JP6980057B2 - Manufacturing method of film packaging bag with contents, vertical bag filling and packaging machine, film packaging bag with contents - Google Patents

Description

The present invention relates to a film packaging bag containing contents, a vertical bag-making filling and packaging machine, and a method for manufacturing a film packaging bag containing contents.

Film packaging bags containing food are on the market. Such a film packaging bag is called a pouch bag. In a vertical bag-making filling machine that makes a film packaging bag and fills foods and the like, a heat seal that heats and welds the film has been used.
In recent years, ultrasonic seals have been developed in response to demands for efficiency and simplification of seal formation, stability of quality, and the like.

Japanese Unexamined Patent Publication No. 2018-002215

However, the ultrasonic seal also has various drawbacks. For example, the seal cannot be formed in a short time without softening the film. If the film has a step in the thickness direction, the seal cannot be formed.
Further, when a seal (submerged seal) is formed in a state where a tubular film is filled with a fluid such as a liquid, a seal defect or edge breakage is likely to occur. In particular, if impurities remain in the portion where the seal is formed, steam explosion (foaming) occurs at the time of welding, and seal defects such as pinholes and cracks occur.

The present invention provides a film packaging bag containing contents, a vertical bag-making filling and packaging machine, and a method for manufacturing a film packaging bag containing contents, which can improve the efficiency of forming a seal portion and stabilize the quality.

An embodiment of the content-containing film packaging bag according to the present invention is a content-containing film packaging bag in which a fluid is sealed in a film packaging bag having a sealing portion in which films are welded to each other, and the sealing portion is formed between the films. Is characterized by having a first seal comprising a heat-welded preheat seal and an ultrasonic seal further ultrasonically welded.

In the embodiment of the film packaging bag containing the contents according to the present invention, the seal portion has a second seal including only a heat seal in which the films are heat-welded to each other, and the preheat seal is more than the second seal. It is characterized by low welding strength.

An embodiment of the content-containing film packaging bag according to the present invention is characterized in that the ultrasonic seal has a narrower width than the preheat seal.

An embodiment of the content-containing film packaging bag according to the present invention is characterized in that the width of the ultrasonic seal is 50 to 90% of the width of the preheat seal.

An embodiment of the content-containing film packaging bag according to the present invention is that the ultrasonic seal and the preheat seal are superposed on the outside of the film packaging bag, and only the preheat seal is arranged on the inside of the film packaging bag. It is characterized by.

An embodiment of the content-containing film packaging bag according to the present invention is characterized in that the first seal is arranged on opposite side sides of the outer periphery of the film packaging bag.

An embodiment of the vertical bag-making filling and packaging machine according to the present invention is a vertical bag-making filling and packaging machine that creates a film packaging bag and encloses a fluid, and transports a film that conveys a tube film downward. A portion, a filling portion for charging a fluid inside the tube film, a horizontal sealing portion for welding the tube film in the width direction to form a bag body, and a cutter portion for separating the bag body from the tube film. The horizontal seal portion includes a preheat seal portion that heats and welds the tube film, and an ultrasonic seal portion that further applies ultrasonic waves to the preheat seal formed by the preheat seal portion to weld the film. It is characterized by being prepared.

An embodiment of the vertical bag-making filling and packaging machine according to the present invention includes a vertical sealing portion that heat-welds strip-shaped films to each other to form the tube film, and the heating time of the preheat sealing portion is set to the vertical sealing portion. It is characterized by being shorter than the heating time of.

An embodiment of the vertical bag-making filling and packaging machine according to the present invention is characterized in that the ultrasonic seal portion further cools and solidifies the preheat seal.

An embodiment of the vertical bag-making filling and packaging machine according to the present invention is characterized in that the ultrasonic sealing portion has a narrower sealing width than the preheat sealing portion.

In an embodiment of the vertical bag-making filling and packaging machine according to the present invention, the ultrasonic seal portion is formed so that the ultrasonic seal is symmetrically superimposed on the preheat seal formed by the preheat seal portion in the vertical direction. It is characterized by doing.

An embodiment of the vertical bag-making filling and packaging machine according to the present invention is characterized in that the ultrasonic seal portion has a non-seal forming region extending in the seal length direction at the center in the seal width direction.

An embodiment of the vertical bag-making filling and packaging machine according to the present invention is characterized in that the cutter portion cuts a portion of the horizontal seal formed by the horizontal seal portion corresponding to the non-seal forming region. ..

An embodiment of the method for manufacturing a film packaging bag containing contents according to the present invention is a method for manufacturing a film packaging bag containing contents in which a film packaging bag is manufactured and a fluid is enclosed, and the tube film is conveyed downward. A film transfer step, a filling step of filling the inside of the tube film with a fluid, a horizontal sealing step of welding the tube film over the width direction to form a bag body, and a bag body from the tube film. The horizontal sealing step includes a cutting step for separating, a preheat sealing step for heating and welding the tube film, and an ultrasonic wave for further applying ultrasonic waves to the preheat seal formed in the preheat sealing step. It is characterized by including a sealing process.

An embodiment of the method for producing a film packaging bag containing contents according to the present invention includes a vertical sealing step of heat-welding strip-shaped films to each other to form the tube film, and the preheat sealing formed by the preheat sealing step is a preheat sealing step. It is characterized by having a lower welding strength than the vertical seal formed in the vertical seal step.

According to the present invention, it is possible to realize a film packaging bag containing contents, a vertical bag-making filling and packaging machine, and a method for manufacturing a film packaging bag containing contents, which can improve the efficiency of forming a seal portion and stabilize the quality.

