JPH0985859A - Manufacture of corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to improve the reliability and productivity of an apparatus for manufacturing a corrugated fiberboard by satisfactorily preventing the occurrence of 'warpage' which has heretofore been unavoidable. SOLUTION: The apparatus for manufacturing a corrugated fiberboard comprises a double facer IVa having a pasting unit 13a disposed directly after the outlet of a single facer IIIa to feed the single-faced corrugated fiberboards a4, b4 formed by the factor IIIa to the facer IVa without retaining as prior art to immediately paste them. Thus, the 'temperature irregularity' or 'moisture irregularity' due to the retention for a long time is eliminated, and the fiberboards having homogeneous properties of the parts are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a corrugated sheet manufacturing machine.
(Hereinafter, referred to as a corrugated machine) and a corrugated board manufacturing apparatus applied to a manufacturing machine for cardboard, hardboard, and the like.

[0002]

2. Description of the Related Art Conventionally, for example, a corrugating machine as shown in FIG. 13 has a dry end II behind a wet end I.
Is composed of a single-face portion III and a double-face portion IV arranged in series in the processing direction (right direction in the drawing), and the dry end II is also in series in the processing direction (right direction in the drawing). It is composed of a division processing section V and a loading section VI which are arranged side by side.

As shown in FIG. 14, the single face portion III of the wet end I has a pair of single face portions II toward the processing direction (to the right in the drawing).
I1, III2 are provided in series, and each single face part I
Core papers c1 and c2 and back liner papers d1 and d2 are pulled out from the roll-shaped base papers a1, a2 and b1, b2 at the base paper supply units arranged at II1 and III2, respectively. After the core papers c1 and c2 are formed into a corrugated shape, the back liner papers d1 and d2 are glued to the corrugated core papers c1 and c2, whereby the corrugated corrugated cardboards of the A and B stages are formed. Paper is formed.

As shown in FIG. 15, the corrugated corrugated cardboards of the A-stage and the B-stage are conveyed by conveyors VIII1 and VIII2.
Thus, they are conveyed while being retained separately in a waveform loop at a low speed synchronized with the next double face portion IV.

On the other hand, in the double face part IV, in particular in FIG.
As shown in FIG. 2, after the above-mentioned single corrugated paper sheets e1 and e2 of the A and B stages and the front liner paper d3 are heated by the respective heaters of the three-stage preheater IV1, the two-stage gluing device IV2 Through the above, the corrugated corrugated tops of the corrugated corrugated papers of the A and B stages are pasted and introduced into the double facer IV3 as a processing unit.

The double facer IV3 is composed of a heating part IV4 in the front stage and a cooling part IV5 in the rear stage. The double facer IV3 is provided in the upper belt 1 and the cooling part IV5 which are hung over the entire length of these parts. With the lower belt 2, the corrugated corrugated paper e1 of the above A and B steps,
e2 and the front liner paper d3 are conveyed while being polymerized to form a double-faced corrugated board web. A heating plate group 3 for heating the front liner paper d3 is provided in the heating unit IV4 in the preceding stage, and this heating plate group 3 is also provided.
The pressurizing device 4 is arranged on the above.

The pressure device 4 is composed of a pressing roll or an air pressure device provided on the upper belt 1 so as to press the double-faced corrugated fiberboard web. Heat is received and the temperature is raised by sliding running while contacting the top, and the glue is solidified and the adhesion is completed.
The double-faced corrugated cardboard web thus formed by adhesion is sent to the cooling section IV5 at the subsequent stage, and is sent to the division processing section V at the next stage while being cooled by the upper belt 1, the lower belt 2 and the pressurizing device 4. Go.

In the next division processing section V, the double-sided corrugated board web is cut off and both ends are cut by the rotary shear V1 when the material and size are changed.
Slitting and creasing (creasing) are applied at V2, and cutting is performed at cutoff V3 to form a plurality of divided plate-like pieces (corrugated cardboard sheets).

Next, each of these divided plate-like pieces (corrugated cardboard sheets) is introduced into the stacking section VI1, and as shown in FIG. 17, in particular, the sheet conveying conveyor VI1a of the stacking section VI1.
The sheets are conveyed toward the stacking device VI2 while being piled up like a roof tile. Then, each of these divided plate-shaped pieces (corrugated cardboard sheets) is stacked in a rod shape by the stacking device VI2, and discharged as a product out of the machine.

[0010]

However, the corrugated cardboard sheet produced in this manner is a kind of structure composed of five or three layers of paper as described above, and is used as a product when finished or stored. It has been found that the paper expands and contracts due to "temperature unevenness" or "moisture unevenness" at the time, resulting in various "warps".

As a cause of occurrence of "temperature unevenness" or "moisture unevenness", it is necessary to provide a long distance between the single facer portion and the double facer portion due to the construction of the machine as described above. One example is that corrugated corrugated paper stays in a corrugated shape. That is, as shown in FIG. 18A, when the corrugated corrugated paper sheets are superposed in a corrugated shape,
The temperature distribution and the humidity distribution are generated as shown in FIG. Further, when the production rates of the individual corrugated cardboard papers to be polymerized are different, a temperature difference and a water content difference occur between the liner paper and the core paper. In particular, in the glued part, it has been recognized that the amount of glue attached changes depending on the production speed. This is because the paste is liquefied with an amount of water which is 3 to 4 times the amount of starch, and therefore, an excessively small amount of the adhered paste appears immediately as a difference in the water amount between the single-sided corrugated paper and the double-sided corrugated paper (double-sided corrugated paper). Thought to be from.

