JPH069898B2 - Single Phaser - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a single facer for continuously producing single-faced corrugated board.

(Prior Art) A general structure of a single facer for continuously producing single-sided corrugated board is, as shown in FIG. 3, an upper roll 1 having an outer peripheral surface processed into a tooth shape, that is, a step, and the upper roll. A lower roll 2 provided on the outer peripheral surface with a step that meshes with the step of 1.
A pressure roll 3 that engages with the outer peripheral portion of the lower roll 2 at an appropriate nip pressure is a basic roll component, and the lower roll 2 includes, for example, as shown in FIG. And the lateral holes 10 approaching the outer periphery and extending along the axial direction of the roll are erected at equal pitches on the concentric circles with respect to the center of the roll 2.
These lateral holes 10 come into contact with the side surface of the roll 2 and through the sliding surface.
To an air suction source (not shown) by a piping system communicating with some of the above. On the other hand, on the peripheral surface of the roll 2, a plurality of circumferential slit grooves 11 having a depth reaching the respective lateral holes 10 are coaxially provided at appropriate intervals in a direction traversing the axis.

By such an air suction mechanism, the strip-shaped core paper 4 fed to the occlusal portions of the upper and lower rolls 1 and 2 is stepped and corrugated at the occlusal portions to form the corrugated core paper 6, and the corrugated core paper 6
Is closely adhered to the step surface of the lower roll and is transferred to the engaging portion between the lower roll 2 and the pressure roll 3. In this transfer section, the glue 8 is applied to the top of each step on the core paper 6 by the gluing roll 7, and the liner 5 and the liner 5 sent to the engaging portion both receive pressure and heat at the engaging portion. And bonded together to form a single-sided corrugated board 9.

Now, in the single facer having such a configuration, when the core paper 4 is stepped on the corrugated core paper 6 by the steps of both rolls at the occlusal portion of the upper and lower rolls 1 and 2 as shown in FIG. A large nip pressure of several tens of kilograms / cm acts between the occlusal steps of both rolls, and the core paper 4 is bitten and strongly pressed, and the tooth surface of the occlusal steps accompanying the rotation of both rolls is A large friction force acts due to slippage with the core paper.

In addition, the dentition immediately before biting is also rubbed by the sliding contact with the core paper 4, so that the corrugated roll corrugation is worn, and even if a standard quality core paper is used, it is 0.5 to 1.0 years. During this period, it is generally necessary to replace the corrugated rolls used for the corrugation or to re-cut the corrugations.

This wear phenomenon is largely affected by the quality of the core paper, and when a low quality core paper containing a lot of hard contaminants such as ash and ash is used, the wear of the corrugated roll becomes more remarkable, The life of the roll is further shortened, and in extreme cases, there are cases in which the roll cannot be used after being used for 2 to 3 months.

The wear phenomenon of the corrugated rolls as described above is more
Since the upper roll teeth generate more sliding friction between the core papers 4 and 6, the wear of the upper roll is more remarkable than that of the lower roll.

Therefore, these corrugated rolls are expensive, and the number of times that they can be regenerated by reshaping is limited to about three times, and after that they are forced to be disposed of, and a technology that is more effective than the industry in extending the service life of corrugated rolls. It is the current situation that the emergence of an intelligent solution is sought after.

(Problems to be solved by the invention) As described above, in the conventional single facer of this type, the upper and lower rolls are slid together with the core paper at the occlusal portion,
There is a problem that the sliding friction is severe and therefore the service life is limited due to wear, and in particular, the upper roll has more wear due to the friction than the lower roll that adsorbs the core paper, and the service life is further shortened.

The present invention was developed in view of the above problems, and is intended to provide a new technical means for carrying out step forming of a core paper without using an upper roll. is there.

(Means for Solving Problems) Therefore, according to the present invention, a toothed roll is formed on the outer peripheral surface of the core paper corrugated by a corrugated roll having an air suction mechanism inside, and a paste is applied to the stepped portion of the core paper by a gluing roll. In a single facer for forming a single-sided corrugated board by laminating a liner fed separately with a pressure roll, the number of corrugated rolls is only one, and the upstream side of the sizing roll is
A core paper introduced toward the corrugated roll is close to a portion where the core roll starts contacting with the corrugated roll, and is provided with an air pressurizing mechanism that exerts an air pressure for pressing the core paper onto the tooth profile of the corrugated roll. This is a means for solving the problem.

(Operation) With the above configuration, the core paper introduced to the peripheral surface of the lower roll enters the pressurized air atmosphere formed between the peripheral surface of the lower roll and the peripheral surface of the lower roll by the air pressurizing mechanism and enters the stage of the lower roll. It is pressed against the surface and its back side is sucked by the air suction mechanism provided on the peripheral surface of the lower roll to be adsorbed on the step surface, and by the synergistic effect of both, it is instantly plastically processed into the step shape, It becomes the core paper 6.

Thus, the core paper, which was stepped on the corrugated core paper, was transferred with rotation of the roll while being adsorbed in close contact with the lower roll step surface, and the top of the step was glued by the gluing roll. After that, the single-sided corrugated board is laminated with a liner that is separately introduced, and is pressed and heated between a lower roll and a pressure roll engaged with the liner to bond the liner.

The steps of suction transfer by the lower roll of the corrugated core paper, gluing, bonding with a liner, etc. are no different from those of the conventional single facer.

(Embodiment) Hereinafter, a single facer of the present invention will be described based on an embodiment with reference to the drawings.

