a product to be packaged is placed in the trough, one side of the trough extends to the outer side of the frame, the other side of the trough extends to the outer side of a bag opening of the bag body, and after the bag opening of the bag body is opened by the bag opening mechanism, the product in the trough is pushed into the bag opening by driving the pushing block through an air cylinder; the upper sealing cylinder and the lower sealing cylinder respectively drive the upper heat sealing block and the lower heat sealing block to move in opposite directions, and clamp and heat seal the bag opening.

Preferably, the lower part of the frame is also provided with a guide box, the upper end of the guide box is arranged below the bag body, and the lower end of the guide box extends downwards to the front side of the frame in an inclined way; after the bag body is sealed, the bag body slides into the material guiding box and slides into the material storage box arranged on the front side of the frame along the material guiding box.

An automatic packaging process of a double-film bag-forming type automatic packaging machine comprises the following process steps:

s1, double-film pulling: the upper film and the lower film led out by the upper film rolling mechanism and the lower film rolling mechanism are overlapped up and down to form a strip film with a double-layer structure, and the outer end of the strip film is clamped by the bag body pulling mechanism and then pulled out;

s2, three-side heat sealing: the bag body pulling mechanism in the step S1 pulls the overlapped strip-shaped film to the three-side heat sealing mechanism, and three sides are heat-sealed and closed by the three-side heat sealing mechanism, so that continuous single bag bodies are formed on the strip-shaped film at intervals;

s3, cutting a single bag: the bag body pulling mechanism pulls out the bag body at the outer end of the strip-shaped film in the step S2 to the bag cutting mechanism, and the single bag body at the outer end is cut off from the strip-shaped film through the bag cutting mechanism;

s4, bag clamping: before the bag body at the outer end of the strip-shaped film is cut off in the step S3, the bag clamping mechanism clamps the strip-shaped film at the inner side of the bag body at the outer end;

s5, cutting the side edges: the bag body pulling mechanism continuously clamps the outer end bag body cut in the step S3, and transfers the outer end bag body to the side edge cutting mechanism, and the front side edge and the rear side edge of the bag body are cut in order through the side edge cutting mechanism;

s6, bagging the product: the bag body pulling mechanism conveys the bag body with the side edges cut in the step S5 to the bag opening mechanism, and after the bag opening mechanism opens the bag opening on the outer side, the product is pushed into the bag body from the bag opening by the pushing mechanism;

S7, sealing: after the product in the step S6 is filled into the bag body, the sealing mechanism seals the bag opening of the bag body in a heat sealing way;

s8, blanking: after the bag opening of the bag body in the step S7 is closed, the bag opening mechanism loosens the bag body, the bag body slides down onto the material guiding box, and is guided into the material storing box through the material guiding box; the bag body pulling mechanism moves back to the bag clamping mechanism and clamps the strip-shaped film at the bag clamping mechanism so as to carry out the next packaging action.

The invention has the beneficial effects that:

the invention designs a double-film bag-forming type automatic packaging machine and an automatic packaging process thereof, which integrate the automatic packaging procedures of film drawing lamination, film clamping, three-side heat sealing, bag cutting, side cutting, bag opening, product bagging, sealing and the like into a whole for the automatic packaging of the medical kit aiming at the defects and shortcomings of the existing packaging, and simultaneously realize the production of the packaging bag and the packaging of the kit. The invention is aimed at a double-layer structure of a packaging bag, an upper film rolling mechanism and a lower film rolling mechanism are correspondingly arranged on the upper side and the lower side of a frame, plastic films rolled on rolling wheels of the upper film rolling mechanism and the lower film rolling mechanism are tensioned by a tensioning wheel, are vertically overlapped into a strip film with a double-layer structure, are led out outwards, the outer end of the strip film is clamped by a bag body pulling mechanism extending along the side direction of the frame, the strip film is pulled out to a three-side heat sealing mechanism, the part of the strip film close to the outer end is sealed and closed by the three-side heat sealing mechanism, and a plurality of bag bodies with outside (left) openings are formed on the strip film at intervals continuously along with the intermittent continuous pulling of the strip film pulling mechanism; after three-side heat sealing is finished, the bag body pulling mechanism keeps clamping the strip-shaped film and continues to pull outwards, the strip-shaped film passes through the bag clamping mechanism to extend to the bag cutting mechanism, the pulling distance of the bag body pulling mechanism is controlled by the industrial personal computer, the bag body positioned at the outermost end of the strip-shaped film is stretched to the bag cutting mechanism, meanwhile, the rear side of the bag body positioned at the outermost end is positioned at the bag clamping mechanism, at the moment, the bag clamping mechanism clamps the rear side part of the bag body positioned at the outermost end on the strip-shaped film, the bag cutting mechanism cuts the bag body positioned at the outermost end from the strip-shaped film, the bag clamping mechanism clamps the strip-shaped film to keep the strip-shaped film in a pulled state, so that the bag body pulling mechanism clamps the strip-shaped film from the bag clamping mechanism and pulls outwards during the next packaging action, and the outer end bag body cut from the strip-shaped film continues to be clamped by the bag body pulling mechanism; the bag body pulling mechanism transfers the cut single bag body to the side edge cutting mechanism, and redundant parts of the front side edge and the rear side edge of the bag body are cut in order by the side edge cutting mechanism; after the cutting of the side edges is completed, the bag body is conveyed to the bag opening mechanism by the bag body pulling mechanism, so that the bag opening which is not sealed and closed at the left side (outer end) of the bag body is aligned with the sealing mechanism and the pushing mechanism which are arranged at the outer side of the bag opening mechanism, the bag clamping mechanism loosens the bag body, the bag opening mechanism adsorbs the upper side and the lower side of the bag opening through the suction block, then the bag opening moves reversely along the vertical direction, and the product (kit) on the pushing mechanism slides into the bag opening through the trough under the pushing of the air cylinder and the pushing block; after the product is packaged, the sealing mechanism clamps the bag opening of the bag body from the upper side and the lower side and seals the bag opening in a heat sealing way; after the bag opening is sealed and closed, the bag opening mechanism loosens the bag body, and the bag body slides into a storage box arranged on the front side of the frame through a guide box to finish primary packaging; meanwhile, the bag body pulling mechanism returns to the bag clamping mechanism, the strip-shaped film is clamped again from the bag clamping mechanism and pulled out to carry out the next packaging action, and the cycle is carried out to form the kit packaging process of the automatic operation of the assembly line. The invention adopts the horizontal structure design as a whole, the bag body and the product flow along the straight line direction, the flowing directions of the bag body and the product are opposite, the bag body is overlapped by the upper and lower double-layer films and then is subjected to three-side heat sealing, bag clamping and side cutting in sequence to form an independent bag body, after the bag opening is opened at the bag opening mechanism, the product is pushed into the bag body from the opposite direction of the bag body by the pushing mechanism and is sealed and closed by the sealing mechanism, the whole process action is integrated in a single assembly line, the movement of the bag body is completed by a set of bag body pulling mechanism, the structure and the process design can efficiently and stably complete the bag body production and the product packaging action, and the experimental packaging production capacity can reach 700-900 pcs/h.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic diagram of a second perspective structure of the present invention.

