Vacuum-package secondary bagging machine and operating method therefor

Abstract

A vacuum-package secondary bagging machine, comprising a packaging-bag conveying line and a material-bag conveying line, wherein the packaging-bag conveying line comprises a supplied-bag conveying mechanism, the supplied-bag conveying mechanism comprises a conveyed-bag conveying belt, a conveying tail end of the conveyed-bag conveying belt aligns with a conveyed-bag deviation rectifying mechanism, an output end of the conveyed-bag deviation rectifying mechanism aligns with a double-station bag-opening and -expanding mechanism, and the double-station bag-opening and -expanding mechanism aligns with two push-into-packaging bag mechanisms which are transversely symmetrically arranged; and the material-bag conveying line comprises a material-bag screening mechanism, the material-bag screening mechanism lifts material bags to the position between the push-into-packaging bag mechanism and the double-station bag-opening and -expanding mechanism by means of a lifting platform, the push-into-packaging bag mechanism pushes the material bags into packaging bags, and in the direction of the material bags entering the packaging bags, a bag heat-sealing and arranging mechanism and a discharging and reversing mechanism are provided in sequence. All the components of the vacuum-package secondary bagging machine cooperate stably and efficiently. Further disclosed is an operating method for a vacuum-package secondary bagging machine.

Description

Vacuum packaging secondary bagging machine and working method thereof TECHNICAL FIELD

[0001] The present application relates to a vacuum packaging secondary bagging machine and working method thereof. BACKGROUND

[0002] The secondary bagging machine is used for secondary packaging of regularly shaped materials after primary filling and vacuumizing, which can effectively reduce the damage probability caused by vacuum packaging during logistics transportation, so as to ensure the hygiene and quality of grain. At present, the secondary bagging link in China is still mainly performed by manual bagging and sealing, which is relatively troublesome and has high labor intensity for workers, low production efficiency, and uneven hygiene, and the labor cost of enterprises is also high.

[0003] The common bag feeding mechanism is manually adjusted to adapt to the size of the packaging bag to ensure smooth centering of the centering cylinder, but manual adjustment is relatively cumbersome and has large errors; there is no limiting mechanism at the front end to limit the position of the moving direction of the packaging bag when it is conveyed to the centering station, which often causes the centering to fail to be guaranteed at the appropriate position, i.e., the position cannot be properly adjusted for smooth completion of packaging, and the cooperation between the centering station and the bag opening station needs to be improved, and the efficiency is insufficient.

[0004] In the secondary bagging, the bag opening mechanism generally needs to open the bag opening and directly connect to the bag filling station, then loosen the bag opening and reset and repeat, and needs to wait for the completion of the bag filling station after conveying to perform the next bag filling, which has low work efficiency and no bag supporting component in the bag opening station to stably open the bag opening, and the bag opening and bag feeding stability are insufficient.

[0005] The traditional delivery and bag pushing process is complicated, and the bag pushing guide is insufficient, and after the bag is pushed into the bag, it is withdrawn, which will cause the risk of pressing the bag during conveying to the heat sealing station, i.e., causing the heat sealing packaging to fail, which needs to be improved.

[0006] The hardness screening of vacuum secondary packaging for vacuum materials is necessary, and the mainstream implementation method can be roughly divided into two types, which are temporarily referred to as "pressing type" and "width limiting type". The pressing type applies a certain pressure to the material (bag), and observes whether it deforms to distinguish soft and hard. The pressure applying method is various, but considering that excessive pressure will leave marks on the material, therefore, materials with unclear soft and hard characteristics are not screened out. The volume of the pressing type containing the screening mechanism is generally large. The width limiting type provides power by clamping the material with a conveying belt on the left and right sides, and realizes screening with a bottom unsupported conveying line. If the width of the material is less than the preset width, the conveying belt on both sides cannot effectively clamp the material to provide friction force, and the material naturally falls off. However, the natural error of the width of the material often causes the rejection rate to be high.

[0007] From the current market, the difference of vacuum material centering mechanism used in vacuum secondary bagging equipment is mainly the different reference, but almost have the common defects: 1, the vacuum material into the packaging bag depends on the fixed shape of the mold, the shape of the mold is basically the same as the vertical section shape of the material moving direction, once the material rotates 90 degrees, it will inevitably lead to interference, and the centering mechanism cannot effectively detect; 2, the centering mechanism is mostly set after the soft package detection mechanism, the hard package that successfully passes through may become a soft package again due to slow air leakage and other reasons, and if the equipment is suspended for a long time, there is a risk of soft package trying to pass through the mold, and the centering mechanism cannot effectively detect.

[0008] From the current market, the demand for beauty of vacuum secondary bagging is still increasing, and the arrangement of the mouth of the organ bag packaging bag is a major focus of the packaging equipment. Looking at the history of bag arranging, from the initial side blowing to the simple spring lever, to the bionic action completed by the combination of servo motor and pneumatic finger, it is different exploration of bag arranging way. At the same time, the great improvement of the demand for packaging speed of the equipment also determines that the bag arranging action must be simple, fast and effective. Moreover, the packaging bag style is more and more diverse, and the characteristics and distribution of its main material and secondary material are different, which also puts forward greater challenge to the bag arranging mechanism.

[0009] The existing public application [CN] a bag arranging and heat sealing mechanism - CN216035522U, which can meet the heat sealing and folding of the organ bag type packaging bag by arranging and heat sealing the packaging bag with the auxiliary bag arranging rod, but only the top joint of the middle seam, and the size is insufficient, the position is single, and the control force and applicability of the bag mouth deformation are insufficient. Technical problem

[0010] With the development of the vacuum secondary packaging market, more and more secondary vacuum packaging bags adopt the style with a longer pre-sealing edge and embedded plastic handle buckle, and the packaging materials are soft and hard. Due to the material moving direction, the handle buckle of the finished product is often in front when discharging, often with the phenomenon of handle buckle top relying on the transition section or the harder pre-sealing edge being stuck in the gap, causing many conveying problems. Therefore, the first and last reversing mechanism is often additionally set on the production line, and the finished product needs to be started and stopped, which seriously limits the conveying speed. Technical solution

[0011] In view of the shortcomings of the prior art, the technical problem to be solved by the present application is to provide a vacuum packaging secondary bagging machine and its working method, which is not only reasonable in structure, but also convenient and efficient.

[0012] In order to solve the above technical problems, the technical scheme of the present application is: a vacuum packaging secondary bagging machine, comprising a packaging bag conveying line and a material bag conveying line, the packaging bag conveying line comprises a bag feeding conveying mechanism, and a bag feeding rectification mechanism is connected to the conveying end of the bag feeding conveying belt along the bag feeding conveying mechanism, the output end of the bag feeding rectification mechanism is connected to a double-station bag opening and supporting mechanism, and the double-station bag opening and supporting mechanism is respectively connected to two groups of transversely symmetric push bagging mechanisms; the material bag conveying line comprises a material bag screening mechanism, the material bag screening mechanism lifts the material bag to the push bagging mechanism and the double-station bag opening and supporting mechanism through a lifting platform to push the bagging, and a heat sealing and bagging mechanism and a material discharging reversing mechanism are sequentially arranged along the push bagging direction.

[0013] Further, the rectification mechanism comprises a rectification assembly erected above the conveying end of the bag feeding conveying belt, the rectification assembly comprises a transversely extending rectification plate, two rectification cylinder mounting plates symmetrically arranged on the rectification plate are slidably connected to the rectification plate, the two rectification cylinder mounting plates are respectively connected to two groups of screw nuts of a positive and negative tooth integrated screw rod to be driven to slide towards or away from each other, the lower ends of the two rectification cylinder mounting plates are respectively provided with rectification cylinders, the piston ends of the two rectification cylinders are arranged towards each other, and a reverse Z-shaped brush fixing plate is fixedly connected to the end portions of the piston ends, and rectification brushes are fixedly arranged on the bottom ends of the brush fixing plates along the longitudinal extension direction of the brush fixing plates; a limiting assembly for limiting the end portion of the packaging bag is arranged outside the conveying end of the bag feeding conveying belt; a longitudinal extension section is fixedly arranged on the bottom of the brush fixing plate, the longitudinal extension section extends towards the limiting assembly side and vertically downward at the end portion to form a vertical pushing section.

[0014] Further, the screw rod extends transversely and is divided into two sections with opposite rotation directions to connect the two rectification cylinder mounting plates, the screw rod is mounted on the rectification plate through a bearing seat, and one end of the screw rod is driven to rotate by a rectification motor; conveying belt supports are arranged on both sides of the bag feeding conveying belt to support the conveying belt, vertical support plates are fixedly arranged on the transversely opposite sides of the rectification plate and are fixedly connected to the conveying belt supports, and the rectification motor is fixedly arranged on the vertical support plates; the limiting assembly comprises a limiting frame, a limiting cylinder is fixedly arranged below the top end of the limiting frame, a limiting connecting plate is fixedly connected to the top piston end of the limiting cylinder, a plurality of limiting plates are fixedly connected to the limiting connecting plate along the transverse length direction of the limiting connecting plate and extend out of the limiting frame at the longitudinal ends of the limiting connecting plate, and the limiting plates vertically extend upwards to abut against the end portion of the packaging bag; a guide sliding plate is fixedly arranged on the top surface of the limiting frame, the guide sliding plate extends obliquely downwards on the side close to the bag feeding conveying belt to form an inclined plate for guiding between the limiting frame and the bag feeding conveying frame, and the inclined plate is arranged along the transverse width direction of the bag feeding conveying belt; a letting opening for the subsequent bag opening and supporting station to suck and stretch the upper and lower layers of the packaging bag is arranged on the side away from the bag feeding conveying belt and the limiting connecting plate of the top of the limiting frame, at least one group of the letting openings are arranged and are arranged in a staggered manner with the limiting plates, and a bag supporting rod horizontally extends towards the double-station bag opening and supporting mechanism.

