JPH06210773A - Single facer - Google Patents

Abstract

PURPOSE:To prevent a belt from becoming disorderly easily when used and improve reliability in terms of bonding by additionally applying a force other than the tension of the belt which is used conventionally as a pressing force required for bonding with regard to a single facer for the preparation of a corrugated cardboard for preparing a one-side corrugated sheet by bonding a core and liner together. CONSTITUTION:A core 1 is molded by a top roll 2 and a bottom roll 3, and further, is corrugated and an adhesive is applied using an adhesive application roll 4. Next, the core 1 is bonded with another core 1 at the apex of the top roll 2. This force required for the bonding is sourced from a cylinder 10 through a tube roll 8 and a pressing roll 9. In addition, the tension of the belt is no longer required by obtaining a pressing force from a magnet-embedded belt and a repulsive force of the other magnet as an alternate means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding mechanism applied to a single facer (machine for making a single-sided sheet) of a corrugator (corrugated board manufacturing machine).

[0002]

2. Description of the Related Art FIG. 7 is a block diagram of a conventional single facer.
Shown in. In this figure, a core 1 is stage-molded by an upper roll 2 and a lower roll 3. The corrugated core is glued to the top of the corrugated roll by the glue roll 4, and is bonded to the liner 6 fed along the belt 18. At this time, in order to sufficiently bond the sheets, tension is applied to the belt 18, and the belt 18 and the upper roll 2 press the step-formed core 1 and the liner 6 to make a one-step sheet 7 and send it to the next step. Was there.

[0003]

As shown in FIG. 6, the pressing pressure P and the tension T required to generate it have a relationship of P = T / r, where r is the roll radius, and the pressing pressure is In order to increase the tension, it is necessary to increase the tension T.

In FIG. 7, since the center core 1 and the liner 6 are pressed against each other, if a large amount of tension is applied to the belt 18, the belt 18 is deformed and cannot be bonded.

When the belt 18 is operated for a long time, a difference in elongation occurs in the width direction of the belt 18, and the thickness of the belt 18 becomes nonuniform, resulting in nonuniform pressing pressure. There was a case where the alignment was insufficient. Therefore, the selection of a belt material that can withstand high tension and the selection of a belt manufacturing method such as what to do with joints have been problems.

[0006]

In order to solve the above-mentioned problems, the present invention uses an external force that does not depend on the tension of the belt in a single facer in which a liner is attached to a step-molded core to produce a single-step sheet. By providing a means for pressing the core and the liner to the upper roll, a single facer that can press the core and the liner without applying excessive tension to the belt is provided.

As means not depending on the tension of the belt, a tube roll having a deformable peripheral surface for pressing the core and the liner to the upper roll via the belt or directly and a means for pressing the roll are provided. To provide a single facer capable of holding a core and a liner without applying excessive tension to the core or without a belt.

Also, a belt having a plurality of magnets embedded therein,
A single characterized in that it is provided with a plurality of magnets arranged on the opposite side of the upper roll so as to repel the magnet of the belt, and the core and liner are pressed against the upper roll by the repulsive force of the magnets. It provides a facer.

[0009]

The single facer of the present invention has a highly reliable one-stage structure in order to reduce or eliminate the tension of the belt when the center core and the liner are pressed against the upper roll by the external force and bonded by the means described above. It enables the production of sheets.

As an external force replacing the tension of the belt,
Manufacture of highly reliable single-stage sheet by pressing and bonding a core and a liner with or without a belt using a tube roll whose peripheral surface is deformable, a pressing roll that presses the roll, and a cylinder. Is possible.

Further, as an external force replacing the tension of the belt,
A belt with a plurality of magnets embedded in it, and a repulsive force of a plurality of magnets placed on the opposite side of the upper roll so that the belt is sandwiched between the core and the liner, are pressed together and bonded together. It enables the production of sheets.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the embodiment, reference numerals 1 to 4 and 6 and 7 in the figure are the same as those of the conventional one shown in FIG.

FIG. 1 is a structural diagram of a single facer according to the first embodiment of the present invention. The tube roll 8 is a balloon-like roll having a large deformability, and its internal pressure is adjusted. When the tube roll 8 is pushed by the pressing roll 9 via the belt 5, the tube roll 8 is deformed and along the belt 5, a bonding pressure is generated at the contact portion between the core 1 and the liner 6. The pressing force of the pressing roll 9 can be adjusted by the cylinder 10.

A cross section of the tube roll 8 is shown in FIG. The tube roll 8 is formed by closing both ends of a rubber tube 13 with shaft end plates and sending air by a compressor 14 to adjust the valve 1.
The internal pressure is adjusted at 5 for use. The bonding pressure is determined by the initial internal pressure of the tube roll 8 and the pressing amount of the pressing roll 9, and an appropriate operating condition is appropriately selected and used depending on the belt track, the deformability of the tube 13, etc. For securing, the bonding pressure and pressing time are important. One-sided sheet 7 as an example
In the case of the production speed of 300 m / min, stable bonding was obtained under the following conditions according to this example.