Fig. 3 is a schematic perspective view of the hidden bag body pulling mechanism according to the present invention.

Fig. 4 is an enlarged schematic view of the structure at I in fig. 3.

Fig. 5 is a schematic perspective view of a bag pulling mechanism according to the present invention.

Fig. 6 is a schematic perspective view of a three-sided heat seal mechanism of the present invention.

Fig. 7 is a schematic perspective view of a bag clamping mechanism according to the present invention.

Fig. 8 is a schematic perspective view of a bag cutting mechanism according to the present invention.

FIG. 9 is a second perspective view of the bag cutting mechanism of the present invention.

FIG. 10 is a schematic perspective view of a side cutting mechanism according to the present invention.

FIG. 11 is a schematic diagram showing a side cutting mechanism according to a second embodiment of the present invention.

Fig. 12 is a schematic perspective view of the bag opening mechanism of the present invention.

FIG. 13 is a schematic flow chart of the process steps of the present invention.

Description of the embodiments

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 to 13, the technical scheme adopted by the invention is as follows: the double-film bag-forming type automatic packaging machine comprises a lower film rolling mechanism 2, an upper film rolling mechanism 3, a bag body pulling mechanism 4, a three-side heat sealing mechanism 5, a bag clamping mechanism 6, a bag cutting mechanism 7, a side cutting mechanism 8, a bag opening mechanism 9, a sealing mechanism 10 and a pushing mechanism 11, wherein the lower film rolling mechanism 2 and the upper film rolling mechanism 3 are respectively arranged at the lower part and the upper part of a frame 1, and strip films led out by the lower film rolling mechanism 2 and the upper film rolling mechanism 3 are overlapped up and down; the bag body pulling mechanism 4 is arranged on the frame 1 along the strip film guiding direction, and the bag body pulling mechanism 4 clamps the end part of one side of the strip film which is overlapped up and down and pulls the end part to the outside; the three-side heat sealing mechanism 5 is arranged at one side of the output end of the strip-shaped film, and three sides of the strip-shaped film are continuously heat-sealed and closed by the three-side heat sealing mechanism 5 after the overlapped strip-shaped film is pulled out to the three-side heat sealing mechanism 5, so that a plurality of bags A which are continuously arranged are formed on the strip-shaped film; the bag clamping mechanism 6 and the bag cutting mechanism 7 are sequentially arranged at one side of the three-side heat sealing mechanism 5 at intervals, and after the bag body A at the outer end of the strip-shaped film is pulled to the bag cutting mechanism 7, the bag clamping mechanism 6 clamps the inner side part of the bag body A at the outer end, and the bag cutting mechanism 7 cuts the bag body A at the outer end from the strip-shaped film; the side edge cutting mechanism 8 is arranged at one side of the bag cutting mechanism 7, after the bag body A is cut off from the strip-shaped film, the bag body A is clamped by the bag body pulling mechanism 4 and is continuously moved to the side edge cutting mechanism 8, and the side edge of the bag body A is cut neatly through the side edge cutting mechanism 8; the bag opening mechanism 9, the sealing mechanism 10 and the pushing mechanism 11 are respectively arranged at one side of the side cutting mechanism 8, after the bag body pulling mechanism 8 transfers the bag body A to the bag opening mechanism 9, the bag body A is loosened, the bag opening mechanism 9 clamps the bag body A, the bag opening of the bag body A is opened, and a product on the pushing mechanism 11 is pushed into the bag body A through the bag opening; the sealing mechanism 10 seals the bag opening of the bag body A after the product B is filled; after the bag opening is closed, the bag body pulling mechanism 4 returns to the bag clamping mechanism 6, and the strip-shaped film at the bag clamping mechanism 6 is clamped and pulled out to be packaged next time.

The bag body pulling mechanism 4 comprises a linear module 41, a pulling motor 42, a pulling screw 43, a clamping cylinder 44, an upper clamping plate 45 and a lower clamping plate 46, wherein the linear module 41 is of a strip-shaped structure, and the linear module 41 is arranged on the frame 1 in a linear manner along the guiding-out direction of the strip-shaped film; the pull-out screw 43 is rotatably disposed in the linear module 41; the pull-out motor 42 is disposed at one end of the linear module 41, and an output end of the pull-out motor 42 is connected with the pull-out screw 43 and drives the pull-out screw 43 to rotate; the clamping cylinder 44 is arranged at one side of the linear module 41, the side wall of the clamping cylinder 44 is connected with a pull-out screw seat sleeved on the pull-out screw 43, and when the pull-out screw 43 rotates, the pull-out screw seat drives the clamping cylinder 44 to linearly slide along the direction of the pull-out screw 43; the upper clamping plate 45 and the lower clamping plate 46 are respectively connected to the output ends of the clamping cylinder 44, and the clamping cylinder 44 drives the upper clamping plate 45 and the lower clamping plate 46 to move relatively along the vertical direction so as to clamp one end of the strip-shaped film, and the strip-shaped film is driven by the pull-out motor 42 to move linearly along the direction of the linear module 41.