[0015] Further, the double-station bag opening and supporting mechanism comprises a bag opening assembly and a bag supporting mechanism which slides transversely and is connected to the conveying end of the bag opening assembly in double-station, the bag opening assembly comprises a bag opening fixing frame and a bag opening support which slides longitudinally on the bag opening fixing frame, the bag opening support is vertically opposite to each other and is provided with an upper bag opening cylinder and a lower bag opening cylinder, the telescopic end of the upper bag opening cylinder and the lower bag opening cylinder is provided with a bag opening suction cup, the bag opening fixing frame is fixedly provided with an opening bag moving cylinder and is connected to the bag opening support to drive the longitudinal sliding; the bag supporting mechanism comprises two groups of bag supporting assemblies, each of which comprises two parallel bag supporting plates which are top-connected to the transverse two sides of the opening of the packaging bag; the bag supporting plate is rotatably connected to the bag supporting bottom plate through the bag supporting crank which is fixedly connected to the side end of the bag supporting plate, the end of the bag supporting crank away from the bag supporting plate is hingedly connected to the piston end of the bag supporting cylinder to drive the bag supporting plate to link and swing; the bag supporting bottom plate is provided with a bag clamping cylinder at the side end of the bag supporting plate to top-connect the packaging bag to the bag supporting plate; the lower end of the bag supporting bottom plate is slidably connected to a transversely extended switching sliding rail through a plurality of sliding blocks, the lower end of the bag supporting bottom plate is further provided with a switching cylinder to drive the transverse sliding to switch the station; the bag supporting bottom plate is provided with a bag sleeving detection switch below the bag supporting and transferring station, the bag supporting bottom plate is correspondingly provided with two groups of notches for the bag sleeving detection switch to detect; the bag opening support is provided with a vacuum generator to drive the bag opening suction cup to suck and release.

[0016] Further, the double-station bag opening and supporting mechanism comprises a bag opening and supporting mechanism which slides transversely and is connected to the conveying end of the bag opening assembly in double-station, the bag opening assembly comprises a bag opening fixing frame and a bag opening support which slides longitudinally on the bag opening fixing frame, the bag opening support is vertically opposite to each other and is provided with an upper bag opening cylinder and a lower bag opening cylinder, the telescopic end of the upper bag opening cylinder and the lower bag opening cylinder is provided with a bag opening suction cup, the bag opening fixing frame is fixedly provided with an opening bag moving cylinder and is connected to the bag opening support to drive the longitudinal sliding; the bag supporting mechanism comprises two groups of bag supporting assemblies, each of which comprises two parallel bag supporting plates which are top-connected to the transverse two sides of the opening of the packaging bag; the bag supporting plate is rotatably connected to the bag supporting bottom plate through the bag supporting crank which is fixedly connected to the side end of the bag supporting plate, the end of the bag supporting crank away from the bag supporting plate is hingedly connected to the piston end of the bag supporting cylinder to drive the bag supporting plate to link and swing; the bag supporting bottom plate is provided with a bag clamping cylinder at the side end of the bag supporting plate to top-connect the packaging bag to the bag supporting plate; the lower end of the bag supporting bottom plate is slidably connected to a transversely extended switching sliding rail through a plurality of sliding blocks, the lower end of the bag supporting bottom plate is further provided with a switching cylinder to drive the transverse sliding to switch the station; the bag supporting bottom plate is provided with a bag sleeving detection switch below the bag supporting and transferring station, the bag supporting bottom plate is correspondingly provided with two groups of notches for the bag sleeving detection switch to detect; the bag opening support is provided with a vacuum generator to drive the bag opening suction cup to suck and release.

[0017] Further, the material bag screening mechanism comprises a feeding conveying belt, a lifting platform and a straight conveying belt are arranged at the discharging end of the feeding conveying belt to connect the discharging end, a driving assembly is arranged on the straight conveying belt to control the up-down swing thereof; a soft bag detection assembly is arranged on the feeding conveying belt, the soft bag detection assembly comprises a material clamp plate, an extendable jacking column is arranged on the material clamp plate to press the material bag; the lifting platform is arranged above the straight conveying belt, the lifting platform is driven to lift by a first cylinder, the feeding side of the lifting platform is connected with or separated from the discharging end of the feeding conveying belt; the first cylinder is arranged at both ends of the lifting platform, the double piston rods of the first cylinder are upwardly fixedly connected with the lifting platform, the cylinder body of the first cylinder is mounted on the external frame; the straight conveying belt is mounted on a conveying belt frame body, the conveying belt frame body is hingedly connected to the external frame at the end side away from the feeding conveying belt, the end side of the conveying belt frame body close to the feeding conveying belt is driven to swing by a second cylinder as the driving assembly, the feeding side of the straight conveying belt is connected with or separated from the discharging end of the feeding conveying belt; the piston rod of the second cylinder is hingedly connected to the conveying belt frame body, the cylinder body of the second cylinder is hingedly connected to the external frame; the feeding conveying belt is horizontally driven; the soft bag detection assembly comprises a fixed frame body above the feeding conveying belt, an open clamp cylinder is fixedly connected to the fixed frame body, the material clamp plate has two plates and is respectively fixedly connected to the two end piston rods of the open clamp cylinder; the material clamp plate has two plates and is arranged above the feeding conveying belt, the two material clamp plates are oppositely arranged; the extendable jacking column is arranged on one of the material clamp plates, a jacking column accommodating through hole is formed in the material clamp plate, a detection extendable cylinder is fixedly connected to the non-clamping surface side of the material, and the jacking column is fixedly connected to the piston rod of the detection extendable cylinder.

[0018] Further, the lifting platform is provided with a material centering mechanism with detection, and the lifting platform is provided with a driving clamping plate and a driven clamping plate on two opposite sides in the material conveying direction respectively, the driving clamping plate and the driven clamping plate are driven to move close to or away from each other by a driving assembly, the driven clamping plate is further connected with a resistance ruler, and the translation direction of the driving clamping plate and the driven clamping plate is perpendicular to the material conveying direction; the bottom of the lifting platform is provided with a mounting plate of the driving assembly, and the mounting plate is provided with a mounting and accommodating opening of the driving clamping plate and the driven clamping plate; the driving assembly comprises a transmission belt mounted on the bottom surface of the mounting plate, and the transmission direction of the transmission belt is the translation direction of the driving clamping plate and the driven clamping plate; one side of the transmission belt is fixedly connected with a first adapter plate, the first adapter plate is fixedly connected with the bottom of the driven clamping plate after passing through the mounting and accommodating opening; the other side of the transmission belt is fixedly connected with a second adapter plate, the second adapter plate is fixedly connected with the bottom of the driving clamping plate after passing through the mounting and accommodating opening; the driving clamping plate and the mounting plate are connected with a sliding block and sliding rail moving pair, and the guiding direction of the sliding block and sliding rail moving pair is the translation direction of the driving clamping plate and the driven clamping plate; the driving assembly further comprises a cylinder, the cylinder body is fixedly connected with the bottom of the mounting plate, and the piston rod of the cylinder is fixedly connected with the bottom of the driving clamping plate; the cylinder body of the resistance ruler is fixedly connected with the bottom of the mounting plate, and the telescopic rod of the resistance ruler is fixedly connected with the bottom of the driven clamping plate.

[0019] Further, the heat sealing bag arranging mechanism comprises two groups of follower plates driven to move towards each other or away from each other in the transverse direction by a motor assembly, the lower end of each follower plate is fixedly connected with a bag arranging claw, the bag arranging claw comprises a transverse position adjusting plate connected with the follower plate, the lower end of the transverse position adjusting plate is connected with a vertical position adjusting plate, the side edge of the vertical position adjusting plate is connected with a longitudinal position adjusting plate, the longitudinal position adjusting plate is in an inverted L shape, and the end of the longitudinal position adjusting plate is circularly chamfered to abut against the folded edge on the side of the middle seam of the packaging bag; a centering assembly is arranged at the heat sealing output end in the longitudinal conveying direction of the packaging bag; the longitudinal end of the longitudinal position adjusting plate, the transverse end of the transverse position adjusting plate and the vertically extending vertical position adjusting plate are all provided with strip-shaped holes in the extending direction thereof, and are all connected and fixed by bolts; the motor assembly comprises a bag arranging motor, a driving pulley, a driven pulley, a synchronous belt and a fixed frame, the back side of the fixed frame is fixedly connected with a heat sealing assembly, the heat sealing assembly comprises a main plate connected with the fixed frame, the upper heat sealing plate and the lower heat sealing plate are driven to move vertically close to or away from each other by a linkage assembly on the main plate, the linkage assembly comprises linkage handles arranged symmetrically in the transverse direction on the main plate, the center of each linkage handle is rotationally connected with the main plate, the inner and outer sides of each linkage handle are respectively hingedly connected with an upper linkage rod and a lower linkage rod, the lower end of each upper linkage rod is connected with the upper heat sealing plate, and the lower linkage rod is connected with the lower heat sealing plate, a linkage cylinder is fixedly arranged on the main plate between the two linkage handles, and the bottom of the piston end of the linkage cylinder is connected with the upper heat sealing plate; the centering assembly comprises an outlet conveying belt, the top plate is supported on the rack on the two sides of the outlet conveying belt by a vertical support rod, the lower end of the top plate is fixedly connected with an opening clamping cylinder, the transverse ends of the opening clamping cylinder are both connected with clamping plates driven to move towards or away from each other by a piston rod, and the bottom end of each clamping plate is fixedly connected with a centering square tube.

[0020] Further, the discharge reversing mechanism comprises a discharge output machine, a reversing mechanism is connected to the output end of the discharge output machine, the reversing mechanism comprises a turnover plate, a power mechanism for driving the turnover plate to turn over is installed on the end of the turnover plate away from the discharge output machine, and a receiving groove is slidably connected to the turnover plate corresponding to the conveying direction of the discharge output machine; the reversing mechanism further comprises left and right symmetrically arranged rotating seats, rotating shafts matched with the rotating seats on the same side are fixedly connected to the left and right sides of the end of the turnover plate away from the discharge output machine, one rotating shaft extends out of the rotating seat and is movably connected to the power mechanism on the extending end; the power mechanism comprises a cylinder support, a turnover cylinder is hingedly connected to the cylinder support, a turnover swing arm is installed on the end of the rotating shaft extending out of the rotating seat, one end of the turnover swing arm is fixed to the end of the rotating shaft extending out of the rotating seat and rotates synchronously with the end of the rotating shaft extending out of the rotating seat, and the other end of the turnover swing arm is hingedly connected to the telescopic end of the turnover cylinder; the slot of the receiving groove faces the end of the turnover plate connected to the discharge output machine, a rodless cylinder for driving the receiving groove to slide is installed on the middle part of the lower plate surface of the turnover plate, a sliding support is slidably connected to the lower plate surface of the turnover plate, the sliding support is fixedly connected to the sliding block on the rodless cylinder, and the sliding support is fixedly connected to the receiving groove; the sliding support comprises a connecting plate, the connecting plate is parallel to the turnover plate, left and right end portions of the connecting plate are provided with connecting wing plates perpendicular to the connecting plate, the left and right sides of the turnover plate are provided with sliding guide holes for the connecting wing plates to pass through and slide, the middle part of the connecting plate is fixedly connected to the sliding block on the rodless cylinder, and the end portions of the connecting wing plates pass through the sliding guide holes and are connected to the same end portions of the receiving groove.

