JPH0226730A - Honeycomb 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 Object of the Invention [Industrial Field of Application] The present invention relates to a honeycomb panel formed by fixing a honeycomb core and a face plate.

[Conventional technology] Honeycomb panels are a material with excellent properties such as lightness, rigidity, heat insulation, sound insulation, and energy absorption, so in recent years they have been used in a variety of fields such as transportation and construction. .

This type of honeycomb panel is made by laminating laminated materials such as plates made of a relatively soft metal such as aluminum or its alloy, metal foil such as aluminum foil or iron foil, or plastic sheets such as polyethylene or polypropylene. A honeycomb-shaped honeycomb core is formed by fixing plates or materials to each other at regular intervals with an adhesive or the like and stretching the thus constructed laminate in the thickness direction, and each material forming this laminate. both edges of
It was constructed by attaching face plates to the front and back surfaces of the honeycomb core using adhesive or the like.

By the way, as an improved version of such a honeycomb panel, the hollow part of the honeycomb core is filled with a synthetic resin foam to improve the heat insulation, sound insulation, and vibration damping properties of the core cells (see Japanese Utility Model Publication No. 61-30844). ``Sandwich panel'' (Japanese Patent Publication No. 1982-5901), and a honeycomb core filled with cement or the like to obtain fire resistance (``Fire-resistant honeycomb panel'' of Japanese Patent Publication No. 61-5901) have already been proposed.

[Problems to be Solved by the Invention] However, in order to increase the light weight and rigidity, which are the greatest advantages of these honeycomb panels, the face plate and honeycomb core have been made thinner, and the cell size of the honeycomb core has been roughly increased. However, for this reason, when a local load is applied to the face plate, the face plate tends to be locally deformed (i.e.

The problem was that the local load resistance was low. In addition, there was a problem in that when a foreign object collided, a dent was likely to remain (that is, a problem in which Punt resistance was low).

Furthermore, when these honeycomb panels are used in a corrosive atmosphere such as in a factory area or a coastal area, the surface of the face plate tends to corrode easily. Furthermore, when used in high temperature environments such as around vehicle engines and exhaust gas pipes, conventional products have had the problem of poor heat resistance.

In addition, honeycomb cores with a structure in which the hollow part of the honeycomb core is filled with a synthetic resin envelope have excellent heat and sound insulation properties, but are inferior to synthetic resin in terms of heat resistance, local load resistance, and punt resistance. This is no different from a honeycomb core not filled with resinous foam, and a structure in which a honeycomb core is filled with cement or the like has the problem of impairing the lightness, which is an inherent advantage of honeycomb panels.

The present invention has been made in view of the above-mentioned problems, and it is possible to improve local load resistance, punt resistance, heat resistance, and corrosion resistance without impairing the light weight and rigidity, which are the inherent advantages of honeycomb panels. The purpose is to provide honeycomb panels that can be used.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention has the following structure as a means for solving the above problems. That is, the honeycomb panel of the present invention is a honeycomb panel formed by fixing a honeycomb core and a face plate, and a ceramic material is welded to the face of the face plate opposite to the honeycomb core side. It is said that

[Function] In the honeycomb panel of the present invention configured as described above,
The ceramic material acts to cover the side of the face plate opposite to the honeycomb core side. This results in a honeycomb panel that reflects the high heat resistance, high corrosion resistance, and high hardness properties of ceramic materials.

Here, the ceramic material is, for example, alumina, titania, zirconia, etc., and its thickness is preferably 0.
．． It is better that it is 3 μm to 8 mm.

This is because if the thickness is less than 0.3L1m, the layer of ceramic material will not be uniform when welding it by melt cutting, many pores will occur, and corrosion resistance will decrease.
Furthermore, if the thickness is 8 mm or more, the weight increases and the advantage of honeycomb panels, which is weight reduction, cannot be achieved.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

Fig. 1 is a cutaway perspective view of a honeycomb panel according to a first embodiment of the present invention. The honeycomb core 3 is formed into a honeycomb shape with a cell size of 3/4 inch and a height of 12.7 mm, and the honeycomb core 3 is coated with a wax+4 layer 5 coated with a cladding ratio of 10%.
A lower plate 7 made of an aluminum plate (BA7PC) with a plate thickness of 1.2 mm is fixed to the back surface in the thickness direction of the
A lower plate 11 having the same shape and the same material as the lower plate 7 is fixed to the surface in the thickness direction of the honeycomb core 3 via a brazing material layer 9 coated with a cladding ratio of
and a ceramic layer 13 welded to the surface opposite to the honeycomb core 3 side.

