JPS5954543A - Manufacture of honeycomb sandwich panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing Nicumsano German Tibanel using a powdered adhesive. The powdered adhesive is fused and the surface materials are combined and heat bonded.
- Concerning the manufacturing method of Nicumsan German Chibanel.

Conventionally, honeycomb sand inochinoku flannel is *! Take advantage of features such as long-lasting, flat surface and thermal insulation (~
It is widely used in aircraft, railway vehicles, building materials, office equipment, etc.

However, the manufacturing method of honeycomb sandwich panels in the prior art has many drawbacks, especially in terms of production speed and production cost.The main ones are listed below. It's something like this.

(1) Film adhesives are mainly used to bond the honeycomb core and face material.

Because the film adhesive is in film form, it is also applied to unnecessary parts that are not involved in adhesion of the honeycomb core, resulting in unnecessary use of adhesive and a reduction in vehicle volume, which hinders the lightweight feature of honeycomb sandwich panels. I appreciate the drawback of bringing one up. In addition, the film is unavoidably expensive due to its manufacturing process, and is often used together with release paper, which makes the film even more expensive and is wasted, leading to an increase in the cost of the honeycomb sandwich panel. 'i,:'FW-V6゜Also, in order to improve the adhesion between the film and the 1hj material, the i771s of the panel forming equipment is used, and the A-=tokray---no is often used for 1L ( This makes the production of 4 culms complicated and reduces productivity.

(21 Hanica A 1 A and paste adhesive instead of film adhesive for adhesion!) Also, the frequently used hebabase adhesive is usually 7"5 cans applied to the entire surface of ini, 1', l. It is used in vain like the film form.
It's a drawback that it brings about the destruction.

Haste-like adhesive is applied to the honeycomb core cell edge.
However, if a misalignment occurs during any alignment, the adhesive may be removed and adhesive defects may occur.

(3) The honeycomb core is composed of an aggregate of hexagonal tubular bodies as shown in Fig. Therefore, it is not made from materials such as metal or plastic.
) The bonding area at the contact points such as surface area is small and therefore it is difficult to obtain sufficient bonding strength, increasing the strength. By widening the joint area 'i
(Increase) Jll (This phenomenon can be explained as h t,t,':
Title.

In Figure 6, a) 2゛ indicates the state of 1. ).Efforts are being made to ensure that

Therefore, for example (, r, in the case of adhesive cutting, the thickness is the same as the normal surface adhesive (〕 is the thickness, and the evening is I t) Fjμ
m! +! Pi'T51 as a adhesive for Herkamlino Germany panel, whereas the temperature is 4).
', iii' 2 [1[,] -4 A thick film of the former μ is used.

This means that the disadvantages of Section 111 (1) and the 1N series; In addition, even though there is only a small number of adhesive surfaces (1), adhesive strength is required, and (a) the adhesive that can be used is also subject to severe restrictions (7).

(4) Also, face material, ', L'C-ventilation f1-4・su,
If required or if a perforated plate is used
For v, it is difficult to use glue-like adhesives, and it is difficult to use forcefully.
On the other hand, since powdered adhesives are in powder form, there are some problems during construction, such as measures to manage and collect powder particles, but on the other hand, they are low cost. It can be produced in

1. There is little variation in quality and it can be applied to materials of various shapes. /) It has 7 features. In particular, adhesives and adhesives are rapidly growing due to advances in 1'brication technology, such as coating technology using static electricity. For example, powdered adhesives are the mainstream adhesive for clothing interlining, and even in other technical fields, they are considered to be able to comply with bath additive regulations to prevent public fraud. However, powdered adhesives that are solid at room temperature usually have a high molecular weight (i), so their viscosity when melted is high, and it is difficult for them to sufficiently "stick" to the metal surface under E force. Barcam core with extremely thin foil J9 For example, if made of aluminum, usually +
[ ] The cut surface of the cell edge of a honeycomb core of about 100μ has a very small cross-sectional area, and the powdered adhesive applied only to it is made to protrude by J Cover-'4 So-called Soi 1
It is extremely difficult to express the viscosity of the fillet (i'Jg) due to its viscosity, surface tension,
Adhesive IF! jWi:, Vr: A-+L A phenomenon involving complex factors F, I) There are many inner edges 9:'
(It is a very important problem in the production of honeycomb leaves in Germany, where much effort is being made.)
The present inventors have also earnestly studied this problem.
As a result, the adhesive or adhesive is applied in the direction perpendicular to the cell edge cut surface and (-) cross section, that is, in the direction of The honeycomb core is then coated with powdered ``IJζ adhesive'' or adhesive. :, &<Insensitive powder adhesive (J is applied to the fused surface (, 1 was used to form a panel, and a sufficient fillet was easily obtained.) Nikamyano Germany The present invention was completed after discovering that this could be achieved.

