CN112571863A

CN112571863A - Flexible packaging plastic bag forming process and special trimming device

Info

Publication number: CN112571863A
Application number: CN202011157886.2A
Authority: CN
Inventors: 姚蓓蓓; 许兴一; 李庆庆
Original assignee: Zhengzhou Yanfeng Plastic Packaging Co Ltd
Current assignee: Zhengzhou Yanfeng Plastic Packaging Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-03-30
Anticipated expiration: 2040-10-26
Also published as: CN112571863B

Abstract

The application relates to the technical field of plastic bag flexible package processing and forming, and particularly discloses a flexible package plastic bag forming process and a special trimming device, wherein the flexible package plastic bag forming process comprises the steps of selecting a base material, printing and coiling to obtain a coiled primary finished product; respectively carrying out edge cutting treatment on two ends of the coiled primary finished product; then the base material is unfolded, folded and folded to form a front body base material, two back body base materials and two butt-joint folding edge base materials; carrying out heat seal treatment on the two butted and folded base materials; then, the base material is folded inwards to form a side surface body base material; then the base material is heat-sealed and cut at intervals and uniformly to form a flexible packaging plastic bag with one end being in butt joint with the sealing opening and the other end being in butt joint with the opening. The flexible packaging plastic bag forming process reduces the condition that two butt joint edge folding base materials are staggered or cannot be aligned, and meanwhile, the special edge cutting device not only realizes edge cutting of coiled primary finished products, but also has the advantages of being neat in edge cutting and simple and convenient to process.

Description

Flexible packaging plastic bag forming process and special trimming device

Technical Field

The application relates to the technical field of plastic bag flexible package processing and forming, in particular to a flexible package plastic bag forming process and a special trimming device.

Background

The soft packaging plastic bag has good water resistance, moisture resistance and air resistance, can meet the packaging requirements of various foods, and is widely applied to daily life, such as packaging of medlar, melon seeds, raisins, biscuits and the like. The soft packaging plastic bag is a packaging bag body with one end in butt joint and the other end in butt joint, when the soft packaging plastic bag is used, food is put into the packaging bag body from the butt joint opening, and then the heat sealing treatment is carried out on the butt joint opening of the packaging bag body, so that the sealing is realized.

In the flexible packaging plastic bag forming process, at first, the base material needs to be printed, patterns are formed, then the base material is folded along the two ends of the width direction of the base material, a front body base material and two rear body base materials are formed, then the two rear body base materials are respectively folded, two butt joint folding edge base materials are formed, then the two butt joint folding edge base materials are subjected to heat sealing treatment, then heat sealing treatment is carried out at intervals along the length direction of the base material, a plurality of bag body base materials with two ends sealed are formed, then the bag body base materials are cut on one side of the butt joint seal, and the flexible packaging plastic bag with one end in butt joint seal and one end in. However, the applicant has found that in the actual forming of flexible packaging plastic bags, it is often the case that the two butt flaps are not aligned.

Disclosure of Invention

In order to reduce the dislocation of two butt joint hems of a flexible package plastic bag, the application provides a flexible package plastic bag forming process and a special trimming device.

In a first aspect, the application provides a flexible packaging plastic bag forming process, which adopts the following technical scheme:

a flexible packaging plastic bag forming process is characterized in that the flexible packaging plastic bag is a packaging bag body with one end in butt joint sealing and the other end in butt joint opening, and the forming process comprises the following steps:

s1, selecting a base material;

s2, performing coiling treatment on the substrate to obtain a coiled substrate;

s3, unwinding the coiled substrate, printing the side surface of the substrate at the middle part of the width direction of the substrate, and forming a pattern on the substrate;

s4, performing coiling treatment on the base material processed in the step S3 to obtain a coiled primary finished product;

s5, respectively trimming the two ends of the coiled primary product along the axial direction of the coiled primary product;

s6, unfolding the base material processed in the step S5, folding the base material in half along two ends of the base material in the width direction to form a front body base material and two back body base materials, then folding the back body base materials to form two butt-joint folded edge base materials, and enabling the two butt-joint folded edge base materials to be in contact with each other;

s7, performing heat sealing treatment on the two butt-jointed and flanged base materials of the base materials processed in the step S6, wherein the butt-jointed and flanged base materials form a closed seal, and the rest base materials form a ring;

s8, folding the two ends of the base material processed in the step S7 along the width direction respectively, and forming a lateral surface body base material by the folded part;

s9, performing heat sealing treatment on the base materials processed in the step S8 at intervals and uniformly along the length direction of the base materials, forming butt joint sealing at the heat sealing position, and forming a plurality of bag body base materials with two sealed ends;

s10, cutting the substrate processed in the step S9 at one side of the butt seal to form a soft packaging plastic bag with one end of the butt seal and one end of the opening;

s11, arranging and packaging the flexible packaging plastic bags.

