CN117507480A

CN117507480A - Corner and bottom sealing device for packaging bag

Info

Publication number: CN117507480A
Application number: CN202311782589.0A
Authority: CN
Inventors: 杨昺; 孙志平
Original assignee: Changzhou Ruizhi Electromechanical Technology Co ltd
Current assignee: Changzhou Ruizhi Electromechanical Technology Co ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-02-06

Abstract

The application relates to a corner sealing and bottom sealing device of a packaging bag, which is applied to the field of packaging bag production. The automatic packaging machine comprises a feeding mechanism, a corner sealing mechanism and a bottom sealing cutting mechanism which are sequentially arranged on a machine frame, wherein the feeding mechanism is used for winding a bag body, and the end part of the bag body sequentially passes through the corner sealing mechanism and the bottom sealing cutting mechanism; the corner sealing mechanism comprises a corner sealing driving assembly and a corner sealing assembly, the corner sealing driving assembly is arranged on the frame and drives the corner sealing assembly to extrude the bag body and heat-seal the side edges of the bag body, and the bottom sealing cutting mechanism seals the bag body and cuts off the bag body to form independent packaging bags. The utility model has the advantages of can ensure that the material can not remain in triangle-shaped region when the user emptys the material, can promote production speed again, improved the production efficiency's of wrapping bag effect.

Description

Corner and bottom sealing device for packaging bag

Technical Field

The application relates to the field of packaging bag production, in particular to a corner and bottom sealing device of a packaging bag.

Background

The existing packaging bag (industrial powder packaging bag or grain packaging bag) is generally directly sealed at the bottom when being manufactured in a production line, a triangular area is formed at the corners, and the triangular area is filled with materials during subsequent material filling. And the material in the triangular area is easy to remain in the triangular area when the user pours the material.

In order to overcome the defects, after the bottom of the packaging bag is sealed and cut off, an independent ironing and sealing mechanism is used for ironing and sealing the corners of the packaging bag, the ironing and sealing mechanism generally comprises a supporting plate and an ironing and sealing plate, the supporting plate is supported on the side wall of the packaging bag and supports out a triangular area, then the ironing and sealing plate is used for ironing and sealing, the triangular area is sealed, and materials can not enter the triangular area during subsequent material filling, so that the defect that residual materials exist during pouring is overcome.

The production mode reduces material residues in the subsequent use, but increases the middle collecting and transferring link in the production of the packaging bag, slows down the production progress of the whole packaging bag and influences the production efficiency of the packaging bag.

Disclosure of Invention

In order to improve the problem that wrapping bag production efficiency is low, this application provides a corner sealing back cover device of wrapping bag.

The application provides a corner sealing back cover device of wrapping bag adopts following technical scheme:

the corner sealing and bottom sealing device of the packaging bag comprises a feeding mechanism, a corner sealing mechanism and a bottom sealing and cutting mechanism which are sequentially arranged on a frame, wherein the feeding mechanism is used for winding a bag body, and the end part of the bag body sequentially passes through the corner sealing mechanism and the bottom sealing and cutting mechanism;

the corner sealing mechanism comprises a corner sealing driving assembly and a corner sealing assembly, the corner sealing driving assembly is arranged on the frame and drives the corner sealing assembly to extrude the bag body and heat-seal the side edges of the bag body, and the bottom sealing cutting mechanism seals the bag body and cuts off the bag body to form independent packaging bags.

Through adopting above-mentioned technical scheme, carry out the back cover and cut off the independent wrapping bag of formation after carrying out the angle again in the bag body production process first, put the angle process and cut off before the back cover, the wrapping bag that is can continuous production, can ensure that the material can not remain in triangle-shaped region when the user emptys the material, can promote production speed again, improved the production efficiency of wrapping bag.

Optionally, the corner sealing driving assembly comprises a track part and a driving part, the track part is fixed on the frame, the corner sealing assembly is arranged on the track part and moves on the track part, and the driving part is fixed on the frame and is used for driving the corner sealing assembly to move on the track part;

the track part comprises a pair of sliding rails fixed on the rack, each sliding rail is provided with two sliding seats, each sliding seat slides on the corresponding sliding rail, each sliding seat is provided with an angle sealing assembly, and the driving part drives the sliding seats on the same sliding rail to be close to or far away from each other;

and a supporting plate is arranged between two sliding seats on the same sliding rail, the supporting plate is fixed on the frame, the two sliding seats on the same sliding rail are simultaneously close to or far away from the supporting plate, and the bag body passes through the two supporting plates and is propped against the outer wall of the bag body.