Further, in the stacking section VI, as shown in FIG. 19 (a), some of the corrugated board sheets are transferred while being piled up in a roof tile shape.
As shown in (b), similar temperature unevenness or moisture unevenness is caused. Thus, in the conventional device,
In some cases, single-faced corrugated paper with different properties may be produced in each part, which causes various "warpage" as shown in FIG. 20 (a) shows an upward warp, FIG. 20 (b) shows a downward warp, FIG. 20 (c) shows a twist warp, and FIG. 20 (d) shows an S warp.

That is, it is generally experimentally confirmed that the water content of the base paper and the expansion and contraction of the paper easily expand and contract within a range of several%. For example, after the base paper is moistened,
It has been confirmed that a residual strain of about 0.1% of the original length is generated by repeating heating to dissipate water and further giving water. Also, the expansion and contraction rate and the amount of residual strain are
It has been confirmed that there is a difference between the width direction and the length direction of the base paper depending on the fiber direction. When processing a base paper that basically has such complicated physical property values, water and temperature increase are repeated as in the above corrugated board manufacturing apparatus, and "temperature unevenness" or "moisture unevenness" is generated. The occurrence of "warping" is a very disadvantageous manufacturing condition.

Once such "warpage" occurs in the corrugated cardboard sheet, it may cause a machine stoppage in a printing box making machine, a punching machine, a boxing machine, etc. in the subsequent process, which causes the corrugated board production. Not only is the productivity of the device significantly reduced, but it is also a cause of frequent defective products.
Therefore, in the present situation, in order to prevent the occurrence of the above-mentioned "warpage", the sheet piles stacked in a rod shape are manually
Measures are taken such as reversing and re-loading every 30 sheets or stacking piled sheet piles on top of each other and stacking and tightening bands. In addition, the stacked sheet piles are often completely wrapped with a vinyl sheet so as to prevent the occurrence of warpage by blocking the influence of outside air.

As described above, in the conventional corrugated board manufacturing apparatus,
The occurrence of "warp" in the corrugated board is an unavoidable problem as the fate of the corrugated board, and this "warp" causes many defective products and consumes a lot of labor and cost. It is the cause.

[0016] Therefore, an object of the present invention is to provide a corrugated board manufacturing apparatus capable of satisfactorily preventing the occurrence of "warp" which has been inevitable in the past and improving reliability.

[0017]

In order to achieve the above object, the invention according to claim 1 supplies a base paper containing a roll-shaped base paper formed by winding a core paper, a back liner paper and a front liner paper. Section and the core paper drawn from the roll-shaped raw paper of this base paper supply unit are formed into a corrugated shape, and the back liner paper drawn from the roll-shaped raw paper is attached to the corrugated core paper by gluing. And a single face part that forms a piece of corrugated paper,
Adhesive is applied to the corrugated corrugated top of the single-faced corrugated cardboard formed with the single face part, and the front liner paper drawn from the roll-shaped base paper is pasted to the glued part of the single-faced corrugated cardboard and then heated A double-face portion that pressurizes to form a strip-shaped double-sided corrugated web, a split processing portion that performs predetermined processing on the double-sided corrugated paper formed by the double-face portion to form a split plate-like piece, and feed from this split processing portion. In a corrugated board manufacturing apparatus composed of an integrated corrugated board sheet manufacturing line equipped with a stacking section for traveling the stacked divided plate-shaped pieces, stacking them in a rod shape, and discharging them out of the machine, a single corrugated cardboard sheet formed by the single face section The gluing part of the double face part is arranged immediately after the outlet part of the single face part so that the gluing part can be immediately fed to the double face part without stagnation and glued. It has been made to.

According to the above-mentioned means, the single-faced corrugated paperboard formed by the single face portion is sent to the double face portion without being retained as in the conventional case, and the paste is immediately applied. Therefore, "temperature unevenness" or "moisture unevenness" due to long-term retention can be satisfactorily prevented, and a single-faced corrugated paper board with uniform properties in each part can be produced.

According to the second aspect of the present invention, the single-face part according to the first aspect has a plurality of processing units arranged in a vertical stack, and a single corrugated board is provided between the respective processing units. Equipped with a drive control mechanism that conveys paper and front and back liner paper at approximately the same speed, and has a configuration in which the gluing parts of the double face part are arranged in multiple layers in the vertical direction in correspondence with the processing part of the single face part. Has been done.

In the means according to the second aspect, various processing operations such as heating, watering, step processing, and gluing in the gluing portions of the plurality of single-face portions and double-face portions are simultaneously performed, Variations in temperature and moisture in the single-faced corrugated paper sent from the single-faced portion and the double-faced glued portion are eliminated, and the production conditions for the single-faced corrugated paper to be laminated are homogenized.

Further, in the invention according to claim 3, the double face portion according to claim 1 and the single face corrugated paper sent from each of the single face portion and the gluing portion of the double face portion according to claim 2・ A pair of upper and lower belts that sandwich the backing liner paper while sandwiching them, belt heating means that raises the upper and lower belts to a predetermined temperature, and elastically presses the upper and lower belts so as not to crush the corrugated cardboard paper. Roll pressing means, drainage means for absorbing and diffusing moisture in the double-sided corrugated board web, and belt cleaning means for cleaning the surfaces of the upper and lower belts.

In the means as described in claim 3, the temperature of the single-faced corrugated paper and the front liner paper is raised, and at the same time, the polymerization and the adhesion are started. The solidification and the moisture release are performed uniformly and quickly by the drainage means.

The invention according to claim 4 is the same as claim 1.
The double-face part described above is provided with a humidity control part for equilibrating the temperature and water content of the double-sided corrugated fiberboard webs laminated by heating and pressurizing.

In the means according to the fourth aspect, the double-faced corrugated cardboard web fed from the double face portion is brought into equilibrium by the humidity control portion, particularly in the temperature and moisture states of the front liner paper and the back liner paper. At the same time, it is balanced with the atmospheric condition of the apparatus, and suitable manufacturing conditions are set.