It is a front view of the film packaging bag 100 containing contents. It is a side view which shows the schematic structure of the bag making filling packaging machine 1. It is a front view which shows the filling part 30 and the like. It is a front view which shows the side seal part 60 and the cutter part 70. It is a side view which shows the side seal part 60 and the cutter part 70. (A) A vertical sectional view of the heater bar 62, and (b) a front view of the anvil bar 67.

Hereinafter, a method for manufacturing the film packaging bag 100, the vertical bag-making filling and packaging machine 1, and the content-containing film packaging bag 100 according to the embodiment of the present invention will be described.

[Film packaging bag 100]
FIG. 1 is a front view of a film packaging bag 100 containing contents.
The film packaging bag 100 is a so-called standing pouch type packaging body, and is manufactured by the vertical bag-making filling and packaging machine 1 described later.

The film packaging bag 100 is formed by sealing (heat welding, ultrasonic welding) the four sides of the strip-shaped film F. The film packaging bag 100 has sealing portions on its four sides. The seal portion includes a bottom seal 101, a bottom reinforcing seal 102, a top seal 103, and a side seal 104.

The film F is a laminated film in which a high-strength film such as nylon or polyester is laminated. The film F has a sealing layer on the inner surface, and is laminated so that the inner surfaces are welded to each other but the outer surfaces are not welded to each other.

The film packaging bag 100 is filled with the contents X such as food (food and drink). The content X is a fluid such as a liquid. Or it is a mixture of fluid and solid. The fluid also includes liquids, jellies and pastes.
The film packaging bag 100 can stand on its own (stand up) in a state where the content X is filled.

The vertical direction when the film packaging bag 100 stands on its own is also referred to as a vertical direction.
The width direction when the film packaging bag 100 is self-supporting is also referred to as a lateral direction. In the lateral direction, the inner side of the film packaging bag 100 is referred to as the inner side, and the outer side (end side) is referred to as the outer side.
The directions orthogonal to each other in the vertical and horizontal directions are called the thickness direction.
The extending direction, the width direction, and the thickness direction of the side seal 104 correspond to the seal length direction, the seal width direction, and the rule thickness direction, respectively.

<Bottom seal 101, bottom reinforcement seal 102>
The bottom seal (seal portion, second seal, vertical seal) 101 is formed on the lower side of the film packaging bag 100 by the bottom seal portion 21 described later.
The bottom reinforcing seals (seal portion, second seal, vertical seal) 102 are formed at both ends of the lower side of the film packaging bag 100 by the second bottom reinforcing seal portion 22 described later.

On the lower end side of the film packaging bag 100, a gusset portion 100a in which the film F is double-folded (M-shaped) is provided. The gusset portion 100a includes two outer folding portions in which the inner surfaces of the film F are in close contact with each other, and one inner folding portion in which the outer surfaces of the film F are in close contact with each other. An inner fold is placed between the two outer folds.
The gusset portion 100a is provided by forming the bottom seal 101 and the bottom reinforcing seal 102 in a state where the film F is folded into an M shape.

The bottom seal 101 welds the two outer folds of the gusset portion 100a, respectively. The bottom reinforcing seal 102 welds the lower ends of the side sides of the film packaging bag 100 from both ends of the gusset portion 100a. The bottom reinforcing seal 102 extends from both ends of the bottom seal 101 toward the side seal 104 via the inwardly folded portion.

In the gusset portion 100a, the inner surfaces of the film F are welded to each other by the bottom seal 101 and the bottom reinforcing seal 102, but the outer surfaces of the film F are not welded to each other. Therefore, the gusset portion 100a has a bifurcated shape. The lower end of the film packaging bag 100 can be opened and closed starting from the inner folding portion of the gusset portion 100a.
When the gusset portion 100a of the film packaging bag 100 is opened, the thickness of the lower portion of the film packaging bag 100 increases. As a result, the film packaging bag 100 can stand on its own (standing) with the gusset portion 100a at the bottom.
On the other hand, when the gusset portion 100a of the film packaging bag 100 is closed, the thickness of the lower portion thereof becomes thin. This makes it easier for the film packaging bag 100 to be placed flat (stacked).

<Top seal 103>
The top seal (seal portion, second seal, vertical seal) 103 is formed at the upper end of the film packaging bag 100 by the top seal portion 24 described later.
The top seal 103 welds the upper side of the film packaging bag 100 and forms the peripheral portion of the drinking spout of the film packaging bag 100.
A notch N for tearing is provided on the upper end side of the top seal 103. The film F is cut laterally from this notch N as a starting point, and the upper end side of the top seal 103 is cut off. As a result, a drinking spout appears at the upper end of the film packaging bag 100.

<Side seal 104>
The side seals (seal portion, first seal, horizontal seal) 104 are formed at both ends of the film packaging bag 100 in the lateral direction by the horizontal seal portions 60 described later. The side seals 104 are arranged on opposite side sides of the outer circumference of the film packaging bag 100, respectively.
The side seal 104 welds the side sides of the film packaging bag 100. The side seal 104 extends in the vertical direction and connects the top seal 103 and the bottom reinforcing seal 102.

The side seal 104 includes a preheat seal 105 and an ultrasonic seal 106.
The preheat seal 105 is obtained by heating the films F to each other and incompletely welding them. The preheat seal 105 functions as a temporary fixing. That is, the welding strength is lower than that of the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103. When an external force is applied to the film packaging bag 100, the preheat seal 105 may be destroyed (leaked). For example, gripping the film packaging bag 100 may destroy the preheat seal 105.

