JPS6229221B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a corrugator machine for manufacturing double-sided corrugated cardboard or multi-sided corrugated cardboard.

As is well known, the above-mentioned corrugator machine feeds liner paper and corrugated paper into a single facer, winds up the corrugated paper into tiers and glues them to the top of the tier, and then laminates the liner paper to form a single-sided corrugated board.
This single-sided corrugated cardboard and front liner are fed into a double facer and bonded together.

Two single facers are usually provided below the bridge, and when only one of the single facers is driven, a double-sided corrugated board is produced, and when two double facers are driven simultaneously, a double-sided corrugated board is produced.

The double-sided corrugated cardboard or double-sided corrugated cardboard discharged from the double facer is then cut in the length direction by a slitter, and further cut in the width direction by a rotary cutter to form a corrugated board sheet of a desired size.

In recent years, improvements in rotary cutter control devices have made it possible to accurately cut objects at desired locations with rotary cutters, so pre-printing is now applied to the production of corrugated cardboard using corrugator machines. You can now use the front liner.

Producing plain cardboard using a corrugator machine,
In the case of corrugated cardboard that is then printed, it is impossible to print accurately and beautifully, and it is also impossible to maintain the strength of corrugated cardboard, but corrugated cardboard that uses a pre-printed front liner is It eliminates the shortcomings.

However, due to printing considerations, the minimum amount of front liner that is printed in advance is one roll (one roll), which is equivalent to a length of several thousand meters. Therefore, it is not suitable for manufacturing corrugated cardboard that requires small-scale production.

Furthermore, since the front liner is in the form of a continuous web, printing on the front liner, whether by flexographic printing, gravure printing, or offset printing, is done by rotary printing, which requires a large amount of equipment and space.

Therefore, in order to solve these problems, we used a front liner that was pre-cut to a desired size and printed on it, and a single-sided corrugated cardboard that was previously manufactured using a corrugator machine. BACKGROUND ART There has been a sheet laminating machine that manufactures corrugated cardboard by laminating single-sided corrugated cardboard.

However, in this conventional sheet lamination type, both the front liner and the single-sided corrugated board are sheet-shaped, and two separate machines, a corrugator machine and a sheet lamination machine, are required. It has some drawbacks.

Since both are single-leafed, the production rate is low.

Since it is necessary to assign a worker to each of the two devices, the number of workers is wasted.

There is waste in transporting single-sided corrugated cardboard from a corrugator machine to a laminating machine.

Since a lot of time passes from the time the single-sided corrugated board is manufactured until the front liner is attached, the single-sided corrugated cardboard will warp significantly due to changes over time, which can cause machine trouble when attaching the front liner, and also lead to defective corrugated cardboard. Causes the production of

Since two devices are required, it takes up a lot of space and is expensive.

Production management is difficult.

This invention eliminates these drawbacks while providing the clear printing and high strength of corrugated board, which are the characteristics of preprint printing, and also makes it possible to manufacture corrugated board with a continuous web-like front liner. The purpose is to provide a corrugator machine with

In order to achieve this object, the present invention disposes a glue machine for gluing the corrugated corrugated corrugated paper of the single-sided corrugated board on the path of movement of the single-sided corrugated board from the bridge to the double facer, and The structure includes a paper feeding device that continuously conveys the sheets to be pasted one by one toward the double facer.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in Figures 1 and 2, the bridge 1
A single facer 2 is provided below the single facer 2, and a mill roll stand 3 is provided in front of the single facer 2 to support a roll-shaped back liner paper _S1 . In addition, two mill roll stands 4 and 5 are installed behind the single facer 2, one mill roll stand 4 holds a roll of paperboard S ₂ , and the other mill roll stand 5 holds a roll of front paper. Supported liner paper S ₃ .

The medium paper S ₂ pulled out from the mill roll stand 4 is wrapped around the heater drum 7 of the preheater device 6 to adjust its temperature appropriately, and is then fed into the single facer 2 to be rolled into stages. Glue is applied to the top.

On the other hand, the back liner paper S ₁ pulled out from the mill roll stand 3 is similarly wound around the heater drum 9 of the preheater device 8 to have its temperature controlled, and then sent to the single facer 2 to be heated to the liner paper S 1 .
S ₂ is laminated to produce single-sided corrugated cardboard S ₄ .

This single-sided corrugated cardboard S ₄ is transported by vertical conveyor 1
0 onto a belt conveyor 11 supported on the bridge 1. Belt conveyor 11
is slower than the vertical conveyor 10, and therefore, the required length of single-sided corrugated cardboard _S4 accumulates on the belt conveyor 11, and the single-sided corrugated cardboard _S4 sent out from the belt conveyor 11 is moved forward of the bridge 1. The material is passed through a plurality of guide rollers provided in the front and is fed into the double facer 20.

The number of the guide rollers is arbitrary, and in the illustrated embodiment, the first guide roller 30, the second guide roller 3
1. Third guide roller 32 and fourth guide roller 3
Using the four guide rollers No. 3, between the third guide roller 32 and the fourth guide roller 33, one-sided corrugated cardboard is placed with the rolled up medium paper S ₂ facing downward.
S ₄ is guided, and a glue machine 40 is provided in the guide portion.

