CN117383057A - Reverse inner opening sealing structure of valve port bag and manufacturing process thereof - Google Patents
Reverse inner opening sealing structure of valve port bag and manufacturing process thereof Download PDFInfo
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- CN117383057A CN117383057A CN202311258854.5A CN202311258854A CN117383057A CN 117383057 A CN117383057 A CN 117383057A CN 202311258854 A CN202311258854 A CN 202311258854A CN 117383057 A CN117383057 A CN 117383057A
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- 238000007789 sealing Methods 0.000 title claims abstract description 179
- 230000002441 reversible effect Effects 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 137
- 238000003860 storage Methods 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 23
- 230000000670 limiting effect Effects 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 51
- 239000000123 paper Substances 0.000 description 50
- 239000011229 interlayer Substances 0.000 description 21
- 230000004888 barrier function Effects 0.000 description 18
- 239000010408 film Substances 0.000 description 18
- 238000005429 filling process Methods 0.000 description 5
- 239000004831 Hot glue Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/14—Valve bags, i.e. with valves for filling
-
- 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
-
- 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
- B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/04—Applying separate sealing or securing members, e.g. clips
- B65B51/06—Applying adhesive tape
- B65B51/062—Applying adhesive tape to the mouths of bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B7/00—Closing containers or receptacles after filling
- B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
- B65B7/025—Closing valve bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Abstract
The application relates to the field of valve bags, in particular to a reverse inner port sealing structure of a valve bag and a manufacturing process thereof, wherein the reverse inner port sealing structure comprises a bag body top sealing part for sealing the top of the valve bag; the valve port piece is arranged at the top sealing part of the bag body and is used for filling powder; the expansion piece is arranged on the inner side of the bag body top sealing part, an expansion part is arranged on one side of the expansion piece, which faces the valve port piece, and the expansion part is used for expanding and sealing the powder inlet end of the valve port piece. The valve port powder leakage prevention device has the effects of improving the valve port powder leakage and improving the sealing performance of the valve port bag.
Description
Technical Field
The application relates to the field of valve bags, in particular to a reverse inner port sealing structure of a valve bag and a manufacturing process thereof.
Background
The valve bag, commonly called as a bottom pasting bag, is an international popular packaging bag, is fed from the top or bottom valve port, adopts special filling equipment, is filled with materials and then is packaged into a square body, and is orderly and attractive in stacking, and belongs to an environment-friendly bag.
In the related art, a feed inlet is formed in the upper bottom of the valve bag body, the valve bag body is formed by folding an inner film layer and a paper outer layer, reinforcing layers are arranged in the upper bottom and the lower bottom of the valve bag body, the feed cuffs are arranged on the reinforcing layers in the upper bottom, and a hot melt adhesive ring is arranged on the inner side of the outer port of the feed inlet.
However, the related art described above has the following problems: when the valve pocket of the related art is used for filling powder, a pipeline for filling the powder needs to be inserted into the valve pocket from a feed inlet, and when the filling is completed, the pipeline is pulled out for sealing, but the powder is easy to adhere to the inner wall of the feed inlet in the pulling-out process due to the fact that the powder is easy to adhere to the inner wall of the feed inlet, so that the hot melt adhesive ring cannot be well sealed due to the influence of the powder in the packaging process, and further the conditions of cracking of the feed inlet, powder leakage and the like are caused in the storage process.
Disclosure of Invention
In order to improve the condition of valve port powder leakage and improve the sealing property of a valve port bag, the application provides a reverse inner port sealing structure of a valve port bag and a manufacturing process thereof.
In a first aspect, the present application provides a valve bag reverse inner port sealing structure, which adopts the following technical scheme:
the reverse inner port sealing structure of the valve port bag comprises a bag body top sealing part for sealing the top of the valve port bag; the valve port piece is arranged at the top sealing part of the bag body and is used for filling powder; the expansion piece is arranged on the inner side of the bag body top sealing part, an expansion part is arranged on one side of the expansion piece, which faces the valve port piece, and the expansion part is used for expanding and sealing the powder inlet end of the valve port piece.
