CN103043290B - Exhaust valve port bag and method for manufacturing same - Google Patents
Exhaust valve port bag and method for manufacturing same Download PDFInfo
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- CN103043290B CN103043290B CN201210582852.7A CN201210582852A CN103043290B CN 103043290 B CN103043290 B CN 103043290B CN 201210582852 A CN201210582852 A CN 201210582852A CN 103043290 B CN103043290 B CN 103043290B
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Abstract
The invention relates to an exhaust valve port bag and a method for manufacturing the same. The exhaust valve port bag is a packing bag and is used for accommodating powdery or granular solid materials and flexible articles. The technical scheme includes that the method comprises overlapping at least two layers of films with staggered pin holes and identical lengths; aligning and adhering edges of one sides of the films, adhering the other sides of the films together and oppositely folding adhesion seams of two sides of the films; respectively adhering upper and lower edges of the films; and adhering one sides of the films with the other sides of the films by n-shaped adhesion seams, and arranging a port between an upper transverse edge and an upper-side adhesion seam. The exhaust valve port bag and method solve technical problems of high product cost and complicated structure of a valve port and top and bottom of an existing valve port bag. Common perforating, adhering, edge folding and bag making machines are utilized, the method for manufacturing the exhaust valve port bag by means of perforating the pin holes of the films, adhering the two sides of the films, oppositely folding or bending the films, performing heat sealing for the n-shaped adhesion seams and performing heat sealing and heat cutting for the upper and lower edges of the films is implemented by common technologies, and technical problems of complicated technology for manufacturing the existing valve port bag, difficulty in realizing completely automatic processing and influence on the valve port bag processing efficiency and production cost are solved.
Description
Technical field
The present invention relates to packaging bag, is a kind of blow off valve pocket and preparation method thereof concretely.
Background technology
Valve bag has packaging efficiency, convenient transport, firmness is strong, breakage rate the is low feature of improving.Chinese utility model patent Granted publication CN2897851Y " Double-layer valve-port pack with exhaust from bottom " discloses upper bottom surface and bottom surface is evenly equipped with micropore, upper bottom surface and bottom surface are all with the layer that adds with uniform micro, add layer or welding bonding with upper bottom surface, bottom surface surrounding respectively, add the valve bag of the micropore of layer and the micropore mutual dislocation of upper bottom surface, bottom surface, the upper and lower bottom structure complexity of this valve bag, cost of product is high.Chinese utility model patent Granted publication CN 2631975Y " a kind of Polyethyene valve port bags " discloses the side of the inner bag and outer bag that are nested or front and has been provided with several pin holes of longitudinal arrangement, pin hole in interior outer bag is not at same position, be folded into upper bottom surface and the bottom surface of multi-layer multi-strip limit geometric configuration by the oval mouth in inner bag and outer bag two ends, upper bottom surface minor face is provided with a valve port, on upper bottom surface and bottom surface, be respectively provided with a shell fabric, the fabric of upper bottom surface and bottom surface is provided with the branding through high-temperature pressurizing welding, and branding is rectangle or Long Circle or the difform Polyethyene valve port bags of strip or block composition, on this valve bag, go to the bottom and valve mouth structure complexity, cost of product is high.Chinese invention patent Granted publication CN 1201923C " a kind of method for making of Polyethyene valve port bags " discloses the polyethylene inner/outer tube material with pin hole has been nested, make pin hole on inner/outer tube material not at same position, oval two layered cylinder material two ends mouth is folded into bottom surface on the geometric form of multi-layer multi-strip limit, load onto a valve port at upper bottom surface minor face, on upper bottom surface, stick on again a shell fabric, then respectively the bottom surface being enclosed within on cover die is carried out to the pressurization welding of disposable many limits with the upper bottom surface that is lined with mould by the high pressing mold after heating, thereby make the technology of double-deck exhaust Double bottom solid rectangle Polyethyene valve port bags, due to the complex structure of existing valve bag, so this manufacturing technology is with regard to corresponding complexity, be difficult to realize full automation processing, affect valve bag work efficiency and productive costs.The valve bag that has now a kind of EVA of selecting material to make, eva film fusing point is lower than glue furnacing temperature.Plasticating and when mixing, the refining glue batching of this EVA valve bag and its splendid attire can add rubber preparing device in the lump, and the even blend of valve bag melting and rubber does not affect the quality of rubber, alleviate workman's labour intensity, avoided dust from flying, still, existing EVA valve bag is single bag, can not exhaust, easy broken bag when pneumatic transmission tank bag and piling, thus can only splendid attire particle and sheet refining glue batching, and powdery refining glue batching is still used PP bag and paper bag packing.The valve port of this EVA valve bag needs artificial welding, also has complex structure, is difficult to realize full automation processing, affects the drawback of valve bag work efficiency and productive costs.