[0021] Further, the receiving groove comprises a support plate, fixed baffle plates are arranged on the left and right ends of the support plate, one side of the two fixed baffle plates is connected through a connecting baffle plate, the side of the support plate away from the connecting baffle plate is slidably connected to the plate surface of the turnover plate, the two fixed baffle plates, the connecting baffle plate, the support plate and the turnover plate form a receiving space; a buffer mechanism is arranged in the receiving space on the support plate, the buffer mechanism comprises a buffer bearing plate, a buffer air cylinder is installed on the support plate, the movable end of the buffer air cylinder is connected to the buffer bearing plate, an auxiliary spring is arranged between the support plate and the buffer bearing plate on the side of the buffer air cylinder; a plurality of guide holes perpendicular to the plate surface of the turnover plate are arranged on the connecting wing plate, a plurality of screws matched with the guide holes are arranged on the connecting wing plate; a swing bracket is installed on the lower plate surface of the end of the turnover plate away from the outfeed output machine, the swing bracket comprises a swing base plate, the swing base plate is parallel to the turnover plate, swing wing plates are symmetrically arranged on the left and right sides of the swing base plate, a rotating shaft is fixed to the outer side of the swing wing plate, the distance between the connecting plate and the turnover plate is smaller than the distance between the swing base plate and the turnover plate; the output port of the outfeed output machine is located above the side between the rotating seats, the outfeed output machine is a conveyor belt, guide baffle plates are arranged on the left and right sides of the conveyor belt, one end of the guide baffle plate extends out of the output port of the conveyor belt and extends towards the direction of the rotating seat on the same side, forming an extension end, a transition plate is connected between the two extension ends and is docked with the output port of the conveyor belt, and the transition plate is docked with the turnover plate.

[0022] A working method of a vacuum packaging secondary bagging machine is performed in the following steps: first, the packaging bag is conveyed to the bag conveying belt along the packaging bag conveying line, then is positioned and corrected by the correction mechanism, and then is opened by the double-station bag opening and supporting mechanism, is longitudinally conveyed to the bag supporting station, and is horizontally moved to be docked with the longitudinal pushing station of the packaging bag pushing mechanism; at the same time, the material bag is conveyed to the material centering mechanism station for centering detection by the material bag screening mechanism, and is waiting for pushing; when the material bag and the packaging bag are in place, the bag supporting assembly on the other station of the double-station bag opening and supporting mechanism is horizontally moved to the correction mechanism to open the bag and move longitudinally; when the material bag is pushed into the packaging bag by the packaging bag pushing mechanism and is conveyed to the heat sealing and bagging mechanism, the double-station bag opening and supporting mechanism is horizontally moved to switch, so that the other side of the material bag is put into the bag, and the bag supporting assembly that has completed the pushing is docked with the correction mechanism again; after the heat sealing is completed, the material is conveyed and discharged by the discharge reversing mechanism. Beneficial effects

[0023] Compared with the prior art, the application has the following beneficial effects: through the design of the double stations, that is, when the first station is in the station of the docking bag supporting mechanism, the second station is docked in one of the bag pushing and bagging stations, and then the horizontal movement is switched, the reciprocating circulation facilitates the increase of work efficiency, the bag opening assembly and the bag supporting assembly are matched efficiently and stably, the components of the vacuum packaging secondary bagging machine are matched stably and efficiently, and the efficient secondary bagging and packaging work is facilitated.

[0024] The application will be further described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a structural schematic diagram of an embodiment of the application;

[0026] Fig. 2 is a schematic diagram of the cooperation between the deviation rectifying mechanism and the double station bag opening and bag supporting mechanism in the embodiment of the application;

[0027] Fig. 3 is a structural schematic diagram of the deviation rectifying mechanism in the embodiment of the application;

[0028] Fig. 4 is a structural schematic diagram of the deviation rectifying assembly in Fig. 3;

[0029] Fig. 5 is a structural schematic diagram of the limiting assembly in Fig. 3;

[0030] Fig. 6 is a structural schematic diagram of the double station bag opening and bag supporting mechanism in the embodiment of the application;

[0031] Fig. 7 is a schematic diagram of the cooperation between the bag opening assembly of the double station bag opening and bag supporting mechanism and the deviation rectifying mechanism;

[0032] Fig. 8 is a structural schematic diagram of the bag supporting mechanism in the double station bag opening and bag supporting mechanism;

[0033] Fig. 9 is a structural schematic diagram of the bag supporting bottom plate in the double station bag opening and bag supporting mechanism;

[0034] Fig. 10 is a structural schematic diagram of the bag pushing mechanism in the embodiment of the application;

[0035] Fig. 11 is an enlarged schematic diagram of X in Fig. 10;

[0036] Fig. 12 is an enlarged schematic diagram of Y in Fig. 10;

[0037] Fig. 13 is a working state schematic diagram one of the material bag screening mechanism;

[0038] Fig. 14 is a working state schematic diagram two of the material bag screening mechanism;

[0039] Fig. 15 is a working state schematic diagram three of the material bag screening mechanism;

[0040] Fig. 16 is a structural schematic diagram one of the soft bag detection assembly;

[0041] Figure 17 is a schematic diagram of the soft package detection component (II).

[0042] Figure 18 is a schematic diagram of the working status of the soft package detection component;

[0043] Figure 19 is a simplified diagram of the air circuit connection between the open clamp cylinder and the telescopic cylinder for testing;

[0044] Figure 20 is a schematic diagram of the structure of a material alignment mechanism with detection.

[0045] Figure 21 is a schematic diagram of the material alignment mechanism with detection (II).

[0046] Figure 22 is a schematic diagram of the heat-sealing bag-making mechanism;

[0047] Figure 23 is a schematic diagram of the structure of the bag sorting component in the heat-sealing bag sorting mechanism;

[0048] Figure 24 is a schematic diagram of the structure of the heat sealing component in the heat sealing bag making mechanism;

[0049] Figure 25 is a schematic diagram of the centering component in the heat-sealing bag-making mechanism;

[0050] Figure 26 is a schematic diagram of the action sequence of the working state in the heat sealing bag sorting mechanism;

[0051] Figure 27 is a schematic diagram of the crease state of the packaging bag in the heat-sealing bag-making mechanism;

[0052] Figure 28 is a schematic diagram of the discharge reversing mechanism.

[0053] Figure 29 is a schematic diagram of the discharge reversing mechanism (II).

[0054] Figure 30 is a schematic diagram of the discharge reversing mechanism.

[0055] Figure 31 is a schematic cross-sectional view of the middle section of the discharge reversing mechanism;

[0056] Figure 32 is a side view of the discharge reversing mechanism;

[0057] Figure 33 is a schematic diagram of the discharge reversing mechanism in use (finished product falling);

[0058] Figure 34 is a schematic diagram of the discharge reversing mechanism in use (the flip plate flips).

[0059] In the diagram: A - Material discharge reversing mechanism, B - Heat sealing and bag sorting mechanism, C - Deviation correction mechanism, D - Dual-station bag opening and supporting mechanism, E - Bag pushing and packaging mechanism, 15 - Material centering mechanism with detection, 27 - Material bag screening mechanism, 28 - Bag supply and conveying mechanism, 29 - Main frame. Embodiments of the present invention

[0060] In order to make the above features and advantages of the present application more obvious and easy to understand, the following specific examples are described in detail below with reference to the accompanying drawings.

[0061] As shown in Figures 1-6, a vacuum packaging secondary bagging machine, a vacuum packaging secondary bagging machine, including a bag conveying line and a material bag conveying line supported and installed via a main frame, the bag conveying line including a bag feeding mechanism, and a bag feeding mechanism is connected to the bag conveying belt conveying end of the bag feeding mechanism, the bag feeding mechanism is connected to the double-station bag opening and supporting mechanism, and the double-station bag opening and supporting mechanism is respectively connected to the two groups of push bagging mechanisms symmetrically arranged in the transverse direction; the material bag conveying line includes a material bag screening mechanism, which lifts the material bag to the push bagging mechanism and the double-station bag opening and supporting mechanism through the lifting platform for push bagging, and is sequentially provided with a heat sealing and bagging mechanism and a material discharge reversing mechanism along the push bagging direction.

[0062] In the embodiment of the present application, the bag feeding mechanism is mainly composed of a bag hanging part and a bag pushing part. The bag hanging part is driven by a pneumatic indexing turntable to rotate four bag hanging rods. The detection signal of the bag taking station is used to detect whether the bag hanging rod has a packaging bag to control the start and stop of the pneumatic indexing disc. The bag hanging turntable is provided with two, which can alternately perform bag feeding operation. When the bag hanging rod of the bag taking station has a packaging bag, the push bag lifting cylinder is lowered to make the push bag fork ready. The packaging bag is pushed to the suction cup direction by the push bag cylinder. When the push bag detection switch above the bag hanging rod detects the front end of the packaging bag, the push bag cylinder stops, and the bag taking suction cup extends to take the bag. After the packaging bag is taken out, the bag is laid flat on the bag conveying belt by the chain bag rod, and then the bag is sent to the bag opening station and centered and positioned by the conveying mechanism. When the bag hanging rod on the bag hanging station finishes taking the packaging bag, the push bag lifting cylinder rises, and the pneumatic indexing disc rotates one station. If no bag is detected after one rotation of the indexing disc, the bag bank switching cylinder acts to switch to another hanging rod turntable.

[0063] In the embodiment of the present application, the correction mechanism includes a correction assembly erected above the conveying end of the bag conveying belt C1, the correction assembly includes a horizontally extending correction plate C3, two correction cylinder mounting plates C4 symmetrically arranged on the correction plate and slidably connected thereto, two correction cylinder mounting plates connected to two groups of screw nuts of the positive and negative tooth integrated screw C5 to be driven to slide towards or away from each other, and the lower end of each correction cylinder mounting plate is provided with a correction cylinder C6, the piston end of each correction cylinder is arranged towards each other and is fixedly connected with a reverse Z-shaped brush fixing plate C7 at the end, and the bottom end of each brush fixing plate is fixedly provided with a correction brush C8 along the longitudinal extension direction thereof; a limiting assembly C9 is arranged outside the conveying end of the bag conveying belt to limit the end of the packaging bag.

[0064] In the embodiment of the present application, the two correction cylinder mounting plates are fixedly connected with sliding blocks, and the sliding blocks are slidably connected with the horizontal sliding rails fixedly arranged on the correction plate.