The three-side heat sealing mechanism 5 comprises a support 51, a heat sealing cylinder 52, a heat sealing push rod 53, a support plate 54, a lower heat sealing seat 55, an upper heat sealing seat 56 and a heat sealing strip 57, wherein the support 51 is arranged on the frame 1 and is positioned at one side of the outwards extending strip-shaped film, and the side wall of the support 51 is arranged towards the strip-shaped film; the heat-sealing cylinder 52 is arranged on the side wall of the support 51, and the output end of the heat-sealing cylinder 52 is upward; the heat sealing push rod 53 is vertically connected to the output end of the heat sealing cylinder 52 and driven by the heat sealing cylinder 52 to move up and down; the support plate 54 is horizontally connected to the heat seal push rod 53 and extends to the upper part of the strip film; the lower heat-sealing seat 55 is arranged at the lower part of the heat-sealing cylinder 52 and extends to the lower part of the strip-shaped film; the upper heat seal seat 56 is fixed on the lower part of the support plate 54, the upper heat seal seat 56 and the lower heat seal seat 55 are vertically spaced on the upper side and the lower side of the strip-shaped film, and the upper heat seal seat 56 moves up and down along with the support plate 54; the heat sealing strip 57 is fixedly arranged at the bottom of the upper heat sealing seat 56, the heat sealing strip 57 is of a U-shaped strip structure, and a U-shaped opening of the heat sealing strip 57 is arranged towards the drawing direction of the strip-shaped film; when the upper heat seal seat 56 descends, the heat seal 57 presses the strip-shaped film down to the lower heat seal seat 55, heat generated by the heat seal 57 is sealed on the strip-shaped film made of plastic, three-side heat sealing is carried out on the strip-shaped film, a single bag body A with an opening facing the pulling direction of the strip-shaped film is formed, and after the three-side heat sealing is finished, the strip-shaped film is pulled out by the bag body pulling mechanism 4, so that the single bag body A on the strip-shaped film passes through the bag cutting mechanism 7.

The bag clamping mechanism 6 is arranged at one side of the three-side heat sealing mechanism 5 along the drawing direction of the strip-shaped film, and when the single bag body A on the strip-shaped film passes through the bag cutting mechanism 7, the bag clamping mechanism 6 clamps the strip-shaped film at the inner side of the single bag body A; the bag clamping mechanism 6 comprises a supporting seat 61, a bag clamping cylinder 62, an upper clamping strip 63, a lower clamping strip 64 and a clamping block 65, wherein the supporting seat 61 is arranged on the frame 1, and the side wall of the supporting seat 61 is arranged towards the direction of the strip-shaped film; the bag clamping cylinder 62 is vertically arranged on the side wall of the supporting seat 61; the upper and lower holding strips 63 and 64 are connected to the output end of the bag clamping cylinder 62 at an upper and lower interval and extend to the upper and lower sides of the strip film, respectively; the clamping blocks 65 comprise at least two clamping blocks 65, the clamping blocks 65 are respectively arranged at the lower part and the upper part of the upper clamping strip 63 and the lower clamping strip 64 at intervals, and the upper clamping strip 63 and the lower clamping strip 64 are driven to relatively move through the bag clamping cylinder 62, so that the clamping blocks 65 clamp the inner side of the bag body A at the upper outer end of the strip-shaped film; after the packaging is completed, the bag body pulling mechanism 4 returns to the bag clamping mechanism 6, and clamps the strip-shaped film to pull out for the next packaging.

The bag cutting mechanism 7 is arranged at one side of the bag clamping mechanism 6 along the drawing direction of the strip-shaped film; the bag cutting mechanism 7 comprises a bracket 71, an upper cylinder 72, a cutter holder, a pressing seat 73, a cutter 74, a lower cylinder 75 and a cutting seat 76, wherein the bracket 71 is arranged on the frame 1, and the upper part of the bracket 71 is arranged above the strip-shaped film in a straddling way; the upper cylinder 72 is disposed on a side wall of the bracket 71, and an output end of the upper cylinder 72 is disposed downward; the tool apron is connected to the output end of the upper cylinder 72 and driven by the upper cylinder 72 to move up and down; the pressing seat 73 is connected to the lower part of the tool apron through a spring rod; the cutter 74 is vertically connected to the lower part of the cutter holder, and extends downward through the pressing seat 73, and the cutter 74 freely slides in the pressing seat 73; the lower cylinders 75 are arranged below the upper cylinders 72 at intervals, and the output ends of the lower cylinders are arranged upwards; the cutting seat 76 is connected to the output end of the lower cylinder 75 and is positioned at the lower side of the strip-shaped film; a concave groove is formed in the cutting seat 76 along the transverse section direction of the strip-shaped film, a concave knife groove 77 is formed in the concave groove, and the knife groove 77 and the cutter 74 are arranged up and down correspondingly; when the bag body pulling mechanism 4 pulls out the bag body A at the outer end of the strip-shaped film to the outer side of the bag cutting mechanism 7, the cutter seat drives the cutter 74 and the pressing seat 73 to descend, and the pressing seat 73 presses the bag body A positioned at two sides of the cutter 74 and is buffered by the spring rod; the cutter 74 is further lowered and inserted into the cutter groove 77 to cut the bag A from the strip film; the cut bag body a is continuously pulled out through the bag body pulling mechanism 4.

