JP5463721B2 - Packaging container manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a packaging container, and more particularly to a method for manufacturing a packaging container including a funnel part fitted into an opening of a cylindrical container body.

  In general, powdered food products such as instant coffee are sold in a state of being filled in a highly sealed packaging container such as a bottle with a cap so that the hermeticity during storage can be maintained. There is also known a refill package in which the contents are simply packaged for the purpose of refilling the contents and reusing the storage container. For example, pouches and gusset bags are known as packaging containers for such refill packages, but in recent years, cups made of paper-based materials have been used from the viewpoint of resource saving and ease of disposal. In some cases, a shaped packaging container (hereinafter referred to as a “cup container”) is preferred.

  Patent Documents 1 to 3 describe a configuration in which a resin-made reinforcing ring is attached to an opening of a cup container in order to reinforce a lightweight and easily disposable paper cup container.

Japanese Examined Patent Publication No. 63-24464 JP-A-8-58764 JP 2002-264918 A Japanese Patent No. 2895556

  When a cup container is used as a refill package, refilling of the contents into the storage container is performed by, for example, opening the opened cup container to the opening of the storage container and gradually moving the contents into the storage container. And do by pouring. However, at the time of this refilling work, the contents may spill out and stain the hands and surroundings, so it cannot be said that it is convenient.

  Therefore, it is conceivable to provide some parts for facilitating the refilling of the contents in the cup container constituting the refill package. In this case, the most suitable attachment method according to the shape and size of the cup container and the parts attached to the cup container is required.

  Therefore, an object of the present invention is to provide a production method capable of efficiently producing a packaging container that can be easily refilled with contents in another container and can be easily discarded.

  The present invention is used for transferring contents to another container, and has a cylindrical container body having an open end, a bottom portion, and a side wall, a funnel whose diameter is narrowed toward the open end, and a tube surrounding the outer surface of the funnel. The present invention relates to a method of manufacturing a packaging container including a funnel part including a side wall having a shape.

  In the manufacturing method according to the present invention, a funnel part is inserted into a container body having a thermoplastic resin layer provided on the innermost surface and a metal layer provided on the outer side of the thermoplastic resin layer, and the side wall of the funnel part The coil is arranged with a predetermined gap between the side wall and the side wall of the packaging container, and a high frequency current is supplied to the coil while pressing the side wall of the funnel part against the side wall of the packaging container. The part is dielectrically heated to weld the thermoplastic resin layer and the side wall of the funnel part.

  Alternatively, the funnel part is inserted into the container body having the thermoplastic resin layer on the innermost surface, the end face of the ultrasonic horn is brought into contact with the overlapping part of the side wall of the funnel part and the side wall of the packaging container, and the side wall of the funnel part While pressing on the side wall of the packaging container, the ultrasonic horn is oscillated to weld the thermoplastic resin layer and the side wall of the funnel part.

  According to the present invention, since the high frequency welding or the ultrasonic welding is used, the container main body and the funnel part can be joined at high speed and easily via the thermoplastic resin layer on the inner surface of the container main body.

The perspective view which shows schematic structure of the package which concerns on this invention 1 is an exploded perspective view of the package shown in FIG. Sectional view of the III-III line shown in FIG. Plan view of the membrane shown in FIG. Sectional drawing of the VV line shown by FIG. The perspective view which shows the use condition of the package which concerns on this invention Sectional drawing of the VII-VII line shown by FIG. The figure which shows schematic structure of the high frequency welding apparatus used with the manufacturing method which concerns on the 1st Embodiment of this invention. View from A ₅ -A ₅ 'line shown in FIG. 8 Sectional view of B ₅ -B ₅ 'line shown in FIG. Sectional drawing for demonstrating 1 process of the manufacturing method which concerns on the 1st Embodiment of this invention Enlarged view of a C ₅ portion shown in FIG. 11 Sectional drawing for demonstrating the process following FIG. Sectional drawing for demonstrating the process following FIG. Sectional drawing for demonstrating the process following FIG. Sectional view showing the welding location of the funnel parts and the container body The schematic diagram for demonstrating the manufacturing method which concerns on the 2nd Embodiment of this invention. Sectional view of D ₅ -D ₅ 'line shown in FIG. 17 The figure for demonstrating the manufacturing method which concerns on the 3rd Embodiment of this invention. FIG. 19 is a sectional view taken along the line E ₅ -E ₅ ′ shown in FIG. The schematic diagram for demonstrating the manufacturing method which concerns on the 4th Embodiment of this invention.

(Basic configuration)
First, a basic configuration of a package according to the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a schematic configuration of a package according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the package shown in FIG. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG.

  The package 1 is used as a refill package for packaging powdery or liquid materials and refilling the contents into other storage containers. The packaging container 2 and the inside of the packaging container 2 are filled. And a membrane 3 for sealing the open end 11 of the packaging container 2. Furthermore, an overcap 4 formed of high density polyethylene (HDPE), polypropylene (PP) or the like is attached to the packaging container 2 in order to protect the membrane 3. The content 5 is not particularly limited as long as it has fluidity, and the packaging container 2 according to the present invention can be applied to various materials such as powder, granule, and liquid.

  The packaging container 2 includes a cylindrical container body 10 with one end opened, and a funnel part 8 including a funnel 20 housed inside the container body 10.

  The container body 10 has a side wall 17, a bottom portion 16, and an open end 11. In this embodiment, the container main body 10 is formed in a cylindrical shape by rounding rectangular sheet materials, partially overlapping them, and bonding the overlapping portions. The bottom portion 18 of the container body 10 includes a circular bottom plate 19 and a folded portion 18 that sandwiches and holds the outer peripheral portion of the bottom plate 19. On the other hand, a curling 12 is formed at the open end 11 of the container body 10 by bending a part of the side wall 17 outward and winding it in an annular shape.

  The material for forming the container body 10 is not particularly limited, but it is preferable to use a material mainly made of paper in consideration of weight reduction of the container, ease of disposal, and resource saving. As an example, in food packaging applications, low-density polyethylene (LDPE), polyethylene terephthalate (PET), aluminum foil, and paper are laminated in order from the side that is the inner surface of the container body 10, and high gas barrier properties (particularly Sheet material having a property of blocking volatile components derived from contents such as oxygen, water vapor and aromatic components).

  The funnel part 8 refers to a part composed of a funnel having a portion whose diameter decreases toward one end and a member integrated with the funnel. The funnel part 8 illustrated in FIGS. 1 to 3 includes a funnel 20 and a cylindrical side wall 22 connected to the wide mouth portion of the funnel part 8, and is inserted into the container body 10 from the open end 11 and accommodated therein. The container 10 is fitted. As will be described later, the funnel 20 is provided for facilitating refilling of the contents 5 into another container, and is arranged so that the diameter decreases toward the open end 11. The taper angle α of the funnel 20 is appropriately set according to the fluidity of the contents, but when the contents are powder, it is set to at least 20 ° to 45 °, more preferably 20 °.

  The funnel part 8 may be integrally formed of a resin material such as HDPE or PP, for example, or may be configured by connecting a funnel 20 and a side wall 22 separately formed using paper, resin, paper mixed resin, or the like. May be. When resin or paper mixed resin is used, the funnel part 8 may be formed by, for example, injection molding. The shape and attachment method of the funnel 20 and the funnel part 8 are not limited to the examples of FIGS.

  4 is a plan view of the membrane shown in FIG. 2, and FIG. 5 is a cross-sectional view taken along line VV shown in FIG.

  The membrane 3 is used to seal the open end 11 of the packaging container 2 after the packaging container 2 is filled with the material. Depending on the use of the packaging container 2, the sheet material is formed of a single layer. Or the sheet material which laminated | stacked several layers can be utilized. When the content of the packaging container 2 is food or the like, it is preferable to form the membrane 3 with a material having gas barrier properties.

  Specifically, as shown in FIG. 5, the membrane 3 is made of resin through a sealant layer 31 sealed in the packaging container 2, a resin layer 32 laminated on the sealant layer 31, and an adhesive layer 33. And a metal foil layer 34 laminated on the layer 32. As an example, the sealant layer 31 may be formed of polyethylene, the resin layer 32 may be formed of polyethylene terephthalate (PET), and the metal foil layer 34 may be formed of aluminum. The number of layers and the stacking method of the layers constituting the membrane 3 are not particularly limited and may be arbitrary.

  The membrane 3 is formed with six cutting lines 30 extending radially from the center so as to be broken when the tension exceeds a predetermined magnitude due to external pressure. 4 and 5, the cutting line 30 cuts only the sealant layer 31 and the resin layer 32 in the thickness direction of the membrane 3, and draws a broken line in the extending direction of the membrane 3. Is formed.

  The cutting line 30 is for adjusting the breaking strength of the membrane 3, and according to the pressing force applied to the membrane 3, the number, the line shape, the length and depth of the cutting part can be arbitrarily set. it can. As an ideal number of the cutting lines 30, it is desirable to provide 3 to 10 radial lines from the center. The cutting line 30 may be linear or curved. Moreover, in the extending | stretching direction of the membrane 3, the cutting line 30 does not necessarily need to be a broken line perforation, and you may form it so that a continuous line may be drawn.

  6 is a perspective view showing a usage state of the package according to the present invention, and FIG. 7 is a cross-sectional view taken along the line VII-VII shown in FIG. More specifically, in FIGS. 6 and 7, (a) shows a state before the membrane is ruptured, and (b) shows a state after the membrane is ruptured.

  When refilling the contents 5 in the package 1 into another container 7, first, as shown in FIGS. 6 (a) and 7 (a), the packaging container 2 with the overcap removed is inverted, and the membrane 3 is brought into contact with the opening of the storage container 7. At this time, since the opening on the narrow mouth side of the funnel 20 is disposed within the range of the opening of the storage container 7, the center of the packaging container 2 is aligned with the center of the storage container 7.

  Next, the bottom of the package 1 is pushed in the direction of the arrow in the figure. At this time, the membrane 3 receives a pressing force from the opening of the funnel 20 and the container 7 as the packaging container 2 is pressed. When the tension of the membrane 3 exceeds a predetermined breaking strength, FIG. As shown in FIG. 7 (b), the membrane 3 is broken. When the membrane 3 is broken, the funnel 20 is inserted into the container 7 according to the pressing force applied to the packaging container 2, and the broken membrane 3 is folded into a space sandwiched between the funnel 20 and the side wall 22. . As a result, the opening on the outer side of the funnel 20 is greatly opened, so that the content 5 flows into the container 7 along the taper of the funnel 20 according to gravity.

  As described above, according to the packaging container 2 and the package 1 using the same according to the present invention, the membrane 3 and the opening of the container 7 are brought into contact with each other, and the packaging container 2 is pressed toward the storage container 7. Accordingly, the opening of the funnel 20 is inserted into the storage container 7 almost simultaneously with the breakage of the membrane 3. Since the contents 5 in the packaging container 2 are guided into the storage container 7 by the funnel 20, it is possible to prevent the contents 5 from being scattered or spilled during the refilling operation. Therefore, according to the packaging container 2 and the package 1 which concern on this embodiment, it becomes possible to refill the contents easily.

  Hereinafter, the manufacturing method of the packaging container which concerns on the 1st-4th embodiment of this invention is demonstrated. In the following description, the method of joining the funnel part and the container body, which is a feature of the present invention, will be mainly described.

(First embodiment)
FIG. 8 is a diagram showing a schematic configuration of the high-frequency welding apparatus used in the manufacturing method according to the first embodiment of the present invention. More specifically, FIG. 8A is a front view, and FIG. ) Is a rear view. 9 is a view as seen from the line A ₅ -A ₅ ′ shown in FIG. 8, and FIG. 10 is a cross-sectional view taken along the line B ₅ -B ₅ ′ shown in FIG. 9.

  The high-frequency welding device 551 includes a pair of arc-shaped frame members 552a and 552b formed of fiber reinforced plastic (FRP), coils 554a and 554b, and a pair of attachments 555a and 555b attached to the coils 554a and 554b. Prepare.

  The coils 554a and 554b are formed by bending a copper tube and are accommodated in grooves 552a and 553b formed in the bottoms of the frame members 552a and 552b. As shown in FIG. 8B, one ends of the coils 554a and 554b are connected by a flexible conductor 557 and a conduit 557. The coils 554a and 554b are supplied with high frequency power from a power supply device (not shown). Further, the coils 554a and 554b are cooled by cooling water circulating in the hollow interior.

  The high-frequency welding device 551 is attached to a moving mechanism (not shown) via attachments 555a and 555b, and can move up and down in the vertical direction (the vertical direction in FIGS. 8 and 10) according to the operation of the moving mechanism. Further, the frame members 552a and 552b (and the coils 554a and 554b accommodated therein) open and close in a direction toward and away from each other according to the operation of the moving mechanism, as indicated by solid lines and two-dot chain lines in FIGS. It is free.

FIG. 11 is a cross-sectional view for explaining one process of the manufacturing method according to the first embodiment of the present invention, and FIG. 12 is an enlarged view of a portion C ₅ shown in FIG. 13 is a cross-sectional view for explaining the process following FIG. 11, FIG. 14 is a cross-sectional view for explaining the process following FIG. 13, and FIG. 15 explains the process following FIG. FIG.

  First, as shown in FIG. 11, the funnel part 508 molded by injection molding or the like is inserted into the open end 511 of the container body 510 molded by a cup molding machine or the like.

  The container main body 510 is formed of a sheet material mainly made of paper, and has a cylindrical shape having an open end 511, a side wall 517, and a bottom. A thermoplastic resin layer such as polyethylene is provided on the innermost surface of the side wall 517, and a metal layer such as an aluminum foil is provided on the outer side of the thermoplastic resin layer.

  On the other hand, the funnel part 508 has a funnel 520 whose diameter is narrowed toward one end, and a cylindrical side wall 523 that is connected to the wide-mouth side opening of the funnel 520 and surrounds the outer surface of the funnel 520. Further, as shown in FIG. 12, the ridges 524 a to 524 c are provided on the narrow mouth side portion of the funnel 520, and the ridges 525 a and 525 b are provided on the wide mouth side portion of the funnel 520. Yes. Each of the ridges 524a to 524c, 525a and 525b is integrally formed with the side wall 523 so as to protrude from the outer surface of the side wall 523 and extend in the circumferential direction over the entire circumference of the side wall 523. Further, the outermost diameters of the ridges 524 a to 524 c, 525 a and 525 b are set larger than the inner diameter of the container main body 510. Therefore, in the step shown in FIG. 11, the funnel part 508 is fitted into the container body 510 while the side walls 517 of the container body 510 are pushed outward by the ridges 524a to 524c, 525a and 525b.

  Next, as shown in FIG. 13, after inserting the work fitting the funnel part 508 into the container body 510 into the cylindrical anvil 556, the high-frequency welding device 551 is lowered toward the open end of the container body 510, As shown in FIG. 14, the coils 554 a and 554 b are inserted into a space sandwiched between the outer surface of the funnel 520 and the inner surface of the side wall 523. The high frequency welding apparatus 551 is lowered until the vertical positions of the coils 554a and 554b are substantially the same as the vertical positions of the ridges 524a to 524c formed on the side wall 523 of the funnel part 508.

  Next, the frame members 552a and 552b are horizontally moved away from each other (the direction of the arrow shown in FIG. 14), and the side wall of the funnel part 508 is interposed between the frame members 552a and 552b and the anvil 556 as shown in FIG. An overlapping portion between 523 and the side wall 517 of the container body 510 is sandwiched. At this time, the coils 554a and 554b are disposed at a position away from the overlapping portion of the side walls 517 and 523 by a predetermined distance via the frame members 552a and 552b.

  Next, a high-frequency current is supplied from a power supply device (not shown) to the coils 554a and 554b for a predetermined time, and the metal layer constituting the side wall 517 of the container body 510 is dielectrically heated.

  FIG. 16 is a cross-sectional view showing a welding location between the funnel part and the container body.

  By the internal heating of the metal layer, the thermoplastic resin layer provided on the inner surface side (the innermost surface of the side wall 517) is melted. As described above, since the ridges 524a to 524c are pressed so as to push and spread the side wall 517 of the container body 510, the molten resin is solidified in a state of spreading to the outer surfaces of the ridges 524a to 524c. As a result, as shown in FIG. 16, the side wall 523 of the funnel part 508 is joined to the side wall 517 of the container body 510 with the ridges 524 a to 524 c biting into the thermoplastic resin layer.

  In FIG. 16, the ridges 525 a and 525 b are not welded to the side wall 517, but the state in which the inner surface of the side wall 517 is expanded by the difference between the outermost diameter and the inner diameter of the side wall 517 is maintained. Yes. Thus, by maintaining the close contact state between the ridges 525 a and 525 b and the inner surface of the side wall 517, it is possible to prevent the contents from entering between the side wall 523 of the funnel part 508 and the container body 510.

  As described above, in the manufacturing method according to the present embodiment, the funnel part 508 and the container body 510 can be bonded at high speed and reliably by high-frequency welding, so that the packaging container can be efficiently manufactured. It becomes.

(Second Embodiment)
FIG. 17 is a schematic view for explaining the manufacturing method according to the second embodiment of the present invention, and FIG. 18 is a cross-sectional view taken along line D ₅ -D ₅ ′ shown in FIG.

  In this embodiment, the container main body 510 and the funnel part 508 having the same configuration as that described in the first embodiment are joined by high-frequency welding using a ring-shaped coil 559 disposed on the outer surface of the container main body 510. More specifically, after the funnel part 508 is fitted to the container body 510, the container body 510 is inserted into the coil 559 and the position of the coil 559 is adjusted so as to surround the overlapping portion of the side walls 517 and 523. To do. After that, as in the first embodiment, a high-frequency current is supplied from a power supply device (not shown) to the coil 559 for a predetermined time to weld the side wall 523 of the funnel part 508 and the side wall 517 of the container body 510.

  In this embodiment, the coil 559 for the container body 510 can be obtained simply by performing an operation for moving the coil 559 up and down with respect to the standing container body 510 or an operation for moving the container body up and down with respect to the coil 559 held at a predetermined position. Therefore, the mechanism of the high-frequency welding apparatus can be simply configured. Moreover, in this embodiment, since the substantially whole periphery of the container main body 510 can be welded simultaneously, joining with sufficient intensity | strength can be performed efficiently. Furthermore, since the high-frequency welding device and the anvil do not contact the container main body 510 and the funnel part 508, there is no possibility of damaging the packaging container.

  In the present embodiment, only the coil 559 is illustrated for the sake of simplification, but a frame member incorporating the coil 559 and an anvil inserted into the funnel part 508 are the same as in the first embodiment. And may be used. That is, welding may be performed by supplying a high-frequency current to the coil 559 in a state where the overlapping portion between the side wall 523 of the funnel part 508 and the side wall 517 of the container body 510 is sandwiched between the frame member and the anvil.

(Third embodiment)
FIG. 19 is a view for explaining the manufacturing method according to the third embodiment of the present invention, and FIG. 20 is a cross-sectional view taken along line E ₅ -E ₅ ′ shown in FIG.

  In this embodiment, the container main body 510 and the funnel part 508 having the same configuration as in the first embodiment are joined by ultrasonic welding using an ultrasonic horn 560.

The ultrasonic horn 560 has an end surface 563 made of a curved surface having the same curvature as the outer surface of the container main body 510, and can abut a part of the outer surface along the circumferential direction of the container main body 510. The distance d from the position T ₁ closest to the transducer on the end surface 563 to the position T ₀ of the tip of the end surface 563 is determined so that an ultrasonic amplitude effective for welding is obtained within the range of the positions T _{0 to} T _1. Is done. For example, the value of the distance d can be set so that the minimum amplitude required for welding is obtained on the end surface 563 at the position T ₀ under the condition that the maximum amplitude is obtained on the end surface 563 at the position T ₁ . Therefore, the contact range between the end surface 563 of the ultrasonic horn 560 and the outer surface of the container body 510 (represented by an angle θ about the central axis Z of the container body 510) is determined using the distance d and the radius r of the container body 510. Can be sought.

  When joining the container main body 510 and the funnel part 508, first, a work in which the funnel part 508 is fitted to the open end 516 of the container main body 510 is attached to the anvil 562. Next, as shown in FIGS. 19 and 20, the end face 563 of the ultrasonic horn 560 is brought into contact with the overlapping portion of the side wall 523 of the funnel part 508 and the side wall 517 of the container body 510. Then, the ultrasonic horn 560 is oscillated for a predetermined time while pressing the side wall 523 of the funnel part 508 against the side wall 517 of the container body 510 between the ultrasonic horn 560 and the anvil 562. By the ultrasonic vibration, the thermoplastic resin layer (the innermost surface of the side wall 517) at the interface between the side walls 517 and 523 is melted, and a part of the funnel part 508 and a part of the container body 510 are joined. Thereafter, the ultrasonic horn 560 is moved to a position indicated by, for example, a two-dot chain line, and the ultrasonic horn 560 is oscillated again to join a part of the funnel part 508 and a part of the container body 510. it can. As described above, the funnel part 508 and the container main body 510 are necessary by causing the ultrasonic horn 560 to oscillate a plurality of times intermittently while changing the contact position between the end surface 563 of the ultrasonic horn 560 and the outer surface of the container main body 510. Bonding can be performed with high strength.

  In addition, when ultrasonically welding the funnel part 508 and the container body 510 a plurality of times, instead of moving the ultrasonic horn 560, the workpiece is rotated around the central axis Z-axis of the container body 510, The contact location between the sonic horn 560 and the container body 510 may be changed.

  Further, a plurality of ultrasonic horns may be arranged side by side in the circumferential direction of the container main body 510 and these ultrasonic horns may be oscillated in a predetermined order to continuously ultrasonically weld a plurality of locations. For example, in addition to the ultrasonic horn 560 (solid line) in FIGS. 19 and 20, a second ultrasonic horn is disposed at the position indicated by a two-dot chain line, and successive oscillation is performed so that no vibration interference occurs between them. , The funnel part 508 can be efficiently joined to the container body 510.

  In the case of internal heating by ultrasonic vibration as in this embodiment, a metal layer serving as a heating element is not required for the container body or the funnel, so that a packaging container that can be easily saved and discarded can be efficiently manufactured. .

(Fourth embodiment)
FIG. 21 is a schematic diagram for explaining the manufacturing method according to the fourth embodiment of the present invention.

  In this embodiment, ultrasonic welding is performed over the entire circumference of the container main body 510 using two ultrasonic horns 564 and 565 arranged in series.

  More specifically, the work in which the funnel part 508 is fitted to the open end 516 of the container body 510 is attached to an anvil (not shown). Next, the ultrasonic horn 564 is rotated while the workpiece is rotated around the central axis Z of the container main body 510 while the overlapping portion of the funnel part 508 and the side wall of the container main body 510 is in contact with the end face of the ultrasonic horn 564. And 565 in the alignment direction (the direction indicated by the block arrow in the figure). The ultrasonic horns 564 and 565 continuously oscillate while the workpiece is in contact, and ultrasonically weld the contact portion with the container main body 510.

  According to this embodiment, since the funnel part 508 can be welded continuously over the entire circumference of the container body 510, a packaging container having a high speed and sufficient bonding strength can be manufactured.

(Other variations)
In each of the first to fourth embodiments, the example in which the funnel part presses the container body so as to expand the container body due to the dimensional difference between the outer diameter of the funnel part (projection) and the inner diameter of the container body is shown. When the funnel parts and the side walls of the container body can be crimped using an anvil or the like, the ridges and the dimensional difference between the two may be eliminated.

  Moreover, although said 1st-4th embodiment demonstrated the example in which the protruding item | line provided in the side wall of the funnel part was formed over the perimeter of a side wall, a some protruding item | line is intermittent. It may be formed.

  Furthermore, in each of the first to fourth embodiments described above, an example in which a resin funnel part is welded to a paper container body has been described, but even when the funnel part is also made of a paper-based material, The joining method according to the present invention can be similarly applied.

  Furthermore, in each of the first to fourth embodiments, the container body and the funnel part may be welded without using the anvil. Moreover, the shape of an anvil is not specifically limited, You may use the anvil comprised from several parts.

  Further, in each of the first to fourth embodiments, a flange may be further provided on the side wall of the funnel part, and both may be welded in a state where the flange of the funnel part is superimposed on the flange of the container body. In this case, it is preferable to provide a ridge on the lower surface of the flange portion of the funnel part because it facilitates welding.

  Furthermore, in the third and fourth embodiments described above, the joining method in which the ultrasonic horn is brought into contact with the outside of the container main body has been described. However, even if the ultrasonic horn is brought into contact with the inner surface side of the side wall of the funnel part. good.

  INDUSTRIAL APPLICABILITY The present invention can be used as a packaging container for transferring powdery, granular, and liquid fluid materials such as instant coffee and powdered milk, toners for copying machines and laser printers to other containers. .

DESCRIPTION OF SYMBOLS 1 Package 2 Packaging container 3 Membrane 5 Powder 7 Container 8 Funnel part 10 Container body 11 Open end 17 Side wall 20 Funnel 508 Funnel part 510 Container body 511 Open end 517 Side wall 520 Funnel 523 Side wall 524 Convex 554, 559 Coils 560, 564 565 Ultrasonic horn 563 End face

Claims (7)