The ultrasonic seal 106 is obtained by applying ultrasonic waves to the preheat seal 105 to further weld the films F to each other. The ultrasonic seal 106 is obtained by double welding the film F in the thickness direction of the film packaging bag 100. In the ultrasonic seal 106, the films F are sufficiently welded to each other.

The side seal 104 extends linearly along the vertical direction. The seal width of the side seal 104 is constant (6.5 mm) in the vertical direction.
The seal width of the preheat seal 105 is equal to the seal width of the side seal 104. The ultrasonic seal 106 has a narrower seal width than the preheat seal 105. For example, the ultrasonic seal 106 has a seal width of 5 mm, and the preheat seal 105 has a seal width of 6.5 mm. The seal width of the ultrasonic seal 106 is preferably 50 to 90% of the seal width of the preheat seal 105.
The ultrasonic seal 106 is arranged so as to completely superimpose on the preheat seal 105. The preheat seal 105 and the ultrasonic seal 106 are superposed on each other from the outside to the center of the side seal 104. Inside the side seal 104, only the preheat seal 105 is arranged. The preheat seal 105 protrudes 1.5 mm from the inside of the ultrasonic seal 106 in the seal width direction.

In the film packaging bag 100, since the side seal 104 has the preheat seal 105 and the ultrasonic seal 106, the drawbacks of ultrasonic welding can be compensated for by temporary welding while taking advantage of ultrasonic welding.
Since the film F is softened by the formation of the preheat seal 105, the ultrasonic seal 106 can be formed in a short time.
Even if there is a step in the thickness direction at the portion where the ultrasonic seal 106 is formed (the side side of the film packaging bag 100), the film F is softened by the formation of the preheat seal 105 and the step is eliminated. It can be formed well.
The ultrasonic seal 106 is often formed by a method called a submerged seal. That is, the ultrasonic seal 106 is formed in a state where the film F is filled with a fluid (content X). In such a case, poor sealing and broken edges are likely to occur. However, since the preheat seal 105 is formed prior to the formation of the ultrasonic seal 106, it is difficult for a seal defect or edge breakage to occur.
Further, by forming the preheat seal 105, it is difficult for impurities to remain in the portion where the ultrasonic seal 106 is formed. Therefore, foaming of impurities (steam explosion) does not occur when the ultrasonic seal 106 is formed, and there is little possibility of sealing failure such as pinholes and cracks.
Therefore, in the film packaging bag 100, the formation efficiency of the side seal 104 and the quality stability can be improved.

[Vertical bag making filling and packaging machine 1]
FIG. 2 is a side view showing a schematic configuration of the bag-making filling / packaging machine 1.
FIG. 3 is a front view showing the filling portion 30 and the like.
FIG. 4 is a front view showing the horizontal seal portion 60 and the cutter portion 70.
FIG. 5 is a side view showing the horizontal seal portion 60 and the cutter portion 70.
6 (a) is a vertical sectional view of the heater bar 62, and FIG. 6 (b) is a front view of the anvil bar 67.

The vertical bag-making filling and packaging machine 1 forms a film packaging bag 100 from a strip-shaped film F, and fills the film packaging bag 100 with the contents X.
The vertical bag-making filling / packaging machine 1 divides the strip-shaped film F into two in the width direction, and manufactures the film packaging bag 100 from each of the two divided films F. As a result, the vertical bag-making filling and packaging machine 1 can efficiently produce the film packaging bag 100 containing the contents.

The vertical bag-making filling / packaging machine 1 is controlled by a control unit (not shown) to fill the contents X while intermittently transporting the film F downward.
The vertical bag-making filling / packaging machine 1 puts (encloses) the content X inside the film packaging bag 100. The film packaging bag 100 is fully filled with the contents X without containing air.
The vertical bag-making filling and packaging machine 1 continuously manufactures a film packaging bag 100 containing contents.

The vertical bag-making filling / packaging machine 1 includes two sets of members and the like arranged on the downstream side of the M-shaped guide 12, which will be described later. These members and the like are arranged in parallel along the transport direction of the film F.
In the following description, a structure for manufacturing the film packaging bag 100 from one of the two divided films F (simply referred to as film F) will be described.

As the film F, a laminated film in which a high-strength film such as nylon or polyester is laminated is used. The film F has a sealing layer on the inner surface, and is laminated so that the inner surfaces are welded to each other but the outer surfaces are not welded to each other.

The longitudinal direction of the film F is also referred to as a transport direction. The width direction of the film F is also referred to as a lateral direction.
The longitudinal direction of the film F when the content X is filled is called the vertical direction. The vertical direction is the vertical direction, and the downward direction is the transport direction of the film F.
The horizontal (width) direction of the film F when the content X is filled is also referred to as a left-right direction.
The thickness direction of the film F when the content X is filled is also referred to as a front-back direction.

The vertical direction of the vertical bag-making filling and packaging machine 1 corresponds to the horizontal direction of the film packaging bag 100.
The front-rear direction of the vertical bag-making filling and packaging machine 1 corresponds to the thickness direction of the film packaging bag 100.
The left-right direction of the vertical bag-making filling and packaging machine 1 corresponds to the vertical direction of the film packaging bag 100. The right side of the vertical bag making filling and packaging machine 1 corresponds to the upper part (top seal 103) side of the film packaging bag 100, and the left side of the vertical bag making filling and packaging machine 1 corresponds to the lower part (bottom seal 101) side of the film packaging bag 100. Corresponds to.

The vertical bag-making filling and packaging machine 1 includes a bag-making guide unit 10, a vertical sealing unit 20, a filling unit 30, a design cutter unit 40, a film transport unit 50, a horizontal sealing unit 60, and a cutter unit 70. Each of these parts is supported by a frame (not shown).
The film F is rolled into a roll and supported by the film shaft 3.