That is, the present invention applies viscosity 14IJ or glue cutting from the cell &W and end faces of the honeycomb core in the core thickness direction.7. A honeycomb core to which a powdered adhesive is attached using the pressure-sensitive adhesive or adhesive is laminated with a face material which is fixed by J'L fusion and heated by applying the powdered adhesive.
4) Honeycomb zag, dough, and sochibanel are characterized by the following characteristics:

The powdered adhesive used in the present invention is advantageous in that it exhibits its effect even in a small amount on one side, and is suitable for use on the core. (Even if you add up the amount to
, 111'', which requires only a fraction of the amount of adhesive used in the past, and can be done without the light ashing of Hanikano, Tsu 5 / Deisotibanel. be.

The manufacturing method of the present invention is described in detail as follows.

(1) A step of coating the cut surface of the honeycomb cell edge with an adhesive or an adhesive, and also coating it from the cut surface in the thickness direction of the honeycomb core. (2) Applying powder to the viscous scraping or contact area where the 7# agent is applied. Step (3) of attaching a shaped adhesive, and further, if desired, melting the powdered adhesive All) by heating and melting to solidify γ.
Then, apply powdered adhesive to ('-L) and fix the fused) meter.
(4) Apply the powdered adhesive to
Alternatively, the fused and rotated honeycomb r and the powdered adhesive are fused and fixed. 11. The face is smoothed, and the surface is thermally bonded with 11 force to form a panel. 4) Powdered adhesive used in the present invention. [7] Thermoplastic t1.1 IJl resin, thermosetting tl: resin 11"ff, and a mixture of both. 4) Composite type 11" Ij resin can be applied. (For v1 fat and +7, polyamito-holyto-still, ethylene-drinking picobomaly-t+; yohiso-keno compound, ethylene-ethyl acrylate cobolene, polyvinyl boular, etc. are mentioned, and these η1 Fat is +1 (nowadays you can get it in powder form,
After polymerization, it can be easily pulverized by mechanical pulverization by freezing pulverization or other means, or by precipitation from a liquid solution, etc.;
Thermosetting wood 11t'r and 2 are epoxy wood 11tono: L-nor 4! ＞J IIt7, polyester resin, 12411th place, 1st fat, etc., are mainly composed of (-7, hardened powder and supernatant, both of which are melt-blended and then ground (~ Alternatively, it can be obtained by a method such as grinding the two bars separately and then triblending.

Powdered adhesives that are particularly suitable for the application of honeycomb 1 non-German chino flannel are so-called composite adhesives consisting of a mixture of thermoplastic resin and thermosetting resin. ;) Ru.

Examples of such adhesives include nylon-epoxy, nylon-phenol, polyester-7I mix, silicone epoxy, phenolic nitrile, phenolic nitrile, and phenolic phenolic. The manufacturing method for the adhesive can be the thermoplastic resin or thermosetting resin (equivalent to and compatible with the above), but the best method should be selected taking into consideration the required adhesive state, adhesive conditions, etc. ) can be done. Contact 5I' containing thermosetting resin
When the i agent 1 is fused σ) The crosslinking reaction proceeds by heating etc. [2,
Adhesion] In the second stage, the performance could not be fully expressed (・iiJ performance haha).

In order to prevent this phenomenon, the temperature is set to 16% during fusion and fixation.
It is necessary to set moderate bonding conditions by controlling the heating time and heating time. For example, in the case of epoxy resin, set the fusion conditions to 13-stage (14)
As a result, a strong (= J contact force of 7t, both Rudo and
Adhesion conditions H, '+A degree or time, etc. conditions are mild +L
You can get the benefits of I-C-giru etc.

