JPS59124842A - Cold corrugator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a corrugated pole manufacturing apparatus for manufacturing corrugated holes using a room-temperature adhesive, and more specifically, the present invention relates to a corrugated pole manufacturing apparatus for manufacturing corrugated holes using a room-temperature adhesive. This invention relates to a corrugated board manufacturing apparatus that holds paper under pressure for a certain period of time until the adhesion is completed.

Conventionally, when manufacturing corrugated board, an inexpensive mixture of corn starch and water has been used as an adhesive to bond corrugated core paper and liner paper. It is necessary to preheat the paper by passing steam through the upper roll, lower roll, and pressure roll of the manufacturing equipment, and further heat the bonded portion to instantaneously gelatinize and solidify the cornstarch.

The amount of steam consumed for this is very large, and about 70% of the energy consumed for manufacturing the corrugated poles is consumed for heating these corrugators. In order to achieve energy savings in the corrugated hole manufacturing process, a water-based emulsion type adhesive or the like that can be bonded at room temperature can be used in place of the conventional corn starch. When bonding core paper and liner paper, this water-based emulsion type adhesive rapidly develops adhesive strength by absorbing and transferring water in the adhesive to the paper, so heating is required during bonding. I don't think so, but
This adhesive cannot be used in conventional corrugated board manufacturing equipment because it takes a short period of time for water to be absorbed into the paper and to reach a certain adhesive strength. As shown in Fig. 1, conventional corrugated board manufacturing equipment consists of a single roll (1).
and the lower roll (2).
Apply glue to the top of the step using the glue roll (4), and then apply glue to the top of the step using the glue roll (4).
2) and the pressure roll (5), the liner paper (
7) is pasted together and immediately separated from both rolls and pulled out, so it can be pulled out from the core paper (like cornstarch).
It is necessary to use an adhesive that can exert a certain adhesive force the moment the liner paper (7) and the liner paper (7) are pasted together. When using a water-based emulsion type adhesive, when it takes a short period of time to reach a certain level of adhesion between the core paper and the liner paper that will not separate, conventional corrugated cardboard 8! ! !
In the manufacturing equipment, the core paper (3) and liner paper (7) pulled out from between the lower roll (2) and the pressure roll (5) come off again due to the restoring force of the core paper that has been rolled up into stages. There is a risk.

In view of the above-mentioned drawbacks of conventional corrugated pole manufacturing equipment when using an adhesive for room-temperature bonding such as a water-based emulsion type, the present invention has been developed by: After laminating corrugated core paper and liner paper,
It is an object of the present invention to provide a cold corrugator capable of holding two sheets of paper together under pressure for a certain period of time until the adhesive strength is generated.

The cold corrugator of the present invention uses a lower roll with a dog diameter as the lower roll, and corrugated core paper is rolled up between the 11-stage opening and the groove that mesh with the lower roll, and the lower roll is rolled at a position adjacent to the upper roll. The adhesive is applied to the corrugated top of the corrugated core paper on the corrugating roll by the glue roll, which rolls into contact with the corrugating roll, and then the adhesive roll rolls into contact with the lower corrugating roll at a position adjacent to the glue roll, and the lower corrugating roll. At the rolling contact part of the rolls, the liner paper introduced along the pressure port col and the core paper on the lower roll are pasted together, and the lower roll is inserted into one stage from the rolling contact part with the pressure roll. While rotating to the vicinity of the meshing part with the roll, the laminated core paper and liner paper remain in the laminated shape and are pressed against the circumferential surface of the lower roll, and rotate together with the lower roll. This is a cold corrugator in which a suction means or a pressure means is provided inside or along the outer periphery of the lower roll, and the corrugated cardboard that has reached the vicinity of the lower roll is separated from the lower roll and pulled out.

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 is a front sectional view of the cold corcator of the present invention. (8) is a large-diameter lower roll, which has a groove on its surface parallel to the axis of the lower roll, a hollow part H+o for suction inside, and a groove on its surface. Groove (9
) at right angles to the step groove ( ) 1) to multiple annular suctions deeper than
η(11) is provided. The hollow part (1 (1)) and the suction l seedling (11) are communicated with each other through a large number of suction holes (12).
The core paper (3) fed along the two-stage roll (1) is rolled into stages at the meshing portion (13). (4) is a glue roll whose lower part is immersed in a glue tank (+=Il) and rotates while contacting the lower roll (8);
Adjust the adhesive (15) that has adhered to the surface with step 14) to a certain amount using the 1/' lid blade (l [!l), and apply it to the top of the corrugated core paper (3). .

(5) is a pressure roll, which rotates while being in pressure contact with the lower roll (8). The liner paper (7) fed along the pressure roll (5) passes between the pressure roll (5) and the lower roll (
It is pressed against the corrugated core paper (3) at the transition section (6) of step 8) and bonded. (17) is a pressure belt, which includes a pressure kite roll (18) that contacts the lower roll (8);
(19) and the guide rolls (2o) and (21), and between the pressure kite rolls (18) and (141),
Lower roll while in pressure contact with the lower roll (8)! 8) Rotate together with a. The pressure belt (+7) is made of felt.

It is preferably made of cloth, steel mesh, rubber, etc., which is flexible, has little elongation, and is strong. Further, the pressure bell 1-(17) may be a single belt extending over the entire width of the lower roll (8), or may be a plurality of belts.

Lower roll (8), second roll f1+, glue roll (4)
), pressure roll! ! 'I'H1KL: I-Kytrol (18), (1ヾ夛) is arranged around the lower roll (8) as shown in Figure 2.
), upper roll (1), glue roll (4), pressure roller (5), and pressure kite roll (18). It is desirable to increase the distance over which the cardboard is guided under pressure. As a result, the lower roll (8) having a constant diameter allows the paper to travel at a faster speed while allowing the necessary pressing time to be increased.

