JPH039811B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a laminate for a honeycomb core, and more specifically, the present invention relates to a method for manufacturing a laminate for a honeycomb core, and more specifically, it continuously and efficiently uses a strip material such as a foil or a sheet. The present invention relates to a method of manufacturing a laminate for a honeycomb core.

[Prior Art] Conventionally, as a method for manufacturing a laminate for a honeycomb core, the following method described in JP-A-60-157847, for example, has been known. Apply adhesive to one or both sides of the strip material using a separate application roll in a striped pattern at predetermined intervals, dry it in a dryer, and then press it against a cylindrical drum with a pressure roll. A method of manufacturing a laminate for a honeycomb core by bonding and laminating strip materials.

The honeycomb core material manufactured by this method is then made into a honeycomb core by removing the wound strip material from the cylindrical drum, cutting it into a predetermined length, and pulling it in the stretching direction.

A method in which flat sheets of foil or film coated with adhesive are cut to a certain size, stacked one by one by hand, and then bonded by pressure and heat.

The honeycomb core material manufactured using this method is
Thereafter, it is pulled in the stretching direction to form a honeycomb core.

[Problems to be Solved by the Invention] However, in the above method, the length of the strip material varies from layer to layer due to an increase in the winding diameter of the cylindrical drum as the strip materials are stacked, and when a honeycomb core is formed, the length of the strip material differs from layer to layer. As a result, the honeycomb shape becomes uneven.

That is, the length of the inner strip material is shorter than that of the outer strip material. Therefore, when a honeycomb core is formed, the honeycomb shape of the inner portion on the cylindrical drum is smaller than the outer portion.

In addition, although the above method does not cause the honeycomb shape to become non-uniform as in the above method, it is not possible to continuously manufacture a laminate for a honeycomb core as in the above method. Therefore, the work is very complicated and difficult, and productivity is poor.

That is, as in the method described above, adhesive is applied to the strip-shaped material fed out from the strip-shaped material coil using a separate application roll so as to form a striped pattern at predetermined intervals, and then dried in a dryer. It is conceivable to continuously manufacture a honeycomb core laminate by cutting a strip-shaped material coated with the above material into a predetermined size using a cutting machine. However, in order to accurately cut the strip material, it is necessary to stop the movement of the strip material during cutting. On the other hand, when the movement of the strip-shaped material stops, the adhesive in the portion that is in contact with the application roller oozes out, making it impossible to accurately apply the adhesive. Therefore, as mentioned above,
Continuously applying adhesive, cutting materials, and layering materials is extremely difficult.

[Means for Solving the Problems] The present invention employs the following configuration for the purpose of solving the above problems.

That is, the gist of the present invention is to apply adhesive to one or both sides of a plurality of strip-shaped materials using separate application rolls in a striped pattern perpendicular to the direction of movement of the materials; A method of manufacturing a laminate for a honeycomb core by laminating a plurality of strip materials together after passing through a predetermined route and cutting the laminate into predetermined lengths with a cutting roll, the coating interval of the coating roll being and the cutting interval of the cutting roll is set to an integer ratio, and the rotation ratio of the coating roll and the cutting roll is fixed to an integer ratio. be.

The band-like material in the present invention includes materials that are commonly used as base materials for honeycomb cores, such as metal foils such as aluminum foil and iron foil, paper such as paperboard, resin-impregnated paper, and synthetic paper, polyethylene, A wide range of materials can be used, including sheets of plastics such as polypropylene and fiber reinforced versions thereof. In the present invention, it is common for the strip material to be made of a single material due to the characteristics of the honeycomb core and in terms of manufacturing.
It is also possible to use a combination of various materials.

The adhesive used in the present invention may be dissolved or dispersed in water or other solvents, or as a so-called hot melt type in powder or solid form.
Alternatively, solvent-free liquid thermoplastic resins used as adhesives can be applied, and a film is formed by coating and drying or preheating on a strip material, and then heating and pressing after laminating these materials. Any material that can bond both materials together may be used. Preferred adhesives for the present invention are those made of thermoplastic or thermosetting resins such as epoxy-based, nylon-based, polyester-based, polyolefin-based, etc., such as epoxy-phenol, epoxy-nylon, and epoxy-nitrile. In some cases, adhesion that provides sufficient performance as a honeycomb core can be easily achieved.