The invention according to claim 5 is the same as claim 1
The stacking unit described above is configured so as to have a transport speed that separates the divided plate-shaped pieces sent from the divided processing section and separates the divided plate-shaped pieces so that they do not overlap each other.

According to the above-mentioned means, the whole surface of the split plate-shaped piece sent out from the split processing section is exposed to the outside air, and uniform drying and heat radiation are carried out. It is designed to prevent uneven moisture and temperature.

On the other hand, in the means described in claim 6, the base paper supply section according to claim 1 has a structure independent of other parts, and in the transport path toward the single face part, from the roll-shaped base paper. Tension control means for keeping the tension of the drawn back liner paper, core paper and front liner paper substantially constant, and the water content and temperature of the back liner paper, core paper and front liner paper drawn from the winding base paper to a predetermined value. Humidifying / heating means as conditions,
It is configured with.

In the base paper supply section according to the sixth aspect, the roll-like base paper is independently and uniformly stored without being affected by the outside air, and the back liner pulled out from the roll-like base paper is used. Since the tension, moisture, and temperature conditions of the paper, core paper, and front liner paper are maintained substantially constant, the paper is supplied to the single face part, so that a highly uniform single-faced corrugated paper is formed. There is.

The means according to claim 7 is provided in the single-face part and the double-face part according to claim 1, and is a sensor for measuring the temperature and moisture of the core paper, the front and back liner paper, and the double-faced corrugated board web. The temperature and moisture values of the above core paper, front and back liner paper, and double-sided corrugated board web are controlled based on the detection signal from the sensor to minimize the warp of the double-sided corrugated board sheet and predict the warpage due to aging to ensure quality. It is configured to include a product control device having a temperature and moisture controller for controlling, a presetting device, and a control system having a centralized control panel.

According to the product control device of the seventh aspect, the temperature and moisture values of the core paper, the front and back liner paper, and the double-faced corrugated board web are constantly maintained in a suitable state in each part, and The warp is minimized, and the centralized control is performed so as to predict the warp due to changes over time and control the quality.

The means according to claim 8 has a structure including a soundproof / heatproof chamber for separating the single face portion and the double face portion according to claim 1.

In the base paper supply section according to the eighth aspect, since the insides of the single-face section and the double-face section are shielded from the external atmosphere, good manufacturing conditions are maintained and heat to the outside of the machine is maintained. The emission and sound leakage are reduced and the working environment is improved.

[0033]

Embodiments of the present invention will be described below in detail with reference to the drawings. The corrugating machine according to the present invention shown in FIG. 1 has a base paper supply unit IXa on the most upstream side of the process (the left end side in the drawing), and a wet end Ia and a dry end IIa are arranged in series behind it. It is located in.

The base paper supply section IXa is constructed so as to have a structure independent from other parts, particularly as shown in FIG. 2, and may utilize a part of the base paper warehouse or may be completely separate. It is provided as a nice room. This base paper supply department
IXa stores roll-shaped base papers a1, a2, b1, b2 and b3 formed by winding core papers c1 and c2, back liner papers d1 and d2 and front liner paper d3, respectively. Each of these roll-shaped base papers a1, a2, b1, b2 and b3 is replaceably introduced onto the carry-in rail 5 by an automatic base paper conveying device or a forklift (not shown), and moved to a predetermined work position to stand by. Is configured.

Core papers c1 and c2 drawn from the above roll-shaped base papers a1, a2, b1, b2 and b3, back liner paper d
1, d2 and the front liner paper d3 are passed through the automatic paper threading device 6 and the single face portion IIIa of the wet end Ia.
When the base paper being supplied is finished or switched, the automatic paper splicing device (not shown) provided at the replacement position performs splicing with the new base paper. Has become.

The wet end Ia is provided with a single face portion IIIa and a double face portion IVa in series, and is a single independent house which is insulated from the outside atmosphere for soundproofing, heat insulation and moisture insulation. It is housed indoors, and is configured to maintain good manufacturing conditions and reduce heat dissipation and sound leakage to the outside of the machine. Among them, the single face portion IIIa is a single corrugated cardboard paper obtained by bonding the back liner paper d1 drawn from the roll-shaped raw paper of the raw paper supply section IXa to the corrugated core papers c1 and c2 by gluing. To form.

The automatic paper threading device 6 extends to the entrance of a single facer III1 as a processing unit, and a tension control device 7 as a tension control means is arranged in the middle thereof. The tension control device 7 maintains the tension of each base paper fed by the automatic paper threading device 6 at a predetermined tension that matches the operating conditions, and particularly reduces the fluctuation of the tension of each base paper introduced into the single facers III1 and III2. It has a function to do.

At this time, in particular, as shown in FIG.
On the lower surface side of the paper guide plates 19, 19 for the back liner paper d1 provided on the rear side of each of the automatic paper threading devices 6, the sheet heaters 20, 20 for heating the back liner paper d1 to a predetermined temperature are provided. , And the single facer II in each of the paper guide plates 19 described above.
A moisture adjusting device 18 is arranged at the entrance to I1 and III2. Also, a paper guide plate 1 for the core papers c1 and c2
Humidity control devices 17 and 17 for applying humid air or water or a hot water shower for sufficiently moistening the core papers c1 and c2 are arranged at the entrances of the single facers III1 and III2 of 9 and 19, respectively. ing. At this time, the temperature raising conditions and the humidifying conditions by the respective surface heaters 20, the moisture adjusting device 18, and the humidity adjusting device 17 are set so as not to vary between the base papers.