The side cutting mechanism 8 is arranged on one side of the bag cutting mechanism 7 along the drawing direction of the strip-shaped film, and the bag body A cut by the bag cutting mechanism 7 is drawn out to the side cutting mechanism 8 through the bag body drawing mechanism 4 so as to cut the side edges on two sides of the bag body A in order; the side edge cutting mechanism 8 comprises a fixed seat 81, an upper edge cutting cylinder 82, an edge cutting seat 83, an edge cutting pressing plate 85, an edge cutting knife 86, a lower edge cutting cylinder 87, an edge cutting support 88 and a waste box 810; wherein, the fixed seat 81 is arranged on the frame 1, and the upper part of the fixed seat 81 is arranged above the bag A in a crossing way; the upper trimming cylinder 82 is disposed on a side wall of the fixing seat 81, and an output end thereof is disposed downward; the edge cutting seat 83 is connected to the output end of the edge cutting cylinder 82, the bottom of the edge cutting seat 83 is horizontally and alternately connected with edge cutting pressing plates 85 through spring rods 84, and through grooves are respectively formed in the front side and the rear side of the edge cutting pressing plates 85; the two edge cutters 86 are respectively and vertically connected to the front side and the rear side of the bottom of the edge cutting seat 83, and the two edge cutters 86 respectively pass through two through grooves of the edge cutting pressing plate 85 to extend downwards; the lower trimming cylinder 87 is correspondingly arranged at the lower part of the upper trimming cylinder 82, and the output end is upwards arranged; the trimming support 88 is horizontally connected to the output end of the lower trimming cylinder 82 and is located at the lower side of the bag body a; the front side and the rear side of the trimming support 88 are respectively provided with trimming grooves 89 which extend outwards and downwards in an inclined manner; the two waste cartridges 810 are respectively arranged near the side edges of the two edge cutting grooves 89; the cut bag A is clamped and conveyed to the cutting edge support 88 by the bag pulling mechanism 4, and the front side and the rear side edges of the bag A extend to the outer sides of the two cutting edge grooves 89 respectively; the upper edge cutting cylinder 82 and the lower edge cutting cylinder 87 respectively drive the edge cutting seat 83 and the edge cutting support 88 to move relatively, the edge cutting pressing plate 85 presses the bag body A on the edge cutting support 88, the edge cutting seat 83 drives the edge cutting knife 86 to continuously descend, the edge cutting knife 86 passes through the through groove on the edge cutting pressing plate 85 and cuts into the edge cutting groove 89 downwards, so that the side edges of the front side and the rear side of the bag body A are cut neatly, and the cut waste edges slide into the waste box 810 through the edge cutting groove 89.

The bag opening mechanism 9 is arranged at one side of the side edge cutting mechanism 8 at intervals along the strip-shaped film pulling direction, the bag body A after the side edge cutting is clamped to the bag opening mechanism 9 through the bag body pulling mechanism 4, and the bag body pulling mechanism 4 releases the bag body A and returns to the bag clamping mechanism 6 along the strip-shaped film pulling direction; the bag opening mechanism 9 comprises a frame 91, a slide rail 92, a bag opening cylinder 93, a push seat 94, a slide block 95, a connecting seat 96, a bag opening cylinder 97 and a suction block 98, wherein the frame 91 is arranged on the frame 1, and an upper support plate of the frame 91 is arranged above the bag A in a crossing manner; the slide rail 92 is arranged at the lower part of the upper support plate along the transverse direction of the strip-shaped film; the bag opening air cylinder 93 is arranged at the upper part of the upper support plate, and the output end of the bag opening air cylinder 93 is arranged along the direction of the upper support plate; the pushing seats 94 comprise two pushing seats 94, and the two pushing seats 94 are respectively connected to the output ends of the bag opening air cylinders 93 and driven by the bag opening air cylinders 93; the connecting seats 96 are of a Z-shaped plate structure, the connecting seats 96 comprise two connecting seats 96, the upper parts of the two connecting seats 96 are connected to the side wall of the pushing seat 94, the lower parts of the connecting seats 96 respectively extend downwards along a Z-shaped path, and the connecting seats 96 are slidably connected to the sliding rails 92 through sliding blocks 95; the two bag opening cylinders 97 are respectively arranged at the lower parts of the two connecting seats 96, and the output ends of the two bag opening cylinders 97 are oppositely arranged at the front side and the rear side of the bag body A at intervals; the suction blocks 98 comprise at least two suction blocks 98, wherein the output end of the bag opening cylinder 97 is connected with two suction blocks 98 at intervals up and down, the two suction blocks 98 are positioned at the upper side and the lower side of the bag body A, and a vacuum suction port is arranged at one side of the two suction blocks 98, which is close to the bag body A, and is connected with a vacuum generating device so as to generate negative pressure to adsorb the surface of the bag body A; when the bag body A is clamped and transported between the two bag opening air cylinders 97, the bag opening air cylinders 93 drive the two bag opening air cylinders 97 to be close to the bag body A, the bag opening air cylinders 97 drive the upper suction block 98 and the lower suction block 98 to move towards each other to be close to the upper surface and the lower surface of the bag opening of the bag body A, and after the vacuum suction openings of the upper suction block 98 and the lower suction block 98 adsorb the upper surface and the lower surface of the bag body A, the bag opening air cylinders 97 drive the two suction blocks 98 to move relatively to suck the upper surface and the lower surface of the bag opening of the bag body A, so that the bag opening is opened, and a product to be packaged is pushed in.

