JPH01168441A - Manufacture of laminate for honeycomb core - Google Patents

Abstract

PURPOSE:To form a laminate for a honeycomb of high quality inexpensively by alternately folding a long base material sheet at an each predetermined interval in a direction for developing each cut part, and adhering them through adhesive coating in a positional relationship of corresponding contact thereof. CONSTITUTION:A long base material sheet 5 is alternately folded and laminated at the positions of cut parts 13, 13a in a plane state with the cut parts 13, 13a disposed outside. A predetermined number of the folded sheets 18, 18,... coincide at their folding seams, and are folded uniformly at the adjacent sheets in all surfaces in a close contact state. Adhesives 7, 7,... or 7a, 7a,... coating the opposite faces 5a, 5b or 5b, 5b hold positional relationship of the corresponding contacts. Then, the predetermined number of the folded sheets 18, 18,... are pressurized and heated by holding the state, and adhered in a state that they are folded and laminated through the adhesives 7, 7,... or 7a, 7a,... coating the faces, thereby obtaining a laminate 20 for a honeycomb.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a method for manufacturing a laminate for a honeycomb core.

More specifically, the present invention mainly relates to an improvement in a method for manufacturing a laminate that is formed as a step for forming a non-metallic honeycomb core such as a paper honeycomb core,
The present invention relates to a method for manufacturing a laminate for a honeycomb core, which has less wasteful parts and can easily form a high-quality 1U body for a honeycomb core.

"Prior Art" and "Problems to be Solved by the Invention" Conventionally, for example, when forming a laminate for a non-metallic honeycomb core such as a paper honeycomb core, generally,
Adhesive is applied in stripes along the longitudinal direction or a direction perpendicular to the longitudinal direction, that is, along the width direction, at a predetermined pitch on one side of a long base material sheet that is paid out from a roll-shaped base material sheet. At the same time, the adhesive is applied to the other surface in a linear manner at a position shifted by half a pitch from the adhesive application position on the one surface, and then the long base material to which the adhesive is applied is applied. Layer long base material sheets of the same width with no adhesive applied on one side, adhere both long base material sheets, and roll up the sheets onto a drum while adhering them to form a predetermined length. A laminate for a honeycomb core was formed by cutting the honeycomb core into sections.

However, in such a method of manufacturing a laminate for a honeycomb core, although it is possible to continuously form a laminate for a honeycomb core, the following problems have been pointed out.

First, when forming a honeycomb core that is long in the stretching direction, it is necessary to increase the number of laminated sheets, but as the number of laminated sheets increases, more sloping wasted parts occur at the cut section. was.

Second, when a round drum is used, depending on the material of the base material, it tends to curl easily, making subsequent work and handling difficult; and when a square drum is used, for example, It was necessary to prepare drums of various lengths to be cut.

Thirdly, when applying adhesive along the width direction of a long base material sheet because a long honeycomb core is required in the ribbon direction, the adhesive position shifts as the winding diameter increases. Therefore, when a honeycomb core is formed, the shape of the cells becomes nonuniform, making it impossible to form a high-quality laminate with a large number of layers.

Fourthly, when cutting a predetermined number of laminated sheets wrapped around a drum to a predetermined length, it is necessary to remove the drum each time, so the cutting process takes a lot of time. It had

Furthermore, if the base material is extremely stretchable, it is impossible to form a high-quality laminate using the above method. When molding, for example, as above,
A long base material sheet that has not been coated with adhesive is adhered to one side of a long base material sheet that has adhesive coated on both sides, and this is cut into predetermined lengths. A manufacturing method has been used in which base sheets are laminated one by one in sequence, but when molding is performed using a series of manufacturing equipment, the size of the base sheet is particularly large, and
When the thickness of the base material is thin, it tends to sway during the process of being transferred to the lamination process, and therefore it is difficult to stack the base materials in a predetermined positional relationship. It was extremely difficult to mold a high-quality laminate.

Therefore, the only way to mold a high-quality laminate using such a base material is to perform WIM one by one by hand, which requires a large number of man-hours to form, and is difficult to form. There was a drawback that the laminate for the honeycomb core was extremely expensive.