On the other hand, at the bottom of the single face portion IIIa, there is provided a transport passage for passing the front liner paper d3 fed from the automatic paper threading device 6, and the inlet end of the transport passage. Further, the moisture adjusting devices 18 and 18 are respectively arranged at the outlet ends, and the planar heater 20 is mounted on the lower surface side of the transfer passage. At this time, the temperature raising condition and the humidifying condition by the sheet heater 20 and the water content adjusting device 18 are set so as to have a good relationship among the base papers.

As described above, the automatic paper threading device 6 for the single face portion IIIa includes the core papers c1 and c2, the back liner paper d1 and
It is configured to homogenize the water content in d2 and the front liner paper d3. In other words, it was found that the moisture imbalance due to the difference in moisture content or the influence of moisture migration in the subsequent process causes the occurrence of "warpage" in the final product,
The moisture can be adjusted by the humidity controller 17 and the moisture controller 18.

The above-described sheet heater 20 is attracted and fixed to the paper guide plate 19 directly or as shown in FIG. The entire surface of the paper guide plate 19 is uniformly heated by electric power supplied from 23, and the paper guide plate 19 is planarly heated.

Single facers III1 and II as processing units
I2 consists of a pair of identical devices, both single facers III
1 and III2 are arranged so as to overlap each other in two stages in the vertical direction. Thus, a pair of single facers III1,
By arranging III2 at the same position in the flow direction of the process (rightward in the figure) in an overlapping manner, each processing operation in each single facer III1, III2 is performed under the same conditions and at the same timing. ing.

A planar heater 20 for heating each of the core papers c1 and c2 fed from the automatic paper threading device 6 to a predetermined temperature is provided on the lower surface side of the inlet passage of each of the single facers III1 and III2. An upper roll 10 which is provided and which forms the corrugated core papers c1 and c2 heated by the planar heater 20 behind the inlet passage.
And a set of lower rolls 11 is arranged. Further, on the side of the upper roll 10, corrugated core papers c1 and c2 are formed.
Roll device 12a, 12a for gluing the corrugated step top
Are arranged respectively. The above-mentioned sheet heater 20
Has the same configuration as that described above (see FIG. 4).

At this time, heaters H for imparting an ironing effect at the time of corrugation are built in the upper roll 10 and the lower roll 11, respectively, and the roll temperature is fine and rapid by each of these heaters H. It is configured to be adjusted. Further, belts 14a, 14a constituting a pressurizing device are elastically pressed against the upper side surface of the upper roll 10 in the figure, that is, the position immediately after gluing. The back liner paper d1 fed from the automatic paper threading device 6 is configured to be laminated and bonded to the corrugated core papers c1 and c2 at the pressure contact portions of the belts 14a and 14a. .

As described above, both single facers III1 and III2
The respective parts constituting the above are arranged at the same position in the flow direction of the process, and are set under substantially the same heating / humidifying conditions and at substantially the same operating speed, so that the A stage and The B corrugated cardboard sheets a4 and b4 are formed under the same conditions and at the same timing.

Further, a double face portion IVa is arranged at the rear portion of each of the single facers III1 and III2.
This double face part IVa is a single facer III1, I
Corrugated corrugated paper a4 and b4 of A and B formed by II2
Adhesive is applied to the A and B layers of corrugated cardboard a4,
The front liner paper d3 is attached to the glued portion of b4 and then heated and pressed to form a strip-shaped double-faced corrugated cardboard web. The two-stage single facers III1 and III2
It has two transport paths for transporting the corrugated corrugated paper a4 and b4 of the A-stage and the B-stage formed to the double facer, and one transport path for transporting the front liner paper d3 to the double facer. .

The transport paths are arranged so as to converge toward the entrance of the double facer, and the corrugated corrugated paper sheets a4 and b4 in the A and B stages and the front liner paper d3 are provided in the transport paths. A drive control mechanism (not shown) for adjusting the transport speed so as to reach the double facer at the same timing is additionally provided.

Further, the corrugated corrugated paper a on the above A and B stages
Single-stage glue roll devices 13a and 13b of the double-face portion IVa are arranged on the two transport routes for transporting the b and b4, respectively. Each of these one-stage glue roll devices 13a, 1
3b are respectively arranged immediately after the outlets of the single facers III1 and III2 described above.
Corrugated corrugated paper a and B of A and B formed by III1 and III2
Double face part IV immediately without accumulating 4, b4
While being sent to a, the above single-sided corrugated paper a4, b
It is configured so that gluing is immediately applied to the top of the four corrugated steps.

Further, as described above, the two conveying paths for conveying the corrugated corrugated paper sheets a4 and b4 in the A and B stages and the one conveying path for conveying the front liner paper d3 are the entrances of the double facer. The upper and lower belt pulleys 24a and 24b are provided at the converging portion, that is, at the entrance of the double facer.

The pair of upper and lower belt pulleys 24a and 24b arranged at the entrances of these double facers are connected to the upper belt 1a and the lower belts between the drive pulleys 25a and 25b arranged at the exits of the double facer. The belts 1b are vertically symmetrically arranged so as to overlap each other. Then, the pair of upper and lower belts 1a, 1
b between the corrugated corrugated paper a4 and A,
The b4 and the front liner paper d3 are drawn so as to overlap each other, and are sandwiched by the upper and lower belts 1a and 1b and conveyed while being stuck together to form a five-layer double-faced corrugated board web.

At this time, the lower belt 1b is supported by a plurality of receiving rolls 27 arranged side by side, and
The upper belt 1a is provided with a plurality of non-crash rolls 26 as a pressing means so as not to crush the corrugated cardboard. Each of these non-crash rolls 26
The fin body, which is provided so as to be adjustable in position in the vertical direction and is radially provided on the outer peripheral portion of the non-crush roll 26, is in contact with the upper belt 1a.
This constitutes a cushioning structure for preventing the pressing force against the upper belt 1a from becoming excessive.