Bonding pressure: 3 kg / cm ² Bonding time: 0.05 seconds The tube roll 8 in this case has a diameter of about 300 m.
I used a rubber tube with a cloth of m.
The bonding conditions are different depending on the paper quality, the atmosphere such as the ambient temperature and humidity, the width of the single-sided sheet, etc., and are not limited to the above operating conditions.

FIG. 2 is a block diagram of the second embodiment, in which the belt 5 shown in the first embodiment is omitted. When the low-speed operation is good, the bonding time can be long and the bonding pressure can be lowered. Therefore, even with such a configuration, the same effect can be provided.

FIG. 4 is a block diagram of the third embodiment, and this case will be described. In this example, unlike the conventional belt, a plurality of magnets 16 are embedded in the belt 11 over the entire circumference as shown in FIG. Embedded magnet 16
The poles are aligned to have the same polarity inside and outside the belt 11. Further, so that the belt 11 is sandwiched, a magnet 12 is arranged on another fixing member (not shown) on the opposite side of the upper roll 2 with a slight gap 17 in the belt 11, and the magnet 12 and the upper roll 2 are separated from each other. The magnets 12 have the same polarity so that the magnets 16 repel when the belt 11 is sandwiched.

In such an embodiment, the liner 6 and the core 1 are
When the belt 11 is sandwiched between the belt 11 and the upper roll 2, the liner 6 and the core 1 are pressed against the upper roll 2 by the repulsive force of the magnets 12 and 16, and are bonded to the contact portion between the liner 6 and the core 1. Generate pressure.

Regarding the adjustment and control of the pressure, the magnet 12 may be a permanent magnet, but it is also possible to change the current by using a direct current magnet to control the strength of the magnetic field to control the bonding pressure. Further, by providing an adjusting mechanism (not shown), the position of the magnet 12 is controlled, the gap 17 is changed,
The repulsive force can also be controlled.

The specific structure of this embodiment is as follows:
6, a cobalt-based permanent magnet, and a plurality of DC electromagnets for the magnet 12 were bent and arranged, and the gap 17 was set to 3 mm. The effect was confirmed, but the adhesive, paper quality, ambient temperature and humidity, etc. were confirmed. However, the conditions are not limited to these.

Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-mentioned embodiments and structures, and may be directly connected to the liner via a belt by an external force such as a cylinder or a magnet. Within the scope of the technical idea of the present invention of pressing the core to obtain the bonding pressure, even if various design changes are made by means other than the repulsive force of the cylinder or magnet such as a rubber lining roll or vacuum suction, the present invention The same effect can be obtained.

[0022]

According to the present invention, it is not necessary to drive the belt with high tension, and the selection of the belt material is facilitated.

In the case of low speed operation, the bonding time can be lengthened and the bonding pressure can be lowered, so that a structure without a belt is also possible, and if the belt is not required, the apparatus can be greatly downsized. .

The laminating pressure can be freely adjusted according to the type of paper, the production speed, etc., and stable operation can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a single facer when a cylinder and a tube roll according to a first embodiment of the present invention are used.

FIG. 2 is a configuration diagram of a single facer when a tube roll is used and a belt is eliminated in the second embodiment of the present invention.

FIG. 3 is a configuration diagram of a tube roll used in the first and second embodiments according to the present invention.

FIG. 4 is a configuration diagram of a single facer when a magnet group according to a third embodiment of the present invention is used.

FIG. 5 is an explanatory view of the arrangement of magnets used in the third embodiment of the present invention.

FIG. 6 is a general explanatory view of generation of a bonding pressure due to belt tension.

FIG. 7 is a configuration diagram of a conventional single facer.

[Explanation of symbols]

 5 Belt 8 Tube roll 9 Pressing roll 10 Cylinder 11 Belt with magnet embedded 12 Magnet 13 Tube 14 Compressor 15 Regulator valve 16 Magnet 17 Gap

Claims (3)

[Claims] 1. A single facer for manufacturing a one-step sheet by bonding a liner to a step-molded core to provide a means for pressing the core and the liner against an upper roll by using an external force that does not depend on the tension of the belt. A single facer characterized by that. 2. A single facer for manufacturing a single-stage sheet by bonding a liner to a step-molded core and a tube whose peripheral surface is deformable, in which the core and the liner are pressed against an upper roll via a belt or directly. A single facer comprising a roll and means for pressing the roll. 3. In a single facer for manufacturing a single-step sheet by bonding a liner to a step-molded core, a belt having a plurality of magnets embedded therein and a belt sandwiched so as to repel the magnets of the belt. A single facer comprising a plurality of magnets arranged on the opposite side of the upper roll, wherein the core and the liner are pressed against the upper roll by the repulsive force of the magnets.