JPS5915304B2 - Single facer for single-sided corrugated board manufacturing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single facer for producing single-sided corrugated board, and more particularly to an apparatus capable of corrugating core paper by adsorbing the core paper to a corrugating roll.

Conventionally, in the case of a single facer, there is a process from the position where the first stage forming roll and the second stage forming roll engage to the position where the core paper and liner paper are bonded by the second stage forming roll and the pressing roll. Finkers for guiding the core paper were arranged to align the core paper with the second-stage forming roll.

However, there are disadvantages such as so-called finker lines, which prevent the core paper from adhering to the liner paper, and glue that adheres to the fingers and solidifies, which scrapes off the glue applied to the corrugated top of the core paper. Therefore, a device has been proposed in which suction holes are provided on the entire circumferential surface of the second-stage forming roll instead of fingers.

(Unexamined Japanese Patent Publication No. 52-148394) However, if suction holes are provided instead of fingers in the second forming roll, the paper width of the core paper may vary depending on the width of the core paper when producing single-sided corrugated cardboard. As the width of the core paper decreases, the glue of the gluing roll is applied to the core paper of the entire length of the second-stage forming roll. There is a drawback that the glue is transferred and accumulated on the steps of the second-stage forming roll, and then when the core paper of the entire length and width of the second-stage forming roll is formed into steps, the forming is not performed sufficiently.

The present invention solves these drawbacks, and even if the thickness and width of the core paper vary, it is possible to uniformly apply glue to the top of the corrugated corrugated paper, and the glue is transferred to the second-stage forming roll. A first-stage forming roll and a second-stage forming roll that mesh with the first-stage forming roll to form corrugations on the supplied core paper; A gluing roll that glues the corrugated top part of the corrugated corrugated paper, and a press roll that laminates the liner paper to the glued corrugated paper fed by the second-stage molding roll together with the second-stage molding roll. A core paper is perforated at the bottom of the surface of the second-stage forming roll from the meshing position of the first-stage forming roll and the second-stage forming roll to the vicinity in front of the gluing position of the gluing roll. A first suction device adsorbs the core paper through a through hole, and a second-stage forming roll and a suppression roll move the core paper from the position where gluing of the core paper is completed to the vicinity of the position where the liner paper is laminated to the core paper. A connection switching device is provided in a passage that connects a second suction device that adsorbs the two-stage forming roll through the through-hole and a pressure device and one of the suction devices at a gluing position of the core paper. and a gluing adjustment device that connects or closes the through holes to a pressure device or one of the suction devices to separate, adsorb, or bring the core paper into close contact with the second-stage forming roll. Features.

An example of the implementation of the present invention will be explained with reference to FIGS. 1 to 4.

FIG. 1 is a drawing showing the entire actual device, in which 1 is a first-stage forming roll that feeds the core paper a fed through a moisture 5 while paralleling it, and 2 is a first-stage forming roll. A second stage forming roll meshes with 1 to form steps on the core paper a, 3 is a gluing roll that glues the core paper a formed into steps by both step forming rolls 1 and 2, and 4 is a glued roll. A pressure roll for laminating liner paper to core paper a is shown.

The first stage forming roll 1 has a stepped portion 1a for forming steps on its outer peripheral surface.
It has a steam conduction path 1b for heating the core paper a on the axis side thereof.

The second stage forming roll 2 has an outer cylinder 6 as shown in FIGS. 2 and 3.
and an inner cylinder T, the outer peripheral surface of the outer cylinder 6 is provided with a stepped part 2a for step forming, a through hole 2c is bored in the bottom part 2b between the stepped parts 2a, 2a, and the bottom part 2b is formed with a through hole 2c. A long groove 7a reaching one end of the inner cylinder 7 was formed on the outer peripheral surface of the inner cylinder 7 corresponding to the position, and the long groove 7a was connected to the through hole 2c.

The inner cylinder 7 has a steam conduction path 7b on the axis side for heating the core paper a.

Reference numeral 8 denotes a disc valve for configuring the first suction device 9, the second suction device 10, and the gluing adjustment device 11, which slides into contact with the open end side of the long groove 7a of the inner cylinder 7 of the second-stage forming roll 2. This is what I did.