[0065] In this embodiment of the invention, a longitudinal extension section C10 is fixed at the bottom of the brush fixing plate. The longitudinal extension section extends toward the limiting component and extends vertically downward at the end to form a vertical deflector section C11. Since the horizontal plane of the receiving platform used to receive the output end of the conveyor belt is generally lower than the upper end of the conveyor belt for receiving, the setting of the vertical deflector section allows the packaging bag to be adjusted and the front end of the packaging belt to be limited and aligned by the vertical deflector section during the adjustment process of the correction brush when the packaging bag is sent to the limiting frame by the bag feeding conveyor belt.

[0066] In this embodiment of the invention, the lead screw extends laterally and is divided into two sections with opposite rotation directions to connect with the mounting plates of the two correction cylinders. The lead screw is mounted on the correction plate via a bearing seat, and one end of the lead screw is driven to rotate by the correction motor C12.

[0067] In this embodiment of the invention, conveyor belt supports C13 are provided on both sides of the bag feeding conveyor belt, and vertical support plates C14 are fixed on both sides of the correction plate and are fixed to the conveyor belt supports. The correction motor is fixed on the support plates.

[0068] In this embodiment of the invention, the limiting component includes an I-shaped limiting frame C15, a limiting cylinder C16 fixedly disposed below the top of the limiting frame, a limiting connecting plate C17 fixedly connected to the piston end of the top of the limiting cylinder, a plurality of limiting plates C18 fixedly connected at intervals along the transverse length direction of the limiting connecting plate extending out of the limiting frame, and all the limiting plates extending vertically upward to limit the end of the packaging bag by abutting its longitudinal end face.

[0069] In this embodiment of the invention, a guide slide C19 is fixedly provided on the top surface of the limiting frame. The guide slide extends obliquely downward on the side near the bag conveyor belt, and an inclined plate C20 is provided for guiding between the limiting frame and the bag conveyor frame. The inclined plate is arranged along the same length as the bag conveyor belt in the lateral width direction. The inclined plate can effectively prevent the conveyor belt from getting stuck between the limiting frame and the bag conveyor frame or falling off at the gap.

[0070] In this embodiment of the invention, the top of the limiting frame is provided with a clearance opening C21 on the side away from the bag feeding conveyor belt and on the limiting plate, which is provided for the subsequent bag stretching station to absorb the upper and lower layers of the packaging bag for tensioning. At least one clearance opening is provided and is offset from the limiting plate.

[0071] The working principle of the deviation rectifying mechanism in the embodiment of the present application is as follows: first, the position of the deviation rectifying cylinder mounting plate is set according to the width of the packaging bag, that is, the interval between the two deviation rectifying cylinder mounting plates is reduced or increased synchronously by rotating the screw rod to adapt to packaging bags of different widths; after the packaging bag is conveyed by the bag conveying belt, part of the packaging bag reaches the limiting frame and is limited by the limiting plate; then the bag conveying belt stops, the two deviation rectifying cylinders are started, and the deviation rectifying brushes are moved towards each other to adjust the position of the packaging bag and keep it in the middle; the vertical shifting section is used to limit and adjust the front end of the packaging belt; after deviation rectification, the limiting cylinder retracts to move the limiting plate downward; at the same time, the suction cups of the bag opening station are used to suck the upper and lower layers of the packaging bag at the gap, and the packaging bag is moved and subjected to subsequent bag opening operation; and the packaging bag is longitudinally moved out of the limiting frame, and since the limiting plate is arranged in a staggered manner, the limiting plate does not interfere with the packaging bag.

[0072] In the embodiment of the present application, the double-station bag opening and supporting mechanism comprises a bag opening assembly D1 and a bag supporting mechanism D2 which is horizontally shifted and connected to the conveying end of the bag opening assembly in double stations, the bag opening assembly comprises a bag opening fixed frame D3 and a bag opening support D5 which is longitudinally shifted on the bag opening fixed frame through a bag opening sliding rail D4, an upper bag opening cylinder D6 and a lower bag opening cylinder D7 are vertically arranged in the bag opening support, a bag opening suction cup D8 is arranged at the extension end of the upper bag opening cylinder and the lower bag opening cylinder, a bag opening moving cylinder D9 is fixedly arranged on the bag opening fixed frame and connected to the bag opening support to drive longitudinal shifting; the bag supporting mechanism comprises two groups of bag supporting assemblies D10, each of which comprises two parallel bag supporting plates D11 arranged to abut on the transverse two sides of the opening of the packaging bag; the double-station bag supporting mechanism corresponds to two groups of material loading mechanisms, that is, when the first station is connected to the station of the bag supporting mechanism, the second station is connected to one of the material loading stations, and then the horizontal shifting is switched, and the reciprocating circulation increases the bag loading efficiency; for different specifications of packaging bags, only the bag supporting plates need to be replaced to adapt to different specifications of packaging bags.

[0073] In the embodiment of the present application, the bag supporting plates are rotationally connected to the bag supporting bottom plate D13 through the bag supporting cranks D12 fixedly connected to the side ends of the bag supporting plates, the middle parts of the bag supporting cranks are rotationally connected to the bag supporting bottom plate, and the ends of the bag supporting cranks away from the bag supporting plates are hingedly connected to the piston ends of the bag supporting cylinders D14 to drive the bag supporting plates to link and swing.

[0074] In the embodiment of the present application, the bag supporting bottom plate is provided with a bag clamping cylinder D15 at the side end of each bag supporting plate to abut the packaging bag on the bag supporting plate, and the piston end of the bag clamping cylinder is fixedly provided with a bag clamping silica gel D16 to facilitate clamping.

[0075] In the embodiment of the present application, the upper surface of the bag supporting bottom plate is provided with a limiting groove D17 to limit the swing of the bag supporting plate.

[0076] In the embodiment of the present application, the lower end of the bag supporting bottom plate is slidably connected to a transversely extending switching slide rail D18 through sliding blocks, and the lower end of the bag supporting bottom plate is further provided with a switching cylinder D19 for driving the transverse sliding of the bag supporting bottom plate to switch the working position.

[0077] In the embodiment of the present application, the bag supporting bottom plate is provided with bag detection switches D20 below the bag transferring working position, and two groups of notches D21 are formed on the bag supporting bottom plate for the bag detection switches to detect.

[0078] In the embodiment of the present application, the bag opening support is provided with a vacuum generator D22 for driving the suction and release of the bag opening suction cup, and the vacuum generator is connected to the bag opening suction cup through a pipeline.

[0079] In the embodiment of the present application, the feeding end of the bag opening assembly is connected to a feeding deviation correcting mechanism, and a bag supporting rod D23 is arranged between the feeding deviation correcting mechanism and the bag opening assembly to support the packaging bag.

[0080] The working principle of the double-position bag opening and supporting mechanism in the embodiment of the present application is as follows: first, the packaging bag is pressed and clamped by the opposite extension of the upper bag opening cylinder and the lower bag opening cylinder, and the vacuum generator is started at the same time to form a negative pressure environment in the bag opening suction cup and the corresponding vacuum pipeline in time, and the bag opening suction cup grasps the surface of the packaging bag on one side after contacting the outer bag. After the bag opening suction cup grasps the surface of the packaging bag, the lower bag opening cylinder is completely retracted, and the upper bag opening cylinder is lifted to the corresponding height according to the needs to realize the bag opening. After the bag opening, the bag is transversely moved by the bag opening moving cylinder and supported by the bag supporting rod, and then the bag is connected to the bag supporting assembly. At this time, the bag supporting cylinder of the working position is retracted to unfold the bag supporting plate to support the two sides of the bag opening, and the bag clamping cylinder is extended to clamp and fix the packaging bag on the bag supporting plate for transverse transfer. After clamping and fixing, the switching cylinder is started to transversely move the bag supporting assembly of the working position to the packaging bag pushing mechanism on the same side, and the idle bag supporting assembly of the other side is transversely moved to the working position of the bag supporting assembly at the same time, and the cycle is repeated to realize high efficiency and convenience.

[0081] In the embodiment of the present application, the packaging bag pushing mechanism comprises a packaging bag pushing assembly E6 for pushing the material package on the lifting platform into the packaging bag supported by the double-position bag opening and supporting mechanism, the packaging bag pushing assembly comprises a longitudinally extending longitudinal frame E7, a longitudinally extending packaging bag pushing slide rail E8 is fixedly arranged on the longitudinal frame, and a longitudinal pushing plate E9 is slidably arranged on the packaging bag pushing slide rail and driven by a driving member, an L-shaped packaging bag pushing plate E10 is vertically slidably connected to the longitudinal pushing plate, a reset cylinder E11 is arranged on the longitudinal pushing plate to drive the vertical sliding of the packaging bag pushing plate, and a packaging bag pushing channel supporting plate E12 is arranged below the pushing end of the packaging bag pushing assembly to support the material package and the packaging bag and push them to the next working position.

[0082] In the embodiment of the present application, the upper surface of the pushing channel base plate is provided with a square boosting port E13 at the pushing end of the pushing assembly, and a boosting plate E14 is arranged in the square boosting port. The end of the boosting plate is driven to slide longitudinally by a boosting air cylinder E15 to drag the material package and the packaging bag to the heat sealing station. The boosting air cylinder is fixedly connected to the lower end surface of the boosting plate.

[0083] In the embodiment of the present application, the driving member is composed of a synchronous belt E16, a pushing motor E17 and two belt pulleys E18. The longitudinal pushing plate is fixedly connected to the synchronous belt and driven to move longitudinally by the synchronous belt transmission driven by the pushing motor.

[0084] In the embodiment of the present application, the horizontal section of the pushing plate is fixedly provided with a pushing rubber block E19 which is beneficial to pushing.

[0085] In the embodiment of the present application, the bag supporting assembly comprises a bag supporting plate E20 which extends into the packaging bag and is supported on the lateral sides of the bag opening. The bag supporting plate is fixedly connected to the pushing guide plate E21 which is beneficial to guiding on the top and the side near the lifting assembly. The pushing guide plate is outwardly expanded in an open manner.

[0086] In the embodiment of the present application, the lifting assembly comprises a lifting plate E22 which is provided with a lifting air cylinder E23 at the lower end of the lateral sides to drive the lifting of the lifting plate.

[0087] In the embodiment of the present application, the detection switch E24 is arranged on the longitudinal frame above the bag supporting assembly to detect whether the bag is supported.

[0088] In the embodiment of the present application, the bag supporting assembly further comprises a bag clamping air cylinder E25 which is arranged at the side end of the bag supporting plate to transversely crimp the packaging belt on the bag supporting plate.