FIG. 1 is a side sectional view showing an apparatus according to an embodiment of the present invention. The structure is the same as the other constituent parts except for the upper roll 1 of the conventional single facer shown in FIG. Therefore, to avoid duplication, detailed description of the same parts will be omitted.

The characteristic feature of the present embodiment is that the air pressure mechanism 12 is provided in opposition to the lower roll 2 instead of the conventional upper roll, and this will be mainly described below with reference to FIG. 2 as well. .

The structure of the air pressurizing mechanism 12 includes a nozzle body 13 for introducing high-pressure air, and a seal plate 14 extending laterally along the peripheral surface of the lower roll 2 to the side of the tip of the nozzle body 13.
And a seal material 15 mounted on the surface of the seal plate 14 that faces the peripheral surface of the lower roll 2 and having a width dimension sufficient to cover at least two steps of the roll.

The nozzle body 13 is a long and narrow quadrilateral having a slit-like cross section, the long side of which is substantially the same as the roll length of the lower roll 2 and the short side of which is approximately the step pitch of the lower roll 2 or more.

Thus, the installation direction of the nozzle body 14 is set such that the long side direction is along the stepwise direction of the lower roll 2. The sealing material 15 is preferably a coating layer made of a material having a high self-lubricating property, for example, a plate material such as fluororesin or polyethylene, or an equivalent material in consideration of sliding with the core paper.

Now, the air pressurizing mechanism 12 having the above-mentioned configuration is provided close to a portion on the upstream side of the sizing roll 7 where the core paper 4 introduced toward the lower roll 2 starts contact with the lower roll 2. , The lower roll 2 and the core paper 4 on the peripheral surface of the lower roll 2 are arranged opposite to each other with a gap corresponding to the thickness of the core paper 4 therebetween. In operation, high-pressure compressed air 16 is introduced into the nozzle body 13 of the mechanism 12.

The high-pressure air introduced into the nozzle main body 13 is almost airtight by interposing the core paper 4 between the high pressure air and the peripheral surface of the lower roll 2 facing each other by the seal plate 14 with the sealing material 15 provided at the tip of the main body. Therefore, the air leakage is relatively small, the inside of the main body is maintained in a high pressure atmosphere, and a high static pressure can be applied to the core paper surface.

Although not shown, the sealing mechanism at the short side tip of the nozzle body extends the sealing plate 14 to the end of the lower roll 2 and slides the plate edge to cover the step side surface of the lower roll 2. The seal member is abutted against the side surface of the roll and is elastically mounted. This prevents leakage in the stairs direction as much as possible.

Here, the stepping action of the core paper 4 by the air pressurizing mechanism 12 will be described. The core paper 4a that has entered between the seal material 15 of the seal plate 14 and the step top as shown in FIG. The leakage air pressure of the air 16 is received to overcome the tension acting on the core paper 4 to cause a slight slack as shown in the figure, and further progresses past the end edge of the inlet side sealing material 15 into the high pressure atmosphere in the nozzle. At the stage of entering, the core paper 4a is pressed against the step surface of the lower roll 2 all at once, and is formed into a corrugated core paper 6 having a step shape.

On the other hand, on the back surface side of the core paper 6, the air existing between the core paper and the step is quickly sucked into the lateral hole 10 through the slit groove 11 by the air suction mechanism, and is always under negative pressure. Therefore, the high-pressure atmosphere air is used as a pressure source to assist the plastic working of the core paper in which the step is a mold, and the finished core paper 6 is adsorbed in close contact with the step surface of the lower roll 2 to form a core paper. The spring back 7 of 6 and the lower roll 2 are transferred to the next step without changing their shapes against the centrifugal force.

If the high-pressure air supplied to the air pressurizing mechanism 12 is preferably high-temperature air of about 200 ° C., it can be used together for heating the core paper, and plastic working of the core paper and bonding with the liner can be performed. Is effective for.

The present invention is not limited to the above embodiments, and it goes without saying that various design changes can be made without departing from the gist of the present invention.

(Effects of the Invention) According to the configuration of the present invention as described in detail above, since an expensive upper roll is not used, the structure of the apparatus is simplified, and the wear amount of the lower roll itself is reduced, and the service life thereof is reduced. The extension of is secured. Further, in the case of the present invention, unlike the stepping process of the core paper by the engagement between the upper roll and the lower roll, the core paper is plastically processed by air pressure using the lower roll stage as a mold. The step shape is not necessarily subject to various restrictions as an occlusal tooth and has many advantages such as a high degree of freedom in selecting the step shape.

[Brief description of drawings]

FIG. 1 is a side sectional view of a single facer showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part of the same embodiment, and FIG. 3 is a side sectional view of a conventional single facer. FIG. 1 is an enlarged cross-sectional view of an occlusal portion of upper and lower rolls in the conventional device. Explanation of the main parts of the figure 2 …… Lower roll 4 …… Core paper 6 …… Corrugated core paper 9 …… Single-sided corrugated board 10 …… Horizontal hole 11 …… Slit groove 12 …… Air pressure mechanism 13 …… Nozzle body 14… … Seal plate 15 …… Seal material 16 …… High pressure air

Claims (1)

[Claims] 1. A glue is applied to a step portion of a core paper corrugated by a step roll having an air suction mechanism on the outer peripheral surface by a glue roll, and a liner fed separately is used as a pressure roll. In a single facer that is bonded to form a single-faced corrugated board, the number of the corrugated rolls is only one, and the core paper that is introduced toward the corrugated rolls on the upstream side of the sizing roll is the same roll A single facer, which is provided with an air pressurizing mechanism that exerts an air pressure that presses the concentric paper against the tooth profile of the corrugated roll, in the vicinity of the portion where the contact starts with.