Inside the pair of upper belt pulley 24a and lower belt pulley 24b, the heater H. H
It is built in, and each upper and lower belt 1
Belt heating devices 29a and 29b for heating the respective belts to a predetermined temperature are provided in rows on the surface side of a and 1b. The belt heating devices 29a and 29b are used to raise the temperature of the double-faced corrugated board web to a temperature required for bonding.

Further, the upper and lower belts 1a and 1b are provided near the exit of the double facer where they return.
Belt cleaners 30a, 30b for removing paper dust, glue powder, etc. adhering to the surface of a, 1b for cleaning and drying
Is provided as a cleaning means. These belt cleaners 30a and 30b have a brushing means for the belt surface and an exhaust means, and are configured to perform dust removal and drying.

The transfer passage of the double facer is composed of a plurality of movable guide plates provided separately in the transfer direction. Each of these movable guide plates descends downward during normal operation and is in a retracted state, but at the start of work or when the paper runs out, each movable guide plate rises to form a conveyance path and allow the passage of paper. There is.

On the other hand, as shown in FIGS. 1 and 5, the humidity control portion VIIa arranged behind the double face portion IVa is heated and pressed by the double face portion IVa to be bonded. The receiving roll 27 is provided in order to return the double-faced corrugated board web to the normal temperature and normal humidity state in an early stage so as to be in an equilibrium state. The receiving roll 27 is provided between the plurality of movable guide plates 28 that are provided separately in the transport direction. And a suspension roll 32 are provided so as to sandwich the double-faced corrugated board web from above and below. Further, the movable guide plate 28 is configured to move upward to support the double-faced corrugated cardboard web at the start of work or when the paper runs out, and to retract downward during normal operation.

If the double-faced corrugated board web is sandwiched and conveyed by both rolls in this way, the atmospheric contact area of the double-faced corrugated board web is expanded, and the double-faced corrugated board web is quickly returned to the normal temperature and normal humidity state. That is, the double-faced corrugated fiber web sent out from the double-faced part IVa is brought into the equilibrium state in which the temperature and moisture conditions of the front liner paper d3 and the back liner paper d1 are substantially the same by the humidity control part VIIa, and the double-faced cardboard web is also formed. The entire web is brought into a state of equilibrium which is almost the same as the atmosphere of the apparatus, and thereby the preferable manufacturing conditions are set.

FIG. 6 shows another embodiment of the humidity control section. This is an attempt to more positively control the occurrence of "warpage" in the double-faced corrugated board web, in which the conveyance path is completely covered by the adjustment chamber 33, and the upstream side of the adjustment chamber 33 is Is provided with a regulator 34 for forcibly feeding hot air, cold air or moist air,
Further, an exhaust device 35 is provided on the downstream side of the adjustment chamber 33.

Further, in this apparatus, the non-crush roll 26 is employed as a transport roll in order to prevent the double-faced corrugated board web from being crushed and to homogenize the pressing force.

Next, as shown in FIGS. 1 and 7,
Dividing processing part Va arranged behind the humidity control part VIIa
Is a divided plate-shaped piece (corrugated board sheet) obtained by subjecting the double-faced corrugated board web formed by the double face portion IVa to predetermined processing. That is, in this division processing part Va, the fed double-sided corrugated board web is cut and both ends cut by the rotary shear V1 when changing the material and size (order change), and further slitting and creasing (ruled lines) by the slitter scorer V2. Get in)
Is cut and cut into pieces into a plurality of divided plate-like pieces (corrugated cardboard sheets) by cutting off at V3. The cutoff V3 in the present embodiment employs a double cutoff, which enables simultaneous production of sheets having different cut lengths.

The loading section VIa is for running the split plate pieces (corrugated cardboard sheets) sent from the split processing section Va, loading them in a rod shape, and discharging them as products to the outside of the machine.
In the present embodiment, the conveying speed is set so that the divided plate-shaped pieces sent from the divided processing section Va are not superposed as in the conventional case, and the divided plate-shaped pieces are individually moved apart from each other. ing.

That is, the divided plate-like piece (corrugated cardboard sheet) cut by the above-mentioned division processing part Va is a long corrugated cardboard sheet e1.
And short corrugated cardboard sheet e2, and each sheet is carried into the stacking apparatus VI2 by the high speed conveyors 26, 26 at a speed slightly higher than the production speed. Sheet piles f1 and f2 corresponding to the stacking apparatus VI2 are formed.

As shown in FIG. 8 in particular, the stacking device VI2 has front stoppers 40 and 40 for stopping and dropping the corrugated cardboard sheets e1 and e2 discharged at high speed by the high-speed conveyors 26 and 26, respectively. Provided with each forebore 4
Telescopic conveyors 41, 41 for receiving the corrugated cardboard sheets e1, e2 dropped from 0 are arranged. These telescopic conveyors 41, 41 are provided with corrugated cardboard sheets e1, e2, respectively.
After receiving and temporarily holding it, a few seconds later, frame 4
The ledges 43, 43 are arranged so as to be drawn into the insides of the boxes 2, 42, and receive the corrugated cardboard sheets e1, e2 dropped thereby.

In each of these ledges 43, 43, the sheet piles f1, f2 are carried out and new pallets 44, 44 are introduced, and these pallets are stacked at the stacking positions 46, 4 respectively.
The corrugated cardboard sheets e1 and e2 are temporarily received until they are raised to 6, and when the new pallets 44 and 44 are raised to their proper positions, the ledges 43 and 43 are rotated downward. The corrugated cardboard sheets e1 and e2 that have been held until then are released and dropped onto the new pallets 44 and 44. Also, the above pallets 44, 4
4 is configured to gradually descend in accordance with the production of corrugated cardboard sheets, and is discharged when the sheet piles f1 and f2 are formed.

