JP2007106054A - Corrugated cardboard manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which reduces the problem that the whole of a plant becomes large, is compact and has a good usability in the apparatus which performs the manufacture of a corrugated cardboard. <P>SOLUTION: A constituting section (α) for forming a single-faced corrugated cardboard is arranged on a first floor, and a constituting section (β) for forming an uncompleted corrugated cardboard is arranged on a second floor deck. A constituting section (γ) for obtaining a completed corrugated cardboard is arranged on a surface which continuously and linearly descends gently from the second floor deck to the first floor. Also, a constituting section (δ) for receiving the product corrugated cardboard and facing it to a next process is arranged on the first floor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an improvement of an apparatus for producing corrugated paper. The improvement of the present invention is that the rational arrangement of the components of the corrugated paper manufacturing apparatus allows the entire plant to be compactly packed and facilitates the work of sending the product corrugated paper to the next process.

The current manufacturing method for corrugated paper is as follows. The product consists of three sheets called “single wall”.
A) A core manufacturing process in which a core sheet is drawn out and continuously formed, and processed into a corrugated shape,
B) A first paste application and gelatinization step in which a raw starch solution is applied to the top of the corrugated core, and the applied first paste is heated to gel a part thereof.
C) A single-sided corrugated paper manufacturing process in which the back liner sheet and the core are continuously bonded together, and the first adhesive is heated to promote gelation and complete adhesion and single-sided cardboard.
D) A raw starch solution is applied to the top of a corrugated sheet of corrugated paper on one side, and the applied second paste is heated with a preheater consisting of a heating roll to partially gel the second paste. Paste application and gelatinization process,
E) Corrugated cardboard forming step of continuously bonding the front liner sheet and single-sided cardboard,
F) Corrugated paper board completion process that completes adhesion by promoting the gelation by continuously contacting the surface liner side of the corrugated paper to the hot platen and heating the second glue. A processing preparation process in which the corrugated cardboard is taken out while being cooled, and is processed such as necessary cutting and stacking.

A corrugated paper sheet composed of five sheets, called “double wall”, is manufactured by stacking and bonding the two single-sided corrugated paper sheets described above and one front liner sheet. In this case, in order to satisfy the mechanical properties required for double-wall corrugated paper, the first single-sided corrugated cardboard uses a corrugated wave called “A flute”, and the second single-sided corrugated cardboard It is common to use what is called a “B flute” in which the corrugated wave is relatively small.

Corrugated paper produced as described above, whether single or double walled, is continuously taken up, usually cut into appropriate lengths, stacked and shipped, but in some cases further printed inline , Subjected to punching and box making.

What is important in the technical issues related to the production of corrugated paper is also the improvement of production efficiency, and the realization of higher line speed is required, and this requirement is not limited. Today, the most manufactured A flute single wall products are being produced at high speeds of up to 400 m / min. The next issue is the quality requirement of the product, which requires less warpage and a beautiful surface.

The inventor has been involved in improving the manufacturing technology of corrugated paper for many years, and during that time, has developed several techniques for promoting line speed and improving the quality of product corrugated paper. The main thing is to reheat low-pressure steam as a heat source when gelling the aqueous dispersion of starch (hereinafter referred to as “raw starch solution”) applied to the top of the core to make a paste. Technology that uses high-temperature dry steam (Patent Document 1, Patent Document 2), and the other is a technology that sprays steam on the core prior to application of raw starch liquid to humidify and heat (Patent Document) 3). A technique for humidifying and heating liner paper (Patent Document 4) is also disclosed.

In these techniques, a device that performs humidification is called a “moisner”, and a device that performs heating (and some humidification) is called a “steamer”. Moisner is an adhesive that makes it easy to process corrugated core paper by applying normal, not too hot water vapor to the corrugated cardboard material in the manufacturing process, primarily to provide moisture. It has a function of preventing rapid and large amounts of moisture from being absorbed into the core. On the other hand, the steamer is mainly intended to cause the heated paste to be heated and gelled by the action of heated slightly high-temperature steam.

