CN109648916B - Processing method of fresh frozen product packaging bag - Google Patents

Processing method of fresh frozen product packaging bag Download PDF

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Publication number
CN109648916B
CN109648916B CN201811558981.6A CN201811558981A CN109648916B CN 109648916 B CN109648916 B CN 109648916B CN 201811558981 A CN201811558981 A CN 201811558981A CN 109648916 B CN109648916 B CN 109648916B
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China
Prior art keywords
heat sealing
unit
sealing
heat
transverse
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CN201811558981.6A
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CN109648916A (en
Inventor
胡佐林
彭伟
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Chongqing Dingsheng Printing Co Ltd
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Chongqing Dingsheng Printing Co Ltd
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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
    • B31B70/10—Feeding or positioning 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
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents

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  • Containers And Plastic Fillers For Packaging (AREA)
  • Package Closures (AREA)

Abstract

The invention relates to the field of packaging bag manufacturing processes, and particularly discloses a processing method of a fresh frozen product packaging bag, which comprises the following steps: (a) unwinding a film; (b) placing a connecting belt: placing a connecting belt on the lower film, wherein the connecting belt is released when the connecting belt moves upwards through a placing unit with a reciprocating function, and the length of the connecting belt is greater than the width of the lower film; (c) attaching the upper film and the lower film: the upper film entering the conveying roller is attached to the lower film; (d) transversely heat-sealing the packaging bag; (e) longitudinally heat-sealing the packaging bag; (f) and (5) cold-pressing and shaping the packaging bag, cutting and collecting the packaging bag. The scheme adds the connecting band to the packaging bag through the method, thereby solving the problem that the fresh food packaging bag is worn in the transportation process in the prior art.

Description

Processing method of fresh frozen product packaging bag
Technical Field
The invention relates to the field of packaging bag manufacturing processes, in particular to a processing method of a fresh frozen product packaging bag.
Background
When fresh frozen products are packaged, in order to prolong the preservation time, four-side sealing bags (as shown in fig. 1) with two transverse sealing strips and two longitudinal sealing strips and good sealing performance are generally adopted for packaging, when the four-side sealing bags are formed, for the convenience of subsequent food loading, only one transverse sealing strip and two longitudinal sealing strips are sealed, and after the food loading is finished, the remaining transverse sealing strip is sealed.
The frozen article of giving birth to the bright goods is accomplishing the packing after, need to pack the good food package bag and put into the freezer and freeze fresh-keeping, the whole very hard of freezing packing, and because of the meat as giving birth to the bright food is at the volume, all inequality in shape, make shape and size after every wrapping bag freezes all inequality, in the transportation, often go on jolting the road surface because of the transport vechicle, make the transport vechicle vibrations violent, because there is not fixed on the transport vechicle between the adjacent freezing wrapping bag, and constantly produce relative motion, because the packing is whole very hard, friction between the adjacent packing aggravates, light then causes the wearing and tearing of wrapping bag, then cause the direct damage of wrapping bag, seriously influence the save of giving birth to the bright food.
In the process of processing and producing the packaging bags in the prior art, the problem of collision and abrasion among the packaging bags caused by the use of subsequent packaging bags can not be generally considered.
Disclosure of Invention
The invention aims to provide a processing method of a fresh and frozen product packaging bag, which is used for solving the problem that the fresh food packaging bag is worn in the transportation process in the prior art.
