JPS6325940B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing double-sided corrugated cardboard, and more particularly to a method for manufacturing double-sided corrugated cardboard that is improved in flute changing of single-sided corrugated cardboard fed to a double facer.

Conventionally, during the production of double-sided corrugated cardboard, single-sided corrugated cardboard is changed by, for example, cutting the A-tier single-sided corrugated cardboard supplied from the glue machine to the double facer when it exits the glue machine, and cutting it when it passes through another glue machine. This was done by inserting the tip of the single-sided corrugated cardboard in tier B, which was on standby, into the double facer. For this reason, until this change, that is, the flute change, is completed, there is a manufacturing disadvantage in that the flow of the process after the double phaser is stopped or the flow speed is drastically reduced, and at the time of the flute change, a new There was a danger in the work when the worker manually inserted the tip of the single-sided cardboard between the heating plate at the entrance of the double facer and the cotton belt. Furthermore, stopping the flow of the above process or drastically reducing its speed may cause disadvantages such as overdrying or warping of the corrugated cardboard due to the corrugated cardboard sent to the double facer staying in the hot platen for longer than the normal residence time. also joined.

An object of the present invention is to produce double-sided corrugated cardboard in which the lamination speed of single-sided corrugated cardboard can be carried out at a high and constant speed without being stopped or reduced during the flute change of single-sided corrugated cardboard. The present invention provides a method. Another object of the present invention is to provide a method for producing double-sided corrugated cardboard that allows workers to safely flute change single-sided corrugated cardboard. Further objects of the invention will become apparent from the following description and the accompanying drawings.

In accordance with the above object, the present invention provides for cutting single-sided corrugated cardboard that is fed from a single facer to a bridge to form a pool on the conveyor on the bridge and then fed to a double facer at or before the pool. A method for producing double-sided corrugated cardboard, characterized in that the cut end is joined with the tip of another single-sided corrugated cardboard that has been fed into the bridge from another single facer and forms a pool on the conveyor on the bridge. I will provide a.

The present invention enables the flute change of single-sided corrugated cardboard during the production of double-sided corrugated cardboard to be performed on a bridge, and also allows the single-sided corrugated cardboard supplied to the double facer to be temporarily stored on the conveyor on the bridge. However, the temporary pool of single-sided corrugated cardboard is formed as follows.

If the feeding speed of the single-sided corrugated cardboard fed from the single facer is made faster than the feeding speed of the single-sided corrugated cardboard fed to the double facer on the bridge, the single-sided corrugated cardboard will be accumulated on the bridge by the speed difference. The amount of this pool should be enough to allow paper cutting and splicing for flute change without reducing the feeding speed of the single-sided corrugated cardboard sent to the double facer. The feeding speed of the single-sided corrugated cardboard sent to the bridge may be made the same as the feeding speed of the single-sided corrugated cardboard sent from the bridge to the double facer, and if more than the necessary amount accumulates, the feeding speed may be lowered from the feeding speed.

The present invention will be explained in detail below with reference to the example apparatus shown in FIGS. 1, 2, and 3.

A single-sided corrugated board a manufactured by Single Facer SA is conveyed to a long length in the lower bridge section 1001 of the bridge 100 by a vertical conveyor 1A consisting of a pair of driving endless belt conveyors 11A and 12A installed close to each other. Bridge conveyor 2A consisting of a long drive endless belt conveyor 21A
and further driven by an endless belt conveyor 3.
A pair of driven endless belt conveyors 61 are provided in close proximity to each other through a feeding conveyor 3A consisting of a 1A and a guide roll 4 consisting of an idling roll 41.
and 62 to the bridge conveyor 7 consisting of a long driving endless belt conveyor 71 located at the upper bridge section 1002 of the bridge 100, and further includes an edge aligning device 8,
The tension imparting device 101, the preheater 102 and the glue machine 103 send the glue to a double facer (not shown).

In addition, the single-sided corrugated board b manufactured by the single facer SB is transported to the lower bridge portion 1 by a vertical conveyor 1B consisting of a pair of driving endless belt conveyors 11B and 12B provided in close proximity to each other.
Long driving endless belt conveyor 21 at 001
It is sent to bridge conveyor 2B consisting of B,
Furthermore, it passes through a feed conveyor 3B consisting of driving endless belt conveyors 31B and 32B, a guide roll 4 consisting of an idling roll 41, and a bridge conveyor 7, and is sent out to a double facer along the same route as in the case of the single-sided corrugated cardboard a described above.

In the above, bridge conveyor 2A (or 2
B or 7) is vertical conveyor 1A (or 1
Vertical conveyor 1A (or 1B) is operated at a transfer speed of 1/8 to 1/12 of the transfer speed of B or 6).
is operated at a transfer speed synchronized with the speed at which single-sided corrugated cardboard a (or b) is sent out from the single facer SA (or SB), and the vertical conveyor 6
operated at a slightly faster speed. The wave-shaped accumulation a'' (or b'') of the single-sided corrugated cardboard a (or b) on the bridge conveyor 7 is caused by the vertical conveyor 6 moving the single-sided corrugated cardboard a (or b)
The amount is increased by increasing the transfer speed, the amount is decreased by making the transfer speed slower than the gripping speed, and the appropriate amount is maintained by making both the speeds the same. The wave-shaped pool a' (or b') of single-sided corrugated cardboard a (or b) on the bridge conveyor 2A (or 2B) is similar to the case of the pool a'' (or b'') described above, on the vertical conveyor 1A. (or 1B) and the single facer SA (or SB) that operates in synchronization with this, the speed at which the single-sided cardboard a (or b) is sent out is faster than, the same as, or slower than the transfer speed of the vertical conveyor 6. Depending on your needs, you can increase the amount, maintain the same amount, or decrease the amount.