Through adopting above-mentioned technical scheme, the centre joint of the bag body inwards sunken so that the fagging can insert the centre joint and play the supporting role when the bag body passes through the fagging, and the fagging can play the supporting role when sealing the angle subassembly and sealing the angle.

Optionally, the corner sealing assembly comprises a heat sealing block, the heat sealing block is fixed on the sliding seat, a perforation for the heat sealing block to pass through is arranged on the supporting plate, and when two sliding seats on the same sliding rail are mutually close, the heat sealing block is mutually abutted in the perforation.

By adopting the technical scheme, the whole bag body can be completely clamped when the heat sealing blocks are combined so as to realize heat sealing.

Optionally, the back cover cutting mechanism includes back cover subassembly and cuts off the subassembly, the back cover subassembly with it locates to cut off the subassembly in the frame, the bag body by the angle subassembly to the back cover subassembly removes, it locates to cut off the subassembly back cover subassembly below, when the back cover subassembly centre gripping bag body cut off the subassembly and cut off the bag body forms independent wrapping bag.

Through adopting above-mentioned technical scheme, the bag body after the angle seal is through the heat-seal of back cover subassembly, cuts off the subassembly and also keeps in step centre gripping and cuts off when the back cover subassembly action to form one end open-ended independent wrapping bag. The whole process can be continuously produced, the manual intervention transferring process is reduced, the fact that materials cannot remain in the triangular area when a user dumps the materials can be guaranteed, the production speed can be improved, and the production efficiency of the packaging bag is improved.

Optionally, the back cover subassembly includes main strip of paper used for sealing, vice strip of paper used for sealing and straight line push cylinder, straight line push cylinder is fixed in the frame, main strip of paper used for sealing is fixed on the mount pad of straight line push cylinder, vice strip of paper used for sealing is fixed in the frame, straight line push cylinder promote main strip of paper used for sealing to vice strip of sealing remove and with vice strip of sealing butt, the bag body follow main strip of sealing with pass between the vice strip of sealing.

Through adopting above-mentioned technical scheme, main strip of paper used for sealing and vice strip of paper used for sealing can also play the effect of centre gripping except the heat-seal when the back cover, with cut-off subassembly cooperation keep the tensioning and the level and smooth of the bag body in the cutting off process of the bag body for the back cover of the bag body can accomplish smoothly with cutting.

Optionally, the cutting assembly includes a cutting portion and a clamping portion, the clamping portion is disposed on the frame and disposed below the bottom sealing assembly, and the cutting portion is disposed between the clamping portion and the bottom sealing assembly;

the cutting part comprises a cutter and a moving track, the moving track is fixed on the frame, a moving seat is arranged on the moving track, the moving seat slides back and forth on the moving track, the cutter is fixed on the moving seat, and the cutter is driven by the moving seat to move along the width direction of the bag body when the bag body passes through the moving seat;

the clamping part comprises a clamping frame which is rotationally connected to the frame, a pair of clamping blocks are arranged on the clamping frame clamp, the bag body passes through the clamping blocks, and the clamping frame rotates to drive the clamping blocks to be close to each other and abut against the clamping blocks to clamp the bag body.

By adopting the technical scheme, the clamping part and the back cover component jointly form a clamping effect in the back cover and cutting process. The cutting operation of the back cover and the cutting part is performed simultaneously, that is, the cutting is started when the back cover is started, and the cutting is ended when the back cover is ended. In the process of sealing the bottom, the bottom sealing component and the clamping part clamp the bag body together except for the heat sealing function, a flat bag body is provided for cutting off of the cutting part, and the clamping part clamps the independent packaging bag after cutting off, so that the packaging bag can be collected and put in storage at the moment, and can also continue to participate in the actions such as filling in the production line. The manual intervention is small, the production efficiency is high, and the expansibility is good.

Optionally, the feed mechanism includes material loading subassembly and fixed length adjustment subassembly, fixed length adjustment subassembly and material loading subassembly are all fixed in the frame, and the bag body is rolled up on the material loading subassembly, and the tip of the bag body is around establishing on the fixed length adjustment subassembly.

Through adopting above-mentioned technical scheme, the fixed yield adjusting part adjusts the bag length to the production of the wrapping bag of adaptation different specifications, accommodation is wider.

Optionally, the fixed-length adjusting assembly comprises an adjusting frame, a fixed adjusting roller and a movable adjusting roller, the adjusting frame is fixed on the frame, the fixed adjusting roller is fixed at one end of the adjusting frame, a power part is arranged on the adjusting frame, and the movable adjusting roller is arranged on the power part and is driven by the power part to approach or be far away from the fixed adjusting roller along the length direction of the adjusting frame;

the power part comprises a power motor, a screw and a sliding sleeve, the movable regulating roller is arranged on the sliding sleeve, the power motor is fixed on the regulating frame, the screw is rotationally connected on the regulating frame and driven to rotate by the power motor, and the bag body is S-shaped and is wound between the fixed regulating roller and the movable regulating roller.