In order to achieve the above object, the basic scheme of the invention is as follows:
the processing method of the fresh frozen product packaging bag comprises the following steps:
(a) film unwinding: installing a first film roller of an upper film on a first unwinding roller and installing a second film roller of a lower film on a second unwinding roller;
(b) placing a connecting belt: after the lower film in the step (a) enters the conveying roller through the first guide roller, placing a connecting belt on the upper surface of the lower film, wherein the connecting belt is released when the connecting belt moves upwards through a placing unit with a reciprocating function, and the length of the connecting belt is greater than the width of the lower film;
(c) attaching the upper film and the lower film: the upper film enters the conveying roller through the second guide roller, and the upper film entering the conveying roller is attached to the lower film;
(d) transversely heat-sealing the packaging bag: the transverse heat sealing unit with the reciprocating function is close to the upper film and the lower film which are jointed in the step (c) and carries out transverse heat sealing on the upper film and the lower film to form a transverse seal strip of the packaging bag, the heat sealing time during the transverse heat sealing is 0.5-1.5s, the heat sealing pressure is 0.18MPa-0.25MPa, the heat sealing temperature is 110-130 ℃, and the heat sealing pressure is the pressure between the upper heat sealing plate and the lower heat sealing plate of the transverse heat sealing unit;
(e) longitudinal heat sealing of the packaging bag: the packaging bag after the step (d) is conveyed to a longitudinal heat sealing unit with a reciprocating function along with a conveying roller, longitudinal heat sealing is carried out to form a longitudinal sealing strip of the packaging bag, the heat sealing time between an upper heat sealing plate and a lower heat sealing plate of the longitudinal heat sealing unit is 0.5-1.5s, the heat sealing pressure is 0.18MPa-0.25MPa, and the heat sealing temperature is 110-;
(f) the wrapping bag is colded pressing stereotyped, is cut and the wrapping bag is collected: flattening the packaging bags subjected to the step (e) under the action of flattening rollers, enabling the packaging bags to enter a cooling unit for cooling and shaping under the action of a traction roller, cutting the packaging bags subjected to cooling and shaping into single packaging bags in a cutting unit, and finally collecting the single packaging bags in a collecting unit.
Compare the beneficial effect in prior art:
firstly, the processing method of the invention is adopted, so that the formed packaging bags are provided with the connecting bands, and further, the frozen fresh frozen product packaging bags can be mutually bound and connected through the connecting bands to form a whole, thereby reducing the relative movement of the adjacent frozen fresh frozen product packaging bags in the transportation process, and further avoiding the abrasion among the fresh frozen product packaging bags.
Secondly, the packaging bag processed by the method provided by the invention is provided with the connecting band, so that a person can grasp the connecting band to lift the packaging bag when carrying the fresh and frozen product packaging bag, and the condition that the hand is injured by freezing when the person directly holds the fresh and frozen product packaging bag is avoided.
Thirdly, the connecting belt is connected with the upper film and the lower film of the packaging bag into a whole through transverse heat sealing and longitudinal heat sealing, so that the connecting strength of the connecting belt and the packaging bag is enhanced, and meanwhile, the air tightness of the packaging bag is not influenced.
Further, the method also comprises the step of preliminary cooling the transverse seal arranged between the step (d) and the step (e): and (d) after the transverse sealing unit completes the heat sealing of the transverse sealing strip, ejecting gas by the transverse sealing unit, and preliminarily cooling the transverse sealing strip in the step (d) by the ejected gas.
The heat-seal forming method has the advantages that the heat-seal formed transverse seal strip is initially cooled, so that on one hand, the deformation condition of the transverse seal strip caused by the fact that the transverse seal strip is not cooled and loses the support of a heat-seal plate is avoided; on the other hand, the transverse heat-sealing unit automatically sprays gas when being far away from the packaging bag, so that the mechanical energy of the vertical reciprocating movement of the transverse heat-sealing unit can be utilized, and the utilization rate of the energy is improved.
Further, the method also comprises the step of preliminarily cooling the longitudinal seal arranged between the step (e) and the step (f): and (e) after the longitudinal heat sealing unit completes the heat sealing of the longitudinal sealing strip, the longitudinal heat sealing unit sprays gas, and the sprayed gas preliminarily cools the longitudinal sealing strip in the step (e).
The vertical sealing strip cooling device has the beneficial effects that the vertical sealing strip formed by heat sealing is preliminarily cooled, so that the condition of package bag deformation caused by the fact that the vertical sealing strip is not cooled and loses the support of the heat sealing plate is avoided.
Further, a sealing cylinder is connected between the placing unit and the transverse heat sealing unit in the steps (b) to (d), a first piston is arranged on the placing unit, a second piston is arranged on the transverse heat sealing unit, and the first piston and the second piston are respectively connected to two bottoms of the sealing cylinder in a sliding mode.