By adopting the technical scheme, in the powder filling process, the powder inlet end of the valve port piece can be expanded and blocked by utilizing the expansion of the expansion part of the expansion piece, so that the powder inlet end of the valve port piece can be blocked when powder filling is completed, the sealing tightness of a valve pocket is improved, and the problem of powder leakage at the valve port position is solved.
Preferably, the expansion piece is an inner paper layer, the expansion part is a powder storage part, the powder storage part is arranged at one side of the inner paper layer facing the valve port piece, and the powder storage part is used for storing powder.
Through adopting above-mentioned technical scheme, in the in-process of filling powder, hide the powder portion and can collect and deposit partial powder to make to hide powder portion inflation, to filling the powder and accomplish the time to fill the powder and carry out the shutoff to the inlet end of valve port spare, realized that the inflation portion is used for the effect of the inlet end of inflation shutoff valve port spare.
Preferably, the inner opening paper layer is provided with an inner fold line, and the inner opening paper layer is folded along the inner fold line to form a powder storage part.
By adopting the technical scheme, in the process of manufacturing the valve pocket, the inner port paper layer is folded in half along the inner folding line to form the powder storage part, so that the effect of the powder storage part for storing powder is realized.
Preferably, the length of the inner paper layer along the width direction of the top sealing part of the bag body is longer than the width of the top sealing part of the bag body.
Through adopting above-mentioned technical scheme, the setting of interior mouth ply can cooperate the bag body top seal portion to fold in the valve port bag manufacturing process to improve the setting stability of interior mouth ply, be favorable to forming and hide the powder portion.
Preferably, the powder storage part is provided with a limited powder position, and the limited powder position is used for limiting the powder to be separated from the powder storage part.
Through adopting above-mentioned technical scheme, limit the setting of powder position can restrict the powder and break away from and hide powder portion to can improve and hide the stability that powder portion is used for hiding the powder, and then make and hide the expansion that powder portion can be stable in the in-process of filling the powder.
Preferably, the powder storage part is provided with a folding line, and the powder storage part is folded along the folding line to form a powder limiting position.
By adopting the technical scheme, in the process of manufacturing the valve pocket, the powder limiting position is formed by folding along the folding line, so that the limiting effect of the powder limiting position on the powder separating from the powder storage part can be realized.
In a second aspect, the present application provides a process for manufacturing a reverse inner port sealing structure of a valve bag, which adopts the following technical scheme:
a process for manufacturing a reverse inner port sealing structure of a valve port bag comprises the following steps,
step one: preparing raw material paper;
step two: the raw material paper is coiled and bonded to form a valve port bag body with a rectangular section;
step three: the top of the valve port bag body is provided with a bag body top sealing part, the bag body top sealing part is provided with a first sealing part, a second sealing part, a third sealing part and a fourth sealing part, and the first sealing part and the second sealing part are relatively bent and fixed;
step four: the valve port piece and the expansion piece are respectively fixed at the positions of the first sealing part and the second sealing part;
step five: and relatively bending and fixing the third sealing part and the fourth sealing part.
Preferably, in the fourth step, the valve port member is fixedly disposed outside the first sealing portion, and then the expansion member is fixedly disposed inside the second sealing portion, and the expansion portion of the expansion member is partially disposed at the valve port member in a stacked manner.
Preferably, in the fifth step, the fourth sealing portion is folded and fixed to the first sealing portion and the second sealing portion, the expansion portion is fixed to the fourth sealing portion, the third sealing portion is then lap-fixed to the fourth sealing portion, the third sealing portion is fixed to the fourth sealing portion, the first sealing portion and the second sealing portion, and the expansion portion is fixed to the third sealing portion.
Preferably, in the fifth step, an edge sealing layer is fixed on the top of the top sealing portion of the bag body.