In the present invention, powdered contact layer? Overturn 7・-Nikano・：
The following adhesives or adhesives can be used to add +1 o'f to Noah.3. Various types of adhesives such as acrylic, vinyl, inno, etc. have recently been developed, including hotmel and reactive adhesives.
Teorikosai 1. You can use both [゛・. Comb thread viscous cutting 1rlF-natural: JJ1.81! R and endogenous: 4, based on J' A, etc., modified to partially crosslink, etc. 3 (re-(ii,) 1, acrylic adhesive r
i11 is lli i 11h with carft number 2-1
hK Norkol Acrylic Acid-L Suguru Juji 1) Masaru・
Lord 14. and 1. Various types of agate are commercially available. , hot melt type viscous '4'
r-cock co-j1 (coalescence, poly-r-mide, poly-lr-sudeno (・o, and -r-cryl ``β-L sural Kyodo Kyodo combination base and Shimodo θ-)'' In addition to these, urethane-based, SIJ core yarn, polyvinylethylnydeno
/ system, j-;% xy system, etc.4). As an adhesive, powdered adhesive is applied while it is tacky after being applied, so it can maintain an appropriate level of tackiness and retain its tackiness. Something that cannot be lost is suitable. As this adhesive, commercially available adhesives such as epoxy, urethane, acrylic, rubber, polyamide, and acrylic/9C adhesives can be used in the form of base, liquid bath, and emulsion threads. reactor.

Among the glue and glue, it is easy to stick
It is desirable that the powdered adhesive does not prevent the film of the melted powdered adhesive from forming when it is bonded by heating.
Adhesives made of tk1 fat are preferred. Furthermore, even if the bath salts etc. evaporate after application, the adhesive will remain sticky.
Since +, is always maintained, there is a large degree of freedom in combination with machining and (f-), which is preferable.

To further explain the manufacturing method of the present invention, the method for applying the adhesive or adhesive to the cell end faces and the thickness direction of the core can be easily carried out by a method such as applying a rubber L)-ru to the filtrate. possible). 7. Attach powdered adhesive to the honeycomb core coated with adhesive or adhesive; ) The method is as follows:
During the process of passing the honeycomb Jf through the id in a plane (conveying section 4), powdered adhesive is continuously sprayed from a mesh roll type spreader at a predetermined tjJ) to coat the adhesive or adhesive application area. 3. Also, by applying a powdered adhesive to a predetermined thickness and applying a sticky agent or adhesive to a flat plate, the honeycomb core is layered, using the principle of transfer. ...The cam core 91 can be uniformly neat 4).

In the case of fixing the powdered adhesive to the no-ka core by thermal fusion, a conventional hot air circulation furnace, far-infrared heater, high-frequency induction heating, etc. can be used.7. ). This is a sticky method in which the powder is formed into a film by fusion.

The coating thickness of the adhesive or adhesive is determined by its adhesion retention 11;
Powdered adhesive firmness〉 ;) t, J7: It is determined taking into consideration the strength of the panel after m, but usually, 1
-300μ, preferably 1-100μ.

Adhesive 7" ill or application of adhesive tlJiX-/・Constituting the Nicum core 7.) It is desirable to apply 1- to the foil J9 or higher. If the riJ is less than the foil thickness, sufficient fillet properties cannot be obtained. The strength performance as a panel is low F. Even if it is applied to more than 20 times the foil thickness, the strength U
There is no P, and the use of 1ij of adhesive simply increases and is wasted, and the panel's 1l (jπ increases and costs increase/
Good money.

Application of powder adhesive jt1 is 60/W to 20[]0/W9/ for Nicum Neer (Cellsize W Ho)
m, preferably 200/W to I 600/Wg/
m′.

