JP2022041082A - Ultrasonic sealing method of packaging film and packaging machine - Google Patents

Abstract

To provide a method of forming a sealing part having a predetermined traveling direction length by an ultrasonic sealing method, and to provide a packaging machine using the method.SOLUTION: In a method, continuously traveling two overlapped long packaging films are held between a horn vibrating with ultrasonic waves and an anvil arranged opposing to the horn, and the packaging films are welded with each other by the frictional heat by the vibration of the horn. The opposing horn and the anvil have a horizontal direction length surpassing the full width of the packaging film respectively. The horn and/or the anvil are/is moved in a direction mutually approaching with respect to the continuously traveling packaging films, or the horn and the anvil are fixed adjacently, and in an adjacent position of the horn and the anvil, the traveling packaging films are welded with each other continuously in a traveling direction by the ultrasonic vibration by the horn. Thereby, a sealing part is formed having a predetermined traveling direction length.SELECTED DRAWING: Figure 2

Description

In the present invention, two overlapping long packaging films that run continuously are interposed between a horn that vibrates ultrasonically and an anvil that is arranged facing the horn, and the packaging films are put together. The present invention relates to an ultrasonic sealing method for welding by vibration of the horn and a packaging machine using the ultrasonic sealing method.

Conventionally, a long soft packaging film is molded into a bag shape and filled with liquids such as foods and drinks, seasoning liquids, pharmaceuticals and cosmetics, viscous substances or powders, granules, and other objects to be packaged. As an apparatus for continuously manufacturing a package, a vertical filling and packaging machine as in Patent Document 1 is known. In this vertical filling and packaging machine, a strip-shaped packaging film is folded in two, and the overlapping side edges are continuously sealed in the traveling direction of the packaging film to form a tubular shape, and the tubular shape. The packaged film is provided with a horizontal seal roll that seals the packaged film over the entire width at regular intervals while filling the object to be packaged to form a horizontal seal portion.

In such a filling and packaging machine, when the packaging films are fused and joined, a sealing plate is provided on the peripheral surfaces of the pair of sealing rolls, and two packaging films that are overlapped by the facing sealing plates are sandwiched and heated. The so-called heat-sealing method, in which the packaging films are fused and joined to each other by pressurizing the film, is widely adopted.

On the other hand, in the automatic packaging machine of Patent Document 2, the vibrator is vibrated by an ultrasonic oscillator, the vibration is amplified and transmitted to the horn, and the packaging film is formed by the tip portion of the horn and the anvil (cradle). An ultrasonic sealing method is adopted in which the packaging film is sandwiched and heat-welded by frictional heat due to ultrasonic vibration and pressure.

Japanese Unexamined Patent Publication No. 2005-96849 Japanese Unexamined Patent Publication No. 2007-269377

Compared to the heat sealing method, the ultrasonic sealing method does not cause heat damage to the packaged object, and the packaged object intervening at the sealing position can be eliminated by ultrasonic vibration. Therefore, the packaged object inside the sealed portion. There is an advantage that the packaging film can be heat-welded while preventing the biting of the wrapping film. In addition, it can be suitably used for thick packaging materials and materials that do not easily generate heat, which cannot be sealed by the heat sealing method, and it is extremely excellent in that it can reduce running costs because it consumes less power. ing.

However, when trying to form a smooth sealing part with a large area by the ultrasonic sealing method, the pressure may be dispersed and it may not be possible to seal as expected, and if the pressure is increased, a high load will be applied to the vibration oscillator. Usually, the length of the packaging film of the packaging film formed by the ultrasonic seal (hereinafter referred to as "seal length") is about 1 to 2 mm because the seal is stopped.
Therefore, it is difficult to adopt the ultrasonic sealing method in a packaging machine for packed packages of liquid materials that require particularly high bag breaking strength, and continuously manufactured packages as in Patent Document 1 can be used. The seal length of the seal part is too short (1 to 2 mm) to separate it into individual packages, and it is very difficult to cut at the center position. There is.

Therefore, various methods for forming a seal portion having a long seal length by an ultrasonic seal method have been conventionally studied. For example, the surface of a horn or anvil is knurled (mesh-like or the like) to increase the contact area. It has been proposed to reduce the amount to form a seal portion having a long seal length. However, in this method, the packaged object enters between the knurls (mesh) at the time of welding and is bitten into the sealed portion, and when the sealed portion is cut, the bitten packaged object exudes. There are problems such as accumulation of dirt on the cutting blade, rusting, and contamination of other packages.