The glue machine 40 has a lower part of the outer periphery of a glue roll 42 immersed in the glue layer of a glue pan 41, and a rider roll 43 is arranged on the glue roll 42.
By passing the single-sided corrugated cardboard S ₄ between the paperboard S 3 and the paperboard S 3 , glue can be applied to the top of the corrugated paperboard S ₂ .

A paper feeding device 50 is provided between the bridge 1 and the double facer 20 for continuously feeding sheets _S5 one by one toward the double facer 20. This paper feeding device 50 places a large number of stacked sheets S ₅ on a table 51 that can be raised and lowered,
The sheets _S5 are continuously taken out one by one from the upper part and conveyed to the double phaser 2 by a belt conveyor 52.
It is configured to send it to 0. Note that this paper feeding device is of a conventional type.

Here, the double facer 20 has a pair of belt conveyors 21 and 2 similar to the conventional double facer.
1 are placed one above the other and the cotton belts 22 are brought into contact with each other,
A large number of pairs of rollers 23 are provided in the moving direction of the cotton belt 22 to sandwich the abutting cotton belts 22 from above and below. Note that the single-sided corrugated cardboard S ₄ and the sheet S ₅ are conveyed while being sandwiched between the cotton belts 22.

In addition, all types of adhesives such as vinyl acetate adhesives and starch adhesives are used for the glue applied to the top of the corrugated paperboard _S2 , and when using starch adhesives, heating is required. Therefore, the above double facer 2
It is convenient to provide a hot plate at 0.

In front of the double facer 20, there is a double-sided corrugated cardboard S ₆ sent out from the double facer 20.
A slitter 60 for cutting the double-sided cardboard S6 in the length direction is provided, a rotary cutter 61 for cutting the double-sided corrugated cardboard _S6 in the width direction is arranged in front of the slitter 60, and a delivery device 62 is further provided in front of the rotary cutter 61 for cutting the double-sided cardboard S6 in the width direction.

Now, when the sheet feeding device 50 is driven to continuously feed the laminated sheets S ₅ placed on the table one sheet at a time from above, the sheets S ₅ are transferred to the belt conveyor 5.
2 to the double facer 20, and is pasted onto the single-sided corrugated cardboard _S4 that has been fed into the double facer 20 from another conveyance path.

By the way, it is preferable to feed the sheets S ₅ so that the leading edge of the sheet S 5 fed later collides with the trailing edge of the sheet S ₅ fed earlier. If this is difficult, the sheets are fed so that there is a slight gap between adjacent sheets _S5 , or so that the front and rear of the adjacent sheets _S5 overlap each other.

The above-mentioned double-sided corrugated cardboard S ₆ manufactured by the double facer 20 is then cut in the length direction by a slitter 60 and further cut in the width direction by a rotary cutter 61 to produce a rectangular double-sided corrugated cardboard S ₇ . . Then, this double-sided corrugated cardboard S ₇ is carried forward by the delivery device 62.

Note that cutting in the width direction is accurately performed at a desired position by a rotary cutter 60 based on an existing control device.

This double-sided corrugated board _S7 is punched into a desired shape using a punching device or the like, but a punching allowance is usually provided at the edges in consideration of margin during punching.

In the embodiment shown in FIGS. 1 and 2, the paper feeder 50 for sheet S ₅ is arranged between the bridge 1 and the double facer 20, but the arrangement is not limited to this, and the arrangement is not limited to this. In order to measure the
The paper feeding device 50 may be provided on the double facer 20 as shown in FIG. In that case, the sheet _S5 sent out from the top of the table 51 is conveyed to the double phaser 20 by a first belt conveyor 53 and a pair of second belt conveyors 54 arranged above and below.

Note that if the front liner paper S ₃ is pulled out from the _mill roll stand 5 shown at the left end of FIG. Manufacturing of double-sided corrugated board using ₅ and above surface liner paper S ₃
It is also possible to manufacture the double-sided corrugated board by arbitrarily switching between the two methods.

As described above, in this invention, sheets of paper that are continuously supplied one by one and single-sided corrugated cardboard produced by a single facer are fed into a double facer to form a double-sided corrugated board. It provides the clear and beautiful printing that is characteristic of preprint printing, which prints on paper in advance, and the high strength of corrugated board, while also eliminating the drawbacks of conventional sheet-fed laminating machines.

[Brief explanation of the drawing]

FIG. 1 is a schematic view showing one embodiment of a corrugator machine according to the present invention, FIG. 2 is an enlarged view of the main parts of the same, and FIG. 3 is an enlarged view showing another embodiment of the same. 1... Bridge, S ₄ ... Single-sided cardboard, 20...
…double facer, 40…glue machine, S ₅ …
...Sheet paper, 50...Paper feeding device.

Claims (1)

[Claims] 1. In a corrugator machine that transports single-sided corrugated cardboard manufactured by a single facer from the top of the bridge toward the double facer in front of the bridge, the corrugated core of the single-sided corrugated board is placed on the path of movement of the single-sided cardboard from the bridge to the double facer. A corrugator machine, characterized in that a glue machine for applying glue to the top of the corrugated paper is disposed, and a paper feeding device is provided for continuously conveying sheets of paper to be pasted to the corrugated paper one by one toward the double facer. .