JPS6113980B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a container called a bag-in-box, which is equipped with a bag inside the box and a dispensing tool at a predetermined location.

By the way, some conventional pouring tools consist of a main body located on the outside wall of the bag and an inner ring that fits into the main body from the inside wall of the bag, sandwiching the bag wall. This dispensing tool has the advantage of being able to attach to the container without breaking the bag wall, but high precision is required at the fitting part between the main body and the inner ring, and pinholes etc. may occur in the bag film at the fitting part. This has various drawbacks, such as the mechanism of the assembly machine for automating the fitting between the main body and the inner ring being complicated.

In addition, there are other pouring tools in which a hole is made in the bag wall, a cylindrical portion is passed through the hole, and a flange portion connected to the cylindrical portion is welded to the inner wall surface of the bag. This has the advantage that when installing the dispensing tool, it is easy to position it by inserting it through the hole in the bag film, and it is easy to heat seal because the film faces upward. As a result, it is difficult to eliminate residual contents, and holes are made in the bag wall, making it difficult to transport and transport the container.
Must be tightly sealed when stored.
After installing the pouring tool, mold the bag,
This method has a runner-up problem, such as the bag forming process being troublesome.

The present invention was made in view of the above-mentioned drawbacks of the prior art, and involves rotating the turret, covering the mandrel with a bag, then a box, and finally gluing a spouting tool, and then removing it from the mandrel. The dispensing tool can be easily fixed to the bag wall without using an inner ring, and there is no need to make a hole in the bag.

That is, in the present invention, a) turrets are installed radially,
and intermittently rotating a plurality of mandrels formed into a rectangular parallelepiped.b. Putting a bag over the mandrel at the first stop position of the mandrel.c Putting a bag over the mandrel at the second stop position of the mandrel. further covering the mandrel with a box d Inserting a spouting tool through the hole previously provided in the box at the third stop position of the mandrel and gluing its base to the bag wall e pouring at the fourth stop position of the mandrel To extract the butt-in-box to which the extraction tool has been attached from the upper mandrel.

The gist of this article is a method for manufacturing bag-in-boxes consisting of:

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a bag-in box manufactured by the manufacturing method according to the present invention. In the figure, 10 is a box made of cardboard blank plates, 12 is a synthetic resin bag, and 14 is a pouring tool. The bag and the box are each closed at the bottom, and after the bag is filled with contents in this state, the opening 16 of the bag is closed by heat sealing, and then the flap 1 of the box is closed.
8 is closed and sealed. The container is then transported and stored as is, and when used, the contents are poured out by breaking the seal on the dispensing device without opening the flap of the box.

FIG. 2 shows the dispensing tool of the bag-in-box and its connection to the bag and box.

In the figure, 20 is a bag wall and 22 is a box wall. Further, 24 is a cylindrical portion of the pouring tool, and 26 is a flange portion. The flange portion is for holding the area around the hole 28 in the box wall between the film and the film. A step 30 is provided between the base and the flange portion of the cylindrical portion in contact with the bag wall, and an annular cavity is formed between this step and said base and the bag wall. Adhesive 32 is applied between this annular cavity, which secures the dispensing device to the bag wall.

The adhesive 32 is selected in consideration of the temperature of the liquid contained therein, the temperature change in the place where the container is used, etc., and if the temperature change is not sudden, it is preferable to use a hot melt adhesive. This is because hot melt adhesives can be sprayed linearly from a nozzle, making it easy to apply them to the annular cavity and making them easy to apply to automatic assembly machines.

Further, the outer periphery of the annular cavity is open, but this is to prevent the adhesive from protruding inside the cylindrical portion when the pouring tool is pressed against the bag wall. Therefore, if the amount of adhesive adhered is small, the outer periphery may also be closed to form an annular cavity.

FIG. 3 schematically shows the equipment used for manufacturing the bag-in-box.

In the figure, numeral 34 is a rectangular parallelepiped mandrel, and a plurality of mandrels are installed radially around a shaft 36, and are configured as a turret that can rotate intermittently.

In the illustrated example, four mandrels 34 are provided,
It rotates intermittently every 90 degrees, with each stop acting as a station for a separate operation.

Now, if the position of the mandrel 34a is the first stop position, the bag 12 is now at the mandrel 3.
4a is covered.

Then, when the mandrel 34a rotates to the second stop position, the box 10 is placed over the bag 12. Here, each mandrel 34
A recess 38 is provided on the upper surface of the box 10 in correspondence with the mounting position of the pouring tool 14, and the box 10 is inserted so that the hole 28 is aligned with the recess 38.

Then, when it further rotates to the third stop position, the pouring tool 14 is supplied and the cylindrical part 24 is fed through the hole 28.
is inserted and its base is glued to the wall 20 of the bag. Glue 32 is applied to the annular cavity before the dispensing tool is fed towards the box.

During bonding, as shown in FIG. 4, the base enters the recess 38 of the mandrel, and at the same time the film 20 around it is pushed up. Therefore, the adhesive 32 is hardly pushed out inward of the cylindrical portion 24 and solidifies immediately below the flange portion 26. This means that the feeling of uncleanness due to the adhesive 32 being exposed in the spout can be eliminated, and that the bag wall in the cylindrical portion can be easily broken during use.

Thus, the bag-in-box to which the dispensing tool 14 is fixed is attached to the mandrel 34 at the fourth stop position.
from the opening 1 of the bag immediately if necessary.
The contents are filled from step 6 onwards.

In addition, the number 1 of the stop position of the mandrel,
2, 3, and 4 do not necessarily correspond to the actual stopping positions. For example, if eight mandrels 34 are provided, the first stopping position may be a position rotated by 45 degrees, or a position rotated by 90 degrees. It may be in the same position.

As described above, the bag-in-box manufacturing method according to the present invention involves rotating the turret, covering the mandrel with the bag, then covering the bag with the box, and finally gluing the pouring tool, and then removing it from the mandrel. It is something that we try to do.

Therefore, according to the present invention, a bag-in-box can be efficiently manufactured without using an inner seal or the like and without making holes in the bag wall.

[Brief explanation of the drawing]

The first is a perspective view of a bag-in-box manufactured by the manufacturing method according to the present invention. FIG. 2 is a sectional view taken along the - line in FIG. 1. FIG. 3 is a plan or front view of a turret for carrying out the invention. FIG. 4 is an explanatory diagram of the process of bonding the pouring tool. 10... Box, 12... Buzz, 14...
Pour tool, 28... Box hole, 32... Adhesive, 34... Mandrel, 36... Shaft, 38...
dimple.

Claims (1)

[Claims] 1. A method for manufacturing bag-in-boxes comprising the following matters. a. They are installed radially as turrets,
and intermittently rotating a plurality of mandrels formed into a rectangular parallelepiped.b. Putting a bag over the mandrel at the first stop position of the mandrel.c Putting a bag over the mandrel at the second stop position of the mandrel. further covering the mandrel with a box d inserting a spouting tool through the hole previously provided in the box at the third stop position of the mandrel and gluing its base to the back wall e pouring at the fourth stop position of the mandrel Pulling out the back-in-box to which the extraction tool has been attached from the mandrel. 2. The manufacturing method according to claim 1, wherein the mandrel is provided with a recess into which the base of a pouring tool is inserted.