[0089] In the embodiment of the present application, the bag supporting plate is rotatably connected to the bag supporting base plate D13 through the bag supporting crank D12 fixedly connected to the side end of the bag supporting plate. The middle part of the bag supporting crank is rotatably connected to the bag supporting base plate. The end of the bag supporting crank away from the bag supporting plate is hingedly connected to the piston end of the bag supporting air cylinder D14 to drive the linkage swing of the bag supporting plate.

[0090] The working principle of the material package and packaging bag pushing mechanism in the embodiment of the present application is as follows. First, when the material package is conveyed to the lifting plate, the packaging bag is opened by the bag opening plate and transversely moved to the bag entering station. Then, the lifting air cylinder is extended to push the material package to the same horizontal position as the packaging bag. Then, the pushing motor is rotated to drive the longitudinal pushing plate to move on the longitudinal frame. Then, the material package on the lifting plate is pushed into the packaging bag by the pushing plate along the pushing guide plate and the bag supporting plate. After entering, the bag clamping air cylinder is retracted, and the pushing plate continuously pushes the material package into the bag to the end, so that the material package is located on the boosting plate. Then, the boosting air cylinder drives the longitudinal movement of the boosting plate to the subsequent heat sealing station for sealing.

[0091] In the embodiment of the present application, on the material bag conveying line, the material bag screening mechanism comprises an input conveying belt 1, the output end of the input conveying belt is provided with a lifting platform 2 and a straight-through conveying belt 3 for connecting the output, the straight-through conveying belt is provided with a driving assembly for controlling the up-down swing thereof; the input conveying belt is provided with a soft bag detection assembly 4, the soft bag detection assembly comprises a material clamping plate 5, the material clamping plate is provided with a telescopic jacking column 6 for pressing the material (material bag).

[0092] The soft bag detection assembly of the present application basically adopts a pressing type. Different from the common pressing type, the pressure is divided into two parts, the first part is the large-area pressing of the material clamping plate, the pressure is not required, and it is more to determine the reference and position the material; the second part is the pressing of the telescopic jacking column, the pressure is relatively large, and the telescopic jacking column adopts a rubber head, which causes little damage to the material. In addition, the mechanism is additionally provided with a lifting platform and a straight-through conveying belt as a screening method, so that the flow direction of the material has more choices.

[0093] In the embodiment of the present application, the lifting platform is arranged above the straight-through conveying belt, and the lifting platform is driven to lift by a first cylinder 7, so as to connect or separate the input side of the lifting platform and the output end of the input conveying belt.

[0094] In the embodiment of the present application, the first cylinder is arranged at both ends of the lifting platform, the double piston rods of the first cylinder are upwardly fixedly connected to the lifting platform, and the cylinder body of the first cylinder is mounted on the external frame.

[0095] In the embodiment of the present application, the straight-through conveying belt is mounted on a conveying belt frame body 8, the end side of the conveying belt frame body away from the input conveying belt is hinged to the external frame, and the end side of the conveying belt frame body close to the input conveying belt is driven to swing by a second cylinder 9 as a driving assembly, so as to connect or separate the input side of the straight-through conveying belt and the output end of the input conveying belt.

[0096] In the embodiment of the present application, the piston rod of the second cylinder is hinged to the conveying belt frame body, and the cylinder body of the second cylinder is hinged to the external frame.

[0097] In the embodiment of the present application, the input conveying belt is horizontally driven.

[0098] In the embodiment of the present application, the soft bag detection assembly comprises a fixed frame body 10 above the input conveying belt, the fixed frame body is fixedly connected with an open clamping cylinder 11, and the material clamping plate has two plates and is respectively fixedly connected to the two end piston rods of the open clamping cylinder.

[0099] In the embodiment of the present application, the material clamping plate has two plates and is arranged above the input conveying belt, and the two material clamping plates are oppositely arranged.

[0100] In the embodiment of the present application, the telescopic top post is arranged on one of the material clamping plates, a top post accommodating through hole 12 is formed in the material clamping plate, and a detection telescopic cylinder 13 is fixedly connected to the non-clamping surface side of the material.

[0101] In the embodiment of the present application, the working principle of the multi-channel material screening mechanism is as follows:

[0102] 1. As shown in FIGS. 13-15, FIGS. 13-15 are three working modes of the mechanism. In the general working mode of FIG. 13, the detected material enters the lifting platform and goes to the upper layer for packaging operation. In the rejection mode of FIG. 14, the material needs to be screened out, at this time, the unqualified material falls into the straight-through conveying belt, and the straight-through conveying belt is temporarily reversed (counterclockwise) to send the material to the lower side of the feeding conveying belt. In the straight-through conveying mode of FIG. 15, the straight-through conveying belt connects the feeding conveying belt, the straight-through conveying belt is forward rotated (clockwise), and the material directly passes through the equipment. For the product without secondary bagging, it skips this process and directly enters the next process of the production line. At this time, the material does not need to be screened, and there is no problem of occupied screening function.

[0103] 2. The soft package detection assembly principle: FIGS. 16 and 17 respectively represent the retracted and opened two states. As shown in FIG. 19, the open clamp cylinder on the gas circuit is connected in parallel with the detection telescopic cylinder and synchronously acts. When the open clamp is clamped, the top post is extended, at this time, if there is no obstruction, the top post will exceed the material clamping surface. When the open clamp is opened, the top post is retracted, at this time, the top post is retracted into the material clamping surface. When there is material (material package) 14 and the material hardness is sufficient, the top post will be flush with the material clamping surface, the detection telescopic cylinder is moved to the fixed stroke position, and only at this moment it is determined that the material is qualified.

[0104] 3. As shown in FIG. 19, the open clamp cylinder and the detection telescopic cylinder are synchronously pressure-regulated, the cylinder diameter of the open clamp cylinder is slightly larger than that of the detection telescopic cylinder, that is, it can be ensured that the top post will not reversely open the open clamp cylinder. And according to the material hardness detection standard, the pressure regulating table is adjusted, which can adapt to the hardness requirements.

[0105] In the embodiment of the present application, the lifting platform is provided with a material centering mechanism with detection 15, the lifting platform is provided with a driving clamping plate 16 and a driven clamping plate 17 on the two opposite sides in the material conveying direction, respectively, the driving clamping plate and the driven clamping plate are driven to approach or move away by a driving assembly, and the driven clamping plate is further connected with a resistance ruler 18 for real-time detection of the position.

[0106] The material centering mechanism with detection can judge whether the posture of the incoming six-sided vacuum material meets the requirements, and can detect the accidentally soft vacuum material when the equipment is paused.

[0107] In the embodiment of the present application, the translation direction of the active clamp plate and the driven clamp plate is perpendicular to the material conveying direction.

[0108] In the embodiment of the present application, the bottom of the material parking plate is provided with a mounting plate 19 of the driving assembly, and the mounting plate is provided with a mounting and accommodating opening 20 of the active clamp plate and the driven clamp plate.

[0109] In the embodiment of the present application, the driving assembly comprises a transmission belt 21 mounted on the bottom surface of the mounting plate, and the transmission direction of the transmission belt is the translation direction of the active clamp plate and the driven clamp plate.

[0110] In the embodiment of the present application, one side of the transmission belt is fixedly connected with a first adapter plate 22, and the first adapter plate is fixedly connected with the bottom of the driven clamp plate after passing through the mounting and accommodating opening; the other side of the transmission belt is fixedly connected with a second adapter plate 23, and the second adapter plate is fixedly connected with the bottom of the active clamp plate after passing through the mounting and accommodating opening.

[0111] In the embodiment of the present application, the active clamp plate and the mounting plate, and the driven clamp plate and the mounting plate are connected with a sliding block and sliding rail moving pair 24, and the guide direction of the sliding block and sliding rail moving pair is the translation direction of the active clamp plate and the driven clamp plate.

[0112] In the embodiment of the present application, the driving assembly further comprises a cylinder 25, the cylinder body of which is fixedly connected with the bottom of the mounting plate, and the piston rod of the cylinder is fixedly connected with the bottom of the active clamp plate.

[0113] In the embodiment of the present application, the cylinder body of the resistance gauge is fixedly connected with the bottom of the mounting plate, and the telescopic rod of the resistance gauge is fixedly connected with the bottom of the driven clamp plate.

[0114] In the embodiment of the present application, the active clamp plate and the driven clamp plate are symmetrically arranged along the center line position of the material conveying direction.

[0115] In the embodiment of the present application, the resistance gauge is electrically connected with the control module.

[0116] In the embodiment of the present application, the working principle of the material centering mechanism with belt detection is as follows:

[0117] The material centering mechanism with belt detection is powered by a cylinder, driven by a transmission belt, supported and guided by a sliding block and sliding rail moving pair, and matched with a resistance gauge to detect the material state. Specifically, the working principle is as follows:

[0118] When the mechanism is ready, the cylinder extends, the driving clamping plate and the driven clamping plate move away from each other, open to the maximum, and completely give way to the material parking channel on the material parking plate, waiting for the arrival of the material. When the six-surface vacuum material arrives at the material parking channel of the material parking plate on the mechanism, the cylinder retracts, and the driving clamping plate and the driven clamping plate on both sides are driven by the transmission belt to move synchronously to the middle symmetry line, and push the material to correct the posture. After the six-surface vacuum material is completely clamped by the driving clamping plate and the driven clamping plate, the distance L between the driving clamping plate and the driven clamping plate depends on the distance between the two parallel surfaces of the clamped six-surface vacuum material. At this time, the position of the driven clamping plate is read by the resistance gauge, and the actual distance L can be calculated.

[0119] For the six-surface vacuum material formed by the fixed mold, the length, width and height size fluctuation is generally within ±3mm, and the length and width of most specifications of the formed material differ by more than 30mm. If the material becomes soft, the amount of deformation under pressure is usually not less than 30mm, and the distinguishing features are very obvious. Therefore, by comparing the actual distance L and the pre-set theoretical distance L0, the absolute value of the difference between the two can be calculated, so as to determine whether the material state is normal. It can effectively avoid serious material and mold interference events, and also can play a self-checking role of the correspondence between the packaging specifications and the material.