Summary of the invention
The present invention will solve valve port and the upper and lower bottom structure complexity of existing valve bag, cost of product is high and manufacturing technology is complicated, be difficult to realize full automation processing, affect the technical matters of valve bag work efficiency and productive costs, provide a kind of simple in structure, blow off valve pocket and manufacturing technology that cost of product is low are simple, easily full automation processing, work efficiency height and the low blow off valve pocket method for making of productive costs.
In order to solve above-mentioned technical matters, the technical scheme that the present invention takes is: a kind of blow off valve pocket, comprise at least two-layer film with pin hole, and described each layer film is overlapping, and the pin hole on adjacent films layer is staggered; Each layer film length is identical, alignment in the longitudinal direction, and at Width, each layer film justified margin is on one side bonded together and forms the sticky seam of edging, and each layer film another side is by being bonded together in conjunction with sticky seam; With each layer film of the sticky seam of edging with relative folding of the each layer film in conjunction with sticky seam, the sticky seam of edging covers in conjunction with sticky seam; The upper lower edge of film length direction is the sticky seam in bonding formation top and following sticky seam respectively; The sticky seam of ∏ shape is bonded together the one side on each layer film Width with another side, the sticky outside vertical edge stitching of ∏ shape covers the sticky seam of edging and stitches in conjunction with sticky; Space between the sticky seam in the upper horizontal edge of the sticky seam of ∏ shape and top is charging valve port.
Each layer film pin hole is staggered, bonding respectively at the upper lower edge of length direction, and the sticky seam of ∏ shape is bonded together the one side on each layer film Width with another side, form upper-lower seal, valve port side can splendid attire powder packaging bag.Pin hole is rounded, rhombus, oblong or square etc., and on film, rule or fitfull are arranged.The exhaust of blow off valve pocket entire body, the exhausting problem while having solved filling and piling, pollution and the waste of avoiding bag breakage to cause.Blow off valve pocket of the present invention simple in structure, cost of product is low; Valve port charging is convenient, and can utilize the pressure automatic sealing of air, charging.The outside vertical edge of the sticky seam of so-called ∏ shape refers to the vertical edge near valve port outside, and inner side vertical edge refers near the vertical edge in bag.Inner side vertical edge and the outside vertical edge longitudinally sticky seam that to be one side in thin-film width direction be bonded together with another side, when charging, carrying and piling, longitudinally sticky seam is weak link, easily cracking.Two vertical edges of the sticky seam of ∏ shape have increased longitudinally sticky seam intensity, can ensure charging, carrying and piling that exhaust blow off valve pocket is safe, are a kind of safe, economic technological means.Outside ∏ shape is glued seam and only had, compared with the sticky seam of " Γ " font of vertical edge, intensity is high, can ensure the safety of charging, carrying and piling; The sticky seam of ∏ shape with fall compared with the sticky seam of " Ш " font (horizontal edge at three above vertical edge), although can ensure the safety of charging, carrying and piling, the good economy performance of the sticky seam of processing ∏ shape falls in processing that " Ш " font is sticky to be stitched.