The transverse heat-sealing unit and the placing unit are respectively connected to the two bottoms of the sealing cylinder in a sliding mode through the first piston and the second piston, so that the first piston, the second piston and the sealing cylinder form a closed containing cavity, when the transverse heat-sealing unit moves downwards to further perform transverse heat sealing on the upper film and the lower film of the previous packaging bag, the placing unit moves upwards, and meanwhile in the process of moving upwards, the connecting belt placed on the placing unit is discharged, and the discharged connecting belt falls onto the lower film of the next packaging bag under the action of gravity; the transverse heat-sealing unit completes one-time forming of a transverse seal for the previous packaging bag, and the placing unit puts down a connecting belt for the next packaging bag; on one hand, the rhythm of transverse heat sealing and connecting belt placing is kept consistent; on the other hand, each packaging bag is also guaranteed to have a connecting belt.
Further, a connecting rod is fixedly connected between the transverse heat sealing unit and the longitudinal heat sealing unit in the steps (d) to (e), and the connecting rod enables the heat sealing plate of the transverse heat sealing unit and the longitudinal heat sealing unit to keep synchronous up and down movement.
The synchronous motion of the transverse heat-sealing unit and the longitudinal heat-sealing unit is realized through the connecting rod, so that the transverse heat-sealing unit can form a transverse sealing strip on the next packaging bag when the longitudinal sealing strip of the previous packaging bag is manufactured, the synchronism of the placing of the connecting belt, the transverse heat-sealing and the longitudinal heat-sealing beats in the packaging bag generating process is ensured, the beat control can be conveniently carried out according to the time used in the synchronization in the factory production, the generation efficiency is favorably improved, and the labor cost is maximally utilized.
Further, the connecting band in step (b) comprises an upper connecting band and a lower connecting band which are adhered, and the upper connecting band and the lower connecting band are adhered to each other at the middle section.
Has the advantages that: the connecting belt is an upper connecting belt and a lower connecting belt which are mutually bonded, so that when the packaging bags are mutually connected and fixed, the upper connecting belt and the lower connecting belt are mutually connected and bound with the connecting belt of another packaging bag as a whole; when the packaging bag needs to be opened, the upper connecting belt and the lower connecting belt are manually pulled in opposite directions, so that the upper film and the lower film of the packaging bag can be separated, the purpose of opening the packaging bag without other auxiliary tools is achieved, and the packaging bag can be conveniently opened at any time and any place.
Further, the connecting belt in the step (b) is made of PE, and the upper film and the lower film are PE films.
Has the advantages that: the material of connecting band is the same with the material of wrapping bag, is favorable to the heat-seal shaping of connecting band and upper and lower film, and the solution of connecting band and upper and lower film is connected the nature better for the existence of connecting band does not influence the quality behind the horizontal heat-seal unit heat-seal.
Drawings
FIG. 1 is a top view of a prior art four-sided envelope;
FIG. 2 is a schematic front view of a processing mechanism according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of a portion of FIG. 2;
FIG. 4 is an enlarged view of a portion B of FIG. 2;
FIG. 5 is a top view of the construction of the block of FIG. 4;
FIG. 6 is a top view of a formed package according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a second unreeling roller 1, a first guide roller 2, a first unreeling roller 3, a second guide roller 4, a conveying roller 5, a transverse heat sealing unit 6, a longitudinal heat sealing unit 7, a flattening roller 8, a cooling unit 9, a traction roller 10, a slitting unit 11, a collecting unit 12, an upper film 13, a lower film 14, a placing unit 15, a piston rod 16, a first piston 17, a connecting belt 18, an upper connecting belt 181, a lower connecting belt 182, a long baffle 19, a short baffle 20, a supporting block 21, a moving rod 22, a heat sealing cylinder 23, a heat sealing plate 24, a one-way air inlet valve 34, a blocking block 25, a connecting rod 26, a second piston 27, a sealing cylinder 28, a sealed containing cavity 29, a pressure spring 30, a pressure plate 31, a transverse sealing strip 32 and.
The processing method of the fresh and frozen product packaging bag needs to use a processing mechanism as shown in figures 2 to 4, the processing mechanism sequentially comprises a second unwinding roller 1, a first guiding roller 2, a first unwinding roller 3, a second guiding roller 4, a conveying roller 5, a transverse heat-sealing unit 6, a longitudinal heat-sealing unit 7, a flattening roller 8, a cooling unit 9, a traction roller 10, a slitting unit 11 and a collecting unit 12 which are connected onto a rack from left to right, the second unwinding roller 1, the first unwinding roller 3, the conveying roller 5 and the flattening roller 8 have linear speeds with the same size and direction, a power supply starting switch for controlling the second unwinding roller 1, the first unwinding roller 3, the conveying roller 5 and the flattening roller 8 to rotate is connected in series, and all rollers with power can be started or stopped simultaneously in the bag manufacturing process.
