JPH0952297A - Device for manufacturing single-faced corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly stick the crest part of a corrugated intermediate core paper to a liner by adequately applying a paste to the entire crest part. SOLUTION: A first stage roll 16 with a corrugated part of the outer peripheral face and a second stage roll with a corrugation part likewise on the same face are pivotally supported in such a manner that these rolls are freely rotated. Each corrugation crest and trough part is engaged with the other through an intermediate core paper 14. The intermediate core paper 14 is corrugated as specified by passing it the paper 14 through an area where the first stage roll 16 is engaged with the second stage roll 10. After that, paste is applied to the crest part of the corrugation by a pasting mechanism 22. On the peripheral face of the second stage roll 10, peripheral groves 12 for holding the intermediate core paper 14, by suction, on the outer peripheral face of the second stage roll 10 in cooperation with a suction chamber 28, are formed at a specified interval, in the axial direction. On the peripheral face of the first stage roll 16, a peripheral groove 30 is formed each at a position corresponding to each peripheral groove 12 formed on the peripheral face of the second stage roll 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-sided corrugated board manufacturing apparatus for manufacturing a single-sided corrugated board in which a core paper and a liner are bonded together.

[0002]

2. Description of the Related Art A single-faced corrugated cardboard manufacturing apparatus (a so-called single facer) is provided with a frame in which a first-stage roll and a second-stage roll, each having a corrugated step formed on a circumferential surface, mesh with each other at the step. The press roll is pressed against the second-stage roll via a core paper which is a raw material paper for single-sided cardboard and a liner. That is, the core paper is supplied between the first-stage roll and the second-stage roll, and a required step (flute) is formed when passing between the two rolls. A starch-based paste is applied to the step top of the obtained waveform by a sizing roll provided in a sizing mechanism. The liner supplied from the opposite side of the core paper via a press roll is pressed between the press roll and the second roll at the top of the core paper,
A single-sided cardboard is manufactured by laminating the core paper and the liner.

[0003]

As shown in FIG. 4, a plurality of peripheral grooves 12 are formed at predetermined intervals in the axial direction on the peripheral surface of the second stage roll 10 used in the above-mentioned single-sided corrugated board manufacturing apparatus. There is. The circumferential groove 12 is formed by a stepped core paper 1.
4 is held on the outer peripheral surface of the second-stage roll 10 in close contact,
It is provided in order to stably feed the core paper 14 toward the gluing mechanism and to perform good gluing on the corrugated step top. That is, for example, a suction chamber (not shown) is arranged along the outer periphery of the second-stage roll 10 on the opposite side to the feeding path of the core paper 14, and the suction chamber is provided in each of the circumferential grooves 12 through the chamber. By forming a negative pressure, the corrugated core paper 14 is fed while being suction-held on the peripheral surface of the second-stage roll 10.

When the core paper 14 is nipped by the first-stage roll 16 and the second-stage roll 10 at a required nip pressure to form a stage, the core paper 14 is mainly stretched in the width direction. In this case, since only the corrugated step portion is formed on the peripheral surface of the first-stage roll 16, the extended portion of the core paper 14 is the circumferential groove of the second-stage roll 10 to which no pressure is applied. The phenomenon of escaping into the inside 12 is generated to form the recess 14a. Moreover, since the pressure inside the peripheral groove 12 is negative, the portion of the core paper 14 corresponding to each peripheral groove 12 is fed in a concave shape toward the peripheral groove side as shown in FIG. It Therefore, the core paper 14
No glue is applied to the positions corresponding to the respective circumferential grooves 12 in the core paper 14 as shown in FIG.
A line-shaped non-paste white line (so-called dry streak) 17 is attached at a position corresponding to the circumferential groove 12 in the feeding direction. Therefore, there is a problem that the core paper 14 and the liner are not adhered to each other at the location of the dry streak 17 and the strength of the single-faced corrugated board is deteriorated and defective products are generated.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the problems inherent in the above-mentioned prior art, and has been proposed in order to solve the problems, and the whole step top portion of a corrugated core paper is formed. An object of the present invention is to provide a single-sided corrugated board manufacturing apparatus capable of reliably applying a sizing agent to a liner and reliably adhering it to a liner.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and preferably achieve the intended purpose, the present invention provides a first stage roll having a corrugated step portion on its outer peripheral surface, and this corrugated step portion. A second step roll having a corrugated step portion formed on the outer peripheral surface that meshes with the first step roll to form a desired step on the core paper that is passed between the first step roll and the peripheral surface of the second step roll. A plurality of circumferential grooves formed at predetermined intervals in the axial direction and functioning to hold the core paper on the outer peripheral surface of the second-stage roll in cooperation with the holding means, and the second-stage formed by the second stage. A gluing mechanism for gluing the step top portion of the core paper fed along the outer peripheral surface of the roll, and a feed path of the liner that is attached to the core paper on the outer peripheral surface of the second step roll The liner is pressed against the core paper that is disposed alongside the outer peripheral surface of the second-stage roll and is bonded to the core paper. In single facer provided with a wearing section, characterized in that said a circumferential groove on the peripheral surface corresponding to each circumferential groove of the second fluted roll in the first stage rollers and respectively formed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a single-sided corrugated cardboard manufacturing apparatus according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. The same members as those described with reference to FIG. 4 are designated by the same reference numerals.

