CN114523729A - Processing technology of self-cleaning medicine packaging bag - Google Patents
Processing technology of self-cleaning medicine packaging bag Download PDFInfo
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- CN114523729A CN114523729A CN202111640859.5A CN202111640859A CN114523729A CN 114523729 A CN114523729 A CN 114523729A CN 202111640859 A CN202111640859 A CN 202111640859A CN 114523729 A CN114523729 A CN 114523729A
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- cutting
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- 238000004140 cleaning Methods 0.000 title claims abstract description 31
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 21
- 239000003814 drug Substances 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 62
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000004026 adhesive bonding Methods 0.000 claims abstract 5
- 238000007731 hot pressing Methods 0.000 claims description 42
- 238000007493 shaping process Methods 0.000 claims description 16
- 238000010030 laminating Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000004513 sizing Methods 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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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
- B31B70/20—Cutting sheets or blanks
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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
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/04—Feeding sheets or blanks
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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
- B31B70/142—Cutting, e.g. perforating, punching, slitting or trimming using presses or dies
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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
- B31B70/148—Cutting-out portions from the sides of webs or sheets
-
- 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
-
- 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
- B31B70/76—Moistening; Drying; Cooling; Heating
Landscapes
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Abstract
The invention discloses a processing technology of a self-cleaning bag for medicine packaging, which comprises a processing production system, wherein the processing production system comprises a first unwinding roller, a second unwinding roller and a processing device, the processing device comprises a workbench and a top plate, supporting rods are vertically fixed at four corners of the top of the workbench, the top ends of the supporting rods are fixedly connected to the bottom of the top plate, a heat sealing mechanism, a cooling and sizing mechanism and a cutting mechanism are sequentially arranged between the workbench and the top plate along the moving direction of a film, and the first unwinding roller and the second unwinding roller are arranged at the rear end of the processing device. The invention combines the gluing, the heat sealing and the cutting into a whole, has small occupied area and less equipment investment, can heat seal and cut a plurality of self-cleaning bags at one time, and improves the production efficiency.
Description
Technical Field
The invention belongs to the technical field of self-cleaning bag processing, and particularly relates to a processing technology of a self-cleaning bag for medicine packaging.
Background
The medical packaging self-cleaning bag can be used for packaging medical appliance products, can be used for sterilizing and aseptic operation, can protect the products before and after sterilization, and can maintain the packaging system in an aseptic environment in the system within a certain period after sterilization. In the processing process of the self-cleaning bag, the processes of attaching, heat sealing and cutting are required, the traditional method is to sequentially send the films into the attaching equipment, the heat sealing equipment and the cutting equipment for processing respectively, the operation is complex, the production efficiency is low, the occupied area of a production line is large, and the cost is high.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a processing technology of a self-cleaning bag for medicine packaging, which integrates the functions of laminating, heat sealing and cutting, has small occupied area and less equipment investment, can heat seal and cut a plurality of self-cleaning bags at one time, and improves the production efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a processing technology of medicine packing self-purification bag, including processing production system, processing production system includes first unreeling roller, second unreels roller and processingequipment, processingequipment includes workstation and roof, the equal vertical fixation in four edges at workstation top has branch, the top fixed connection of branch in the bottom of roof, heat-seal mechanism, cooling shaping mechanism and cutting mechanism have set gradually along film moving direction between workstation and the roof, first unreeling roller and second unreel the roller and all set up in processingequipment's rear end.
Preferably, aforementioned heat-seal mechanism includes hot pressboard under first last hot pressboard, first hot pressboard, a plurality of second and a plurality of second, and the top of first last hot pressboard and the bottom of first hot pressboard all connect first drive actuating cylinder through first telescopic link down, and two first drive actuating cylinders are fixed in the bottom of roof and the top of workstation respectively.
Preferably, the plurality of second upper hot press plates are arranged in front of the first upper hot press plate and are uniformly arranged from left to right, and the plurality of second lower hot press plates are arranged in front of the first lower hot press plate and are uniformly arranged from left to right.
Preferably, the top of hot pressboard and the bottom of hot pressboard all drive actuating cylinder through the second telescopic link connection second on the aforesaid second, and two seconds drive actuating cylinder sliding connection respectively in the bottom of roof and the top of workstation to the removal of hot pressboard and second hot pressboard is gone up to the drive second respectively.
Preferably, the rear end of the heat sealing mechanism is further provided with a laminating mechanism, and the laminating mechanism comprises an upper laminating roller and a lower laminating roller.
Preferably, aforementioned cooling shaping mechanism includes chill roll and chill roll down, and the inside of going up chill roll and chill roll down all is provided with the cold water chamber, and the one end in cold water chamber is provided with the water filling port, through cooling to the banding position, can avoid the turn-up because of high temperature arouses.