[Bag making guide part 10]
The bag making guide portion 10 includes a cutter 11, an M-shaped guide 12, a two-fold guide 13, and a folding guide 14.
The cutter 11, the M-shaped guide 12, the folding guide 13, and the folding guide 14 are arranged in this order in the transport direction of the film F. The feeding direction of the film F in the bag making guide portion 10 is the forward direction (horizontal direction).

The cutter 11 is arranged at the center position in the width direction of the film F in the transport path of the film F. By transporting the film F in the longitudinal direction, the cutter 11 cuts the film F along the longitudinal direction while dividing the film F into two at the center in the width direction.

The M-shaped guide 12 is a plate-shaped member arranged so that the main surface is perpendicular to the transport direction of the film F. The M-shaped guide 12 guides the film F divided into two parts outward in the width direction in a state of being twisted by 90 °.

The bi-fold guide 13 is a triangular plate-shaped member. The bi-fold guide 13 folds the film F in half at the center in the width direction using the main surface and the two hypotenuses.
The folding guide 14 is a triangular plate-shaped member arranged adjacent to the folding guide 13. The folding guide 14 folds the mountain-folded portion of the film F folded in half into an M-shape. That is, the folding guide 13 and the folding guide 14 form the gusset portion 100a of the film packaging bag 100.

The bag making guide unit 10 further includes guide rollers 15 and 16 for guiding the transfer of the film F divided into two.
The guide roller 15 is arranged between the M-shaped guide 12 and the bi-fold guide 13, and causes the film F facing outward to face inward.
The pair of guide rollers 16 are arranged on the downstream side of the folding guide 14 and sandwich the film F folded in half.

[Vertical seal portion 20]
The vertical seal portion 20 heat-welds the film F along the vertical direction using a heater bar. The vertical seal portion 20 is intermittently driven in synchronization with the intermittent transfer of the film F.
The vertical sealing portion 20 forms the film F in a tubular shape. This tube film is called a film Fc.

The vertical seal portion 20 includes a bottom seal portion 21, a bottom reinforcing seal portion 22, a top seal portion 24, and a top cooling portion 25.
In the transport direction of the film F, the bottom seal portion 21, the bottom reinforcing seal portion 22, the top seal portion 24, and the top cooling portion 25 are arranged in this order.

The bottom seal portion 21 heat-welds the gusset portion 100a of the film F to form the bottom seal 101 on the film F.
The bottom reinforcing seal portion 22 heat-welds the gusset portion 100a of the film F to form the bottom reinforcing seal 102 on the film F. The bottom reinforcing seal portion 22 is arranged adjacent to the downstream side (front direction) of the bottom seal portion 21 in the transport direction of the film F.

The top seal portion 24 heat-welds the side ends of the film F to form the top seal 103 on the film F.
The top cooling unit 25 cools the top seal 103. The top cooling portion 25 is arranged adjacent to the downstream side (downward direction) of the top seal portion 24 in the transport direction of the film F.
By cooling the top seal 103 with the top cooling unit 25, the film Fc can be immediately transferred to the next step.

The guide roller 23 is arranged between the bottom reinforcing seal portion 22 and the top seal portion 24. The guide roller 23 changes the transport direction of the film F from the front (horizontal) direction to the downward (vertical) direction.
The film F is fed horizontally (forward) in the bottom seal portion 21 and the bottom reinforcing seal portion 22, and the film F is fed in the vertical direction (downward) in the top seal portion 24 and the top cooling portion 25.

[Filling section 30]
The filling unit 30 is provided with a charging pipe 31 and the like, and the content (fluid) X is charged inside the film Fc.
The charging pipe 31 is arranged between the bottom seal portion 21 and the top seal portion 24 in the transport direction of the film F. The input pipe 31 is inserted from the side of the film F to the inner surface side, bends downward, and enters the inside of the film Fc. The input pipe 31 extends downward, and its tip (discharge port) is arranged directly above the lateral seal portion 60.

[Design cutter section 40]
The design cutter portion 40 is arranged downstream (downward) of the top seal portion 24 in the transport direction of the film F.
The design cutter unit 40 includes a bottom cutter 41 and a top cutter 42.
The bottom cutter 41 arranges the shapes of the bottom seal 101 and the bottom reinforcing seal 102 formed by the bottom seal portion 21 and the bottom reinforcing seal portion 22.
The top cutter 42 adjusts the shape of the top seal 103 formed by the top seal portion 24.

[Film carrier 50]
The film transport unit 50 is arranged downstream of the design cutter unit 40 and upstream of the tip of the charging pipe 31 (loading position of the content X) in the transport direction of the film F.
The film transport unit 50 includes a pair of transport rollers 51. The pair of transport rollers 51 are closely arranged in the front-rear direction (thickness direction of the film Fc) with the film Fc interposed therebetween. A pair of transport rollers 51 are arranged on both sides of the film Fc in the width (left and right) direction.
The film transport unit 50 transports (feeds) the film Fc downward by rotating the transport rollers 51 while sandwiching the film Fc.

[Horizontal seal portion 60]
The lateral seal portion 60 is arranged below the tip of the input pipe 31 and welds the film Fc over the width direction. The lateral seal portion 60 forms a side seal 104 on the film Fc.
The horizontal seal portion 60 is intermittently driven in synchronization with the intermittent transfer of the film F. As a result, side seals 104 are formed on the film Fc at regular intervals in the vertical direction.
By forming (sealing) the side seal 104 on the film Fc, the content X filled in the film Fc is divided into upper and lower parts with the side seal 104 as a boundary. Further, when the side seal 104 is formed on the film Fc, the bag body Fa appears at the lower end of the film Fc. The contents X are enclosed (full-filled) in this bag body Fa.