In the corrugated board manufacturing apparatus according to such an embodiment, the single-faced corrugated cardboard paper formed by the single face portion IIIa is immediately sent to the double face portion IVa without being retained as in the conventional case and is immediately glued. Since it is carried out, “temperature unevenness” and “moisture unevenness” due to long-term retention are eliminated, and the properties of each part of the paper are uniform, and a uniform single-faced corrugated paper with no variations in properties between papers is created. .

Since various processing operations such as heating, water addition, step processing, and gluing in a plurality of single facers are to be performed at the same time, the temperature and moisture of the single-faced corrugated paper sent from each single facer can be controlled. There is no variation, and the production conditions for the single-faced corrugated papers to be laminated are homogenized.

Further, in the double face part IVa, the temperature of the single-faced corrugated paper and the front liner paper is raised, and at the same time, polymerization and
Since the bonding is started, the paste for bonding the double-faced corrugated board web is solidified quickly and uniformly, and the moisture is dissipated uniformly and quickly by the exhaust heat water means.

On the other hand, since the double face portion IVa is provided with a humidity control portion VIIa for balancing the temperature and moisture of the plural layers of double-faced corrugated cardboard webs that are laminated by heating and pressing, a double face portion IVa is attached. The double-sided corrugated board web sent out from the section IVa is brought into the equilibrium state in which the temperature and moisture conditions of the front liner paper d3 and the back liner paper d1 are substantially the same by the humidity control section VIIa, and the entire double-sided corrugated board web is The equilibrium state is set to be almost the same as the atmosphere of the apparatus, and thus the suitable manufacturing conditions are set.

Furthermore, since the divided plate-shaped pieces (corrugated cardboard sheets) sent from the divided processing section Va are separately transferred so as not to overlap each other, the divided plate-shaped pieces (corrugated board sheets) sent from the divided processing section Va (corrugated cardboard sheet). The entire surface of () is exposed to the outside air, and this uniformly dries and radiates heat to prevent unevenness in water content and temperature of the corrugated board sheet.

Further, since the base paper supply unit IXa is constructed independently of other parts, the roll base paper is stored independently and homogeneously without being affected by outside air, and the roll base paper IXa is also stored. The back liner paper, core paper and front liner paper pulled out from the paper are supplied to the single face part while the tension, moisture and temperature conditions are maintained at a substantially constant level. It is supposed to be done.

Further, since the single-face portion IIIa and the double-face portion IVa are housed in the soundproof / heat-insulating chamber which is isolated from the external atmosphere, the manufacturing conditions in the single-face portion IIIa and the double-face portion IVa are maintained well. At the same time, heat dissipation and sound leakage to the outside of the machine are reduced and the working environment is improved.

Further, FIGS. 9, 10 and 11 show a single face portion and a double face portion IVa according to the present invention.
2 illustrates another embodiment of the one-step glue device of FIG. First, FIG.
In the device shown in Fig. 1, steam is used as the heat source as in the conventional case, and the single facers III1 and III2 similar to those described above are used.
Is a two-story building, and a preheat roll 50 for liner and a preheat roll 51 for core are attached to each frame, and the single-stage glue roll devices 13a and 13b are provided immediately after the outlets of the single facers III1 and III2. Are arranged. Further, a core heat roller 52 is provided at the entrance of the upper and lower rolls, and a shower device 53 for moisture adjustment is provided at the site where the back liner paper is introduced. The effect is enhanced and "warpage" is controlled during and after bonding.

On the other hand, the apparatus of the embodiment shown in FIG. 10 also uses steam as a heat source as in the prior art, and the single facers III1 and III2 similar to those described above are provided in two stories and are provided in two stages. The double-faced single-stage glue roll devices 13a, 13b are configured to be capable of reciprocating in the flow direction of the process, and the single-stage glue roll devices 13a, 13b
13b and preheater IV1b are integrated, and this integrated unit is an independent structure.

Furthermore, in the embodiment shown in FIG. 11, the four-stage preheater IV1a is provided before the single facers III1 and III2.
And the preheater IV1b for the front liner paper is integrated with the two-stage glue roll devices 13a and 13b.

According to each of the above-mentioned embodiments, the single-faced corrugated paperboard formed by the single-face portion IIIa is immediately fed to the double-faced portion IVa to form a double-sided corrugated board web having high homogeneity. Further, it is possible to use a paper electric heating device as shown in FIG. 4 in combination with the above-described respective embodiments.

On the other hand, as shown in FIG. 12, in the product control device according to the present invention, first, a pair of upper and lower temperature / moisture sensors 5 are provided near the outlet of the humidity control section VIIa.
4 are arranged so that the temperature and moisture of the back liner paper and the front liner paper of the corrugated board web can be simultaneously detected by the temperature / moisture sensor 54.
A plurality of the temperature / moisture sensors 54 are arranged side by side in the paper width direction, or a pair of upper and lower sensors are moved in the paper width direction for scanning.

The detection signal from the temperature / moisture sensor 54 is input to the controller 55 and subjected to predetermined data processing. Specifically, in response to an excess or deficiency of water, an on / off signal of the shower device and an opening adjustment signal to the water adjustment valve 56 are output from the controller 55, and
With respect to the temperature imbalance, a predetermined temperature command signal is issued from the controller 55 to the temperature controller 57, whereby a guide plate heater at a necessary portion,
The operating states of the heating roll, the belt heating device, the adjuster and the like are appropriately controlled.

Further, the central control panel 58 has a function of collecting and calculating each of the above-mentioned data. For those which can set a combination of set values in advance, the production control device attached to the machine body is used. In conjunction with (not shown), a command signal is issued from the presetting device 59 to control the temperature value and the moisture value at each part.