With reference to fig. 2 and 3, a placing unit 15 is arranged between the first guide roller 2 and the first unreeling roller 3, the placing unit 15 is located above the lower film 14, the placing unit 15 includes a piston rod 16 and a first piston 17, the piston rod 16 is sleeved with a plurality of connecting bands 18, the connecting bands 18 are structurally shown in fig. 6, the connecting bands 18 include upper connecting bands 181 and lower connecting bands 182 which are adhered to each other, the middle sections of the upper connecting bands 181 and the lower connecting bands 182 are adhered to each other, circular holes are formed in the adhering sections of the upper connecting bands 181 and the lower connecting bands 182, the connecting bands 18 are sleeved on the piston rod 16 through the circular holes, the lowest end of the piston rod 16 is hinged with a short baffle 20, the piston rod 16 is sleeved with a plurality of connecting bands 18 and supporting blocks 21, the connecting bands 18 and the supporting blocks 21 sleeved on; the piston rod 16 is hinged with a long baffle 19 and a short baffle 20 in the height direction, the two hinged shafts are sleeved with torsion springs, the rotating radius of the long baffle 19 is larger than that of the short baffle 20, the long baffle 19 is positioned above the short baffle 20, the connecting belt 18 at the lowest part is positioned above the short baffle 20, and the connecting belt 18 at the next lower part is positioned above the long baffle 19.
With reference to fig. 2 and 4, each of the transverse heat-sealing unit 6 and the longitudinal heat-sealing unit 7 includes a moving rod 22, a heat-sealing cylinder 23 and a heat-sealing plate 24, which are symmetrical in vertical structure, the heat-sealing plate 24 is slidably connected in the heat-sealing cylinder 23, a closed chamber is formed between the heat-sealing plate 24 and the heat-sealing cylinder 23, and a one-way air inlet valve 34 is arranged at the upper part of the heat-sealing cylinder 23; the heat sealing plate 24 is fixedly connected with the moving rod 22, the moving rod 22 penetrates out of the heat sealing cylinder 23, a plurality of step holes are formed in the heat sealing plate 24, the blocking blocks 25 are connected in the step holes in a sliding mode, the lower surfaces of the blocking blocks 25 can be parallel to the lower surface of the heat sealing plate 24, and the structure of the blocking blocks 25 is shown in fig. 4 and 5; a connecting rod 26 is fixedly connected between the moving rod 22 of the transverse heat-sealing unit 6 and the moving rod 22 of the longitudinal heat-sealing unit 7, and the moving rod 22 of the transverse heat-sealing unit 6 is driven by a linear motor to reciprocate up and down; the second piston 27 penetrates through the moving rod 22 at the upper part in the transverse heat-sealing unit 6.
A sealing cylinder 28 is connected between the placing unit 15 and the transverse heat-sealing unit 6, a first piston 17 and a second piston 27 are respectively connected in two bottoms of the sealing cylinder 28 in a sliding mode, a sealed containing cavity 29 is formed between the first piston 17 and the second piston 27, a pressure spring 30 is sleeved on a piston rod 16 of the placing unit 15, the top end of the pressure spring 30 is fixedly connected to the bottom of the sealing cylinder 28, and a pressure plate 31 is arranged between the bottom end of the pressure spring 30 and the uppermost connecting belt 18.
The connecting belt is made of PE materials, and the upper film and the lower film are PE films.