[0120] In the embodiment of the present application, the heat sealing bag arranging mechanism includes two groups of driven plates B1 driven to move towards each other or away from each other in the transverse direction by a motor assembly, and a bag arranging claw B2 fixed to the lower end of each driven plate. The bag arranging claw includes a transverse positioning plate B3 connected with the driven plate, a vertical positioning plate B4 connected to the lower end of the transverse positioning plate, and a longitudinal positioning plate B5 connected to the side edge of the vertical positioning plate. The longitudinal positioning plate is in an inverted L shape, and the end of the longitudinal positioning plate is a circular arc chamfer B6 to top the folded edges on both sides of the middle seam of the packaging bag. A centering assembly B7 is arranged at the heat sealing output end along the longitudinal conveying direction of the packaging bag, and the motor assembly and the bag arranging claw form a bag arranging assembly B37.

[0121] In the embodiment of the present application, the longitudinal end of the longitudinal positioning plate, the transverse end of the transverse positioning plate, and the vertically extending vertical positioning plate are all provided with strip-shaped holes B8 for adjustment along the extension direction, and are all connected and fixed by bolts.

[0122] In the embodiment of the present application, the motor assembly includes a bag arranging motor B9, a driving pulley B10, a driven pulley B11, a synchronous belt B12, and a fixed frame B13. The synchronous belt is wound around the driving pulley and the driven pulley, and the motor drives the driving pulley to rotate. The top end of the driven plate is fixed to the two sides of the synchronous belt, and the bag arranging motor is fixed to the fixed frame.

[0123] In the embodiment of the present application, the fixed frame is fixedly connected with a heat sealing assembly B14 on the back side, which comprises a main plate B15 connected with the fixed frame, and an upper heat sealing plate B38 and a lower heat sealing plate B39 vertically close to or away from each other driven by a linkage assembly B16 on the main plate, wherein the linkage assembly comprises linkage handles B17 symmetrically arranged on the main plate, the linkage handles are rotatably connected with the main plate at the center, and the linkage handles are respectively hingedly connected with upper linkage rods B18 and lower linkage rods B19 on the inner and outer sides, the lower ends of the upper linkage rods are connected with the upper heat sealing plate, the lower linkage rods are connected with the lower heat sealing plate, and a linkage cylinder B20 is fixedly arranged on the main plate between the linkage handles, and the bottom of the piston end of the linkage cylinder is connected with the upper heat sealing plate.

[0124] In the embodiment of the present application, the back side of the main plate is slidably connected with a vertical sliding rail B22 on an adjusting plate through a sliding block B21, a ball screw pair B23 is fixedly arranged on the adjusting plate and connected with the main plate through a screw nut to upgrade the adjustment.

[0125] In the embodiment of the present application, the fixed frame is fixedly provided with a transverse sliding rail B24 along the transverse extension direction, and transverse sliding blocks B25 are fixedly connected with the transverse adjusting plate and slidably connected with the transverse sliding rail through the transverse sliding blocks.

[0126] In the embodiment of the present application, the fixed frame is provided with an inductive switch 26 along the transverse extension direction, and the inductive switch is respectively provided with an inner limit switch B27, an original point switch B28 and an outer limit switch B29 from inside to outside, and a position inductive strip B30 is fixedly connected with the upper end of one of the bagging claws.

[0127] In the embodiment of the present application, the centering assembly comprises an outfeed conveyor belt B31, and the racks on both sides of the outfeed conveyor belt are supported by a top plate B33 through vertical support rods B32, an opening clamp cylinder B34 is fixedly connected with the lower end of the top plate, clamping plates B35 driven to move towards or away from each other are connected with the transverse ends of the opening clamp cylinder through piston rods, and centering square tubes B36 are fixedly connected with the bottom ends of the clamping plates.

[0128] The functions realized by the mechanism are heat sealing height adjustment, bag opening arrangement and collection and heat sealing. The height adjustment is powered by the lifting motor at the top end of the ball screw pair, guided by the guide rail sliding block and transmitted by the screw nut. The bag opening collection requires the symmetrical action of the upper heat sealing plate and the lower heat sealing plate relative to the expected horizontal plane, so a pair of linkage handles are adopted to ensure the symmetry of the action and the consistency of the action speed. The mechanism is powered by the cylinder and guided by the guide rail sliding block.

[0129] The centering assembly mainly realizes the centering positioning and fixing of the material packaging bag, and helps the material to be accurately stopped in the predetermined processing position, and plays a role similar to a damper. The position of the material stopping on the material processing platform directly affects the position of the heat sealing part falling on the packaging bag, and also directly determines whether the bag arranging claw can apply the same deformation to the two sides of the concertina. The part of the mechanism directly contacting with the material is a smooth stainless steel square tube, and the thin square tube can adapt to different material thicknesses. The centering action is powered by an open clamp air cylinder.

[0130] The bag arranging part is connected to the main plate of the heat sealing assembly and synchronously rises and falls with the heat sealing assembly to ensure that it is synchronized with the heat sealing level. The bag arranging claw needs to apply the same degree of influence to both sides of the packaging bag, so a synchronous belt is used as the transmission, and a guide rail slider is used to guide the action. The power is selected as a servo motor, and the flexible bag arranging claw action can fully cooperate with the bag opening collection, and adapt to packaging bags with different characteristics.

[0131] The bag arranging action is completed under the cooperation of the bag arranging claw and the upper and lower heat sealing plates, as shown in FIG. 26. After the concertina edge is initially deformed by the bag arranging claw, the heat sealing plate starts to contact the upper and lower edges of the packaging bag, at which time the bag arranging claw selects to stay or immediately exit according to the situation. Generally, the harder bag can ensure the concertina edge to be neatly folded and collected under the guidance of the initial deformation, while the softer bag needs to be supported by the bag arranging claw.

[0132] As shown in FIG. 27, it is a schematic diagram of the deformation of the concertina bag opening folding. As can be seen, in addition to the initial center seam, two new (diagonal) creases (thickened part) are formed. Common bag arranging mechanisms are all pressing the center seam to initiate the initial deformation, which cannot effectively control the shape of the deformation corner, and finally leads to uncontrollable sealing effect. The point cooperation longitudinal positioning plate acting symmetrically on both sides of the center seam can not only control the position of the (diagonal) crease formation, but also still control the folding depth of the center seam. The control force of the bag opening deformation is greatly strengthened.

[0133] In the embodiment of the present application, the discharging reversing mechanism comprises a discharging output machine A1, the output end of the discharging output machine is connected with a reversing mechanism A2, the reversing mechanism comprises a turnover plate A3, a power mechanism A4 for driving the turnover plate to turn over is installed on the end of the turnover plate away from the discharging output machine, a receiving groove A5 corresponding to the conveying direction of the discharging output machine is slidably connected on the turnover plate, when in use, an output conveyor belt A28 different from the output direction of the discharging output machine is arranged below the discharging output machine, the turnover plate of the reversing mechanism can swing and connect between the discharging output machine and the output conveyor belt, the reversing mechanism is located at the side of the output conveyor belt, when the turnover plate is horizontal, the turnover plate connects with the output conveyor belt, when the turnover plate is upturned, the turnover plate connects with the discharging output machine, when in use, first, the turnover plate connects with the discharging output machine, the finished product A30 output by the discharging output machine falls on the receiving groove of the turnover plate, then the turnover plate is turned over to be horizontal under the action of the power mechanism, the turnover plate connects with the output conveyor belt, the receiving groove pushes the finished product into the output conveyor belt, and the reversing is realized.

[0134] In the embodiment, in order to realize the swing of the reversing mechanism, the reversing mechanism further comprises left and right symmetrical rotating seats A6, the rotating shafts A7 matched with the rotating seats on the same side are fixedly connected on the left and right sides of the end of the turnover plate away from the discharging output machine, one rotating shaft extends out of the rotating seat, the extending end is movably connected with the power mechanism, one rotating shaft is driven to rotate through the power mechanism, and then the whole turnover plate is swung; the specific structure of the power mechanism is that the power mechanism comprises a cylinder support A8, a turnover cylinder A9 is hingedly connected on the cylinder support, a turnover swing arm A10 is installed on the end of the rotating shaft extending out of the rotating seat, one end of the turnover swing arm is fixed on the end of the rotating shaft extending out of the rotating seat and synchronously rotates with the end of the rotating shaft extending out of the rotating seat, the other end of the turnover swing arm is hingedly connected with the extending end of the turnover cylinder, that is, the turnover swing arm plays a role of a crank, the turnover swing arm is swung through the turnover cylinder, and then the turnover plate is swung, meanwhile, the cylinder support and the rotating seat are fixed on the rack of the packaging machine.

[0135] In the embodiment, in order to realize the sliding of the receiving groove, the slot of the receiving groove is towards the end of the turnover plate which is connected with the discharging output machine, a existing rodless cylinder A11 is installed on the middle part of the lower surface of the turnover plate for driving the sliding of the receiving groove, the sliding direction of the slider of the rodless cylinder corresponds to the output direction of the discharging output machine, a sliding support A12 is slidably connected on the lower surface of the turnover plate, the sliding support is fixedly connected with the slider A13 of the rodless cylinder, the sliding support is fixedly connected with the receiving groove, the movement of the sliding support is realized by the sliding of the slider of the rodless cylinder, and then the movement of the receiving groove is driven, more specifically, the sliding support comprises a connecting plate, the connecting plate A14 is parallel to the turnover plate, the connecting plate is located below the turnover plate, connecting wing plates A15 are arranged on the left and right ends of the connecting plate, the connecting wing plates are perpendicular to the connecting plate, sliding guide holes A16 for the connecting wing plates to pass through and slide are arranged on the left and right sides of the receiving groove on the turnover plate, the length direction of the sliding guide holes is parallel to the sliding direction of the slider of the rodless cylinder, the slider of the rodless cylinder is fixedly connected with the middle part of the connecting plate, and the slider is located between the two connecting wing plates, the end part of the connecting wing plate passes through the sliding guide hole and is connected with the end part of the receiving groove on the same side, that is, the sliding of the connecting plate is driven by the sliding of the slider of the rodless cylinder, and then the sliding of the connecting wing plate is driven, so that the sliding of the receiving groove is realized.

[0136] In the embodiment, the specific structure of the receiving groove is that the receiving groove comprises a support plate A17, fixed baffle plates A18 are arranged on the left and right ends of the support plate, one side between the two fixed baffle plates is connected through a connecting baffle A29, the side of the support plate away from the connecting baffle is slidably connected on the upper surface of the turnover plate, the two fixed baffle plates, the connecting baffle, the support plate and the turnover plate surround a receiving space, that is, the plate body of the support plate is perpendicular to the upper surface of the turnover plate, and the opening of the receiving space is towards the end of the turnover plate which is connected with the discharging output machine.