A proposal recently made by the inventor is a corrugated board manufacturing technique that eliminates heating by a hot platen that has been conventionally used. The significance of this is that, in the manufacture of cosmetic corrugated cardboard, the generation of surface scratches due to friction with the hot platen can be avoided in principle. (Patent Document 5). The other is that instead of heating with a hot plate, first, curing that measures the penetration of the glue material, and heating that heats the soaked glue material with superheated steam and gelates it (patent) Reference 6).
Japanese Patent Publication No.59-015066 JP 03-065365 JP 04-074181 JP 06-011521 Japanese Patent Application No. 2005-036983 Japanese Patent Application No. 2005-211981

On the other hand, when the corrugated cardboard manufacturing apparatus is viewed from the plant aspect, the apparatus part for performing the corrugated cardboard completion process (F) and the processing preparation process (G) is extremely long in order to enable a high line speed. Become. Taking a typical plant as an example, the above-mentioned array of hot plates has a length of 10 m, and the length of the subsequent cooling canvas needs to be 5 m. If the components necessary for manufacturing the single-sided corrugated paper mentioned above are added to these, the total length of the plant will easily exceed 90 m. The corrugated board manufacturing equipment should be more compact from the standpoint of effectively using narrow land and from the actual problem that the size of the factory building that can be constructed is naturally limited.

The problem that the plant becomes very long is particularly serious in the corrugated paper manufacturing technology proposed by the inventor that eliminates the use of a hot platen (Patent Document 5). In the aspect of performing heating with superheated steam instead of the hot platen (Patent Document 6), the time for holding the unfinished cardboard in the bonded state can be somewhat shorter, and therefore, The device is not so long. Nonetheless, the entire plant is long enough to take some countermeasures.

In some cases, the completed corrugated paper may enter a subsequent processing step in-line. However, since it is easier to carry out the process if the corrugated paper manufacture is separated from the subsequent processing, it is Cut to a standard size, stack the appropriate number of standard items, and place them on a roller conveyor for the box making process. At this time, if the product cardboard is not located near the factory floor, it is inconvenient to operate. Therefore, the steps after the bonding of the single-sided cardboard and the front liner base paper are usually performed on the floor of the plant, and the arrangement of the apparatus in that case is as shown in FIG.

The object of the present invention is to reduce the problem that the entire plant becomes long in the apparatus for manufacturing the corrugated paper by the pasting with the front liner base paper, starting from the manufacture of the single-sided corrugated paper as described above. An object of the present invention is to provide a compact and easy-to-use apparatus that eliminates the need for removing the product corrugated paper.

The apparatus for producing the corrugated paper of the present invention is schematically shown in FIG. 2, and as shown in detail in FIGS. 3 to 4, the first floor (G) and the second floor deck (U) placed thereon, and It consists of the following components:
(B) A component for forming a core base paper into a corrugated core, and continuously bonding the core and the back liner base paper using a paste material to form a single-sided corrugated paper,
(B) A component for continuously bonding single-sided corrugated paper and front liner base paper using paste material to form unfinished corrugated paper,
(C) Heat is applied to the unfinished cardboard paper to completely bond it with the paste material, and (d) the finished cardboard paper is cut, stacked, and directed to the next process. Components for,
The above components (b) and (d) are arranged on the first floor, the components (b) are arranged on the second floor deck, and the components (c) are continuous from the second floor deck to the first floor. It is an apparatus characterized in that it is arranged on a surface that moves downward and linearly.

The corrugated cardboard manufacturing apparatus according to the present invention is divided into a first floor (G) and a second floor deck (U) placed on the first floor by dividing the components of the apparatus vertically or vertically. Compared to the arrangement of these components in series on a plane, significant space savings can be achieved. Work involving replacement of relatively heavy and bulky paper rolls is performed on the first floor, and unfinished corrugated paper is formed on the second floor, but the work to turn this unfinished product into the finished product is from the second floor to the first floor. All configurations are done in a continuous and linear manner, with the height being reduced and the final product corrugated board cut, stacked and transferred to the processing process selected on the first floor. The work can be easily performed as in the case where the portions are arranged in series on one plane.