Through adopting above-mentioned technical scheme, power motor rotates and makes the altitude mixture change of moving the dancer roll be close to or keep away from the corner sealing subassembly to adjust the area length, adapt to the production of the wrapping bag of different specifications, accommodation is wider.

Optionally, the feeding assembly includes a feeding part and a tensioning part, the feeding part includes a feeding frame and a feeding roller, one end of the feeding frame is fixed on a frame, the feeding roller is rotationally connected with the other end of the feeding frame, the bag body is wound on the feeding roller, one end of the tensioning part is fixed on the frame, and the other end of the tensioning part extends towards the feeding roller and is abutted against the outer wall of the bag body in a roll shape;

the tensioning portion comprises a tensioning belt and a balancing weight, one end of the tensioning belt is fixed on the frame, the other end of the tensioning belt extends towards the feeding roller, the balancing weight is fixed with the other end of the tensioning belt, and the tensioning belt abuts against the outer wall of the drum-shaped bag body.

Through adopting above-mentioned technical scheme, the balancing weight makes the tensioning area possess certain tensioning force, because the tensioning effect when the tensioning area butt is on the bag body of reel form, the phenomenon that the elasticity is different can not appear in the bag body when the reel rotates, and the pay-off is more even.

Optionally, the feeding roller comprises a roller core, a coil spring is sleeved on the roller core, one end of the coil spring is fixed on the roller core, a plurality of tensioning plates are sleeved on the outer wall of the coil spring, the plurality of tensioning plates are circumferentially wound on the outer side of the roller core, the coil spring is arranged between the roller core and the tensioning plates, adjacent tensioning plates are connected through a connecting belt, and the other end of the coil spring is fixed on any tensioning plate;

the clamping part is arranged on the outer wall of the tensioning plate and used for clamping the end part of the bag body, the clamping part comprises a limiting seat and a pressing plate, the limiting seat is fixed on the tensioning plate, one end of the pressing plate is rotationally connected to the limiting seat, a gap for the bag body to be inserted is formed between the pressing plate and the limiting seat, a plurality of pressing columns are arranged at one end, facing the limiting seat, of the pressing plate, and when the pressing plate is parallel to the limiting seat, the pressing columns are propped against the bag body;

the side wall of the pressing plate is provided with a clamping spring, the limiting seat is provided with a clamping hole for the clamping spring to be inserted into, and the clamping spring is clamped in the clamping hole when the pressing plate is parallel to the limiting seat.

Through adopting above-mentioned technical scheme, the pressure that the reel given the wind spring diminishes when the bag body on the reel diminishes, and the wind spring is released and is made the outer wall increase of reel to play certain tensioning effect, with the cooperation of tensioning area, the material loading of the bag body is more even.

In summary, the present application includes at least one of the following beneficial effects:

1. the corner sealing is firstly carried out in the bag body production process, then the bottom sealing and the cutting are carried out to form an independent packaging bag, namely, the corner sealing process is put before the bottom sealing and the cutting are carried out, so that the packaging bag can be continuously produced, the situation that materials are not remained in a triangular area when a user pours the materials can be ensured, the production speed can be improved, and the production efficiency of the packaging bag is improved;

2. the fixed-length adjusting assembly is composed of a group of movable adjusting rollers and a plurality of groups of fixed adjusting rollers, the length of a bag body reserved on the fixed-length adjusting assembly is adjusted by adjusting the distance between the fixed adjusting rollers and the movable adjusting rollers, if the packaging bags with different lengths are required to be produced, the bag body can be released or rolled by adjusting the distance between the fixed adjusting rollers and the movable adjusting rollers so as to adapt to the production of the packaging bags with different lengths, and meanwhile, the distance between the fixed adjusting rollers and the movable adjusting rollers is adjusted, so that synchronous actions of the corner sealing mechanism and the bottom sealing cutting mechanism can be ensured when the packaging bags with different lengths are produced, the pause time in the production process of the packaging bags is reduced, and the production efficiency is improved;

3. the bag body on the winding drum is reduced, the pressure of the winding drum to the coil spring is reduced, the coil spring is loosened, so that the outer wall of the winding drum is increased, a certain tensioning effect is achieved, the bag body is matched with the tensioning belt, and the feeding of the bag body is more uniform.