Further, in the packaging machine of Patent Document 2, after the packaging film is moved downward while being sandwiched by the lateral heat sealer (horn and anvil) of the lateral sealing mechanism, the lateral sealing mechanism is returned and operated upward by one packaging bag. It is a so-called box motion type packaging machine that intermittently fills and wraps the packaged object by performing horizontal sealing again. If the production efficiency of the packaging bag is poor and the packaged object is a liquid substance, The liquid material intervening in the horizontal seal position could not be squeezed out, and the liquid material was caught in the horizontal seal portion, which may cause a seal failure.

Therefore, it is an object of the present invention to provide a method for forming a sealing portion having a predetermined sealing length for a packaging film that continuously travels by an ultrasonic sealing method, and a packaging machine using the method. In particular, it is an object of the present invention to form a sealed portion having a predetermined seal length while continuously filling the packaged film into the packaged film and preventing the object to be bitten.

In the study for the realization of the above-mentioned purpose, the inventor described two overlapping long films running continuously between a horn that vibrates ultrasonically and an anvil arranged facing the horn. In a method in which a wrapping film is sandwiched and the wrapping films are welded to each other by frictional heat due to the vibration of the horn, the facing horn and anvil each have a lateral length exceeding the entire width of the wrapping film. Then, the horn and / or the anvil is moved in a direction close to each other with respect to the continuously traveling packaging film, or the horn and the anvil are fixed in close proximity to the horn and the anvil. A packaging film characterized by forming a sealing portion having a predetermined traveling direction length by continuously welding the packaging films traveling at a position to each other in the traveling direction by ultrasonic vibration by the horn. After finding out that the ultrasonic sealing method is effective, he came to develop this invention.

In the ultrasonic sealing method of the present invention,
(1) The horn and the anvil have a structure that can rotate in opposite directions.
(2) At least one of the horn and the anvil is rotationally driven to assist the traveling of the packaging film.
(3) At least one of the horn and the anvil is of a non-rotating type, and an assist roll is provided at least downstream of the horn and the anvil to assist the continuous running of the packaging film.
(4) An assist roll is further provided at an upstream position of the facing horn and anvil to assist the continuous running of the packaging film.
Is a more preferred solution.

Further, in the present invention, the packaging film that runs continuously in the longitudinal direction is folded back at the central portion so that the adhesive layer or the sealant layer faces each other, and the side edge portion thereof is continuously running in the running direction of the packaging film. The vertical sealing means for forming the vertical sealing portion to form a tubular shape, and the full width of the packaging film in the direction orthogonal to the traveling direction of the packaging film while filling the tubular packaging film with the object to be packaged. In a packaging machine including a horizontal sealing means that extends over a wrapping film and forms a horizontal sealing portion at intervals in the traveling direction of the packaging film to form a package, the horizontal sealing means sandwiches the packaging film. A horn that vibrates ultrasonically and has a lateral length exceeding the full width of the packaging film, and an anvil that is arranged so as to face the horn, and the horn and / or the anvil runs continuously. The horn and the anvil are fixed in close proximity to each other, or the horn and the anvil are fixed in close proximity to the packaging film, and the horn and the anvil are in close proximity to each other when the lateral seal portion is formed. The packaging is characterized in that the packaging films are continuously welded to each other in the traveling direction by ultrasonic vibration from the horn to form a horizontal sealing portion having a predetermined traveling direction length. Propose an opportunity.

In the packaging machine of the present invention, it should be noted.
(1) The horn and the anvil have a structure that can rotate in opposite directions.
(2) The horn and the anvil are made of at least one non-rotating type, and have an assist roll at least downstream of the horn and the anvil to assist the continuous running of the packaging film.
(3) Further providing an assist roll at the upstream position of the facing horn and anvil.
(4) The vertical sealing means comprises an ultrasonic sealing device including a horn that vibrates ultrasonically and an anvil arranged so as to face the horn.
Is a more preferred solution.

According to the method for ultrasonically sealing a packaging film of the present invention, two packaging films running continuously between a horn and an anvil arranged facing the horn are ultrasonically vibrated by the horn. However, since the horn and the anvil can be slid and welded continuously in the traveling direction, a seal portion having a longer seal length than the conventional one can be formed without overloading. Moreover, even when sealing while continuously filling the packaging film with the object to be packaged, it is possible to eliminate (shake off) the object to be packaged at the sealing position by ultrasonic vibration from the horn, so that the packaged material can be shaken off into the sealing portion. It is possible to effectively prevent biting of the packaged object.