The present invention was made in view of the above-mentioned circumstances, and its purpose is mainly to form a laminate for a non-metallic honeycomb core such as a paper honeycomb core, for example, when the material of the base material is Even if the material is extremely stretchable or the base material is thick, it is possible to easily and inexpensively form a high-quality laminate for a honeycomb core with less wasted parts. The purpose of the present invention is to propose a method for manufacturing a laminate for a honeycomb core that can be used to produce a laminate for a honeycomb core.

"Means for Solving the Problems" The present invention has been made to achieve the above object, and its technical solution is to: Adhesive was applied in a line shape at a predetermined pitch, and the adhesive was also applied to the other side in a position that was shifted by half a pitch from the adhesive applied to one side. At each position separated by a predetermined distance in the longitudinal direction of the long base material sheet, a predetermined amount is applied over the entire length of the long base material sheet in the width direction so that the relationship is alternated from one side to the other side. A predetermined number of each folded base material sheet is then folded alternately along the cut portion in the direction in which each cut portion is opened for each position of these cut portions. , are adhered to each other through adhesives applied at positions corresponding to each other.

"Function" A laminate for a honeycomb core formed by the manufacturing method of the present invention is coated with adhesive in stripes along its longitudinal direction at a predetermined pitch on both surfaces, in a positional relationship that is shifted by a half pitch from each other. The long base material sheet coated with is folded alternately at predetermined intervals along the cut portions formed alternately along the entire length in the width direction from alternate sides in the direction in which each cut portion is opened. The base material constituting the honeycomb core laminate is formed by bonding the base sheets, which cannot be folded and stacked one on top of the other, with an adhesive applied in a positional relationship that corresponds to and abuts each other. Even when the number of sheets is extremely large, the folds of each base material sheet match, and since the folds are pre-formed with cut portions, it is easy to form them, and the adjacent base sheets can be easily formed. The material sheet is evenly and closely pressed on all sides, and even if the base material is thick, for example, no bulges will occur near the folds due to poor formation of folds, poor adhesion, etc.

Therefore, it is only necessary to slightly cut off the ends of the folds, and there are very few wasteful parts, and the work of cutting the ends is easy. In addition, since the long base material sheet to which no adhesive is applied is directly folded into a flat shape at predetermined lengths and formed, there is no tendency of bending and the subsequent work is easy, and Even when the base material is made of an extremely stretchable material, it is possible to produce high-quality laminates for honeycomb cores using a series of manufacturing equipment. Continuous production is possible.

Furthermore, each of the folded and stacked base sheets is folded in a positional relationship such that the - side faces face each other or the other faces face each other, and adhesives applied to both base sheets located opposite each other are used. The adhesives maintain the positional relationship of corresponding abutment, and therefore both base sheets are bonded via these adhesives. In conventional bonding methods that use adhesives, it is difficult to apply the adhesive evenly using inexpensive ordinary application rolls depending on the material of the substrate, which can lead to poor adhesion. When forming a laminate for a honeycomb core using materials, for example, problems such as the need to apply adhesive using an expensive gravure pattern application roll are solved, and the material of the base material can be Conventionally, even if a special coating roll is required, a honeycomb core laminate having sufficient adhesive strength can be formed using an inexpensive ordinary coating roll.

"Example" Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

Fig. 1 is an explanatory diagram showing the manufacturing process according to an embodiment of the present invention, Fig. 2 is a plan view of the main part of a long base material sheet coated with adhesive, and Fig. 3 is a cutting and forming device, and a folding process. FIG. 4 is a front view of the main parts of the folded base sheets, and FIG. 5 is a perspective view of the laminate for honeycomb core with both end folds cut.

In the figure, one surface 5a of a long base material sheet 5 is fed out by a feed roller 4 from a rolled base sheet 1 rotatably supported by an unwinding device 2 via guide rollers 3. First, the print roller, backup roller, adhesive receiver, etc. (not shown) are placed on the surface (in the example, the surface).
Adhesives 7, 7, etc. are applied in stripes of a predetermined width along the longitudinal direction of the long base sheet 5 at predetermined pitches P using an adhesive application bag rI16, and then Surface 5b
An adhesive coating device 6a having the same configuration as the adhesive coating device 6 is applied to one surface 5a (in the embodiment, the back surface).
Glue in a striped manner at the same pitch P as the adhesive 7.7... at a position that is shifted by a half pitch 1/2P from the application position of the adhesive 7.7... applied to the Agents 7a, 7a
Apply... Adhesive 7, 7..., 7a, 7a.
While the long base sheet 5 coated with... passes through the drying device 8, the adhesives 7.7..., 7a, 7a...
The material is first dried, and then guided by guide rollers 3, 3, .

