JPS6127245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a bag-in box filled with contents.

That is, during the bag making flow process, a valve flange is welded to a predetermined position on an inner bag film to form an inner bag with a valve. The process of attaching the inner bag to the carton blank by aligning it with the valve mounting hole of the carton blank and attaching the back of the carton blank, and raising the back of the carton and blowing sterile air or heated air into the inner bag to inflate the inner bag. , a step of assembling the carton, a step of filling the contents from the valve of the assembled carton blank, and a step of capping the valve of the carton filled with the contents with a nozzle with a sealing membrane set in advance and sealing it by high-frequency induction heating. The present invention provides a method for manufacturing a bag-in box filled with contents consisting of:

According to the present invention, the carton can be assembled with the inner bag already inflated, the contents can then be filled through the valve, and the valve can be sealed after filling, and the carton and the inner bag can be sealed. It is characterized by the fact that bonding, carton assembly, filling and sealing of the contents into the carton can be carried out rationally using a series of devices.

The embodiments shown in the drawings will be described below.

First, for convenience of explanation, the structure of the inner bag will be explained.

Figures 1 and 2 show a cutaway drawing and a plan view of the inner bag, which is sealed on all sides and is formed from two stacked films a and b. The film material is made of OPP (stretched polypropylene)/KON (vinylidene coated stretched nylon/PE (polyethylene)), and the outer surface of the bag made of OPP (stretched polypropylene) is subjected to electrical discharge treatment.

1 is the inner bag, 1a is the bag body, 2 is the bottom seal, 3 is the top seal, and 4 is the side seal. The top seal 3 has a ladder shape due to the V seal 3'.

Reference numeral 5 designates a valve made of polyethylene, the flange 5a of which is welded to the inner surface of the inner bag film a.

This valve 5 has a nozzle 6 as shown in FIG.
is inserted.

As shown in FIG. 4, the nozzle 6 consists of a large diameter part 6a and a small diameter part 6b, and the large diameter part 6a is formed on the inner surface of the cylindrical wall, and a female thread 6c is formed on the outer surface of the cylindrical wall of the valve 5 and is screwed into the male thread 5b. be done. A sealing film 7 is set on the inner surface of the horizontal joint between the large diameter part 6a and the small diameter part 6b. It is designed to be held between the top edge of the wall.

Further, a male thread 6c is formed on the outer surface of the small diameter portion 6b, into which a cap (not shown) is screwed, and an edge 6d for receiving an opening stopper (not shown) is formed at the lower end of the inner surface of the cylindrical wall of the small diameter portion 6b.

In addition, 6e is a carton presser formed protruding from the large diameter part 6a.

The nozzle 6 is set on the valve 5 as described above, but when the nozzle 6 is set on the valve 5, a cap may be attached to the nozzle in advance.

When the valve and nozzle are made of PE, the sealing film 7 is made of a PE/A/PE laminate, and after the nozzle is set on the valve with a screw, the nozzle and valve film are welded together by high-frequency induction heating. and integrate.

In any case, it is necessary that both sides of the membrane 7 be made of the same material as the nozzle 6 and the valve 5, and of a material that can be welded.

Next, the bag-making machine that forms the inner bag as described above will be explained based on Figs. 6, 7, 8, and 9. This is a machine that can make bags in a two-stage system from two layers of films a and b. As shown in FIG. 10, one has a V-seal 3' formed on the top seal 3, but the other has no V-seal 3', resulting in a rectangular top seal 3.

In FIGS. 6 and 7, reference numeral 8 indicates the paper hanging device section, and since the inner bag film consists of three layers of OP/KON/PE, three pairs of take-up rolls 9, one for each upper and lower film, respectively. 10,11 and 12,1
3 and 14 are mounted on shafts.

The film pulled out from each take-up roll is attached to each guide roll portion 9', 10', 11' and 1.
2', 13', 14' to the paper feed dancer roll section 1
5.

The upper and lower films are stacked in three layers by the guide roll parts 16 and 17 of the paper feed dancer roll part 15, and the upper film a is first stacked in the hole punching device part 1
The valve mounting hole is punched using the punch number 8.

Next, the valve 5 stored in the auxiliary hopper 20 shown in FIG. Sealed.

The upper film a and the lower film b, which have been sealed with a cap, are sterilized together in the next sterilizer section 23, and passed through air release rolls 24, 24, and then in the next top-bottom sealing device 25, both films a and b are sterilized from the top to the bottom. The parts are sealed 3,2.

The films a and b whose top and bottom parts are sealed are sealed at the side 4 part by the next side sealing device 26. Then, a V-seal 3' is made by the V-seal device 27, and the guide roll 2
8, 28, 28 to the next laser slit device 2
At part 9, cut the center of the two potom seals 2 and 2 parts c. Next, the connecting portions of the bags are cut by the cutting device 30, and the cut bags are discharged by the delivery conveyor device 31.