Drawings

Fig. 1 is a schematic structural view of a corner and bottom sealing device of a packaging bag according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a fixed length adjusting assembly according to an embodiment of the present application;

FIG. 3 is a schematic structural view of an angle sealing mechanism according to an embodiment of the present application;

fig. 4 is a schematic structural view of a back cover cutting mechanism according to an embodiment of the present application;

FIG. 5 is a schematic view of a structure of a feeding roller according to an embodiment of the present application

In the figure: 1. a feeding mechanism; 11. a feeding assembly; 111. a feeding roller; 1111. a roll core; 1112. a coil spring; 1113. a tensioning plate; 1114. a limit seat; 1115. a pressing plate; 112. tensioning the belt; 113. balancing weight; 12. a fixed length adjusting component; 121. an adjusting frame; 122. a fixed regulating roller; 123. a movable regulating roller; 124. a power motor; 125. a screw rod; 126. a sliding sleeve; 2. an angle sealing mechanism; 21. a corner sealing drive assembly; 211. a slide rail; 212. a slide; 213. a supporting plate; 22. a corner sealing assembly; 221. heat sealing blocks; 3. a bottom sealing cutting mechanism; 31. a back cover assembly; 311. a main seal; 312. a secondary seal; 313. a straight-line pushing cylinder; 32. cutting off the assembly; 321. a cutting section; 3211. a cutter; 3212. a moving track; 322. a clamping part; 3221. a clamping frame; 3222. a clamping block; 4. a frame.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1-5.

The embodiment of the application discloses a corner and bottom sealing device of a packaging bag. Referring to fig. 1, the corner sealing and bottom sealing device of the packaging bag comprises a frame 4, and a feeding mechanism 1, a corner sealing mechanism 2 and a bottom sealing and cutting mechanism 3 are sequentially installed on the frame 4. The bag body is wound on the feeding mechanism 1, the end part of the bag body extends from the feeding mechanism 1 to the corner sealing mechanism 2, and the bag body is subjected to corner sealing through the corner sealing mechanism 2 and then is subjected to bottom sealing and cutting through the bottom sealing cutting mechanism 3, so that continuous bag bodies form independent packaging bags. The power mechanism of the whole device is also arranged on the frame 4 and is arranged near the back cover cutting mechanism 3. The power mechanism consists of a pair of power wheels, the power wheels are mutually abutted, the bag body passes through the space between the power wheels, and the power wheels rotate to pull the whole bag body to move. Specifically, the power wheel is actually fixed on the frame 4 above the back cover cutting mechanism 3, does not affect the action of the back cover cutting mechanism 3, and can provide sufficient traction force.

Referring to fig. 1 and 2, the feeding mechanism 1 at least includes a feeding assembly 11, the feeding assembly 11 includes a feeding portion and a tensioning portion, the feeding portion includes a feeding frame and a feeding roller 111, one end of the feeding frame is fixed on the frame 4, the feeding roller 111 is rotatably connected to the other end of the feeding frame, the bag body is wound on the feeding roller 111, one end of the tensioning portion is fixed on the frame 4, and the other end of the tensioning portion extends toward the feeding roller 111 and is abutted to the outer wall of the bag body in a roll shape. The tensioning part comprises a tensioning belt 112 and a balancing weight 113, one end of the tensioning belt 112 is fixed on the frame 4, the other end of the tensioning belt 112 extends towards the feeding roller 111, the balancing weight 113 is fixed with the other end of the tensioning belt 112, and the tensioning belt 112 abuts against the outer wall of the drum-shaped bag body. The feeding function can also be realized by using the feeding part and the tensioning part independently, the power wheel stops when the bag body is pulled by the power wheel to move through the corner sealing mechanism 2, the corner sealing mechanism 2 firstly seals corners, and the power wheel continues to be pulled to the bottom sealing cutting mechanism 3 for bottom sealing cutting after the corners are sealed, so that independent packaging bags are formed.

