JP3135829B2 - Wood magnet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood magnet. More specifically, the present invention makes use of the characteristics of wood materials that are excellent in natural texture and color tone and also excellent in workability, and are also used in household wood products, electrical devices, information and communication devices, measuring devices, audio devices, and medical devices. The present invention relates to a new wood magnet useful in furniture products, nursing homes, childcare facilities, nursing homes, and other nursing homes.

[0002]

2. Description of the Related Art In recent years, with the development of wood processing technology and compounding technology, various processed woods such as plywood, laminated wood, particle board, etc. have been developed, and their performances such as strength, waterproofness and heat resistance have been developed. Are being improved. Also,
It has been practiced to mix wood flour with an adhesive and form it into products of various shapes. In addition, chemical treatment of wood has been used to modify wood and to add new functions to wood, and wood materials and the like that combine antistatic conductive materials have been developed. . With the development of such high value-added wood materials,
It is expected to provide useful functional wood-based materials that make use of the gentle texture and naturalness of wood.

In recent years, electronic devices and information communication devices such as personal computers and facsimile machines have been rapidly introduced into offices, schools, homes, and the like. Mutual electromagnetic interference has been regarded as a problem. From such a thing,
There is also a demand for the use of wood materials having new functions such as a radio wave absorption function and a magnetic shield function for home appliances and the like, furniture and walls.

However, as a material having magnetic properties so far, a magnetic metal such as iron or cobalt, or a ceramic material such as ferrite is generally used.
In the case of using these magnetic materials for furniture and the like, the fact is that they are hard to use, are inorganic, and make them feel cold, so they are not desirable materials. In such a situation, the inventor of the present invention has been diligently studying about imparting magnetic properties to a wooden material while utilizing characteristics of the wooden material. And as a result,
We have proposed a new technical possibility by manufacturing magnetic wood by impregnating and injecting wood with magnetic fluid.

[0005] However, in the examinations so far, since the end of the possibility of magnetic wood has just been pioneered, as a further technological development, for example, electromagnetic induction heating, electromagnetic shielding, etc. are possible. In fact, the development of a completely new magnetic wood material was strongly desired. Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and utilizes the warmth of wood materials and the gentle feel of the material while maintaining the characteristics of a hard magnetic material. It aims to provide magnets.

[0006]

SUMMARY OF THE INVENTION The present invention, as to solve the above problems, the first, providing a wood magnet, characterized in that the hard magnetic material powder is formed by molding together with the wood powder and resin I do. In addition, the present invention provides
Second, wood flour is hard in the dry state.
Wood magnet mixed with magnetic material powder and then molded
Third, the hard magnetic material powder is made of samarium-cobalt magnetic powder.
The present invention provides a wood magnet, which is a conductive material powder .

[0007]

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION There is no particular limitation on the type of wood material to be used in the present invention. Suitable wood materials such as natural wood, plywood, laminated wood, and even particle board can be used. used. For the hard magnetic powder, a liquid for dispersing the hard magnetic powder, and for the resin, any one of various types known so far can be used. Mixing, dispersing, injecting, and applying means may be selected depending on the use and the characteristics of the material, and these may be applied alone or in an appropriate combination. In addition, the injection may be performed under any of reduced pressure and increased pressure, and the woody magnet of the present invention can be obtained by these conventionally known materials and methods in these means and coating.

The woody magnet of the present invention has a lower specific gravity and lower thermal conductivity than conventional magnetic materials, can be easily processed by nailing, plane or saw, and is gentle as a wooden material. A wood magnet having the characteristics of a hard magnetic material can be produced while utilizing the feel of material and the feel of nature. The woody magnet of the present invention can have various shapes and magnetic properties. Also,
The magnet of the present invention can be used as a board having a magnetic attraction function by using it for a wall board or the like. Further, the board can be easily moved in a non-contact manner by applying an external magnetic field.

A composite magnetic wood material having a radio wave absorbing function or a magnetic shielding function can be manufactured. Hereinafter, the magnetic wood material of the present invention will be described in more detail with reference to examples.

[0011]

EXAMPLES As shown in Example Table 1, the amount of wood flour (Katsura material) and adhesive is constant, to produce a woody magnet powder of the hard magnetic material as a parameter. The amount of powder of the magnetic material is 5.0 g (48 wt.
%), 7.5 g (58 wt%), 10.0 g (65 wt%)
%), 12.5 (69 wt%), 15.0 g (73 wt%)
%).