Such a honeycomb panel 1 is manufactured by the procedure shown in FIG. 2, and the manufacturing method will be explained next. first,
A lower plate 7 and an upper plate 11 are respectively arranged on the back and front surfaces in the thickness direction of the honeycomb core 3, brazing metal layers 5 and 9 are arranged on these contact surfaces, and the brazing metal layers 5 and 9 are melted and cooled. By joining each member, a honeycomb core 3 with a bottom plate 7° and a top plate 11 fixed to it is manufactured (Step 1)
). Next, the surface of the top plate 11 opposite to the honeycomb core 3 side is polished by a method such as shot blasting to obtain a surface roughness Rm.
Obtain a clean surface of about 100Z with axlooos or R2 (Step 2). This is achieved by making the surface of the top plate 11 (the surface opposite to the honeycomb core 3 side) uneven.
The purpose is to improve the adhesion of the ceramic layer to be welded in the subsequent procedure, and the roughness is preferably as described above, but is not limited to this. Next, fine powder of ceramic (for example, alumina) is thermally sprayed onto the surface of the polished top plate 11 by a plasma method (a method using gas, a method using voltage application, etc.) is applied (procedure). 3) Cover the surface with ceramic layer 13 (step 4)
. The thickness of the sprayed ceramic layer 13 is 120 iLm in this example. Subsequently, the surface of this ceramic layer 13 is subjected to a flattening treatment in which it is ground and smoothed (step 5). In this way, the ceramic panel 1 is completed.

As detailed above, the honeycomb panel 1 of the first embodiment
In this case, the ceramic layer 13 is the honeycomb core 3 of the top plate 11.
It is welded to cover the opposite side. For this reason, the honeycomb panel has excellent local load resistance, Punto resistance, heat resistance, and corrosion resistance without impairing its original advantages of light weight and rigidity.

How the ceramic panel 1 of this example is excellent in local load resistance, punt resistance, and corrosion resistance will be explained below along with test results.

First, a local load test was conducted to test local load resistance.

In this test, as shown in Fig. 3, a round bar 2 with a diameter smaller than the cell size of the honeycomb core 3 (for example, 4 mm) is used.
1, attach the top plate 11 to the center of the cell of the honeycomb core 3.
The test results are shown in Table 1.The test results are shown in Table 1.The test results are shown in Table 1. In addition,
For comparison with conventional honeycomb panels, a honeycomb panel (double-sided plate 7゜1
1. The honeycomb core 3 was made of the same shape and material as in this example. ) test results are also shown in Table 1.

Table 1 (Number of tests: 5 times) In addition, a micro-Vickers test was conducted to test Punt resistance. The size and material of the honeycomb panel 1 used in this test are as follows.

Double-sided Jff17, 11: 1mm thick aluminum plate (
BA23PC) Honeycomb core 3: 0.2mm thick aluminum sheet (
BA23PC), cell size 3/4 inch, height 12.7mm Ceramic layer 13 (Example A) Titania with double thickness 80um.

Zirconia mixed material (Example B): Alumina with a thickness of 5 mm In the conventional sample, the ceramic layer 13 was not covered, and was the same size and material as the above-mentioned sample. The results of these tests are shown in the second section.

Second, dry and wet alternating immersion test and CA
An SS test was conducted. The dry and wet alternate immersion test is a 3% N
aC1 (soaked in PE (3) for 30 minutes at 40°C,
The specimen is exposed to hot air at 50°C for 30 minutes, and surface changes over time are then examined. In addition, the CASS test is a test defined by JISH8681, and is 4% NaC1.
+0.26g of QCuC12.2F (20 (PH3)) was continuously sprayed at 50°C, and the surface change over time was investigated.The size and material of the honeycomb panel 1 used in these tests were is as follows.

Double-sided plates 7, 11: Aluminum plate with a plate thickness of 1.2 mm (B
A7PC) Honeycomb core 3: Aluminum plate with a plate thickness of 0.14mm (
BA7PC), cell size 3/4 inch, height 12.7 mm Ceramic layer 13: Alumina with a thickness of 0.5 LLm.
The conventional sample is not coated with the ceramic layer 13, and has the same size and material as the above sample. The results of these tests are shown in Section 3.

Table 3 (Number of tests: 5 times) Therefore, it can be seen from these test results that the honeycomb panel 1 of this example is excellent in local load resistance, Punto resistance, and corrosion resistance.

In addition, in the above embodiment, the top plate 11 is made of ceramic i13.
However, depending on the case, the surface of the lower plate 7 opposite to the honeycomb core side may be further covered with a ceramic layer.

Further, the thickness of the top plate 11 to which the ceramic layer 13 is welded should preferably be 30 LLm or more if it is made of aluminum. This is because the face plate 11 is 30
This is because if it is thinner than um, the face plate 11 will melt due to the heat of the spraying when ceramic is to be coated by spraying, making it difficult to form the ceramic layer 13.