Referring to fig. 1 and 2, the power wheel is stopped at least twice for each package during production, which also affects the production efficiency. Therefore, the fixed length adjusting component 12 can be additionally arranged on the frame 4 to be matched with the feeding component 11. The fixed length adjusting assembly 12 comprises an adjusting frame 121, a fixed adjusting roller 122 and a movable adjusting roller 123, the adjusting frame 121 is fixed on the frame 4, the fixed adjusting roller 122 is fixed at one end of the adjusting frame 121, a power part is arranged on the adjusting frame 121, and the movable adjusting roller 123 is arranged on the power part and driven by the power part to approach or depart from the fixed adjusting roller 122 along the length direction of the adjusting frame 121. The power part comprises a power motor 124, a lead screw 125 and a sliding sleeve 126, the movable regulating roller 123 is arranged on the sliding sleeve 126, the power motor 124 is fixed on the regulating frame 121, the lead screw 125 is rotationally connected on the regulating frame 121 and driven to rotate by the power motor 124, and the bag body is S-shaped and is wound between the fixed regulating roller 122 and the movable regulating roller 123. The fixed length adjusting assembly 12 adopts a set of movable adjusting rollers 123 and a plurality of groups of fixed adjusting rollers 122 to be combined, the length of a bag body reserved on the fixed length adjusting assembly 12 is adjusted by adjusting the distance between the fixed adjusting rollers 122 and the movable adjusting rollers 123, if the packaging bag with different lengths needs to be produced, the bag body can be released or rolled up by adjusting the distance between the fixed adjusting rollers 122 and the movable adjusting rollers 123 so as to adapt to the production of the packaging bag with different lengths, and meanwhile, the distance between the fixed adjusting rollers 122 and the movable adjusting rollers 123 is adjusted, so that the corner sealing mechanism 2 and the bottom sealing cutting mechanism 3 can synchronously act when the packaging bag with different lengths is produced, the pause time in the production process of the packaging bag is reduced, and the production efficiency is improved.

Referring to fig. 1 and 3, the bag body is pulled into the corner sealing mechanism 2 from the feeding mechanism 1 by a power wheel to seal corners. The corner sealing mechanism 2 comprises a corner sealing driving assembly 21 and a corner sealing assembly 22, wherein the corner sealing driving assembly 21 is arranged on the frame 4 and drives the corner sealing assembly 22 to squeeze the bag body and heat-seal the side edges of the bag body. The corner sealing driving assembly 21 comprises a track part and a driving part, wherein the track part is fixed on the frame 4, the corner sealing assembly 22 is arranged on the track part and moves on the track part, and the driving part is fixed on the frame 4 and used for driving the corner sealing assembly 22 to move on the track part. The corner sealing assembly 22 clamps the bag body and presses the bag body to heat-seal the triangular area in a heat-sealing mode, so that materials cannot flow into the triangular area when the packaging bag is used for taking materials, the materials cannot remain in the triangular area when the materials are poured, and waste of the materials is reduced.

Referring to fig. 1 and 3, the track portion includes a pair of slide rails 211 fixed on the frame 4, two slide carriages 212 are provided on each slide rail 211, the slide carriages 212 slide on the slide rails 211, each slide carriage 212 is provided with a corner sealing assembly 22, and the pair of slide rails 211 are oppositely arranged and extend along the thickness direction of the bag body, so that the slide carriages 212 can approach the end surface direction of the bag body when moving. The driving part may be a cylinder or a hydraulic cylinder, and drives the sliding bases 212 on the same sliding rail 211 to approach each other or to separate from each other. The driving part is fixed on the frame 4, a supporting plate 213 is arranged between two sliding seats 212 on the same sliding rail 211, the supporting plate 213 is fixed on the frame 4, the two sliding seats 212 on the same sliding rail 211 are simultaneously close to or far away from the supporting plate 213, the bag body passes through the space between the two supporting plates 213, and the supporting plate 213 is abutted against the outer wall of the bag body. The center seam of the bag body is recessed inward to form an M shape so that the gusset 213 can be inserted into the center seam and support the bag body when the bag body passes the gusset 213, and the gusset 213 can support the corner sealing assembly 22 when the corner is sealed. The corner sealing assembly 22 comprises a heat sealing block 221, the heat sealing block 221 is fixed on the sliding seat 212, a through hole for the heat sealing block 221 to pass through is arranged on the supporting plate 213, and when the two sliding seats 212 on the same sliding rail 211 are close to each other, the heat sealing blocks 221 are mutually abutted in the through holes. The support plate 213 is provided with a yielding hole, and the heat sealing block 221 can completely clamp the whole bag body to realize heat sealing when being combined.

Referring to fig. 1 and 4, after the bag body is subjected to corner sealing, the bag body is pulled by a power wheel to enter a bottom sealing and cutting mechanism 3 for bottom sealing and cutting, and a packaging bag is formed. The bottom sealing and cutting mechanism 3 comprises a bottom sealing component 31 and a cutting component 32, the bottom sealing component 31 and the cutting component 32 are arranged on the frame 4, the bag body moves from the corner sealing component 22 to the bottom sealing component 31, the cutting component 32 is arranged below the bottom sealing component 31, and the cutting component 32 cuts off the bag body to form independent packaging bags when the bottom sealing component 31 clamps the bag body. The bottom sealing assembly 31 and the cutting assembly 32 act simultaneously, the bag body after corner sealing is heat sealed through the bottom sealing assembly 31, and the cutting assembly 32 clamps and cuts synchronously when the bottom sealing assembly 31 acts so as to form an independent packaging bag with one open end. The whole process can be continuously produced, the manual intervention transferring process is reduced, the fact that materials cannot remain in the triangular area when a user dumps the materials can be guaranteed, the production speed can be improved, and the production efficiency of the packaging bag is improved.