Preferably, aforementioned cutting mechanism includes cutting bed, first cutting knife and a plurality of second cutting knife, and the cutting bed sets up on the workstation, and the top of first cutting knife is connected the third through the third telescopic link and is driven actuating cylinder, and the third is driven actuating cylinder and is fixed in the bottom of roof.
Preferably, aforementioned a plurality of second cutting knives are located the front end of first cutting knife, and by left to right align to grid, and the top of second cutting knife passes through the fourth telescopic link and connects fourth drive cylinder, and fourth drive cylinder sliding connection is in the bottom of roof to the removal about driving the second cutting knife.
Preferably, a traction mechanism is arranged between the cooling and shaping mechanism and the cutting mechanism, and the traction mechanism comprises an upper traction roller and a lower traction roller.
A processing technology of a self-cleaning bag for medicine packaging comprises the following specific steps:
s1, feeding: respectively installing the sterilized first film roll and the sterilized second film roll on a first unwinding roller and a second unwinding roller, and sequentially enabling the front ends of the first film and the second film to pass through a laminating mechanism, a heat sealing mechanism, a cooling and shaping mechanism and a traction mechanism;
s2, bonding: the first film and the second film are attached together after passing through the upper attaching roller and the lower attaching roller to form a film body;
s3, heat sealing: the positions of a plurality of second upper hot pressing plates and second lower hot pressing plates are adjusted according to the width of the self-cleaning bag, the film body moves into the heat sealing mechanism, the first upper hot pressing plate and the first lower hot pressing plate move oppositely to perform first heat sealing on the film body to form a bottom edge, the plurality of second upper hot pressing plates and the second lower hot pressing plate move oppositely simultaneously to perform second heat sealing on the film body to form a plurality of side edges;
s4, cooling and shaping: after the heat sealing is finished, the film body enters between the upper cooling roller and the lower cooling roller, and the bottom edge and the side edge of the heat sealing are cooled and shaped;
s5, cutting: the film body after the cooling design moves to the cutting table on, and first cutting knife moves down, cuts the position of base rear side, and a plurality of second cutting knives cut the side intermediate position respectively, can obtain a plurality of self-cleaning bags.
The invention has the advantages that: the processing device for the self-cleaning bags for the medicine packaging is simple in structure and easy to operate, integrates the attaching, the heat sealing and the cutting, occupies a small area, is low in equipment investment, can heat seal and cut a plurality of self-cleaning bags at one time, and improves the production efficiency; through the position of hot pressboard, second hot pressboard and second cutting knife under the adjustment second, can obtain the self-cleaning bag of different width, satisfy multiple needs.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a second upper hot press plate and a second lower hot press plate according to the present invention;
FIG. 3 is a top view of the membrane body of the present invention.
The meaning of the reference symbols in the figures: 1. the film cutting machine comprises a first unwinding roller, 2, a second unwinding roller, 4, a workbench, 5, a top plate, 6, a film body, 6.1, a bottom edge, 6.2, a side edge, 7, a first upper hot pressing plate, 8, a first lower hot pressing plate, 9, a second upper hot pressing plate, 10, a second lower hot pressing plate, 11, a first driving cylinder, 12, a second driving cylinder, 13, an upper laminating roller, 14, a lower laminating roller, 15, an upper cooling roller, 16, a lower cooling roller, 17, a cutting table, 18, a first cutting knife, 19, a second cutting knife, 20, a third driving cylinder, 21, a fourth driving cylinder, 22, an upper traction roller, 23 and a lower traction roller.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
Referring to fig. 1-3, the processing technology of the self-cleaning medicine packaging bag comprises a processing production system, the processing production system comprises a first unwinding roller 1, a second unwinding roller 2 and a processing device, the processing device comprises a workbench 4 and a top plate 5, supporting rods are vertically fixed at four corners of the top of the workbench 4, the top ends of the supporting rods are fixedly connected to the bottom of the top plate 5, a heat sealing mechanism, a cooling and shaping mechanism and a cutting mechanism are sequentially arranged between the workbench 4 and the top plate 5 along the moving direction, and the first unwinding roller 1 and the second unwinding roller 2 are arranged at the rear end of the processing device.