The horizontal seal portion 60 includes a preheat seal portion 61 and an ultrasonic seal portion 65.
The preheat seal portion 61 heat-welds the film Fc laterally using the heater bar 62 and the heater receiving bar 63. The preheat seal portion 61 forms the preheat seal 105 of the side seals 104.
The ultrasonic sealing unit 65 ultrasonically welds the film Fc in the lateral direction using the horn bar 66 and the anvil bar 67. The ultrasonic seal portion 65 forms the ultrasonic seal 106 of the side seal 104.

The preheat sealing portion 61 and the ultrasonic sealing portion 65 are arranged in this order in the transport (downward) direction of the film Fc.
The arrangement interval between the preheat sealing portion 61 and the ultrasonic sealing portion 65 in the vertical direction corresponds to the intermittent transport distance of the film Fc. Therefore, the ultrasonic sealing unit 65 further welds the portion where the film Fc is heat-welded to each other by the preheat sealing unit 61 by ultrasonic waves. The ultrasonic seal 106 is formed by superimposing the ultrasonic seal 106 on the preheat seal 105.
That is, the horizontal sealing portion 60 welds the films F to each other twice (twice) in the thickness direction of the film Fc.

The preheat seal portion 61 heats the films F to each other (film Fc) and incompletely welds them. The preheat seal portion 61 heat-welds the films F to each other and temporarily fixes them.
The preheat seal portion 61 has a shorter heating time than the vertical seal portion 20 (bottom seal portion 21, bottom reinforcing seal portion 22, top seal portion 24). Therefore, the preheat seal 105 has a lower welding strength than the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103. When an external force is applied to the film packaging bag 100, the preheat seal 105 may be destroyed (leaked).
During the production of the film packaging bag 100 containing the contents (until the ultrasonic seal 106 is formed), no external force is applied to the film packaging bag 100, so that the preheat seal 105 is not destroyed.

The ultrasonic seal unit 65 applies ultrasonic waves to the preheat seal 105 to further weld the films F to each other. The ultrasonic seal portion 65 sufficiently welds the films F to each other to form the ultrasonic seal 106. The welding strength of the ultrasonic seal 106 is equivalent to that of the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103.

The heater bar 62, the heater receiving bar 63, the horn bar 66, and the anvil bar 67 each extend linearly in the left-right direction. The width (seal width) of the seal forming surface of the heater bar 62 and the heater bar 66 is constant.
The seal width of the heater bar 62 and the heater receiving bar 63 is equal to the (downward) width of the side seal 104. The horn bar 66 and the anvil bar 67 have a narrower seal width than the heater bar 62 and the heater receiving bar 63. For example, the horn bar 66 and the anvil bar 67 have a seal width of 15 mm, and the heater bar 62 and the heater receiving bar 63 have a seal width of 18 mm. The seal width of the horn bar 66 and the anvil bar 67 is preferably 50 to 90% of the seal width of the heater bar 62 and the heater receiving bar 63.

The vertical distance (distance between centers) between the heater bar 62 and the horn bar 66 corresponds to the intermittent transport distance of the film Fc. Therefore, the ultrasonic seal 106 is completely superposed on the preheat seal 105. The ultrasonic seal 106 is superimposed on the center of the preheat seal 105 in the vertical direction. The ultrasonic seal 106 superimposes symmetrically on the preheat seal 105 in the vertical direction. The preheat seal 105 is arranged so as to protrude by 2 mm in each of the vertical directions of the ultrasonic seal 106.

As shown in FIG. 6A, in the heater bar 62, the seal forming surface is not flat, and the center of the seal width direction (vertical direction) is the film Fc over the entire length in the seal length direction (horizontal direction). It slightly protrudes (tilts) toward it.
By sandwiching the film Fc between the heater bar 62 and the heater receiving bar 63 while the content X is charged into the film Fc, the content X is divided in the vertical direction. At this time, since the seal forming surface of the heater bar 62 is slightly inclined in the vertical direction, the content X is pushed out in the vertical direction. That is, the heater bar 62 removes the content X from the portion forming the preheat seal 105. Therefore, almost no impurities (contents X) remain on the preheat seal 105.
Therefore, when the ultrasonic seal portion 65 applies ultrasonic waves to the preheat seal 105, it is possible to prevent impurities from foaming (steam explosion) and causing sealing defects such as pinholes and cracks.

As shown in FIG. 6B, the anvil bar 67 is not a single plane but a pair of parallel strips extending in the seal length direction (left-right direction). The anvil bar 67 has a non-seal forming region 68 in the center in the seal width direction (vertical direction). The width of the non-seal forming region 68 is, for example, 1 mm. The width of the non-seal forming region 68 is preferably 20% or less of the width of the anvil bar 67.
As a result, when the ultrasonic seal portion 65 is superposed on the preheat seal 105 to form the ultrasonic seal 106, the preheat seal 105 extending in the seal length direction remains in the center in the seal width direction. Since the preheat seal 105 corresponds to the non-seal forming region 68, the seal width is 1 mm.