By adopting the technical scheme, the base material with the printed patterns is subjected to coiling treatment, a coiled primary finished product is obtained, then the coiled primary finished product is subjected to edge cutting treatment along the two ends of the coiled primary finished product in the axis direction, so that the distance between the base material in the width direction is equal, the alignment of the follow-up base material in the two ends of the width direction is facilitated, the condition that the two butt-joint folded edge base materials are staggered or cannot be aligned is further reduced, and meanwhile, the base material is wound into a coil, and the adjacent base materials are mutually abutted, so that the stability of the edge cutting of the base material. In this application, still roll over in the substrate, form the flank body substrate, can increase flexible packaging plastic bag's capacity, improve flexible packaging plastic bag's practicality.

Optionally, flexible packaging plastic bag includes the front face body, two sets firmly respectively at the front face body along side face body, two back face bodies at its width direction both ends, the transversal V-arrangement of personally submitting of side face body, two back face body and two side face body one-to-one, the one end that the side face body kept away from the front face body and the one end fixed connection of back body along its width direction, two the one end bending type that the side face body was kept away from to the back face body forms the butt joint hem, two butt joint hem fixed connection is in the same place, the front face body is along its length direction one end, two side face bodies along its length direction one end, two back face bodies along its length direction one end fixed connection together and form the butt joint and seal, and the other end forms the butt joint opening, be provided with the pattern on front face body.

By adopting the technical scheme, the side surface body is arranged between the front surface body and the rear surface body, so that the capacity of the flexible packaging plastic bag is increased, when the flexible packaging plastic bag is not used, the cross section of the side surface body is V-shaped, the storage space of the flexible packaging plastic bag is reduced, and the practicability of the flexible packaging plastic is improved.

Optionally, in step S9, after the heat sealing treatment is performed and the bag base material is formed, the bag base material is opened at the butt-joint sealing position to form a hand opening.

By adopting the technical scheme, when the flexible packaging plastic bag is used, the flexible packaging plastic bag is convenient to take.

Optionally, a waste material block is left at the portable opening, and the edge of the waste material block is fixedly connected with the bag body base material at the opening.

Through adopting above-mentioned technical scheme, portable opening is great, and at this moment, it does not say that the waste material piece is built, because the waste material piece does not have the influence to the processing of bag body substrate, and the waste material piece is connected on bag body substrate moreover, avoids the waste material piece to drop from bag body substrate, consequently in this forming process, does not need to carry out recovery processing to the waste material piece, the processing of the flexible packaging plastic bag of being convenient for.

Optionally, in step S9, after the heat sealing treatment is performed and the bag base material is formed, holes are punched in the bag base material at the positions to be cut, and an easy-to-tear opening is formed.

By adopting the technical scheme, the flexible packaging plastic bag is convenient to tear when in use.

Optionally, in step S3, a black detection positioning block for positioning is printed on the position to be cut of the substrate.

Through adopting above-mentioned technical scheme, black detection locating piece is located between two adjacent flexible packaging plastic bags to be used for fixing a position adjacent flexible packaging plastic bag, also be convenient for follow-up cutting the bag body substrate, the processing of the flexible packaging plastic bag of being convenient for.

Optionally, in step S3, black detection positioning bars for positioning are printed on both ends of the substrate in the width direction and on both sides of the pattern;

in step S8, after the substrate is folded inward to form the side surface body substrate, the closed seal is trimmed, and the black detection positioning strip is cut off.

Through adopting above-mentioned technical scheme, the black detects the width of location strip to the substrate and detects, and when butt joint hem substrate was inconsistent, two black detection location strips coincided, and were located the intermediate position of preceding body substrate, also were located the centre of two body substrates behind to be convenient for fix a position the substrate, improve the stability of flexible packaging plastic bag production.

In a second aspect, the present application provides a special trimming device, which adopts the following technical scheme:

a trimming device is used for trimming coiled primary products, the coiled primary products are sleeved on a roller and comprises a base, two supporting vertical plates fixedly arranged on the base, two rotating shafts respectively rotatably connected to the supporting vertical plates, a driving mechanism used for enabling the rotating shafts to rotate, a cutting mechanism arranged between the two supporting vertical plates and used for trimming the coiled primary products, and a clamping mechanism arranged between the two supporting vertical plates and used for clamping the coiled primary products, wherein mounting mechanisms used for mounting the coiled primary products are respectively arranged on the two rotating shafts;

the cutting mechanism comprises a first mounting seat, a first moving assembly for driving the first mounting seat to move along the axis direction of the rotating shaft, a driving air cylinder fixedly arranged on the first mounting seat, a cutter holder arranged at one end of a piston rod of the driving air cylinder, a mounting sleeve fixedly arranged at one end of the cutter holder and two mounting bolts symmetrically arranged on the outer peripheral surface of the mounting sleeve, screw rods of the mounting bolts penetrate through the side wall of the mounting sleeve and extend into the piston rod of the driving air cylinder and are respectively in threaded connection with the side wall of the mounting sleeve, and cutting knives are fixedly arranged on the cutter holder;

