JP3647049B2 - Sealed container manufacturing method and manufacturing apparatus - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a sealed container manufacturing method and a manufacturing apparatus, and more particularly to a sealed container manufacturing method and a manufacturing apparatus capable of improving the sealing performance of the sealed container.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a sealed container is known in which a liquid body is filled from the opening side in a container body whose bottom is sealed with a bottom material. On the opening side of the container body filled with the contents, a lid member having a bent side plate is fitted, and a heat seal layer (polyethylene or the like) on the outer surface of the bent side plate and a heat seal on the inner surface of the body portion of the container main body. The layers are heat sealed. In this case, one side end of the container main body protrudes from the bent side plate, and the one side end of the container main body is then bent inward. And the bent part is adhere | attached on a bending side board.
[0003]
[Problems to be solved by the invention]
As described above, a heat seal layer such as polyethylene is applied in advance to the inner surface of the container body and the outer surface of the bent side plate. When bonding the bent portion of the container body inward to the bent side plate, hot air is blown onto the inner surface of the body of the container body to melt the heat seal layer on the inner surface of the container body, and then the container body is folded. The bent part and the bent side plate are bonded.
[0004]
However, when the heat seal layer on the inner surface of the container body is melted by hot air and the bent portion of the container body and the bent side plate are bonded by the heat seal layer, the adhesion is not achieved when the heat seal layer is wetted by the liquid contents. Insufficient liquid content may leak outside.
[0005]
The present invention has been made in consideration of such points, and the bent part of the container body formed by bending one side end of the container body inward is surely attached to the bent side plate of the lid. It aims at providing the manufacturing method and manufacturing apparatus of a sealed container which can be made to adhere | attach and can improve a sealing performance.
[0006]
[Means for Solving the Problems]
The present invention fills the contents from one side of a container body that is open on one side and sealed on the other side, and a lid member having a bent side plate is provided on one side of the container body. Inserted so as to protrude from the bent side plate, heat-seal the bent side plate and the body of the container body, and a hot melt type near the edge of the end of the bent side plate heat-sealed to the body of the container body Apply an adhesive over the entire circumference, bend one end of the container body inward, and bond the bent one end to the bent side plate via a hot-melt adhesive. A sealed container manufacturing method, a filling device for filling contents from one side of a container body that is open on one side and sealed on the other side, and a bent side plate on one side of the container body. The side of the container body protrudes from the bent side plate. A fitting device, a heat seal device for heat-sealing the bent side plate and the body portion of the container body, and a hot melt near a peripheral edge of the bent side plate heat-sealed to the body portion of the container body. A coating device for coating the entire circumference of the mold adhesive, a bending device for bending one side end of the container body inward, and one side end of the container body via a hot melt adhesive An apparatus for manufacturing a sealed container, comprising: a sealing device for bonding to the bent side plate.
[0007]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0008]
1 to 4 are views showing a manufacturing method and a manufacturing apparatus of a sealed container according to the present invention.
[0009]
Among these, FIG. 1 is a figure which shows the manufacturing process of a sealed container, and in FIG. A truncated cone-shaped container body 1 is placed and held on a holding table 5. The container body 1 has a structure that expands upward. And the filling nozzle 6 is inserted from the upper part of the container main body 1, and a liquid content (not shown) is filled. In this case, the holding device 5 and the filling nozzle 6 constitute a filling device.
[0010]
Next, as shown in FIG. 1B, the container main body 1 filled with the liquid content moves to the holding table 7. Accordingly, the lid member 2 is conveyed from above the container body 1 by the suction plate 8, and the lid member 2 is fitted on the upper side of the body 1 a of the container body 1. The lid member 2 has a bent side plate 4 that is bent upward at the periphery thereof, and when the lid member 2 is fitted into the trunk portion 1a, the upper end portion (upper end portion) of the trunk portion 1a. ) Protrudes upward from the end 4 a of the bent side plate 4. In this case, the holding device 7 and the suction plate 8 constitute a fitting device.