The lower air by-pass passage that horizontal direction connects is left in the bottom of the medial and lateral vertical edge of the sticky seam of ∏ shape.The medial and lateral vertical edge of the sticky seam of ∏ shape does not have bonding at lower air by-pass passage place.Lower air by-pass passage is communicated with in atmosphere and bag, and while making first charge, the Bas Discharged of bag inner bottom part is more unobstructed, has increased the safety of blow off valve pocket.
On the upper horizontal edge of the sticky seam of ∏ shape, there is the sticky air by-pass passage of sewing on of ∏ shape; There is air by-pass passage in the sticky seam of ∏ shape at the middle part of the inner side vertical edge of the sticky seam of ∏ shape.∏ shape is sticky is sewn on that ∏ shape is sticky sews on air by-pass passage place in air by-pass passage and the sticky seam of ∏ shape and do not have bonding.Be communicated with atmosphere in the sticky air by-pass passage of sewing on of the ∏ at valve port place shape, in the sticky seam of ∏ shape, air channel connection ∏ shape is sticky sews in air by-pass passage, lower air by-pass passage and bag, makes the Bas Discharged at middle part in when filling with substance bag more unobstructed, has increased the safety of blow off valve pocket.
The outside vertical edge of the sticky seam of ∏ shape overlaps with the position of the sticky seam of edging.Aspect intensity, the longitudinally sticky seam of blow off valve pocket, special outside vertical edge, is weak link, easily cracking.Outside vertical edge overlaps not only attractive in appearance with the sticky seam of edging, importantly Hot secures admittedly, has increased the intensity of sticky seam.
The upper horizontal edge of the sticky seam of ∏ shape is that circular arc is connected with outside vertical edge and inner side vertical edge.Circular arc connects attractive in appearance, and the intensity at valve port bottom place is high.
The inner of the upper horizontal edge of the sticky seam of ∏ shape is upturned.The upper horizontal edge of the sticky seam of ∏ shape and the point of connection of inner side vertical edge are higher than the upper horizontal edge of the sticky seam of ∏ shape and the point of connection of outside vertical edge, and the canned delivery pipe of being convenient to pot-type equipment injects.The charging door of traditional packaging bag is inside and outside to equate, valve port of the present invention is outer little in large, and when filling with substance air and material are little to the impact failure of blow off valve pocket.
The film fabric width of blow off valve pocket is equal, or unequal, or part is unequal.
Blow off valve pocket has at least the fabric width of thin film to be less than the fabric width of other layer film.The blow off valve pocket valve port place that has reduced some layer film fabric widths is constant with the blow off valve pocket valve port place number of plies that waits fabric width film to make, and has both ensured the intensity of blow off valve pocket, has saved again material.The different film of fabric width can be overlapping by any order.
Described film is EVA(ethylene-vinyl acetate copolymer) or RB810, RB820, RB830(thermoplastic synthetic rubber) film.EAV, RB810, RB820 and RB830 membrane waterproofing, protection against the tide.The fusing point of eva film is between 75-90 DEG C, in rubber rubber mixing technique, glue furnacing temperature is 100 DEG C of left and right, the blow off valve pocket that eva film is made drops into rubber preparing device with the refining glue batching of splendid attire, can, in melting under glue furnacing temperature and the even blend of rubber, not affect the quality of rubber; RB810, RB820 and RB830 are neoprene, fusing point is between 71-90 DEG C, the blow off valve pocket that RB810, RB820 or RB830 film are made drops into rubber preparing device with the refining glue batching of splendid attire, the even blend of melting and rubber under glue furnacing temperature, RB810, RB820 and RB830 can vulcanize at the temperature of the vulcanization of rubber; The heat of fusion of RB810, RB820 and RB830 material is the half of EVA material, adopt RB810, RB820 or RB830 blow off valve pocket can shorten the refining glue time, enhance productivity, stop to refine the risk that glue overlong time is decomposed some pharmaceutical chemicalss, be conducive to improve the quality of rubber; In rubber, add RB810, RB820 or RB830 material and can improve the glossiness of rubber, increase the elasticity of rubber, prevent the be full of cracks of rubber.EAV of the present invention, RB810, RB820 and RB830 blow off valve pocket are simple in structure, can splendid attire powder.The sack that common PE film is made, fusing point is at 110-135 DEG C, can not melting under glue furnacing temperature and blend rubber even, become impurity, have a strong impact on the quality of rubber.