A sealing mechanism 10 and a pushing mechanism 11 are arranged on one side of the bag opening mechanism 9, the sealing mechanism 10 comprises a sealing bracket 101, an upper sealing cylinder 102, an upper heat sealing block 103, a lower sealing cylinder 104 and a lower heat sealing block 105, wherein the sealing bracket 101 is arranged on the frame 1, and the upper part of the sealing bracket 101 is arranged above the bag body 1 in a crossing way; the upper sealing cylinder 102 is vertically arranged on the side wall of the sealing bracket 101, and the output end is downward arranged; the upper heat sealing block 103 is connected to the output end of the upper sealing cylinder 102; the lower sealing cylinder 104 is vertically arranged at the lower part of the frame 1, and the output end of the lower sealing cylinder is upwards arranged; the lower heat sealing block 105 is connected to the output end of the lower sealing cylinder 104; the pushing mechanism 11 comprises a trough and a pushing block, a product to be packaged is placed in the trough, one side of the trough extends to the outer side of the frame 1, the other side of the trough extends to the outer side of a bag opening of the bag body A, and after the bag opening of the bag body A is opened by the bag opening mechanism 9, the product in the trough is pushed into the bag opening by driving the pushing block through an air cylinder; the upper sealing cylinder 102 and the lower sealing cylinder 104 respectively drive the upper heat sealing block 103 and the lower heat sealing block 105 to move in opposite directions, and clamp and heat seal the bag opening.

The lower part of the frame 1 is also provided with a guide box 12, the upper end of the guide box 12 is arranged below the bag body A, and the lower end of the guide box 12 extends downwards to the front side of the frame 1 in an inclined way; after the sealing of the bag body A is finished, the bag body A slides into the material guiding box 12 and slides into the material storing box 13 arranged on the front side of the frame 1 along the material guiding box 12.

Furthermore, the invention designs a double-film bag-forming type automatic packaging machine and an automatic packaging process thereof, which integrate the automatic packaging procedures of film drawing lamination, film clamping, three-side heat sealing, bag cutting, side cutting, bag opening, product bagging, sealing and the like into a whole, realize the production of packaging bags and the packaging of the medical kit, and have compact packaging procedures and can improve the productivity to 800 pcs/h. The invention is aimed at a double-layer structure of a packaging bag, an upper film rolling mechanism and a lower film rolling mechanism are correspondingly arranged on the upper side and the lower side of a frame, plastic films rolled on rolling wheels of the upper film rolling mechanism and the lower film rolling mechanism are tensioned by a tensioning wheel, are vertically overlapped into a strip film with a double-layer structure, are led out outwards, the outer end of the strip film is clamped by a bag body pulling mechanism extending along the side direction of the frame, the strip film is pulled out to a three-side heat sealing mechanism, the part of the strip film close to the outer end is sealed and closed by the three-side heat sealing mechanism, and a plurality of bag bodies with outside (left) openings are formed on the strip film at intervals continuously along with the intermittent continuous pulling of the strip film pulling mechanism; after three-side heat sealing is finished, the bag body pulling mechanism keeps clamping the strip-shaped film and continues to pull outwards, the strip-shaped film passes through the bag clamping mechanism to extend to the bag cutting mechanism, the pulling distance of the bag body pulling mechanism is controlled by the industrial personal computer, the bag body positioned at the outermost end of the strip-shaped film is stretched to the bag cutting mechanism, meanwhile, the rear side of the bag body positioned at the outermost end is positioned at the bag clamping mechanism, at the moment, the bag clamping mechanism clamps the rear side part of the bag body positioned at the outermost end on the strip-shaped film, the bag cutting mechanism cuts the bag body positioned at the outermost end from the strip-shaped film, the bag clamping mechanism clamps the strip-shaped film to keep the strip-shaped film in a pulled state, so that the bag body pulling mechanism clamps the strip-shaped film from the bag clamping mechanism and pulls outwards during the next packaging action, and the outer end bag body cut from the strip-shaped film continues to be clamped by the bag body pulling mechanism; the bag body pulling mechanism transfers the cut single bag body to the side edge cutting mechanism, and redundant parts of the front side edge and the rear side edge of the bag body are cut in order by the side edge cutting mechanism; after the cutting of the side edges is completed, the bag body is conveyed to the bag opening mechanism by the bag body pulling mechanism, so that the bag opening which is not sealed and closed at the left side (outer end) of the bag body is aligned with the sealing mechanism and the pushing mechanism which are arranged at the outer side of the bag opening mechanism, the bag clamping mechanism loosens the bag body, the bag opening mechanism adsorbs the upper side and the lower side of the bag opening through the suction block, then the bag opening moves reversely along the vertical direction, and the product (kit) on the pushing mechanism slides into the bag opening through the trough under the pushing of the air cylinder and the pushing block; after the product is packaged, the sealing mechanism clamps the bag opening of the bag body from the upper side and the lower side and seals the bag opening in a heat sealing way; after the bag opening is sealed and closed, the bag opening mechanism loosens the bag body, and the bag body slides into a storage box arranged on the front side of the frame through a guide box to finish primary packaging; meanwhile, the bag body pulling mechanism returns to the bag clamping mechanism, the strip-shaped film is clamped again from the bag clamping mechanism and pulled out to carry out the next packaging action, and the cycle is carried out to form the kit packaging process of the automatic operation of the assembly line. The invention adopts the horizontal structure design as a whole, the bag body and the product flow along the straight line direction, the flowing directions of the bag body and the product are opposite, the bag body is overlapped by the upper and lower double-layer films and then is subjected to three-side heat sealing, bag clamping and side cutting in sequence to form an independent bag body, after the bag opening is opened at the bag opening mechanism, the product is pushed into the bag body from the opposite direction of the bag body by the pushing mechanism and is sealed and closed by the sealing mechanism, the whole process action is integrated in a single assembly line, the movement of the bag body is completed by a set of bag body pulling mechanism, the structure and the process design can efficiently and stably complete the bag body production and the product packaging action, and the experimental packaging production capacity can reach 700-900 pcs/h.