According to the packaging machine of the present invention, the packaging can be continuously produced while filling the object to be packaged by the ultrasonic sealing method, so that the production efficiency is excellent and the packaging film can be welded in a short time. Therefore, the power consumption can be reduced and the running cost can be reduced. Further, even a thick material such as a CPP film for retort pouch or a material such as a monomaterial (PE single material, PET single material), which is difficult to join by the heat sealing method, can be welded.

It is a schematic diagram which shows one Embodiment of the packaging machine of this invention. It is a figure explaining one Embodiment of the ultrasonic sealing method of this invention, (a) is a figure which shows the state of the horn and anvil at the time of (b) at the time of horizontal sealing, (c) at the end of horizontal sealing. Is. It is a schematic diagram which shows the other embodiment of the packaging machine of this invention. It is a figure explaining another embodiment of the ultrasonic sealing method of this invention, (a) is before the horizontal seal, (b) is at the start of horizontal seal, (c) is in the middle of horizontal seal, (d) is horizontal seal. It is a figure which shows the state of a horn and an anvil at the end.

Hereinafter, embodiments of the present invention will be described with reference to those shown in the drawings.
FIG. 1 is a schematic view showing the configuration of a vertical filling / packaging machine 1 as an embodiment of the packaging machine of the present invention, in which the filling / packaging machine 1 is a package filled with an object to be packaged such as a liquid material. Is configured to be continuously manufactured. The present invention is not limited to the vertical filling / packaging machine shown in FIG. 1, and is suitable for various packaging machines such as a vertical pillow type packaging machine, a horizontal pillow type packaging machine, and a multi-row filling / packaging machine. Can be used for. Further, as the packaged material, liquid or viscous or jelly-like, powdery granules, solid-like fluid substances such as foods and drinks, seasonings, pharmaceuticals, cosmetics and the like can be preferably used.

In the figure, R is a packaging film in which a packaging film is wound, and 10 is a packaging film sent out from the original roll R. For example, from a biaxially stretched ethylene-vinyl alcohol copolymer resin or the like. It is composed of a laminated film obtained by laminating a base film layer made of, for example, a sealant layer made of an unstretched ethylene-vinyl acetate copolymer resin or the like.

While running this long packaging film 10 in the longitudinal direction, the film folding portion 20 is folded back in the width direction so that the sealant layers face each other, and both side edges thereof are overlapped with each other. Both side edge portions are continuously vertically sealed in the longitudinal direction by the vertical seal portion forming portion 21 to form the vertical seal portion 11 to form a tubular shape.

Next, the packaged body P manufactured by the horizontal seal portion forming portion 23 while continuously filling the packaged object M from the nozzle 22 for supplying the packaged object into the tubular packaging film 10'. While squeezing out the object to be packaged M at regular intervals according to the length of the bag, the tubular packaging film 10'is fused and joined over the entire width to form the horizontal sealing portion 12.

Subsequently, the horizontal seal portion 12 is sandwiched and cooled again by the cooling unit 25 composed of a pair of horizontal seal rolls, and the joint is fixed to fix the joint, thereby making a large number of packages P and each package P. The object to be packaged M is automatically filled and packaged inside. In the package P manufactured as described above, the horizontal sealing portion 12 is cut at the center position in the traveling direction of the packaging film 10'by the cutting portion 26, and the package P is shipped as a single package or a plurality of packages at a time. Become.

In the filling and packaging machine 1 having such a configuration, the horizontal seal portion forming portion 23 is composed of an ultrasonic sealing device, and as shown in FIG. 2, the frequency generated from the vibration oscillator (not shown) exceeds 20 kHz or more. The horn 30 that resonates the sonic energy and transmits it to the tip portion is arranged so as to face each other with the horn 30 and the packaging film 10'sandwiched from each other, and receives the pressing force of the horn 30 to generate stress on the horn 30. It is equipped with an anvil 31 to be made to.

The horn 30 and the anvil 31 have a lateral length that exceeds the full width of the cylindrical packaging film 10'to be sealed, and in FIG. 2, as an embodiment, both the horn 30 and the anvil 31 are provided by a rotatable roller. It is configured.