[0011]
Next, as shown in FIG. 1 (c), the container body 1 and the lid member 2 are moved to the holding base 9, and the inner surface of the body portion 1a and the outer surface of the bent side plate 4 are connected to the seal inner mold 10 and the seal outer mold 11. Heat sealed. That is, the body portion 1a of the container body 1 has a polyethylene / paper / polyethylene layer structure, and the lid member 2 having the bent side plate 4 faces the paper from the upper side to the lower side (from the inner side to the outer side). It has a layer structure. And the polyethylene layer of the bending side plate 4 and the polyethylene layer of the trunk | drum 1a are heat-sealed. In this case, the holding device 9, the seal inner mold 10 and the seal outer mold 11 constitute a seal device.
[0012]
Next, as shown in FIG. 1 (d), the container body 1 and the lid member 2 are moved to the holding table 12. And silicon is apply | coated to the outer surface side of the trunk | drum 1a upper end part above the edge part 4a of the bending side board 4 with the silicon | silicone application | coating apparatus 13, and this upper end part is made easy to bend.
[0013]
Next, as shown in FIG. 1 (e), the container body 1 and the lid member 2 are moved to the holding table 14. Subsequently, the first curl mold 15 is lowered from above the container body 1, and the curl mold 15 slightly bends the upper end portion of the body portion 1 a inward. In this case, the holding table 14 and the first curl mold 15 constitute a pre-bending device.
[0014]
Next, as shown in FIG. 1 (f), the container body 1 and the lid member 2 are moved to the holding table 16. Subsequently, the container body 1 is lifted by raising the holding table 16, and the hot melt type adhesive 44 (see FIG. 2) is applied to the vicinity of the end 4 a of the bent side plate 4 by the hot melt nozzle 17. Here, the vicinity of the end 4a of the bent side plate 4 refers to the inner surface of the body 1a above the end 4a and the inner surface of the bent side plate 4 below the end 4a, and the vicinity of the end 4a. The hot-melt adhesive 44 is made of a polyethylene-based adhesive and functions to bond the body 1a and the bent plate 4 as described later.
[0015]
In this case, a coating device is constituted by the holding table 16 and the hot melt nozzle 17, which will be described in detail later.
[0016]
Next, as shown in FIG. 1G, the container body 1 and the lid member 2 are moved to the holding base 18, and the second curl mold 19 is lowered from above the container body 1. The upper end portion of the body portion 1a is bent completely inward by the second curl mold 19. In this case, the holding device 18 and the second curl mold 19 constitute a folding device.
[0017]
Next, as shown in FIG. 1 (h), the container body 1 and the lid member 2 are moved to the holding table 20. Next, between the sealed outer mold 22 and the knurl 21, a portion (folded portion) 45 bent inward of the body portion 1 a and the bent side plate 4 are bonded via a hot-melt adhesive 44. (See FIG. 2). FIG. 2 is a partially enlarged view of FIG. As shown in FIG. 2, the bent portion 45 of the body portion 1 a and the bent side plate 4 are pressed between the sealed outer mold 22 and the knurl 21, and the bent portion is bonded by the bonding function of the hot melt adhesive 44. 45 can be securely bonded to the bent side plate 4. In this way, a sealed container composed of the container body 1 and the lid member 2 in which the liquid contents are stored is obtained. In this case, the holding device 20, the knurling 21, and the sealing outer mold 22 constitute a sealing device.
[0018]
In addition, as shown in FIG. 3, the hot melt reservoir 46 can be formed between the trunk | drum 1a and the bending part 45 by forming the step part 21a drawn in inward in a radial direction in the upper part of the knurl 21. it can. By providing this hot melt reservoir 46, it is possible to prevent excess hot melt adhesive 44 from being discharged from below the bent portion 45 to the outside.
[0019]
In the above embodiment, the container body 1 has a structure that expands upward. However, a straight cylindrical structure or a structure that narrows upward may be used.
[0020]
Next, the coating apparatus will be described with reference to FIG.
[0021]
The coating device includes a holding table 16 that holds the container body 1 and a hot melt nozzle 17 that ejects hot melt in the vicinity of the end 4 a of the bent side plate 4. The body 1 of the container body 1 is supported by the moving plate 30, and the container body 1 is moved by the intermittent rotation of the moving plate 30.