The specific processing method comprises the following steps:
(a) film unwinding: installing a first film roller with a packaging bag upper film 13 on a first unwinding roller 3, installing a second film roller with a packaging bag lower film 14 on a second unwinding roller 1, wherein the first film roller synchronously rotates along with the first unwinding roller 3, and the second film roller synchronously rotates along with the second unwinding roller 1;
(b) placing the connecting belt 18: referring to fig. 2 and 3, after the lower film 14 in step (a) enters the conveying roller 5 through the first guide roller 2, the linear motor drives the moving rod 22 of the transverse heat sealing unit 6 to move downward, the second piston 27 moves downward together, in the downward movement process, the first piston 17 is driven to move upward through the closed accommodating cavity 29, the piston rod 16 fixedly connected with the first piston 17 moves upward, and as the connecting band 18 and the supporting block 21 sleeved on the piston rod 16 are abutted by the pressure spring 30 and the pressure plate 31, when the piston rod 16 moves upward, the short baffle 20 and the long baffle 19 are pressed by the connecting band 18 and the supporting block 21 to rotate, and when the short baffle 20 rotates 90 degrees, the connecting band 18 at the lowest position loses support, and then falls onto the upper surface of the lower film 14 under the action of gravity;
since the length of the connecting band 18 is greater than the width of the lower film 14, the connecting band 18 is supported by the lower film 14 after falling, and the supporting block 21 falling together with the lowermost connecting band 18 does not fall on the lower film 14 because it exceeds the width of the lower film 14, and the supporting block 21 is collected and recycled manually after falling; after the connecting band 18 and the supporting block 21 at the lowest part fall down, the short baffle 20 is restored to the horizontal position under the action of the torsion spring; furthermore, as the piston rod 16 moves upwards continuously, the long baffle 19 rotates continuously until the long baffle rotates 90 degrees, the connecting belt 18 and the supporting block 21 above the long baffle 19 fall onto the short baffle 20 under the action of gravity, and the connecting belt 18 and the supporting block 21 which are overlapped above are supported by the short baffle 20;
because one side of the supporting plate close to the piston rod 16 is an inclined surface, when the linear motor drives the moving rod 22 of the transverse heat-sealing unit 6 to move upwards, the piston rod 16 moves downwards, the long baffle plate 19 has a force for returning to the horizontal position under the action of the torsion spring, and the inclined surface of the supporting plate provides a rotating space for the long baffle plate 19, so that the long baffle plate 19 can be smoothly returned to the horizontal position, and the connecting belt 18 can be conveniently placed next time;
(c) attaching the upper film and the lower film: the upper film 13 enters the conveying roller 5 through the second guide roller 4, the upper film 13 entering the conveying roller 5 is attached to the lower film 14, and the unwinding speeds of the first film roller and the second film roller are the same;
(d) transversely heat-sealing the packaging bag: referring to fig. 2 and 4, the linear motor drives the moving rod 22 of the transverse heat sealing unit 6 to move downward, the heat sealing plates 24 fixedly connected with the moving rod 22 are also close to the upper and lower films, the heat sealing plates 24 with symmetrical upper and lower structures move in opposite directions, when the upper and lower heat sealing plates 24 are pressed together, transverse heat sealing to the upper and lower films attached in the step (c) is formed, and transverse heat sealing forms the transverse sealing strip 32 of the packaging bag, when in heat sealing, the connecting belt 18, which is positioned between the upper and lower films, is in heat sealing with the upper and lower films, when in transverse heat sealing, the heat sealing time of the two heat sealing plates 24 is 1s, the heat sealing pressure is 0.2Mpa, the heat sealing temperature is 120 ℃, and the heat sealing pressure is the pressure between the upper and lower heat sealing plates 24 of the transverse heat sealing unit 6;
in the process that the heat sealing plate 24 of the transverse heat sealing unit 6 moves downwards, the pressure of a closed cavity formed by the heat sealing plate 24 and the heat sealing cylinder 23 is reduced, on one hand, outside air enters the closed cavity through the one-way air inlet valve 34, and preparation is made for cooling the ejected gas in the step (e); on the other hand, the pressure is reduced, so that the blocking block 25 moves upwards relative to the heat sealing plate 24 under negative pressure, and the lower surface of the blocking block 25 which finishes the upwards movement is just parallel to the lower surface of the heat sealing plate 24, thereby avoiding the occurrence of poor heat sealing of the transverse sealing strip 32 caused by the fact that the lower surface of the blocking block 25 protrudes out of the heat sealing plate 24;