The applicator roll for applying the adhesive to the strip-shaped material can be selected depending on the shape and characteristics of the adhesive, and if a liquid adhesive is used, the roll coater, especially the roller coater, can be used to apply the adhesive to the strip-shaped material at intervals parallel to the width direction. It is preferable to apply the coating using a roll whose surface has been processed so that it can be applied repeatedly with a constant coating width and a constant pattern.

In addition, in the present invention, it is also possible to apply a primer to the material as necessary before applying the adhesive, and depending on the material, the adhesive effect may be improved.
You can demonstrate even more.

In the present invention, adhesive is applied to one or both sides of the strip-shaped material parallel to the width direction.
The adhesive application width, application pitch, and pattern are determined by the shape of the final product, the honeycomb core, and can be adapted to any desired shape. For example, as shown in the cross-sectional views of FIGS. 2 and 3, adhesive 1 is applied only to one side.
A honeycomb core as shown in FIGS. 4 to 6 can be obtained from a laminate consisting only of the two strip-shaped materials 20 and 20a coated with 0. Note that the adhesive may be applied to both sides of the strip-shaped material, and in that case, the strip-shaped material coated with adhesive on both sides and the strip-shaped material coated with no adhesive at all may be laminated alternately.

In addition, honeycomb cores are generally required to have a regular hexagonal system or a series of identical shapes close to it in terms of appearance, strength, and productivity, so in such cases, the following spacing and Preferably, the width is selected.

In other words, when using a strip material with adhesive applied to both sides and alternately applied to the front and back surfaces in a striped pattern and a strip material without adhesive applied, the application position through the front and back surfaces is It is preferable that they all be spaced at regular intervals, in other words, that they are laminated so that the adhesive application position on the back side is located on the back side exactly halfway between the two adhesive application positions located at regular intervals on the front surface. On the other hand, even when using only the strip materials 20 and 20a as shown in FIG. 2 in which the adhesive 10 is applied only to one side, the back surface position of one strip material 20 is located exactly in the middle of the adhesive application position, that is, in the cross-sectional view. Ideally, the adhesive 10 should be laminated so that the adhesive 10 is applied at approximately equal intervals in a checkerboard pattern.

The cutting roll for cutting the laminated strip material in the present invention constitutes a so-called rotary cutter. This rotary cutter uses a shearing action between a cutting roll having one or more sets of blades and a fixed blade provided at a position facing the cutting roll across the laminated strip material.
The laminated strip material is cut into a predetermined length corresponding to the interval between blades provided on a cutting roll.

The rotation ratio of the coating roll and the cutting roll used in the present invention is maintained at an integer ratio using mechanical means such as a timing belt or electrical means such as feedback control.

[Function] In the method for manufacturing a laminate for honeycomb core of the present invention,
The ratio of the coating interval of the applicator roll to the cutting interval of the cutting roll is an integer ratio, and the rotation ratio of the applicator roll and the cutting roll is an integer ratio.

Therefore, the laminated strip material is always cut in contact with the blade provided on the cutting roll at the same position relative to the adhesive striped pattern of the laminated strip material. Since this cutting position is independent of the moving speed of the strip material, the present invention allows continuous production of the honeycomb core laminate.

[Example] An example of the present invention will be described with reference to the drawings. The present invention is not limited to this, but includes various embodiments without departing from the gist thereof.

FIG. 1 shows an apparatus used in a manufacturing method according to an embodiment of the present invention. In the figure, strip-shaped materials 40, 40a that are unwound from strip-shaped material coils 30, 30a are coated with adhesives 60, 60a in a striped pattern at predetermined intervals using applicator rolls 50, 50a (see FIG. (See Figure 3). After this,
The strip materials 40, 40a are dried in a dryer 70, and then formed into a laminated strip material 40b using a pair of adhesive rolls 80. Then, this laminated strip material 40b is cut into a predetermined length by a cutting roll 90 having a cutting interval that is an integral multiple of the coating interval of the coating rolls 50, 50a, and then the cut laminated strip material 40c
The lifting platform 110 is moved by the vacuum belt 100.
are carried one after another and stacked. When the number of laminated strip materials 40c on this lifting platform 110 reaches a predetermined number,
The laminated strip material 40c, which is laminated in large numbers, is pressed by a press or the like to form a laminate for a honeycomb core.