The non-seal forming region 68 is provided at the center of the ultrasonic seal 106 in the seal width direction so that when the side seal 104 is cut by the cutter portion 70, impurities are not exposed on the cut surface. Even if the contaminants remain on the preheat seal 105, when the preheat seal 105 is gripped (pressed) by the horn bar 66 and the anvil bar 67, the contaminants move so as to avoid the horn bar 66. That is, impurities move to the non-seal forming region 68 of the anvil bar 67. Therefore, no contaminants remain on the ultrasonic seal 106.
Therefore, even if the side seal 104 (ultrasonic seal 106) is cut by the cutter portion 70 in the subsequent process, impurities are not exposed on the cut surface. Therefore, it is possible to prevent the film packaging bag 100 from being contaminated with impurities (mold generation, etc.). In addition, contamination of the cutter portion 70 (cutter 71) can be prevented.

The horizontal seal portion 60 does not include a cooling portion for cooling the preheat seal 105. That is, the cooling unit is not provided on the downstream side of the preheat seal unit 61. This is because the ultrasonic seal unit 65 functions as a cooling unit for cooling the preheat seal 105.
Since the horn bar 66 and the anvil bar 67 are each made of metal, the temperature is lower than that of the film Fc. Further, cooling water is supplied to the inside of the anvil bar 67 to cool it. Therefore, when the film Fc is sandwiched between the horn bar 66 and the anvil bar 67, the heat of the film Fc (preheat seal 105) is taken away and cooled. Moreover, since the heating time of the preheat seal portion 61 is short, the ultrasonic seal portion 65 can rapidly cool and solidify the preheat seal 105.
As described above, since the horizontal seal portion 60 does not require a cooling portion, the vertical bag-making filling and packaging machine 1 can suppress the height of the apparatus as before.

[Cutter part 70]
The cutter portion 70 has a cutter bar 71 and cuts the side seal 104 of the film Fc in the left-right direction (seal length direction). As a result, the bag body Fa formed at the lower end of the film Fc is cut off from the film Fc. The film packaging bag 100 containing the contents is individually cut off.

The cutter portion 70 cuts the center of the side seal 104 in the vertical direction in a strip shape.
As described above, the lateral seal portion 60 forms a side seal 104 in which three preheat seals 105 and two ultrasonic seals 106 are alternately arranged. The cutter portion 70 completely cuts off the preheat seal 105 arranged between the two ultrasonic seals 106. At this time, the cutter portion 70 cuts the side seal 104 so as to cut off a part of each of the two ultrasonic seals 106.
Therefore, the side seal 104 of the film packaging bag 100 containing the contents has only the ultrasonic seal 106 on the outside (cut surface).
No cut surface is formed on the preheat seal 105 placed between the two ultrasonic seals 106. Therefore, even if the contaminants remain on the preheat seal 105 between the two ultrasonic seals 106, the cutter bar 71 is not contaminated with the contaminants.

In the vertical bag-making filling and packaging machine 1, since the horizontal sealing portion 60 includes the preheat sealing portion 61 and the ultrasonic sealing portion 65, the drawbacks of ultrasonic welding are temporarily fixed by heat welding while taking advantage of ultrasonic welding. When the preheat seal portion 61 that can be supplemented forms the preheat seal 105, the film F is softened, so that the ultrasonic seal portion 65 can form the ultrasonic seal 106 in a short time.
Even if there is a step in the thickness direction at the portion where the ultrasonic seal portion 65 forms the ultrasonic seal 106, the film F is softened by the preheat seal portion 61 forming the preheat seal 105, and the step is eliminated. Therefore, the ultrasonic seal portion 65 can satisfactorily form the ultrasonic seal 106.
The horizontal seal portion 60 forms a side seal 104 in a state where the film Fc is filled with the content X (seal in liquid). In such a case, the ultrasonic seal 106 is likely to have a defective seal or a broken edge. However, since the preheat seal portion 61 forms the preheat seal 105 before the ultrasonic seal portion 65 forms the ultrasonic seal 106, it is difficult for a seal defect or edge breakage to occur.
Since the preheat seal portion 61 forms the preheat seal 105, impurities are less likely to remain in the portion (preheat seal 105) where the ultrasonic seal portion 65 forms the ultrasonic seal 106. Therefore, when the ultrasonic seal portion 65 forms the ultrasonic seal 106, foaming of impurities (steam explosion) does not occur, and there is little possibility of sealing failure such as pinholes and cracks.
Therefore, the vertical bag-making filling and packaging machine 1 can improve the forming efficiency and quality stability of the film packaging bag 100 (side seal 104).

[Manufacturing method of film packaging bag 100 containing contents]
Next, a process of manufacturing the film packaging bag 100 containing the contents by using the vertical bag-making filling and packaging machine 1 will be described.

<Film transport process S1, bag making guide process S2>
First, the film F is unwound from the roll supported by the film shaft 3, and is intermittently conveyed toward the bag making guide portion 10 by the film conveying portion 50.
Then, the film F is divided into two in the width direction by passing through the bag making guide portion 10, and is further folded in half.

<Vertical sealing process S3>
Next, the film F is sent to the vertical sealing portion 20. In the vertical seal portion 20, the film F first forms a bottom seal 101 and a bottom reinforcing seal 102 by the bottom seal portion 21 and the bottom reinforcing seal portion 22.
After that, the film F is fed downward via the guide roller 23.
Further, the film F is sent to the top seal portion 24 to form the top seal 103. As a result, the film F becomes tubular (film Fc).
The film heating conditions in the vertical seal portion 20 (bottom seal portion 21, bottom reinforcing seal portion 22, top seal portion 24) are, for example, a heating temperature of 130 ° C. and a heating time of 0.7 seconds.
After that, the film Fc is sent to the top cooling unit 25, and the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103 are cooled and solidified.

<Design cut process S4>
Next, the film Fc is sent to the design cutter unit 40, and the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103 are cut into a predetermined shape. That is, the shapes of the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103 are arranged.

