JPS5814305B2 - Single facer for manufacturing single-sided corrugated board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single facer for manufacturing single-sided corrugated board, and more specifically, the present invention relates to a single facer for producing single-sided corrugated board, and more specifically, the present invention relates to a single facer for manufacturing single-sided corrugated board. The corrugated and wrinkled corrugated paper is transferred along the sintering roll, and during the transfer, glue is applied to the wrinkled top of the corrugated paper, and the liner paper is laminated to the glued corrugated paper by a pressure roll. This invention relates to a single facer for manufacturing single-sided corrugated board.

When manufacturing single-sided corrugated board using the single facer described above, the core paper is prevented from separating from the crimp roll due to its own elasticity and the centrifugal force accompanying the rotation of the crimp roll, and the core paper is A means for guiding it along the creasing roll is required.

For this reason, in the conventional single facer, fingers for guiding the core paper are arranged along the creasing roll from the meshing point of the top creasing roll and the down creasing roll to the contact point between the creasing roll and the pressure roll. Was.

Furthermore, since the fingers were arranged, it was necessary to provide finger grooves corresponding to the fingers on the surface of the gluing roll.

However, for this reason, glue cannot be applied to the wrinkled tops of the core paper corresponding to the fingers, resulting in so-called finger lines that cause a decrease in the strength of the corrugated board.

In addition, since the fingers are arranged in extremely narrow finger grooves, glue adheres and accumulates on the fingers, resulting in too much glue being attached to some of the wrinkled tops of the core paper, or the accumulated glue adhering to the wrinkled tops. In addition to scraping off glue and causing defects such as widening of the finger line, it was also necessary to insert the fingers accurately into the finger grooves to avoid contact between the fingers and the finger grooves. The task of resetting the fingers during roll maintenance was extremely troublesome.

Furthermore, in this type of single facer, in order to prevent the core paper guiding fingers from interfering with the movement of the wrinkled core paper and from damaging the core paper, After the core paper was glued while being slightly lifted from the surface of the crimp roll, it was again forcibly pushed into the corrugation of the crimp roll at the location where it was bonded to the liner paper.

However, it is difficult for the corrugated core paper, which has been lifted and wrinkled from the crimp roll, to come into full contact with the crimp roll again, and as a result, when laminating the liner paper to the core paper, the core paper This resulted in a distorted waveform and a decrease in the strength of the corrugated board, which was particularly noticeable when the core paper and liner paper were laminated during high-speed operation.

For this reason, instead of the conventional fingers for guiding the core paper, we manufactured single-sided corrugated cardboard equipped with a suction-type creasing roll that can suction and hold the core paper on the surface of the crimp roll and transfer it. A single phaser was considered.

Suction type creasing rolls are provided with a large number of suction holes on the roll surface, and the suction holes are either connected to the hollow part of the roll that maintains a pressure lower than atmospheric pressure, or are surrounded by the roll surface. Some machines have a circumferential groove and a suction pipe inserted into the groove, but in the former, the suction hole comes into direct contact with the core paper, so clogging tends to occur, and this tendency is particularly noticeable during high-speed operation.

In addition, since the suction area is limited to the suction hole, the ability to attract the core paper is weak, and if the core paper is operated at high speed, there will be parts where the core paper lifts off the roll surface, resulting in excessive sizing of the core paper. This has the disadvantage of producing defective products, and the latter requires the insertion of a suction pipe, so the groove width of the circumferential groove must be wide. Especially when the core paper is thin material, the absorbed core paper There is a risk of denting at the groove width, resulting in un-glued, insufficiently-glued, or defective molding, resulting in defective products.This tendency is especially noticeable during high-speed operation, when the groove width and groove bottom are at their maximum limit. Inserting a suction pipe would damage the suction pipe and groove, and inserting a suction pipe smaller than the groove size would reduce suction efficiency, making it unsuitable for high-speed operation.

Furthermore, since both of them are suction type creasing rolls, the core paper of the single-sided corrugated cardboard that comes out between the creasing roll and the pressure roll remains stuck to the creasing roll. There is a particularly strong tendency to move in the direction of rotation.