In summary, the present application includes at least one of the following beneficial technical effects:
1. in the powder filling process, the powder inlet end of the valve port piece can be inflated and blocked by utilizing the inflation of the inflation part of the inflation piece, so that the powder inlet end of the valve port piece can be blocked when powder filling is completed, the sealing tightness of a valve pocket is improved, and the problem of powder leakage at the valve port position is solved;
2. the setting of the powder limiting position can limit the powder to be separated from the powder storage part, so that the stability of the powder storage part for storing the powder can be improved, and the powder storage part can be stably expanded in the powder filling process;
3. the valve port piece and the expansion piece are fixedly arranged by utilizing the folding of the first sealing part, the second sealing part, the third sealing part and the fourth sealing part, so that the structural arrangement of the top sealing part of the bag body is realized, the powder inlet end of the valve port piece can be plugged when powder filling is completed, the sealing tightness of a valve pocket is improved, and the problem of powder leakage at the valve port position is solved.
Drawings
Fig. 1 is a state diagram of the bag body top seal in the present application after opening.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic structural view of another embodiment of the powder storing portion of the present embodiment.
Fig. 4 is an enlarged view of the portion B in fig. 1.
Fig. 5 is a view for showing a specific layered structure in the third seal portion and the fourth seal portion in the present application.
Fig. 6 is a state diagram of the top seal of the bag body of the present application.
Reference numerals illustrate: 1. a top sealing part of the bag body; 2. a valve port member; 21. lining paper layer; 22. a thin film layer; 23. an outer fold line; 3. an expansion member; 31. an expansion section; 32. an inner fold line; 33. limiting the powder position; 34. turning over the folding line; 4. a first sealing part; 5. a second sealing part; 6. a third seal portion; 7. a fourth sealing part; 8. a first paper barrier; 9. a second paper barrier; 10. a third paper barrier; 11. a thin film interlayer; 12. and (5) edge sealing layer.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
In a first aspect, embodiments of the present application disclose a reverse internal port seal structure for a valve bag. Referring to fig. 1, a reverse inner port sealing structure of a valve bag includes a bag body top sealing part 1 for closing the top of the valve bag; the valve port piece 2 is arranged at the top of the bag body, and the valve port piece 2 is used for filling powder; the expansion piece 3, the expansion piece 3 sets up in the inboard of bag body top seal portion 1, and the expansion piece 3 is provided with expansion portion 31 towards one side of valve port spare 2, and expansion portion 31 is used for the powder end of advancing of inflation shutoff valve port spare 2.
Referring to fig. 1, the bag top seal 1 includes a first seal 4, a second seal 5, a third seal 6, and a fourth seal 7. The first sealing portion 4 is disposed opposite to the second sealing portion 5, and the third sealing portion 6 is disposed opposite to the fourth sealing portion 7. The valve port member 2 is glued between the first sealing portion 4, the third sealing portion 6 and the fourth sealing portion 7.
Referring to fig. 1 and 2, the expansion member 3 is an inner paper layer, and the expansion portion 31 is correspondingly provided as a powder storing portion. The powder storage part is arranged at one side of the inner paper layer facing the valve port piece 2 and is used for storing powder. Specifically, the inner paper layer is fixed on the inner side of the second sealing part 5 by glue. The inner paper ply is provided with an inner fold line 32, and the inner paper ply is folded in half along the inner fold line 32 to form a powder storage part.
In order to improve the setting stability of the valve port paper layer, the setting length of the inner port paper layer along the width direction of the bag body top sealing part 1 is larger than the width setting of the bag body top sealing part 1. Specifically, the inner paper layer extends into the third sealing part 6 and the fourth sealing part 7 along the two ends of the width direction of the top sealing part 1 of the bag body. In the process of manufacturing, through stretching into the setting of third sealing portion 6 and fourth sealing respectively with the both ends of interior mouth ply, can carry out folding together at the in-process that third sealing portion 6 and fourth sealing portion 7 are folding fixed with the both ends of interior mouth ply to can improve the stability that interior mouth ply set up, can cooperate the powder portion of hiding of infolding simultaneously, when forming the powder portion of hiding, improve the setting stability of powder portion of hiding.
