CN113199816B - Manufacturing process of single-material printing bag - Google Patents
Manufacturing process of single-material printing bag Download PDFInfo
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- CN113199816B CN113199816B CN202110420641.2A CN202110420641A CN113199816B CN 113199816 B CN113199816 B CN 113199816B CN 202110420641 A CN202110420641 A CN 202110420641A CN 113199816 B CN113199816 B CN 113199816B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B70/16—Cutting webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/26—Folding sheets, blanks or webs
- B31B70/52—Folding sheets, blanks or webs by reciprocating or oscillating members other than plungers and dies, e.g. by fingers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/88—Printing; Embossing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
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Abstract
The application relates to a manufacturing process of a single-material printing bag, which comprises the following steps: step one, preparing raw materials; step two, material placement; step three, discharging materials; step four, printing; step five, drying; step six, rolling; and step seven, bag making. The printing forming quality of the packaging bag made of the single material can be guaranteed.
Description
Technical Field
The application relates to the field of packaging bags, in particular to a manufacturing process of a single-material printing bag.
Background
The packaging bag is generally a plastic packaging bag, namely, plastic is used as a raw material, and the plastic packaging bag is widely used for packaging various articles in life and production, but after the plastic packaging bag is used, the treatment of the plastic packaging bag is always an industrial problem, and large pollution is generated.
At present, the plastic packaging treatment approaches after use include recycling and degradation, and the problems encountered by recycling are as follows: the compounding of domestic soft package enterprises is basically the compounding of films made of various different materials, such as PA// PE, BOPP// VMPET// PE, VMPET// CPP, PET// AL// PE and other structures, the recovery of the composite materials is a great problem, the treatment according to the current separation technology costs a great deal of economic cost, and the treatment effect is not satisfactory, so the solution of the industry is developed to 'single material conversion'. The degradable bottleneck problem is: how to grasp the dimension of degradable and packaging protection functions, not only how to solve the problems of barrier property and degradation timeliness of the packaging, but also the problem of the degraded micro-plastic; the two treatment methods are more advantageous in terms of technical feasibility and maturity by adopting a single-material composite membrane rather than a recyclable way, and the single composite membrane mainly adopted at present is a PE membrane.
In view of the above-mentioned related technologies, the inventor believes that the printing process of the present packaging bag made of a single recyclable material is still imperfect, the tensile strength of the PE film is low, the tensile elongation is high, the conventional gravure printing machine is used for printing, if the printing speed is high, the film is very easy to stretch and wrinkle, the color register is not accurate, the tension control requirement on the equipment during printing is very strict, and the printing speed of the gravure printing machine cannot be fast opened at all, which greatly affects the production efficiency.
Disclosure of Invention
In order to guarantee the printing forming quality of single material wrapping bag, this application provides a single material printing bag manufacture craft.
The application provides a single material printing bag manufacture craft adopts following technical scheme:
a manufacturing process of a single-material printing bag comprises the following steps:
step one, preparing raw materials: selecting a PE film made of a single material as a raw material;
step two, material placement: placing the PE film in printing equipment;
step three, discharging materials: discharging the PE film, wherein the tension of the discharged material is controlled to be 35-50N, and the traction tension of the discharged material is 35-40N;
step four, printing: printing one side of the PE film along with the transmission of the PE film;
step five, drying: drying the printed PE film, wherein the drying temperature is controlled to be 35-40 ℃;
step six, rolling: winding the printed PE film, wherein the winding tension is controlled to be 50-60N, and the winding traction tension is controlled to be 40-70N;
and step seven, bag making.
By adopting the technical scheme, when discharging is adopted, the tension of the PE film is controlled to be 30-50N, the discharging traction tension is 35-40N, the rolling tension is controlled to be 50-60N, and the rolling traction tension is controlled to be 40-70N, so that the stretching of the PE film can be effectively ensured, the stretching and wrinkling of the PE film are avoided, and the printing accuracy and the printing clarity of the PE film are ensured.