Among the above devices, the hole punch device 18, the side seal device 26, the V seal device 27, and the cut device 30 can be moved and adjusted according to the size of the bag.

Note that 32 in Figures 8 and 9 is a fixed step;
33 is a transverse hanger step, 34 is a brake control box, 35 is an air valve unit, 3
Reference numeral 6 indicates a cooling water manifold, 37 a control operation box, and 38 a counter operation box.

Next, the process of assembling the inner bag 1 produced in the above manner onto the carton blank 40 will be described with reference to FIGS. 11 and 12.

In FIG. 11A, the carton blank 40 in the unfolded state has side plates 43 and 4 on the left and right sides of the front plate 41.
2, a rear plate 44 is attached to the left side plate 43, and an adhesive piece 45 is attached to the rear plate 44 to assemble it into a box shape, and each of the front plate, side plate, and rear plate has a top flap 45, 46, 47, 51 and bottom flaps 48, 49, 50, 52. and,
A valve mounting hole 53 is punched out in advance in the front plate 41 during blank punching.

The above-mentioned carton blank 40 has the above-mentioned inner bag at the valve position where the valve 5 of the inner bag 1 supplied to the upper surface (actually inside the carton) matches the valve mounting hole 53 of the carton as shown in FIG. 11B. Both are pasted together at the periphery.

Next, attach the adhesive piece 45 shown in FIG.
The back of the carton is folded for pasting.
That is, the right side plate 42 and the rear plate 44 are folded toward the front plate 41 so as to wrap around the inner bag 1 as shown by the arrow in the figure.

Next, in FIG. 11D, carton back pasting is performed in which the pasting piece 45 is pasted to the back plate 44.

After the carton spine has been pasted as described above, the carton blank 40 is lifted up in FIGS. 12A to 12B. As shown in FIG. 12C, the lifted carton blank 40 has its top flaps 45, 46, 47, 51 and bottom flaps 48, 49, 50, 52 reversely folded as shown by the arrows in the figure to separate the top and bottom parts. Open your mouth.

Next, as shown in FIG. 12D, the sterile air blowing nozzle 55 is inserted into the valve 5 and the compressor 5 is
Sterile air is blown into the inner bag 1 from the inner bag 1 through the sterile filter 54, and the inner bag 1 is inflated.

Next, as shown in FIG.
2 folding is performed.

Next, as shown in FIG. 12, the side flaps 46, 47 and 49, 50 of the top and bottom flaps are folded in.

The contents of the carton assembled as described above are filled through the valve 5, and after filling, the nozzle 6 is capped onto the valve 5, and the carton is sealed by high-frequency induction heating.

Pasting the inner bag shown in FIG. 11 as described above,
Carton spine folding and carton spine pasting are performed by a back-in box setting machine (not shown), and blank raising, flap folding, inner bag inflation, top and bottom flap folding, and side flap folding are performed by a bag-in box setting machine (not shown) shown in FIG. Made in Ma.

In any case, in the present invention, the inner bag is attached to the carton, the inner bag is inflated, the carton is assembled, the contents can be filled through the valve, and the valve can be sealed after filling, so that the contents can be filled. It has the characteristic that it is possible to rationally manufacture the bag-in boxes.

[Brief explanation of the drawing]

Figures 1 and 2 are a cross-sectional view and a plan view of the inner bag, Figure 3,
Figure 4 is a half-cut sectional view of the valve and nozzle, Figure 5 is a half-cut sectional view of the assembled valve and nozzle, and Figure 6 is a half-cut sectional view of the valve and nozzle.
Fig. 7 is a front view of the bag making machine, Figs. 8 and 9 are plan views of the bag making machine, Fig. 10 is a plan view of bags made by the bag making machine, and Figs. It is an explanatory diagram showing a process. 1...Inner bag, 2...Bottom seal, 3...Top seal, 4...Side seal, 5...Valve,
6... Nozzle, 40... Carton blank, 53
...Valve mounting hole.

Claims (1)

[Claims] 1. A step of welding a valve flange to a predetermined position of an inner bag film during the bag making flow process to form an inner bag with a valve, and a carton blank in an expanded state that is folded and assembled. A step of aligning the valve with the valve mounting hole of the carton blank, pasting the inner bag onto the carton blank and pasting the back of the carton blank, and raising the back pasted carton and blowing sterile air or heated air into the inner bag. A process of inflating the inner bag and assembling the carton, a process of filling the contents from the valve of the assembled carton blank, and a process of capping the valve of the filled carton with a nozzle with a sealing membrane set in advance and performing high-frequency induction heating. A method for manufacturing a bag-in box filled with contents, comprising the step of sealing the bag-in box. 2. In the process of blowing sterile air or heated air into the inner bag to inflate the inner bag and assemble the carton, the flap is reversely folded and then the air blowing nozzle is inserted into the valve of the inner bag in claim 1. A method for producing a bag-in box filled with the contents described.