A method of forming the horizontal seal portion 12 by the horizontal seal portion forming portion 23 (horn 30 and anvil 31) will be described with reference to FIG. 2.
FIG. 2A is a diagram showing a state of the horn 30 and the anvil 31 before the formation of the horizontal seal portion 12. The pair of horns 30 and anvil 31 are configured so that the horns 30 and / or the anvil 31 can be moved closer to and away from each other (front-back direction) by, for example, an air cylinder (not shown), or the horn 30 and the anvil 31. Is placed (fixed) close to each other with the packaging film 10'sandwiched. In this embodiment, a case where only the horn 30 is configured to be movable will be described as an example.

FIG. 2B is a diagram showing a state of the horn 30 and the anvil 31 when the horizontal seal portion 12 is formed. At the start of formation of the lateral seal portion 12, the horn 30 moves (advances) in a direction close to the anvil 31, and the packaging film 10'is sandwiched between the horn 30 and the anvil 31. As a result, at the pinching position, the packaging film 10'is welded by the frictional heat generated by the ultrasonic vibration of the horn 30, and the lateral sealing portion 12 is instantly formed.

At this time, both the horn 30 and the anvil 31 have a roll shape and rotate in opposite directions with each other sandwiching the packaging film 10', so that the holding position of the packaging film 10'is continuous (in accordance with the rotation). It can be welded sequentially), and as shown in an enlarged view in the figure, it is possible to form a horizontal sealing portion 12 which is long in the traveling direction of the packaging film 10'.

Further, since the horn 30 and the anvil 31 both have a roll shape and rotate along the traveling direction of the packaging film 10', the frictional resistance with the packaging film 10'can be reduced, and the traveling packaging film 10 can be reduced. 'Can be smoothly sent downstream while sliding between the horn 30 and the anvil 31.

Further, the horn 30 and the anvil 31 can function as a transport assisting means for the packaging film 10'by rotating at least one of them, and the lateral seal portion having the expected seal length and strength. 12 can be formed.

When the lateral seal portion 12 is formed to have a predetermined length, the horn 30 moves (reverses) in the direction away from the anvil 31 and returns to the original position as shown in FIG. 2 (c), and the lateral seal portion 12 The formation of is completed.

Next, another embodiment of the packaging machine of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram showing the configuration of a vertical filling / packaging machine 1 as the packaging machine of the present embodiment, and FIG. 4 is a method of ultrasonically sealing the filling / packaging machine 1 of FIG. 3 with a horizontal seal portion forming portion 23. It is a figure explaining. In addition, only the part different from the said embodiment will be described, and the same reference numerals are given to the same configuration, and detailed description thereof will be omitted.

The horizontal seal portion forming portion 23 is composed of an ultrasonic device including a horn 30 and an anvil 31 as shown in FIG. 4, and as shown in the figure, the horn 30 is a non-rotating type and is used for sealing in a tubular shape. The film has a lateral length exceeding the entire width of the film 10', and the tip portion 30a has a flat shape and is tapered toward the tip portion 30a so that ultrasonic energy is concentrated. On the other hand, the anvil 31 has a roll shape and has the same lateral length as the tip portion 30a of the horn 30.

The horn 30 and the anvil 31 may have any shape as long as the packaging film 10'can be sandwiched. For example, the anvil 31 may have an anvil 31 having substantially the same shape as the horn 30 and having a flat tip portion. It can also be formed.

By the way, when at least one of the horn 30 and the anvil 31 is made of a non-rotating type as in the present embodiment (in the figure, the horn 30 is made of a non-rotating type), it is packaged by being sandwiched by the horn 30 and the anvil 31 at the time of horizontal sealing. The transport of the packaging film 10'is hindered, and the traveling of the packaging film 10'is hindered, which may cause meandering or wrinkles. Therefore, as shown in the figure, by providing an assist roll 24 that assists the transport of the packaging film 10'at the downstream position of the horn 30 and the anvil 31, the assist roll 24 transfers the packaging film 10'to the downstream. Is smooth, and the film can be fed out at a desired film transport speed. The pair of assist rolls 24 are driven and controlled in synchronization with the feeding speed of the packaging film 10'so as to have a required transport speed, and the feeding speed of the packaging film 10'is, for example, the top of the filling and packaging machine. The speed of the packaging film 10 is actually measured by an encoder provided on the roll 27, and the vertical seal roll 21 is driven and controlled so as to have a desired feed speed.

FIG. 4A is a diagram showing a state of the horn 30 and the anvil 31 before the formation of the horizontal seal portion 12. The horn 30 and / or the anvil 31 is configured to be movable in directions close to and separated from each other by an air cylinder (not shown), and in this embodiment, only the horn 30 is configured to be movable.