Optionally, the bag making comprises the following steps:
1. laminating the two unprinted sides of the printed PE films and simultaneously conveying the two unprinted sides;
2. performing heat sealing, namely performing transverse heat sealing and longitudinal heat sealing along with the conveying process of the two mutually attached PE films to form a bag body;
3. and cutting, namely cutting waste edges on two sides of the bag body along with the conveying of the heat-sealed bag body, and cutting one heat-sealed part of each bag body to form a bag body with three sides heat-sealed and one side open.
Through adopting above-mentioned technical scheme, adopt two PE membrane heat seal bags, the heat-seal high quality of the bag body, compound process does not have the incomplete hourglass scheduling problem of glue solution, the recycle of the bag body of being convenient for.
Optionally, during heat sealing, the temperature of the transverse sealing knife is 170-.
Through adopting above-mentioned technical scheme, through the horizontal sword of sealing of control and the temperature of indulging the sword, can guarantee the combined quality of the bag body, guarantee the bonding strength of the bag body, and avoid the heat-seal sword to scald the bag body.
Optionally, when the PE film is printed and unreeled, the static protection film is arranged on one side of the non-printing surface of the PE film, and the static protection film is unreeled synchronously, so that the static protection film is attached to one side of the non-printing surface of the PE film in an adsorption mode, the static protection film and the PE film are conveyed synchronously, and the static protection film and the PE film are reeled together after printing and drying are completed.
Through adopting above-mentioned technical scheme, the static protective film that adopts can protect the PE membrane at PE membrane conveying, printing stoving in-process to avoid the PE membrane to receive the friction damage, in addition, after the printing of accomplishing the protective film, adopt static protective film and the common rolling of PE membrane, can prevent the friction damage PE membrane that produces between the adjacent two-layer PE membrane.
Optionally, the bag making comprises the following steps:
1. releasing the film, namely releasing the printed PE film, and stripping the static protection film from the surface of the PE film;
2. folding the film, namely folding the discharge end of the PE film in half according to the length of the actually formed bag body to form a folded film, and further enabling the folded film and the corresponding part of the PE film to form two films of the bag body;
3. heat sealing, namely heat sealing the two sides of the two films of the bag body to form a bag body with an opening at one side;
4. and cutting the bag body part at the tail end of the PE film to complete bag body making and forming.
Through adopting above-mentioned technical scheme, the single membrane composite forming bag body of adoption only needs carry out the heat-seal to the both sides of the bag body, then the cutting, easy operation, convenient operation.
Optionally, bag making equipment is used for making bags, the bag making equipment comprises a material placing platform, a slot is formed in the middle of the material placing platform, hot pressing rollers are rotatably connected to two sides, corresponding to the slot, below the material placing platform along the length direction of the slot, heat sealing knives capable of tending to the mutual approaching direction movement of the two hot pressing rollers are vertically arranged at positions, corresponding to two ends of each hot pressing roller, below the material placing platform, inserting knives capable of being downwards inserted into the slot are vertically arranged on the upper side of the material placing platform, the lengths of the inserting knives and the hot pressing rollers are smaller than the width of the PE film, and pressing blocks capable of being abutted against the inserting knives and moving downwards along with the inserting knives in a synchronous mode are arranged below the slot, corresponding to the heat sealing knives.
By adopting the technical scheme, after the PE film is conveyed to the discharging platform, the PE film moves downwards through the slotting tool, and the slotting tool and the pressing block are matched with each other to clamp the position of the PE film above the slot, namely the position of the middle part of the area of the bag film at the discharging end of the PE film, then the PE film is pushed to move downwards along with the synchronous downward movement of the slotting tool and the pressing block, so that the two sides of the PE film corresponding to the slotting tool are both subjected to hot pressing through the hot pressing roller, the PE films at the two sides of the slotting tool are folded and shaped in the middle part of the area of the bag film to form two films, then the hot sealing tools at the two sides of the slotting tool tend to move in the direction close to each other and abut against the film at the two sides of the slotting tool, the side edges of the two films are subjected to heat sealing, and a bag body with one end open can be formed at the discharging end of the PE film.