The examples of the present invention are presented only to describe specific embodiments thereof and are not intended to limit the scope of the invention. Certain modifications may be made by those skilled in the art in light of the teachings of this embodiment, and all equivalent changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A double-film bag-forming type automatic packaging machine is characterized in that: the automatic packaging machine comprises a lower film rolling mechanism (2), an upper film rolling mechanism (3), a bag body pulling mechanism (4), a three-side heat sealing mechanism (5), a bag clamping mechanism (6), a bag cutting mechanism (7), a side cutting mechanism (8), a bag opening mechanism (9), a sealing mechanism (10) and a pushing mechanism (11), wherein the lower film rolling mechanism (2) and the upper film rolling mechanism (3) are respectively arranged at the lower part and the upper part of a frame (1), and strip films led out by the lower film rolling mechanism (2) and the upper film rolling mechanism (3) are overlapped up and down; the bag body pulling mechanism (4) is arranged on the frame (1) along the strip film guiding direction, and the bag body pulling mechanism (4) clamps one end part of the strip film which is overlapped up and down and pulls the end part to the outside; the three-side heat sealing mechanism (5) is arranged at one side of the output end of the strip-shaped film, and after the overlapped strip-shaped film is pulled out to the three-side heat sealing mechanism (5), three sides are continuously heat-sealed and closed by the three-side heat sealing mechanism (5), so that a plurality of continuously arranged bag bodies (A) are formed on the strip-shaped film; the bag clamping mechanism (6) and the bag cutting mechanism (7) are sequentially arranged at one side of the three-side heat sealing mechanism (5) at intervals, after the bag body (A) at the outer end of the strip-shaped film is pulled to the bag cutting mechanism (7), the bag clamping mechanism (6) clamps the inner side part of the bag body (A) at the outer end, and the bag cutting mechanism (7) cuts the bag body (A) at the outer end from the strip-shaped film; the side edge cutting mechanism (8) is arranged on one side of the bag cutting mechanism (7), after the bag body (A) is cut off from the strip-shaped film, the bag body pulling mechanism (4) clamps the bag body (A) and continuously moves the bag body (A) to the side edge cutting mechanism (8), and the side edge of the bag body (A) is cut neatly through the side edge cutting mechanism (8); the bag opening mechanism (9), the sealing mechanism (10) and the pushing mechanism (11) are respectively arranged at one side of the side cutting mechanism (8), the bag body pulling mechanism (8) transfers the bag body (A) to the bag opening mechanism (9), then the bag body (A) is loosened, the bag opening mechanism (9) clamps the bag body (A) and opens the bag mouth of the bag body (A), and a product on the pushing mechanism (11) is pushed into the bag body (A) through the bag mouth; the sealing mechanism (10) is used for sealing the bag mouth of the bag body (A) filled with the product (B) in a heat sealing way; after the bag opening is closed, the bag body pulling mechanism (4) returns to the bag clamping mechanism (6), and the strip film at the bag clamping mechanism (6) is clamped and pulled out to carry out the next package;

The bag opening mechanism (9) is arranged at one side of the side cutting mechanism (8) at intervals along the pulling-out direction of the strip-shaped film, the bag body (A) after the side cutting is completed is clamped to the bag opening mechanism (9) through the bag body pulling-out mechanism (4), and the bag body pulling-out mechanism (4) releases the bag body (A) and returns to the bag clamping mechanism (6) along the pulling-out direction of the strip-shaped film; the bag opening mechanism (9) comprises a frame body (91), a sliding rail (92), a bag opening cylinder (93), a pushing seat (94), a sliding block (95), a connecting seat (96), a bag opening cylinder (97) and a suction block (98), wherein the frame body (91) is arranged on the frame (1), and an upper support plate of the frame body (91) is arranged above the bag body (A) in a crossing manner; the slide rail (92) is arranged at the lower part of the upper support plate along the transverse direction of the strip-shaped film; the bag opening air cylinder (93) is arranged at the upper part of the upper support plate, and the output end of the bag opening air cylinder (93) is arranged along the direction of the upper support plate; the pushing seats (94) comprise two pushing seats (94) which are respectively connected to the output ends of the bag opening air cylinders (93) and driven by the bag opening air cylinders (93); the connecting seats (96) are of Z-shaped plate structures, the connecting seats (96) comprise two, the upper parts of the two connecting seats (96) are connected to the side wall of the pushing seat (94), the lower parts of the connecting seats (96) respectively extend downwards along Z-shaped paths, and the connecting seats (96) are slidably connected to the sliding rail (92) through sliding blocks (95); the bag opening cylinders (97) comprise two, the two bag opening cylinders (97) are respectively arranged at the lower parts of the two connecting seats (96), and the output ends of the two bag opening cylinders are oppositely arranged at the front side and the rear side of the bag body (A) at intervals; the suction blocks (98) comprise at least two suction blocks (98), the output end of the bag opening air cylinder (97) is connected with two suction blocks (98) at intervals up and down, the two suction blocks (98) are positioned on the upper side and the lower side of the bag body (A), a vacuum suction port is arranged on one side, close to the bag body (A), of each suction block (98), and the vacuum suction port is connected with a vacuum generating device so as to generate negative pressure to adsorb the surface of the bag body (A); when the bag body (A) is clamped and transported between two bag opening air cylinders (97), the bag opening air cylinders (93) drive the two bag opening air cylinders (97) to be close to the bag body (A), the bag opening air cylinders (97) drive the upper suction block and the lower suction block (98) to move in opposite directions to press close to the upper surface and the lower surface of the bag opening of the bag body (A), and after the upper suction block and the lower suction block (98) adsorb the upper surface and the lower surface of the bag body (A), the bag opening air cylinders (97) drive the two suction blocks (98) to move relatively to suck the upper surface and the lower surface of the bag opening of the bag body (A) away, so that the bag opening is opened so as to push a product to be packaged.