If this tendency of the core paper is left unaddressed, it will cause the single-sided corrugated cardboard to wrap around the creasing roll, and the liner paper will also cause problems such as poor seams between the liner papers, excessive braking on the liner paper, and other causes. If it breaks, the core paper will become wrapped around the creasing roll.

Furthermore, if the core paper breaks due to the same reasons as the liner paper, and as a result the glue is transferred to the exposed crimping roll, the liner paper or The re-supplied core paper easily wraps around the crimp roll.

As mentioned above, when one-sided corrugated cardboard, core paper, or liner paper is wrapped around the creasing roll, the wrapped paper is removed,
In order to clean the bottom creasing roll, not only is the equipment required to be stopped for a long time, but if the degree of wrapping is large, the support part of the top creasing roll and the support part of the pressure roll may be damaged, and the gluing roll may be damaged. There is a possibility that the roll may become distorted or become unusable.

The object of the present invention is to provide a single-sided fabric that can hold and transfer the core paper with strong suction even when the creasing roll rotates at high speed, and prevent damage and deformation of the core paper and the occurrence of over- or under-glued areas. An object of the present invention is to provide a single facer for manufacturing corrugated board.

Another object of the present invention is to immediately lower the single-sided corrugated cardboard, core paper, or liner paper fed out from the press-contact part between the crimping roll and the pressure roll when it comes out from the press-contact part. It automatically and reliably prevents the material from being peeled off from the creasing roll, moving in the direction of rotation of the creasing roll and wrapping around the creasing roll, and maintaining good quality without receiving any damage from the pressure welding part. To provide a single facer for producing single-sided corrugated cardboard which can be smoothly pulled out.

Furthermore, other objects of the invention will become apparent from the accompanying drawings and the following detailed description.

In accordance with the above object, the present invention provides an upper creasing roll and a roll that meshes with the upper creasing roll to wrinkle corrugated core paper, the roll for corrugating the crumpled core paper. In order to hold the suction, a plurality of circumferential grooves are surrounded on the surface thereof, the bottoms of the grooves are lower than the roll grooves, and a large number of suction holes are bored in the bottom of the grooves to hold the suction. a creasing roll whose holes communicate with at least one roll hollow portion maintained at a pressure lower than atmospheric pressure; gluing means for applying glue to the wrinkled tops of the crumpled core paper; a pressure roll that presses and bonds the liner paper sent to the glued core paper on the creasing roll; and the core paper that is sent out from between the crimp roll and the pressure roll. a single facer for manufacturing single-sided corrugated board, including a guide means consisting of a plate loosely fitted in the circumferential groove in order to release from the bottom creasing roll, an upper creasing roll, and the upper creasing roll. A roll that applies corrugated wrinkles to the core paper fed by meshing with the core paper, the roll having a plurality of circumferential grooves surrounding its surface surface in order to suction and hold the wrinkled core paper, The bottom of the groove is provided so as to be lower than the roll groove portion, and the bottom of the groove is provided with a number of suction holes, and the suction holes communicate with at least one roll hollow portion maintained at a pressure lower than atmospheric pressure. a crimp roll, a gluing means for applying glue to the wrinkle tops of the crumpled core paper, and a liner paper sent to the core paper on the crimp roll that is pasted with pressure. and a circumference provided with the suction hole in order to remove the core paper fed from between the bottom creasing roll and the pressure roll from the bottom creasing roll. The present invention discloses a single facer for manufacturing single-sided corrugated board, which is provided with a guide means formed of a plate loosely fitted into a circumferential groove surrounded by the surface circumferential surface of the creasing roll, in addition to the groove.

The present invention will be explained below based on the embodiment shown in FIGS. 1 and 2.

A single facer for manufacturing single-sided corrugated board includes an upper creasing roll 2, a lower creasing roll 3, a gluing means 5,
It includes a pressure roll 7 and guide means 4.

The upper creasing roll 2 can heat the roll by filling the hollow part 21 with superheated steam.

The lower creasing roll 3 meshes with the upper creasing roll 2 with a slight gap, and is connected to a drive machine (not shown).