Further, the strip material 40, 40a or the laminated strip material 40b is moved by a large number of guide rollers 120a to 120.
m, positioning roller 130 and conveyance roller 14
0, it is transported along a predetermined route.

The alignment roller 130 is the guide roller 120
Sensors 150, 150 provided in front of i and j
The route length of the strip material 40a is adjusted by moving according to the adhesive application position on the strip material 40, 40a detected by the adhesive roller 80, and the adhesive application position of the strip material 40, 40a is adjusted when stacking with the adhesive roller 80. have a predetermined relationship.

Further, the conveyance roller 140 carries the laminated strip material 40b.
It functions to reliably feed the material to the cutting roller 90.

The application rollers 50, 50a, the cutting roll 90, and the conveying roller 140 are configured to always have a predetermined rotation ratio by means of a timing belt. In particular, the rotational speeds of the application rollers 50, 50a and the cutting roll 90 are configured to be in an integral ratio.

In the above apparatus, since the ratio of the coating interval between the coating rolls 50, 50a and the cutting interval of the cutting roll 90 is an integer ratio, and the rotation ratio of the coating rolls 50, 50a and the cutting roll 90 is an integer ratio, the lamination Even without stopping the strip material 40b, the laminated strip material 40b can always be accurately cut at the same position relative to the adhesive striped pattern.

Therefore, a highly accurate laminate for a honeycomb core can be manufactured continuously and easily.

Furthermore, in this device, two strip material coils 3
0 and 30a are set so that the unwinding directions are opposite to each other. This is because the strip material coils 30, 30a are usually formed by cutting a strip material coil into two that has been rolled and wound into a wide width. In other words, a wide strip material has a slightly different thickness between its ends and the center, resulting in a sheet camber, so if a coil of strip material cut into two is unwound in the same direction and stacked, the thickness will be slightly different. The differences accumulate. This difference in thickness is
When 800 strips of strip material are laminated, the number is about 4 to 8 strips, which has a negative effect on the quality of the honeycomb core laminate. However, in this device, the two strip-shaped material coils 30, 30a are set so that the unwinding directions are opposite to each other. Therefore, this difference in thickness is canceled out.

Further, the strip material 40, 40a unwound from the strip material coil 30, 30a has a winding curl, but as mentioned above, this winding curl in which the direction of unwinding is opposite cancels each other out, resulting in the unwinding. Does not adversely affect the quality of the rough honeycomb core laminate.

[Effects of the Invention] In the present invention, by employing the above-described configuration, the laminated strip material can always be precisely cut at the same position relative to the adhesive striped pattern, and the accuracy can be improved. A high laminate for a honeycomb core can be manufactured continuously and easily.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the manufacturing process according to an embodiment of the present invention, Figs. 2 and 3 are cross-sectional views of an example of applying adhesive to a strip-shaped material, and Figs. 4 to 6 show the shape of a honeycomb core. FIG. 10...Adhesive, 20, 20a...Strip material,
30, 30a...Strip material coil, 40, 40a
...Band-shaped material, 40b...Laminated band-shaped material, 40c
...Cut laminated strip material, 50,50a...
Application roll, 60, 60a...Adhesive, 70...
Dryer, 80...adhesive roll, 90...cutting roll, 100...vacuum belt, 110...lifting platform, 120a-120m...guiding roller, 13
0... Positioning roll, 140... Conveyance roller, 150, 150a... Sensor.

Claims (1)

[Scope of Claims] 1. Applying adhesive to one or both sides of a plurality of strip-shaped materials using separate application rolls in a striped pattern perpendicular to the moving direction of the materials, and applying adhesive along a predetermined route after application. A method of manufacturing a laminate for a honeycomb core by laminating a plurality of strip materials together, and cutting the laminate into predetermined lengths with a cutting roll, the coating interval of the coating roll and the cutting roll. A method for manufacturing a laminate for a honeycomb core, comprising: setting a ratio between the cutting interval and a cutting interval at an integer ratio, and setting a rotation ratio between the coating roll and the cutting roll at an integer ratio.