[0137] In the embodiment, in order to realize the buffering of the receiving groove to the finished product and avoid the damage of the finished product when falling, a buffering mechanism is arranged in the receiving space on the support plate, the buffering mechanism comprises a buffering carrier plate A19, an existing buffering cylinder A20 is installed on the support plate, the movable end of the buffering cylinder is connected with the buffering carrier plate, in use, after the finished product falls, the finished product is sent into the receiving groove along the turnover plate, and then collides with the buffering carrier plate, the impact force of the collision drives the buffering cylinder to retract, so that buffering is realized, and at the same time, the rodless cylinder can also be lowered synchronously, so that buffering is further realized, an auxiliary spring A21 is arranged on the side of the buffering cylinder between the support plate and the buffering carrier plate, the auxiliary spring is used for resetting the buffering cylinder, and at the same time, a buffering pad such as a rubber pad can be installed on the side of the buffering carrier plate which is towards the finished product, so that the damage of the finished product when falling is further avoided.

[0138] In this embodiment, in order to make the receiving groove adaptable to a variety of different specifications of finished products, the connecting wing plate is provided with a number of guide holes A22 perpendicular to the surface of the flip plate, and the connecting wing plate is provided with a number of screws that cooperate with the guide holes. That is, by sliding and locking the screws on the guide holes, the size of the receiving space can be adjusted to adapt to a variety of different specifications of finished products.

[0139] In this embodiment, a swing bracket A23 is installed on the lower plate surface of the end of the tilting plate away from the discharge output machine. The swing bracket includes a swing base plate A24, which is parallel to the tilting plate. Swing wing plates A25 are symmetrically arranged on the left and right sides of the swing base plate. The rotation shaft is fixed to the outside of the swing wing plates. The swing bracket enables the rotation shaft to drive the tilting plate to rotate. At the same time, in order to avoid interference, the distance between the connecting plate and the tilting plate is smaller than the distance between the swing base plate and the tilting plate, and the distance between the two connecting wing plates is smaller than the distance between the two swing wing plates.

[0140] In this embodiment, in order to achieve docking between the discharge output machine and the tilting plate, the output port of the discharge output machine is located above the rotating seat on the side. The discharge output machine is a conveyor belt. Guide baffles A26 are provided on the left and right sides of the conveyor belt. One end of the guide baffle extends out of the conveyor belt output port and extends towards the rotating seat on the same side to form an extension end. A transition plate A27 that docks with the conveyor belt output port is connected between the two extension ends. The transition plate docks with the tilting plate.

[0141] In this embodiment, during initial use, the tilting plate tilts upwards, and the receiving chute stops in the middle of the tilting plate, waiting for the finished product to be sent out by the conveyor. When the finished product arrives at the tilting plate and slides down, the receiving chute moves down synchronously, causing it to brake slowly to prevent impact damage to the finished product. Finally, the tilting cylinder drives the tilting swing arm, causing the tilting plate to fall to a horizontal position, and the receiving chute pushes out the finished product, completing the discharge action. This not only folds the conveying space but also allows the material to be quickly reversed.

[0142] The working method of the vacuum packaging secondary bagging machine is performed according to the following steps: first, the packaging bag is conveyed to the bag conveying belt along the packaging bag conveying line, then is adjusted and deviated by the deviation rectifying mechanism, and then is opened by the double-station bag opening and supporting mechanism, is longitudinally conveyed to the bag supporting station, and is horizontally moved to the longitudinal pushing station of the bag pushing mechanism; meanwhile, the material bag is conveyed to the material bag screening mechanism along the material bag conveying line, and the unqualified material bag is screened out, and the qualified material bag is conveyed to the material centering mechanism station for centering detection, and waits for pushing; when the material bag and the packaging bag are in place, the bag supporting assembly of the other station of the double-station bag opening and supporting mechanism is horizontally moved to the deviation rectifying mechanism to open and longitudinally move the bag, when the material bag is pushed into the packaging bag by the bag pushing mechanism and is conveyed to the heat sealing and bagging mechanism, the double-station bag opening and supporting mechanism is horizontally moved to switch, the material bag on the other side is put into the bag, and the bag supporting assembly of the bag pushing is horizontally moved to the abutting position of the deviation rectifying mechanism again, and after the heat sealing is completed, the material bag is conveyed and discharged by the discharging reversing mechanism.

[0143] The present application is not limited to the above-mentioned best mode, and anyone can derive other various forms of vacuum packaging secondary bagging machine and its working method under the inspiration of the present application. Any equivalent changes and modifications made within the scope of the patent application of the present application shall be covered by the present application.

Claims

1. A vacuum-packaged secondary bagger characterized by: The packaging bag conveying line comprises a bag conveying mechanism, and a bag rectifying mechanism is connected to the conveying end of the bag conveying belt; the bag rectifying mechanism is connected to a double-station bag opening and supporting mechanism, and the mechanism is connected to two groups of bag pushing mechanisms arranged symmetrically in the transverse direction; the material bag conveying line comprises a material bag screening mechanism, which is connected to the bag pushing mechanism and the double-station bag opening and supporting mechanism through a lifting platform, and is sequentially provided with a heat sealing and bag arranging mechanism and a material discharging reversing mechanism along the bag pushing direction.

2. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The rectifying mechanism comprises a rectifying assembly arranged above the conveying end of the bag conveying belt, the rectifying assembly comprises a rectifying plate extending in the transverse direction, two rectifying cylinder mounting plates symmetrically arranged on the rectifying plate and slidably connected to the rectifying plate, two rectifying cylinder mounting plates connected to two groups of screw nuts of a screw rod with positive and negative teeth to be driven to slide towards or away from each other, a rectifying cylinder arranged at the lower end of each rectifying cylinder mounting plate, the piston ends of the two rectifying cylinders arranged towards each other and fixed with a brush fixing plate in the form of an inverted Z at the end, and a rectifying brush fixed at the bottom end of the brush fixing plate in the longitudinal direction of the brush fixing plate.

3. A vacuum-packed secondary bagging machine according to claim 2, characterized in that: The screw rod extends in the transverse direction and is divided into two segments with opposite rotation directions to connect the two rectifying cylinder mounting plates, the screw rod is mounted on the rectifying plate through a bearing seat, and one end of the screw rod is driven to rotate by a rectifying motor; the conveying belt support is arranged on both sides of the bag conveying belt to support the conveying belt, a support vertical plate is fixed on the transverse sides of the rectifying plate and connected to the conveying belt support, and the rectifying motor is fixed on the support vertical plate; the limiting assembly comprises a limiting frame, a limiting cylinder is fixed below the top end of the limiting frame, a limiting connecting plate is fixed to the top piston end of the limiting cylinder, a plurality of limiting plates are fixed to the limiting frame in the longitudinal direction of the limiting connecting plate and spaced apart in the transverse length direction of the limiting connecting plate, and the limiting plates extend upward to abut against the end of the packaging bag; a guide sliding plate is fixed to the top surface of the limiting frame, and an inclined plate extending downward and inclined towards the bag conveying belt on the side close to the bag conveying belt is arranged on the guide sliding plate to guide the limiting frame and the bag conveying frame, and the inclined plate is arranged in the transverse width direction of the bag conveying belt; a gap is formed on the side of the limiting frame away from the bag conveying belt and the limiting connecting plate to allow the upper and lower layers of the packaging bag to be sucked and stretched by the subsequent bag opening station, at least one group of gaps are arranged and are arranged in a staggered manner with the limiting plates, and a bag supporting rod extending horizontally towards the double-station bag opening and supporting mechanism is fixed to the limiting frame.

4. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The double-station bag opening and supporting mechanism comprises a bag opening assembly and a bag supporting mechanism which is horizontally slidable and is connected to the conveying end of the bag opening assembly in double stations, the bag opening assembly comprises a bag opening fixing frame and a bag opening support which is longitudinally slidable on the bag opening fixing frame, vertically opposite upper and lower bag opening cylinders are arranged in the bag opening support, bag opening suction cups are arranged at the telescopic ends of the upper and lower bag opening cylinders, a bag opening moving cylinder is fixed on the bag opening fixing frame and is connected to the bag opening support to drive longitudinal sliding, the bag supporting mechanism comprises two sets of bag supporting assemblies, each of which comprises two parallel bag supporting plates which are arranged to top the lateral sides of the opening of the packaging bag, the bag supporting plates are rotationally connected to the bag supporting bottom plate through the bag supporting cranks which are fixed to the lateral ends of the bag supporting plates and are hingedly connected to the piston ends of the bag supporting cylinders to drive the bag supporting plates to swing through the bag supporting cylinders, bag clamping cylinders are arranged on the bag supporting bottom plate at the lateral ends of the bag supporting plates to top the packaging bag on the bag supporting plates, the bag supporting bottom plate is slidably connected to a horizontally extending switching sliding rail at the lower end, a switching cylinder is arranged at the lower end of the bag supporting bottom plate to drive the horizontal sliding of the bag supporting bottom plate to switch stations, bag detection switches are arranged below the bag supporting and transferring stations on the bag supporting bottom plate, two sets of notches are arranged on the bag supporting bottom plate to be detected by the bag detection switches, and a vacuum generator is arranged on the bag opening support to drive the suction and release of the bag opening suction cups.

5. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The bag pushing mechanism comprises a bag pushing assembly which pushes the material package on the lifting platform into the packaging bag which is opened by the double-station bag opening and supporting mechanism, the bag pushing assembly comprises a longitudinally extending longitudinal frame, a longitudinally extending bag pushing sliding rail is fixed on the longitudinal frame and is driven by a driving member to slide the longitudinal pushing plate on the bag pushing sliding rail, an L-shaped bag pushing plate is vertically slidably connected to the longitudinal pushing plate, a reset cylinder is arranged on the longitudinal pushing plate to drive the vertical sliding of the bag pushing plate, a bag pushing channel supporting plate is arranged below the pushing end of the bag pushing assembly to support the pushing of the material package and the packaging bag to the station of the heat sealing and bagging mechanism, a square assisting opening is arranged on the surface of the bag pushing channel supporting plate at the pushing end of the bag pushing assembly, an assisting plate is arranged in the square assisting opening, and the end of the assisting plate is longitudinally slidably driven by an assisting cylinder to drag the material package and the packaging bag to the next station, the bag supporting assembly comprises bag supporting plates which are inserted into the packaging bag and are supported on the lateral sides of the bag opening, the top and the side of the side of the bag supporting plate close to the bag lifting assembly are fixedly connected with bag pushing guide plates for easy guiding, and the bag pushing guide plates are outwardly expanded in an open manner.

6. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The material bag screening mechanism comprises a feeding conveying belt, the discharge end of which is provided with a lifting platform and a straight-through conveying belt for connecting the discharge, the straight-through conveying belt is provided with a driving assembly for controlling the up-down swing thereof; the feeding conveying belt is provided with a soft bag detection assembly, which comprises a material clamp plate, the material clamp plate is provided with a telescopic jacking column for jacking the material bag; the lifting platform is arranged above the straight-through conveying belt and is driven to lift by a first cylinder, so as to connect or separate the feeding side of the lifting platform and the discharge end of the feeding conveying belt; the first cylinder is arranged at both ends of the lifting platform, the double piston rods of the first cylinder are upwardly fixedly connected with the lifting platform, and the cylinder body of the first cylinder is mounted on the external frame; the straight-through conveying belt is mounted on a conveying belt frame body, the end side of the conveying belt frame body away from the feeding conveying belt is hinged to the external frame, and the end side of the conveying belt frame body close to the feeding conveying belt is driven to swing by a second cylinder as the driving assembly, so as to connect or separate the feeding side of the straight-through conveying belt and the discharge end of the feeding conveying belt; the piston rod of the second cylinder is hinged to the conveying belt frame body, and the cylinder body of the second cylinder is hinged to the external frame; the feeding conveying belt is horizontally driven; the soft bag detection assembly comprises a fixed frame body above the feeding conveying belt, the fixed frame body is fixedly connected with an open clamp cylinder, the material clamp plate has two plates and is respectively fixedly connected with the two end piston rods of the open clamp cylinder; the material clamp plate has two plates and is arranged above the feeding conveying belt, and the two material clamp plates are oppositely arranged; the telescopic jacking column is arranged on one of the material clamp plates, the material clamp plate is provided with a jacking column accommodating through hole, and a detection telescopic cylinder is fixedly connected with the non-clamping surface side of the material, and the telescopic jacking column is fixedly connected with the piston rod of the detection telescopic cylinder.

7. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The lifting platform is provided with a material centering mechanism with detection, and the lifting platform is provided with a driving clamping plate and a driven clamping plate on two opposite sides in the material conveying direction respectively, the driving clamping plate and the driven clamping plate are driven to move close to or away from each other by a driving assembly, the driven clamping plate is further connected with a resistance ruler, and the translation direction of the driving clamping plate and the driven clamping plate is perpendicular to the material conveying direction; the bottom of the lifting platform is provided with a mounting plate of the driving assembly, the mounting plate is provided with a mounting and accommodating opening of the driving clamping plate and the driven clamping plate, the driving assembly comprises a transmission belt mounted on the bottom surface of the mounting plate, the transmission direction of the transmission belt is the translation direction of the driving clamping plate and the driven clamping plate, one side of the transmission belt is fixedly connected with a first adapter plate, the first adapter plate is fixedly connected with the bottom of the driven clamping plate after passing through the mounting and accommodating opening, the other side of the transmission belt is fixedly connected with a second adapter plate, the second adapter plate is fixedly connected with the bottom of the driving clamping plate after passing through the mounting and accommodating opening, the driving clamping plate and the mounting plate are connected with a sliding block and sliding rail moving pair, the guiding direction of the sliding block and sliding rail moving pair is the translation direction of the driving clamping plate and the driven clamping plate, the driving assembly further comprises a cylinder, the cylinder body is fixedly connected with the bottom of the mounting plate, the piston rod of the cylinder is fixedly connected with the bottom of the driving clamping plate, the cylinder body of the resistance ruler is fixedly connected with the bottom of the mounting plate, and the telescopic rod of the resistance ruler is fixedly connected with the bottom of the driven clamping plate, and the driving clamping plate and the driven clamping plate are symmetrically arranged along the center line position in the material conveying direction.

8. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The heat sealing bag arranging mechanism comprises two groups of follower plates driven to move towards or away from each other in the transverse direction by a motor assembly, the lower end of each follower plate is fixedly connected with a bag arranging claw, the bag arranging claw comprises a transverse position adjusting plate connected with the follower plate, the lower end of the transverse position adjusting plate is connected with a vertical position adjusting plate, the side edge of the vertical position adjusting plate is connected with a longitudinal position adjusting plate, the longitudinal position adjusting plate is in the shape of inverted L, the end of the longitudinal position adjusting plate is circular arc chamfered to abut on the flaps on both sides of the middle seam of the packaging bag, a centering assembly is arranged at the heat sealing output end in the longitudinal conveying direction of the packaging bag, the longitudinal end of the longitudinal position adjusting plate, the transverse end of the transverse position adjusting plate and the vertically extending vertical position adjusting plate are all provided with strip-shaped holes in the extending direction thereof for adjustment and are all connected and fixed by bolts, the motor assembly comprises a bag arranging motor, a driving pulley, a driven pulley, a synchronous belt and a fixed frame, the back side of the fixed frame is fixedly connected with a heat sealing assembly, the heat sealing assembly comprises a main plate connected with the fixed frame, the upper heat sealing plate and the lower heat sealing plate are driven to move towards or away from each other in the vertical direction by a linkage assembly on the main plate, the linkage assembly comprises linkage handles arranged symmetrically in the transverse direction on the main plate, the center of each linkage handle is rotationally connected with the main plate, the inner and outer sides of each linkage handle are respectively hingedly connected with an upper linkage rod and a lower linkage rod, the lower end of each upper linkage rod is connected with the upper heat sealing plate, each lower linkage rod is connected with the lower heat sealing plate, a linkage cylinder is fixedly arranged on the main plate between the two linkage handles, the bottom of the piston end of the linkage cylinder is connected with the upper heat sealing plate, the centering assembly comprises an outfeed conveyor belt, the top plate supported by vertical support rods on the racks on both sides of the outfeed conveyor belt, an opening clamping cylinder fixedly connected with the lower end of the top plate, clamping plates driven to move towards or away from each other by the opening clamping cylinder, and centering square tubes fixedly connected with the bottom end of each clamping plate.

9. A vacuum-packed secondary bagging machine according to claim 1, characterized in that: The discharge reversing mechanism comprises a discharge output machine, a reversing mechanism is connected to the output end of the discharge output machine, the reversing mechanism comprises a turnover plate, a power mechanism for driving the turnover plate to turn over is installed on the end of the turnover plate away from the discharge output machine, and a receiving groove is slidably connected to the turnover plate corresponding to the conveying direction of the discharge output machine; the reversing mechanism further comprises left and right symmetrically arranged rotating seats, rotating shafts matched with the rotating seats on the same side are fixedly connected to the left and right sides of the end of the turnover plate away from the discharge output machine, one rotating shaft extends out of the rotating seat and is movably connected to the power mechanism on the extending end; the power mechanism comprises a cylinder support, a turnover cylinder is hingedly connected to the cylinder support, a turnover swing arm is installed on the end of the rotating shaft extending out of the rotating seat, one end of the turnover swing arm is fixed to the end of the rotating shaft extending out of the rotating seat and rotates synchronously with the end of the rotating shaft extending out of the rotating seat, and the other end of the turnover swing arm is hingedly connected to the telescopic end of the turnover cylinder; the slot of the receiving groove faces the end of the turnover plate connected to the discharge output machine, a rodless cylinder for driving the receiving groove to slide is installed on the middle part of the lower plate surface of the turnover plate, a sliding support is slidably connected to the lower plate surface of the turnover plate, the sliding support is fixedly connected to the sliding block on the rodless cylinder, and the sliding support is fixedly connected to the receiving groove; the sliding support comprises a connecting plate, the connecting plate is parallel to the turnover plate, left and right ends of the connecting plate are provided with connecting wing plates, the connecting wing plates are perpendicular to the connecting plate, and sliding guide holes for the connecting wing plates to pass through and slide are arranged on the left and right sides of the receiving groove on the turnover plate; the middle part of the connecting plate is fixedly connected to the sliding block on the rodless cylinder, and the end of the connecting wing plate passes through the sliding guide hole and is connected to the same end of the receiving groove; the receiving groove comprises a supporting plate, fixed baffle plates are arranged on the left and right ends of the supporting plate, one side between the two fixed baffle plates is connected through a connecting baffle plate, the side of the supporting plate away from the connecting baffle plate is slidably connected to the upper plate surface of the turnover plate, and the two fixed baffle plates, the connecting baffle plate, the supporting plate and the turnover plate surround a receiving space; a buffer mechanism is arranged in the receiving space on the supporting plate, the buffer mechanism comprises a buffer bearing plate, a buffer cylinder is installed on the supporting plate, the movable end of the buffer cylinder is connected to the buffer bearing plate, and an auxiliary spring is arranged between the supporting plate and the buffer bearing plate on the side of the buffer cylinder; a plurality of guide holes perpendicular to the plate surface of the turnover plate are arranged on the connecting wing plate, and a plurality of screws matched with the guide holes are arranged on the connecting wing plate; a swing support is installed on the lower plate surface of the end of the turnover plate away from the discharge output machine, the swing support comprises a swing base plate, the swing base plate is parallel to the turnover plate, swing wing plates are symmetrically arranged on the left and right sides of the swing base plate, the rotating shaft is fixed to the outer side of the swing wing plate, and the distance between the connecting plate and the turnover plate is smaller than the distance between the swing base plate and the turnover plate.

10. A method of operating a vacuum-packing secondary bagger, characterized in that, The vacuum packaging secondary bagging machine as claimed in any one of claims 1-9 is used and the following steps are performed: first, the packaging bag is conveyed to the bag conveying belt along the packaging bag conveying line, then is adjusted and deviated by the deviation rectifying mechanism, then is opened by the double-station bag opening and supporting mechanism, is longitudinally conveyed to the bag supporting station, is supported by the longitudinal conveying knife, is horizontally moved and is butted to the longitudinal pushing station of the bag pushing mechanism; meanwhile, the material bag is conveyed to the material bag screening mechanism along the material bag conveying line, the unqualified material bag is screened out, the qualified material bag is conveyed to the material centering mechanism station for centering detection, and is pushed when the material bag is in place; when the material bag and the packaging bag are in place, the bag supporting assembly of the other station of the double-station bag opening and supporting mechanism is horizontally moved to the deviation rectifying mechanism to open the bag and longitudinally move, when the material bag is pushed into the packaging bag by the bag pushing mechanism and is conveyed to the heat sealing and bagging mechanism, the double-station bag opening and supporting mechanism is horizontally moved again to switch, the material bag on the other side is put into the bag, and the bag supporting assembly that has completed the bag pushing reaches the butting station of the deviation rectifying mechanism again, and after the heat sealing is completed, is conveyed and discharged by the discharging reversing mechanism.

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