[0022]
A rotating shaft 23 is connected to the lower part of the holding device 16, and an outer cylinder 31 is disposed on the outer periphery of the rotating shaft 23. The outer cylinder 31 is rotatably supported by a base 33 via a bearing 42, and a driven gear 25 is fitted to the outside of the outer cylinder 31. The driven gear 25 is driven by the drive gear 27 rotated by the motor 29 via the connecting means 28, and the outer cylinder 31 is thus rotated.
[0023]
The rotation of the outer cylinder 31 is transmitted to the rotary shaft 23 via ball splines 32a and 32b. By the ball splines 32a and 32b, the rotating shaft 23 and the outer cylinder 31 can be rotated together in a state in which they can slide in the axial direction.
[0024]
A cam follower 36 that drives the rotary shaft 23 in the vertical direction (axial direction) is fixed to the lower portion of the rotary shaft 23.
[0025]
Next, the operation of the coating apparatus having such a configuration will be described.
[0026]
The container body 1 and the lid member 2 are stopped at the coating device by the intermittent rotational movement of the moving plate 30.
[0027]
Subsequently, the rotating shaft 23 is raised by the cam follower 36 and stopped at a predetermined position. In this case, the container main body 1 is lifted by the holding base 16, and the hot-melt nozzle outlet 17 a comes near the end 4 a of the bent side plate 4. Next, the drive gear 27 is rotated by the motor 29, and the rotation of the drive gear 27 is transmitted to the outer cylinder 31 via the connecting means 28 and the driven gear 25, and the outer cylinder 31 rotates. Next, the rotation shaft 23 is rotated by the rotation of the outer cylinder 31, and the container body 1 is rotated. Then, at a predetermined timing after the sensor 41 detects the container body 1, the hot melt adhesive is ejected from the hot melt nozzle outlet 17 a, and the hot melt adhesive is bonded to the vicinity of the end 4 a of the bent side plate 4 over the entire circumference. The agent is applied.
[0028]
【The invention's effect】
As described above, according to the present invention, the bent portion of the container body can be reliably bonded to the bent side plate of the lid material by the bonding function of the hot melt adhesive. For this reason, it can prevent that the contents in a container main body leak outside.
[Brief description of the drawings]
FIG. 1 is a process chart showing a method for producing a sealed container according to the present invention.
FIG. 2 is a partially enlarged view of FIG.
FIG. 3 is a view similar to FIG. 2 showing a knurl having a stepped portion.
FIG. 4 is a side sectional view showing an outline of a coating apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container body 2 Cover material 3 Bottom material 4 Bending side plate 6 Filling nozzle 8 Adsorption plate 10 Seal inner mold 11 Seal outer mold 15 First curl mold 17 Hot melt nozzle 19 Second curl mold 21 Knurl 22 Sealed outer mold

Claims (2)

Fill the contents from one side of the container body that is open on one side and sealed on the other side,
On one side of the container body, a lid member having a bent side plate is fitted so that one end of the container body protrudes from the bent side plate,
Heat-sealing the bent side plate and the body of the container body,
A hot melt adhesive is applied over the entire periphery in the vicinity of the peripheral edge of the bent side plate heat-sealed to the body of the container body,
Bending one side end of the container body inward,
A method of manufacturing a sealed container, comprising: bonding the bent one side end portion to the bent side plate through a hot melt adhesive. A filling device for filling the contents from one side of the container body which is open on one side and sealed on the other side;
On one side of the container main body, a fitting having a bent side plate, and a fitting device for fitting one side end of the container main body to protrude from the bent side plate,
A heat seal device for heat-sealing the bent side plate and the body portion of the container body;
An applicator for applying a hot-melt adhesive over the entire periphery in the vicinity of the peripheral edge of the bent side plate heat-sealed to the body of the container body;
A bending device that bends one end of the container body inward;
A sealing device for bonding one end of the container body to the bent side plate via a hot-melt adhesive;
An apparatus for manufacturing a sealed container, comprising:

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