WO1993019932A1

WO1993019932A1 - Method of manufacturing corrugated fibreboard and apparatus for manufacturing same

Info

Publication number: WO1993019932A1
Application number: PCT/JP1993/000383
Authority: WO
Inventors: Yoshimasa Yokoyama
Original assignee: Yokoyama Sankoh Co., Ltd.
Priority date: 1992-03-27
Filing date: 1993-03-29
Publication date: 1993-10-14
Also published as: TW265301B

Abstract

This invention relates to a method of manufacturing corrugated fibreboard and an apparatus for manufacturing the same including the continuous, smooth formation of inclined corrugations on a web-shaped corrugating medium, and is characterized by including such a process that a corrugating medium having a predetermined width is continuously delivered, and inserted between a pair of corrugated rolls formed with corrugation-forming teeth in the axial direction in a state of forming an insertion angle of 15-84° sideways from a meshing line of the above-described corrugated rolls, so as to manufacture a corrugated medium having corrugations inclined to the widthwise direction. The manufacture can be carried out such that, instead of inserting the web-shaped corrugating medium between the corrugated rolls, the web-shaped corrugating medium is cut at intervals of a predetermined width to manufacture a medium piece being parallelogram-shaped and having a predetermined size, and this medium piece is inserted between a pair of corrugation-forming machines each formed with corrugation-forming teeth which are straight-lined and in parallel to each other in a state in which a side of the above-described medium piece forms an insertion angle of 15-84° sideways from corrugation-forming teeth of the above-described corrugation-forming machines.

Description

Specification

TECHNICAL FIELD The present invention relates to a method for manufacturing a step ball and an apparatus for manufacturing a step ball.

The present invention generally relates to a cardboard manufacturing method and a cardboard manufacturing apparatus.

More specifically, the present invention relates to a method for producing a corrugated cardboard having a step inclined on a core base paper, and a single-sided cardboard having a step inclined with respect to the width direction, and a step between the laminated stepped cores. The present invention relates to a method and an apparatus for producing a double-faced double-faced cardboard in a crossed state. Background art

Since ordinary corrugated cardboard has a stepped core formed along the width direction, the compressive strength against vertical load in the width direction is large, but the compressive strength against vertical load in the length direction is extremely high. small. Therefore, a cardboard box using such cardboard has a large difference in the compressive strength to the vertical load on each of the bottom surface and top surface, both length surfaces, and both width surfaces. When stacking boxes, it is not possible to stack vertically (stacking with the width side up and down) or side by side (stacking with the length side up and down).

In order to solve such a problem, a method of manufacturing a corrugated cardboard having a step oblique to the width direction has been proposed.

A method and an apparatus for manufacturing a corrugated cardboard having an oblique step include, for example, an invention described in Japanese Patent Application Laid-Open No. 54-76393.

In the corrugated cardboard manufacturing method and apparatus described in the above publication, the corrugated teeth of a pair of corrugated rolls are formed in a spiral shape (helical shape). Then, the core base paper is sandwiched between the step rolls while forming an insertion angle inclined sideways with respect to the line of connection of the step roll, and the core base paper with respect to the connection line of the step roll is formed. By adjusting the insertion angle of the step roll, the stepped core unwound from the step roll is caused to travel in a direction perpendicular to the line of connection of the step roll. Further, in the conventional method and apparatus for manufacturing corrugated cardboard, when the transport direction of the manufactured single-faced corrugated cardboard is changed to the opposite direction, the curvature is changed so that the direction of the formed corrugated cardboard can be ignored ignoring the direction of the formed corrugated cardboard. Uses a large arc guide.

When the oblique step is formed on the core base paper, the core base paper shrinks in the width direction and the length direction, but the above-described conventional method and apparatus for manufacturing corrugated cardboard having oblique steps have the following disadvantages. is there.

One of the drawbacks is that, because the corrugated teeth of the corrugated roll are formed helically, if the corrugated core paper is sandwiched between both rotating corrugated rolls, the corrugated core paper will be The sandwiched portion contracts at a stretch along the joining line of the step roll. This sudden shrinkage breaks the part of the core paper that is sandwiched by the step rolls, making it impossible or extremely difficult to form the steps.

Another drawback is that the precise formation of the helicopter stepped teeth is much more expensive than the ordinary stepped teeth formed with the stepped teeth parallel to the roll axis. Because the manufacturing equipment is expensive.

An object of the present invention is to provide a method of manufacturing a corrugated cardboard, which can form a step inclined in the width direction of a core base paper more smoothly and at a lower cost. It is another object of the present invention to provide a cardboard manufacturing method and a cardboard manufacturing method capable of manufacturing a single-sided cardboard having a diagonal step and a double-sided cardboard more smoothly and inexpensively. Disclosure of the invention

One of the methods for manufacturing a step pole according to the present invention is as follows. In order to achieve the above-described object, a pair of stepped teeth formed along the axial direction while continuously feeding out a constant-width base core paper. Between the corrugated rolls, 15 to 84 laterally to the joint line of the corrugated roll. By inserting the core base paper in a state where the insertion angle is formed, a stepped core having a step inclined with respect to the width direction is manufactured.

When the stepped core is manufactured as described above, when the core base paper is successively sandwiched between a pair of step rolls, the core base paper does not shrink at a portion along the joining line of the rain step roll, and firstly the rain step is performed. It gradually shrinks from the side in the width direction sandwiched by the mouth to the other side. According to Thus, the oblique step is smoothly formed on the core base paper without breaking the core base paper.

The insertion angle of the core base paper with respect to the joining line of both rolls is selected based on the inclination angle of the step of the stepped core to be manufactured.

However, when an inclined step is formed on the core base paper, the core base paper shrinks not only in the length direction but also in the width direction, so the insertion angle of the core base paper with respect to the joint line of the step roll is produced. The angle of inclination of the stepped core does not match, and the latter is smaller than the former. The difference between the two depends mainly on the size of the steps to be formed (A, B, C and E).

In the corrugated cardboard manufacturing method described above, it is preferable to control the posture of the core base paper so that the insertion angle initially set does not change immediately before the core base paper is sandwiched between the corrugated rolls. The reason is that, when the core base paper is continuously inserted into the corresponding step roll in a state where the insertion angle is inclined in the horizontal direction with respect to the joining line of the step roll, the core base paper is This is due to the fact that it is easy to move in the direction perpendicular to the joint line.

While the stepped core manufactured as described above is continuously transferred while the step of the stepped core is parallel to the step roll, the stepped core is continuously transferred to the step top on one surface of the stepped core. A single-sided stepped ball having an oblique step is manufactured by continuously laminating the liner to the stepped core of the stepped core.

In the process of gluing the stepped core and attaching the liner to the top of the stepped core during the transfer of the stepped core, the pitch is lower than the stepped tooth at the pitch of the stepped tooth of the forming port. It is preferable that the transfer is performed in a state in which the step of the one surface of the stepped core is inserted between the guide teeth by a rider roll formed with length guide teeth.

In addition, one single-faced cardboard manufactured by the above-described method is continuously sent out from one side with the top facing upward, and the one-sided cardboard is bent downward while bending the single-sided cardboard along the direction of the step. In the middle of this direction change step or after the direction change, the direction is continuously glued to the top of the one-sided corrugated cardboard, and the other one side manufactured by the method described above. The other single-sided corrugated cardboard is continuously fed from the other while the corrugated cardboard is upwardly directed and the single-sided corrugated cardboard is inclined in the opposite direction with respect to the one single-sided corrugated cardboard. One side When the tops of both single-sided cardboards are successively adhered to each other by successively overlapping the lower surface of the cardboard, a double-sided corrugated cardboard in which the steps of the joined stepped cores intersect at a predetermined angle is manufactured.

According to another one of the methods for manufacturing a cardboard according to the present invention, a step of manufacturing a parallelogram-shaped core piece of a constant size by pressing a core paper having a constant width at a constant interval; The core piece is placed between a pair of step forming machines in which the step forming teeth are formed in parallel with each other in a straight line, and the side of the core piece is lateral to the step forming teeth of the step forming machine. A step of manufacturing a stepped core having a step inclined with respect to the width direction of the core piece by sandwiching the core piece so as to form an insertion angle of about 84 °. You.