FIG. 4B is a diagram showing a state of the horn 30 and the anvil 31 at the start of formation of the horizontal seal portion 12. At the start of formation of the lateral seal portion 12, the horn 30 moves (advances) in a direction close to the anvil 31, and the packaging film 10'is sandwiched between the horn 30 and the anvil 31. As a result, the packaging film 10'is instantly welded by the frictional heat generated by the ultrasonic vibration of the horn 30 at the holding position.

As shown in FIG. 4C, the packaging film 10'is sandwiched between the horn 30 and the anvil 31 and slides downward by a pair of assist rolls 24 provided at a downstream position of the lateral seal portion forming portion 23. Be pulled out. Therefore, as the packaging film 10'runs, its sandwiching position is continuously (sequentially) welded, and as shown in an enlarged view in the figure, a horizontal seal portion 12 long in the traveling direction of the packaging film 10'is formed. To.

When forming the horizontal seal portion 12, the packaging film 10'is assisted by the assist roll 24 as described above, and is tensioned by the brake roll (original roll R or the like) provided at the upstream position in the traveling direction. Since the film is in a tense state (a state in which the film is not loosened), the horn 30 and the anvil 31 do not hinder the traveling, and the film is smoothly conveyed.

When the lateral seal portion 12 is formed to have a predetermined length, the horn 30 moves (reverses) in the direction away from the anvil 31 and returns to the original position as shown in FIG. 4 (d), and the lateral seal portion 12 The formation of is completed.

It is preferable that the pair of assist rolls 24 are provided so as to sandwich at least the side end portion of the tubular packaging film 10'on the vertical sealing portion 11 side. The material of the assist roll 24 is not particularly limited, but for example, rubber lining, fluororubber, urethane rubber, iron, stainless steel, or the like can be used.

When the assist roll 24 is provided so as to sandwich both ends of the tubular packaging film 10', it corresponds to a horizontal seal and while sandwiching both ends of the packaging film 10'with the assist roll 24, respectively. By pulling it downward, the packaging film 10'at the horizontal seal position can be put into a tense state, wrinkles and the like can be suppressed from occurring in the horizontal seal portion 12, and the seal failure such as liquid leakage can be prevented. It can be prevented from occurring.

Further, when the horizontal seal portion 12 is formed, the packaged object is continuously filled in the tubular packaging film 10', but the packaged object is squeezed out by the horn 30 and the anvil 31 at the horizontal seal position. At the same time, since it is eliminated (shaken off) by the vibration of the horn 30, it is possible to suppress the object to be packaged from being caught in the horizontal seal portion 12, and it is possible to effectively prevent the occurrence of a seal defect. can.

The seal length of the horizontal sealing portion 12 (the length in the traveling direction of the packaging film 10') is such that the continuously manufactured package P is cut by the cutting portion 26 at the center portion of the packaging film 10'in the traveling direction. It is preferably 2.4 mm or more, more preferably 2.4 to 30 mm, so as to have a required seal length, from the viewpoint of misalignment and the strength of the bag breaking when the single package P is used. , The transport speed of the packaging film 10', the holding time of the packaging film 10' by the horn 30 and the anvil 31, the ultrasonic transmission time of the horn 30, and the like are appropriately determined.

The assist roll 24 may be provided not only at the downstream position of the horizontal seal portion forming portion 23 but also at the upstream position. In this case, for example, in the assist roll 24 on the upstream side, the packaging film 10 has a desired traveling speed. On the other hand, the assist roll 24 on the downstream side has a higher rotation speed than the assist roll 24 on the upstream side, and the packaging film 10'is pulled out downward. By setting the setting, it is possible to suppress the occurrence of wrinkles, slacks, etc. by putting the packaging film 10'at the planned horizontal seal position in the horizontal seal portion forming portion 23 in a tense state, and the seal is defective due to the wrinkles, etc. of the horizontal seal portion 12. Can be effectively prevented.

In the above embodiment, the ultrasonic sealing method and the packaging machine of the present invention have been described as an example in which the object to be packaged is continuously filled and packaged in the packaging film 10'. When the packaged object is continuously filled and packaged, it is necessary to make at least one of the horn 30 and the anvil 31 movable, and to perform sealing while squeezing the packaged object by the horn 30 and the anvil 31. When not filling the packaging film 10'(when manufacturing a packaging bag in which the object to be packaged is unfilled), the horn 30 and the anvil 31 are fixed in close positions with the packaging film 10'sandwiched. In this case, by vibrating / stopping the horn 30 in accordance with the timing of the horizontal seal, the traveling packaging film 10'is placed at a predetermined position and has a predetermined traveling direction length. The horizontal seal portion 12 can be formed with.