According to such a product control device, the temperature and the moisture content of the core paper, the front and back liner paper and the double-faced corrugated board web are always maintained in a suitable state in each part, whereby the warp of the double-faced corrugated board sheet is minimized. In addition to this, centralized control is performed to predict warpage due to aging and perform quality control, resulting in extremely high quality corrugated board.

The temperature / moisture sensor 54 is provided on the feed side of the base paper to the single facer, the outlet side, the inlet side of the double facer, or the like, so that the temperature of the core paper, the corrugated cardboard paper, and the front liner paper can be controlled. If it is arranged to measure the water content, more effective quality control becomes possible.

Although the invention made by the present inventor has been specifically described based on the respective embodiments, the present invention is not limited to the respective embodiments and various modifications can be made without departing from the scope of the invention. It goes without saying that there is. For example, the present invention is not limited to the apparatus for manufacturing a 5-layer corrugated board sheet as in the above-described embodiment, and may be similarly applied to a manufacturing apparatus for a corrugated board sheet of 3 layers or other layers. You can

[0081]

As described above, in the corrugated board manufacturing apparatus according to claim 1 of the present invention, the double-faced portion is formed by the single-faced portion by arranging the glued portion immediately after the outlet of the single-faced portion. The single-faced corrugated paper is sent to the double face part without being retained as in the past and is immediately glued to eliminate "temperature unevenness" or "moisture unevenness" due to long-term retention, and to improve the properties of each part. Since a uniform single-faced corrugated board is created, it is possible to satisfactorily prevent the occurrence of "warpage" that was inevitable in the past, and improve the reliability and productivity of corrugated board manufacturing equipment. it can.

According to a second aspect of the present invention, in the corrugated board manufacturing apparatus, the single-face processing unit and the double-face processing unit are arranged in a plurality of stages in the vertical direction, and the single-face processing units and double-face processing units are arranged. It is equipped with a drive control mechanism that conveys a plurality of single-faced corrugated paper and liner paper sent out from the gluing unit of By performing simultaneous and homogeneous treatments, it is possible to eliminate variations in temperature and moisture in the single-faced corrugated paper sent from the glued parts of the single-face part and the double-faced part, and to make the production conditions of the single-faced corrugated papers to be bonded uniform. The effect of claim 1 can be further enhanced since it is configured so as to realize.

Further, in the corrugated board manufacturing apparatus according to the third aspect, the temperature of the single-sided corrugated paper and the front liner paper is raised, and at the same time, polymerization and bonding are started to solidify the glue and moisture which adhere to the double-sided corrugated fiberboard web. Therefore, the effect of claim 1 can be further enhanced.

Furthermore, in the corrugated board manufacturing apparatus according to claim 4, a humidity control section for equilibrating the temperature and moisture of the double-sided corrugated cardboard webs laminated by heating and pressing is attached to the double face section. The temperature and moisture conditions of the double-faced corrugated fiber web fed from the double face part, especially the front liner paper and the back liner paper, are balanced, and the atmosphere conditions of the device are balanced to obtain suitable manufacturing conditions. Therefore, the effect of claim 1 can be further enhanced.

Further, in the corrugated board manufacturing apparatus according to the fifth aspect, the divided plate-shaped pieces sent from the divided processing section are superposed so that the entire surface of the divided plate-shaped pieces sent from the divided processing section is uniformly dried and radiated. Since the divided plate-shaped pieces are separately separated and transferred independently, the effect of claim 1 can be further enhanced.

On the other hand, the corrugated board manufacturing apparatus according to the sixth aspect stores the roll-shaped base paper in a uniform state in the base-paper supply section, and the back liner paper, the core paper and the front liner paper pulled out from the roll-shaped base paper. In order to supply the single face part while maintaining the tension, water content, and temperature conditions of the single face part independently, the base paper supply part is independent of other parts, and in the transport path to the single face part,
Tension control means for keeping the tension of the back liner paper, the core paper and the front liner paper pulled out from the roll-like base paper, and the water content of the back liner paper, the core paper and the front liner paper pulled out from the roll-like base paper. And the humidifying / heating means for setting the temperature to a predetermined condition, the effect of claim 1 can be further enhanced.

Further, the corrugated board manufacturing apparatus according to claim 7 measures the temperature and moisture of the core paper, the front and back liner paper, and the double-faced corrugated web on the single-face portion and the double-face portion, and measures the temperature and moisture value of the double-faced corrugated sheet. The product has a temperature and moisture product control device that controls the temperature and moisture to minimize warpage and predicts the warpage due to aging and controls the quality. Since the configuration is such that it is always maintained in a suitable state, the effect of claim 1 can be further enhanced.

Further, in the corrugated board manufacturing apparatus according to the eighth aspect, by providing a soundproof and heatproof chamber for separating the single face portion and the double face portion, the inside of the single face portion and the double face portion is isolated from the external atmosphere, Since good working conditions are maintained and heat dissipation to the outside of the machine and sound leakage are reduced to improve the working environment, the effect of claim 1 can be further enhanced and the working environment can be improved. It is possible to improve efficiency and productivity.

[Brief description of drawings]

FIG. 1 is an overall side view showing an embodiment of a corrugated board manufacturing apparatus (corrugating machine) according to the present invention.

FIG. 2 is a partially enlarged side view showing a base paper supply unit and a wet end unit of the apparatus shown in FIG.

FIG. 3 is a side view showing the wet end portion shown in FIGS. 1 and 2 in a further enlarged manner.

FIG. 4 is a partially enlarged cross-sectional view showing the configuration of a planar heater.

FIG. 5 is a side view illustrating another embodiment of the humidity control unit.

FIG. 6 is a side view showing still another embodiment of the humidity control section.

FIG. 7 is an explanatory side view showing the division processing section and the stacking section in an enlarged manner.

FIG. 8 is an explanatory side view showing the stacking portion in an enlarged manner.