Referring to fig. 1 and 4, the back cover assembly 31 includes a main seal 311, a sub seal 312, and a linear push cylinder 313, the linear push cylinder 313 is fixed to the frame 4, the main seal 311 is fixed to a mount of the linear push cylinder 313, the sub seal 312 is fixed to the frame 4, the linear push cylinder 313 pushes the main seal 311 to move toward the sub seal 312 and to abut against the sub seal 312, and the bag body passes between the main seal 311 and the sub seal 312. The cutting assembly 32 includes a cutting portion 321 and a clamping portion 322, the clamping portion 322 is disposed on the frame 4 and below the back cover assembly 31, and the cutting portion 321 is disposed between the clamping portion 322 and the back cover assembly 31. The cutting portion 321 includes a cutter 3211 and a moving rail 3212, the moving rail 3212 is fixed on the frame 4, a moving seat is provided on the moving rail 3212, the moving seat slides reciprocally on the moving rail 3212, the cutter 3211 is fixed on the moving seat, and the cutter 3211 is driven by the moving seat to move along the width direction of the bag body when the bag body passes through. The main seal 311 and the auxiliary seal 312 can also play a role in clamping besides heat sealing during the back sealing, and are matched with the cutting assembly 32 to keep the tensioning and flatness of the bag body in the cutting process of the bag body, so that the back sealing and cutting of the bag body can be smoothly completed.

Referring to fig. 1 and 4, the clamping portion 322 includes a clamping frame 3221 rotatably connected to the frame 4, a pair of clamping blocks 3222 are provided on the clamping frame 3221, the bag body passes between the pair of clamping blocks 3222, and the clamping frame 3221 rotates to drive the clamping blocks 3222 to approach each other and abut against the clamping blocks for clamping the bag body. The clamping portion 322 and the back cover assembly 31 together form a clamping action during the back cover and cutting process. The cutting operation of the back cover and the cutting unit 321 is performed simultaneously, that is, the cutting is started when the back cover is started, and the cutting is ended when the back cover is ended. In the process of sealing the bottom, the bottom sealing component 31 and the clamping part 322 clamp the bag body together except for the heat sealing function, a flat bag body is provided for cutting off the cutting part 321, and the clamping part 322 clamps the separated packaging bag after cutting off, so that the packaging bag can be collected and put in storage at the moment, and can also continue to participate in the filling and other actions in the production line. The manual intervention is small, the production efficiency is high, and the expansibility is good.

Referring to fig. 1 and 5, the feeding roller 111 may be a smooth roller or may include a roller core 1111, a coil spring 1112 is sleeved on the roller core 1111, one end of the coil spring 1112 is fixed on the roller core 1111, a plurality of tension plates 1113 are sleeved on the outer wall of the coil spring 1112, a plurality of tension plates 1113 are circumferentially wound on the outer side of the roller core 1111, the coil spring 1112 is arranged between the roller core and the tension plates 1113, adjacent tension plates 1113 are connected through a connecting belt, and the other end of the coil spring 1112 is fixed on any tension plate 1113. At least one group of coil springs 1112 is arranged, when a whole roll of bag body is wound on the tensioning plate 1113 in an initial state, the tensioning plate 1113 is extruded to drive the coil springs 1112 to deform so that the coil springs 1112 are stressed, the pressure of the bag body to the coil springs 1112 is reduced along with the reduction of the number of the bag bodies on the roller cores 1111, the coil springs 1112 are restored to deform, the tensioning plate 1113 is supported to be matched with the tensioning part, the balancing weight 113 enables the tensioning belt 112 to have a certain tensioning force, when the tensioning belt 112 is abutted to the roll-shaped bag body, due to the tensioning effect, the phenomenon of uneven tightness of the bag body can not occur when the roll rotates, the feeding is more uniform, meanwhile, the coil springs 1112 are loosened so that the outer wall of the roll is enlarged, a certain tensioning effect is achieved, the bag body is matched with the tensioning belt 112, and the feeding of the bag body is more uniform.