Optionally, the side wall of the material placing platform corresponding to the slot is provided with a cutter capable of moving along the width direction of the slot.
Through adopting above-mentioned technical scheme, after the heat-seal of the completion bag body, the slotting tool rises, extracts from the fashioned bag body of heat-seal, then, the width direction motion of cutter along the slot can realize cutting of the bag body.
Optionally, a clamping piece capable of clamping the PE film is arranged on the pressing block, a vertical driving piece capable of driving the pressing block to move in the vertical direction is arranged on the lower side of the discharging platform corresponding to the pressing block, and a horizontal driving piece capable of driving the vertical driving piece to move horizontally is further arranged on the lower side of the discharging platform.
Through adopting above-mentioned technical scheme, after slotting tool downstream promotes PE membrane butt in the briquetting, the holder motion can press from both sides tight PE membrane, then can drive the briquetting downstream through vertical driving piece, drags PE membrane downstream simultaneously, and the heat-seal bag body finishes, and the back bag body cuts the back, and two are pushed the briquetting and send out a bag body centre gripping to drive the briquetting horizontal motion through horizontal driving piece, leave a bag body downside, rethread hot compression roller rotates, can realize the whereabouts of the bag body.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when discharging is adopted, the tension of the PE film is controlled to be 30-50N, the discharging traction tension is 35-40N, the winding tension is controlled to be 50-60N, and the winding traction tension is controlled to be 40-70N, so that the stretching of the PE film can be effectively ensured, the stretching and wrinkling of the PE film are avoided, and the printing accuracy and the printing clarity of the PE film are ensured;
2. the adopted static protective film can protect the PE film in the processes of conveying, printing and drying the PE film, so that the PE film is prevented from being damaged by friction;
and 3, after the PE film is conveyed to the discharging platform, the PE film moves downwards through the slotting tool, the slotting tool and the pressing block are matched with each other and clamped at the position, above the slot, of the PE film, namely the position of the middle part of a bag film area at the discharging end of the PE film, then the PE film is pushed to move downwards along with the synchronous downward movement of the slotting tool and the pressing block, the two sides, corresponding to the slotting tool, of the PE film are subjected to hot pressing through the hot pressing roller, the PE films on the two sides of the slotting tool are folded and shaped in the middle part of the bag film area to form two films, then the heat sealing tools on the two sides of the slotting tool tend to move in the direction close to each other and abut against the film sheets on the two sides of the slotting tool, and the side edges of the two films are subjected to heat sealing, so that a bag body with an opening at one end is formed at the discharging end of the PE film.
Drawings
FIG. 1 is a process flow diagram of a single material printed bag making process of the present application.
Fig. 2 is a schematic structural view of a discharge platform in a third embodiment of the single-material printed bag manufacturing process of the present application.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
Fig. 4 is a schematic view of a slotting tool structure of a third embodiment of the single-material printed bag manufacturing process of the present application.
Fig. 5 is a schematic structural diagram of a hot press roller according to a third embodiment of the single-material printed bag manufacturing process of the present application.
Description of reference numerals: 1. a material placing platform; 11. a slot; 12. a conveying roller; 2. a carriage; 21. a hot press roll; 22. pushing a spring; 23. a yielding groove; 3. inserting a knife; 31. a abdication gap; 4. a pressing block; 41. a clamping member; 42. a vertical drive; 43. a horizontal drive member; 5. a heat seal knife; 51. a horizontal pusher; 6. a cutter; 61. a pusher member.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a manufacturing process of a single-material printing bag.