(e) preliminary cooling of the cross seal 32: the linear motor drives the moving rod 22 of the transverse heat sealing unit 6 to move upwards, the heat sealing plate 24 moves upwards, the pressure intensity of a closed cavity formed by the heat sealing plate 24 and the heat sealing cylinder 23 is increased, the blocking block 25 moves downwards relative to the heat sealing plate 24 under the pressure intensity and the self gravity, a step hole on the heat sealing plate 24 is exposed, further, gas in the closed cavity is sprayed out from the step hole of the heat sealing plate 24, and the sprayed gas carries out primary cooling on the transverse sealing strip 32 in the step (d);
(f) longitudinal heat sealing of the packaging bag: the packaging bag processed in the step (e) is conveyed to a longitudinal heat sealing unit 7 with a reciprocating function along with a conveying roller 5, and because the longitudinal heat sealing unit 7 and the transverse heat sealing unit 6 have the same structure, when a movable rod 22 on the longitudinal heat sealing unit 7 moves downwards, a heat sealing plate 24 fixedly connected with the movable rod 22 on the longitudinal heat sealing unit 7 is also close to an upper film and a lower film, the heat sealing plates 24 with symmetrical upper and lower structures move oppositely, when the upper heat sealing plate 24 and the lower heat sealing plate 24 are pressed mutually, the longitudinal heat sealing unit 7 carries out heat sealing on the upper film and the lower film, longitudinal heat sealing forms a longitudinal sealing strip 33 of the packaging bag, the heat sealing time between the upper heat sealing plate 24 and the lower heat sealing plate 24 of the longitudinal heat sealing unit 7 is 1s, the heat sealing;
(g) preliminary cooling of the longitudinal seal 33: the longitudinal heat sealing unit 7 and the transverse heat sealing unit 6 have the same structure, so that the longitudinal heat sealing unit and the transverse heat sealing unit have the same primary cooling principle for the packaging bags, namely when the moving rod 22 of the longitudinal heat sealing unit 7 moves upwards, the heat sealing plate 24 moves upwards, the pressure of a closed chamber formed by the heat sealing plate 24 and the heat sealing cylinder 23 is increased, the block 25 is pushed open, the gas in the closed chamber is sprayed out from the step hole of the heat sealing plate 24, and the sprayed gas performs primary cooling on the longitudinal sealing strip 33 formed in the step (f);
(h) the wrapping bag is colded pressing stereotyped, is cut and the wrapping bag is collected: flattening the packaging bags finished in the step (g) under the action of a flattening roller 8, enabling the packaging bags to enter a cooling unit 9 under the action of a traction roller 10 for cooling and shaping, cutting the packaging bags finished in the cooling and shaping into single packaging bags in a cutting unit 11, and finally collecting the single packaging bags in a collecting unit 12.
The packaging bag formed according to the steps (a) to (h) is shown in fig. 6.
Because the processing machine is configured for the assembly line production of the packaging bags, the placing unit 15, the transverse heat-sealing unit 6 and the longitudinal heat-sealing unit 7 are synchronously linked through the sealing cylinder 28 and the connecting rod 26, namely when the linear motor drives the moving rod 22 of the transverse heat-sealing unit 6 to move downwards, the longitudinal heat-sealing unit 7 and the transverse heat-sealing unit 6 keep the same and synchronous action through the connecting rod 26; meanwhile, the moving rod 22 of the transverse heat-sealing unit 6 drives the second piston 27 to move downwards together through the sealing cylinder 28, and in the downward movement process, the pressure of the sealed accommodating cavity 29 is increased to drive the first piston 17 to move upwards, and the piston rod 16 fixedly connected with the first piston 17 moves upwards; therefore, when the three units synchronously act, three packaging bags which are connected in sequence are aimed at, when the longitudinal heat-sealing unit 7 performs longitudinal heat sealing on a first packaging bag, the transverse heat-sealing unit 6 performs transverse heat sealing on a second packaging bag, and the placing unit 15 performs placing of the connecting belt 18 on a third packaging bag; the three units in synchronous linkage guarantee the balance of the beats of all the working procedures in the manufacturing process of the packaging bag, and are beneficial to improving the production efficiency.
Increase connecting band 18 on the wrapping bag for can bind each other through connecting band 18 between the frozen product wrapping bag that freezes and connect and form a whole, reduce adjacent freezing fresh and frozen product wrapping bag relative motion in the transportation, and then avoid the wearing and tearing between the fresh and frozen product wrapping bag.
