JP2537514Y2 - Corrugated box making machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box making machine equipped with a flexographic printing machine.

[0002]

2. Description of the Related Art A general cardboard box making machine equipped with a flexographic printing machine is shown in FIG. 4 in which a cardboard sheet 1 stacked on a table 14 is fed to the lowermost layer through a kicker or a lead edge type feeder. FIG. 1 shows a sheet feeding unit 2 for sequentially carrying out one sheet at a time from a sheet 1a, a printing unit 3 for performing predetermined printing on a corrugated cardboard sheet 1 conveyed from the sheet feeding unit 2, and a corrugated cardboard sheet 1 conveyed from the printing unit 3. As shown in FIG. 3, a paper discharge unit 11 for forming a ruled line K and further processing a slotter groove S, a die cutter unit 12 for processing hand holes and air holes in the corrugated cardboard sheet 1 conveyed from the paper discharge unit 11, and the die cutter The box making machine main body 25 is formed by a folde ink unit 13 for performing various bending and sticking operations on the corrugated cardboard sheet 1 conveyed from the unit 12 and a counter ejector unit not shown.
Is composed.

In the printing section 3, an ink reservoir 17 is provided.
The plate cylinder 18 to which the ink in the ink reservoir 17 is sequentially transferred and supplied.
And a printing plate 19 wound around the plate cylinder 18 and an impression cylinder 20 pressed against the printing plate 19 via the corrugated cardboard sheet 1. The printing unit 3 is provided with a plurality of printing plates 3 for printing in a plurality of colors. As shown in FIG. 3, two sets are installed such that two-color printing of No. 1 and No. 2 is performed, and the paper discharge section 11 holds and rotates the corrugated cardboard sheet 1 running in the center. As shown in FIG. 3, a pair of upper and lower creaser rolls 15a and 15b forming a predetermined ruled line K and the corrugated cardboard sheet 1 running in the center are sandwiched and rotated to thereby obtain a predetermined slotter groove S as shown in FIG. , And a pair of upper and lower slotter rolls 16 which form a punch. The die cutter section 12 further has a punching die 24 fixed to a die cylinder 23 and an anvil cylinder 22.

[0004] The corrugated cardboard sheet 1, which is subjected to various processes in the above-mentioned parts, is conveyed via conveying rolls 10a to 10h, conveying belts 21a and 21b and various sheet guides (not shown) provided between the parts. I have.

[0005]

The conventional cardboard sheet box making machine has the structure and function as described above. If the surface of the corrugated cardboard sheet to be supplied is dry, it takes time to dry the ink, and the operation speed is reduced. When the (sheet running speed) is high, the drying of the ink cannot catch up, and the ink is transferred to the anvil cylinder or the transport belt, and the subsequent sheet is stained with ink.

Further, when a sheet that has been dried too much is passed, the sheet may be cracked (creased) in the liner, which is a sheet material of the sheet, due to scoring or folding in a downstream process.
The present invention has been developed to address such a problem, and the corrugated cardboard sheet contains moderate moisture (humidification).
The purpose is to let them.

[0007]

The construction of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. Paper feed unit 2 to be fed, and printing unit 3 connected to the paper feed unit 2
And a paper discharging unit 11 connected to the printing unit 3, a measuring instrument 5 for detecting the water content of the corrugated cardboard sheet 1 fed to the box making machine main body 25, and a measuring instrument 5. A humidifying unit 4 for feeding back the measured value and controlling a predetermined amount of moisture for the fed corrugated cardboard sheet is provided.

[0008]

According to the present invention, a suitable amount of water can be hydrated (humidified) at a predetermined position on a sheet to be fed by the above means, and the ink is absorbed by the sheet on the paper material side during printing. Be faster. In addition, since the temperature of the paper material surface is increased by humidification with steam, the drying performance (speed) of the ink is improved, and furthermore, the humidification of the creased line portion causes the crease and the bending process. Cracks in paper can be eliminated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 25 denotes a box making machine main body, and the box making machine main body 25 includes a paper feeding section 2, a printing section 3, and a paper discharging section 11. The paper feed unit 2, print unit 3, and paper discharge unit 11 are the same as the conventional paper feed unit 2, print unit 3, and paper discharge unit 11 shown in FIG.

In the present invention, a humidifying unit 4 is provided between the paper feeding unit 2 and the printing unit 3 and a measuring device 5 is provided in front of the paper feeding unit 2 and is provided with the humidifying unit. 4 is a measuring device 5 for detecting the water content of the corrugated cardboard sheet 1 before feeding it to the paper feeding section 2.
A steam generator 7 connected to the steam generator 7 via a controller 6 and a steam supply unit 8 connected to the steam generator 7 via a steam pipe 9, and the steam supply unit 8 is printed as shown in FIG. A plurality of movable portions 8 that can be set to move in the width direction of the corrugated cardboard sheet 1 in conjunction with the fixed portion 8a that humidifies the entire surface and the ruled line K position.
b, and these are the corrugated cardboard sheets 1 traveling together.
, Or vertically only or only the upper side. Note that the type of the humidifying unit 4 is not limited to the illustrated one, and various types of lengths and shapes can be considered.

Thus, the corrugated cardboard sheet 1 is humidified and heated with steam, conveyed to a downstream printing section, subjected to predetermined printing by a known method, and after printing, the water-based ink absorbability to the paper material is increased. Hasten the drying of the ink,
Also, by humidifying the ruled line portion, cracks (sheet cracks) at the time of crease and bending, which have conventionally occurred, are eliminated.

[0012]

As described above, according to the present invention, a measuring machine for detecting the water content of a corrugated cardboard sheet to be fed is provided on the body of the box making machine having a paper feeding unit, a printing unit, and a paper discharging unit, and the measuring device. The measurement value of the container is fed back, and a humidifying unit that controls a predetermined amount of water is provided for the fed corrugated cardboard sheet.Therefore, the printing surface of the paper material is humidified and the water-based ink is absorbed into the paper material. By increasing the speed and speeding up the drying of the ink and humidifying it with high-temperature steam, the surface temperature of the paper increases, and the drying of the ink is accelerated. The creased portion is also humidified, so that cracking of the paper material is eliminated in the crease and folding process, and the surface of the paper material and the creased portion are humidified, so that the strength of the paper material is not reduced. .

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a part of one embodiment of the present invention.

FIG. 3 is an explanatory diagram of a processing state of a corrugated cardboard sheet.

FIG. 4 is a side view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated cardboard 2 Paper supply part 3 Printing part 4 Humidification part 5 Measuring instrument 11 Paper discharge part 25 Box making machine main body

Claims (1)

(57) [Scope of request for utility model registration] 1. A cardboard box having a paper feed unit for feeding cardboard sheets one by one to a box making machine body, a print unit connected to the paper feed unit, and a paper discharge unit connected to the print unit. A measuring device for detecting the water content of the corrugated cardboard sheet fed to the main body of the box making machine, a humidifier for feeding back the measured value of the measuring device and controlling a predetermined amount of moisture for the fed corrugated cardboard sheet; A cardboard box making machine characterized by the addition of