One-sided corrugated cardboard a that is currently being sent from single facer SA (or SB) to double facer
(or b) to single-faced corrugated board b (or a) whose production starts with single facer SB (or SA), single facer
SB (or SA), vertical conveyor 1B (or 1
A), and the bridge conveyor 2B (or 2A) are operated to transfer the single-sided corrugated cardboard b (or a) sent from the single facer SB (or SA) to the lower bridge section by the vertical conveyor 1B (or 1A). Bridge conveyor 2B (or 2
A) Raise and feed conveyor 3B (or 3A)
to convey the tip of the single-sided cardboard b (or a) to the sending end of the conveyor 3B (or 3A),
Stop the operation of conveyor 3B (or 3A) and wait. On the other hand, the flowing single-sided cardboard a (or b)
is cut on or before vertical conveyor 1A (or 1B) to form a single facer SA (or
Stop the operation of SB) and remove one-sided cardboard a (or b).
When the cut end of the conveyor 6 and the conveyor 3A reach the top of the vertical conveyor 6 or near its entrance,
(or 3B), stop the operation of conveyor 2A (or 2B), and conveyor 1A (or 1B), and attach the tip of single-sided cardboard b (or a) and the cut end of single-sided cardboard a (or b) with adhesive tape. After joining, conveyor 3B (or 3A) and conveyor 6
Resume operation of single phaser SB (or SA)
The single-sided corrugated cardboard b (or a) manufactured in 1 is sent to a double facer.

Alternatively, the above-mentioned flowing single-sided corrugated cardboard a (or b) is cut on top of the vertical conveyor 6 or in front of it (cutter receiver 51) to stop the operation of the single facer SA (or SB). death,
After joining the cut end of single-sided corrugated cardboard a (or b) and the tip of single-sided corrugated cardboard b (or a) with adhesive tape, the operation of conveyor 3B (or 3A) and conveyor 6 is restarted, and the single facer SB
(or SA) single-sided corrugated cardboard b (or a)
can also be sent to a double phaser.

In addition, the single-sided cardboard a (or b) mentioned above is
If the cut is rough on or before the vertical conveyor 1A (or 1B),
When it is sent to the knife holder 51, it may be cut and trimmed again, and then spliced with the tip of the single-sided corrugated cardboard b (or a).

As described above, the single-sided corrugated cardboard sent to the double facer is converted from single-sided corrugated cardboard a to b (or b to a).
The flute is changed to a single-sided cardboard a.
The cutting of (or b) is performed at or before pool a″ (or b″), more preferably at or before pool a′ (or b′), and the cut end of single-sided cardboard a (or b) The splicing with the tip of the single-sided corrugated board b (or a) is done at or before the pool a'' (or b''), and before the operation of the single facer SA (or SB) is stopped, the single facer SB (or SA ) has started operation, there is no need to reduce the speed at which the single-sided corrugated board is fed to the double facer during the flute change of the single-sided corrugated board. Furthermore, when changing the flute, there is no longer a dangerous task of inserting the tip of a single-sided cardboard between the heating plate at the entrance of the double facer and the cotton belt.

FIG. 4 shows another example of an apparatus for carrying out the manufacturing method of the present invention. In this example, compared to the device example described above, feed rolls 3A' and 3B' are used instead of feed conveyors 3A and 3B, and the positions of the single phaser SB and vertical conveyor 1B are different from the bridge conveyor 2B. Since they are completely the same except for being symmetrical, detailed explanation thereof will be omitted.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are partial side views showing the main part of an example of an apparatus for carrying out the manufacturing method of the present invention divided into three parts: a front part, a middle part, and a rear part, and FIG. 1 is a schematic diagram illustrating another example of an apparatus for carrying out the inventive manufacturing method. SA, SB...Single facer, 100...Bridge, 1001...Lower bridge part, 1002...
...Upper bridge section, 2A, 2B...Bridge conveyor, 7...Bridge conveyor, a, b...Single-sided cardboard, a', b'...Puddle (first time), a'', b''...
... Tamari (second time).

Claims (1)

[Scope of Claims] 1. After being fed from the single facer to the bridge and forming a pool on the conveyor on the bridge, the single-sided corrugated cardboard being fed to the double facer is cut at or before the pool,
A method for manufacturing double-sided corrugated cardboard, characterized in that the cut end is joined with the tip of another single-sided corrugated cardboard that is fed from another single facer to the bridge and forms a pool on the conveyor on the bridge. 2. After being fed from the single facer to the bridge and forming a pool on the bridge above the conveyor, the single-sided corrugated cardboard being fed to the double facer is placed on the conveyor for the first time at the lower bridge part of the bridge. A pool is formed, and a second pool is formed on the conveyor at the upper bridge part of the bridge, and the single-sided cardboard is cut at or before the first pool, and at the cut end, The tip of the other single-sided corrugated board that has been fed into the lower bridge section from another single facer and has formed a pool on the conveyor is connected to the second
A method for producing double-sided corrugated cardboard according to claim 1, in which the paperboard is spliced at or before the sag.