2. The double-film bag-forming automatic packaging machine according to claim 1, wherein: the bag body pulling mechanism (4) comprises a linear module (41), a pulling motor (42), a pulling screw rod (43), a clamping cylinder (44), an upper clamping plate (45) and a lower clamping plate (46), wherein the linear module (41) is of a strip-shaped structure, and the linear module (41) is arranged on the frame (1) in a linear mode along the guiding-out direction of the strip-shaped film; the pull-out screw rod (43) is rotatably arranged in the linear module (41); the pull-out motor (42) is arranged at one end of the linear module (41), and the output end of the pull-out motor (42) is connected with the pull-out screw rod (43) and drives the pull-out screw rod (43) to rotate; the clamping cylinder (44) is arranged on one side of the linear module (41), the side wall of the clamping cylinder (44) is connected with a pull-out screw rod seat sleeved on the pull-out screw rod (43), and when the pull-out screw rod (43) rotates, the pull-out screw rod seat drives the clamping cylinder (44) to linearly slide along the direction of the pull-out screw rod (43); the upper clamping plate (45) and the lower clamping plate (46) are respectively connected to the output end of the clamping cylinder (44), and the clamping cylinder (44) drives the upper clamping plate (45) and the lower clamping plate (46) to move relatively along the vertical direction so as to clamp one end part of the strip-shaped film, and the strip-shaped film is driven by the pull-out motor (42) to move linearly along the direction of the linear module (41).

3. The double-film bag-forming automatic packaging machine according to claim 2, wherein: the three-side heat sealing mechanism (5) comprises a support (51), a heat sealing cylinder (52), a heat sealing push rod (53), a support plate (54), a lower heat sealing seat (55), an upper heat sealing seat (56) and a heat sealing strip (57), wherein the support (51) is arranged on the frame (1) and is positioned at one side of the outwards extending strip-shaped film, and the side wall of the support (51) is arranged towards the direction of the strip-shaped film; the heat-sealing air cylinder (52) is arranged on the side wall of the support (51), and the output end of the heat-sealing air cylinder (52) is upwards arranged; the heat sealing push rod (53) is vertically connected to the output end of the heat sealing air cylinder (52) and driven by the heat sealing air cylinder (52) to move up and down; the support plate (54) is horizontally connected to the heat sealing push rod (53) and extends to the upper part of the strip-shaped film; the lower heat sealing seat (55) is arranged at the lower part of the heat sealing cylinder (52) and extends to the lower part of the strip-shaped film; the upper heat seal seat (56) is fixed at the lower part of the support plate (54), the upper heat seal seat (56) and the lower heat seal seat (55) are vertically spaced at the upper side and the lower side of the strip-shaped film, and the upper heat seal seat (56) moves up and down along with the support plate (54); the heat sealing strip (57) is fixedly arranged at the bottom of the upper heat sealing seat (56), the heat sealing strip (57) is of a U-shaped strip structure, and a U-shaped opening of the heat sealing strip is arranged towards the pulling-out direction of the strip-shaped film; when the upper heat seal seat (56) descends, the heat seal strip (57) presses the strip-shaped film down to the lower heat seal seat (55), heat generated by the heat seal strip (57) is used for heat sealing on the strip-shaped film made of plastic materials, three-side heat sealing is carried out on the strip-shaped film, a single bag body (A) with an opening facing the pulling direction of the strip-shaped film is formed, and after the three-side heat sealing is completed, the bag body pulling mechanism (4) pulls the strip-shaped film outwards, so that the single bag body (A) on the strip-shaped film passes through the bag cutting mechanism (7).

4. A twin film bag automatic packaging machine according to claim 3, wherein: the bag clamping mechanism (6) is arranged on one side of the three-side heat sealing mechanism (5) along the pulling-out direction of the strip-shaped film, and when a single bag body (A) on the strip-shaped film passes through the bag cutting mechanism (7), the bag clamping mechanism (6) clamps the strip-shaped film on the inner side of the single bag body (A); the bag clamping mechanism (6) comprises a supporting seat (61), a bag clamping cylinder (62), an upper clamping strip (63), a lower clamping strip (64) and a clamping block (65), wherein the supporting seat (61) is arranged on the frame (1), and the side wall of the supporting seat (61) is arranged towards the direction of the strip-shaped film; the bag clamping cylinder (62) is vertically arranged on the side wall of the supporting seat (61); the upper clamping strip (63) and the lower clamping strip (64) are connected to the output end of the bag clamping cylinder (62) at intervals up and down and extend to the upper side and the lower side of the strip-shaped film respectively; the clamping blocks (65) comprise at least two clamping blocks, the clamping blocks (65) are respectively arranged at the lower part and the upper part of the upper clamping strip (63) and the lower clamping strip (64) at intervals, and the upper clamping strip (63) and the lower clamping strip (64) are driven to move relatively through the bag clamping cylinder (62) so that the clamping blocks (65) clamp the inner side of the bag body (A) at the upper outer end of the strip-shaped film; after the packaging is completed, the bag body pulling mechanism (4) returns to the bag clamping mechanism (6) and clamps the strip-shaped film to be pulled out for the next packaging.

5. The double-film bag-forming automatic packaging machine according to claim 4, wherein: the bag cutting mechanism (7) is arranged at one side of the bag clamping mechanism (6) along the pulling-out direction of the strip-shaped film; the bag cutting mechanism (7) comprises a bracket (71), an upper cylinder (72), a cutter holder, a pressing seat (73), a cutter (74), a lower cylinder (75) and a cutting seat (76), wherein the bracket (71) is arranged on the frame (1), and the upper part of the bracket (71) is arranged above the strip-shaped membrane in a crossing manner; the upper cylinder (72) is arranged on the side wall of the bracket (71), and the output end of the upper cylinder (72) is arranged downwards; the tool apron is connected to the output end of the upper cylinder (72) and driven by the upper cylinder (72) to move up and down; the pressing seat (73) is connected to the lower part of the tool apron through a spring rod; the cutter (74) is vertically connected to the lower part of the cutter holder, penetrates through the pressing seat (73) and extends downwards, and the cutter (74) freely slides in the pressing seat (73); the lower air cylinders (75) are arranged below the upper air cylinders (72) at intervals, and the output ends of the lower air cylinders are upwards arranged; the cutting seat (76) is connected to the output end of the lower cylinder (75) and is positioned at the lower side of the strip-shaped film; a concave groove is formed in the cutting seat (76) along the transverse section direction of the strip-shaped film, a concave knife groove (77) is formed in the concave groove, and the knife groove (77) and the cutter (74) are arranged up and down correspondingly; when the bag body pulling mechanism (4) pulls out the bag body (A) at the outer end of the strip-shaped film to the outer side of the bag cutting mechanism (7), the cutter seat drives the cutter (74) and the pressing seat (73) to descend, and the pressing seat (73) presses the bag body (A) positioned at two sides of the cutter (74) and is buffered by the spring rod; the cutter (74) is continuously lowered and inserted into the cutter groove (77) to cut the bag body (A) from the strip-shaped film; the cut bag body (A) is continuously pulled out through the bag body pulling mechanism (4).