<Filling step S5>
Next, the film Fc is sent to the filling portion 30 (the tip of the charging pipe 31) to be filled with the content X which is a fluid.

<Horizontal sealing process S6>
Next, the film Fc is further sent downward to be sealed by the lateral sealing portion 60. The film Fc is sealed in the horizontal seal portion 60 in the left-right (longitudinal) direction to form the side seal 104.

<Preheat sealing process S61>
In the horizontal seal portion 60, first, the film Fc is sent to the preheat seal portion 61 to form the preheat seal 105.
The film heating conditions in the preheat seal portion 61 are, for example, a heating temperature of 130 ° C. and a heating time of 0.4 seconds. The film heating conditions differ depending on the type of film and the filling material.
The film heating time of the preheat sealing portion 61 is shorter than the film heating time of the vertical sealing portion 20 of 0.7 seconds. Therefore, the preheat seal 105 has a lower welding strength than the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103. The preheat seal 105 functions as a temporary fixing.

By forming the preheat seal 105 on the film Fc, the content X filled in the film Fc is divided into upper and lower parts with the preheat seal 105 as a boundary.
The heater bar 62 of the preheat seal portion 61 has a seal forming surface slightly inclined in the vertical direction. Therefore, the content X is pushed up and down. Therefore, almost no impurities (contents X) remain on the preheat seal 105.
Further, by forming the side seal 104 on the film Fc, the bag body Fa appears at the lower end of the film Fc. The contents X are enclosed (full-filled) in this bag body Fa.

<Ultrasonic sealing process S62>
At the lateral seal portion 60, the film Fc is subsequently sent to the ultrasonic seal portion 65 to form the ultrasonic seal 106.
The ultrasonic seal 106 is formed so as to be superimposed on the preheat seal 105. The ultrasonic seal 106 is formed by further applying ultrasonic waves to the preheat seal 105 and welding the preheat seal 105.
The ultrasonic seal portion 65 sufficiently welds the films F to each other when forming the ultrasonic seal 106. The vibration conditions in the ultrasonic seal unit 65 are, for example, a frequency of 30 kHz and a vibration time of 0.3 seconds.
Thereby, the film Fc is completely sealed by the side seal 104.

In this way, the lateral seal portion 60 forms the side seal 104 in which the three preheat seals 105 and the two ultrasonic seals 106 are alternately arranged.
Even if impurities remain on the preheat seal 105 formed by the preheat seal portion 61, when the anvil bar 67 grips (presses) the preheat seal 105, the impurities move so as to avoid the anvil bar 67. Therefore, no contaminants remain on the ultrasonic seal 106.
Therefore, when the side seal 104 (ultrasonic seal 106) is cut by the cutter portion 70 in the subsequent process, no impurities appear on the cut surface.

The side seal 104 is not cooled and solidified by the cooling unit like the top seal 103 and the like. This is because the ultrasonic seal unit 65 functions as a cooling unit for cooling the preheat seal 105.
Since the horn bar 66 and the anvil bar 67 are made of metal, the temperature is lower than that of the film Fc. Further, cooling water is supplied to the inside of the anvil bar 67 to cool it. Therefore, when the horn bar 66 sandwiches the film Fc, it takes heat from the film Fc (preheat seal 105) and cools the film Fc. Moreover, since the heating time of the preheat seal portion 61 is short, the horn bar 66 can rapidly cool the preheat seal 105.
As described above, the manufacturing efficiency of the film packaging bag 100 containing the contents can be improved without requiring time for cooling the preheat seal 105.

<Detachment step S7>
Next, the film Fc is further sent downward, and the side seal 104 is cut by the cutter portion 70.
The cutter portion 70 cuts the side seal 104 in the left-right direction by the cutter bar. As a result, the bag body Fa formed at the lower end of the film Fc is cut off from the film Fc. That is, the film packaging bag 100 containing the contents is individually cut off.

The cutter portion 70 cuts the center of the side seal 104 in the vertical direction in a strip shape. The cutter portion 70 completely cuts off the preheat seal 105 arranged between the two ultrasonic seals 106. Further, the cutter portion 70 cuts a part of each of the two ultrasonic seals 106.
Even if impurities remain in the preheat seal 105 between the two ultrasonic seals 106, the cutter bar of the cutter portion 70 is not contaminated with the impurities.
Therefore, the side seal 104 of the film packaging bag 100 containing the contents has only the ultrasonic seal 106 as the measuring end (cut surface).

In the method for manufacturing the film packaging bag 100 containing contents, the horizontal sealing step S6 includes a preheat sealing step S61 and an ultrasonic sealing step S62. Therefore, while taking advantage of ultrasonic welding, the shortcomings of ultrasonic welding can be compensated for by heat welding of temporary fixing.
Since the film F (preheat seal 105) is softened by passing through the preheat seal step S61, the ultrasonic seal 106 can be formed in a short time in the ultrasonic seal step S62.
Even if there is a step in the thickness direction at the portion where the ultrasonic seal 106 is formed, the film F is softened by forming the preheat seal 105 in the preheat seal step S61, and the step is eliminated. Therefore, the ultrasonic seal 106 can be satisfactorily formed in the ultrasonic seal step S62.
In the lateral sealing step S6, the side seal 104 is formed in a state where the film Fc is filled with the fluid (content X) (seal in liquid). In such a case, the ultrasonic seal 106 is likely to have a defective seal or a broken edge. However, since the preheat seal 105 is formed in the preheat seal step S61 prior to forming the ultrasonic seal 106 in the ultrasonic seal step S62, sealing defects and edge breakage are less likely to occur.
By forming the preheat seal 105, impurities are less likely to remain on the portion (preheat seal 105) where the ultrasonic seal 106 is formed. Therefore, foaming of impurities (steam explosion) does not occur when the ultrasonic seal 106 is formed, and there is little possibility of sealing failure such as pinholes and cracks.
Therefore, in the above-mentioned manufacturing method, the formation efficiency and quality stability of the film packaging bag 100 (side seal 104) can be improved.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above-described embodiments, and any modification is possible within the scope of the technical idea of the present invention.