On the film on blow off valve pocket surface with anti-skidding salient point.So that carry, deposit.Blow off valve pocket can be shades of colour, on film, can carry out printing of all kinds.
The method for making of above-mentioned blow off valve pocket, its step is as follows:
(1) with punching mechanical to the film hole of having an injection; By accomplish fluently pin hole divided thin film fabric width be rolled into large volume;
(2) a termination alignment of the each layer film length direction on large volume, one side alignment on Width, on the overlapping discharging frame that is placed on bonding machinery, the pin hole on adjacent films layer is staggered; The one side of aliging on Width is bonded together with bonding machinery, forms the sticky seam of edging, each layer film another side is bonded together to form in conjunction with sticky with bonding machinery and stitches;
(3) film after the sticky seam of bonding edging and the sticky seam of combination is placed on the discharging frame of flanging machinery, with flanging machinery first will be with the film in conjunction with sticky seam one side folding 180 ° or bending, again by relative the film with the sticky seam of edging 5 one sides folding 180 ° or bending, the sticky seam of edging covers in conjunction with sticky seam, the multilayer cylinder material that forms blow off valve pocket, multilayer cylinder material is rolled into the large volume of multilayer cylinder material;
(4) the large volume that is rolled into multilayer cylinder material, be put on the discharging frame of bag machinery, lower bolster is put into the sticky seam of edging and the cylinder material in conjunction with sticky seam below, with ∏ shape heat seal cutter will be with the film of the sticky seam of edging one side with being bonded together in conjunction with the film of sticky seam one side, form the sticky seam of ∏ shape, the sticky outside vertical edge stitching of ∏ shape covers the sticky seam of edging and stitches in conjunction with sticky; The cutting knife of bag machinery heat seal of two ends up and down to length direction by the bag length of setting, fervent, forms the sticky seam in top and following sticky seam, and the space that glue between seam the upper horizontal edge of the sticky seam of ∏ shape and top is charging valve port.Blow off valve pocket is made.
Because blow off valve pocket of the present invention is simple in structure, so its method for making is simple, easily full automation processing, work efficiency is high, and productive costs is low.Existing many punchings, bonding, flanging, bag machinery and common process technology are easy to automatically complete the making of blow off valve pocket of the present invention.For example, the acanthopore roller of punching mechanical, the RSB1000 of bonding machinery, the ZM800 of flanging machinery, ZM2000 film tuck machine, RQL series Bag Making Machine of bag machinery etc. is all applicable equipment.
The vertical edge position, outside of the sticky seam of ∏ shape of heat seal, bonding machine up overlaps with the position of the sticky seam of edging.
The bottom of the sticky seam of bag mechanical adhesion ∏ shape vertical edge reserves the gap of lower air by-pass passage.
Gapped on the upper horizontal edge of the sticky seam of bag mechanical adhesion ∏ shape, this gap forms the sticky air by-pass passage of sewing on of ∏ shape; The vertical edge middle part, inner side of the sticky seam of bag mechanical adhesion ∏ shape is gapped, and this gap forms air by-pass passage in the sticky seam of ∏ shape.
The upper horizontal edge of the sticky seam of bag mechanical adhesion ∏ shape is that circular arc is connected with outside vertical edge and inner side vertical edge.The upper horizontal edge of the sticky seam of ∏ shape is that arc transition is connected with two vertical edges.
The inner that bag closes the upper horizontal edge of the sticky seam of mechanical adhesion ∏ shape is upturned.The outer imperial palace of valve port of bonding formation is little.
Make in the film of valve bag, have at least the fabric width of thin film to be less than the fabric width of other film.The different film of fabric width can be overlapping by any order.