Furthermore, the temperature conditions when heat-sealing the powdered adhesive vary depending on the adhesive AI agent, welding agent, and powdered adhesive lees used for the first garment. Usually 8 (
) to -200"C.In the process of applying the powdered adhesive, apply the powdered adhesive to the bending material.
11 How to get cold cloth? r4′! 1z method can be applied, for example, mesh roll type spraying (spraying method using zigzag, etc.), static image (gun type, fluidized tank type, etc.), electrostatic coating method (using p-loading machine), and screen printing plate (4). ) Screen coating method etc. 4). Powder contact coating on curved material (amount of coating for cutting is 1
1/ni” or more, preferably 5 to 5[, 1g/75
Good (, below 2,97m7, old to cell edge: If
If the L-type adhesive wets the surface H well during heat bonding (it has poor ability to form a strong soilet, and if the adhesive is applied more than 7g/m7, it may be necessary to apply 4. +ri
'J is painted 1i-3-ru 1 floor is vomiting, small is panel 11 (Ifl increases and 7e4),,■(]-L
As mentioned above, the method is as follows: [3(]''' Heat to 11°C, or preheat to 1°C or 801G.

The condition for combining the bending material with the curved material and making it into a funnel is -1 is the material 'l'1. h knee + o depending on 1-V'R of Igj abrasion.

−3() U ”C, (1) Warm IKU U, I −1(
] It is best to carry out under pressure conditions of kg/i. Panel f
Multi-stage presses, autoclaves, presses, presses, etc. equipped with heat equipment can be used depending on the purpose.

As stated above, the present invention is directed to
It consists of the steps of 4), and from such steps /,,C
Due to the manufacturing method of the present invention, the inertia is reduced by 1 () for the first time.

Furthermore, according to the manufacturing method of the present invention, in the manufacturing method of honeycomb sand isodipapuru, which is generally used in In, the following characteristics can be obtained: Welding and fixing powdered adhesive without affecting the shape etc. 1-2 I
The culm makes it possible to secure the fit of the adhesive, and also prevents the powder from falling off when forming panels, making it easier to handle and preventing adhesive defects (easily sandwiched). This is what makes Bai Le 14!,) +-+J north.

When carrying out the present invention, the honeycomb core is expanded in advance, and then the adhesive and powder bonding process is performed. f
It is preferable to apply /'I'l meeting' and fix '1-'. Before spreading (when the adhesive of J'l et al. is applied 1-, the strength of the adhesive itself) 1) It becomes impossible to spread within ξ, or the adhesive layer 1j enters between the cores and a contact force occurs. There is a risk that troubles such as failure to expand due to 1 to 1) may occur.

After the expansion, the process of the present invention was carried out without causing such troubles, and the continuous production of German Chibanel became the 1st floor.71.
).

Here, the methods for manufacturing the honeycomb length and one-piece panels of the present invention are listed below.

(1) A high-strength honeycomb sandwich panel can be manufactured with a small amount of 1", leading to reductions in length and length and cost.

(2) When aligning the honeycomb core and surface
The occurrence of a contact defect due to the misalignment of the plane U can be corrected).

(3) A perforated plate or Jliil τ is diluted with water. 1) u
Applicable to II materials! I- can do it.

(4) Applying a transparent surface - 17:) It is possible to improve the beauty, transparency, and decorativeness of the panel.) It is suitable for the field of use.

(5) Since the adhesive is used in fewer ways, it is possible to prevent core breakage and buckling due to pressure inside the core due to foaming and scum generation during heat bonding. (6) Powdered adhesive Because it is fused and fixed to the core in advance, it is easy to position when aligning the surface H and the core, making it difficult to perform continuous production using roll presses, belt presses, etc., resulting in high productivity and low productivity. Be sure to secure the cost.

(7) High adhesion reliability τF, durability etc. t4'-
3. (8) A surface with a very small edge of powdery adhesion melted.
Compared to applying adhesive only to the cell edge, the adhesive strength deteriorates (even with the same amount of adhesive used), and even if there is a miscoat of mmAl1 at the cell edge, the adhesion is still as good as it can be. Light II 2.'
It has highly reliable adhesive properties.

As is clear from the above description, the present invention provides a method for producing honeycomb sandwich panels at low cost, and further promoting the reduction of honeycomb sandwich panels, which is the maximum length of 4 yen. It is something to do.

The present invention will be further explained below using Examples.

Example 1 Foil thickness 50 μ, dimension 400 W × 6001 × 10%,
Cell size 1/4 inch moon quality JISH40rJOA-5
Acrylic adhesive 11 Aron Tack S-
2080 (manufactured by Toagosei Chemical Industry Co., Ltd.) was rolled neatly.