The first embodiment is as follows:
referring to fig. 1, a manufacturing process of a single material printing bag comprises the following steps:
step one, preparing raw materials: selecting a PE film made of a single material as a raw material;
step two, material placement: the printing equipment can adopt an intaglio printing machine, and the PE film is placed on a film placing roller of the intaglio printing machine;
step three, discharging materials: discharging the PE film through a film discharging roller of an intaglio printing press, wherein the tension of the discharged material is controlled to be 35-50N, and the traction tension of the discharged material is controlled to be 35-40N;
step four, printing; selecting a corresponding printing roller according to requirements, and printing one side of the PE film through the printing roller of the gravure printing machine along with the transmission of the PE film;
step five, drying: continuously conveying the printed PE film into an oven, and controlling the drying temperature in the oven to be 35-40 ℃;
step six, rolling: winding the PE film through film winding equipment, wherein the winding traction tension is controlled to be 40-70N, and the winding tension is controlled to be 50-60N;
step seven, bag making; and (3) placing the printed PE film in a packaging bag making machine for heat sealing and cutting to form a bag body, controlling the temperature of a transverse sealing knife of the bag making machine to be 170-195 ℃, and controlling the temperature of a longitudinal sealing knife to be 230-140 ℃.
The implementation principle of the manufacturing process of the single-material printing bag in the embodiment of the application is as follows: when the material is discharged, the tension of the PE film is controlled to be 30-50N, the drawing tension of the material is 35-40N, the winding tension is controlled to be 50-60N, the winding drawing tension is controlled to be 40-70N, the PE film can be effectively prevented from stretching and wrinkling, the printing accuracy and the printing clarity of the PE film are guaranteed, the composite quality of the bag body can be guaranteed through the controlled temperature of the transverse sealing knife and the longitudinal sealing knife, the bonding strength of the bag body is guaranteed, and the bag body is prevented from being scalded by the heat sealing knife 5.
The second embodiment: referring to fig. 1, a manufacturing process of a single-material printing bag comprises the following steps:
the difference from the first embodiment is that: step seven, bag making comprises the following steps:
1. film combination: selecting two PE films which are printed according to the requirement of a prefabricated bag body, respectively placing the two PE films on two material placing frames of a packaging bag making machine, mutually attaching the unprinted sides of the two PE films, simultaneously conveying, and keeping the synchronous precision of the two PE films in the conveying process;
2. and (3) heat sealing: the two PE films are transversely heat-sealed and longitudinally heat-sealed according to the size of the prefabricated bag body along with the synchronous transmission of the two mutually-jointed PE films to form a plurality of bag bodies connected end to end, the temperature of a heat sealing knife 5 is kept as 170-plus-195 ℃ for the temperature of a transverse sealing knife, and 230-plus-140 ℃ for the temperature of a longitudinal sealing knife;
3. cutting: the waste edges are cut on the two sides of the bag body along with the conveying of the end-to-end bag body after heat sealing according to the size of the bag body, and the heat sealing part on one side of each bag body is cut along with the conveying of each bag body to form a bag body with three sides heat-sealed and one side open.
The implementation principle of the manufacturing process of the single-material printing bag in the embodiment of the application is as follows: two PE films are adopted for film-combining and heat-sealing, the operation is simple, and the processing quality is high.
Example three: referring to fig. 1, a manufacturing process of a single-material printing bag comprises the following steps:
step one, preparing raw materials: selecting a PE film made of a single material as a raw material, and selecting an electrostatic protection film as a protection film;
step two, material placement: the film placing equipment adopts film placing equipment at least provided with two film placing rollers, the PE film is placed on one film placing roller of the film placing equipment, the static protection film is placed on the other film placing roller of the film placing equipment, and the static protection film is positioned on one side, away from the PE film, of the PE film;
step three, discharging materials: synchronously discharging the PE film and the static protective film through two film discharging rollers, keeping the discharging tension of the PE film at 35-50N during discharging, keeping the drawing tension of discharging at 35-40N, adsorbing the static protective film on the non-printed side of the PE film after discharging the PE film and the static protective film, and then continuously keeping the PE film and the static protective film to be synchronously conveyed;
step four, printing; the printing equipment can adopt an intaglio printing machine, selects a corresponding printing roller according to requirements, and prints one side of the PE film far away from the static protection film through the printing roller of the intaglio printing machine along with the transmission of the PE film and the static protection film;
step five, drying: continuously conveying the printed PE film and the static protection film attached to the non-printing side of the PE film into an oven, and controlling the drying temperature in the oven to be 35-40 ℃;
step six, rolling: and (3) rolling the PE film and the static protection film through film rolling equipment, wherein in the rolling process, the rolling traction tension of the PE film is controlled to be 40-70N, the rolling tension is controlled to be 50-60N, the PE film and the static protection film are rolled together, and the static protection film interval is kept between two adjacent layers of the PE film after rolling.