Referring to fig. 1 and 3, in order to improve the stability of the powder storage portion for storing powder, optionally, in this embodiment, the powder storage portion is provided with a limited powder position 33, and the limited powder position 33 is used to limit the powder from escaping from the powder storage portion. Specifically, the powder storage part is provided with a fold line 34, and the powder storage part is folded along the fold line 34 to form a powder limiting position 33.
In the powder filling process, the inventor finds that the powder is pumped into the valve pocket by adopting high-speed air pressure during powder filling, and in the process that the air flow drives the powder to enter the valve pocket, the air flow drives part of the powder to flow into the powder storage part for storage, so that the effect that the powder storage part expands through powder storage is realized. However, because the air current can flow fast at the internal well of bag in the in-process of filling powder, consequently get into in fact and hide powder in the middle of the powder portion and still can run off under the drive of air current, cause hiding the not high problem of retention of powder in the powder portion to produce, and then lead to hiding the not good problem of shutoff effect of powder portion to valve port spare 2 at last easily to can intercept the air current that flows fast through the limit powder position 33 that sets up, thereby in the in-process that fills powder utilizes limit powder position 33 quick with partial powder flow in the middle of hiding the powder portion, improve and hide the powder effect of powder portion.
Optionally, the length of the powder limiting position 33 is half of the length of the powder storage part, and in the powder filling process, the powder can be partially intercepted in advance by using the powder limiting position 33 with the length being half of the powder storage part, and the condition that the powder storage part is used for sealing the valve port piece 2 when the powder storage part does not fill the powder in the bag body is avoided because the powder storage part finishes the powder storage action in advance.
Referring to fig. 4, the valve port member 2 includes an inner liner paper layer 21 and a film layer 22, the film layer 22 is sandwiched between the inner liner paper layer 21 and the bag body top seal portion 1, and the length of the film layer 22 along the length direction of the bag body top seal portion 1 is greater than the length of the inner liner paper layer 21 along the length direction of the bag body top seal portion 1.
Further, the inner liner paper layer 21 is provided with an outer fold line 23, and the inner liner paper layer 21 is folded in half along the outer fold line 23 to form a protective portion. The film layer 22 is folded outwards along the fold line 23 of the inner liner paper layer 21. The thickness of the lining paper layer 21 at the valve port position can be increased by inwards folding the lining paper layer 21 and the film layer 22, so that the service life of the lining paper layer 21 can be prolonged, and the film layer 22 is folded and protected.
Referring to fig. 5, the top sealing portion 1 of the bag body comprises a first paper interlayer 8, a second paper interlayer 9, a third paper interlayer 10 and a film interlayer 11 made of a PE film, wherein the first paper interlayer 8, the film interlayer 11, the second paper interlayer 9 and the third paper interlayer 10 are sequentially arranged from inside to outside, so that the overall strength of the bag body can be improved, and the bag body is not easy to damage in the use or transportation process. Meanwhile, due to the water-proof property of the film interlayer 11, the two sides in and out of the bag body can be isolated, so that the inside of the bag body is not easy to invade water vapor to cause powder damage.
Referring to fig. 5, the first paper barrier 8, the second paper barrier 9, and the third paper barrier 10 in the third seal portion 6 are arranged in a stepwise incremental offset manner, and the film barrier 11 in the third seal portion 6 is aligned with and overlapped with the second paper barrier 9. Correspondingly, the first paper interlayer 8 and the film interlayer 11 in the fourth sealing part 7 are arranged in a stepwise decreasing staggered manner, and the film interlayer 11, the second paper interlayer 9 and the third paper interlayer 10 in the fourth sealing part 7 are aligned and overlapped.