The cut forming device 9 is disposed between the feed roller 4 and a second feed roller 12 that is disposed at a predetermined distance downstream from the feed roller 4 in the transport direction of the long base sheet 5. The cutting and forming devices 9 are opposed to each other at a distance in the transport direction, with the long base material sheet 5 being transported while being supported in a stretched state by both feed rollers 4 and 12. In this aspect, a cutter 10.10a having a length longer than the length in the width direction of the long base material sheet 5, which is arranged in a positional relationship perpendicular to the longitudinal direction of the long base material sheet 5, and each cutter 10, 10a. It is approximately the same as the cutters 10, 10a arranged in a positional relationship opposite to each other with the long base material sheet 5 in between.
A set of receiving members 11 having a length. These cutters 10, 10a and receiving members 11. lla
The distance between the cutters 10 and 10a is such that the long base sheet 5 can always pass between the cutting edge of the cutter 10.10a and the receiving member 11.degree. 11a with a margin. The cut portion 13.1 moves forward in the direction of the receiving member 11.11a and extends along the width direction of the elongated base sheet 5.
3a. In addition, this cutter 10
, 10a are arranged such that the cutting edge of the cutter 10° and the receiving member 11 . The spacing between lla can be adjusted.

Further, the operation of cutters 10 and 10a is controlled by control 911, respectively.
Linked to the amount of transport of the long base material sheet 5 by an R structure (not shown), that is, linked to the movement of the long base material sheet 5 every time the long base material sheet 5 is transported a predetermined length. It is designed to operate alternately.

Therefore, for example, in advance, the cutter 10 at the time of operation is
．． The cutting edge of 10a and the receiving member 11. By adjusting the interval between lla to be 1/2 to 2/3 of the thickness of the long base material sheet 5, each surface 5a, 5b of the long base material jeetla that is continuously transported is 1 of the thickness alternately across the entire length in the width direction at predetermined intervals.
A cut portion 13.13a having a depth of 1/2 to 1/3 is formed.

In the embodiment, one surface 5 is cut by the cutter 10.
a (front surface) side, and the other surface 5 by the cutter 10a.
Cut portions 13 and 13a are formed on the b (back) side, respectively.

The long base material sheet 5 that has passed through the cut-forming bag W9 is then passed through the third bag W9.
As shown in the figure and FIG. 4, the paper is guided by swinging guide rollers 14 and sent to a folding device 15.

The swinging guide roller 14 having a pair of rollers 14a and 14b is disposed below the second feed roller 12, and swings from side to side in a pendulum shape with the second feed roller 12 as a fulcrum while sending out the long base sheet 5. The width of the swing can be adjusted by an amplitude adjustment mechanism (not shown), and this swing can be controlled by a control device (not shown) to control the length of the long base material. In conjunction with the amount of conveyance of the sheet 5, the long base material sheet 5 has a predetermined length, that is, the cut portion 13°13
During the long transfer between a and a, the barrel moves from one end side to the other end side.

The folding device 15 separates the long base sheet 5 and
A pair of folding rollers 1 facing each other with a predetermined interval
6, 16a, and these folding rollers 16, 16a
are adapted to reciprocate within a predetermined distance by a working distance adjustment mechanism (not shown), and are capable of forward and reverse rotation, and rotate in the direction of movement of each other. The sheet is always folded by the operation of the folding table 17, which is biased in the direction of contact with both folding rollers 16, 16a, and is brought into slight pressure contact with the surface of the base sheet 18 located on the folding table 17. Further, the reciprocating motion of both folding rollers 16, 16a is controlled by the control bag r! t (not shown), the long base material sheet 5 is fed a predetermined length in conjunction with the amount of transport of the long base material sheet 5, that is, the length between the cut portions 13 and 13a. It moves from one side to the other end.