Step seven, bag making:
1. releasing the film, namely releasing the printed PE film by using film releasing equipment, and stripping and rolling the static protection film from the surface of the PE film in the PE film releasing process;
2. folding the film, conveying the PE film stripped of the static protection film to bag making equipment, folding the discharge end of the PE film in half according to the length of the actually formed bag body to form a folded film, and further enabling the folded film and the corresponding part of the PE film to form two films of the bag body;
3. heat sealing, namely heat sealing the two sides of the two films of the bag body to form a bag body with an opening at one side;
4. and cutting the bag body part at the tail end of the PE film to complete bag body making and forming.
Referring to fig. 2 and fig. 3, wherein, the bag making equipment includes the blowing platform 1 that the level set up, blowing platform 1 is the rectangle, and the vertical slot 11 of having seted up in the length direction middle part of blowing platform 1, the length direction of slot 11 is the same with the width direction of blowing platform 1, the upside of blowing platform 1 rotates and is connected with many conveying rollers 12, the axis direction of conveying roller 12 is the same with the length direction of slot 11, many conveying rollers 12 set up in the one side that slot 11 is close to blowing platform 1 feed end, still be provided with on the blowing platform 1 and drive many conveying rollers 12 synchronous rotation's actuating mechanism, actuating mechanism can be synchronous belt drive mechanism, also can be chain drive mechanism. After the PE film is conveyed to the discharging platform 1, the PE film can be conveyed continuously through the rotation of the conveying rollers 12.
Referring to fig. 2 and 3, the two sides of the slot 11 below the discharge platform 1 are connected with the sliding frame 2 in a sliding manner, the sliding direction of the sliding frame 2 is perpendicular to the length direction of the slot 11, the sliding frame 2 is connected with the hot pressing roller 21 in a rotating manner, the axial direction of the hot pressing roller 21 is the same as the length direction of the slot 11, and the length of the hot pressing roller 21 is smaller than the width of the PE film. The blowing platform 1 corresponds two balladeur train 2 and all is fixed connected with pushing away spring 22 in the one side of keeping away from each other, and under the normality, pushes away spring 22 and can promote two balladeur train 2 and tend the direction motion that is close to each other. The vertical slotting tool 3 that is provided with of upside that the blowing platform 1 corresponds slot 11, the length direction of slotting tool 3 is the same with the length of slot 11, and blowing platform 1 upside still is provided with and can drives slotting tool 3 downstream to inserting the elevating system who locates in slot 11, and elevating system can select for the lift cylinder but not only be limited to the lift cylinder.
Referring to fig. 2 and 3, a pressing block 4 is horizontally arranged at the middle part of the discharging platform 1 corresponding to the length direction of the slot 11, a clamping piece 41 capable of clamping a PE film is arranged on the pressing block 4, the clamping piece 41 comprises pneumatic clamping jaws fixedly connected to the two ends of the pressing block 4, two clamping fingers of each pneumatic clamping jaw can move towards the middle part of the pressing block 4 in the width direction, a abdicating notch 31 (refer to fig. 4) is arranged at the position of the slotting tool 3 corresponding to the two pneumatic clamping jaws for clamping the bag film, a vertical driving piece 42 capable of driving the pressing block 4 to move in the vertical direction is arranged at the lower side of the pressing block 4, the vertical driving piece 42 can be a vertical driving cylinder, a telescopic rod of the vertical driving cylinder is fixedly connected to the lower side of the pressing block 4, a horizontal driving piece 43 capable of driving the vertical driving cylinder to move is arranged at one side of the discharging platform 1 corresponding to the vertical driving cylinder, the horizontal driving piece 43 can be a horizontal driving cylinder arranged horizontally, the cylinder body of the horizontal driving cylinder is fixedly connected with the blanking platform, and the telescopic rod of the horizontal driving cylinder is fixedly connected with the cylinder body of the vertical driving cylinder. The two heat pressing rollers 21 are provided with relief grooves 23 (see fig. 5) at positions corresponding to the pressing blocks 4, so that the pressing blocks 4 can move vertically.