the cutting knife comprises a cutting body part with an isosceles trapezoid-shaped cross section and a pointed head part fixedly arranged at one end of the cutting body part along the length direction of the cutting body part, the cross section of the pointed head part is also isosceles trapezoid, the distance between the two ends of the pointed head part along the width direction of the cutting body part is gradually reduced to zero along the direction far away from the cutting body part, and the connecting part of the pointed head part and the cutting body part is in smooth transition;

the clamping mechanism comprises a second mounting seat, a second moving assembly for driving the second mounting seat to move along the axis direction of the rotating shaft, two clamping vertical plates connected to the second mounting seat in a sliding mode, and two clamping assemblies arranged at the bottom ends of the two clamping vertical plates respectively, wherein a third moving assembly for enabling the two clamping vertical plates to approach or depart from each other is arranged on the second mounting seat;

installation mechanism establishes at the axis of rotation outer peripheral face and rather than the installation sleeve of sliding connection, with the axis coincidence of axis of rotation the pivot, sets firmly the installation riser between installation sleeve and connection pivot, connect the pivot cover establish in the cylinder and rather than slide and be connected, the outer peripheral face of axis of rotation has set firmly the mounting panel, be provided with the adjusting part who adjusts distance between the two between mounting panel and the installation riser.

Through adopting above-mentioned technical scheme, the cylinder on the former finished product of lapping passes through installation mechanism and installs in the axis of rotation, then remove the second mount pad, and make centre gripping subassembly press from both sides tight to the former finished product of lapping, and centre gripping subassembly presss from both sides tight in the former finished product of lapping and treats one side of side cut department, later remove first mount pad, then start and drive actuating cylinder, it drives the cutting knife and removes to the former finished product orientation of lapping to drive actuating cylinder, and stretch into the former finished product of lapping inside and cut it, then drive the axis of rotation through actuating mechanism and rotate, the axis of rotation drives the former finished product of lapping through installation mechanism and rotates, the cutting knife cuts the. Because the centre gripping subassembly presss from both sides tightly in the one side of the former finished product of lapping of treating the side cut department, reduces the fold of substrate appearance, improves the stability that the cutting knife was cut edge to the former finished product of lapping, because the cutting knife is including cutting this somatic part and point head portion, and the cross section of cutting this somatic part, point head portion is isosceles trapezoid, and the point head portion is convenient for the cutting knife and is stretched into the former finished product of lapping, through cutting this somatic part, mutually supporting between the point head portion, not only makes the former finished product of lapping cut edge neat, but also has improved the. After the completion is to the side cut of lapping just finished product along its axis direction one end, remove the other end respectively with centre gripping subassembly, cutting knife to through two construction bolts, make the cutting knife rotatory 180 degrees, accomplish the side cut of lapping just finished product, through mutually supporting of two construction bolts, installation cover, be convenient for rotate the cutting knife to the edge cutting, and accomplish and cut edge, improve special side cut device and use stability and suitability.

Optionally, the outer circumferential surface of the roller is clamped with a plurality of rubber annular protection pads along the length direction of the roller, and a plurality of clamping grooves are formed in the outer side wall of the roller.

Through adopting above-mentioned technical scheme, when the cutting knife was cut edge to lapping primary product, the cutting knife can stretch into rubber ring protection pad in to increase the stability that lapping primary product was cut edge, reduce the lapping primary product and cut edge the incomplete condition, adopt rubber ring protection pad moreover, under the condition that does not influence cylinder normal use, still be convenient for change it, increase rubber ring protection pad's practicality.

Optionally, first removal subassembly is including rotating the first drive screw who connects between two support risers, set firmly between two support risers and with the first limiting plate that first mount pad contradicts mutually, be used for making first drive screw pivoted second driving motor, first drive screw is parallel with the axis of rotation, first drive screw runs through first mount pad and rather than threaded connection.

Through adopting above-mentioned technical scheme, when first mount pad removed along axis of rotation direction, start second driving motor, second driving motor drives first drive screw and rotates, because first mount pad and first limiting plate are inconsistent for first drive screw drives first mount pad and removes, thereby realizes the removal of first mount pad, makes the removal of first mount pad simple and convenient, stable.

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

1. the flexible packaging plastic bag forming process is used for carrying out coiling treatment after the base material is printed with patterns, obtaining a coiled primary finished product, and then carrying out trimming treatment on the coiled primary finished product, so that alignment of two ends of the subsequent base material in the width direction is facilitated, and the condition that two butt-joint folding edge base materials are staggered or cannot be aligned is reduced.

2. The side surface body is arranged between the front surface body and the back surface body, so that the capacity of the flexible packaging plastic bag in use is increased, and the practicability of the flexible packaging plastic bag is improved. The base material is provided with a portable opening, which is convenient for taking the flexible packaging plastic bag. The base material is provided with an easy-tearing opening which is convenient for tearing the flexible package plastic bag. Set up black detection locating piece on the substrate, be convenient for cut of bag body substrate. Set up black detection location strip on the substrate, be convenient for fix a position the substrate.

