JP2012062109A - Method of manufacturing container with cylindrical label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a container with a cylindrical label which is securely attached, even when the label has a thin film and a buckling strength being comparatively weak.SOLUTION: While sucking air from a vent hole 14a formed in the side face section 14 of a mandrel 12, a label base material 7 with a thickness range of 6 to 20 μm is wound around the side face section 14 of the mandrel 12, and end parts of the label base material are superposed on each other and connected to form the cylindrical label 6. In a state that the buckling strength of the cylindrical label is set in the range of 0.02 N to 0.3 N, and the position of the cylindrical label formed by the mandrel is held, the container 1 arranged at the upper part or the lower part of the mandrel is moved together with the mandrel 12, and the container 1 is inserted inside the cylindrical label 6 by transposing the container to the position of the mandrel 12. Then, the cylindrical label 6 is subjected to heat shrinkage, and the cylindrical label 6 is attached to the container 1.

Description

  The present invention relates to a method of manufacturing a container with a cylindrical label in which a heat-shrinkable label is mounted on the body, and in particular, a cylindrical shape that can be securely mounted even with a thin film and a relatively weak buckling strength. The present invention relates to a method for manufacturing a labeled container.

  Conventionally, a container made of a polyethylene terephthalate resin or the like with a label printed with a product design, component display, or the like is used. As a method of attaching a label to such a container, Patent Document 1 discloses that a plastic film blank is wound around a mandrel and an overlap portion between the ends of the plastic film is joined to form a plastic sleeve. It is described that the plastic sleeve on the mandrel is pushed up along the mandrel and the plastic sleeve is put on the glass bottle, and then the plastic sleeve is thermally contracted to adhere to the glass bottle.

Japanese Patent Publication No.58-33813

  However, in the method of manufacturing a plastic sleeve disclosed in Patent Document 1, since the lower end portion of a sleeve that is wound around a mandrel and formed into a cylindrical shape is pushed up by a stopper ring and covered with a glass bottle, a sleeve formed of a thin film is used. When used, since the rigidity of the sleeve is lowered, there is a possibility that the sleeve is wrinkled when the sleeve is removed from the mandrel, or the sleeve cannot be put on a predetermined position of the bottle.

  The present invention has been made against the background described above, and an object of the present invention is to provide a method of manufacturing a container with a cylindrical label that can be reliably attached even if the label is a thin film and has a relatively low buckling strength. Is.

  In order to achieve the above-mentioned object, the invention of claim 1 forms a cylindrical label by overlapping and joining the end portions on both sides of a heat-shrinkable label base material, and the cylindrical label is attached to a container. In the manufacturing method of the container with a cylindrical label to be attached, the label base material having a thickness in the range of 6 to 20 μm is wound around the side portion of the mandrel while sucking air from the air hole formed in the side portion of the mandrel. A cylindrical label having a buckling strength in the range of 0.02N to 0.3N is formed by overlapping and joining the end portions of the label base material, and then the position of the cylindrical label is maintained. Then, the container disposed above or below the mandrel is moved upward or downward together with the mandrel to replace the container at the position of the mandrel, whereby the container is placed inside the cylindrical label. After inserting the it it is characterized to cause the tubular label is attached to the tubular label to the container by heat shrinkage.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, in the state in which the container is placed on the upper surface portion of the mandrel, the label base material is wound around the side surface portion of the mandrel to form the cylindrical label And lowering the mandrel on which the container is placed in a state where the lower end portion of the cylindrical label is brought into contact with and held by a stopper member provided below the mandrel, and the container is moved to the cylindrical shape. After the insertion into the label, the cylindrical label is heat-shrinked so that the cylindrical label is attached to the container.

  In addition to the configuration of the invention of claim 1 or 2, the invention of claim 3, when the label substrate is wound around the mandrel to form the cylindrical label, and then the container is moved together with the mandrel. The moving speed of the mandrel is 1 to 40 mm / msec.

  According to the invention of claim 1, after forming the cylindrical label with the mandrel, when the cylindrical label is put on the container, the position of the cylindrical label is maintained (the cylindrical label is stationary), Since the container is moved to the position of the mandrel so that the container is replaced and the container is inserted into the cylindrical label, the container is covered with the cylindrical label, so that no extra force is applied to the cylindrical label and the shape is stable. Since the thickness of the label base material of the cylindrical label is in the range of 6 to 20 μm, the buckling strength of the cylindrical label in the state of being formed into a cylindrical shape is in the range of 0.02N to 0.3N. Even so, it is possible to prevent the cylindrical label from being wrinkled or deformed.