If the corrugated paper board manufacturing apparatus of the present invention is shown more specifically, each component consists of the following elements. First, the core base paper is formed into a corrugated core, and the core and the back liner base paper are continuously bonded using a paste material to form a single-sided corrugated paper. As shown in
-Means (A2) for feeding out the core raw paper (2),
-A core base paper preheating roll (B2) for preheating the fed core base paper,
A pair of tooth rolls (C) for continuously forming a pre-heated core raw paper to produce a corrugated core;
A first paste supply means (D1) for applying a raw starch solution as a paste to the top of the corrugated core;
-Means (A3) for feeding back liner base paper (3),
-A back liner base paper preheating roll (B3) for preheating the fed back liner base paper, and a continuous lamination of the preheated back liner base paper and the core coated with the first paste, Pressure roll (E) to make single-sided corrugated paper (4),
The one consisting of is preferred.

Next, as shown in FIG. 3, the component part (b) for continuously bonding the single-sided corrugated cardboard and the front liner base paper using paste material to form an unfinished corrugated cardboard is as follows.
Placed on the first floor,
-Means (A1) for feeding out the front liner base paper (1), and
Placed on the second floor deck,
A second glue supply means (D2) for applying the raw starch solution to the corrugated top of the single-sided corrugated paper (4),
-Steamer (L) for heating and heating half-gel by spraying superheated steam on the second paste applied to the top of the single-sided cardboard,
-A front liner base paper preheating roll (B1) for preheating the fed front liner base paper, and a pair of pressure rolls (unfinished corrugated paper) E),
The one consisting of is preferred.

As shown in FIG. 4, the components (c) for applying heat to the unfinished corrugated paper to complete the adhesion by the glue and obtaining the finished corrugated paper are as follows:
-An unfinished corrugated paper (5) is traveled while being held in a bonded state, and during the travel, it is a region for penetrating the second gel material that has been semi-gelled into the core and the front liner, A curing zone (X) having a number of sets of rolls and two canvases (K) running in opposition between them,
-An area for spraying superheated steam on the surface liner side of the unfinished corrugated paper (5) to sufficiently gel the second paste material permeated by the heat to achieve complete adhesion, A heating zone (Y) provided with a number of superheated steam jet nozzles (P) provided under the running unfinished cardboard paper, and an area for cooling and taking up the finished cardboard paper (5C) A cooling zone (Z) having a number of sets of rolls and two canvases (K) running in opposition between them,
It consists of The details of the superheated steam jet nozzle (P) provided in the heating zone (Y) and related devices are disclosed in the above-mentioned Patent Document 6.

As shown in FIG. 4, the components (d) for cutting, stacking and directing the completed corrugated paper to the next process are as follows:
・ Cutter (R) that cuts the completed double-sided corrugated paper (5C) to a fixed size, and ・ Stacker (S) that stacks the cut double-sided corrugated paper
It consists of Further, a roller conveyor is usually provided for transporting the stacked corrugated paper toward the next processing step.

However, in the case where a large number of the same cardboard boxes are manufactured, it is possible to provide a facility for punching the manufactured double-sided cardboard paper in-line into a blank having a predetermined size and shape in place of the cutter and stacker pair. Good. The component (d) of the present invention includes such a modified embodiment.

Since the corrugated board manufacturing apparatus of the present invention eliminates the use of a hot platen, it can also be suitably used for the production of so-called cosmetic cardboard. In that case, one or more devices for performing cosmetic processing on the front liner base paper selected from a flexographic printing device, a gravure printing device, an embossing device (both not shown), etc., as required. Install. These apparatuses can usually be installed adjacent to the front liner base sheet feeding means on the first floor.

Schematic which shows the whole structure of the conventional corrugated paper manufacturing apparatus about the flow of material. BRIEF DESCRIPTION OF THE DRAWINGS The schematic figure which shows the whole structure of the corrugated paper manufacturing apparatus according to this invention also about the flow of material. FIG. 3 is a side view of the apparatus of FIG. 2 showing specific components for the first half of the material flow. FIG. 4 is a side view of the components of FIG. 2, showing specific components for the second half of the material flow following the device of FIG. 3.