3. The utility model provides a side cut device has not only realized the side cut to lapping primary product, because the centre gripping subassembly presss from both sides tightly in lapping primary product treats one side of side cut department, reduces the fold that appears in the substrate, improves the stability that the cutting knife was cut edge to lapping primary product, simultaneously, through cutting this body portion, mutually supporting between the prong, not only makes lapping primary product cut edge neat, but also has improved the intensity of cutting knife. Through the mutual cooperation of two construction bolts, installation cover, be convenient for rotate the cutting knife to accomplish the side cut of lapping primary product, need not set up two cutting mechanism, make the processing of side cut device simple and convenient.

Drawings

Fig. 1 is a schematic structural view of a flexible packaging plastic bag in example 1.

Fig. 2 is a schematic structural view of a dedicated trimming device in embodiment 2.

Fig. 3 is a partial sectional view for illustrating the drive mechanism in embodiment 2.

FIG. 4 is a partial sectional view for showing the mounting mechanism in embodiment 2.

Fig. 5 is a schematic structural view of the first stopper plate according to embodiment 2.

Fig. 6 is a partial sectional view showing the cutting mechanism and the clamping mechanism in example 2.

Fig. 7 is a schematic view showing a structure of a cutter blade in embodiment 2.

FIG. 8 is a partial sectional view of the third moving means and the holding means in embodiment 2 to show the third moving means

Description of reference numerals: 1. a flexible packaging plastic bag; 11. a front face body; 12. a flank body; 13. a back surface body; 14. butting and folding edges; 15. carrying out opening by hand; 16. the opening is easy to tear; 2. coiling the primary finished product; 21. a drum; 22. a rubber annular protection pad; 23. a clamping groove; 3. a base; 31. a support vertical plate; 32. a rotating shaft; 4. a drive mechanism; 41. a first drive motor; 42. a drive gear; 43. a driven gear; 44. a protective cover; 5. an installation mechanism; 51. installing a sleeve; 52. connecting the rotating shaft; 53. a first limit strip; 54. a first limit groove; 55. a second limit strip; 56. a second limit groove; 57. installing a vertical plate; 58. mounting a plate; 59. an adjustment assembly; 591. a first screw; 592. a second screw; 593. an adjustment sleeve; 6. a cutting mechanism; 61. a first mounting seat; 62. a driving cylinder; 63. a first moving assembly; 631. a first drive screw; 632. a first limit plate; 633. a second drive motor; 64. a tool apron; 65. installing a sleeve; 66. installing a bolt; 67. a cutting knife; 671. cutting the body part; 672. a tip portion; 7. a clamping mechanism; 71. a second mounting seat; 72. clamping a vertical plate; 73. a second moving assembly; 731. a second drive screw; 732. a second limiting plate; 733. a third drive motor; 74. a third moving assembly; 741. a slider; 742. a chute; 743. a third drive screw; 744. a fourth drive motor; 75. a clamping assembly; 751. clamping the arc plate; 752. an insertion block; 753. and installing a groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

Example 1

The application embodiment 1 discloses a flexible packaging plastic bag forming process. Referring to fig. 1, the flexible packaging plastic bag 1 is a packaging bag body with one end being sealed and the other end being opened, and the flexible packaging plastic bag 1 includes a front body 11. Two side surface bodies 12 are respectively and fixedly arranged at two ends of the front surface body 11 along the width direction, namely the number of the side surface bodies 12 is two, and the cross section of each side surface body 12 is V-shaped. The two side surfaces 12 are fixed with two rear surfaces 13 at the ends far away from the front surface 11, that is, the number of the rear surfaces 13 is two. One ends of the two back surface bodies 13 far away from the side surface body 12 are respectively bent to form two butt-joint folding edges 14, namely the number of the butt-joint folding edges is two, and the two butt-joint folding edges 14 are fixedly connected together. One end of the front surface body 11 along the length direction, one end of the two side surface bodies 12 along the length direction, and one end of the two back surface bodies 13 along the length direction are fixedly connected together and form a butt joint seal, and the other end of the front surface body 11, the other end of the two side surface bodies 12, and the other end of the two back surface bodies 13 form a butt joint opening. The front surface body 11 and the two back surface bodies 13 are respectively provided with patterns. The packaging bag body is provided with a portable opening 15 at the butt joint sealing position, a waste material block is arranged at the portable opening 15, the edge of the waste material block is fixedly connected with the part of the packaging bag body at the opening position, and the packaging bag body is provided with an easy-tearing opening 16 at the butt joint opening position.

The method comprises the following steps:

s1, selecting a base material, wherein the base material is a transparent base material, and the transparent base material is made of OPP materials.

S2, performing coiling treatment on the surface of the substrate to obtain a coiled substrate;

s3, unwinding the rolled substrate, printing the side of the substrate, and forming a pattern on the substrate, the pattern being located at a middle portion of the substrate in the width direction thereof. When printing patterns, black detection positioning blocks are also printed on the base material, and the black detection positioning blocks are used for positioning the base material and also separating the base material along the length direction of the base material. The black detection positioning strips are printed on the base material, the number of the black detection positioning strips is two, the two black detection positioning strips are located at two ends of the base material in the width direction and located on two sides of the pattern, and the black detection positioning strips are used for positioning the position of the base material in the width direction.