In the disc valve 8, the opening of the long groove 7a of the inner cylinder 7 of the second-stage forming roll 2 changes to the first opening as the second-stage forming roll 2 rotates.
A first opening 8a connected to a pressure reducing device (not shown) in a region passing through a position corresponding to the position in front of the gluing position of the gluing roll 3 from the meshing position of the step forming roll 1 and the second step forming roll 2; As the opening of the long groove 7a rotates, the second-stage forming roll 2 and the press roll 4 apply the liner paper to the core paper a from the position where the gluing of the core paper a is completed. A second opening 8b connected to a pressure reducing device (not shown) is provided in a passing area corresponding to the vicinity of the matching position, and an opening of the long groove 7a is inserted into the core paper a as the second-stage forming roll 2 rotates. A third pressure device, such as a compressor, is connected to the first opening 8a through a three-way valve 8e as a connection switching device to a region through which the application roll 3 passes corresponding to the gluing position.
The opening 8c and the opening of the long groove 7a form the second stage forming roll 2.
With the rotation of , the first-stage forming roll 1 and the second-stage forming roll 2 engage with each other from the position where the second-stage forming roll 2 and the press roll 4 complete the bonding of the core paper a and the liner paper sheet. A fourth opening 8d connected to a compressor (not shown) is provided in a region corresponding to the vicinity of the front position and through which the passage passes.

Therefore, the long groove 7a formed in the inner cylinder 7 of the second stage forming roll 2 by the reduced pressure from the first opening 8a of the disc valve 8.
Through the opening, the core paper a is inserted into the through hole 2c of the step bottom 2d of the outer cylinder 6 from the meshing position of the first-stage forming roll 1 and the second-stage forming roll 2 to the vicinity in front of the gluing position of the gluing roll 3. A first suction device 9 for adsorbing the second-stage forming roll 2 is configured.

Similarly, through the long groove 7a opening formed in the inner cylinder 7 of the second stage forming roll 2 by pressure reduction from the second opening 8b of the disc valve 8, the through hole 2c of the step bottom 2b of the outer cylinder 6 is opened to the core paper a.
2nd stage forming roll 2 and pressing roll 4 from the gluing completion position.
This constitutes a second suction device 10 that causes the core paper a to be attracted to the second-stage forming roll 2 up to the vicinity of the position where the liner paper is bonded to the core paper a.

In the first opening 8a of the disc valve 8 constituting the first suction device 9, the opening position of the first opening 8a at the position where the first forming roll 1 and the second forming roll 2 mesh with each other is varied back and forth. Timing adjustment valve 8f for adjusting the adsorption start position of paper a to the second stage forming roll 2
The opening area of the first opening 8a is adjusted by adjusting the timing adjustment valve 8f.

Similarly, in the second opening 8a of the disc valve 8 constituting the second suction device 10, the second forming roll 2 and the pressing roll 4 are located near the position where the core paper a and the liner paper are bonded together. A timing adjustment valve 8g is provided for varying the opening position of the opening 8b back and forth and adjusting the position at which core paper a is released from adsorption to the second-stage forming roll 2.

8h is an atmospheric communication hole for releasing the negative pressure in the through hole 2c of the second-stage forming roll 2.

Further, the third opening 8c of the disc valve 8 is connected to the long groove 7 formed in the inner cylinder I of the second-stage forming roll 2 in three ways: reduced pressure, positive pressure, or closure by a three-way valve 8e as a connection switching device.
Through the opening a, the through hole 2c constitutes an adjustment device 11 for separating, adsorbing or adhering the core paper a from the second stage forming roll 2 at the gluing position of the core paper a.

Further, the second-stage forming roll 2 is inserted into the center core by the press roll 4 through the long groove 7a opening formed in the inner cylinder 7 of the second-stage forming roll 2 by pressurizing the fourth opening 8d of the disc valve 8. While rotating from the position where the paper a and the liner paper sheet are bonded to the vicinity of the position where the first stage forming roll 1 and the second stage forming roll 2 engage with each other, the stepped portion 2a of the second stage forming roll 2, Blow out compressed air from the bottom 2b between 2a and the second
A device 12 for cleaning the outer circumferential surface of the corrugated forming roll 2 is configured.