Explanation of symbols

1 Front liner base paper 2 Core base paper 3 Back liner base paper 4 Single-sided corrugated paper 5 Unfinished corrugated paper 5C Finished corrugated paper G First floor U Second floor deck A1 Front liner base paper feeding means A2 Core raw paper feeding means A3 Back liner base paper Feeding means B1 Front liner base paper preheating roll B2 Core base paper preheating roll B3 Back liner base paper preheating roll C Tooth profile roll pair D1 First glue supply means D2 Second glue supply means E Crimp roll K Canvas L Steamer P Superheat Steam jet nozzle R Cutter S Stacker X Curing zone Y Heating zone Z Cooling zone

Claims (5)

An apparatus for producing corrugated paper, comprising a first floor (G), a second floor deck (U) placed thereon, and the following components:
(B) A component for forming a core base paper into a corrugated core, and continuously bonding the core and the back liner base paper using a paste material to form a single-sided corrugated paper,
(B) A component for continuously bonding single-sided corrugated paper and front liner base paper using paste material to form unfinished corrugated paper,
(C) Heat is applied to the unfinished cardboard paper to completely bond it with the paste material, and (d) the finished cardboard paper is cut, stacked, and directed to the next process. Components for,
The above components (b) and (d) are arranged on the first floor, the components (b) are arranged on the second floor deck, and the components (c) are continuous from the second floor deck to the first floor. An apparatus characterized by being arranged on a surface that gently and linearly descends. The core core paper (2) is formed into a corrugated core, and the core and back liner base paper (3) are continuously bonded using glue material to form a single-sided corrugated paper (A) But,
-Means (A2) for feeding out the core raw paper (2),
-A core base paper preheating roll (B2) for preheating the fed core base paper,
A pair of tooth rolls (C) for continuously forming a pre-heated core raw paper to produce a corrugated core
A first paste supply means (D1) for applying a raw starch solution as a paste to the top of the corrugated core;
-Means (A3) for feeding back liner base paper (3),
-A back liner base paper preheating roll (B3) for preheating the fed back liner base paper, and a continuous lamination of the preheated back liner base paper and the core coated with the first paste, Pressure roll (E) to make single-sided corrugated paper (4),
The apparatus of claim 1 comprising: A component (b) for continuously bonding the single-sided corrugated paper and the front liner base paper (1) using an adhesive material to form an unfinished corrugated paper,
Arranged on the first floor (G),
-Means (A1) for feeding out the front liner base paper (1), and
Arranged on the second floor deck (U),
A second glue supply means (D2) for applying the raw starch solution to the corrugated top of the single-sided corrugated paper (4),
-Steamer (L) for heating and heating half-gel by spraying superheated steam on the second paste applied to the top of the single-sided cardboard,
-A front liner base paper preheating roll (B1) for preheating the fed front liner base paper, and a pair of pressure rolls (unfinished corrugated paper) by continuously bonding the single side corrugated board and the front liner base paper ( E),
The apparatus of claim 1 comprising: There is a component (c) for applying heat to the unfinished cardboard paper to complete the adhesion with glue and obtaining the finished cardboard paper.
-An unfinished corrugated paper (5) is traveled while being held in a bonded state, and during the travel, it is a region for penetrating the second gel material that has been semi-gelled into the core and the front liner, Curing zone (X) with multiple sets of rolls and two canvases (K) running in opposition between them,
-An area for spraying superheated steam on the surface liner side of the unfinished corrugated paper (5) to sufficiently gel the second paste material permeated by the heat to achieve complete adhesion, A heating zone (Y) having a number of superheated steam nozzles provided under the unfinished corrugated paper traveling; and an area for cooling and taking up the finished corrugated paper (5C) A cooling zone (Z) having a set of rolls and two canvases (K) running in opposition between them,
The apparatus of claim 1 comprising: The components (d) for cutting and stacking the finished corrugated cardboard for the next process
・ Cutter (R) that cuts finished double-sided corrugated paper to a standard size ・ Stacker (S) that stacks cut double-sided corrugated paper
The apparatus of claim 1 comprising:

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