  As a result, the thickness of the label substrate of the cylindrical label can be reduced, and the buckling strength of the cylindrical label does not have to be increased more than necessary, thereby reducing the material cost of the cylindrical label. it can.

  According to the invention of claim 2, in the state where the container is placed on the upper surface of the mandrel, the cylindrical label is molded, and the lower end of the cylindrical label is brought into contact with and held by the stopper member provided below the mandrel. In this state, by lowering the mandrel on which the container is placed and inserting the container into the cylindrical label, a stopper member that holds the position of the cylindrical label need only be provided below the mandrel. Therefore, the manufacturing equipment can be simplified.

  According to the invention of claim 3, after the cylindrical label is formed with the mandrel, the moving speed of the mandrel when the container is moved together with the mandrel is 1 to 40 mm / msec, so that the cylinder is relatively fast. A labeled container can be manufactured, and the occurrence of buckling of the cylindrical label can be sufficiently suppressed even at such a production rate.

It is process drawing which shows the process in which a cylindrical label is shape | molded and fitted to a container in this invention. It is the schematic for demonstrating the apparatus which shape | molds a cylindrical label by pulling out a label base material from a roll, and winding around a mandrel.

  The present invention relates to a method of manufacturing a container with a cylindrical label in which a heat-shrinkable cylindrical label is mounted on a body of a bottle-type container filled and sealed with a beverage or the like. FIG. 1 schematically shows an example of a container with a cylindrical label manufactured according to the present invention. As the container 1 used in the present invention, a synthetic resin container made of polyethylene terephthalate resin, polyethylene resin, or the like, or a metal container made of aluminum alloy, a surface-treated steel plate, or the like can be used. In the present embodiment, the container 1 made of polyethylene terephthalate resin is gradually contracted from the disc-shaped bottom 2, the cylindrical body 3 extending upward from the peripheral edge of the bottom 2, and the upper end of the body 3. A bottle-shaped container having a shoulder portion 4 having a diameter and a mouth / neck portion 5 connected to the upper end of the shoulder portion 4 can be suitably used.

  The cylindrical label 6 used in the present invention is formed by overlapping and joining the ends of the heat-shrinkable label base material 7 into a cylindrical shape. As the label base material 7, a polyethylene terephthalate or the like is used. Single- or multi-layer heat shrinkability of polyester resins, olefin resins such as polyethylene and polypropylene, styrene resins such as styrene-butadiene copolymers, thermoplastic resins such as cyclic olefin resins and vinyl chloride resins Films can be used as appropriate.

  The cylindrical label 6 of the present invention has a buckling strength in a state in which the end of the label base material 7 is joined to each other and formed into the cylindrical label 6 in the range of the thickness of the label base material 7 of 6 to 20 μm. Is set to 0.02N to 0.3N.

  The buckling strength in the present invention is the difficulty of bending when a force is applied in the axial direction of the cylindrical label 6. In the buckling strength measuring method of the present invention, the cylindrical label 6 formed into a cylindrical shape having an axial length of 120 mm and an inner diameter of 66 mm is used as a cylindrical jig having a height of 60 mm and an outer diameter of 65.8 mm. Covered on the cylindrical label 6 in a covered state, the acrylic has a square shape with a thickness of 0.3 mm, a side of 67 mm, and a weight of 1.6 g so as to completely cover the upper end of the cylindrical label 6. A load is measured when a part of the cylindrical label 6 is bent when a load is applied to the center of the thin plate and a value obtained by adding the weight of the thin plate to the measured load. This is the buckling strength in the present invention.

  FIG. 2 shows a part of an apparatus for manufacturing the container with a cylindrical film described above. In the manufacturing apparatus according to the present invention, a label base material supply device 8 for supplying a label base material 7 and a label base material A cylindrical label forming device 9 for forming 7 into a cylindrical shape, and a cylindrical label mounting device (not shown) for thermally contracting the cylindrical label 6 and mounting it on a container.