In addition, add connecting band 18 in the wrapping bag for artifical when carrying the frozen article wrapping bag of giving birth to for the bright article of freezing, can grasp connecting band 18 and mention it, the condition of freezing the hand when having avoided artifical direct hand to hold frozen article wrapping bag of giving birth to takes place.
The connecting band 18 is an upper connecting band 181 and a lower connecting band 182 which are adhered to each other, so that when the packaging bag needs to be opened, the upper connecting band 181 and the lower connecting band 182 are manually pulled in opposite directions, the upper film and the lower film of the packaging bag can be separated, the purpose of opening the packaging bag without other auxiliary tools is achieved, and the packaging bag can be conveniently opened at any time and any place.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (5)

1. The processing method of the fresh frozen product packaging bag is characterized by comprising the following steps: a processing mechanism is required to be used, and the processing mechanism sequentially comprises a unwinding roller II, a guide roller I, an unwinding roller I, a guide roller II, a conveying roller, a transverse heat sealing unit, a longitudinal heat sealing unit, a flattening roller, a cooling unit, a traction roller, a slitting unit and a collecting unit from left to right;
a placing unit is arranged between the first guide roller and the first unwinding roller and is positioned above the lower film; the placing unit comprises a piston rod and a piston I, and a plurality of connecting belts are sleeved on the piston rod; the connecting band comprises an upper connecting band and a lower connecting band which are adhered to each other, the upper connecting band and the lower connecting band are adhered to each other at the middle section, round holes are arranged on the adhering sections of the upper connecting band and the lower connecting band, the connecting band is sleeved on the piston rod through the round holes, the lowest end of the piston rod is hinged with a short baffle, the piston rod is sleeved with a plurality of connecting bands and supporting blocks, the connecting bands and the supporting blocks sleeved on the piston rod from bottom to top are arranged at intervals, and the; a long baffle and a short baffle are hinged to the piston rod in the height direction, and the rotating radius of the long baffle is larger than that of the short baffle; the two articulated shafts are sleeved with torsion springs, the long baffle is positioned above the short baffle, the connecting belt at the lowest part is positioned above the short baffle, and the connecting belt at the next lower part is positioned above the long baffle;
the transverse heat sealing unit comprises a moving rod, a heat sealing cylinder and a heat sealing plate which are symmetrical in up-down structure, the heat sealing plate is connected in the heat sealing cylinder in a sliding mode, a closed cavity is formed between the heat sealing plate and the heat sealing cylinder, and a one-way air inlet valve is arranged at the upper portion of the heat sealing cylinder; the heat sealing plate is fixedly connected with the moving rod, the moving rod penetrates out of the heat sealing cylinder, a plurality of step holes are formed in the heat sealing plate, and the step holes are connected with blocking blocks in a sliding mode; the moving rod of the transverse heat-sealing unit is driven by a linear motor to move up and down in a reciprocating manner; a second piston penetrates through the moving rod positioned at the upper part in the transverse heat-sealing unit;
a sealing cylinder is connected between the placing unit and the transverse heat-sealing unit, a first piston and a second piston are respectively connected in the two bottoms of the sealing cylinder in a sliding manner, a sealed containing cavity is formed between the first piston and the second piston, a piston rod of the placing unit is sleeved with a pressure spring, the top end of the pressure spring is fixedly connected to the bottom of the sealing cylinder, and a pressure plate is arranged between the bottom end of the pressure spring and the uppermost connecting belt;
the processing method comprises the following steps:
(a) film unwinding: installing a first film roller of an upper film on a first unwinding roller and installing a second film roller of a lower film on a second unwinding roller;