Further, the extension section extends from the third paper interlayer 10 in the third sealing part 6, and when the third sealing part 6 is folded and overlapped with the fourth sealing part 7, the extension section is adhered to the third paper interlayer 10 in the fourth sealing part 7, so that the adhesion stability between the third sealing part 6 and the fourth sealing part 7 can be further enhanced, and the sealing stability of the top sealing part 1 of the bag body is improved.
Referring to fig. 6, in order to improve the overall stability of the bag body top seal 1, the top of the bag body top seal 1 is fixedly provided with a sealing layer 12, and the sealing layer 12 is used for covering the top of the bag body top seal 1, so that the structure of the bag body top seal 1 can be protected, and the overall structural stability of the bag body top seal 1 is improved.
In a second aspect, embodiments of the present application disclose a process for manufacturing a reverse internal port seal structure for a valve bag,
step one: preparing raw material paper;
first paper barrier layer 8, second paper barrier layer 9, third paper barrier layer 10 and film barrier layer 11 are prepared respectively, film barrier layer 11 is coated outside first paper barrier layer 8, second paper barrier layer 9 is coated outside film barrier layer 11, and third paper barrier layer 10 is coated outside second paper barrier layer 9.
Step two: the raw material paper is coiled and bonded to form a valve port bag body with a rectangular section;
the first paper interlayer 8, the second paper interlayer 9, the third paper interlayer 10 and the film interlayer 11 are wound, adhered and fixed by glue.
Step three: the top of the valve pocket body is provided with a pocket body top sealing part 1, the pocket body top sealing part 1 is provided with a first sealing part 4, a second sealing part 5, a third sealing part 6 and a fourth sealing part 7, and the first sealing part 4 and the second sealing part 5 are relatively bent and fixed;
step four: the valve port member 2 and the expansion member 3 are fixed at the positions of the first sealing part 4 and the second sealing part respectively;
in the fourth step, the valve port member 2 is fixedly disposed outside the first sealing portion 4, and then the expansion member 3 is fixedly disposed inside the second sealing portion 5, and the expansion portion 31 of the expansion member 3 is partially overlapped with the valve port member 2.
Step five: the third sealing part 6 and the fourth sealing part 7 are bent and fixed relatively.
In the fifth step, the fourth sealing portion 7 is folded and fixed to the first sealing portion 4 and the second sealing portion 5, the expansion portion 31 is fixed to the fourth sealing portion 7, the third sealing portion 6 is fixed to the fourth sealing portion 7 by being overlapped with each other, the third sealing portion 6 is fixed to the fourth sealing portion 7, the first sealing portion 4 and the second sealing portion 5, and the expansion portion 31 is fixed to the third sealing portion 6.
In step five, the edge seal layer 12 is fixed on the top of the bag body top seal 1. Optionally, in this embodiment, the edge sealing layer 12 is a white kraft layer, which not only can seal the top of the top sealing portion 1 of the bag body integrally, but also can further improve the tightness of the top sealing portion 1 of the bag body and ensure the printing effect.
First, the first sealing part 4 and the second sealing part 5 are folded towards opposite directions; then the valve port piece 2 is stuck to the outer side of the first sealing part 4, the inner port paper layer is stuck and fixed to the inner side of the second sealing part 5, and the two ends of the valve port piece 2 are flattened and then respectively stuck to the inner sides of the third sealing part 6 and the fourth sealing part 7; and finally, folding the third sealing part 6 and the fourth sealing part 7 towards opposite directions, wherein the two ends of the third sealing part 6 and the fourth sealing part 7 are adhered and fixed with the corresponding first sealing part 4 and second sealing part 5, and the end part of the third sealing part 6 is adhered and fixed after being lapped on the fourth sealing part 7 so as to seal the top of the bag body. Meanwhile, the two ends of the valve port piece 2 are lapped and stuck along with the folding of the third sealing part 6 and the fourth sealing part 7 so as to fill powder into the pipeline.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The utility model provides a reverse internal orifice seal structure of valve port bag which characterized in that: comprises a bag body top sealing part (1) for sealing the top of the valve bag; the valve port piece (2) is arranged on the bag body top sealing part (1), and the valve port piece (2) is used for filling powder; the expansion piece (3), the expansion piece (3) sets up the inboard at bag body top seal portion (1), just expansion piece (3) orientation one side of valve port spare (2) is provided with expansion portion (31), expansion portion (31) are used for the inflation shutoff the powder end that advances of valve port spare (2).