However, also the swinging guide roller 14 and the folding device 15
The two folding rollers 16, 16a are interlocked with each other and move in the same direction.

Therefore, by the folding device 15, the cut portion 13° 13a
When folding the elongated base material sheet 5 into predetermined lengths with the outer side of the elongated base material sheet 5, the length of the elongated base material sheet 5 is adjusted in advance so that the length of the base material sheet 18 to be folded matches the interval between the cut portions 13.13a. The operating interval of the cutter 10.10a with respect to the amount of conveyance of the sheet 5, the amplitude of the swinging guide roller 14, and the folding roller 16
, 16a, as well as the operating positions of the swinging guide roller 14 and the folding rollers 16, 16a, it is now possible to create a structure as shown in FIGS. 3 and 4, for example. When folding along the cut portion 13a formed on the other surface 5b (back surface), the swinging guide roller 14 and both folding rollers 16.degree. 16a are both located at the left end between the operating positions, Further, the long base material sheet 5 that is guided by the swinging guide roller 14 and sent out is sent out toward the left-hand folding section where the long base material sheet 5 is folded and stacked into base material sheets 18 of a predetermined length. At the same time, the cut portion 13a is located on the outside at the corner portion where the fold is formed, and is located between the pair of folding rollers 16, 16a in a slightly opened state due to its own weight or the like. In this state,
The left folding roller 16 is located at a position somewhat outside the folding section, that is, toward the left side, and
The right folding roller 16a is located at a position somewhat inward from the folding portion, and maintains a state in which it is in slight pressure contact with the already folded base sheet 18.

Next, the oscillating guide roller 14 and both folding rollers 16, 16a in such a state move to the right in accordance with the movement of the elongated base sheet 5 that is subsequently sent out. When the folding roller 16° 16a moves to the right, the folding roller 16 located on the left side presses downward the cut portion 13a located at the left corner in a slightly opened state, and then The cut portion 13a is bent in the direction of being further opened as the cut portion 13a is moved to the right while being in slight pressure contact with the base sheet 18 that is being folded, and the cut portion 13a is placed in close contact with the base sheet 18 that has already been folded. At the same time, as the folding roller 16 moves, the base sheet 18 is already folded with the other surface 5b (back surface) of the long base sheet 5 being the upper surface. The base material sheet 18 is stacked on top of the base material sheet 18. In this way, the swinging guide roller 14 and both folding rollers 16, 16a are moved to the right end position r
jt (the imaginary line position in FIG. 3), the corner portion of the right folded portion now has one surface 5a separated by a predetermined length from the cut portion 13a of the long base sheet 5. (
The cut portion 13 formed on the front side is located on the outside and in a slightly open state between the pair of folding rollers 16, 16a.

Next, as the long base material sheet 5 is fed out, the swinging guide roller 14 and both folding rollers 16 are moved.
．． 16a moves to the left, so as above, the cut portion 1
3 is bent in the opening direction to form a crease. Therefore, by repeating this process, the long base material sheet 5 has the cut portion 13.13a at the position of the cut portion 13.13a.
These are alternately folded and stacked into a flat shape, each with the outside as the outside. The predetermined number of base sheets 18, 18... folded in this way have their respective folds coincident, and adjacent base sheets 18, 18 are evenly and closely spaced on all sides. It is folded into a flat shape with a predetermined thickness. Further, since the adjacent base sheets 18.18 are folded in a positional relationship such that one side 5a or the other side 5b of the long base sheet 5 faces each other, these opposing surfaces 5a, 5a
Alternatively, the adhesives 7, 7, 7, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 7a, 8b, 8b, 8b, 8b, 8b, 7a, 7a, 7a, 7a, 7a, 7a, .

Note that when folding, there is almost no extra tensile force applied to the long base sheet 5, so even if the long base sheet 5 is made of an extremely stretchable material, it will not be possible to The folds of each of the base sheets 18, 18... can be made to coincide with each other.

In addition, even if the long base material sheet 5 is thick, it is possible to easily form folds that are close to each other, so that after adhesion, there may be defects in the formation of creases near the folds, and poor adhesion. There will be no bulges caused by such things.

Next, a predetermined number of folded base sheets 18.1
By pressurizing and heating 8... while maintaining that state, each base sheet 18.18... has an adhesive 7.7... or 7a, 7a... applied to each surface.
The honeycomb core laminate 20 is obtained by adhering the honeycomb cores in the folded state through the .

The honeycomb core laminate 20 formed in this manner has adhesive applied to each surface of each of the opposing base sheets 18.18. 7, 7... or 7a+7a..., so the material of the base sheet 18 is
For example, in the past, when adjoining two base sheets were bonded together using an adhesive applied to one side of one of the base sheets, an inexpensive ordinary application roll was used to hold the adhesive in place. It is extremely difficult to apply it evenly,
Even if the material is such that it is impossible to form a laminate for honeycomb core with sufficient adhesive strength due to poor adhesion, etc., a laminate for honeycomb core that has sufficient adhesive strength with an inexpensive ordinary application roll. 20 can be molded. Further, since it is only necessary to slightly cut off the ends of the matching folds, there is very little waste.

The formed honeycomb core laminate 20 is coated with adhesive 7.7
, 7a, 7a, . . . , cut into predetermined lengths in a direction perpendicular to 7a, . . . and then expanded to obtain a high quality honeycomb core with a uniform cell shape.

"Effects of the Invention" As detailed above, according to the method for manufacturing a laminate for a honeycomb core according to the present invention, even when the number of base sheets constituting the laminate for a honeycomb core is extremely large, each It is possible to mold a laminate for a honeycomb core in which the length of each base material sheet is the same without causing any deviation in the adhesion position of the base material sheets, and in particular, when the thickness of the base material is thick. Even in the case of a honeycomb core, each base sheet can be adhered to the entire surface in close contact, so there is very little waste, and the formed laminate for the honeycomb core can be folded into a flat shape. Since it is made of a base material sheet that has been flexed, it is easy to perform subsequent work without causing bending, and even if the material of the base material is extremely stretchable, it is easy to create high-quality sheets. It is possible to mold a laminate for a honeycomb core, and it is also possible to mold a laminate for a honeycomb core of high quality with sufficient adhesive strength using an inexpensive ordinary coating roll, regardless of the material of the base material. The drawbacks of conventional methods for manufacturing m-layer bodies for honeycomb cores, which are mainly formed as a step for forming non-metallic honeycomb cores such as paper honeycomb cores, have been eliminated. Demonstrates excellent effects.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the manufacturing process according to an embodiment of the present invention, FIG. 2 is a plan view of the main part of a long base sheet coated with adhesive, and FIG. 3 is a cutting and forming device, and a folding process. FIG. 4 is a front view of the main parts of the folded base sheets, and FIG. 5 is a perspective view of the laminate for honeycomb core with both end folds cut. 1... Rolled base sheet, 2... Unwinding device, 3
... Guide roller, 4 ... Feed roller, 5 ... Long base material sheet, 5a ... One side, 5b ... Other surface, 6°6a ... Adhesive coating device 7, 7a... Adhesive, 8... Drying device, 9... Cutting and forming device, 10
．． 10a...Cutter, 11. lla...receiving member, 1
2...Second feed roller, 13.13a...Cut portion,
14... Swinging guide roller, 15... Folding device,
16.16a...Folding roller, 17...Folding table, 18...Base material sheet, 20... Laminate for honeycomb core.

Claims (1)

[Claims] On one side of the long base material sheet, along its longitudinal direction,
Adhesive is applied in a line shape at a predetermined pitch, and at the same time, the adhesive is applied in a line shape on the other surface at a position shifted by a half pitch from the adhesive application position on the one surface, and the adhesive is applied in a line shape. At each position separated by a predetermined distance in the longitudinal direction of the long base sheet to which the agent is applied, a predetermined depth is applied over the entire length of the long base sheet in the width direction so that the relationship is alternate from the one surface or the other surface side. Form a cut portion of the length, and then, for each position of the cut portion,
A honeycomb core characterized in that a predetermined number of base sheets are alternately folded in the directions in which the cut portions are opened, and a predetermined number of folded and stacked base sheets are adhered to each other via adhesive applied in a positional relationship corresponding to each other. Method for manufacturing a laminate for use.