FIG. 9 is a side view illustrating another embodiment of the single facer.

FIG. 10 is a side view showing still another embodiment of the single facer.

FIG. 11 is a side view showing still another embodiment of the single facer.

FIG. 12 is a block diagram showing an example of a product control device.

FIG. 13 is an overall side view showing an example of a conventional corrugated board manufacturing apparatus (corrugating machine).

FIG. 14 is a partially enlarged side view showing a base paper supply unit of a conventional corrugated board manufacturing apparatus (corrugating machine).

FIG. 15 is a side explanatory view showing a staying state of the single-faced corrugated paper fed from the single facer in the conventional device.

FIG. 16 is an enlarged side view showing a conventional double face portion.

FIG. 17 is a side view showing the conveyance state of the double-faced corrugated board web in the stacking unit of the conventional apparatus.

FIG. 18 is an explanatory diagram showing “temperature unevenness” and “moisture unevenness” in a piece of corrugated paper.

FIG. 19 is an explanatory diagram showing “temperature unevenness” and “moisture unevenness” in the double-faced corrugated board web.

FIG. 20 is an external view illustrating a “warp” state of corrugated paper.

[Explanation of symbols]

 IXa Base paper supply unit Ia Wet end IIa Dry end c1, c2 Core paper d1, d2 Back liner paper d3 Front liner paper a1, a2, b1, b2, b3 Rolled base paper 6 Automatic paper threading device IIIa Single face part IVa Double Face part 7 Tension control device III1, III2 Single facer 19 Paper guide plate 20 Sheet heater 18 Moisture adjusting device 17 Moisture control device 10 Upper roll 11 Lower roll 12a Adhesive roll device 14a Pressure belt a4, b4 Single corrugated paper 13a, 13b Single-stage glue roll device 25a, 25b Drive pulley 1a Upper belt 1b Lower belt 27 Receiving roll 26 Non-crash roll 29a, 29b Belt heating device 30a, 30b Belt cleaner VIIa Humidification part Va Dividing part VIa Loading part VI2 Loading device

Claims (8)

[Claims] 1. A base paper supply unit storing a roll-shaped base paper formed by winding a core paper, a back liner paper and a front liner paper, and a core paper drawn from the roll-shaped base paper of the base paper supply unit. Is formed into a corrugated shape, and the back liner paper drawn out from the roll-shaped raw paper is bonded to the corrugated core paper by gluing to form a single corrugated cardboard paper. Adhesive is applied to the top of the corrugated corrugated corrugated paper, and the front liner paper drawn from the roll base paper is attached to the glued part of the corrugated corrugated paper, and then heated and pressed to form a strip of both sides. The double-faced part that forms the corrugated board web, the split processing part that performs predetermined processing on the double-sided corrugated paper formed by the double-faced part to form a split plate-shaped piece, and the split plate-shaped piece sent from this split processing part Run and stack into bars Then, in a corrugated board manufacturing apparatus consisting of an integrated corrugated board sheet manufacturing line equipped with a stacking section for discharging to the outside of the machine, the single corrugated cardboard paper formed by the single face section is immediately sent to the double face section without stagnation. A corrugated board manufacturing apparatus characterized in that the gluing portion of the double face portion is arranged immediately after the exit portion of the single face portion so as to perform gluing. 2. The single face portion according to claim 1,
In addition to having a processing unit in which a plurality of stacked layers are arranged in the vertical direction, a drive control mechanism for transporting single-faced corrugated paper and liner paper between the processing units is provided at substantially the same speed. Corrugated board manufacturing apparatus characterized in that a plurality of double-faced gluing parts are vertically stacked in correspondence with the processing parts. 3. The double-face part according to claim 1 sandwiches the single-faced corrugated paper and the liner paper sent from each of the single-face part and the double-faced gluing part according to claim 2 while polymerizing them. A pair of upper and lower belts, a belt heating means for heating each of the upper and lower belts to a predetermined temperature, a roll pressing means for elastically pressing the upper and lower belts so as not to crush the single corrugated cardboard paper, and the double-faced corrugated cardboard web. Waste heat water means for absorbing and dissipating heat and moisture in, and belt cleaning means for cleaning the surfaces of the upper and lower belts,
A corrugated board manufacturing apparatus characterized by comprising: 4. The double-face part according to claim 1, wherein a humidity control part for equilibrating the temperature and water content of the double-sided corrugated fiberboard webs laminated by heating and pressurizing is attached. Cardboard manufacturing equipment. 5. The stacking unit according to claim 1 has a conveying speed at which the divided plate-shaped pieces sent from the divided processing section are individually moved so that the divided plate-shaped pieces are separated from each other so as not to overlap each other. Corrugated board manufacturing equipment characterized in that 6. The backing paper supply unit according to claim 1, which has a structure independent of other parts, and which is pulled out from the roll-shaped base paper in the conveyance path toward the single face section. Tension control means that keeps the tension of the core paper and front liner paper substantially constant, and humidification / warming that sets the moisture and temperature of the back liner paper, center core paper and front liner paper pulled out from the roll-shaped base paper as predetermined conditions An apparatus for producing corrugated board, comprising: 7. A sensor provided on the single-face portion and the double-face portion according to claim 1 for measuring the temperature and moisture of the core paper, the front and back liner paper, and the double-faced cardboard web, and a detection signal from the sensor. The temperature and moisture values of the core paper, the front and back liner paper and the double-faced corrugated board web are controlled to minimize the warpage of the double-faced corrugated board sheet and to predict the warpage due to aging to perform quality control. A corrugated board manufacturing apparatus comprising: a product control device having a controller, a presetting device, and a control system having a centralized control panel. 8. A corrugated board manufacturing apparatus comprising a soundproof and heatproof chamber for separating the single-face portion and the double-face portion according to claim 1.