6. The double-film bag-forming automatic packaging machine according to claim 5, wherein: the side edge cutting mechanism (8) is arranged on one side of the bag cutting mechanism (7) along the pulling-out direction of the strip-shaped film, and the bag body (A) cut by the bag cutting mechanism (7) is pulled out to the side edge cutting mechanism (8) through the bag body pulling-out mechanism (4) so as to cut the side edges on two sides of the bag body (A) in order; the side edge cutting mechanism (8) comprises a fixed seat (81), an upper edge cutting cylinder (82), an edge cutting seat (83), an edge cutting pressing plate (85), an edge cutting knife (86), a lower edge cutting cylinder (87), an edge cutting support (88) and a waste box (810); the fixing seat (81) is arranged on the frame (1), and the upper part of the fixing seat (81) is arranged above the bag body (A) in a crossing way; the upper edge cutting cylinder (82) is arranged on the side wall of the fixed seat (81), and the output end of the upper edge cutting cylinder is downward; the edge cutting seat (83) is connected to the output end of the edge cutting cylinder (82), the bottom of the edge cutting seat (83) is horizontally connected with edge cutting pressing plates (85) at intervals through spring rods (84), and through grooves are respectively formed in the front side and the rear side of the edge cutting pressing plates (85); the two edge cutting knives (86) are respectively and vertically connected to the front side and the rear side of the bottom of the edge cutting seat (83), and the two edge cutting knives (86) respectively penetrate through two through grooves of the edge cutting pressing plate (85) to extend downwards; the lower trimming cylinder (87) is correspondingly arranged at the lower part of the upper trimming cylinder (82), and the output end of the lower trimming cylinder is upwards arranged; the edge cutting support (88) is horizontally connected to the output end of the lower edge cutting cylinder (82) and is positioned at the lower side of the bag body (A); the front side and the rear side of the trimming support (88) are respectively provided with trimming grooves (89) which extend downwards and outwards in an inclined way; the two waste boxes (810) are arranged close to the side edges of the two edge cutting grooves (89) respectively; the cut bag body (A) is clamped and conveyed to the cutting edge support (88) by the bag body pulling mechanism (4), and the front side and the rear side of the bag body (A) extend to the outer sides of the two cutting edge grooves (89) respectively; the upper trimming cylinder (82) and the lower trimming cylinder (87) respectively drive the trimming seat (83) and the trimming support (88) to move relatively, the trimming pressing plate (85) tightly presses the bag body (A) on the trimming support (88), the trimming seat (83) drives the trimming knife (86) to continuously descend, the trimming knife (86) passes through the through groove on the trimming pressing plate (85) and cuts into the trimming groove (89) downwards, so that the side edges on the front side and the rear side of the bag body (A) are trimmed, and the trimmed waste edges slide into the waste box (810) through the trimming groove (89).

7. The double-film bag-forming automatic packaging machine according to claim 6, wherein: one side of the bag opening mechanism (9) is provided with a sealing mechanism (10) and a pushing mechanism (11), the sealing mechanism (10) comprises a sealing bracket (101), an upper sealing cylinder (102), an upper heat sealing block (103), a lower sealing cylinder (104) and a lower heat sealing block (105), wherein the sealing bracket (101) is arranged on the frame (1), and the upper part of the sealing bracket (101) is arranged above the bag body (1) in a crossing manner; the upper sealing cylinder (102) is vertically arranged on the side wall of the sealing support (101), and the output end of the upper sealing cylinder is downward; the upper heat sealing block (103) is connected to the output end of the upper sealing cylinder (102); the lower sealing cylinder (104) is vertically arranged at the lower part of the frame (1), and the output end of the lower sealing cylinder is upwards arranged; the lower heat sealing block (105) is connected to the output end of the lower sealing cylinder (104); the pushing mechanism (11) comprises a trough and a pushing block, a product to be packaged is placed in the trough, one side of the trough extends to the outer side of the frame (1), the other side of the trough extends to the outer side of a bag opening of the bag body (A), and after the bag opening of the bag body (A) is opened by the bag opening mechanism (9), the product in the trough is driven by the pushing block through a cylinder to be pushed into the bag opening; the upper sealing cylinder (102) and the lower sealing cylinder (104) respectively drive the upper heat sealing block (103) and the lower heat sealing block (105) to move in opposite directions, so as to clamp and heat seal the bag opening.

8. The dual film bag-forming automatic packaging machine of claim 7, wherein: the lower part of the frame (1) is also provided with a guide box (12), the upper end of the guide box (12) is arranged below the bag body (A), and the lower end of the guide box (12) extends downwards to the front side of the frame (1) in an inclined way; after the sealing of the bag body (A) is finished, the bag body slides into the guide box (12) and slides into the storage box (13) arranged at the front side of the frame (1) along the guide box (12).

9. An automatic packaging process of a double-film bag-forming automatic packaging machine according to claim 1, comprising the following process steps: