JP2008162611A - Composite container and manufacturing method thereof - Google Patents

Abstract

A lid (lid) body and a carton portion can be easily separated.
A carton portion 21 formed of a packaging material and constituting a box-like body, and a lid body 22 made of a resin and integrally formed at an upper edge of the carton portion 21 are provided. In the vicinity of the upper edge of the carton portion 21, a fracture portion p1 is formed in the circumferential direction. Since the broken portion p1 is formed in the circumferential direction in the vicinity of the upper edge of the carton portion 21, the lid 22 and the carton portion 21 can be easily separated.
[Selection] Figure 1

Description

  The present invention relates to a composite container and a method for manufacturing the same.

  Conventionally, in packaging containers that contain liquid foods such as milk and soft drinks as contents, the top of the packaging container body is formed by injection molding, and has a lid (lid) that forms the top wall, that is, A composite container is provided.

  In manufacturing this type of composite container, it has a laminated structure such as a paper base material, a resin film, etc., and is made of a plate-like material composed of a packaging material for one composite container formed by cutting into a predetermined shape in advance. Blanks are sealed in a vertical direction to form a cylindrical carton, and the cylindrical carton is set in a filling machine. At one end of the cylindrical carton, a cover body is integrally and liquid-tightly formed by injection molding, and a carton having an opening at the bottom, that is, a carton with a cover body is formed. Therefore, one end of the cylindrical carton is set so as to face the cavity space of the mold apparatus, and the melted resin is filled into the cavity space.

Subsequently, the carton with a lid is inserted into a bucket of an endless conveyor, is intermittently conveyed in an inverted state, filled with liquid food through the opening in the bottom, and then the bottom is a crease. The inside of the composite container is hermetically sealed by heat (see, for example, Patent Document 1).
JP 10-278903 A

  However, in the conventional composite container, the lid is formed by molding a resin, whereas the portion other than the lid, that is, the carton portion is formed by the packaging material. If the composite container is discarded as it is after drinking, it becomes difficult to recycle the material.

  Therefore, it is conceivable to separate the lid body and the carton portion and discard them. However, the lid body is formed integrally with the upper edge of the carton portion by injection molding, so it is relatively soft. The lid part is cut with scissors or the like to separate the lid and the carton part and discard them.

  An object of the present invention is to solve the problems of the conventional composite container and to provide a composite container capable of easily separating the lid and the carton portion and a method for manufacturing the same.

  For this purpose, the composite container of the present invention has a carton portion formed of a packaging material and constituting a box-like body, and a lid made of resin and integrally formed at the upper edge of the carton portion.

  And a fracture | rupture part is formed over the circumferential direction in the vicinity of the upper edge of the said carton part.

  According to the present invention, the composite container includes a carton portion formed of a packaging material and constituting a box-like body, and a lid made of resin and integrally formed at the upper edge of the carton portion.

  And a fracture | rupture part is formed over the circumferential direction in the vicinity of the upper edge of the said carton part.

  In this case, since the broken portion is formed in the circumferential direction in the vicinity of the upper edge of the carton portion, the lid body and the carton portion can be easily separated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a composite container according to an embodiment of the present invention.

  In the figure, 15 is a composite container, 21 is a carton part formed of a packaging material, 22 is a lid attached to the upper edge of the carton part 21 and made of resin and integrally formed with the carton part 21 by injection molding. The lid 22 covers and closes the carton portion 21 and seals the composite container 15. The carton portion 21 is composed of four side walls m1 to m4 and a bottom wall b1, and constitutes a box-like body whose upper end is opened. The lid 22 includes a collar 27 extending upward from the upper edge of each of the side walls m1 to m4, and a cap 28 that covers and closes the upper end of the collar 27. The collar 27 includes a pyramid portion 45 extending obliquely from the upper edge of each of the side walls m1 to m4, and a cylindrical portion 46 extending upward from the pyramid portion 45. The cap 28 is connected to the cylindrical portion 46 via a thin portion (not shown), and when a user pulls up a handle portion (not shown) formed on the cap 28, the thin portion is broken and a spout (not shown) is formed. It is formed. In this way, the composite container 15 can be opened.

  The packaging material is a paper base material, a first resin film made of a resin such as a polyethylene resin that is coated on the paper base material to form an outermost layer, and a polyethylene that is coated on the paper base material to form an innermost layer. It has a laminate structure including a second resin film made of a resin such as a resin, and, if necessary, is made of an aluminum foil (fog), a gas barrier resin, and the like. It is formed adjacent to the material.

  In the present embodiment, the carton portion 21 is formed of a rectangular tube having a quadrangular cross section, but the cross section can be formed in an arbitrary shape such as a cylinder or a polygon. Further, in the present embodiment, the lid body 22 is molded in a completely integrated manner in advance, but the collar and the cap can be molded separately. In that case, a male screw is formed on the outer peripheral surface of the cylindrical portion of the collar, and a female screw is formed on the inner peripheral surface of the cap, and the collar and the cap can be attached and detached by screwing the male screw and the female screw together.

  By the way, in the composite container 15 having the above-described configuration, in particular, the resin constituting the lid 22 is coated in the vicinity of the upper edge of the carton portion 21 so that the lid 22 and the carton portion 21 can be easily separated. A broken portion p <b> 1 is formed along the circumferential direction of the carton portion 21 at the upper edge of the portion that is not formed. The broken portion p1 is formed by making a cut such as a perforation line, a half cut line, or a weak line in the paper base at the stage of manufacturing the packaging material. In this case, the rupture portion p1 can be formed by penetrating the paper base material such as perforations, but also in the thickness direction of the paper base material such as a half-cut line or a weak line. It can be formed by making a cut in a part.

  Next, the manufacturing apparatus and manufacturing method of the composite container 15 will be described.

  FIG. 2 is a perspective view showing a composite container manufacturing apparatus in the embodiment of the present invention, and FIG. 3 is a conceptual diagram showing a composite container manufacturing method in the embodiment of the present invention.

  In the drawing, 11 is a manufacturing apparatus, and the manufacturing apparatus 11 includes two independent first and second filling lines 12 and 13, and in each of the first and second filling lines 12 and 13, For example, two types of composite containers 15 and 16 are produced based on the set reels R1 and R2. In this case, each of the composite containers 15 and 16 has a different size in the vertical direction, and only the amount of liquid food such as milk and soft drinks stored as the contents is different. Therefore, the composite containers 15 and 16 are mainly combined in the first filling line 12. The case where the container 15 is manufactured will be described, and the case where the packaging container 16 is manufactured in the second filling line 13 will be supplementarily described as necessary.

  By the way, in each of the first and second filling lines 12 and 13, the two reels R1 and R2 can be set in a feeder (not shown), and the packaging material 18 fed out from one of the reels. When there is no more, the packaging material 18 is fed out from the other reel. For this purpose, the last end of the packaging material 18 fed out from one reel and the foremost end of the packaging material 18 fed out from the other reel are connected by a splicer 19. In this way, by replacing the reels R1 and R2, the empty reel is replaced with a new reel, and the packaging material 18 is continuously fed out.

  The packaging material 18 is formed with breaking portions p1 extending in the lateral direction at predetermined intervals.

  First, in order to prevent the packaging material 18 from absorbing moisture when performing vertical sealing downstream of the splicer 19 in the conveying direction of the packaging material 18, a strip tape (not shown) is attached to the edge of the packaging material 18. 2, the end face of the packaging material 18 is fused so as to be wrapped.

  Subsequently, the packaging material 18 is sent to the container molding area AR1 and cut into lengths corresponding to the dimensions of the composite container 15 to form blanks 23. In the blanks 23, a fracture portion p1 is formed in the vicinity of one of the cut portions q1 in parallel with the cut portion q1. Further, a crease is formed in advance in a predetermined portion of the blanks 23, and a molding apparatus (not shown) folds the blanks 23 along the crease to form a cylindrical carton having a quadrangular cross section, that is, a cylindrical carton 24. To do. At this time, the cylindrical carton 24 is formed so that the fracture portion p1 is on one end side. The cylindrical cartons 24 are formed one by one in order to process one pair at a time in the subsequent process.

  Next, each cylindrical carton 24 is sent to the injection molding area AR2, and in the injection molding area AR2, a lid 22 is integrally and liquid-tight at one end of the cylindrical carton 24 by injection molding. And a carton 25 with a lid having a cylindrical carton 24 and a lid 22 integrated with each other. At this time, the carton 25 with a lid is formed so that the fracture portion p1 is positioned on the carton portion 21 side.

  In the injection molding area AR2, a carton forming apparatus with a lid including a mandrel unit 31, an injection molding unit 32, a molding material supply unit 33 and the like is disposed. The mandrel unit 31 includes a plurality of mandrels 35 arranged in a radial pattern at an equal pitch angle (90 [°] in the present embodiment), and in this embodiment, intermittently. Each mandrel 35 is rotated and placed in a loading station for loading the cylindrical carton 24, a forming station for forming the lid, a discharge station for discharging the carton 25 with lid, and an empty station.

  The injection molding unit 32 includes an injection device 37 and a mold device 38 disposed in the molding station. The injection device 37 includes a resin supplied from a hopper 39 of the molding material supply unit 33, for example, The polyethylene resin pellets are received, melted, and filled into the cavity space of the mold apparatus 38.

  Therefore, by cooling the resin in the cavity space, the lid body 22 is integrally formed at one end of the cylindrical carton 24, and the carton 25 with a lid body is formed.

  When the carton 25 with the lid is formed in this way, the carton 25 with the lid is taken out from the mandrel 35 by a pickup device (not shown) at the discharge station and sent to the filling area AR3 for filling with liquid food. .

  The filling area AR3 is formed in an aseptic filling chamber (not shown), and an endless conveyor 41 as a conveying device is movably disposed in the aseptic filling chamber, and the carton 25 with a lid is in an inverted state. It is mounted on the endless conveyor 41 and filled with liquid food. In the endless conveyor 41, the pair of carton 25 with a lid can be filled with liquid food at the same time. Further, sterile air is circulated as a sterile medium in the sterile filling chamber to maintain the sterile filling chamber in a sterile state.

  The endless conveyor 41 includes a plurality of pairs of buckets 43 formed at a predetermined pitch in the traveling direction, and the buckets 43 have a height substantially equal to each composite container 15. In addition, in the carton 25 with a lid, a bottom folding portion is formed in advance in order to form a bottom wall after being filled with liquid food. Therefore, when the carton 25 with a lid is inserted into the bucket 43, the bucket 43 is made lower than the carton 25 with a lid so that the bottom folded portion protrudes from the bucket 43.

  By the way, in the endless conveyor 41, an insertion station is set at a predetermined position, in the present embodiment, at the left end position. In the insertion station, an insertion device (not shown) has the lid 22 at the head, and a bucket 43 The carton 25 with a lid is advanced in a state of being opposed to the opening and inserted into the bucket 43.

  A sterilization station is set adjacent to the insertion station. In the sterilization station, an unillustrated spray nozzle is arranged to face the carton 25 with a lid. The spray nozzle sprays a low-concentration hydrogen peroxide gas as a sterilizing agent toward the inner peripheral surface of the carton 25 with a lid at a predetermined timing to sterilize the carton 25 with a lid.

  Further, an ultraviolet irradiation station is set adjacent to the sterilization station, and an ultraviolet light (not shown) is arranged to face the carton 25 with a lid in the ultraviolet irradiation station. The ultraviolet light radiates ultraviolet rays toward the inner peripheral surface of the carton 25 with a lid at a predetermined timing to sterilize the inside of the carton 25 with a lid.

  A drying station is set adjacent to the ultraviolet irradiation station. In the drying station, a hot air nozzle (not shown) is arranged to face the carton 25 with a lid. The hot air nozzle injects hot air toward the inner peripheral surface of the carton 25 with a lid at a predetermined timing to dry the inside of the carton 25 with a lid and remove hydrogen peroxide gas.

  Further, a filling station is set adjacent to the drying station, and the filling nozzle 74 is disposed facing the carton 25 with a lid in the filling station. By the way, the bucket 43 holds the carton 25 with the lid upside down, and the filling nozzle 74 is disposed outside the aseptic filling chamber and is connected to a tank 75 for storing liquid food, at a predetermined timing. Thus, the liquid food supplied from the tank 75 is filled into the carton 25 with the lid body in the inverted state by a predetermined amount. A servo flow meter 76 is disposed between the filling nozzle 74 and the tank 75, and liquid food is weighed by the servo flow meter 76. The filling nozzle 74, tank 75, servo flow meter 76 and the like constitute a filling device.

  A volume flap operation station is set adjacent to the filling station, and a first operation device (not shown) is disposed in the volume flap operation station. The first actuating device narrows the space in the bucket 43, presses the carton 25 with lid from the periphery, and reduces the capacity of the carton 25 with lid.

  A first sealing station is set adjacent to the volume flap operation station, and a folding device and an ultrasonic sealing device (not shown) are disposed in the first sealing station. The folding device folds the bottom folding portion of the carton 25 with a lid projecting from the upper end of the bucket 43 along the fold line, and the sealing device exceeds the seal fin formed by folding the bottom folding portion. Seal with sonic waves.

  In addition, a second sealing station is set adjacent to the first sealing station, and a folding rail having an arc shape (not shown) is disposed in the second sealing station, and the folding rail is arranged while the bucket 43 passes. In addition, the bottom folding part is further folded. In addition, a heating device (not shown) is disposed at the second sealing station, and the heating device sprays hot air toward the sealing portion of the triangular piece formed by folding the bottom folding portion, The first resin film is melted. Further, a pressure welding device (not shown) is provided at the second sealing station, and the pressure welding device includes a flap (not shown) as a seal portion, and the triangular piece portion is pressed by the flap to perform sealing. In this way, the bottom wall b1 (FIG. 1) is formed, and the composite container 15 is completed.

  A second actuating device (not shown) is disposed downstream of the second seal station in the traveling direction of the endless conveyor 41. The second actuating device widens the space in the bucket 43 and places the composite container 15 in a decompressed state. Therefore, even if an external force is applied when the composite container 15 is opened, the liquid food is not pushed out of the composite container 15.

  Further, a take-out station is set downstream of the second operating device in the traveling direction of the endless conveyor 41, and a take-out machine (not shown) is disposed in the take-out station. The take-out machine takes out the composite container 15 from the bucket 43. At this time, the composite container 15 is taken out with the lid 22 facing upward. The empty bucket 43 is transported and sent again to the insertion station.

  In this way, the composite container 15 is completed.

  By the way, as described above, in the composite container 15, the fracture portion p <b> 1 is formed along the circumferential direction of the carton portion 21 so that the lid body 22 and the carton portion 21 can be easily separated.

  Then, the container separation method which isolate | separates the cover body 22 and the carton part 21 is demonstrated.

  FIG. 4 is a first diagram illustrating a first container separation method according to an embodiment of the present invention, FIG. 5 is a second diagram illustrating a first container separation method according to an embodiment of the present invention, and FIG. FIG. 7 is a second diagram illustrating a second container separation method according to an embodiment of the present invention, and FIG. 7 is a second diagram illustrating a second container separation method according to an embodiment of the present invention.

  In the figure, 15 is a composite container, 21 is a carton part, 22 is a lid, 27 is a collar comprising a pyramid part 45 and a cylindrical part 46, 28 is a cap, b1 is a bottom wall, p1 is a fractured part, and m1 to m4 are side walls. It is.

  In the first container separation method shown in FIGS. 4 and 5, when the lid 22 and the carton portion 21 are separated, the ridge line between the side walls m1 and m2 is k1, and the ridge line between the side walls m3 and m4 is k2 ( And the intersections of the ridge lines k1 and k2 and the pyramid portion 45 are ε1 and ε2 (intersection ε2 is not shown), and the vicinity of the intersections ε1 and ε2 is sandwiched from both sides, As shown in FIG. 4, the pyramid portions 45 are pressed against each other so as to be crushed. At this time, not only the collar 27 but also the carton portion 21 is deformed. However, since no force is applied to the lower portion of the carton portion 21, an attempt is made to return to the original shape. As a result, stress is applied to the fracture portion p1, and the fracture portion p1 starts to break.

  Subsequently, when the fracture portion p1 is further broken so that the lid body 22 is peeled off from the carton portion 21, the lid body 22 and the carton portion 21 can be easily separated as shown in FIG. Can do.

  In the second container separation method shown in FIGS. 6 and 7, when the lid 22 and the carton portion 21 are separated, when the intersection of the ridge line k1 and the fractured portion p1 is ε3, the intersection ε3 When the lower vicinity is pressed into the composite container 15, as shown in FIG. 6, the side walls m1 and m2 are bent inward in a triangular shape in the vicinity of the intersection ε3. At this time, since the collar 27 is made of resin, it tries to repel and keep its shape. As a result, stress is applied to the fracture portion p1, and the fracture portion p1 starts to break.

  Subsequently, when the fracture portion p1 is further broken so as to peel the lid body 22 from the carton portion 21, the lid body 22 and the carton portion 21 can be easily separated as shown in FIG.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a perspective view of the composite container in embodiment of this invention. It is a perspective view which shows the manufacturing apparatus of the composite container in embodiment of this invention. It is a conceptual diagram which shows the manufacturing method of the composite container in embodiment of this invention. It is a 1st figure which shows the 1st container separation method in embodiment of this invention. It is a 2nd figure which shows the 1st container separation method in embodiment of this invention. It is a 1st figure which shows the 2nd container separation method in embodiment of this invention. It is a 2nd figure which shows the 2nd container separation method in embodiment of this invention.

Explanation of symbols

15 Composite container 18 Packaging material 21 Carton portion 22 Lid 24 Cylindrical carton 25 Carton with lid b1 Bottom wall p1 Breaking part

Claims (3)

(A) a carton part formed of a packaging material and constituting a box-shaped body;
(B) having a lid made of resin and integrally molded at the upper edge of the carton portion;
(C) A composite container characterized in that a fracture portion is formed in the circumferential direction in the vicinity of the upper edge of the carton portion.   The composite container according to claim 1, wherein the breaking portion is formed by making a cut in a paper base material constituting the packaging material. (A) A rupture portion is formed in advance, and the packaging material cut into a predetermined shape is sealed in the longitudinal direction to form a cylindrical carton;
(B) At one end of the cylindrical carton, a lid is integrally formed by injection molding, and a carton with a lid having an opening at the bottom is formed,
(C) filling the carton with a lid with contents,
(D) Folding the bottom fold and forming the bottom wall by sealing the seal part;
(E) The method for manufacturing a composite container, wherein the fracture portion is formed on one end side of the cylindrical carton.

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