Next, a nylon-based powder adhesive FS-1751' (manufactured by Toagosei Chemical Industry Co., Ltd.) was continuously sprayed using a mesh roll type sprayer equipped with static electricity removal equipment, so that it adhered to the adhesive scraping application area (=j). The powdered adhesive was applied evenly and evenly to Celco and Soji, and it did not come off or fall due to vibration during handling or blowing.Subsequently, it was heated in a hot air circulation oven at 150℃. For 10 minutes, 1lfl powdered contact agent 11 was fused and fixed, and the powdered contact agent obtained in 7', -9 was fixed at 100%. ■4.It has a bright appearance and the thickness of the adhesive layer 5 becomes clear after the first moxibustion)
'7) When cutting the fy ts honeycomb gore, the adhesive does not def; due to i loading, etc., and the adhesiveness is also 51-all &(-
Disappearance 1 - It is easy to handle and suitable for industrial production.
It turned out that I was L/.

Thickness 0.6-O method 401) X 613 [゛ to 1)
'Luminy Uno, Board (J I S 114 D D D
A 105 CI P) to the above 1”S-17S
P was spread using a mesh 1-]-le type spraying method to the thickness shown in Table 1, and the mixture was passed through a hot air circulation oven at 151 J°C for 10 minutes to fuse the adhesive. Adjust the weight to both sides of the core and apply LL force 3 l using a heat press set at +80”C.
<g/* for b minutes〃11 passionate orgasms/, 2,.

The cooling layer Burnell had a good QF appearance.

The panel was cut into a size of 50 x 50-10'L, fixed to a jig using ebony/based adhesive cutting, and then tested according to US Army inspection standards (MI
A tensile test was carried out at 25° C. at a tensile rate of 10 min/min according to L-・A-25463).

Table 1□ Fillet quality: 7 (Top)', 5', 50 2u
・ 21 Defective ＼- ＼- ~\No Experiment numbers 2 to 6 are actual ATs of the present invention (i 1Plj-(:
1 and 1 are comparative examples with the present invention.

Example In Example 1, dog-(a) Thread powdered contact cutting'F
S-+ 75 J'θ) Instead, use epoxy powder adhesive cutting AP-! 5 [)(] (manufactured by Totun Synthetic Chemical Company): Same as Example 1 (Experiment 717 No. 1) except for 1~
1 to row 1 Tsutare-Kanorat Soizu tensile strength jl: c & T-1
66k, 9/: It's only one.

□ 11th Example L Craft paper is collected and 1' 6 □-・Kuno・Nikamu J1□ 71 (Dense 110.(l l 9
g/crd, -1-, JL, size 25%, ;((”
Both cells J- of method 100 to Vxl O [I Rx 25'4): 1 in the direction of the thickness of the edge bend and the
Glue the overnight epoxy thread to a depth of about 20 μm and apply a small cloth with an average thickness of about 20 μm, followed by epoxy and powder adhesive.
3 A P-Ei Ol) with the stub method
- Tsuji ni I"i it rsamoritaL ("j' :tr
``ilj 40,']/yu') its f! fusion, a
-J-ru・-donna (same as Example 2 (, = J7 and adjusted I ~ Aluminum fused with powder soft welding S tension + 1 river +) and 11
i combination) (, +8 [pressure t with a heat press set at 1°C]
, 3 kg/d for 1 minute. The panel has a good appearance after cooling and a flatwise tensile strength of 1
It was good at 0.51~g/ca.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of Nicumnino'. Fig. 2 is a sectional view taken along line AA' of the Nicum core with the powdered adhesive fused. A-A" cross-sectional view of the honeycomb core and bent material (only one side shown). 1. Honeycomb core 2, powdered adhesive 2, 4) Powdered adhesive 6, face material 4, powdered adhesive pre-coated on face material Patent applicant's name: Toagosei Kagaku Kogyo Co., Ltd.

Claims (1)

[Claims] 1. A honeycomb core in which an adhesive or adhesive is applied to the cell end faces and end faces of the honeycomb core in the thickness direction of the core, and a powdered adhesive is attached using the adhesive or adhesive;
A method for producing a tossed honeycomb sandwich panel, which is characterized by laminating and heating bonding a surface fused with a powdered adhesive.