In this embodiment, the honeycomb core 3 and the top plate 11 are fixed together using a brazing material, but this is because the melting heat generated when forming the ceramic layer 13 deteriorates the fixing performance. This is to prevent This is because when the honeycomb core 3 and the top plate 11 are bonded using a resin adhesive, the bonded portion may melt due to the heat of cutting and the bonding performance may deteriorate. It is structured to connect the two.

Next, a second embodiment of the present invention will be described.

FIG. 4 is a front view of the honeycomb panel of the second embodiment. The difference between the honeycomb panel of this embodiment and the first embodiment is that the surface of the ceramic layer 13 coated on the bottom plate 11 is
In addition, Teflon (Du Pont7, a fluororesin)
The honeycomb core 3 and the bottom plate 7 are located at the processed point.
It is the same as the example. That is, in the honeycomb panel 31 of this embodiment, as in the first embodiment, the bottom plate 7 and the face plate 11 are fixed to both sides of the honeycomb core 3 in the thickness direction via the brazing material layer 5.9. , the surface of the top plate 11 opposite to the honeycomb core side is covered with a ceramic layer 13,
Moreover, the surface of the ceramic layer 13 is the Teflon layer 3
Covered by 3. In this example, the shapes of the honeycomb core 3, the lower plate 7, the upper plate 11, and the ceramic layer 13,
The material is the same as in the first embodiment, and the Teflon layer 33 has a thickness of 40 μm.

Honeycomb panel 31 of the second embodiment thus configured
As in the first embodiment, the material has excellent local load resistance and Punto resistance without impairing lightness and rigidity, and
Since the surface of the ceramic layer 13 is covered with the Teflon layer 33, it has better corrosion resistance, durability, heat resistance, weather resistance, and decorativeness (beauty) than the conventional one as well as compared to the first embodiment.
It is better in that respect.

Here, the honeycomb panel 31 of this example was also subjected to the dry and wet alternating immersion test and CA
An SS test was conducted. The test results are shown in Table 4.

4th test (5 tests) From these test results, the honeycomb panel 3 of this example
It can be seen that No. 1 has excellent corrosion resistance.

Further, compared to the first embodiment, the depth of pitting corrosion is 1/3 to 1/2 that of the conventional one due to the Teflon coating, and the corrosion resistance is more excellent.

Note that there is a conventional technique of coating an aluminum plate with Teflon, but in such a technique, it is necessary to bond both together via an adhesive brimer, whereas in this embodiment, the top plate 11 (aluminum plate ), the surface of the ceramic layer 13 that has been thermally sprayed and welded has appropriate irregularities 13a and holes 13b, as shown in FIG. This creates an anchoring effect (spike effect), and the Teflon layer 33 is firmly fixed without the need for adhesive brimers.

In the second embodiment, the surface of the ceramic layer 13 is coated with Teflon, but the same effects as in the second embodiment can be obtained even if the surface of the ceramic layer 13 is coated with an inorganic material instead of Teflon. Note that at this time, the inorganic material is directly applied to the top plate 11 of the aluminum by the ceramic layer 13.
Since aluminum does not come into contact with aluminum, there is no possibility that aluminum will be corroded by alkaline inorganic materials.

Although the embodiments of the present invention have been described in detail above, the present invention is not equally limited to the above embodiments, and can be implemented in various forms without departing from the gist of the present invention. Of course.

Effects of the Invention As detailed above, the honeycomb panel of the present invention has excellent gPJ load resistance, Punto resistance, heat resistance, and corrosion resistance without impairing the original advantages of honeycomb panels, such as lightness and rigidity. There is/

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of a honeycomb panel according to the first embodiment of the present invention, Fig. 2 is an explanatory diagram showing the manufacturing procedure of the honeycomb panel, and Fig. 3 is a local load test for testing the local load resistance of the honeycomb panel. FIG. 4 is a front view of the honeycomb panel of the second embodiment of the present invention, and FIG. 5 is an explanatory diagram for explaining the degree of adhesion of the Teflon layer of the honeycomb panel. . 1.31 Honeycomb panel 3 Honeycomb core 5.9 Brazing material layer 7 Bottom plate 11 Top plate 13...
・Ceramic layer 33...Teflon layer Agent: Tsutomu Sadatsu, patent attorney (and 2 others) Figure 4 Figure 5 Step 5 ↓ Figure 2 Step 1

Claims (1)

[Scope of Claims] A honeycomb panel formed by fixing a honeycomb core and a face plate, characterized in that a ceramic material is welded to the face of the face plate opposite to the honeycomb core side. panel.