  The label base material supply device 8 has a stand 8a for holding the roll-shaped strip-shaped label base material 7, and feeds the label base material 7 drawn from the stand to the cutter 10 through the guide rollers 8b and 8c. It is configured. The cutter 10 is rotated by sandwiching the label base material 7 between the cutter roller 10b having a cutting blade 10a arranged on the outer peripheral surface at intervals equal to the length of the label base material 7 to be cut, and the cutter roller 10b. The receiving roller 10c includes a plurality of recesses 10d into which the cutting edge of the cutting blade 10a enters at regular intervals on the outer peripheral surface of the receiving roller 10c. Further, the label base material supply device 8 includes a rotating drum 11 that receives the label base material 7 cut to a predetermined length from the roller 10 c and delivers it to the cylindrical label forming device 9. The rotating drum 11 is a cylindrical body that rotates by bringing the outer peripheral surface into contact with the receiving roller 10c. The rotating drum 11 has an outer diameter larger than that of the receiving roller 10c, and rotates with the receiving roller 10c to have a predetermined length. The label base material 7 that is cut into two and held on the outer peripheral surface of the receiving roller 10c is received from the receiving roller 10c, and the label base materials 7 are held on the outer peripheral surface at a predetermined interval. . The label base material 7 is held and released by the receiving roller 10c and the rotating drum 11 by vacuum suction and release thereof.

  The configuration of the cylindrical label forming device 9 disposed on the downstream side of the label base material supply device 8 will be described. The cylindrical label forming device 9 rotates around an axis parallel to the rotation axis of the rotary drum 11. A rotating table (not shown) is provided, and a plurality of mandrels 12 for winding the label base material 7 around the periphery of the rotating table and forming it into a cylindrical shape are provided. Each mandrel 12 is formed in a cylindrical shape having an outer diameter that is the same as or slightly larger than the outer diameter of the container body 3, and an upper surface portion 13 on which the container 1 can be placed as shown in FIG. A side surface portion 14 having a size capable of holding the label base material 7 (an axial length longer than the width of the label base material 7 in the container height direction) and having a plurality of air holes 14a. Have. Each mandrel 12 is configured to be movable in the conveying direction, vertically movable, and further rotatable (spinned) in the circumferential direction of the mandrel 12 around the axis of the mandrel 12. In this embodiment, the ascending and descending speed of the mandrel 12 is set in a range of 1 to 40 mm / msec, and is set in a range of 2 to 30 mm / msec in consideration of the production speed and product quality. It is preferable.

  An air passage (not shown) communicating with each air hole is formed inside the mandrel 12, and the air passage is connected to an air control device (not shown) provided outside the mandrel 12. The air control device is configured such that air suction and ejection can be arbitrarily switched with respect to the air hole 14 a of the mandrel 12. The switching may be performed by detecting the position of the mandrel 14 and electrically controlling the valve, or may be performed by a so-called mechanical valve mechanism that switches at the rotation angle of the turntable in the cylindrical label forming apparatus 9. .

  An annular stopper member 15 is provided around the mandrel 12, and the inner diameter of the stopper member 15 is set slightly larger than the outer diameter of the mandrel 12, and the mandrel 12 is disposed inside the stopper member 15. It is configured so that it can be inserted. When the mandrel 12 that can move up and down is located at the top dead center, the stopper member 15 is located below the mandrel 12, and when the mandrel 12 is located at the bottom dead center, the upper surface 15a of the stopper member 15 is the mandrel. It is comprised so that it may be located in the substantially same height as the upper surface part 13 of 12.

  Above each mandrel 12, the upper part of the cap 16 of the container 1 mounted on the upper surface portion 13 of the mandrel 12 is configured to be movable in the conveying direction in synchronization with the mandrel 12 and movable up and down. Holding members 17 that can be held are respectively provided. That is, the holding member 17 is configured to rotate integrally with the above-described turntable and move up and down according to a rotation angle from a predetermined reference position, and further, the holding member 17 is centered on the axis of the holding member 17. As described above, in conjunction with the mandrel 12, the holding member 17 can be rotated (rotated) in the circumferential direction.

  At positions adjacent to the side surface portion 14 of each mandrel 12, a joining device 18 that is movable along the transport direction in synchronization with the mandrel 12 is provided. The joining device 18 includes a heat seal bar 19 that can move back and forth toward the mandrel 12 and extends in the axial direction of the mandrel 12, and the label base material on which the heat seal bar 19 heated by electric heat is superposed. By pressing against the end portion 7, the end portion of the label base 7 can be joined and the cylindrical label 6 can be formed. In addition, as a joining method of the edge part of the label base material 7, you may make it join by sealing methods, such as not only a heat seal but an impulse seal, an ultrasonic seal, and a high frequency seal.