(b) placing a connecting belt: after the lower film in the step (a) enters the conveying roller through the first guide roller, the linear motor drives the moving rod of the transverse heat-sealing unit to move downwards, the second piston moves downwards along with the first piston, the first piston is driven to move upwards through the closed containing cavity in the downward movement process, the piston rod fixedly connected with the first piston moves upwards, and the connecting belt and the supporting block sleeved on the piston rod are abutted by the pressure spring and the pressure plate, so that when the piston rod moves upwards, the short baffle and the long baffle are extruded by the connecting belt and the supporting block to rotate, the connecting belt at the lowest part loses support, and then the lower film falls onto the upper surface of the lower film under the action of gravity; (c) attaching the upper film and the lower film: the upper film enters the conveying roller through the second guide roller, and the upper film entering the conveying roller is attached to the lower film;
(d) transversely heat-sealing the packaging bag: the linear motor drives the moving rod of the transverse heat sealing unit to move downwards, the heat sealing plates fixedly connected with the moving rod are also close to the upper film and the lower film, the heat sealing plates with symmetrical upper and lower structures move oppositely, when the upper heat sealing plate and the lower heat sealing plate are mutually pressed, transverse heat sealing for the upper film and the lower film which are attached in the step (c) is formed, transverse heat sealing forms a transverse sealing strip of the packaging bag, and during heat sealing, a connecting strip positioned between the upper film and the lower film is welded with the upper film and the lower film along with the heat sealing of the upper film and; the heat sealing time in transverse heat sealing is 0.5-1.5s, the heat sealing pressure is 0.18MPa-0.25MPa, the heat sealing temperature is 110-130 ℃, and the heat sealing pressure is the pressure between the upper heat sealing plate and the lower heat sealing plate of the transverse heat sealing unit;
(e) longitudinal heat sealing of the packaging bag: the packaging bag after the step (d) is conveyed to a longitudinal heat sealing unit with a reciprocating function along with a conveying roller, longitudinal heat sealing is carried out to form a longitudinal sealing strip of the packaging bag, the heat sealing time between an upper heat sealing plate and a lower heat sealing plate of the longitudinal heat sealing unit is 0.5-1.5s, the heat sealing pressure is 0.18MPa-0.25MPa, and the heat sealing temperature is 110-;
(f) the wrapping bag is colded pressing stereotyped, is cut and the wrapping bag is collected: flattening the packaging bags subjected to the step (e) under the action of flattening rollers, enabling the packaging bags to enter a cooling unit for cooling and shaping under the action of a traction roller, cutting the packaging bags subjected to cooling and shaping into single packaging bags in a cutting unit, and finally collecting the single packaging bags in a collecting unit.
2. The method for processing the fresh frozen product packaging bag according to claim 1, wherein: further comprising, between steps (d) and (e), a preliminary cooling of the transverse seals provided: and (d) after the transverse sealing unit completes the heat sealing of the transverse sealing strip, ejecting gas by the transverse sealing unit, and preliminarily cooling the transverse sealing strip in the step (d) by the ejected gas.
3. The method for processing the fresh frozen product packaging bag according to claim 2, wherein: further comprising the preliminary cooling of the longitudinal seal provided between step (e) and step (f): and (e) after the longitudinal heat sealing unit completes the heat sealing of the longitudinal sealing strip, the longitudinal heat sealing unit sprays gas, and the sprayed gas preliminarily cools the longitudinal sealing strip in the step (e).
4. The method for processing the fresh frozen product packaging bag according to claim 3, wherein: and (e) fixedly connecting a connecting rod between the transverse heat-sealing unit and the longitudinal heat-sealing unit in the steps (d) to (e), wherein the connecting rod enables the heat-sealing plate of the transverse heat-sealing unit and the longitudinal heat-sealing unit to move up and down synchronously.
5. The method for processing the fresh frozen product packaging bag according to claim 4, wherein the method comprises the following steps: the connecting belt in the step (b) is made of PE materials, and the upper film and the lower film are PE films.
CN201811558981.6A 2018-12-19 2018-12-19 Processing method of fresh frozen product packaging bag Active CN109648916B (en)

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CN2603230Y (en) * 2003-01-28 2004-02-11 吕敬辉 Negative pressure motor
CN101225923B (en) * 2008-01-31 2011-12-07 浙江省农业科学院 Freeze bag for storing liquid nitrogen refrigeration material
CN203152153U (en) * 2013-04-15 2013-08-28 厦门创凯工贸有限公司 Pulling rope type composite bag for fruit bagging
CN103950621B (en) * 2014-04-14 2016-04-27 浙江新新包装机械有限公司 A kind of Bag Making Machine making bundle pocket
CN204368523U (en) * 2014-12-17 2015-06-03 河北联合大学 A kind of packing film seals fervent all-in-one
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