The clamping part 322 is arranged on the outer wall of the tensioning plate 1113 and is used for clamping the end part of the bag body, the clamping part 322 comprises a limiting seat 1114 and a pressing plate 1115, the limiting seat 1114 is fixed on the tensioning plate 1113, one end of the pressing plate 1115 is rotationally connected to the limiting seat 1114, a gap for the bag body to be inserted is formed between the pressing plate 1115 and the limiting seat 1114, a plurality of compression columns are arranged at one end of the pressing plate 1115, facing the limiting seat 1114, of the pressing plate 1115, and the compression columns are abutted to the bag body when the pressing plate 1115 is parallel to the limiting seat 1114. The lateral wall of the pressing plate 1115 is provided with a clamping spring, the limiting seat 1114 is provided with a clamping hole for the clamping spring to be inserted, and the clamping spring is clamped in the clamping hole when the pressing plate 1115 is parallel to the limiting seat 1114. The clamping spring can be released after the bag body is used up, so that the bag body can be completely released, and waste is reduced.

In this application, the in-process that the bag body produced into the wrapping bag carries out the angle earlier and seals the back cover and cut off and form independent wrapping bag again, will seal the angle process and put before the back cover cuts off, and the wrapping bag that is can continuous production, can ensure that the material can not remain in triangle-shaped region when the user emptys the material, can promote production speed again, has improved the production efficiency of wrapping bag.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a corner sealing back cover device of wrapping bag which characterized in that: the automatic sealing machine comprises a feeding mechanism (1), a corner sealing mechanism (2) and a bottom sealing cutting mechanism (3) which are sequentially arranged on a frame (4), wherein the feeding mechanism (1) is used for winding a bag body, and the end part of the bag body sequentially passes through the corner sealing mechanism (2) and the bottom sealing cutting mechanism (3);

the corner sealing mechanism (2) comprises a corner sealing driving assembly (21) and a corner sealing assembly (22), the corner sealing driving assembly (21) is arranged on the frame (4) to drive the corner sealing assembly (22) to squeeze the bag body and heat-seal the side edges of the bag body, and the bottom sealing cutting mechanism (3) is used for sealing the bag body and cutting off the bag body to form independent packaging bags.

2. The corner and bottom sealing device of a package according to claim 1, wherein: the corner sealing driving assembly (21) comprises a track part and a driving part, the track part is fixed on the frame (4), the corner sealing assembly (22) is arranged on the track part and moves on the track part, and the driving part is fixed on the frame (4) and is used for driving the corner sealing assembly (22) to move on the track part;

the track part comprises a pair of sliding rails (211) fixed on the frame (4), each sliding rail (211) is provided with two sliding seats (212), each sliding seat (212) slides on the corresponding sliding rail (211), each sliding seat (212) is provided with an angle sealing component (22), and the driving part drives the sliding seats (212) on the same sliding rail (211) to be close to or far from each other;

a supporting plate (213) is arranged between two sliding seats (212) on the same sliding rail (211), the supporting plate (213) is fixed on the frame (4), the two sliding seats (212) on the same sliding rail (211) are simultaneously close to or far away from the supporting plate (213), and the bag body passes through the space between the two supporting plates (213) and the supporting plate (213) is abutted against the outer wall of the bag body.

3. The corner and bottom sealing device of a package according to claim 2, wherein: the corner sealing assembly (22) comprises a heat sealing block (221), the heat sealing block (221) is fixed on a sliding seat (212), a through hole for the heat sealing block (221) to pass through is formed in the supporting plate (213), and when two sliding seats (212) on the same sliding rail (211) are close to each other, the heat sealing block (221) is in mutual abutting connection in the through hole.

4. The corner and bottom sealing device of a package according to claim 1, wherein: the back cover cutting mechanism (3) comprises a back cover assembly (31) and a cutting assembly (32), the back cover assembly (31) and the cutting assembly (32) are arranged on the frame (4), the bag body is moved from the corner sealing assembly (22) to the back cover assembly (31), the cutting assembly (32) is arranged below the back cover assembly (31), and the cutting assembly (32) cuts off the bag body to form an independent packaging bag when the back cover assembly (31) clamps the bag body.

5. The corner and bottom sealing device for a package of claim 4, wherein: the bottom sealing assembly (31) comprises a main sealing strip (311), an auxiliary sealing strip (312) and a linear pushing cylinder (313), wherein the linear pushing cylinder (313) is fixed on the frame (4), the main sealing strip (311) is fixed on a mounting seat of the linear pushing cylinder (313), the auxiliary sealing strip (312) is fixed on the frame (4), and the linear pushing cylinder (313) pushes the main sealing strip (311) to move towards the auxiliary sealing strip (312) and be abutted to the auxiliary sealing strip (312), and a bag body penetrates through the space between the main sealing strip (311) and the auxiliary sealing strip (312).