Advantage of the present invention is: blow off valve pocket simple in structure, and cost of product is low, and valve port charging is convenient, automatic sealing.Blow off valve pocket can splendid attire powder, entire body exhaust, the exhausting problem while having solved filling and piling.EAV, RB810, RB820 and RB830 blow off valve pocket can drop into rubber preparing device with the refining glue batching of splendid attire, with the even blend of rubber, particularly RB810, RB820 and RB830 can vulcanize at the temperature of the vulcanization of rubber, its heat of fusion is the half of EVA material, adopt RB810, RB820 or RB830 blow off valve pocket splendid attire refining glue batching can shorten the refining glue time, improve rubber production efficiency, increase glossiness, the elasticity of rubber, prevent rubber be full of cracks.Method for making of the present invention is simple, and many existing machineries and common process technology are easy to automatically complete the making of blow off valve pocket of the present invention, and work efficiency is high, and productive costs is low.
Brief description of the drawings
Fig. 1 is the structural representation of four embodiment of the present invention;
Fig. 2 is the A-A generalized section of Fig. 1;
Fig. 3 is the B-B generalized section of Fig. 1;
Fig. 4 is the C-C generalized section of Fig. 1;
Fig. 5 is the D-D generalized section of Fig. 1.
Detailed description of the invention
Accompanying drawings.
In Fig. 2-Fig. 5, clear for what show, the distance between film is expanded.
Embodiment 1, as figure, the blow off valve pocket of splendid attire refining rubber powder shape batching has double-layer films.On film, have the circular pin hole of Φ 1mm, pin hole line-spacing is 22mm, and row distance is 10mm.Double-layer films is overlapping, and pin hole is staggered.In accompanying drawing, do not draw pin hole.Film is EAV material, and wherein the content of VA is 10%, film thickness 0.10mm.Internal layer membrane 1 is identical with outer membrane 2 length, is all 620mm; The fabric width of internal layer membrane 1 is 970mm, than the many 60mm of the fabric width of outer membrane 2.The justified margin on internal layer membrane 1 and outer membrane 2 the right, is heat sealing at together, forms the sticky seam 5 of edging; The edge on outer membrane 2 left sides is heat sealing on internal layer membrane 1, forms in conjunction with sticky seam 6.The left side of internal layer membrane 1 is together with turning back 180 ° to the right in conjunction with sticky seam 6, and what the sticky seam 5 of edging on internal layer membrane 1, outer membrane 2 the right was relative turns back 180 ° left.The sticky seam 5 of edging covers in conjunction with gluing seam 6, and in the left side in conjunction with sticky seam 6, edging glues seam 5 and stitches 6 at a distance of 20mm in conjunction with sticky.The upper lower edge of film length direction respectively heat seal formation top glues seam 3 and glues and stitch 4 below.The sticky seam 7 of ∏ shape is bonded together the left side of the right of outer membrane 2 and internal layer membrane 1 and outer membrane 2 and internal layer membrane 1.The upper horizontal edge of the sticky seam 7 of ∏ shape is respectively that circular arc is connected with outside vertical edge and inner side vertical edge, and the inner of upper horizontal edge is upturned.Outside vertical edge upper extreme point is with sticky seam 4 is at a distance of 440mm below, and inner side vertical edge upper extreme point is with sticky seam 4 is at a distance of 450mm below, and outside vertical edge and inner side vertical edge are at a distance of 85mm.The right and the left side that in narration, relate to internal layer membrane 1 and outer membrane 2 refer to position relationship when their limit does not also have flanging.The outside vertical edge of the sticky seam 7 of ∏ shape overlaps with the sticky seam 5 of edging, and inner side vertical edge is on the left side of internal layer membrane 1; Space between the sticky seam 3 in the upper horizontal edge of the sticky seam 7 of ∏ shape and top is charging valve port 12.The vertical edge lower end of the sticky seam 7 of ∏ shape with below sticky stitch 4 between 45mm do not have bondingly, leave lower air by-pass passage 9.On the upper horizontal edge of the sticky seam 7 of ∏ shape, have the breach of 20mm not have bonding, form the sticky air by-pass passage 10 of sewing on of ∏ shape, the vertical edge middle part, inner side of the sticky seam 7 of ∏ shape uniformly at intervals the breach of three 50mm do not have bonding, air by-pass passage 11 in forming that three ∏ shapes are sticky and stitching.
