KR19980074716A - Manufacturing method of high strength wood - Google Patents

Abstract

The present invention relates to a method of manufacturing high-strength wood obtained by artificially compressing and reducing the volume of mature natural wood without destroying the wood structure. By softening the cellulose and compressing it with hydraulic pressure when there is latent heat, the volume is reduced to 70% or more, so that high strength wood is obtained without destroying the wood structure, and thus the strength and hardness are improved by 30 times of the wood and the tensile strength of the wood is reduced. It is about 10 times higher.

Description

Manufacturing method of high strength wood

The present invention relates to a method for producing a high-strength wood by contracting to more than 70% of the original volume without destroying the wood structure by evaporating moisture and softening the cellulose tissue by exposing natural lumber to microwave will be.

Although there are many kinds of timber which is a sense of timber (材 木), the present invention has been invented a method of manufacturing high-strength wood by selecting pine trees with high economical value as a sample.

1 is an organization chart of pine tree

2 is an enlarged view of Cellulose tissue between conduits

Figure 3 is a cross-sectional tissue photograph of the pine before compression

Figure 4 is a cross-sectional tissue photograph of the compressed pine tree

5 is a cross-sectional tissue photograph restored the compressed pine tree

Explanation of symbols on the main parts of the drawings

1: conduit

2: Cellulose

The main components of pine are Cellulose, water in conduit and Resin. When water in Tracheids is removed, cavity is generated and the space occupies more than 70% of the whole wood. .

In addition, the wood is different from the conduit (1) structure of the late wood and early wood as shown in Figure 1 causes the strain caused by the difference in thermal expansion and contraction process during drying.

However, looking at the structure of the cellulose (2) it can be seen that the strain of the cellulose itself does not occur because it is placed homogeneously in the longitudinal axis and the transverse axis direction as shown in FIG.

In the pine tissue having such structural features, if the water molecules in the conduit (1) are completely removed and the cellulose (2) tissue is pressurized, the conduit disappears, so that the volume can be reduced to 70% or more. The same timber is made of aggregates.

Therefore, the compressed wood is made of stable structure, no deformation, and the strength and hardness is about 30 times higher strength than the wood before compression.

The present invention achieves the object of the invention by a method of compressing when there is a latent heat by evaporating the moisture and evaporating the moisture by exposing the wet wood to the microwave to realize this.

This will be described in more detail as follows.

1 is shown in the structure of a pine tree.

The present invention is humidified to a certain humidity by blocking the pine and exposed to microwaves forcibly drain the water in the conduit (1) and make the cellulose tissue flexible to compress the wood using a hydraulic press when the latent heat is inherent Shrink up to 70% or more to get high strength wood.

Compressing wood using this method results in the resonant vibration of water molecules in the wood under the action of microwaves, such as the free frequency of water molecules. The water vaporizes and vaporized water vapor is released to the outside through the cellulose tissue. It is dried without destroying the conduit (1) becomes a hollow wood, and the latent heat generated at this time transfers heat energy to the cellulose tissue and makes the cellulose (2) tissue forming the conduit wall wall flexible.

At this time, by applying a pressure of about 2.5 tons with a hydraulic press, the softened cellulose tissue is compressed while the conduit 1 is contracted to obtain compressed wood of the tissue as shown in FIG.

However, if the latent heat inside the wood disappears after the removal of water molecules by microwaves, the components of the cellulose are solidified and reconstituted, so the outer wall of the conduit is more powerful than the original one. A material of the desired strength and hardness cannot be obtained.

Therefore, the compression period should be done quickly when there is latent heat inside the wood, and it was effective to finish within 60 seconds.

When the compressed wood is made by this invention, the volume of the wood can be reduced by more than 70% compared to the volume of the wood, and once contracted, the deformation does not occur without external artificial manipulation, and the strength and hardness of the wood can be adjusted according to the degree of shrinkage. When it is contracted to the maximum, it can be improved about 30 times than the wood, and the tensile strength is about 10 times higher than the wood, and the internal structure of the wood is not destroyed at all (since it is deformed). 5), it has the effect of making practical timber suitable for the purpose, so that it can be usefully used as a new material in various industrial fields as well as building materials.

Claims (2)

By imposing a certain humidity by blocking pine and then exposing it to microwave for a certain time, it forcibly discharges moisture inside the wood and softens the cellulose tissue, compressing it with a hydraulic press (2.5ton) when the latent heat is inherent. Method for producing a high strength wood, which is produced by shrinking up to 70% or more. Microwave performance in paragraph 1 is the high strength condition that the lumber size is 7 × 5 × 5cm, humidity 100%, oscillation frequency 2450MHZ, microwave output 500W and the ability to vaporize wood through exposure for 5 minutes Method of making wood.