[0012]

[Table 1]

More specifically, after the katsura is turned into wood flour, 8
It was dried in a thermostat at 0 ° C. for 5 hours to make it completely dry. This is because the powder of the hard magnetic material is easily oxidized, so that a change in characteristics after the production is prevented. Next, as shown in Table 1, 0.5 g of dried cinnamon material (particle size: 106 μm) and a samarium cobalt material (average particle size: 21 μm) as a hard magnetic material were used.
5.0 g of the powder of m) were mixed and stirred.

Next, a mixture of wood powder and hard magnetic material powder was added to the epoxy resin adhesive, and the main component of the epoxy resin adhesive and the curing agent were mixed and stirred. The total amount of the epoxy resin adhesive was 5 g. FIG. 1 of the accompanying drawings shows the shape and dimensions of a sample used for measuring the magnetization characteristics of the woody magnet and wood magnet of the present invention.

After the agitated material was placed in an acrylic pipe and pressed, the solidified sample was processed by a lathe into the shape and dimensions shown in FIG. The direct current magnetization characteristics of these samples were measured at a temperature of 22.4 ° C. using a vibrating sample magnetometer. The attached FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG.
Powder amount of hard magnetic material is 5.0 g, 7.5 g, 10.0
g, 12.5 g, and 15.0 g show the measurement results.

Further, the residual magnetic flux density, coercive force, and maximum energy product of each sample were measured. FIG. 7 of the accompanying drawings shows the relationship between the amount of powder of the hard magnetic material and the residual magnetic flux density. FIG. 8 shows the relationship between the amount of powder of the hard magnetic material and the coercive force. Further, FIG.
Shows the relationship between the amount of powder of the hard magnetic material and the maximum energy product.

From the above measurement results, it was found that the performance as a permanent magnet was improved as the ratio of the powder amount of the hard magnetic material was increased. For comparison, the characteristics and characteristics of a general rubber magnet and a plastic magnet as hard magnetic materials are shown in Table 2.

[0018]

[Table 2]

[0019]

According to the present invention, as described in detail above, it has a lower specific gravity than conventional permanent magnets, can be easily processed by nailing, plane or saw, and is a gentle material as a wood material. It is possible to produce a wood-based magnet or a wood-based magnet having the characteristics of a hard magnetic material while utilizing the feeling and natural feeling.

Further, according to the present invention, a radio wave absorbing function or a magnetic shielding function can be achieved by combining wood or wood material into which powder or fine particles of soft magnetic material has been injected and wood or wood material into which powder or fine particles of hard magnetic material have been injected. A composite magnetic wood or a composite magnetic wood characterized by having:

[Brief description of the drawings]

FIG. 1 is a diagram showing a sample shape and dimensions used for measuring magnetization characteristics of a woody magnet and a wood magnet of the present invention.

FIG. 2 is a diagram showing the results of measuring the DC magnetization characteristics of a wood-based magnet of the present invention prepared with a powder amount of a hard magnetic material of 5.0 g.

FIG. 3 is a diagram showing measurement results when the amount of powder is 7.5 g.

FIG. 4 is a diagram showing measurement results when the amount of powder is 10.0 g.

FIG. 5 is a diagram showing measurement results when the amount of powder is 12.5 g.

FIG. 6 is a diagram showing measurement results when the amount of powder is 15.0 g.

FIG. 7 is a diagram showing a relationship between a powder ratio of a hard magnetic material and a residual magnetic flux density.

FIG. 8 is a diagram showing a relationship between a powder ratio of a hard magnetic material and a coercive force.

FIG. 9 is a diagram showing a relationship between a powder ratio of a hard magnetic material and a maximum energy product.

Claims (3)

(57) [Claims] 1. A wood magnet, characterized in that the hard magnetic material powder is formed by molding also <br/> and wood powder and the resin. 2. A hard magnetic material powder when the wood powder is in a dry state.
2. The wood magnet of claim 1 which is mixed with the powder and then shaped.
stone. 3. The hard magnetic material powder is samarium cobalt.
3. The woody magnet according to claim 1, which is a magnetic material powder .