And S4, performing coiling treatment on the base material processed in the step S3 to obtain a coiled primary product 2.

And S5, respectively trimming the two ends of the coiled primary product 2 along the axial direction of the coiled primary product to align the two ends of the coiled primary product 2 along the width direction of the coiled primary product, so as to facilitate subsequent processing.

S6, unfolding the base material processed in the step S5, folding the base material in half along two ends of the width direction of the base material, wherein the folding angle is 180 degrees, so that the base material forms a front body base material and two rear body base materials, then folding one end, away from the front body base material, of the rear body base material, wherein the folding angle is 90 degrees, so that a butt-folded edge base material is formed, and at the moment, the black detection positioning strip is positioned in the butt-folded edge base material, so that the two butt-folded edge base materials are abutted.

And S7, performing heat seal treatment on the two butt-folded base materials of the base materials processed in the step S6 to fixedly connect the two butt-folded base materials together, forming a closed seal by the two butt-folded base materials, folding the closed seal to enable the closed seal to be abutted against the base materials of the rear body, and forming a ring by the rest of the base materials.

And S8, folding the two ends of the base material processed in the step S7 along the width direction respectively, forming a side surface body base material by the folded part, wherein the cross section of the side surface body base material is V-shaped, trimming the closed seal, and removing the black detection positioning strip at the position of the butt-joint folded base material.

S9, performing heat sealing treatment on the base material processed in the step S8 at intervals and uniformly along the length direction of the base material by using a black detection positioning block, so that the front body base material, the rear body base material and the side body base material are fixedly connected together, the heat sealing positions form butt joint sealing, the base material forms a plurality of bag body base materials with two sealed ends, the bag body base material is punched at the position to be cut to form an easy-to-tear opening 16, the bag body base material is opened at the butt joint sealing position to form a portable opening 15, waste material blocks remain at the portable opening 15, and the edge of the waste material blocks is fixedly connected with the bag body base material at the opening part.

And S10, cutting the base material processed in the step S9 at one side of the butt seal to form the flexible packaging plastic bag 1 with one end of the butt seal and one end of the butt opening.

And S11, finishing and packaging the flexible packaging plastic bag 1.

According to the flexible package plastic bag forming process, the base material printed with the patterns is subjected to coiling treatment to obtain a coiled primary finished product 2, then the coiled primary finished product 2 is subjected to edge cutting treatment along two ends of the coiled primary finished product in the axis direction, so that the base materials are aligned along two ends of the coiled primary finished product in the width direction, and the condition that the two butted and folded base materials are staggered or cannot be aligned is reduced. Meanwhile, when the portable opening 15 is carried out, the waste material block does not influence the processing of the bag body base material and is not cut off, so that the waste material block does not need to be recycled, and the flexible packaging plastic bag 1 is convenient to produce.

Example 2

The embodiment 2 of the application discloses a special side cut device. Referring to fig. 2 and 3, the base 3 is rectangular, and two ends of the base 3 in the length direction are respectively and vertically and fixedly provided with two supporting vertical plates 31, that is, the number of the supporting vertical plates 31 is two. The two supporting risers 31 are respectively rotatably connected with two rotating shafts 32, namely the number of the rotating shafts 32 is two. One of the supporting risers 31 is provided with a drive mechanism 4 for rotating the rotating shaft 32. A coiled primary finished product 2 is arranged between the two rotating shafts 32, and the coiled primary finished product 2 is sleeved on the roller 21. Referring to fig. 4 again, a plurality of rubber annular protection pads 22 are uniformly arranged on the outer circumferential surface of the drum 21 along the length direction thereof, a clamping groove 23 is formed in the outer side wall of the drum 21, and the rubber annular protection pads 22 are clamped in the clamping groove 23. The two rotating shafts 32 are respectively provided with mounting mechanisms 5 for mounting the rollers 21, i.e., the number of the mounting mechanisms 5 is two. A cutting mechanism 6 for cutting edges of the coiled primary product 2 is arranged between the two supporting vertical plates 31 and on one side of the rotating shaft 32. A clamping mechanism 7 which is convenient for clamping the coiled primary product 2 is arranged between the two supporting vertical plates 31 and above the rotating shaft 32.

Referring to fig. 3, the driving mechanism 4 includes a first driving motor 41, a driving gear 42 is fixedly provided at an output end of the first driving motor 41, a driven gear 43 engaged with the driving gear 42 is provided at one side of the driving gear 42, and the driven gear 43 is fixedly provided on an outer circumferential surface of the rotating shaft 32. The side of the supporting vertical plate 31 is provided with a protective cover 44, the first driving motor 41, the driving gear 42 and the driven gear 43 are all positioned in the protective cover 44, and the protective cover 44 is detachably mounted on the supporting vertical plate 31 through bolts.

