JPH0411105B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a honeycomb structure, particularly a high-density honeycomb structure.

[Prior Art] The conventional method for manufacturing a honeycomb structure is to apply adhesive linearly on the surface of a long material sheet that is fed horizontally at equal intervals in the longitudinal direction along the width direction, and to apply adhesive to the surface of the material sheet. A first mark is attached to one end, and
A second mark is attached to the other end of the material sheet, shifted from the first mark by a half pitch of the adhesive application interval, and when the roll that feeds the material sheet finishes rotating the required number of times, a second mark is attached to the other end of the material sheet. The feed roll stops and shears the material sheet in the width direction via a photoelectric detector that detects the first mark, and when the re-rotated feed roll finishes rotating the required number of times, the second
The feed roll stops in the same way and shears the material sheet in the width direction through a photoelectric detector that detects the mark, and each sheet that is successively sheared is laminated and bonded by polymerization. Atsuta (see Special Publication No. 56-30184).

[Problems to be Solved by the Invention] In this conventional manufacturing method, a honeycomb structure is manufactured continuously and the length in the ribbon direction can be freely obtained. It had such problems.

a) Since the adhesive is applied using an adhesive application roll having a large number of protrusions on the surface, the adhesive may protrude or the adhesive application position may shift.

b. Due to strength considerations, the protrusions on the surface of the adhesive application roll cannot be made thinner than necessary, so the interval between applications of the adhesive cannot be made very narrow.

c For this reason, a high-density honeycomb structure cannot be manufactured.

d Therefore, the buckling strength of the honeycomb structure is low;
It cannot be used for members that require high strength.

[Means for Solving the Problems] The present invention aims to solve the various problems described above and provide a method for manufacturing a high-density honeycomb structure.

In order to achieve this objective, the method for manufacturing a honeycomb structure according to the present invention involves applying a first screen frame to the back side of one material sheet cut into a predetermined size, and applying adhesive at regular intervals at a predetermined pitch. A step of applying adhesive in a straight line to the surface of the other material sheet, a step of applying a second screen frame to the surface of the other material sheet and applying the adhesive in a straight line at equal intervals by shifting the pitch by half a pitch, It consists of a step of alternately laminating and polymerizing and bonding, and a step of polymerizing and bonding each material sheet and then stretching it to a required size.

Furthermore, if necessary, pressure or heat can be applied to ensure the adhesion of the sheets when the material sheets are alternately laminated and polymerized and bonded.

[Function] The method for manufacturing a honeycomb structure of the present invention uses a screen frame in which adhesive-permeable films are arranged at even intervals with extremely fine pitches to apply an adhesive to the surface of a material sheet. , the adhesive will not protrude or the adhesive application position will shift.

Furthermore, since the adhesive application interval can be made very narrow, it is possible to manufacture a honeycomb structure with extremely high density, that is, a honeycomb structure with a small cross-sectional shape of honeycomb cells.

Furthermore, it is also possible to construct a honeycomb sanderch panel by sandwiching the honeycomb structure produced in this way between panels in a sanderch shape.

[Example] An apparatus for carrying out the method for manufacturing a honeycomb structure of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 1, a large number of material sheets 1 cut into predetermined dimensions are stacked on a mounting table 2. As shown in FIG.
A feed roller 3 is arranged above the mounting table 2 to feed the material sheets one by one.

An adhesive application table 4 is arranged in series with the mounting table 2,
A screen frame 5 is placed above it. This screen frame has the same structure as that used in the screen printing method, except that the present invention uses an adhesive instead of ink. As shown in FIG. 2, this screen frame 5 is made by stretching cloth 6 such as silk, Tetoron, or nylon over a wooden frame, aluminum frame 7, etc., and the cloth 6 has predetermined pitches arranged at equal intervals. A large number of linear slits 8 are provided,
The adhesive is applied by the doctor 9 onto the material sheet through these slits. The slits of the second screen frame 11 are offset from the pitch of the slits 8 of the screen frame 5 by half a pitch.

The material sheet 1 sent out by the roller is placed on the adhesive application table 4, and the first screen frame 5 is applied to the surface of the sheet, so that the adhesive is applied in a straight line at regular intervals at a predetermined pitch. is applied to. The material sheet 1 coated with adhesive is delivered from the adhesive application table 4 to the sheet receiver 10. Subsequently, the next material sheet is sent onto the adhesive application table 4 by the feed roller 3, and the second screen frame 11 is applied to the surface of this material sheet, and the pitch and half of the screen frame 5 are adjusted. Adhesive is applied in a straight line at equal intervals with pitches shifted. The material sheet 1 coated with adhesive in this manner is sent from the adhesive application table 4 to the sheet receiver 10, and is laminated with the previous material sheet.

In this way, the material sheets are alternately stacked and bonded together within the sheet receiver 10. As shown in FIG. 3, in the stacked material sheets 1, the application position of the adhesive 12 is shifted by half a pitch from one sheet to another. Further, in order to promote adhesion, it is desirable to press the material sheets stacked in the sheet receiver 10 from above using a press member 13. Also, if necessary, heat can be applied to promote adhesion and increase bond strength.

Each of the material sheets polymerized and bonded in this manner is expanded to a required size to form a honeycomb structure 15.

If paper, especially kraft paper, Japanese paper, etc. is used as the material sheet, and glue is used as the adhesive, it can be used as a material for a humidity-retaining mask.

It is also possible to manufacture a honeycomb structure by using a sheet of plastic, aluminum, etc. as the material sheet and using a plastic or rubber adhesive.

Furthermore, the honeycomb structure 15 manufactured in this way can be sandwiched between panels 16 in a sandwich pattern with an adhesive layer interposed therebetween to form a honeycomb sandwich panel 17.

[Effects of the Invention] Since the method for manufacturing a honeycomb structure according to the present invention has an extremely simple configuration, it can be performed with fewer steps than conventional methods.

Furthermore, since the adhesive is applied using the screen frame, there is no fear that the adhesive will protrude or that the adhesive application position will shift.

Furthermore, since the interval between adhesive applications can be made very narrow, it is possible to manufacture a honeycomb structure with extremely high density, that is, a honeycomb structure with a small cross-sectional shape of honeycomb cells.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the manufacturing process of a honeycomb structure according to the present invention, FIG. 2 is a perspective view of a screen frame used in the method of the present invention, and FIG. 3 is a cross-sectional view of a honeycomb laminate produced according to the present invention. FIG. 4 is a perspective view of a honeycomb structure manufactured by the present invention expanded to the required dimensions, and FIG. 5 is a perspective view of a honeycomb sandwich panel constructed using the honeycomb structure manufactured by the method of the present invention. are shown respectively. 1...Material sheet, 3...Feed roller, 5, 11...
Screen frame, 9...Doctor, 10...Sheet holder,
15...honeycomb structure, 16...panel, 17...honeycomb sanderch panel.

Claims (1)

[Claims] 1. A process of applying a first screen frame to the surface of one material sheet cut to a predetermined size and linearly applying adhesive at equal intervals at a predetermined pitch; A step of applying a second screen frame to the surface and applying adhesive linearly at equal intervals by shifting the pitch by half a pitch, a step of alternately laminating each of the material sheets and polymerizing and adhering them, and each material. A method for manufacturing a honeycomb structure consisting of a process of polymerizing and bonding sheets and then expanding them to the required dimensions. 2. A method for producing a honeycomb sanderch panel by sandwiching the honeycomb structure produced by the method according to claim 1 between panels with an adhesive layer interposed therebetween.