6. The corner and bottom sealing device for a package of claim 5, wherein: the cutting assembly (32) comprises a cutting part (321) and a clamping part (322), the clamping part (322) is arranged on the frame (4) and is arranged below the bottom sealing assembly (31), and the cutting part (321) is arranged between the clamping part (322) and the bottom sealing assembly (31);

the cutting part (321) comprises a cutter (3211) and a moving rail (3212), the moving rail (3212) is fixed on the frame (4), a moving seat is arranged on the moving rail (3212), the moving seat slides back and forth on the moving rail (3212), the cutter (3211) is fixed on the moving seat, and the cutter (3211) is driven by the moving seat to move along the width direction of the bag body when the bag body passes through;

clamping part (322) are including rotating clamping frame (3221) of connecting in frame (4), clamping frame (3221) presss from both sides and is equipped with a pair of grip block (3222), and the bag body passes between a pair of grip block (3222), and clamping frame (3221) rotate and drive grip block (3222) are close to each other and the butt is used for the centre gripping bag body.

7. The corner and bottom sealing device of a package according to claim 1, wherein: the feeding mechanism (1) comprises a feeding assembly (11) and a fixed-length adjusting assembly (12), the fixed-length adjusting assembly (12) and the feeding assembly (11) are both fixed on the frame (4), the bag body is wound on the feeding assembly (11), and the end part of the bag body is wound on the fixed-length adjusting assembly (12).

8. The corner and bottom sealing device for a package of claim 7, wherein: the fixed length adjusting assembly (12) comprises an adjusting frame (121), a fixed adjusting roller (122) and a movable adjusting roller (123), the adjusting frame (121) is fixed on a frame (4), the fixed adjusting roller (122) is fixed at one end of the adjusting frame (121), a power part is arranged on the adjusting frame (121), and the movable adjusting roller (123) is arranged on the power part and driven by the power part to approach or depart from the fixed adjusting roller (122) along the length direction of the adjusting frame (121);

the power portion comprises a power motor (124), a lead screw (125) and a sliding sleeve (126), the movable regulating roller (123) is arranged on the sliding sleeve (126), the power motor (124) is fixed on a regulating frame (121), the lead screw (125) is rotationally connected on the regulating frame (121) and is driven to rotate by the power motor (124), and the bag body is wound in an S shape and arranged between the fixed regulating roller (122) and the movable regulating roller (123).

9. The corner and bottom sealing device for a package of claim 7, wherein: the feeding assembly (11) comprises a feeding part and a tensioning part, the feeding part comprises a feeding frame and a feeding roller (111), one end of the feeding frame is fixed on a frame (4), the feeding roller (111) is rotationally connected with the other end of the feeding frame, a bag body is wound on the feeding roller (111), one end of the tensioning part is fixed on the frame (4), and the other end of the tensioning part extends towards the feeding roller (111) and is abutted to the outer wall of the bag body in a roll shape;

the tensioning part comprises a tensioning belt (112) and a balancing weight (113), one end of the tensioning belt (112) is fixed on the frame (4), the other end of the tensioning belt (112) extends towards the feeding roller (111), the balancing weight (113) is fixed with the other end of the tensioning belt (112), and the tensioning belt (112) abuts against the outer wall of the drum-shaped bag body.

10. The corner and bottom sealing device for a package of claim 9, wherein: the feeding roller (111) comprises a roller core (1111), a coil spring (1112) is sleeved on the roller core (1111), one end of the coil spring (1112) is fixed on the roller core (1111), a plurality of tensioning plates (1113) are sleeved on the outer wall of the coil spring (1112), the tensioning plates (1113) are circumferentially wound on the outer side of the roller core (1111), the coil spring (1112) is arranged between the roller core and the tensioning plates (1113), adjacent tensioning plates (1113) are connected through connecting belts, and the other end of the coil spring (1112) is fixed on any tensioning plate (1113);

the clamping part (322) is arranged on the outer wall of the tensioning plate (1113) and used for clamping the end part of the bag body, the clamping part (322) comprises a limiting seat (1114) and a pressing plate (1115), the limiting seat (1114) is fixed on the tensioning plate (1113), one end of the pressing plate (1115) is rotationally connected to the limiting seat (1114), a gap for inserting the bag body is formed between the pressing plate (1115) and the limiting seat (1114), a plurality of pressing columns are arranged at one end of the pressing plate (1115) facing the limiting seat (1114), and the pressing columns are propped against the bag body when the pressing plate (1115) is parallel to the limiting seat (1114);

the side wall of the pressing plate (1115) is provided with a clamping spring, the limiting seat (1114) is provided with a clamping hole for the clamping spring to be inserted into, and the clamping spring is clamped in the clamping hole when the pressing plate (1115) is parallel to the limiting seat (1114).