FIG. 1 schematically shows an apparatus for producing single-faced corrugated board according to the embodiment. The first-stage roll 16 has a corrugated step portion on the outer peripheral surface, and the first corrugated step portion 16 has a corrugated step portion on the outer peripheral surface. A two-stage roll 10 and a frame (not shown) are rotatably supported. The rotation axis of the first-stage roll 16 is the second
The corrugated step portions are located diagonally above the rotation axis of the corrugated roll 10, and can be meshed with each other via the core paper 14.
A gluing mechanism 22 including a gluing roll 18 and a doctor roll 20 is arranged immediately below the first-stage roll 16 and obliquely below the second-stage roll 10. The core paper 14 is firstly fed from the base paper supply source (not shown) on the left side in FIG.
It is supplied to the meshing region between the corrugating roll 16 and the second corrugating roll 10, and the required corrugation is formed by passing through this region. The corrugated core paper 14 in which the step is formed is pasted to the top of the step by the pasting mechanism 22, and then the feeding direction is reversed along the outer peripheral surface of the second step roll 10 to move upward. Further, the liner 24 is supplied to the second-stage roll 10 from a raw paper supply source (not shown) on the right side in FIG. 1, and is fed upward while being joined to the top of the core paper 14 to which the glue is applied. It

On the side opposite to the first-stage roll 16 with the second-stage roll 10 sandwiched therebetween, a press roll 26 as a pressure-bonding means which cooperates with the second-stage roll 10 to bond the core paper 14 and the liner 24 together. Is provided. That is, the press roll 26 is rotatably arranged at a position on the outer peripheral surface of the second stage roll 10 and close to the feeding path of the liner 24, and is fed along the outer peripheral face of the second stage roll 10. The core paper 14 and the liner 24 attached to the core paper 14 are
It is adapted to be pressed against the corrugated roll 10. In addition,
As the pressure-bonding means that cooperates with the second-stage roll 10, a form in which a plurality of press rolls are arranged at predetermined intervals in the circumferential direction of the second-stage roll 10 or a form using a freely movable endless belt can be appropriately adopted. Is.

As shown in FIG. 2, a plurality of circumferential grooves 12 are formed on the circumferential surface of the second stage roll 10 in the axial direction at predetermined intervals. Further, as shown in FIG. 1, a suction chamber 28 serving as a holding means that opens to the second-stage roll 10 side is disposed on the opposite side of the gluing mechanism 22 with the second-stage roll 10 interposed therebetween. By operating a vacuum suction source (not shown) connected to the suction chamber 2
8 and a negative pressure is formed in each of the circumferential grooves 12. Therefore, the core paper 14 which is step-formed by the first-stage roll 16 and the second-stage roll 10 is sucked and held on the outer peripheral surface of the second-stage roll 10, and the gluing mechanism 2
Stable delivery to No. 2.

On the peripheral surface of the first-stage roll 16, as shown in FIG. 2, the peripheral grooves 1 formed on the peripheral surface of the second-stage roll 10 are arranged.
The peripheral grooves 30 are formed at the positions corresponding to 2, respectively. In the circumferential groove 30, when the core paper 14 is pinched by the first-stage roll 16 and the second-stage roll 10 at a required nip pressure, the extended portion of the core paper 14 is the second-stage roll 10. Circumferential groove 12
It works to prevent you from escaping to the side only. That is, since pressure is not applied to the core paper 14 from both sides of the rolls 16 and 10 at the portions where the circumferential grooves 30 and 12 of the rolls 16 and 10 face each other, the extended portion of the core paper 14 is located in the grooves 3 and 3.
Therefore, it is possible to prevent the large concave portion 14a from being generated by escaping only to the peripheral groove 12 side of the second stage roll 10 as in the conventional case (see FIG. 3).

[0012]

Next, the operation of the single-faced corrugated board manufacturing apparatus according to the above-described embodiment will be described. When the first and second stage rolls 16 and 10 are rotationally driven, the core paper 14 supplied from the raw paper supply source to the meshing region of the first stage roll 16 and the second stage roll 10 passes through the region. As a result, the required steps are formed. At this time, the first stage roll 16
The core paper 14 pinched with the required nip pressure by the second-stage roll 10 mainly extends in the width direction, and the extended portion escapes to a place where no pressure is applied.
In this case, each circumferential groove 12 that functions to attract and hold the core paper 14 formed on the circumferential surface of the second roll 10
As shown in FIGS. 2 and 3, circumferential grooves 30 are formed on the circumferential surface of the first-stage roll 16 corresponding to the above, so that the extending portion of the core paper 14 is located in both circumferential grooves 30, 12. It will be scattered and run away. That is, as compared with the conventional case in which the extended portion of the core paper 14 escapes only on the circumferential groove 12 side of the second-stage roll 10 as compared to the concave portion 14a, the concave shape is formed on the circumferential groove 30 or the circumferential groove 12 side. The amount is very small.