For example, the case where the bag making guide portion 10 divides the film F into two has been described, but the present invention is not limited to this.
The bag making guide portion 10 may divide the film F into three or more parts, and manufacture the package from each of the three parts or more. Further, the case may be used in which the package is manufactured without dividing the film F.

Further, the case of manufacturing a standing pouch type package has been described, but the present invention is not limited to this. It may be a case of manufacturing a four-sided seal type package having no gusset portion 100a.
Not limited to the four-way seal type, a three-way seal type, a two-way seal type, or a pillow bag having a back seal may be used.

1 Vertical bag making filling and packaging machine 20 Vertical sealing part 30 Filling part 50 Film transport part 60 Horizontal sealing part 61 Preheat sealing part 62 Heater bar 65 Ultrasonic sealing part 66 Horn bar 67 Anvil bar 68 Non-seal forming area 70 Cutter part 100 Contents Film packaging bag with goods 101 Bottom seal (seal part, second seal, vertical seal) 102 Bottom reinforcement seal (seal part, second seal, vertical seal) 103 Top seal (seal part, second seal, vertical seal) 104 Side seal (Seal part, second seal, horizontal seal) 105 Preheat seal 106 Ultrasonic seal F film Fc film (tube film) Fa bag X contents (fluid)

Claims (14)

It is a film packaging bag containing contents, in which a fluid is enclosed in a film packaging bag formed by welding films to each other.
A preheat seal in which the films are heat welded together,
An ultrasonic seal in which the preheat seal is further ultrasonically welded,
It has a first seal, which consists of,
The ultrasonic seal is a film packaging bag containing contents, which is narrower than the preheat seal. The film packaging bag containing the contents according to claim 1, wherein the width of the ultrasonic seal is 50 to 90% of the width of the preheat seal. The first seal is
The ultrasonic seal and the preheat seal are superposed on the outside of the film packaging bag.
The film packaging bag containing the contents according to claim 1 or 2 , wherein only the preheat seal is arranged inside the film packaging bag. The film packaging bag containing the contents according to any one of claims 1 to 3 , wherein the first seal is arranged on opposite side sides of the outer circumference of the film packaging bag. It has a second seal consisting only of a heat seal in which the films are heat-welded to each other.
The film packaging bag containing the contents according to any one of claims 1 to 4, wherein the preheat seal has a lower heat seal strength than the second seal. It is a vertical bag-making filling and packaging machine that creates a film packaging bag and encloses a fluid.
A film transport section that transports the tube film downward,
A filling part for charging the fluid inside the tube film,
A horizontal seal portion that welds the tube film over the width direction to form a bag body,
A cutter portion that separates the bag from the tube film,
Equipped with
The horizontal seal portion is
A preheat seal portion that heats and welds the tube film, and
An ultrasonic seal portion that further applies ultrasonic waves to the preheat seal formed by the preheat seal portion to weld it, and an ultrasonic seal portion.
Equipped with
The ultrasonic sealing portion is a vertical bag-making filling / packaging machine characterized in that the sealing width is narrower than that of the preheat sealing portion. The vertical bag-making filling and packaging machine according to claim 6 , wherein the ultrasonic seal portion further cools and solidifies the preheat seal. One of claims 6 or 7 , wherein the ultrasonic seal portion is formed so that the ultrasonic seal is symmetrically superimposed on the preheat seal formed by the preheat seal portion in the vertical direction. The vertical bag-making filling and packaging machine described in the section. The vertical bag-making filling package according to any one of claims 6 to 8 , wherein the ultrasonic seal portion has a non-seal forming region extending in the seal length direction at the center in the seal width direction. Machine. The vertical bag-making filling and packaging machine according to claim 9 , wherein the cutter portion cuts a portion of the horizontal seal formed by the horizontal seal portion corresponding to the non-seal forming region. It is provided with a vertical sealing portion that heat-welds strip-shaped films to each other to form the tube film.
The vertical bag-making filling and packaging machine according to any one of claims 6 to 10, wherein the heating time of the preheat sealing portion is shorter than the heating time of the vertical sealing portion. It is a method of manufacturing a film wrapping bag containing contents by making a film wrapping bag and enclosing a fluid.
The film transport process that transports the tube film downward, and
A filling step of filling the inside of the tube film with a fluid, and
A horizontal sealing process in which the tube film is welded over the width direction to form a bag body,
A cutting step of separating the bag body from the tube film, and
Have,
The horizontal sealing step is
A preheat sealing process in which the tube film is heated and welded, and
An ultrasonic sealing process in which ultrasonic waves are further applied to the preheat seal formed in the preheat sealing step to weld it, and
A method for manufacturing a film packaging bag containing contents, which comprises. The method for manufacturing a film packaging bag containing contents according to claim 12, wherein the ultrasonic seal formed in the ultrasonic seal step has a narrower width than the preheat seal formed in the preheat seal step. It has a vertical sealing process in which strip-shaped films are heat-welded to each other to form the tube film.
The method for producing a film packaging bag containing contents according to claim 12 or 13, wherein the preheat seal formed in the preheat seal step has a lower heat seal strength than the vertical seal formed in the vertical seal step.

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