In addition, the creasing roll 3 is provided with a plurality of circumferential grooves 32 on the roll surface so that the groove bottom surface 321 is located at the roll corrugation portion 31 or a lower portion thereof, and the groove bottom surface 321 is provided with a plurality of circumferential grooves 32 at the center of the roll. A large number of suction holes 33 arranged radially toward each other are bored, and the suction holes 33 communicate with a roll hollow portion 34 maintained at a pressure lower than atmospheric pressure.

Two or more roll hollow portions 34 may be provided inside the creasing roll 3.

Furthermore, a hole 351 communicating with the roll hollow portion 34 is formed in the support shaft 35 of the creasing roll 3, and the hole 351 is connected to a vacuum pump (not shown) via the roll joint 9.
It is familiar to

The gluing means 5 rotates in the opposite direction to the glue tank 51 containing the glue 511 and the creasing roll 3, so that the lower surface is immersed in the glue 511 and the upper surface is moving along the creasing roll 3. It consists of a gluing roll 52 arranged so as to come into contact with the wrinkle top 11 of the core paper 1, a doctor roll 53 for removing excess glue adhering to the gluing roll 52, and a doctor knife 54 for scraping off the glue on the doctor roll 53. There is.

The gluing roll 52 and doctor roll 53 are rotated in the same direction by a drive machine (not shown).

The pressure roll 7 is rotated by a drive device (not shown) in the opposite direction to the creasing roll 3 and can roll into contact with the creasing roll 3 under constant pressure.

Moreover, the pressure roll 7 can heat the roll by filling the roll hollow part 71 with superheated steam.

The guide means 4 consists of plates 41 arranged between the upper part of the creasing roll 3 and the pressure roll 7, and the lower part of each plate 41 is loosely fitted into each circumferential groove 32 of the creasing roll 3. Together with this, a substantially arc-shaped concave plate is formed which can be inserted into the pressure contact portion between the creasing roll 3 and the pressing roll 7.

The upper part of each plate 41 is supported by a support rod 42.

Instead of loosely fitting the plate of the guide means into the circumferential groove 32 in which the suction hole 33 is provided, as shown in FIGS. It may be loosely fitted into a circumferential groove 32B surrounded by the circumferential surface.

That is, the lower part of the plate 41B of the guide means 4B can be loosely fitted into each circumferential groove 32B of the creasing roll 3, and can also be inserted into the pressure contact portion between the creasing roll 3 and the pressure roll 7. It forms a generally arcuate concave plate, and the upper part is supported by a support rod 42.

The production of single-sided corrugated board using the single facer of the present invention will be explained below.

The fed core paper 1 is guided by the top creasing roll 2 and then sandwiched between the top creasing roll 2 and the bottom creasing roll 3.

At this time, the core paper 1 is heated by the upper creasing roll 2 while the circumferential grooves 3 are formed on the surface of the lower creasing roll 3.
2 while being strongly suctioned by the suction holes 33, and the corrugated wrinkles are reliably created.

The crumpled core paper 1 is transferred to the pressure contact portion between the crimp roll 3 and the pressure roll 7 while being held in close contact with the roll 3.

During the transition, the wrinkle peaks 11 of the core paper 1 are attached to the gluing roll 52.
Glued by.

When the core paper 1 comes between the crimp roll 3 and the pressure roll 7, it is bonded to the liner paper 6 that has been sent, and a single-sided corrugated board 10 is completed.

Since the plate 41 or 41B is recessed in the pressure contact area between the creasing roll 3 and the pressure roll 7, it is pasted with the liner paper 6 from between the creasing roll 3 and the pressure roll 7 to form the single-sided corrugated board 10. Core paper 1 being sent out
are separated so that they do not wrap around the surface of the creasing roll 3.

The suction mechanism of the single facer creasing roll of the present invention has a structure in which a large number of suction holes are bored in the bottom of a plurality of circumferential grooves provided at appropriate intervals on the roll surface. The width of the groove can be made as small as possible, and there is no risk of suction dents even if thin core paper is attracted with strong suction force during high-speed operation. Since the core paper is adsorbed through the
However, sufficient suction can be achieved, and even when operated at high speed, there is no problem with the suction mechanism or suction efficiency.

Furthermore, since the core paper is evenly adsorbed through the circumferential groove, adhesion to the roll surface is good, and defective products will not be produced due to insufficient or over-gluing due to poor adhesion.