To explain the operation of this molding device, the core paper a, which has been humidified and heated through the moisture 5, stays on the first-stage forming roll 1, and the first-stage forming roll 1 and the second-stage forming roll 2 are engaged with each other. When the core paper a is fed near the position, the core paper a passes through the second forming roll 2
The outer cylinder 6 of the second-stage forming roll 2 is
The material is attracted to the second-stage forming roll 2 by suction through the through holes 2c, and is fed to the meshing position between the first-stage forming roll 1 and the second-stage forming roll 2, where it is formed into stages.

At this time, the core paper a is fed at the same speed as the first forming roll 1.
The core paper a is fed to the second-stage forming roll 2 in such a way that the core paper a is fed to a position suitable for corrugating, depending on the degree of adhesion between the core paper a and the degree of contact between the stepped portions of the first and second-stage forming rolls 1 and 2, etc. The adsorption start position is adjusted by the timing adjustment valve 8f.

The corrugated core paper a is adsorbed by the second-stage forming roll 2 from the meshing position of the second-stage forming roll 2 with the first-stage forming roll 1 to the vicinity in front of the gluing position of the gluing roll 3. It is heated and shaped by the stepped forming rolls 2 and then fed.

Next, when the core paper a reaches the position where it is pasted by the glue roll 3, if the width of the core paper a is smaller than the width of the second stage forming roll 2, the glue on the pasting roll 3 is pasted onto the second stage forming roll. In order to apply glue to the corrugated top of the core paper a while preventing it from transferring to the core paper a, the gluing adjustment device 11 communicates the through hole 2c of the second stage forming roll 2 with the pressurizing device through the three-way valve 8e. The core paper a is separated from the second stage forming roll 2 by forcibly pressurized together with the centrifugal force of the feeding of the paper a by the second stage forming roll 2, and is floated, thereby gluing only the corrugated top of the core paper a. Close.

In addition, when the core paper a is thick, the three-way valve 8e is communicated with the first opening 8a so that the gluing roll 3 can apply an appropriate amount of glue without deforming the molded steps of the core paper a. Accordingly, the core paper a is adsorbed onto the second-stage forming roll 2 through the through holes 2c of the second-stage forming roll 2.

Furthermore, in order to apply an appropriate amount of glue to the core paper a according to changes in the thickness, feeding speed, width, etc. of the core paper a in such a gluing process, the core paper a is coated with a second layer as described above. Gluing adjustment device 11 adjusts the state of detachment, adsorption, or adhesion to the stepped forming roll 2
This is done by

The core paper a that has been glued is then transferred to the second forming roll 2.
When the core paper a is fed at the second stage forming roll 2
The second suction device 10 adsorbs the second-stage forming roll 2 to the second-stage forming roll 2 by suction through the through-hole 2c of the outer cylinder 6, and the second-stage forming roll 2 is sucked from the pasting completion position of the core paper a. The core paper a and the liner paper of the press roll 4 are fed to the vicinity of the bonding position two positions in front of each other, and the steps formed on the core paper a are not deformed.

At this time, if the adsorption release position of the core paper a to the second stage forming roll 2 does not match the position where the liner paper is laminated, there will be an inconvenience that the steps formed on the core paper a will be deformed. , feeding speed of core paper a of second stage forming roll 2, core paper a
Considering the degree of adhesion with the second stage forming roll 2, the thickness of the core paper a, the paper quality, etc., the core paper a and the liner paper are good because they prevent the stages of the core paper a from being deformed. The adsorption release position of the second-stage forming roll 2 is adjusted by the timing adjustment valve 8g so that a suitable bonding can be achieved.

The core paper a and the liner paper are pasted and supplied, and the second stage forming roll 2 moves from the position where both papers a and b have been pasted to the meshing position of the first stage forming roll 1 and the second stage forming roll 2. When rotating to the vicinity of , the through hole 2C of the outer cylinder 6 of the second stage forming roll 2
The stepped portion 2 of the outer cylinder 6 is cleaned by compressed air from the cleaning device 12.
Paper scraps and the like adhering to a, 2a and bottom part 2b are removed to prepare for engagement with the next first stage forming roll 1.