  In the cylindrical label mounting device (not shown), the cylindrical label 6 is mounted on the container 1 by heat-shrinking the cylindrical label 6 placed on the container. The cylindrical label mounting device may be a well-known heat-shrinkable heating device, and heat-shrinkable by blowing hot air or steam onto the cylindrical label 6 placed on the container 1 inside the tunnel-shaped heating unit. The cylindrical label 6 is heated and shrunk, and the cylindrical label 6 is attached to the container 1 in close contact with the container 1.

  In the manufacturing method of the container with a cylindrical label of the present invention using the manufacturing apparatus as described above, the container 1 filled with the contents and sealed by the cap 16 is placed on the upper surface portion 13 of the mandrel 12. The upper portion of the cap 16 is conveyed while being held by the holding member 17. At this time, the mandrel 12 that can move up and down is disposed at the position of the top dead center. On the other hand, the label base material 7 is cut into a length slightly longer than the peripheral length of the container 1 by the label base material supply device 8, and is sucked and held one by one on the rotating drum 11 adjacent to the label mounting device. The label substrate 7 held on the rotating drum 11 is brought into contact with the mandrel 12 in a state where air is sucked from the air hole by the air control device, so that the mandrel 12 rotates as the rotating drum 11 rotates. Then, the label base material 7 is wound around the side surface portion 14 of the mandrel 12, and the label base material 7 is adsorbed and held on the mandrel 12. The other end of the label substrate 7 wound around the mandrel 12 is overlapped with one end of the label substrate 7, and the heat seal bar 19 of the joining device 18 is advanced toward the overlapping portion of the label substrate 7 and pressed. Thus, the overlapping portion is welded and joined, and the cylindrical label 6 is formed.

  After the cylindrical label 6 is formed, the setting of the air control device is switched so as to eject air, the air is ejected from the air hole 14a of the mandrel 12, and the cylindrical label 6 held by the mandrel 12 is held. In addition to releasing, a gap is formed between the mandrel 12 and the cylindrical label 6. In addition, when the buckling strength of the cylindrical label 6 is comparatively strong, it is sufficient to stop the air suction without ejecting air from the air hole. Next, the mandrel 12 is lowered from the position of the top dead center, and the lower end of the cylindrical label 6 comes into contact with the annular stopper member 15 provided below the mandrel 12, so that the height position is maintained. On the other hand, the container 1 placed on the mandrel 12 and its upper surface portion 13 passes through the inside of the stopper member 15 until the upper surface portion 13 of the mandrel 12 and the upper surface 15a of the stopper member 15 are at the same height. Be lowered. Thereby, the trunk | drum 3 of the container 1 mounted in the upper surface part 13 of the mandrel 12 is inserted in the inside of the cylindrical label 6, and it will be in the state which covered the cylindrical label 6 on the container trunk | drum 3. Then, the container body 3 is covered with the cylindrical label 6 and conveyed to the cylindrical label mounting device. The cylindrical label 6 is heated and thermally contracted, so that the cylindrical label 6 is mounted on the container 1. Manufactures containers with cylindrical labels.

  In this embodiment, the container 1 is arranged above the mandrel 12 and the mandrel 12 and the container 1 are lowered so that the container 1 is replaced at the position of the mandrel 12. The container 1 may be replaced with the position of the mandrel 12 by arranging the container 1 below the mandrel 12 and raising the mandrel 12 and the container 1. In this case, the container 1 is suspended from the lower surface portion of the mandrel 12, or a base that moves up and down in synchronization with the mandrel 12 is provided below the mandrel 12, and the container 1 is placed on the base. In this state, the cylindrical label 6 is formed with the mandrel 12, and the mandrel 12 and the container 1 are raised while holding the upper end portion and the lower end portion of the formed cylindrical label 6 with the stopper member 15. Thus, the container 1 can be replaced at the position of the mandrel 12.

  According to such a method for manufacturing a container with a cylindrical label, after the cylindrical label 6 is formed by the mandrel 12, the position of the cylindrical label 6 is retained when the container 1 is covered with the cylindrical label 6 (cylinder). In a state where the cylindrical label 6 is stationary), the container 1 is moved to the position of the mandrel 12 so as to replace the container 1 and the container 1 is inserted into the cylindrical label 6 so that the container 1 is covered. Therefore, an extra force is not applied to the cylindrical label 6 and the shape can be stabilized, so that the label base 7 of the cylindrical label 6 is formed into a cylindrical shape with a thickness of 6 to 20 μm. Even if the buckling strength of the cylindrical label 6 in the state is in the range of 0.02N to 0.3N, the cylindrical label 6 can be prevented from being wrinkled or deformed.