In addition, the corrugation of the corrugated paper is perfect, so glue is evenly applied to the corrugated top of the corrugated paper, resulting in a high-quality product with uniform corrugation height.In addition, it is suitable for high-speed operation, which reduces production volume. A dramatic increase can be expected.

In addition, even though the creasing roll exerts a strong suction force and rotates at high speed, the guide means loosely fitted in the circumferential groove of the creasing roll prevents the surface of the creasing roll from moving around the surface. It is possible to prevent the single-sided corrugated board from getting caught up on the surface, and it is also possible to protect the single facer from unexpected accidents when the core paper or liner paper breaks.

The guide means can separate the plate loosely fitted into the circumferential groove of the creasing roll from the groove bottom with a considerable margin, so that paper dust, etc. in the suction hole at the groove bottom can be removed during high-speed rotation. Damage to the plate and the bottom of the circumferential structure due to clogging can be avoided, and since the plate can be fitted loosely with a considerable margin in the groove width, damage to the plate and the side wall of the circumferential groove can be avoided. It can be avoided.

If the guide means loosely fits the plate into the circumferential groove of the creasing roll where suction holes are not provided, there is no suction hole at the bottom of the groove, so damage to the plate or circumferential groove due to clogging can be avoided. There is no need to think about it, and since there is no suction hole at the bottom of the groove, the groove width can be made narrower and the plate thickness can be made thinner.Furthermore, there is no need for precision in plate manufacturing or fine adjustment when installing the plate. There are advantages.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional side view of the single facer of the present invention, and FIG. 2 is a cross-sectional view taken along the line X-X of FIG. 1 showing the guide means and creasing roll. Figure, 3rd
The figure is a longitudinal sectional side view showing a part of the single facer of the present invention provided with another guide means, and FIG. 4 is a sectional view taken along the line W--W in FIG. 3. 1...Corner paper, 11...Wrinkle top of core paper, 2...Top wrinkle roll, 3...
Creasing roll, 31...Roll tiered valley part,
32, 32B... Circumferential groove, 321...
Groove bottom of circumferential groove 32, 33...Suction hole, 34...
...Hollow part, 4...Guiding means, 41, 41
B... Plate, 5... Gluing means, 5
11...glue, 6...liner paper, 7...
...pressure roll.

Claims (1)

[Claims] 1. An upper creasing roll and a roll that meshes with the upper creasing roll to create corrugated wrinkles on the core paper being fed, the roll sucking the crumpled core paper. In order to hold the roll, a plurality of circumferential grooves are formed around the surface thereof, the bottoms of the grooves are provided to be lower than the roll grooves, and a large number of suction holes are bored in the bottom of the grooves, and the suction holes a creasing roll communicating with at least one roll hollow portion maintained at a pressure lower than atmospheric pressure; gluing means for applying glue to the wrinkled tops of the crumpled core paper; and the creasing roll. A pressure roll presses and bonds the liner paper sent to the glued upper core paper, and the core paper sent from between the creasing roll and the pressure roll is attached to the lower core paper. A single facer for manufacturing single-sided corrugated cardboard, comprising guiding means consisting of a plate loosely fitted in the circumferential groove for release from the creasing roll. 2. An upper creasing roll, and a roll that meshes with the upper creasing roll to create corrugated wrinkles on the core paper being fed, the roll being used to suck and hold the crumpled core paper. The circumferential surface is surrounded by a plurality of circumferential grooves, the bottoms of the grooves are provided so as to be lower than the roll grooves, the bottoms of the grooves are bored with a number of suction holes, and the suction holes have a pressure lower than atmospheric pressure. a crimping roll communicating with the maintained at least one roll hollow; gluing means for applying glue to the wrinkle crests of the crumpled core paper; A pressure roll that presses and bonds the liner paper sent to the core paper, and the core paper that is sent out from between the base creasing roll and the pressure roll from the base creasing roll. manufacturing a single-sided corrugated board having a circle provided with the suction holes for the purpose of releasing the material; and a guide means consisting of a plate loosely fitted in a circumferential groove surrounded by the surface circumferential surface of the creasing roll, in addition to the circumferential groove. Single facer.