Can be with anti-skidding salient point, so that carry, deposit on the surface film of blow off valve pocket of the present invention; Blow off valve pocket can be shades of colour, and printing of all kinds can be carried out in surface.
The method for making of the blow off valve pocket of the present embodiment splendid attire refining rubber powder shape batching:
(1) with DS90 punching porcupine roller to EAV(ethylene-vinyl acetate copolymer) internal layer membrane 1 of fabric width 970mm and the outer membrane 2 of fabric width 910mm beat respectively circular pin hole.The VA content of internal layer membrane 1 and outer membrane 2 is 10%, thickness 0.10mm.The circular pin hole of Φ 1mm, line-spacing is 22mm, row distance is 10mm.Internal layer membrane 1 and outer membrane 2 after acanthopore are rolled into large volume separately, pile up respectively.
(2) by the volume head end head alignment on a volume internal layer membrane 1 and volume outer membrane 2 length directions, the one side on Width, i.e. the right, alignment, below internal layer membrane 1 is placed on, above outer membrane 2 is placed on, pin hole on double-layer films is staggered, and overlapping is placed on discharging frame.Two volume films unreel simultaneously, with the runner type heat-fastening knife of runner rolling type hot seal machine to edge, one side heat seal of aliging on Width, form the sticky seam 5 of continuous heat seal edging, to the another side of double-layer films, it is the left side, heat seal, forms continuous heat seal in conjunction with sticky seam 6, together with in conjunction with sticky seam 6, outer membrane 2 another side edges being heat sealing at the another side of internal layer membrane 1.
Flanging machinery first folds back 180 ° by the internal layer membrane 1 with in conjunction with sticky seam 6 and the 180mm another side of outer membrane 2, again by backward relative folding 180 ° on one side of the 360mm of the internal layer membrane 1 with the sticky seam 5 of edging and outer membrane 2, the sticky seam 5 of edging covers in conjunction with gluing and stitches 6, and the sticky seam 5 of edging glues seam 6 at a distance of 20mm with combination.The multilayer cylinder material that forms blow off valve pocket is rolled into the large volume of multilayer cylinder material.
The present embodiment adopts bonding, flanging all-in-one to complete the sticky seam 5 of edging and in conjunction with the heat seal of sticky seam 6 and the flanging on film both sides.
(3) the large volume that is rolled into multilayer cylinder material, be put on the discharging frame of RQL800 Bag Making Machine, heat insulation silica gel plate is put into the sticky seam 5 of edging and the cylinder material in conjunction with sticky seam 6 belows, by the film with the sticky seam of edging 5 one sides with being bonded together in conjunction with the film of sticky seam 6 one sides, form the sticky seam 7 of ∏ shape with ∏ shape heat-fastening knife.The outside vertical edge of the sticky seam 7 of ∏ shape overlaps with the sticky seam 5 of edging, covers in conjunction with sticky seam 6.Outside vertical edge and the inner side vertical edge spacing 85mm of the sticky seam 7 of ∏ shape, the upper end of outside vertical edge is apart from sideline, the upper end 180mm of blow off valve pocket, the upper end of inner side vertical edge is apart from sideline, the upper end 170mm of blow off valve pocket, the upper horizontal edge of the sticky seam 7 of ∏ shape is connected by the circular arc of R10 and R5 respectively with outside vertical edge and inner side vertical edge, the middle part of upper horizontal edge has 20mm not bonding, reserve the sticky air by-pass passage 10 of sewing on of ∏ shape, on the vertical edge of inner side, be evenly equipped with the three each 50mm in place not bonding, reserve air by-pass passage 11 in the sticky seam of three ∏ shapes, the lower end of outside vertical edge and inner side vertical edge is apart from sideline, the upper end 575mm of blow off valve pocket, the lower end of outside vertical edge and inner side vertical edge is not bonding apart from sideline, the lower end 45mm of blow off valve pocket like this, reserve lower air by-pass passage 9.Both sides be in the middle of heat-sealing, be fervent Bag Making Machine hot knife from volume head end head every 620mm heat seal, earnestly, form the sticky seam 3 in top and below the upper horizontal edge of the sticky seam 7 of sticky seam 4, ∏ shape be the valve port 12 of feeding with the space between the sticky seam 3 in top.