Referring to fig. 3 and 4, the mounting mechanism 5 includes a mounting sleeve 51 disposed on the outer peripheral surface of the rotating shaft 32 and slidably connected thereto, and a connecting shaft 52 disposed in the drum 21 and slidably connected thereto. The peripheral surface of axis of rotation 32 evenly sets firmly four first spacing strips 53 along its circumference, and the axis of first spacing strip 53 and axis of rotation 32 is parallel. The inner side wall of the mounting sleeve 51 is provided with a first limiting groove 54 matched with the first limiting strip 53, and the first limiting strip 53 slides in the first limiting groove 54. The axis of the connecting rotary shaft 52 coincides with the axis of the rotary shaft 32. Four second limiting strips 55 are uniformly and fixedly arranged on the peripheral surface of the connecting rotating shaft 52 along the circumferential direction, and the second limiting strips 55 are parallel to the axis of the connecting rotating shaft 52. The inside wall of the drum 21 is provided with a second limit groove 56 matched with the second limit strip 55, and the second limit strip 55 slides in the second limit groove 56. A mounting vertical plate 57 is fixedly arranged between the mounting sleeve 51 and the connecting rotating shaft 52, a mounting plate 58 is fixedly arranged on the outer peripheral surface of the rotating shaft 32, and the mounting plate 58 is an annular plate. An adjusting component 59 for adjusting the distance between the mounting vertical plate 57 and the mounting plate 58 is arranged between the mounting vertical plate and the mounting plate.

Referring to fig. 4, the adjustment assembly 59 includes a first screw 591 fixed to a side of the mounting riser 57 and a second screw 592 fixed to a side of the mounting plate 58. The first screw 591 is threaded in the opposite direction as the second screw 592. An adjusting sleeve 593 is arranged between the first screw 591 and the second screw 592, one end of the adjusting sleeve 593 is sleeved on the outer peripheral surface of the first screw 591 and is in threaded connection with the first screw 591, and the other end of the adjusting sleeve 593 is sleeved on the outer peripheral surface of the second screw 592 and is in threaded connection with the second screw 592.

Referring to fig. 5 and 6, the cutting mechanism 6 includes a first mounting seat 61 provided at one side of the rotation shaft 32, and a driving cylinder 62 fixed to the first mounting seat 61. A first moving assembly 63 for moving the first installation seat 61 along the axial direction of the rotating shaft 32 is arranged between the first installation seat 61 and the two supporting vertical plates 31. Referring to fig. 7 again, one end of the piston rod of the driving cylinder 62 is provided with a tool apron 64, one end of the tool apron 64 is fixedly provided with an installation sleeve 65 which is sleeved on the piston rod of the driving cylinder 62, the outer peripheral surface of the installation sleeve 65 is symmetrically provided with two installation bolts 66, the screw rods of the installation bolts 66 penetrate through the side wall of the installation sleeve 65 and extend into the piston rod of the driving cylinder 62, and the screw rods of the installation bolts 66 are respectively in threaded connection with the installation sleeve 65 and the piston rod of the driving cylinder 62. One end that blade holder 64 kept away from driving cylinder 62 sets firmly cutting knife 67, and cutting knife 67 includes cutting this part 671, and the cross-section of cutting this part 671 personally submits isosceles trapezoid, and the one end that cutting this part 671 kept away from blade holder 64 sets firmly prong portion 672, and the cross-section of prong portion 672 also is isosceles trapezoid, and the distance between the prong portion 672 along cutting this part 671 width direction both ends reduces to keeping away from cutting this part 671 direction gradually, and until being zero, the smooth and smooth transition of junction of prong portion 672 and cutting this part 671.

Referring to fig. 6, the first moving assembly 63 includes a first driving screw 631 rotatably connected between the two supporting risers 31, the axes of the first driving screw 631 and the rotating shaft 32 are parallel, and the first driving screw 631 penetrates through the first mounting seat 61 and is in threaded connection therewith. Two support risers 31 have set firmly first limiting plate 632 along 3 width direction's of base one end between, and first mount pad 61 and first limiting plate 632 side are inconsistent. One of the supporting vertical plates 31 is fixedly provided with a second driving motor 633, and the output end of the second driving motor 633 is fixedly connected with one end of the first driving screw 631.

Referring to fig. 6 and 8, the clamping mechanism 7 includes a second mounting seat 71 disposed above the rotating shaft 32, and two clamping risers 72 slidably connected to the second mounting seat 71, respectively. The second mounting seat 71 is disposed along the width direction of the base 3, i.e., the second mounting seat 71 is perpendicular to the axis of the rotating shaft 32. A second moving component 73 for moving the second installation seat 71 along the axial direction of the rotating shaft 32 is arranged between the second installation seat 71 and the two supporting vertical plates 31. The second mounting seat 71 is provided with a third moving assembly 74 for moving the two clamping risers 72. The bottom ends of the two clamping risers 72 are respectively provided with a clamping component 75.