The core paper 1 in which the step is formed as described above.
4 is stably fed toward the gluing mechanism 22 in a state of being sucked and held on the outer peripheral surface of the roll 10 by the negative pressure formed in each circumferential groove 12 of the second stage roll 10. . Then, after the gluing mechanism 22 has glued the top of the core paper 14, the feeding direction is reversed along the outer peripheral surface of the second roll 10 and goes upward (see FIG. 1). At this time,
Since the concave portions 14a are hardly formed at the positions corresponding to the circumferential grooves 12 of the second-stage roll 10 in the core paper 14, the paste is surely applied to the entire top of the stage. Further, the liner 24 supplied from the base paper supply source is the second roll 1
0 and the press roll 26 are supplied to the bonding area. The liner 24 is clamped between the press roll 26 and the second roll 10 at the top of the core paper 14, and
24 adhesives are made.

As described above, in the embodiment, the first stage roll 16
By forming the circumferential groove 30 on the circumferential surface corresponding to the circumferential groove 12 of the second-stage roll 10 in the above, when the step of the core paper 14 is formed by the first-stage roll 16 and the second-stage roll 10, It is possible to prevent the paper 14 from becoming concave toward the circumferential groove 12 side of the second roll 10. Therefore, the gluing mechanism 22 can apply the gluing material to the entire step top portion of the core paper 14.
(The dry streak 17 is not generated), and the core paper 14 and the liner 24 can be reliably adhered to each other to prevent the strength of the single-sided corrugated board from being lowered.

[0015]

[Modification] As a means for holding the core paper on the outer peripheral surface of the second-stage roll, it is not the method of providing the suction chamber outside the second-stage roll as described above.
By forming a central through hole inside the corrugated roll and forming a hole communicating with the central through hole in each circumferential groove, and operating a vacuum suction source connected to the central through hole, the central through hole and the hole are inserted. Alternatively, a negative pressure may be formed in the circumferential groove. In addition, a pressure chamber that surrounds the gluing mechanism and is open to the first and second rolls is provided, and compressed air is supplied to the pressure chambers so that the core paper is sandwiched between the pressure chambers. It is also possible to employ a method in which the core paper is pressed against the outer peripheral surface of the second roll by the difference in atmospheric pressure between the side and the circumferential groove side. The roll arrangement of the first-stage roll and the second-stage roll is the same as that of the first embodiment.
Instead of arranging the second-stage roll diagonally below the corrugating roll, the second-stage roll may be arranged above the first-stage roll.

[0016]

As described above, according to the single-sided corrugated board manufacturing apparatus according to the present invention, the peripheral groove of the first-stage roll is formed at a position corresponding to each peripheral groove formed on the second-stage roll. By forming the core paper, it is possible to prevent the core paper from becoming concave toward the circumferential groove side of the second roll when forming the corrugated paper with both rolls. As a result, the paste can be applied to the entire corrugated top of the corrugated core paper, and the entire corrugated top of the corrugated core and the liner can be reliably bonded to reduce the strength of the single-sided corrugated board. Can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a single-sided corrugated board manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of a main portion showing a double roll of a manufacturing apparatus according to an embodiment.

FIG. 3 is an explanatory view showing an enlarged main part of the double roll of the manufacturing apparatus according to the embodiment.

FIG. 4 is a front view of a main part of a double-sided roll in a conventional single-sided corrugated board manufacturing apparatus.

FIG. 5 is an explanatory view showing an enlarged main part of a double roll of a manufacturing apparatus according to a conventional technique.

FIG. 6 is an explanatory plan view of a core paper having a dry streak.

[Explanation of symbols]

 10 Second Stage Roll 12 Circumferential Groove 14 Core Paper 16 First Stage Roll 22 Gluing Mechanism 24 Liner 26 Press Roll (Crimping Means) 28 Suction Chamber (Holding Means) 30 Circumferential Grooves

Claims (1)

[Claims] 1. A first-stage roll (16) having a corrugated step portion formed on an outer peripheral surface thereof, and a corrugated step portion meshing with the corrugated step portion formed on the outer peripheral surface of the first step roll (16). A second-stage roll (10) for forming a required step on the core paper (14) that is passed between
The core paper (14) is formed on the outer peripheral surface of the second-stage roll (10) in cooperation with the holding means (28) on the peripheral surface of the second-stage roll (10) at predetermined intervals. A plurality of peripheral grooves (12) functioning to hold the above and a stepped portion of the core paper (14) which is stepwise formed and is fed along the outer peripheral surface of the second step roll (10) are glued. It is disposed on the outer peripheral surface of the second-stage roll (10) and the adhering path of the liner (24) to be bonded to the core paper (14). A single-faced corrugated board manufacturing apparatus comprising a core paper (14) fed along the outer peripheral surface of a second stage roll (10) and a pressure bonding means (26) for bonding a liner (24) by pressing. A single-sided corrugated board manufacturing apparatus characterized in that peripheral grooves (30) are formed on the peripheral surfaces of the first-stage roll (16) corresponding to the peripheral grooves (12) of the second-stage roll (10).