Further, in the packaging machine 1 of the present invention, it is preferable that not only the horizontal seal portion forming portion 23 but also the vertical seal portion forming portion 21 is composed of an ultrasonic sealing device, for example, a thick packaging film (retort CPP film). ), Which is effective for packaging films whose filling speed cannot be increased by the conventional heat-sealing method, and can effectively improve the production efficiency.

In the above embodiment, the case of manufacturing a three-way seal type package is shown, but the present invention is not limited to the three-way seal type package, and various packages such as a four-way seal type and a back-attached seal type are used. It can be applied to the packaging machine of the body (packaging bag). Further, the ultrasonic sealing method of the present invention can be widely used not only for a package (packaging bag) but also for various containers using a packaging film and the like.

R Original roll P Package M Packaged object 1 Filling packaging machine 10, 10'Packaging film 11 Vertical sealing part 12 Horizontal sealing part 20 Film folding part 21 Vertical sealing part forming part 22 Packaged material supply part 23 Horizontal sealing part Forming part 24 Assist roll 25 Cooling part 26 Cutting part 27 Heavenly roll 30 Horn 31 Anvil

Claims (10)

Two overlapping long packaging films that run continuously are sandwiched between a horn that vibrates ultrasonically and an anvil that is arranged facing the horn, and the packaging films are placed between the horns. In the method of welding by frictional heat due to vibration of
The facing horns and anvils each have a lateral length that exceeds the full width of the packaging film.
The horn and / or the anvil is moved in a direction close to each other with respect to the continuously traveling packaging film, or the horn and the anvil are fixed in close proximity to the horn and the anvil at a position close to each other. Ultrasonic waves of a packaging film, characterized in that a sealing portion having a predetermined traveling direction length is formed by continuously welding the traveling packaging films to each other by ultrasonic vibration of the horn in the traveling direction. Sealing method. The ultrasonic sealing method for a packaging film according to claim 1, wherein the horn and the anvil have a structure that can rotate in opposite directions to each other. The ultrasonic sealing method for a packaging film according to claim 2, wherein at least one of the horn and the anvil is rotationally driven to assist the traveling of the packaging film. The first aspect of the present invention is characterized in that at least one of the horn and the anvil is of a non-rotating type, and an assist roll is provided at least downstream of the horn and the anvil to assist the continuous running of the packaging film. The ultrasonic sealing method for the packaging film described. The ultrasonic sealing method for a packaging film according to claim 4, wherein an assist roll is further provided at an upstream position of the facing horn and anvil to assist the continuous running of the packaging film. The packaging film that runs continuously in the longitudinal direction is folded back at the center so that the adhesive layer or the sealant layer faces each other, and a vertical seal portion is formed on the side edge portion thereof continuously in the running direction of the packaging film. Vertical sealing means to make it tubular and
While filling the tubular packaging film with the object to be packaged, it extends over the entire width of the packaging film in a direction orthogonal to the traveling direction of the packaging film, and is spaced apart from the traveling direction of the packaging film. A horizontal sealing means that forms a horizontal sealing portion to form a package, and
In a packaging machine equipped with
The lateral sealing means includes an ultrasonically vibrating horn that is positioned so as to sandwich the packaging film and has a lateral length exceeding the entire width of the packaging film, and an anvil that is arranged so as to face the horn.
The horn and / or anvil are configured to move in a direction that is close to or away from each other with respect to the continuously traveling packaging film, or the horn and anvil are fixed in close proximity to each other.
When the horizontal seal portion is formed, the packaging films are continuously welded to each other in the traveling direction by ultrasonic vibration from the horn at a position close to the horn and the anvil, thereby having a predetermined traveling direction length. A packaging machine characterized in that it forms a horizontal seal portion. The packaging machine according to claim 6, wherein the horn and the anvil have a structure that can rotate in opposite directions to each other. 6. The sixth aspect of claim 6, wherein at least one of the horn and the anvil is of a non-rotating type and has an assist roll at least downstream of the horn and the anvil to assist the continuous running of the packaging film. Packaging machine. The packaging machine according to claim 8, further comprising an assist roll at an upstream position of the facing horn and anvil. The one according to any one of claims 6 to 9, wherein the vertical sealing means comprises an ultrasonic sealing device including a horn that vibrates ultrasonically and an anvil arranged so as to face the horn. Packaging machine.

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