Because blow off valve pocket structure of the present invention, processing technology are simple, so its method for making is very easy to, use common punching, bonding, flanging and bag machinery, adopt common process technology just can realize automation completely and process.
Embodiment 2 is that with the difference of embodiment 1 film of the blow off valve pocket of splendid attire refining rubber powder shape batching is thermoplastic synthetic rubber RB810 material film.Structure and the method for making of embodiment 2 blow off valve pockets are identical with embodiment 1, and both structural representations are also identical.
The blow off valve pocket of embodiment 3 and the difference of embodiment 1 are that the film of blow off valve pocket is PP material film.Structure and the method for making of embodiment 3 blow off valve pockets are identical with embodiment 1, and both structural representations are also identical.
The blow off valve pocket of embodiment 4 and the difference of embodiment 1 are that the film of blow off valve pocket is PE material film.Structure and the method for making of embodiment 4 blow off valve pockets are identical with embodiment 1, and both structural representations are also identical.
Claims (11)
1. a blow off valve pocket, comprises at least two-layer film with pin hole, it is characterized in that described each layer film is overlapping, and the pin hole on adjacent films layer is staggered; Each layer film length is identical, alignment in the longitudinal direction, and at Width, each layer film justified margin is on one side bonded together and forms the sticky seam of edging (5), and each layer film another side is by being bonded together in conjunction with sticky seam (6); Glue each layer film of seam (5) and relative the folding of each layer film of gluing seam (6) with combination with edging, sticky stitch (5) of edging cover sticky stitch (6) of combination; The upper lower edge of film length direction is the sticky seam in bonding formation top (3) and following sticky seam (4) respectively; Sticky stitch (7) of ∏ shape are bonded together the one side on each layer film Width with another side, the outside vertical edge of the sticky seam of ∏ shape (7) covers the sticky seam of edging (5) and the sticky seam of combination (6); Space between the sticky seam in the upper horizontal edge of the sticky seam of ∏ shape (7) and top (3) is charging valve port (12).
2. a kind of blow off valve pocket according to claim 1, is characterized in that the lower air by-pass passage (9) that horizontal direction connects is left in the bottom of the medial and lateral vertical edge of the sticky seam of ∏ shape (7).
3. a kind of blow off valve pocket according to claim 1 and 2, is characterized in that there is the sticky air by-pass passage (10) of sewing on of ∏ shape on the upper horizontal edge of the sticky seam of ∏ shape (7), and there is air by-pass passage (11) in the sticky seam of ∏ shape at the middle part of the inner side vertical edge of the sticky seam 7 of ∏ shape.
4. a kind of blow off valve pocket according to claim 1, is characterized in that the inner of the upper horizontal edge of the sticky seam of ∏ shape (7) is upturned.
5. a kind of blow off valve pocket according to claim 1, is characterized in that blow off valve pocket has at least the fabric width of thin film to be less than the fabric width of other layer film.
6. a kind of blow off valve pocket according to claim 1, is characterized in that described film is EVA(ethylene-vinyl acetate copolymer) or RB810, RB820, RB830 thermoplastic synthetic rubber film.
7. a kind of blow off valve pocket according to claim 1, is characterized in that on the film on blow off valve pocket surface with anti-skidding salient point.