A cylindrical container body having an open end, a bottom, and a side wall, a funnel having a diameter narrowing toward the open end, and a cylindrical shape surrounding the outer surface of the funnel. A funnel part including a side wall, and a first protrusion that protrudes from an outer surface of the side wall and extends in a circumferential direction is provided on a narrow side portion of the funnel on a side wall of the funnel part, and the funnel part includes A second ridge that protrudes from the outer surface of the side wall and extends in the circumferential direction is provided on the wide-mouth side portion of the funnel in the side wall of the part, and the outer diameters of the first and second ridges are as follows: A method for manufacturing a packaging container, which is set to be larger than the inner diameter of the container body,
The container body having a thermoplastic resin layer provided on the innermost surface and a metal layer provided on the outer side from the thermoplastic resin layer is provided with a side wall of the container body by the first and second ridges. Insert the funnel part in a state where it is spread outward,
A coil is arranged with a predetermined gap between the first protruding strip of the funnel part and the overlapping portion of the side wall of the container body,
While pressing the side wall of the funnel part against the side wall of the container body, a high frequency current is supplied to the coil to inductively heat a part of the metal layer, and the thermoplastic resin layer and the side wall of the funnel part are welded. A method for manufacturing a packaging container.   The manufacturing method of the packaging container of Claim 1 which inserts the said coil in the space pinched | interposed by the outer surface of the said funnel, and the inner surface of the said side wall. A cylindrical container body having an open end, a bottom, and a side wall, a funnel having a diameter narrowing toward the open end, and a cylindrical shape surrounding the outer surface of the funnel. A funnel part including a side wall, and a first protrusion that protrudes from an outer surface of the side wall and extends in a circumferential direction is provided on a narrow side portion of the funnel on a side wall of the funnel part , and the funnel part includes A second ridge that protrudes from the outer surface of the side wall and extends in the circumferential direction is provided on the wide-mouth side portion of the funnel in the side wall of the part, and the outer diameters of the first and second ridges are as follows: A method for manufacturing a packaging container, which is set to be larger than the inner diameter of the container body ,
The container body having a thermoplastic resin layer provided on the innermost surface and a metal layer provided on the outer side from the thermoplastic resin layer is provided with a side wall of the container body by the first and second ridges. Insert the funnel part in a state where it is spread outward ,
The outer surface of the side wall of the container body is set to substantially the entire circumference in the circumferential direction so that a predetermined gap is formed between the side wall of the funnel part and the outer surface of the container body at the overlapping portion of the side wall of the container body. Place the coil so that it surrounds,
While pressing the side wall of the funnel part against the side wall of the container body, a high frequency current is supplied to the coil to inductively heat a part of the metal layer, and the thermoplastic resin layer and the side wall of the funnel part are welded. A method for manufacturing a packaging container. A cylindrical container body having an open end, a bottom, and a side wall, a funnel having a diameter narrowing toward the open end, and a cylindrical shape surrounding the outer surface of the funnel. A funnel part including a side wall, and a first protrusion that protrudes from an outer surface of the side wall and extends in a circumferential direction is provided on a narrow side portion of the funnel on a side wall of the funnel part, and the funnel part includes A second ridge that protrudes from the outer surface of the side wall and extends in the circumferential direction is provided on the wide-mouth side portion of the funnel in the side wall of the part, and the outer diameters of the first and second ridges are as follows: A method for manufacturing a packaging container, which is set to be larger than the inner diameter of the container body,
In the container body having the thermoplastic resin layer on the innermost surface, the funnel part is inserted in a state where the side wall of the container body is pushed outward with the first and second ridges,
Abutting the end face of the ultrasonic horn along the overlapping portion of the first ridge of the funnel part and the side wall of the container body,
A method of manufacturing a packaging container, wherein the ultrasonic horn is oscillated while pressing the side wall of the funnel part against the side wall of the container body, thereby welding the thermoplastic resin layer and the side wall of the funnel part. The ultrasonic horn has an end surface in contact with only a part of the outer surface of the container body in the circumferential direction of the container body,
While changing the contact position between the end surface of the ultrasonic horn and the outer surface of the container body, the ultrasonic horn is intermittently oscillated a plurality of times to weld the thermoplastic resin layer and the side wall of the funnel part. The manufacturing method of the packaging container of Claim 4. A cylindrical container body having an open end, a bottom, and a side wall, a funnel having a diameter narrowing toward the open end, and a cylindrical shape surrounding the outer surface of the funnel. A method of manufacturing a packaging container comprising a funnel part including a side wall,
Insert the funnel part into a container body having a thermoplastic resin layer on the innermost surface,
In the circumferential direction of the container body, a plurality of the ultrasonic horns having end faces along only a part of the outer surface of the container body are arranged side by side in the circumferential direction of the container body, and the side wall of the funnel part and the container body Abutting the end faces of the plurality of ultrasonic horns along the overlapping portion with the side wall,
While urging the side wall of the funnel part against the side wall of the container body, the plurality of ultrasonic horns are oscillated in a predetermined order to weld the thermoplastic resin layer and the side wall of the funnel part. Production method. A cylindrical container body having an open end, a bottom, and a side wall, a funnel having a diameter narrowing toward the open end, and a cylindrical shape surrounding the outer surface of the funnel. A method of manufacturing a packaging container comprising a funnel part including a side wall,
Insert the funnel part into a container body having a thermoplastic resin layer on the innermost surface,
A plurality of the ultrasonic horns are arranged side by side in a predetermined direction, and an end face of the ultrasonic horn is brought into contact along an overlapping portion between a side wall of the funnel part and a side wall of the container body,
While pressing the side wall of the funnel part against the side wall of the container main body, the ultrasonic horn is oscillated, and the container main body is rotated around the central axis while being in contact with the end face of the ultrasonic horn. The manufacturing method of a packaging container which welds the said thermoplastic resin layer and the side wall of the said funnel part by moving to a direction.

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