In the actual case, the second stage forming roll 2 is composed of an outer cylinder 6 and an inner cylinder 7, and the first suction device 9 is formed by the through hole 2c of the outer cylinder 6 and the long groove 7a of the inner cylinder 7. Since the second suction device 10, the sizing adjustment device 11, and the cleaning device 12 can be inhaled and exhausted, the steam conduction path 7b can be formed on the axis side of the inner cylinder 7 of the second-stage forming roll 2, and the To enable heat forming of columns without being affected by the paper quality of core paper a.

According to the present invention, the core paper is adsorbed onto the second stage forming roll by the first suction device and the second suction device through the through holes bored at the bottom of the stage on the surface of the roll, and the paper is stacked in stages. Since the so-called finger line that occurs when using conventional fingers is not generated, the glue adheres to the fingers and solidifies, which causes the glue applied to the corrugated top of the core paper to Gluing can be done without causing problems such as scraping off.

Furthermore, the first suction device moves the core paper onto the second-stage forming roll from the meshing position of the first-stage forming roll and the second-stage forming roll to the vicinity in front of the gluing position of the gluing roll. Since the adsorption is carried out through the through-holes drilled in the bottom of the corrugation, corrugation on the core paper is performed well, and when the corrugated paper is at the gluing position, the gluing adjustment device pressurizes the through-holes. The device is connected to one of the suction devices, or is closed, and the paper width and thickness of the core paper,
Depending on the feeding speed, etc., the core paper is removed from the second stage forming roll, adsorbed, or brought into close contact with the core paper, and the amount and position of the glue applied to the top of the core paper are adjusted, and the glue on the glue-applying roll is adjusted. Transfer to the second-stage forming roll can be prevented, and the second-stage forming roll is not contaminated, and the second adsorption device
Since the core paper is adsorbed to the second-stage forming roll from the position where the pasting of the core paper is completed to the vicinity of the position where the second-stage forming roll and the pressure roll bond the core paper and the liner paper, the core paper The corrugations formed on the paper are fed while being held by the corrugations of the second-stage forming roll without being deformed, and bonded to the liner paper in good condition, resulting in the production of high-quality single-sided corrugated cardboard.

[Brief explanation of the drawing]

What is shown is an example of the actual leprosy of the present invention.
The figure is an overall explanatory diagram, Figure 2 is a perspective view of the second stage forming roll,
Figure 3 is a sectional view taken along line I-1 in Figure 2, and Figure 4 is a cross-sectional view taken along line I-1 in Figure 2.
It is a sectional view taken along the line V-IV. 1...First stage forming roll, 2...Second
Step forming roll, 3... Gluing roll, 4...
...Press roll, 9...First suction device, 10.
...Second adsorption device, 11...Gluing adjustment device.

Claims (1)

[Claims] 1. A first-stage forming roll, a second-stage forming roll that meshes with the first-stage forming roll and forms corrugations on the supplied core paper, and a core paper that is corrugated with the second-stage forming roll. and a press roll that laminates the liner paper together with the second-stage forming roll to the glued core paper fed by the second-stage forming roll. The core paper is passed from the meshing position of the first-stage forming roll and the second-stage forming roll to the vicinity in front of the gluing position of the gluing roll to the second-stage forming roll through the through hole drilled in the bottom of the corrugated surface. The first suction device adsorbs the core paper, and the core paper is transferred to the second-stage forming roll from the position where pasting of the core paper is completed to the vicinity of the position where the second-stage forming roll and press roll laminate the liner paper to the core paper. A second adsorption device that adsorbs the core paper through the through-hole, and a connection switching device is installed in a passage that connects the through-hole to the pressure device and one of the adsorption devices at the gluing position of the core paper. and a gluing adjustment device that connects or closes the through holes to a pressure device or one of the suction devices to detach, adsorb, or bring them into close contact with the second-stage forming roll. Single facer-0 for corrugated board manufacturing