Referring to fig. 2 and 3, when the PE film is conveyed to the discharge platform 1, the middle position of a bag film region on the PE film is aligned with the slot 11, the slotting tool 3 starts to move downward and abuts against the middle position of the bag film region of the PE film, then continues to move downward along with the slotting tool 3, so that the PE film pushed by the slotting tool 3 abuts against the middle part of the pressing block 4, then continues to move downward along with the slotting tool 3, the pressing block 4 synchronously moves downward and is clamped on the folding part of the bag film by the clamping fingers of the two pneumatic clamping jaws, meanwhile, the PE film is pushed downward along with the slotting tool 3 and is also hot-pressed by the two hot-pressing rollers 21, thereby setting the folded state of the PE film and realizing the forming of two films in the bag body.
Referring to fig. 2 and 3, the heat-sealing knives 5 are slidably connected to the two ends of each carriage 2 below the material-placing platform 1, the heat-sealing knives 5 on the two sides of the slot 11 are correspondingly arranged, the sliding direction of the heat-sealing knives 5 is the same as that of the carriages 2, the horizontal pushing members 6151 are arranged on the material-placing platform 1 at the sides away from the heat-sealing knives 5 on the two sides of the chute, the horizontal pushing members 6151 can be horizontal pushing cylinders, the cylinder bodies of the horizontal pushing cylinders are fixedly connected to the material-placing platform 1, the telescopic rods of the horizontal pushing cylinders are fixedly connected to the heat-sealing knives 5, when the telescopic rods of the horizontal pushing cylinders extend, the heat-sealing knives 5 on the two sides of the chute can be abutted against each other, thereby realizing the heat-sealing of the bag body,
referring to fig. 2 and 3, a cutting knife 6 capable of moving along the width direction of the slot 11 is arranged on one side wall of the emptying platform 1 corresponding to the slot 11. The lower side of the discharging platform 1 is also provided with a pushing piece 61 capable of dragging the cutter 6 to move, and the pushing piece 61 can be a driving cylinder.
Referring to fig. 2 and 3, after the heat sealing of the bag body is completed, the slotting tool 3 is lifted to be pulled out of the heat-sealed bag body, and then the cutting tool 6 moves along the width direction of the slot 11, so that the cutting of the bag body can be realized. After the bag body is cut, the two pressing blocks 4 are clamped, the pressing blocks 4 are driven to move horizontally through the horizontal driving piece 43, the pressing blocks leave the lower side of the bag body, and the bag body can fall off through rotation of the hot pressing roller 21.
The implementation principle of the manufacturing process of the single-material printing bag in the embodiment of the application is as follows: the static protective film who adopts can be at PE membrane conveying, printing stoving in-process, protects the PE membrane to avoid the PE membrane to receive the friction damage, in addition, after the printing of accomplishing the protective film, adopt static protective film and the common rolling of PE membrane, can prevent the friction damage PE membrane that produces between the adjacent two-layer PE membrane.