The heat sealing mechanism comprises a first upper hot pressing plate 7, a first lower hot pressing plate 8, a plurality of second upper hot pressing plates 9 and a plurality of second lower hot pressing plates 10, the top end of the first upper hot pressing plate 7 and the bottom end of the first lower hot pressing plate 8 are connected through a first telescopic rod to form a first driving cylinder 11, and the two first driving cylinders 11 are fixed at the bottom of the top plate 5 and the top of the workbench 4 respectively. The second upper hot pressing plates 9 are arranged in front of the first upper hot pressing plates 7 and are uniformly arranged from left to right, and the second lower hot pressing plates 10 are arranged in front of the first lower hot pressing plates 8 and are uniformly arranged from left to right. The top of hot pressboard 9 and the bottom of hot pressboard 10 all pass through the second telescopic link connection second on the second and drive actuating cylinder 12, and two second drive actuating cylinders 12 sliding connection respectively are in the bottom of roof 5 and the top of workstation 4 to drive respectively on the second and remove about hot pressboard 9 and the second hot pressboard 10, slider and guide rail can be selected to sliding connection wherein, because of belonging to the technical scheme who uses commonly among the prior art, so do not do specific explanation.
The rear end of the heat sealing mechanism is also provided with a laminating mechanism which comprises an upper laminating roller 13 and a lower laminating roller 14.
The cooling shaping mechanism comprises an upper cooling roller 15 and a lower cooling roller 16, a cold water cavity is formed in the upper cooling roller 15 and the lower cooling roller 16, and a water injection port is formed in one end of the cold water cavity.
Cutting mechanism includes cutting bed 17, first cutting knife 18 and a plurality of second cutting knife 19, and cutting bed 17 sets up on workstation 4, and the top of first cutting knife 18 is passed through the third telescopic link and is connected the third and drive actuating cylinder 20, and the third drives actuating cylinder 20 and is fixed in the bottom of roof 5. A plurality of second cutting knife 19 are located the front end of first cutting knife 18, and from left to right align to grid, and fourth drive cylinder 21 is connected through the fourth telescopic link on the top of second cutting knife 19, and fourth drive cylinder 21 sliding connection is in the bottom of roof 5 to control about driving second cutting knife 19, slider and guide rail are optionally used to sliding connection mode wherein, because of belonging to the technical scheme who uses commonly among the prior art, the event does not do not specifically describe.
A traction mechanism is arranged between the cooling and shaping mechanism and the cutting mechanism, and comprises an upper traction roller 22 and a lower traction roller 23.
A processing technology of a self-cleaning bag for medicine packaging comprises the following specific steps:
s1, feeding: respectively installing the sterilized first roll and the sterilized second roll on a first unwinding roller 1 and a second unwinding roller 2, and sequentially enabling the front ends of the first roll and the second roll to pass through a laminating mechanism, a heat sealing mechanism, a cooling and shaping mechanism and a traction mechanism;
s2, bonding: the first and the second are jointed together after passing through an upper jointing roller 13 and a lower jointing roller 14 to form a film body 6;
s3, heat sealing: the positions of a plurality of second upper hot pressing plates 9 and second lower hot pressing plates 10 are adjusted according to the width of the self-cleaning bag, the film body 6 moves into the heat sealing mechanism, the first upper hot pressing plate 7 and the first lower hot pressing plate 8 move oppositely to perform first heat sealing on the film body 6 to form a bottom edge 6.1, the plurality of second upper hot pressing plates 9 and the second lower hot pressing plates 10 move oppositely simultaneously to perform second heat sealing on the film body 6 to form a plurality of side edges 6.2;
s4, cooling and shaping: after the heat sealing is finished, the film body 6 enters between an upper cooling roller 15 and a lower cooling roller 16, and the bottom edge 6.1 and the side edge 6.2 which are subjected to heat sealing are cooled and shaped;
s5, cutting: the film body 6 after cooling and sizing moves to the cutting table 17, the first cutting knife 18 moves downwards to cut the position of the rear side of the bottom edge 6.1, the second cutting knives 19 cut the middle positions of the side edges 6.2 respectively, the cutting positions are shown in figure 3, the dotted lines in the figure are cutting lines, and a plurality of self-cleaning bags can be obtained after cutting is completed.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (10)
1. The utility model provides a processing technology of medicine packing self-purification bag, includes processing production system, its characterized in that, processing production system includes that first unreeling roller (1), second unreel roller (2) and processingequipment, processingequipment includes workstation (4) and roof (5), the equal vertical fixation in four edges at workstation (4) top has branch, the top fixed connection of branch is in the bottom of roof (5), heat-seal mechanism, cooling setting mechanism and cutting mechanism have set gradually along film moving direction between workstation (4) and roof (5), first unreeling roller (1) and second unreel roller (2) and all set up in processingequipment's rear end.
2. The processing technology of the self-cleaning bag for medicine packaging according to claim 1, wherein the heat sealing mechanism comprises a first upper hot pressing plate (7), a first lower hot pressing plate (8), a plurality of second upper hot pressing plates (9) and a plurality of second lower hot pressing plates (10), the top end of the first upper hot pressing plate (7) and the bottom end of the first lower hot pressing plate (8) are connected with a first driving cylinder (11) through a first telescopic rod, and the two first driving cylinders (11) are respectively fixed at the bottom of the top plate (5) and the top of the workbench (4).