When the stepped core is manufactured in this way, when the core piece is successively sandwiched between a pair of step rolls, the core piece does not shrink at a portion along the step forming teeth of the step forming machine, and is first formed by the step forming machine. It gradually shrinks from the side in the width direction to the other side. Therefore, the oblique step is smoothly formed on the side of the core without breaking the core piece.

The insertion angle of the core base paper into the step forming teeth of the step forming machine is selected based on the oblique angle of the step of the stepped core to be manufactured.

However, the insertion angle of one side in the width direction of the core piece with respect to the step forming teeth of the step forming machine does not match the inclination angle of the step with respect to the width direction of the stepped core to be manufactured. Is smaller. The difference between the two depends mainly on the size of the steps to be formed (A, B, C and E).

One diagonal of the core piece is formed at an acute angle, and the core piece is sandwiched between the pair of step forming machines from one acute angle portion, and the insertion angle and the acute angle at the time of this sandwiching are formed. With appropriate choices, a square stepped core is produced.

Preferably, the step forming machine is a pair of step rolls.

One of the pair of step forming machines is constituted by a rotatable step forming tool, and the other of the pair of step forming machines is formed with a step forming tooth of the step roll on a forming surface facing the step forming rule. It is constituted by a rack-shaped molding table having parallel step molding teeth, and a jia core piece is sucked and held on the molding surface of the molding table. With the core piece sandwiched, move the forming table or step roll in the direction orthogonal to the step forming teeth. By moving the stepped core, a stepped core having a step inclined with respect to the width direction can be manufactured.

Further, one of the pair of step forming machines is constituted by a forming table having a forming surface in which step forming teeth are formed in a rack shape, and the other of the pair of step forming machines has, at one end, a step forming tooth of the forming table. And a plurality of cam pieces including a plurality of cam pieces closely arranged in a state where the stepped teeth face the molding surface of the molding table. The core piece is sucked and held on the molding surface of the molding table, and each of the cam pieces is sequentially inserted from one end of the force piece in the parallel direction to the other end between the step molding teeth of the molding table. According to this, a stepped core having a step inclined in the width direction can be manufactured.

While transferring the stepped core having the oblique step as described above to the core piece, it is continuously glued to the top of one side of the stepped core and cut into the same size as the stepped core. When the liner is transferred on the one surface side of the stepped core in synchronization with the stepped core, and is pasted on the one surface of the stepped core, the liner is a single-sided step having a square planar shape. A ball is manufactured.

In order to achieve the above-mentioned object, a corrugated cardboard manufacturing apparatus according to the present invention comprises: an upper and lower step-portion having step-forming teeth parallel to an axis; A rider roll that is installed so as to be parallel and has guide teeth with the same pitch as the step forming teeth of the step roll and a shorter tooth height than the step forming teeth, gluing including an apriquet overnight roll set along the rider roll An apparatus, and a press roll provided along the rider roll behind the apricot overnight roll in the rotation direction of the rider roll, and a press roll provided between the upper and lower step rolls. (4) The core base paper is configured to be continuously inserted at an insertion angle inclined sideways with respect to the joint line.

This corrugated cardboard manufacturing apparatus is a single facer for producing a single-sided corrugated cardboard having an oblique step. When the stepped core unwound by a corrugated roll is bent at each portion, the corrugated core step is performed. Bend smoothly along. Therefore, the single-sided corrugated cardboard having the oblique corrugation can be produced smoothly and continuously, without breaking the core base paper as in the above-mentioned method for producing corrugated cardboard. In this corrugated cardboard manufacturing apparatus, the stepped core having the step formed on the rE core base paper passes through the lower step opening and the Itf rider roll until it is sandwiched between the rider roll and the press roll. It is preferable to provide a posture control means for urging the stepped center along the oblique direction of the insertion angle. The reason for this is that if the core base paper is continuously inserted into the step with the insertion angle inclined in the horizontal direction with respect to the step, the core base paper will This is because it is easy to move in a direction perpendicular to the step forming roll in the portion that is controlled from the roll.

By providing two single facers configured as described above and installing these single facers under the following conditions, a corrugated cardboard manufacturing device consisting of double facers for manufacturing double-sided corrugated cardboard can be configured. Can be.

That is, the first is that the single facers are separated from each other so that the single-faced corrugated cardboard manufactured by each single facer is continuously fed out to the same area with the molding directions of the steps reversed. The second is that the single-faced corrugated cardboard sent out from each single feather is moved up and down in the opposing area of both single facers. This means that they are arranged in such a way that they form a predetermined opening angle when viewed from above so that they overlap and intersect at a distance from each other.

Third, between the two single-sided cardboards at the intersection of the two single-sided cardboards, the feed direction of the single-sided cardboard is reversed along the step of one of the single-sided cardboards sent out to an upper position; and This is to install a rider roll for changing the direction in which the one-sided cardboard ball is superimposed on the other one-sided cardboard card which is sent out to the lower position.

Fourthly, a gluing device including an apricot roll along the rider roll is provided near the direction changing rider roll at a position that does not interfere with the other single-sided step ball.

Fifth, a press roll is provided along the rider roll below the direction changing rider roll.

The press roll transfers the double-sided corrugated cardboard over the lid roll. It can be implemented even if it is installed at the rear position in the feeding direction.

According to the corrugated cardboard manufacturing apparatus, a double-sided corrugated cardboard having oblique steps crossing each other is continuously and smoothly manufactured.

In order to achieve the above-mentioned object, another corrugated cardboard manufacturing apparatus according to the present invention comprises: a stepped upper and a lower step having step forming teeth parallel to an axis; It is installed so as to be separated and parallel, and has a lower pitch than the step-forming teeth at the same pitch as the step-forming teeth of the step-forming teeth, a rider roll having guide teeth, and a lower portion thereof along the lid-viewing teeth. A gluing device including an applicator roll installed at a position above, and a press roll installed at a position rearward in the unwinding direction of the rider roll. The core base paper is configured to be continuously inserted at an insertion angle inclined sideways with respect to the joint line of the core.

This corrugated cardboard manufacturing apparatus is a single facer for manufacturing a single-sided corrugated ball having a diagonal step, and is capable of producing a single-sided corrugated cardboard having a diagonal step smoothly and continuously without breaking the core base paper. Can be.

Providing two single-facers configured in this way and installing these single-facers under the following conditions enables the manufacture of cardboard made of double facers for manufacturing double-sided corrugated balls. The device can be configured.

That is, the first is that each single facer is placed in the same area with the single-sided stepped balls manufactured by the respective single facers in a state where the molding directions of the steps are reversed. It is to be installed opposite to a distant position so that it can be sent out continuously.

The second is that the corrugated rolls of the two single-fusers cross each other so that the single-faced corrugated cardboard delivered from each single-facer overlaps in a facing area of the two single-fusers while being vertically separated from each other. This means that they are arranged so as to form a predetermined opening angle when viewed from above.

Thirdly, between the two single-sided cardboards at the intersection of the two single-sided cardboards, the feed direction of the single-sided cardboard is reversed along the step of one of the single-sided cardboards sent to the upper position, and Installing a lider roll for changing the direction in which the one single-sided cardboard is superimposed on the other single-sided cardboard sent out to a lower position; It is.

Fourth, a trie attaching device including an applicator roll along the rider roll is installed in the vicinity of the direction changing rider roll so as not to interfere with the other one-sided step roll. That is.

Fifth, a press roll is provided below the direction changing rider roll along the rider roll.

The press roll may be installed at a position rearward of the rider roll in the transfer direction of the two-sided corrugated cardboard stacked.

According to this double facer, since the single-sided corrugated cardboard is bent along the corrugated portion at the portion where the single-sided corrugated cardboard is bent, it is possible to smoothly and continuously produce a double-sided corrugated pole having crossed steps.

In each of the above-mentioned double-fusers, the opening angle between the axis of the step rolls in both single-facers is symmetrical to the mutual inclination angle in the width direction of the single-faced corrugated cardboard sent out from both single-facers. It is preferable to set as follows.

According to another embodiment of the present invention, there is provided a corrugated cardboard manufacturing apparatus comprising: an upper and a lower corrugated roll having corrugated teeth formed in parallel with an axis; It is installed in parallel with the step roll, and has a lower tooth height than the step forming teeth at the same pitch as the step forming teeth of the step roll, a rider roll having guide teeth, and is installed below the rider roll along the rider roll. A gluing device including a roll of apricot roll, a transfer device installed in the unwinding direction of the lidar roll, and a press roll installed facing the end of the transfer device, between the upper and lower step rolls. The core piece having a predetermined length cut into a parallelogram is sandwiched in such a state that one side in the width direction of the core piece forms an insertion angle inclined sideways with respect to the joining line of the step roll. Mikomi It is configured to be.

This corrugated cardboard manufacturing apparatus is a single facer for manufacturing single-sided corrugated cardboard, and has a diagonal corrugated shape and is capable of smoothly producing single-sided corrugated cardboard in a plane.

In each of the above-mentioned corrugated ball manufacturing equipment, a preheating unit, a so-called wet unit, cooling unit, and other necessary equipment are installed at appropriate positions, as in the ordinary corrugated cardboard manufacturing equipment. Is preferred. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view of a corrugating apparatus for explaining an example of a method for producing corrugated cardboard according to the present invention.

FIG. 2 is a plan view of a main part showing an embodiment of a cardboard manufacturing apparatus according to the present invention.

Fig. 3 is a partial side view of the device of Fig. 2 viewed from the direction of arrow A-A. Fig. 4 is a portion of the device of Fig. 2 viewed from the direction of arrow C. It is a front view. Fig. 5 is a partial side view of the device shown in Fig. 2 viewed from the direction of arrows B-B. Fig. 6 is a view of the lidar roll, lower roll, and apriquet opening of the device shown in Fig. 2. FIG. 4 is a partially enlarged view showing a relationship between the first socket and the pressurizing socket.

FIG. 7 is a partial perspective view of a double-sided cardboard manufactured by the manufacturing apparatus of FIG.

FIG. 8 is a partial cross-sectional view of a double-sided corrugated cardboard when the pressure is increased when two single-sided corrugated boards are bonded together in the manufacturing apparatus of FIG.

FIG. 9 is a plan view of a main part showing another embodiment of the cardboard manufacturing apparatus according to the present invention.

FIG. 10 is a partial side view of the apparatus of FIG. 9 when viewed from the direction of arrows D-D.

FIG. 11 is a plan view of a main part showing still another embodiment of the cardboard manufacturing apparatus according to the present invention.

FIG. 12 is an enlarged side view of a main part of the manufacturing apparatus of FIG.

FIG. 13 is a plan view of a corrugating apparatus for explaining another embodiment of the method for producing a corrugated cardboard according to the present invention.

FIG. 14 is a plan view of a main part showing still another embodiment of the cardboard manufacturing apparatus according to the present invention. FIG. 15 is a partial plan view for explaining a method of manufacturing the core piece in the embodiment of the method of manufacturing a cardboard according to the present invention.

FIG. 16 is a partial cross-sectional view of the manufacturing apparatus of FIG. 15 along a line EE. FIG. 17 is a side sectional view showing a main part of a corrugating apparatus for explaining still another embodiment of the method for producing corrugated cardboard according to the present invention.

FIG. 18 is a bottom view showing the relationship between the forming table and the step rolls in the step forming apparatus of FIG.

FIG. 19 is a bottom view showing a main part of a corrugating apparatus for explaining still another embodiment of the method for producing corrugated cardboard according to the present invention.

FIG. 20 is a bottom view showing a main part of a corrugating apparatus for explaining still another embodiment of the method for producing corrugated cardboard according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

First, in the method for manufacturing corrugated cardboard according to the present invention, an embodiment for continuously forming an oblique step on a band-shaped core base paper fed from a mill roll stand will be described.

Reference numeral 20 in FIG. 1 denotes a pair of upper and lower step rolls having a heating means (not shown), and reference numeral 13 denotes a posture control means comprising a conveyor having a suction function. Each of the pair of step rolls 20 has step forming teeth (not shown) parallel to the axis.

The belt-shaped core base paper 1 unwound from a mill roll stand (not shown) is controlled by the posture control means 13 so as to move straight, while being approximately 7 laterally to the joining line 21 of the step roll 20. sandwiched to corrugating roll 2 0 to form an insertion angle theta 1 of 4 ^0.

The core paper 1 sandwiched between the step rolls 20 is inclined by about 65 ° in the length direction (25 ° in the width direction) Θ 2 (or the feeding angle) by the step rolls 20. ) Are continuously formed and fed out while continuously forming the stepped core 10.

The core base paper 1 is collected in the length direction when the step 11 is formed by the step roll 20. It shrinks as well as in the width direction.

Since the core paper 1 is sandwiched from the oblique direction with respect to the step roll 20, when the core paper 1 contracts in the width direction, the core paper 1 is sequentially inserted from the side where the insertion angle 01 is formed on the other side. It contracts in the direction of the side (in the figure, in order from the lower part to the upper part).

Due to the shrinkage of the core base paper 1 in the width direction during the step forming, the stepped core 10 fed from the step roll 2 moves from the position of the joint line 21 of the step roll 20 to the insertion angle 0 1. It is fed out with a further 9 ° turn. As a result, the inclination angle 02 of the step 11 with respect to the length direction of the stepped core 10 is about 65 ° (74 ° -9) as described above.

The shrinkage ratio from the width w l of the core base paper 1 to the width w 2 of the stepped core 10 by the molding of the step 11 is 65 at an inclination angle of 0 2 with respect to the length direction. A core (number of stages per 300 rows 3 4 ± 2, step pitch length 8.3 3 3 to 9.3 7 5 鯽, step height 4.5 to 4.8 鯽) When manufacturing 0, it is about 5%.

The difference between the insertion angle θ1 and the inclination angle Θ2, the shrinkage from the radiation w1 of the core base paper 1 to the width w2 of the stepped core 10 due to the molding of the step 11 It differs depending on the size (one of A-stage, B-stage, C-stage, and E-stage, or the difference in repetition rate), and the inclination angle 0 2 of the stage 11 to be molded. I can do it.

By the way, when manufacturing the core base paper 10 in which the column 11 is the A stage and the inclination angle 0 2 with respect to the length direction is 2 45 °, the insertion angle 0 1 is more than 58 ° and the width of the core base paper 1 The shrinkage from w1 to the width w2 of the stepped core 10 is 14 to 15%. The shrinkage ratio of the base paper width due to the molding of step 11 is inversely proportional to the insertion angle 0 1 of the core base paper 1 with respect to the step roll 20, and the contraction rate of the base paper length is 6> 1 It is proportional to the size.

According to the cardboard manufacturing method of this embodiment, when the core base paper 1 contracts in the width direction, it contracts sequentially from the side where the insertion angle 01 is formed toward the other side. Thus, the stepped core 10 having the oblique step 11 is produced smoothly and continuously without breaking the core base paper 1.

In the case of manufacturing corrugated cardboard by the method of this embodiment, the portion joined by the corrugated rolls 20 of the core base paper 1 tends to be perpendicular to the joining line 21 of the corrugated rolls 20. In this case, the attitude control means 13 is preferably configured to urge the core base paper 1 in the direction opposite to the arrow a, since it may move in the direction of arrow a in FIG. . Next, an embodiment of a cardboard manufacturing method and a manufacturing apparatus using the above-described step forming method will be described with reference to FIG. 2 to FIG.

The corrugated board manufacturing apparatus shown in Figs. 2 to 6 is a double facer equipped with two single facers.

As shown in FIG. 2, each single facer 2, 2 a is a single-faced cardboard 1 2, 12 a manufactured by each single facer 2, 2 a, and They are installed opposite to each other at a distance so that they can be continuously fed into the same area with the molding directions reversed.

As shown in FIGS. 3 and 5, the single facer 2, 2a is composed of upper and lower step rolls 2, 2, 3 having step forming teeth 24 (FIG. 6) parallel to the axis, and a lower step. A rider roll 3 that is engaged with the corresponding step roll 23 below the roll 23, a gluing device 4 including an application roll 40 installed along the rider roll 3, and the application roll 40. The press rolls 5 installed along the rider roll 3 are provided behind the rider roll 3 in the rotation direction.

Each of the upper and lower step rolls 2 2, 2 3 and the rider roll 3 is provided with a not shown, a freshening step, and a relatively low level in the axial direction, and a sucking ί means for sucking by force. ing. As shown in FIG. 6, guide teeth 30 having the same pitch as the step forming teeth 24 of the lower step roll 23 are formed on the rider roll 3 and have a lower height than the step forming teeth 24.

Although the rider roll 3 in this embodiment is engaged with the lower stage roll 23 as described above, the rider roll 3 may be separated from the lower stage roll 23 without being engaged therewith.

The gluing device 4 includes the apricot roll 40, glue pan 42, doctor roll 41, and the like.

The axial centers of the corrugated rolls 22 and 22 of the two single facers 2 and 2a are arranged so that the single-sided corrugated cardboards 12 and 12a sent from the respective single rollers 2 and 2a are: A predetermined opening angle 03 is formed when viewed from above so that the two single-fusers 2 and 2a overlap and cross each other in an opposing area in a vertically separated state.

In the corrugated board manufacturing apparatus of this embodiment, the insertion angle 01 of the core base paper 1 with respect to the combined line of the corrugated rolls 22 and 23 in each single facer 2 and 2a is about 74 °, and The opening angle of the shaft center 03 is 50. Designed back and forth.

The core base papers 1 and 1a of the same width wl, which are driven from a mill roll stand (not shown) of both single facers 2 and 2a, are respectively controlled by the attitude control means 13 and 13 to form upper and lower step rolls. It is transported so as to go straight between 22, 23, and 74 for the upper and lower rolls 22, 23. Is inserted continuously at an insertion angle of 01. In this way, by rotating the upper and lower step rolls 22, 23, the steps 11, 1, 1a (step A) having an inclination angle 02 of about 65 ° with respect to the length direction are formed. The cores 10 and 10a are manufactured continuously.

Each of the stepped cores 10 and 10a fed out as described above is driven by a finger (not shown) so as to follow the rotation direction of each of the lower step rolls 23 and 23 and the rider rolls 3 and 3, respectively. It is guided to run in a character shape.

As described above, when the stepped cores 10 and 108 are run in a three-character shape by the rolls 23 and 3, the stepped cores 10 and 10 a and the core base papers 1 and 1 a The force that moves in the direction opposite to arrow b in FIG. 2 is likely to act. Therefore, each lower step roll 23, 23 and each rider roll 3, 3 are provided with attitude control means 25, 31 on the side where the stepped core 10, 10a is fed out, respectively. The posture control means 25, 31 at all times constantly urges the stepped cores 10, 10a running in an S-shape with an appropriate force in the direction of the arrow b in FIGS. 2 and 4. are doing.

As shown in FIGS. 3 and 4, each of the attitude control means 25 of this embodiment is constituted by a rubber or elastic synthetic resin belt 34 attached to a pair of burries 32, 33 under tension. ing. The belt 34 is inclined downward in the direction of arrow b as shown in FIG. 4 and slightly presses each stepped core 10 against the surface of the lower step roll 23. By rotating counterclockwise in FIG. 2 and clockwise in FIG. 5, the stepped core 10 is urged in the direction of arrow b.

The other attitude control means 31, 3 1 are also composed of rubber belts and burries. I have.

The above-mentioned attitude control means 25, 31 may be constituted by a rubber roller or a roller of a flexible synthetic resin instead of the above-mentioned constitution.

One of the tops of the stepped cores 10 and 10a, which are guided so as to travel downward in an S-shape, is continuously glued by respective apricot rolls 40 and 40, respectively. At this time, since the guide teeth 30 of the rider roll 3 are formed to have a low tooth height as shown in FIG. 6, the glue does not adhere to the guide teeth 30.

On the other hand, mill roll stands (not shown) are provided below the respective gluing devices 4. From these mill roll stands, stepped cores 10 and 10 a are provided via tension rolls 53. The liners 14 and 14a having the same width as the above are driven in synchronization with the transfer speed of the stepped cores 10 and 10a. These liners 14, 14 a are sequentially pasted on the stepped cores 10, 10 a to which the stepped cores 10, 10 a are glued by the press roll 5, and the single-sided cardboards 12, 12 a are continuously formed. Manufactured.

The single-sided cardboards 12 and 12a manufactured in this manner are transferred horizontally by the respective transfer devices 51 and 52 with the steps 11 and 11a facing upward. In a state where 12 is located above the other single-sided cardboard 12a, it reaches the intersection c between the two. At this time, the steps 11 and 11a of the single-sided cardboards 12 and 12 are mutually inclined in the opposite direction.

Between the two single-sided cardboards 12 and 12a at the intersection portion c, a lider roll 6 for direction change is installed along the step 11 of the upper single-sided cardboard 12 and the upper single-sided cardboard The transfer direction of the cardboard 12 is changed by the rider roll 6 along the step 11 in the reverse direction. The one-sided corrugated cardboard 12 after the direction change has a posture in which the corrugated cardboard 11 overlaps the other single-sided corrugated cardboard 12a in a state where the corrugated cardboard 11 faces and intersects with the corrugated cardboard 11a of the other one-side corrugated cardboard 12a.

In the vicinity of the direction-changing rider roll 6, the applicator roll 61, the doctor roll 62, and the glue pan 63 along the rider roll 6 are positioned so as not to interfere with the single-sided cardboard 12 a passing below. A gluing device 60 is installed. Therefore, the one-sided corrugated cardboard 12 is sequentially glued to the corrugated top by the T-Apriquet overnight roll 61 while the direction of the corrugated cardboard 12 is changed. This one side cardboard 12 is sequentially stacked on the lower single-sided corrugated cardboard 12a by the change of direction, and is attached to the lower single-sided corrugated ball 12a by the press roll 50 and the heating part 54 installed at the rear. By being combined, the double-sided corrugated cardboard 15 is continuously produced.

FIG. 7 is an enlarged view of the double-faced corrugated cardboard 15 manufactured as described above.

In the double-sided corrugated cardboard 15, the stepped cores 10, 11 a of each of the stepped cores 10, 10 3 have an inclination angle of 0 4 and 0 5 with respect to the width direction Wd of 25 °. The crossing angle between steps 11 and 11a in Wd is 50. It is.

This double-sided corrugated cardboard 15 is in a state where a large number of rhombuses or parallelograms formed by the steps 11 and 11a bonded to each other at the intersections of the steps are regularly connected in a mesh form. However, each of the steps 11 and 11a is stuck at a large number of bonding parts in both the width direction Wd and the length direction Ld, and organically cooperates with external force. The compressive strength against the vertical load in the width direction W d and the length direction L d is much larger than that of a normal double-sided stepped ball.

When the single-sided corrugated cardboard 1 2, 1 2a is bonded to each other with a stronger pressure than usual, as shown in Fig. 8, if the tops at the intersection 16 of the steps 11, 11 a are compressed, However, the compressive strength of the cardboard against the vertical load in the width and length directions becomes larger. In such a configuration, the compression ratio (ratio of compression to the height of the step) of the steps 11 and 11a at the intersection 16 is preferably in the range of 5 to 40%. The double-sided corrugated cardboard 15 can be manufactured so that the step 11 of the stepped core 10 and the step 11a of the stepped core 10a have different step sizes, respectively. It can also be manufactured so that the inclination angles 04 and 05 with respect to the direction W d are different. 9 and 10 show a cardboard manufacturing apparatus in which a part of the cardboard manufacturing apparatus shown in FIGS. 2 to 6 is modified.

Each single facer 2, 2a in FIG. 9 is, like the single facer 2, 2a in FIG. 1 Release the 1a so that it is sent out to the same area with the tilt direction reversed. It is installed facing the position where it is located.

The single facer 2 includes upper and lower step rolls 2 2, 2 and 3, a rider roll 3 installed at approximately the same level as the upper step roll 2 2 behind the step rolls 2 2 and 23, and a rear of the rider roll 3. The other rider rolls 3 and 5 installed on the rolls, the gluing device 4 including the apricot rolls 40 installed along the lower part of the rider rolls 3, and the press installed along the lower part of the rider rolls 35 With roll 5. Guide teeth (not shown) having a low tooth height are formed on the outer periphery of the rider rolls 3, 35, similarly to the guide teeth 30 of the rider roll 3 in FIG.

The stepped core 10 produced by sandwiching the core base paper 1 between the upper and lower steps 22, 23 at a predetermined insertion angle θ 1 is fed horizontally by the rider roll 3. Meanwhile, glue is successively glued to the lower step by the application roll 40. On the other hand, a liner 14 that is fed from below through a tension roll 53 at a speed synchronized with the stepped core 10 is attached to the lower surface of the stepped core 10 by the press roll 5, Single-sided cardboard 12 is manufactured continuously. This single-sided cardboard 12 is transferred to the intersection c.

The other single facer 2a is also configured substantially in the same manner as the single facer 2, and the single-faced cardboard 12a manufactured by the other single facer 2a intersects with the single-faced cardboard 12 described above. It is transferred to a position below part c.

The upper single-sided cardboard 12 transferred to the intersection c is glued by the applicator overnight roll 61 of the gluing device 60 while the direction is changed by the direction changing rider roll 6. Then, the direction is changed in the opposite direction, and it is successively overlaid on the lower single-sided step ball 12a, and the lower one side is pressed by the press roll 50 and the heating part 54 (FIG. 9) installed at the rear. By being bonded to the corrugated cardboard 12a, the double-sided corrugated cardboard 15 is manufactured continuously.

The composite TO corrugated cardboard 15 thus produced has the same structure as that of FIG. 7 and other components of the corrugated cardboard manufacturing apparatus shown in FIGS. 9 and 10 are shown in FIGS. Since it is the same as the corrugated cardboard manufacturing apparatus of the above, the description of those is omitted. An embodiment of another corrugated cardboard manufacturing apparatus using the corrugating method of FIG. 1 will be described with reference to FIGS. 11 and 12.

Reference numeral 16 is a mill roll, 13 is a posture control means composed of a pair of rolls 13a also serving as heating means, and 22, 23 are step rolls having the same structure as in each of the above-described embodiments. 0

The roll 13a constituting the attitude control means 13 is inclined leftward in the figure at a predetermined inclination angle Θ6 (25) with respect to the width direction of the core paper 1 unwound from the mill roll 16. The step rolls 22 and 23 are inclined in the opposite direction at a predetermined inclination angle Θ1 (25.). It is preferable that the inclination angles 06 and 07 of the roll 13a and the step rolls 22 and 23 can be changed by moving the roll 13a and the rolls 22 and 23. While rotating the corrugated rolls 2 2, 2 3, the core base paper 1 is sandwiched between the corrugated rolls 2 2, 2 3 at a predetermined insertion angle 0 1, and the corrugated rolls 2 2, 2 3 of the core raw paper 1 In some cases, a force to move in the direction of arrow e in FIG. 11 may act on the interlocked portion. In such a case, the roll 13a is applied to the core base paper 1 in advance. The orientation of the core base paper 1 is controlled by giving directionality in the direction of arrow d in FIG.

The band-shaped core base paper 1 wound on the mill roll 16 is fed out at a predetermined speed, and while being given directionality in the direction of the arrow d by the attitude control means 13, is stepped at an insertion angle θ 1 of about 65 °. A stepped core having a diagonal step 11 is sandwiched between rolls 2 and 23 and is continuously manufactured.

The inclination angle 02 of the step 11 with respect to the length direction of the stepped core 10 is about 53 °. As shown in FIG. 12, the stepped core 10 where the diagonal step 11 is continuously formed changes its transport direction along the payout side of the lower step roll 23 as shown in FIG. A glue is applied to one of the tops of the stepped core 10 by an applicator roll 40 installed on the payout side of the lower stepping hole 23, and the stepped core 10 is connected to the stepped core 10 from below. By bonding a liner 14 supplied at a synchronized speed to the stepped core 10 with a press roll 5, a single-faced cardboard 12 having an oblique step 11 is continuously produced. In the same way, while producing another single-sided corrugated board in which the inclination of the corrugated board with respect to the width direction of the core base paper is reversed, each single-sided corrugated board is guided to a double fuser, and both single-sided corrugated boards are produced. By laminating the steps so that their tops cross each other, a double-sided step pole 15 as shown in FIG. 7 can be manufactured continuously.

Another embodiment of the method for manufacturing a cardboard will be described with reference to FIG.

Reference numeral 17 denotes a parallelogram-shaped core piece obtained by cutting a band-shaped core base paper at regular intervals, reference numeral 20 denotes a pair of step-forming rolls having step-forming teeth parallel to the axis, and reference numeral 18 denotes a diagonal to the core piece 17. This is a core base paper obtained by molding step 11 of No. 1. In this embodiment, a pair of step rolls 20 constitute a step forming machine 27.

As shown in Fig. 15, the core piece 17 is obtained by cutting out the band-shaped core base paper 1 from the mill roll 16 and cutting the same at a predetermined inclination angle 08 at a predetermined inclination angle 08 with a cutting edge 1b. .

The manufacturing method according to this embodiment is as follows. The core pieces 17 of the parallelograms A 1, B 1, C 1, and D 1 are moved from the acute angle A 1 to the joining line 21 of the step roll 20. 1 7 A side A 1—D 1 is inserted into the step rule 20 in a state of forming an insertion angle 0 1 and a step having an inclination angle 02 with respect to one side A 2—D 2 This is a method for producing stepped cores of squares A 2, B 2, C 2, D 2 having 1 1.

The insertion angle 0 1 of the step 11 to be formed with respect to the inclination angle 02 is experimentally determined by the size or step repetition rate of the step 11 to be formed, and the acute angles A 1, C 1 And the obtuse angles Bl, D1 are experimentally determined by the step size or step repetition rate to be molded and the insertion angle 01.

According to experimental results obtained by the inventor, the relationship between the inclination angle 02 of the step 11, the acute angle A 1 of the core piece 17, and the insertion angle 01 in the case of forming the A step is roughly as shown in the following table. It was as follows.

(Θ 2) (A 1) (Θ 1) (Θ 2 (A 1) (Θ 1)

1 0 ° 8 0. 0 ° 16.5 ° 5 0 ° 64.0 ° 62.5

20 ° 72.0 ° 31.0 ° 55 ° 64.5 ° 66.5

25 ° 69.0 ° 37.0 ° 6 0 ° 66.5 ° 70.5

3 0 ° 66.5 ° 43.0 ° 6 5 ° 69.0 ° 74.0

35 ° 64.5 ° 49.0 ° 70 ° 72.0 ° 77.0

4 0 ° 64. 0 ° 53.5 ° 8 0 ° 80.0 ° 83.5

4 5 ° 63.5 ° 58.5 °

The relationship between the inclination angle 02 of the step 11, the acute angle A 1 of the core piece 17, and the insertion angle 01 in the case of forming the B step was as shown in the following table.

(

The numerical values in each of the above tables are average values when a JIS standard A core (average weight 125 g Zm ² soil 5) is used as the core base paper.

From the numerical values in the above table, when the sides A2—B2 and A2—D2 of the stepped core 18 to be manufactured are set to 100, the sides A 1-B 1 and A 1-one of the core side 17 The required length of D 1 can be obtained by the following equations (1) and (2).

Formula (1) · · · A 1— B 1 = Κ · 100 · c 0 s Θ 2 / cos AL Formula (2) ■ · · Al-D 1 = K · 100 · sin Θ 2zo cos AR where K Indicates the step repetition rate. The step repetition rate for the A step is about 1.55 to 1.61, and the step repetition rate for the B step is about 1.35 to 1.4.

The numerical values and the expressions (1) and (2) shown in Tables 1 and 2 are also used when the manufacturing method described in FIG. 1 is performed.

Example of manufacturing a stepped core 18 in which sides A 2-B 2 and sides A 2-D 2 are 1000 mm square and step 11 (A step) has an inclined angle 02 of 70 ° I do.

According to Table 1 above, the acute angle A1 of the center side 17 is set to 72 ° and the obtuse angle B1 is set to 108 °, respectively, and the side A 1−B 1 is calculated by the above equations (1) and (2). 1070mm. Set side A 1—D 1 to about 155 Oram. However, adopted 61. Set the insertion angle of the side A 1—D1 of the core piece 17 to the joining line 21 of the step roll 20 at 77 °, and rotate the step roll 20 to set the center side 17 at one acute angle A 1 Between the roll 20.

When the stepped core 18 is manufactured in this manner, when the core piece 17 shrinks in the direction of the width w3 due to the molding of the step 11, the base paper is first separated from the portion sandwiched between the step rolls 20 by the other. Step 11 is formed smoothly without breaking. With reference to FIGS. 14 and 16, a method and an apparatus (single facer) for producing corrugated cardboard using the above-described corrugating method will be described.

The core pieces 17 have acute angles A 1 and C 1 of about 63.5. The obtuse angles B 1 and D 1 are about 16.5 °, and the width w 3 is 100 O ram.

The core pieces 17 stacked on the gantry 19 in a plane posture as shown in FIG. 14 are picked up one by one by a pick-up means (not shown), and one side A with respect to the step rolls 2 2, 2 3. 1—Supply between the front steps 22 and 23 with the insertion angle 0 1 of D 1 slightly more than 58 degrees, and a step of about 45 degrees with each side inclined at 2 degrees. A square stepped core 18 having 11 (A step) and each side having a length of about 855 mm is manufactured. The stepped core 18 manufactured by the upper and lower step rolls 22 and 23 is sequentially moved downward by the finger 26 along the payout side of the lower step roll 23 and then along the payout side of the rider roll 3 thereunder. Sent in an S-shape. The rider roll 3 forms guide teeth having a slightly smaller tooth height at the same pitch as the step forming teeth of the step rolls 23, and the stepped core 17 is guided in the transfer direction by these guide teeth.

The stepped core 18 that has been transferred downward is glued to the step top below it by an application roll 40 of the gluing device 4 installed below, and the transfer device 4 3 having a suction function , And is horizontally transferred forward in the payout direction.

On the other hand, the liner 14 cut to the same size as the stepped core 18 is stacked on a pedestal 55 installed below, and is picked up one by one by pickup means (not shown). The part is supplied to a transfer device 5a having a suction mechanism 56 and a pinch roll 57.

The liner 14 is transferred between the rider roll 36 and the press roll 5 in synchronization with the stepped core 18 by the transfer device 5a, and is transferred by the rider roll 36 and the press roll 5. The core 18 is sequentially glued to the glued lower surface, Thus, a square single-sided corrugated cardboard 12b having oblique steps 11 is continuously produced.

Reference numeral 4 4 is a sensor for detecting the leading portion of the stepped core 18 to be transferred upward. If the sensor 44 does not detect the stepped core 18 being transferred, the liner 14 Is not supplied between the rider roll 36 and the press roll 5. If the single-sided cardboards 12b are superimposed on each other and their tops are bonded together, a double-sided cardboard will be obtained. With reference to FIGS. 17 and 18, another embodiment including a method for manufacturing a parallelogram-shaped core piece into a stepped core will be described.

The step forming machine 27 in this embodiment includes a forming table 7 having a forming surface 71 on which a number of step forming teeth 72 are formed in a helical shape, and a lower part of the front end of the forming surface 71 of the forming table 7. And a step hole 70 having a step forming tooth 70 a which meshes with the step forming tooth 72 described above.

Below the molding surface 71, a suction conveyer 76, which is located slightly close, is provided.

The molding table 7 is provided with a heating means (not shown) for heating the molding surface 71, and an air flow hole 73 is formed so as to cover almost the entire area of the molding surface 71. . On the one hand, this flow hole 73 communicates with the surface of each step forming tooth 72 by means of a number of small holes 77 located over almost the entire surface of the forming surface 51, and on the other hand, a switching valve not shown It is connected to a vacuum pump and a compressor (not shown) through a connecting pipe 74 provided.

The step roll 70 may be provided with a freshening step (not shown) for heating the surface of the step roll 70.

The molding table 7 is located at the first station 7b with the rear end stationary at the position shown by the dotted line in FIG. 17 before the step molding, and the center piece 17 While keeping the same timing as the movement of, move horizontally to the second station 7c as shown by the two-dot chain line in Fig. 17 and go back and forth to return to the first station 7b again. The core piece 17 cut into a parallelogram is supplied to the suction conveyor 76 along the transfer direction indicated by the arrow 7a by the feed roll 75 serving also as a heating roll, and is supplied to the suction conveyor 76. While being sucked, it is transferred to below the molding surface 71 of the molding table 7 stopped at the first station 7b, and the suction conveyor 76 stops at that position. During this time, the core piece 17 is transported in such a manner that the opposing sides 17a and 17d do not intersect at right angles with the teeth 72 of the molding table 7, as shown in FIG.

When the suction conveyor 76 stops, the suction bow of the conveyor 76 stops. [The function stops, and the communication hole 73 of the molding table 7 communicates with the vacuum pump through the connection vibrator 74, and the core piece on the suction conveyer 76 is stopped. 17 is held by suction on the molding surface 71 of the molding table 7. Simultaneously with the suction holding, the molding table 7 is moved to the second station 7c by the driving device. During this movement, the teeth of the roll 70 and the molding surface are rotated while the step roll 70 rotates at the same position. The teeth 7 2 of 7 1 are successively engaged with each other, so that a step is formed on the core piece 17 held on the forming surface 7 1, and the step 11 is formed at a predetermined angle to the width direction. Stepped core 18 is manufactured.

The flow hole 13 of the molding table 7 moved to the second stage 7c is switched from the vacuum pump to the compressor by a switching valve of a connecting pipe 74, and is communicated by the compressor. The stepped core 18 is separated from the molding surface 71 and falls onto a lower table (not shown) by the air blown out of the step. At the same time, the molding table 7 is returned to the first station 7b by the driving device, and the same operation is repeated thereafter.

A single-sided corrugated cardboard is manufactured by bonding a liner to one side of a stepped core 18 that is manufactured continuously as described above, and pressure bonding is performed so that two single-sided corrugated cardboards 11 intersect each other. Thus, a double-sided corrugated cardboard as shown in FIG. 15 is manufactured.

Synchronizing with the holding of the core piece 17 on the molding surface 7 1 of the molding table 7 at the first station 7 b, the teeth 70 a of the step roll 70 and the teeth 7 2 of the molding surface 7 1 are in contact with each other. It is configured so that it moves in the opposite direction of the transfer direction 7a of the core piece 17 together with the feed roll 75 and the suction conveyer 76 while keeping the same, so that the separation of the core piece 17 from the forming surface 71. It is also possible to carry out the present invention by a configuration in which the forming roll 70, the feed roll 75, and the suction conveyor 76 return to their original positions after the operation. FIG. 19 is a bottom view of a corrugating apparatus for explaining still another embodiment of the corrugated cardboard manufacturing method according to the present invention.

The rack-shaped forming table 7 of the step forming apparatus of this example has a large number of step forming teeth ^{7 that} are inclined to the forming surface 71 by a predetermined angle 6 to 9 with respect to the width direction of the forming surface 71. 2 are formed, and a step roll 70 is provided so as to mesh with the step forming teeth 72.

The other structural parts of this apparatus are almost the same as those of the apparatus shown in Figs. 17 and 18 and a square-shaped core piece 17 of a predetermined width is placed on the molding surface 71 of the molding table 7. The suction direction is maintained so that the width direction of the mold coincides with the radiating direction of the molding surface 71, and in this state, the molding table 7 or the step roll 70 is moved by the required amount along the transfer direction 7a of the core piece 17 In addition, a stepped core having a corrugated step that is inclined to one side by a predetermined angle 09 with respect to the width direction can be manufactured. FIG. 20 is a front view of a main part of a corrugating apparatus used in still another embodiment of the corrugated cardboard manufacturing method according to the present invention.

The step forming apparatus of this example includes a first forming table 7 and a second forming table r, which are formed in a rack-down position and have the same function, and are operated at the same time while being shifted from each other, and a second station. It is composed of a forming cam group 8 installed below 7c and a suction conveyor 76 installed below the first station 7b. The molding tables 7 and 7 ′ themselves are configured in exactly the same manner as the molding table 7 in the step molding apparatus shown in FIGS. 17 and 18, and the specific configuration is shown in FIGS. 17 and 18. The same reference numerals as those used for the molding table 7 are shown in the drawings, and description thereof is omitted.

Before the step molding, the molding table 7 is stationary at the first station 7b with the molding surface 71 slightly approaching the suction conveyor 76, and the driving device (not shown) causes At the same time as the movement of 7, move horizontally to the varnish station 7c, then move to the third station indicated by 7d, ascend further upward, and move horizontally in the direction of £ ¾. Move to a position above one station 7b, and return to the first station 7b to return to a state slightly closer to the suction conveyor Ί6. Work.

The second molding table 7 'operates in a similar manner to the first molding table 7 at a different timing.

The forming cam group 8 has a step forming tooth 81 that meshes with the individual step forming teeth 7 2 of the forming tables 7 and 7 ′, and the forming tables 7 and 7 ′ stopped at the second station 7 c. It is constituted by a number of cam pieces 80 arranged in parallel in a state opposite to the molding surface 71. Each cam piece 80 is configured so that the teeth 81 are heated by a step (not shown), and is constantly urged downward by a panel (not shown). The molding tables 7 and 7 ′ stopped at 7 c are configured so as to be located below the molding surface 71 of the molding tables 7 and 7 ′ at a fixed distance below.

8 2 presses each cam piece 80 against the forming surface 7 1 of the forming base 7 or 7 ′, and presses the tooth 81 of the cam piece 80 between the step forming teeth 7 2 of the forming base 7 or 7 ′. It is a roll and is operated by a driving device (not shown) so that its axis forms a horizontal rectangular moving rail 83 on a vertical plane. The pressing roll 82 is initially in a state in which its axis is located at the lower right end start point 84 on the movement trajectory 83 and does not contact the forming cam group 8. Is held on the molding surface 7 1 of the upper molding table 7 or 7 ′, the cam pieces 80 are sequentially moved from the right side of the figure by rising along the movement locus 83 and moving leftward in the figure. It moves into the teeth 72 of the molding surface 71 and moves down to the left end, moves rightward in the figure, and returns to the starting point 84 again.

The core piece 17 previously cut into a square or a parallelogram is supplied to a suction conveyor 76 along a transfer direction indicated by an arrow 7a by a feed roll 75 also serving as a heating roll, and the suction conveyor 76 The suction table is transferred to a position below the molding surface 71 of the molding table 7 stopped at the first station 7b while being sucked, and the suction conveyor 76 is stopped. During this time, the middle core piece 17 is transported in such a manner that the opposite parallel sides of the middle piece 17 do not intersect the teeth 72 of the forming base 7 at right angles, as shown in FIG. When the suction conveyor 76 stops, the suction function of the conveyor 76 stops, and the communication hole 73 of the first molding table 7 communicates with the vacuum pump through the connection pipe 74, and the core piece on the suction conveyor 76 17 is held by suction on the molding surface 71 of the molding table 7. At the same time as the suction holding, the first molding table 7 moves to the first varnish station 7c by the driving device, and at the same time, the second molding table 7 'moves above the first station 7b and descends. Simultaneously with this movement, the pressing roll 82 located at the starting point 84 rises along the trajectory 83 and moves in the direction of the drawing: the teeth 81 of the cam piece 80 from the right end of the drawing. : By sequentially engaging the teeth 7 2 of the molding surface 7 1 in the direction, the corrugated steps 17 on the molding surface 51 of the molding table 7 Molded. When the pressing roll 82 moves to the left end along the rectangular locus 83, it moves down, moves rightward in the figure, and returns to the starting point 84 again.

As described above, while the step is being formed by the first forming table 7 and the forming cam group 8, the forming surface 7 1 of the second forming table 7, which is moving to the first station 7b, Next, the core piece 17 transferred onto the suction conveyor 76 is suction-held. The second molding table 7 'moves to the varnish station 7c in synchronization with the movement of the first molding table 7 to the third station 7d.

The flow hole 73 of the molding table 7 moved to the third stage 7d is switched from the iE vacuum pump to the E compressor by the switching valve of the connecting pipe 74, and communicates with the small hole of the molding surface 71 for the compressor. With the air blown out from 77, the stepped core 18 comes out of the molding surface 71 and falls onto a base (not shown) below.

During this time, the pressing port 82 operates in the same manner as described above, and the corrugated step is formed obliquely on the core piece 17 held on the forming surface 71 of the second forming table 7 '. .

When the core piece 11 is separated from the first molding table 7, the molding table 7 rises and returns to the first station 7b, and at the same time, the second molding table 7 'moves to the third station 7d. Then, the stepped core 18 is laid from the second molding table 7 ′, and the first molding table 7 sucks and holds the subsequent core piece 17 on its molding surface 7 1, and Move to station.

Hereinafter, by repeating the same operation, the stepped core 18 having the step 11 inclined at a predetermined angle with respect to the width direction is continuously manufactured.

Forming the teeth 72 of the forming surfaces 7 1 of the forming tables 7 and 7 ′ in FIG. 20 in a state in which the teeth 72 are inclined at a fixed angle to the width direction similarly to the forming table 7 in FIG. This many A forming cam group 8 having a large number of cam pieces 8 1 corresponding to the teeth 72 of the forming table 7, and the forming tables 7, r, the forming cam group 8, and the pressing roll 8 2 are operated as described above. A step having an oblique waveform with respect to the core piece 17 can be continuously formed. Industrial applicability

ADVANTAGE OF THE INVENTION According to the cardboard manufacturing method and the cardboard manufacturing apparatus according to the present invention, it is possible to mass-produce a step that is oblique to the base paper smoothly and without breaking the base paper.

Claims

The scope of the claims

1. While continuously feeding the core base paper of a fixed width, between a pair of step rolls in which step forming teeth are formed along the axial direction, 15 A method for manufacturing a stepped ball, comprising a step of manufacturing a stepped core having a step inclined with respect to a width direction by sandwiching the stepped core while forming an insertion angle of up to 84 °.

2. The method for producing corrugated cardboard according to claim 1, further comprising a step of controlling the posture of the core base paper so that the rie insertion angle does not change immediately before the core base paper is sandwiched between corrugated rolls. , Cardboard manufacturing method.

3. While continuously transferring the stepped core manufactured by the method described in claim 1 in a state where the step of the stepped core is parallel to the step opening, A step of continuously gluing to the top of one side of the core,

Producing a single-sided cardboard by continuously laminating a liner to the glued step top of the stepped core.

4. In the step of gluing the step top on one side of the stepped core and the step of laminating the liner to the pasted step, the stepped core is made to have the same pitch as the step forming teeth of the step roll. The guide roller is formed with guide teeth having a lower height and a lower tooth height than the step-formed teeth, and is continuously transferred in a state where the step of the stepped core is guided between the guide teeth. 4. The method for producing a corrugated cardboard according to claim 3, wherein:

5. a step of continuously transferring one single-faced cardboard manufactured by the method according to claim 3 or 4 from one direction while the step faces upward; and A step of continuously changing the direction of the single-faced corrugated cardboard so that the steps face downward while bending along the forming direction of the corrugated cardboard;

In the middle of the direction change step or after the direction change, a step of continuously gluing the step top of the one-sided step ball,

The other single-faced cardboard manufactured by the method according to claim 3, wherein the step faces upward, and the step of the single-sided cardboard is opposite to the step of the one single-sided cardboard. The other one-sided corrugated cardboard is successively superimposed on the lower surface of the one-sided corrugated cardboard while being integrally operated from the other direction while being inclined in the direction, and the corrugations of the two single-sided cardboards are continuously bonded to each other. And a method for producing corrugated cardboard.

6. A step of manufacturing a parallelogram-shaped core piece by cutting a core paper of a fixed width at regular intervals;

The core piece is placed between a pair of step-forming machines in which step-forming teeth are formed in a straight line in parallel with each other, and one side of the core-piece is directed sideways with respect to the step-forming teeth of the step-forming machine. Manufacturing a stepped core having a step inclined with respect to the width direction of the core piece by sandwiching the core piece in a state of forming an insertion angle of 84 °. Method.

7. While forming one diagonal of the core piece at an acute angle, the core piece is sandwiched between the pair of step forming machines from one acute angle portion, and at the time of the acute angle and the sandwiching. 7. The method for producing a cardboard according to claim 6, characterized in that a square stepped core is produced by appropriately selecting an insertion angle.

8. The method for manufacturing corrugated cardboard according to claim 6, wherein the corrugating machine is a pair of corrugated rolls.

9. One of the pair of step forming machines is a rotatable step forming roll,

The other of the pair of step forming machines is constituted by a rack-shaped forming table having aligned step forming teeth that engage with the step forming teeth of the step opening on a forming surface facing the step roll,

The core piece is suction-held on the molding surface of the molding table,

Manufacturing the stepped core by moving the forming table or the step roll in a direction orthogonal to the step forming teeth in a state where the core piece is sandwiched between the forming table and the step opening. A method for manufacturing a corrugated cardboard according to claim 6, characterized in that:

10. One of the pair of step forming machines is a forming table having a forming surface in which step forming teeth are formed in a rack shape,

The other of the pair of step forming machines has, at one end, one step forming tooth that can be inserted between the step forming teeth of the forming table, and the step forming teeth are formed on the forming surface of the forming table. And a group of force members including a large number of cam pieces densely arranged in parallel with each other, and holding the core piece on the forming surface of the forming table.

Manufacturing the stepped core by sequentially inserting each of the cam pieces from one end of the cam pieces in the parallel direction to the other end between the step forming teeth of the forming base. 7. The method for producing a cardboard according to claim 6, wherein:

11. a step of continuously gluing the stepped core manufactured by the method according to claim 6 onto the step top on one surface of the stepped core while transferring the stepped core.

The liner cut to the same size as the stepped core is transferred on the one surface side of the stepped core in synchronization with the stepped core, and is stacked on the one surface of the stepped core. A method for manufacturing corrugated cardboard, characterized by including a step of bonding.

12. Upper and lower steps having step forming teeth parallel to the axis,

It is installed below the lower step opening so as to be parallel to the step opening, and has the same pitch as the step forming teeth of the lower step opening and has a lower tooth height than the step forming teeth, and the guide teeth. A lidar roll with

A gluing device including an applicator roll installed along the rider roll, and a press roll installed along the rider roll behind the abrike overnight roll in the rotation direction of the rider roll. Prepared,

A step pole comprising a single facer, characterized in that the core base paper is continuously sandwiched between the upper and lower step rolls at an angle of incidence oblique to the side of the joining line of the step rolls. manufacturing device.

13. While the stepped core having a step formed in the core base paper passes through the lower step roll and the rider roll and is sandwiched between the rider roll and the press roll, the stepped center is inserted. 13. The corrugated cardboard manufacturing apparatus according to claim 12, further comprising a posture control means for urging in a direction in which the angle becomes smaller.

14. It has two single-facers as described in claim 12 or 13,

Each single facer has a single-faced corrugated cardboard manufactured by each single facer continuously in the same area with the forming directions of the steps reversed. It is installed opposite to a distant position so that it is sent out,

The single-faced corrugated cardboard delivered from each single facer overlaps with the upper and lower shafts of the single facers in a state where the single-faced corrugated cardboard is vertically overlapped in the facing area of both single facers. As seen from above, a predetermined opening angle is formed,

Between the two single-sided cardboards at the intersection of the two single-sided cardboards, the feeding direction of the single-sided cardboard is reversed along the step of one of the single-sided cardboards sent to the upper position, and the one single-sided cardboard is moved downward. A rider roll for changing the direction to be superimposed on the other single-sided corrugated cardboard to be sent to the position is installed. A gluing device including an apricot roll along

A cardboard manufacturing apparatus comprising a double facer, characterized in that a breath roll is provided at a lower portion of the direction changing rider roll or at a position rearward of the rider roll in the transfer direction of the single-sided cardboard.

15. Upper and lower step rolls having step forming teeth parallel to the axis,

It is installed so as to be separated from and parallel to the upper step in the extension direction of the upper step, and has a lower tooth height than the step forming teeth at the same pitch as the step forming teeth of the step. A rider roll having guide teeth,

A gluing device including an apricot overnight roll installed at the lower part along the lidar roll,

And a press roll installed at a rear position in the unwinding direction of the rider roll,

Manufacturing a corrugated cardboard made of a single fiber, characterized in that the core base paper is continuously sandwiched between the upper and lower corrugated rolls at an insertion angle inclined sideways with respect to the joining line of the corrugated rolls apparatus.

16. Two single-facers described in Claims are provided, and each single-facer has a single-faced corrugated cardboard manufactured by each single-facer, and the molding directions of the steps are opposite to each other. To the same area continuously It is installed facing the crowded position so that it is sent out,

The axes of the single-faced corrugated cardboards sent from each single-feather are overlapped with each other so that the single-faced cardboard sent out from each single-feather overlaps vertically apart in the opposing area of both single-feathers. , Forming a predetermined opening angle when viewed from above,

Between the two single-sided cardboards at the intersection of the two single-sided cardboards, the feeding direction of the single-sided cardboard is reversed along the step of one of the single-sided cardboards sent to the upper position, and the one single-sided cardboard is moved downward. A rider roll for changing the direction which is superimposed on the other single-sided corrugated roll sent out to the position is installed, and the rider roll is located in a position not to interfere with the other single-sided corrugated cardboard in the vicinity of the rider roll for changing the direction. A gluing device including an applicator roll is installed along

A corrugated cardboard manufacturing apparatus comprising a double facer, characterized in that a press roll is provided at a lower portion of the direction changing rider roll or at a position rearward of the rider roll in the transfer direction of the single-sided corrugated cardboard.

17. The opening angle between the axial centers of the step rolls in the two single-fusers is set such that the mutual inclination angle with respect to the width direction of the step of the single-sided corrugated cardboard sent out from both single feathers is symmetric. 17. The corrugated cardboard manufacturing apparatus according to claim 14 or 16.

18. Upper and lower step rolls having step forming teeth parallel to the axis,

A guide tooth is provided in the feed direction rearward of the step opening position in parallel with the step direction, and has a guide tooth having the same pitch as the step forming teeth of the step roll and a lower tooth height than the step forming teeth. Lidar roll,

A gluing device including an abrique overnight roll installed at a lower portion thereof along the lidar roll,

A transfer device installed in the direction in which the rider roll is rubbed out,

And a press roll installed facing the end of the transfer device, a core piece of a predetermined length cut into a parallelogram between the upper and lower step rolls, one side of the core piece. Insert whose side is inclined to the side of the joint line of the step A corrugated cardboard manufacturing apparatus characterized in that the cardboard is sandwiched while forming corners.