Referring to fig. 6, the second moving assembly 73 includes a second driving screw 731 rotatably connected between the two supporting risers 31, the second driving screw 731 is parallel to the axis of the rotating shaft 32, and the second driving screw 731 passes through the second mounting seat 71 and is threadedly connected thereto. A second limiting plate 732 is fixedly arranged between the top ends of the two supporting vertical plates 31, and the side surfaces of the second mounting seat 71 and the second limiting plate 732 are abutted. One of the supporting vertical plates 31 is fixedly provided with a third driving motor 733, and an output end of the third driving motor 733 is fixedly connected with one end of the second driving screw 731.

Referring to fig. 8, the third moving assembly 74 includes two sliding blocks 741 fixed to the top ends of the two clamping vertical plates 72, respectively, a sliding slot 742 adapted to the sliding block 741 is disposed at the bottom end of the second mounting seat 71 along the length direction, and the sliding block 741 slides in the sliding slot 742. A third driving screw 743 is rotatably connected to the sliding slot 742, the third driving screw 743 is perpendicular to the rotating shaft 32, the third driving screw 743 penetrates through and is threadedly connected to the two sliders 741, and the directions of threads at two ends of the third driving screw 743 are opposite, that is, the directions of threads of the two sliders 741 are opposite. A fourth driving motor 744 is arranged on the second mounting seat 71, and an output end of the fourth driving motor 744 is fixedly connected with one end of the third driving screw 743.

Referring to fig. 8, the clamping assembly 75 includes a clamping arc plate 751 adapted to the rolled preform 2, wherein the inner curved surface of the clamping arc plate 751 abuts against the outer circumferential surface of the rolled preform 2. The outer curved surface of the clamping arc plate 751 is fixedly provided with an inserting block 752 in the middle, the side surface of the clamping vertical plate 72 is provided with a mounting groove 753 matched with the inserting block 752, and the inserting block 752 is positioned in the mounting groove 753.

In the special trimming device of the embodiment of the present application, the roller 21 is mounted on the connecting rotating shaft 52, and then the roller 21 is clamped between the two connecting rotating shafts 52 by the first screw 591, the second screw 592 and the adjusting sleeve 593. Then, the third driving motor 733 is started, the second mounting seat 71 is driven to move, the fourth driving motor 744 is started, and the two clamping vertical plates 72 are driven to move, so that the two clamping arc plates 751 are clamped on the primary coiled product 2, and the two clamping arc plates 751 are arranged on one side of the primary coiled product 2 at the position to be cut. Start second driving motor 633 to drive first mount pad 61 and remove, start and drive actuating cylinder 62, and drive cutting knife 67 and remove, cutting knife 67 stretches into and cuts in the primary finished product 2 of lapping. And starting the first driving motor 41, driving the coiled primary finished product 2 to rotate, and cutting the coiled primary finished product 2 by the cutting knife 67 to finish the edge cutting of one end of the coiled primary finished product 2. Then, the cutting knife 67 and the clamping arc plate 751 are moved to the other end of the coiled primary product 2, and the cutting knife 67 is rotated by 180 degrees through the two mounting bolts 66, so that the edge cutting of the other end of the coiled primary product 2 is completed. Because the cutting knife 67 includes the cutting body portion 671 and the pointed head portion 672, and through mutually supporting between the cutting body portion 671 and the pointed head portion 672, not only the edge of the coiled primary product 2 is trimmed neatly, but also the strength of the cutting knife 67 is improved. Through cutting knife 67, the mutually supporting between two centre gripping arc plates 751 reduce the substrate and appear the fold, improve the stability that cutting knife 67 was cut edge to lapping primary product 2.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a flexible packaging plastic bag forming process, flexible packaging plastic bag (1) is the one end butt joint and seals, one end butt joint open-ended packaging bag body, its characterized in that: the method comprises the following steps:

s1, selecting a base material;

s2, performing coiling treatment on the substrate to obtain a coiled substrate;

s4, coiling the base material processed in the step S3 to obtain a coiled primary finished product (2);

s5, respectively trimming the two ends of the coiled primary product (2) along the axial direction;

s10, cutting the substrate processed in the step S9 at one side of the butt seal to form a soft packaging plastic bag (1) with one end of the butt seal and one end of the butt opening;

s11, arranging and packaging the flexible packaging plastic bag (1).

2. The process for forming a plastic bag for flexible packaging according to claim 1, wherein: the flexible packaging plastic bag (1) comprises a front surface body (11), two side surface bodies (12) and two back surface bodies (13), wherein the two side surface bodies (12) and the two back surface bodies (13) are fixedly arranged at two ends of the front surface body (11) along the width direction of the front surface body respectively, the cross section of the side surface body (12) is in a V shape, the two back surface bodies (13) correspond to the two side surface bodies (12) one by one, one end of the side surface body (12), which is far away from the front surface body (11), is fixedly connected with one end of the back surface body (13) along the width direction of the back surface body, one ends of the two back surface bodies (13), which are far away from the side surface body (12), are bent to form a butt joint folding edge (14), the two butt joint folding edges (14) are fixedly connected together, one end of the front surface body (11) along the length direction, one ends of the, the other end of the front surface body (11) and the two back surface bodies (13) are provided with butt-joint openings respectively.