3. The processing technology of the self-cleaning bag for medicine packaging according to claim 3, wherein a plurality of the second upper hot press plates (9) are arranged in front of the first upper hot press plate (7) and are uniformly arranged from left to right, and a plurality of the second lower hot press plates (10) are arranged in front of the first lower hot press plate (8) and are uniformly arranged from left to right.
4. The processing technology of the self-cleaning bag for packaging the medicine according to claim 4, wherein the top end of the second upper hot pressing plate (9) and the bottom end of the second lower hot pressing plate (10) are both connected with second driving cylinders (12) through second telescopic rods, and the two second driving cylinders (12) are respectively connected to the bottom of the top plate (5) and the top of the workbench (4) in a sliding manner so as to respectively drive the second upper hot pressing plate (9) and the second lower hot pressing plate (10) to move left and right.
5. The processing technology of the self-cleaning bag for medicine packaging according to claim 2, wherein a gluing mechanism is further arranged at the rear end of the heat sealing mechanism, and the gluing mechanism comprises an upper gluing roller (13) and a lower gluing roller (14).
6. The processing technology of the self-cleaning bag for medicine packaging according to claim 1, wherein the cooling and shaping mechanism comprises an upper cooling roller (15) and a lower cooling roller (16), wherein cold water cavities are respectively arranged inside the upper cooling roller (15) and the lower cooling roller (16), and one end of each cold water cavity is provided with a water injection port.
7. The processing technology of the self-cleaning bag for medicine packaging according to claim 1, wherein the cutting mechanism comprises a cutting table (17), a first cutting knife (18) and a plurality of second cutting knives (19), the cutting table (17) is arranged on the workbench (4), the top end of the first cutting knife (18) is connected with a third driving cylinder (20) through a third telescopic rod, and the third driving cylinder (20) is fixed at the bottom of the top plate (5).
8. The processing technology of the self-cleaning bag for medicine packaging according to claim 7, wherein the plurality of second cutting knives (19) are positioned at the front end of the first cutting knife (18) and are uniformly arranged from left to right, the top ends of the second cutting knives (19) are connected with a fourth driving cylinder (21) through a fourth telescopic rod, and the fourth driving cylinder (21) is slidably connected to the bottom of the top plate (5) so as to drive the second cutting knives (19) to move left and right.
9. The process for manufacturing the self-cleaning bag for packaging medicine according to claim 1, wherein a traction mechanism is arranged between the cooling and shaping mechanism and the cutting mechanism, and the traction mechanism comprises an upper traction roller (22) and a lower traction roller (23).
10. The processing technology of the self-cleaning bag for medicine packaging according to any one of claims 1 to 9, comprising the following specific steps:
s1, feeding: respectively installing the sterilized first film roll and the sterilized second film roll on a first unwinding roller (1) and a second unwinding roller (2), and sequentially enabling the front ends of the first film and the second film to pass through a laminating mechanism, a heat sealing mechanism, a cooling and shaping mechanism and a traction mechanism;
s2, bonding: the first film and the second film are jointed together after passing through an upper jointing roller (13) and a lower jointing roller (14) to form a film body (6);
s3, heat sealing: the positions of a plurality of second upper hot pressing plates (9) and second lower hot pressing plates (10) are adjusted according to the width of a required self-cleaning bag, the film body (6) moves to a heat sealing mechanism, the first upper hot pressing plate (7) and the first lower hot pressing plate (8) move oppositely to perform first heat sealing on the film body (6) to form a bottom edge (6.1), the plurality of second upper hot pressing plates (9) and the second lower hot pressing plates (10) move oppositely simultaneously to perform second heat sealing on the body to form a plurality of side edges (6.2);
s4, cooling and shaping: after the heat sealing is finished, the film body (6) enters between an upper cooling roller (15) and a lower cooling roller (16) to carry out cooling and shaping on the heat-sealed bottom edge (6.1) and the side edge (6.2);
s5, cutting: the film body (6) after cooling and shaping moves to a cutting table (17), a first cutting knife (18) moves downwards to cut the position of the rear side of the bottom edge (6.1), and a plurality of second cutting knives (19) respectively cut the middle position of the side edge (6.2), so that a plurality of self-cleaning bags can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640859.5A CN114523729A (en) | 2021-12-30 | 2021-12-30 | Processing technology of self-cleaning medicine packaging bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640859.5A CN114523729A (en) | 2021-12-30 | 2021-12-30 | Processing technology of self-cleaning medicine packaging bag |
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| CN114523729A true CN114523729A (en) | 2022-05-24 |
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| CN202111640859.5A Pending CN114523729A (en) | 2021-12-30 | 2021-12-30 | Processing technology of self-cleaning medicine packaging bag |
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