  As a result, the thickness of the label base material 7 of the cylindrical label 6 can be reduced, and the buckling strength of the cylindrical label 6 does not have to be increased more than necessary, so the material cost of the cylindrical label 6 is low. Can be.

  That is, contrary to the present invention, when the cylindrical label 6 is moved and the cylindrical label 6 is put on the container 1 while the container 1 is stationary, the production speed (moving speed of the cylindrical label 6) is increased. Then, in the cylindrical label 6 formed from the thin film label base material 7 having a thickness in the range of 6 to 20 μm, the cylindrical label 6 behaves irregularly due to the flow of air accompanying the movement of the cylindrical label 6. As a result, the container 1 and the cylindrical label 6 may come into contact with each other and the cylindrical label 6 may be deformed.

  In addition, regarding the buckling strength of the cylindrical label 6, if the buckling strength is weaker than 0.02N, the strength is too weak and the label may be wrinkled when the cylindrical label 6 is mounted on the container 1, If it is greater than 0.3N, the thickness of the label substrate 7 becomes thick, which may increase the material cost.

  Further, in the present invention, since the cylindrical label 6 itself is not moved, the cylindrical label 6 and the container outer surface can be used even when used for a synthetic resin container provided with many uneven portions on the outer surface of the container by reinforcing ribs or the like. Since it hardly interferes, the cylindrical label 6 can be smoothly put on the container 1.

  In addition, the cylindrical label 6 is formed in a state where the container 1 is placed on the upper surface portion 13 of the mandrel 12, and the lower end portion of the cylindrical label 6 is brought into contact with the stopper member 15 provided below the mandrel 12. While holding, the mandrel 12 on which the container 1 is placed is lowered, and the container 1 is inserted into the cylindrical label 6, whereby the stopper member 15 that holds the position of the cylindrical label 6 is moved to the mandrel 12. Therefore, the manufacturing equipment can be simplified.

  Furthermore, after forming the cylindrical label 6 with the mandrel 12, the moving speed of the mandrel 12 when moving the container 1 together with the mandrel 12 is 1 to 40 mm / msec, so that the cylindrical label is attached at a relatively high speed. While being able to manufacture a container, generation | occurrence | production of the buckling of the cylindrical label 6 can fully be suppressed also in such a production rate.

  In other words, if the lowering speed of the mandrel 12 is slower than 1 mm / msec, there is a problem that the production speed of the container with a cylindrical label becomes slow and the productivity is lowered, while the lowering speed of the mandrel 12 is If it is faster than 40 mm / msec, the cylindrical label 6 wound around the mandrel 12 does not show a stable behavior when the mandrel 12 is lowered, and the cylindrical label 6 interferes with the container 1 placed on the mandrel 12. There is a risk of buckling.

  DESCRIPTION OF SYMBOLS 1 ... Container, 6 ... Cylindrical label, 7 ... Label base material, 12 ... Mandrel, 13 ... Top surface part of (mandrel), 14 ... Side surface part of (mandrel), 14a ... Air hole of (mandrel), 15 ... Stopper Element.

Claims (3)

In the manufacturing method of the container with a cylindrical label, the ends on both sides of the heat-shrinkable label base material are overlapped and joined to form a cylindrical label, and the cylindrical label is attached to the container.
While sucking air from the air holes formed on the side surface of the mandrel, the label base material having a thickness in the range of 6 to 20 μm is wound around the side surface part of the mandrel, and the ends of the label base material are overlapped with each other. By joining them together, a cylindrical label with a buckling strength in the range of 0.02N to 0.3N is formed, and then placed above or below the mandrel with the position of the cylindrical label held. After the container is inserted into the interior of the cylindrical label by moving the container upward or downward together with the mandrel and replacing the container at the position of the mandrel,
A method for producing a container with a cylindrical label, wherein the cylindrical label is thermally shrunk to mount the cylindrical label on the container.   In the state where the container is placed on the upper surface of the mandrel, the cylindrical label is formed by winding the label base material around the side surface of the mandrel, and the cylindrical member is formed on a stopper member provided below the mandrel. With the lower end of the label in contact with and holding, the mandrel on which the container is placed is lowered, the container is inserted into the cylindrical label, and then the cylindrical label is thermally contracted to The manufacturing method of the container with a cylindrical label according to claim 1, wherein the cylindrical label is attached to the container.   The moving speed of the mandrel when the container is moved together with the mandrel after the label base material is wound around the mandrel to form the cylindrical label is 1 to 40 mm / msec. A method for producing a container with a cylindrical label according to 1 or 2.

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