3. The process for forming a plastic bag for flexible packaging according to claim 1, wherein: in step S9, after the heat seal treatment and the bag body base material are formed, the bag body base material is opened at the butt sealing position to form a hand opening (15).

4. The process for forming a plastic bag for flexible packaging according to claim 3, wherein: and a waste material block is remained at the position of the portable opening (15), and the edge of the waste material block is fixedly connected with the part of the bag body base material at the opening.

5. The process for forming a plastic bag for flexible packaging according to claim 1, wherein: in step S9, after the heat sealing treatment and the bag base material are formed, holes are punched in the bag base material at the positions to be cut, and an easy-to-tear opening (16) is formed.

6. The process for forming a plastic bag for flexible packaging according to claim 1, wherein: in step S3, a black detection positioning block for positioning is printed on the substrate at the position to be cut.

7. The process for forming a plastic bag for flexible packaging according to claim 1, wherein: in step S3, black detection positioning bars for positioning are printed on both ends of the base material in the width direction and on both sides of the pattern, respectively;

8. The utility model provides a special side cut device which characterized in that: the trimming device is used for trimming the coiled primary product (2), the coiled primary product (2) is sleeved on the roller (21), and comprises a base (3), two supporting vertical plates (31) fixedly arranged on the base (3), two rotating shafts (32) respectively rotatably connected to the supporting vertical plates (31), a driving mechanism (4) used for rotating the rotating shafts (32), a cutting mechanism (6) arranged between the two supporting vertical plates (31) and used for trimming the coiled primary product (2), and a clamping mechanism (7) arranged between the two supporting vertical plates (31) and used for clamping the coiled primary product (2), wherein the two rotating shafts (32) are respectively provided with an installation mechanism (5) used for installing the coiled primary product (2);

the cutting mechanism (6) comprises a first mounting seat (61), a first moving assembly (63) driving the first mounting seat (61) to move along the axis direction of the rotating shaft (32), a driving cylinder (62) fixedly arranged on the first mounting seat (61), a cutter holder (64) arranged at one end of a piston rod of the driving cylinder (62), a mounting sleeve (65) fixedly arranged at one end of the cutter holder (64), and two mounting bolts (66) symmetrically arranged on the outer peripheral surface of the mounting sleeve (65), wherein screw rods of the mounting bolts (66) penetrate through the side wall of the mounting sleeve (65) and extend into the piston rod of the driving cylinder (62) and are respectively in threaded connection with the mounting sleeve (65), and cutting knives (67) are fixedly arranged on the cutter holder (64);

the cutting knife (67) comprises a cutting body part (671) with an isosceles trapezoid-shaped cross section and a pointed head part (672) fixedly arranged at one end of the cutting body part (671) along the length direction of the cutting body part, the cross section of the pointed head part (672) is also isosceles trapezoid-shaped, the distance between the two ends of the pointed head part (672) along the width direction of the cutting body part (671) is gradually reduced to zero along the direction far away from the cutting body part (671), and the connecting part of the pointed head part (672) and the cutting body part (671) is in smooth transition;

the clamping mechanism (7) comprises a second mounting seat (71), a second moving assembly (73) for driving the second mounting seat (71) to move along the axial direction of the rotating shaft (32), two clamping vertical plates (72) connected to the second mounting seat (71) in a sliding mode, and two clamping assemblies (75) respectively arranged at the bottom ends of the two clamping vertical plates (72), wherein a third moving assembly (74) for enabling the two clamping vertical plates (72) to approach or separate from each other is arranged on the second mounting seat (71);

installation mechanism (5) establish at axis of rotation (32) outer peripheral face and rather than the installation sleeve (51) of sliding connection, with axis coincidence's of axis of rotation (32) connection pivot (52), set firmly installation riser (57) between installation sleeve (51) and connection pivot (52), it establishes in cylinder (21) and rather than sliding connection to connect pivot (52) cover, the outer peripheral face of axis of rotation (32) has set firmly mounting panel (58), be provided with between mounting panel (58) and installation riser (57) and adjust between the two adjusting part (59) of distance.

9. The special trimming device according to claim 8, wherein: the outer peripheral face of cylinder (21) has a plurality of rubber ring shape protection pads (22) along its length direction joint, a plurality of joint grooves (23) have been seted up to the lateral wall of cylinder (21).

10. The special trimming device according to claim 8, wherein: first removal subassembly (63) including rotate connect first drive screw (631) between two support risers (31), set firmly between two support risers (31) and with first limiting plate (632) that first mount pad (61) contradict, be used for making first drive screw (631) pivoted second driving motor (633), first drive screw (631) and axis of rotation (32) are parallel, first drive screw (631) run through first mount pad (61) and rather than threaded connection.