Next, the operation of the cold corrugator of the present invention will be explained. Core paper (3) fed along the upper roll (1)
is the meshing part between the second roll (1) and the lower roll (8) (
13), the adhesive for room temperature is applied to the top of the steps by the glue roll (4) while being suctioned from inside the lower roll (8), and the rolling contact portion of the pressure roll (5) and the lower roll (8) is applied. (
), the corrugated pole (4 is the hollow part (In) of the lower corrugated roll (8) It is sucked through the suction hole (12) and the suction groove (11) and is adsorbed to the lower roll (8), and then the Kikitoro Kaitoro (18)
and (+!l) while being pressed against the lower roll (8) by the pressure belt (17), and rotates together with the lower roll (8). Pressure Kite Roll (+! By the time it reaches 11, the moisture in the adhesive is absorbed by the core paper (3) and liner paper (7), the adhesive strength increases rapidly, and both papers are firmly bonded. Pressure At the rolling contact portion between the kite roll (1≦]) and the lower roll (8), the cardboard (22) is separated from the lower roll (8) and pulled out along the pressurized kite roll (19).

The pasted cardboard (22) is placed on the pressure guide roll (1
8), (l 9) The time for running If5 is arbitrarily selected depending on the adhesive used, and is adjusted by the diameter of the lower roll (8) and the running speed of the paper. For example, the diameter of the lower roll (8) is 1000 mm, the diameter of the upper roll (1) and pressure roll (5) is 300 mm, the center angle between the pressure kite rolls (18) and (19) is 250°, and the paper The difference in the running speed of 40 nt/min is due to the step pole (22 nt/min).
1 or the lower roll (8),
18) and (+!1) is approximately 33 seconds, which is sufficient time for bonding with an aqueous emulsion type adhesive.

When using a regular 1'lli adhesive such as a water-based emulsion as the adhesive, it is not necessary to heat each roll for adhesion, but the core paper is preheated or G1 heated while rolling. In this case, it is easier to stage the roll, so if necessary, steam may be passed through the -L two-stage roll 1) to heat it.

In the above example, the laminated corrugated poles! 22) to the outer periphery of the lower roll (8) for a certain period of time, suction means from within the lower roll and pressure means using a pressure belt (+7) rotating together with the lower roll (8) were used. The means are not limited to these means. Instead of these means, or together with these means, in conventional corrugated board manufacturing equipment, a corrugated core paper (2) is passed between the double roll (fl) and the pressure roll (5). Any known pressurizing means used for pressing this onto the lower roll (2) may be used. for example,
Use the blower to blow air from the outside of the lower roll (8).
It is also possible to use a method in which a so-called finker made of an arc-shaped metal plate is brought into sliding contact with the corrugated board (22) from the outside of the lower roll (8).

Since the cold corrugator of the present invention does not require heating each roll of the corrugated board manufacturing equipment, it is possible to save heating steam, and also eliminates the need for a complicated structure for introducing steam to each roll. In addition to simplifying the structure of each roll, the bonded core paper and inner paper can be held under pressure for the time required for bonding with a room-temperature adhesive. can be manufactured. Furthermore, since the paper is not heated during the production of corrugated board, there is no risk of the product corrugated board being warped due to expansion and contraction of the paper due to heating, which is the case in the past, resulting in defective products.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a conventional corrugated board manufacturing apparatus, and FIG. 2 is a front AII sectional view of the cold corrugation of the present invention. Explanation of symbols (1)-L corrugated roll, (2) lower corrugated roll, (3) core paper, (4) glue roll, (5) pressure roll,
(6) Rolling contact section, (7) Liner paper, (8) Large diameter lower roll, (9) Step groove, (10)
Hollow part, (11) Suction groove, (12) Suction hole, (
13) Engagement part, (14) Glue tank, (15) Adhesive, (l Ii) Doctor blade, (17
) Pressure belt, (18), (+ 9) Pressure Kiteroll 1.2 [+), (21) Kiteroll, (
22) Step hall. Agent Yoshiyuki Koyama

Claims (5)

[Claims] (1) A two-stage roll, a glue roll, and a pressure roll that mesh with or roll into contact with the lower roll of large diameter are arranged close to each other, and from the rolling contact part of the lower roll and the pressure roll. Along the rotational direction of the lower roll, the outer periphery of the lower roll up to the vicinity of the second roll is provided with suction means and/or pressure means for suctioning or pressurizing the bonded cardboard. The corrugated core paper rotates together with the lower roll at the interlocking part of the paper, a glue roll applies room temperature adhesive to the top of the corrugation, and it is pasted with the liner paper at the rolling contact between the lower roll and the pressure roll. After that, the bonded cardboard is suctioned to the lower roll 1hi by the suction means and the pressure means.
A cold corcator is characterized in that it is press-welded and rotates together with the lower roll, reaches near the upper roll, and is pulled away from the lower roll. (2) the suction means includes a hollow part within the lower roll, and an annular suction groove communicating with the hollow part is provided on the outer periphery of the lower roll;
2. A cold corcator according to claim 1, comprising a lower roll having suction from a hollow portion. (3) The cold corcator according to claim 1, wherein the pressing means comprises a force belt that rotates together with the lower roll while being in pressure contact with the outer periphery of the lower roll. (4) the cold corrugator 7 according to claim 1, wherein the pressurizing means is a blower that blows compressed air around the outer periphery of the lower roll; (5) The cold corcator according to claim 1, wherein the pressurizing means comprises an arc-shaped metal plate that slides on the outer periphery of the lower roll.