2. The inverted internal port seal for a valve bag according to claim 1, wherein: the expansion piece (3) is an inner paper layer, the expansion part (31) is a powder storage part, the powder storage part is arranged on one side of the inner paper layer facing the valve port piece (2), and the powder storage part is used for storing powder.
3. The inverted internal port seal of a valve bag according to claim 2, wherein: the inner opening paper layer is provided with an inner fold line (32), and the inner opening paper layer is folded along the inner fold line (32) to form a powder storage part.
4. The inverted internal port seal of a valve bag according to claim 3, wherein: the length of the inner port paper layer along the width direction of the bag body top sealing part (1) is greater than the width of the bag body top sealing part (1).
5. The inverted internal port seal of a valve bag according to claim 2, wherein: the powder storage part is provided with a limited powder position (33), and the powder limiting position (33) is used for limiting powder to be separated from the powder storage part.
6. The inverted internal port seal of a valve bag according to claim 5, wherein: the powder storage part is provided with a folding line (34), and the powder storage part is folded along the folding line (34) to form a powder limiting position (33).
7. A process for manufacturing a reverse inner port sealing structure of a valve bag, which is applied to the reverse inner port sealing structure of the valve bag in any one of claims 1 to 6, and is characterized in that: the method comprises the following steps:
step one: preparing raw material paper;
step two: the raw material paper is coiled and bonded to form a valve port bag body with a rectangular section;
step three: the top of the valve port bag body is provided with a bag body top sealing part (1), the bag body top sealing part (1) is provided with a first sealing part (4), a second sealing part (5), a third sealing part (6) and a fourth sealing part (7), and the first sealing part (4) and the second sealing part (5) are relatively bent and fixed;
step four: the valve port piece (2) and the expansion piece (3) are respectively fixed at the positions of the first sealing part (4) and the second sealing part;
step five: and bending and fixing the third sealing part (6) and the fourth sealing part (7) relatively.
8. The process for manufacturing the reverse inner port sealing structure of the valve bag according to claim 7, wherein the process comprises the following steps: in the fourth step, the valve port member (2) is fixedly arranged at the outer side of the first sealing part (4), then the expansion member (3) is fixedly arranged at the inner side of the second sealing part (5), and the expansion part (31) of the expansion member (3) is partially overlapped at the valve port member (2).
9. The process for manufacturing the reverse inner port sealing structure of the valve bag according to claim 7, wherein the process comprises the following steps: in the fifth step, the fourth sealing part (7) is folded and fixed with the first sealing part (4) and the second sealing part (5), the expansion part (31) is fixed with the fourth sealing part (7), then the third sealing part (6) is lapped and fixed on the fourth sealing part (7), the third sealing part (6) is fixed with the fourth sealing part (7), the first sealing part (4) and the second sealing part (5), and the expansion part (31) is fixed with the third sealing part (6).
10. The process for manufacturing the reverse inner port sealing structure of the valve bag according to claim 7, wherein the process comprises the following steps: in the fifth step, a sealing layer (12) is fixed on the top of the bag body top sealing part (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311258854.5A CN117383057A (en) | 2023-09-27 | 2023-09-27 | Reverse inner opening sealing structure of valve port bag and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311258854.5A CN117383057A (en) | 2023-09-27 | 2023-09-27 | Reverse inner opening sealing structure of valve port bag and manufacturing process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117383057A true CN117383057A (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311258854.5A Pending CN117383057A (en) | 2023-09-27 | 2023-09-27 | Reverse inner opening sealing structure of valve port bag and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117383057A (en) |
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2023
- 2023-09-27 CN CN202311258854.5A patent/CN117383057A/en active Pending
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