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: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. A manufacturing process of a single-material printing bag is characterized by comprising the following steps:
step one, preparing raw materials: selecting a PE film made of a single material as a raw material;
step two, material placement: placing the PE film in printing equipment;
step three, discharging materials: feeding the PE film, wherein the feeding tension is controlled to be 35-50N, and the feeding traction tension is 35-40N;
step four, printing: printing one side of the PE film along with the transmission of the PE film;
step five, drying: drying the printed PE film, wherein the drying temperature is controlled to be 35-40 ℃;
step six, rolling: winding the printed PE film, wherein the winding tension is controlled to be 50-60N, and the winding traction tension is controlled to be 40-70N;
step seven, bag making;
when the PE film is printed and unreeled, arranging an electrostatic protection film on one side of the non-printing surface of the PE film, and unreeling the electrostatic protection film synchronously, so that the electrostatic protection film is attached to one side of the non-printing surface of the PE film in an adsorption manner, the electrostatic protection film and the PE film are synchronously conveyed, and the electrostatic protection film and the PE film are jointly reeled after printing and drying are completed;
the bag making method comprises the following steps:
1. releasing the film, namely releasing the printed PE film, and stripping the static protection film from the surface of the PE film;
2. folding the film, namely folding the discharge end of the PE film in half according to the length of the actually formed bag body to form a folded film, and further enabling the folded film and the corresponding part of the PE film to form two films of the bag body;
3. heat sealing, namely heat sealing the two sides of the two films of the bag body to form a bag body with an opening at one side;
4. cutting, namely cutting the bag body part at the tail end of the PE film to complete bag making and forming of the bag body;
the bag making adopts bag making equipment, the bag making equipment comprises a material discharging platform (1), the middle part of the material discharging platform (1) is provided with a slot (11), both sides of the lower part of the material placing platform (1) corresponding to the slot (11) are rotatably connected with hot pressing rollers (21) along the length direction of the slot (11), heat sealing knives (5) capable of moving towards the direction that the two heat pressing rollers (21) approach each other are vertically arranged at the positions corresponding to the two ends of each heat pressing roller (21) below the discharging platform (1), an inserting knife (3) which can be inserted into the slot (11) downwards is vertically arranged on the upper side of the discharging platform (1), the lengths of the slotting tool (3) and the hot-pressing roller (21) are both smaller than the width of the PE film, and a pressing block (4) which can be abutted against the slotting cutter (3) and synchronously moves downwards along with the slotting cutter (3) is arranged below the slot (11) corresponding to the heat-sealing cutter (5).
2. The process of claim 1, wherein the step of making a bag comprises the steps of:
1. laminating, namely laminating the unprinted sides of the two printed PE films and simultaneously conveying the two PE films;
2. performing heat sealing, namely performing transverse heat sealing and longitudinal heat sealing along with the conveying process of the two mutually attached PE films to form a bag body;
3. and cutting, namely cutting waste edges on two sides of the bag body along with the conveying of the heat-sealed bag body, and cutting the heat-sealed part of each bag body close to the discharge end to form a bag body with three edges heat-sealed and one side open.
3. The process of claim 2, wherein the single material printed bag comprises: when in heat sealing, the temperature of the transverse sealing knife is 170-195 ℃, and the temperature of the longitudinal sealing knife is 230-140 ℃.
4. The process of claim 1, wherein the single material printed bag comprises: the side wall of the material placing platform (1) corresponding to the slot (11) is provided with a cutter (6) capable of moving along the width direction of the slot (11).
5. The manufacturing process of the single-material printing bag according to claim 4, wherein the pressing block (4) is provided with a clamping member (41) capable of clamping the PE film, the discharge platform (1) is provided with a vertical driving member (42) capable of driving the pressing block (4) to move along a vertical direction corresponding to the lower side of the pressing block (4), and the lower side of the discharge platform (1) is further provided with a horizontal driving member (43) capable of driving the vertical driving member (42) to move horizontally.
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| CN113199816A (en) | 2021-08-03 |
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Address after: No. 28-1, Kongquehe Fourth Road, Jimo District, Qingdao City, Shandong Province, 266200 Patentee after: Qingdao Haide Packaging Co.,Ltd. Address before: No.306, Wenchang Road, Licang District, Qingdao City, Shandong Province 266021 Patentee before: Qingdao Hyde Packaging Co.,Ltd. |
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