8. according to the method for making of any one blow off valve pocket described in claim 1-7, its step is as follows:
(1) with punching mechanical to the film hole of having an injection; By accomplish fluently pin hole divided thin film fabric width be rolled into large volume;
(2) a termination alignment of the each layer film length direction on large volume, one side alignment on Width, on the overlapping discharging frame that is placed on bonding machinery, the pin hole on adjacent films layer is staggered; The one side of aliging on Width is bonded together with bonding machinery, forms the sticky seam of edging (5), each layer film another side is bonded together and forms in conjunction with sticky stitch (6) with bonding machinery;
(3) film after the sticky seam of bonding edging (5) and the sticky seam of combination (6) is placed on the discharging frame of flanging machinery, with flanging machinery first will be with the film in conjunction with sticky seam (6) one sides folding 180 ° or bending, again will be with the film of the sticky seam of edging (5) one sides relative folding 180 ° or bending, the sticky seam of edging (5) covers in conjunction with sticky seam (6), the multilayer cylinder material that forms blow off valve pocket, multilayer cylinder material is rolled into the large volume of multilayer cylinder material;
(4) the large volume that is rolled into multilayer cylinder material, be put on the discharging frame of bag machinery, lower bolster is put into the sticky seam of edging (5) and the cylinder material in conjunction with sticky seam (6) below, with ∏ shape heat seal cutter will be with the film of the sticky seam of edging (5) one sides with being bonded together in conjunction with the film of sticky seam (6) one sides, form sticky stitch (7) of ∏ shape, the outside vertical edge of the sticky seam of ∏ shape (7) covers the sticky seam of edging (5) and the sticky seam of combination (6); The cutting knife of bag machinery heat seal of two ends up and down to length direction by the bag length of setting, fervent, forms the sticky seam in top (3) and glues below seam (4), and the sticky space of stitching between (3) in the upper horizontal edge of the sticky seam of ∏ shape (7) and top is charging valve port (12),
Blow off valve pocket is made.
9. the method for making of a kind of blow off valve pocket according to claim 8, is characterized in that the bottom of the sticky seam of bag mechanical adhesion ∏ shape (7) vertical edge reserves the gap of lower air by-pass passage (9).
10. the method for making of a kind of blow off valve pocket according to claim 8, is characterized in that bag mechanical adhesion ∏ shape is glued on the upper horizontal edge that stitches (7) gapped, and this gap forms the sticky air by-pass passage (10) of sewing on of ∏ shape; The vertical edge middle part, inner side of the sticky seam of bag mechanical adhesion ∏ shape (7) is gapped, and this gap forms air by-pass passage (11) in the sticky seam of ∏ shape.
The method for making of 11. a kind of blow off valve pockets according to claim 8, is characterized in that making in the film of blow off valve pocket, has at least the fabric width of thin film to be less than the fabric width of other film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210582852.7A CN103043290B (en) | 2012-12-28 | 2012-12-28 | Exhaust valve port bag and method for manufacturing same |
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| CN201210582852.7A CN103043290B (en) | 2012-12-28 | 2012-12-28 | Exhaust valve port bag and method for manufacturing same |
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| CN103043290A CN103043290A (en) | 2013-04-17 |
| CN103043290B true CN103043290B (en) | 2014-11-26 |
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| CN110667183B (en) * | 2019-10-18 | 2021-11-30 | 温州国强机械有限公司 | Folding device of full-automatic production line of valve bag |
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| JP5189572B2 (en) * | 2009-08-25 | 2013-04-24 | シコー株式会社 | Double packaging bag |
| CN102114932A (en) * | 2009-12-30 | 2011-07-06 | 王子颖 | One-way exhaust valve bag |
| US20110173932A1 (en) * | 2010-01-19 | 2011-07-21 | John David M | Biodegradable Bag and Method of Use Thereof |
| CN102328774A (en) * | 2010-07-15 | 2012-01-25 | 王子颖 | Block bottom valve packing bag containing thermoplastic plastics and manufacturing method thereof |
| JP2012131542A (en) * | 2010-12-22 | 2012-07-12 | Eiwa Tokushu Kako Kk | Bag with exhaust valve |
| CN202244507U (en) * | 2011-09-19 | 2012-05-30 | 龚玉明 | Hot-press automatic valve bag |
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