JPH0419101A - Manufacture of building board - Google Patents

Abstract

PURPOSE:To contrive an improvement in yield by avoiding generation of a part which is incapable of using by a difference in heights, by a method wherein a bottom end side and tip end of material wood veneers are laminated so that they are mixed up with each other at one end side of flitch. CONSTITUTION:At the time when flitch is obtained by laminating and sticking a large number of material wood veneers 1, which are clamped by a press, a bottom end side of a material wood veneer 1 becoming a root side of material wood and a tip end side which is on the opposite side of the bottom end side are mixed up with each other at one end side of the flitch at the rate, for example, of about 1:1. The mixing like this may be performed alternately one sheet at a time or by making a plurality of sheets into unit or the same may be performed at random. With this construction, since the one end side and the other end side of the flitch 2 are flush with each other after lamination and clamping, yield can be improved by avoiding generation of a nonusable part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a method for manufacturing building boards, and more specifically to a technique for improving yield in a flitch manufacturing method.

E. Prior Art] Conventionally, as shown in Fig. 2, the above-mentioned flitch 2 is manufactured in a method of manufacturing a building board like artificial precious wood by thinly slicing a 79 piece 2 made by laminating and bonding a large number of wood veneers 1. However, wood veneers 1 of various materials having a thickness of about 0.5 to 3.0 mm are laminated and bonded and pressed. The wood veneer 1 is laminated such that the base end side of the wood base and the end side opposite to the base side are aligned at one end side of the flitch 2.

[Problem to be Solved by the Invention 1] However, as shown in FIG. Due to differences in physical properties between the base and end sides, especially the hardness, rigidity, compressive Young's modulus, and bending Young's modulus of the wood, differences in height occur in the laminated and pressed flitch 2, which means that it is not durable. Therefore, the part that has become a bird, that is, the part M above the virtual ML in Figure 2 becomes an unusable part and is discarded, and the yield is poor. When we measured the compressive Young's modulus of an AC veneer obtained by rotary slicing from the same wood species and decolorizing and drying it, we found that the compressive Young's modulus was as follows: It turned out that there is a difference.

Sampling from 1980 to 1981 Log length: 4- Moisture content: Humidity adjusted to 20±3% The present invention was made in view of these problems.
The purpose is to provide a method for weaving building boards that does not cause differences in thickness after lamination and compaction and can improve the yield in the flitch manufacturing method.

[Means for solving the problem 1 Il: The IL method of the building board of the present invention involves thinly slicing a flitch 2 made by laminating and bonding a large number of wood veneers 1! In order to manufacture the above-mentioned flitch 2 in the method of manufacturing a strip board, the base side and the end side of the wood veneer 1 are connected to the flitch 2.
It is characterized by being stacked so that they are mixed at one end side.

[Function J] In this way, in the method of manufacturing a building board by thinly slicing the flitch 2 in which a large number of wood veneers 1 are laminated and bonded, the base side of the material wood veneer 1 is used to manufacture the flitch 2. By stacking the flitch 2 such that the base side and the end side are mixed at one end side of the flitch 2, the base side and the end side of the wood veneer 1 are mixed at one end side of the flitch 2,
After stacking and compacting, one end side and the other end side of the flitch 2 do not have different heights, and the yield is improved by avoiding the occurrence of unusable parts due to different heights. It is something.

[Example] Embodiments of the present invention will be described in detail below based on the drawings.

A rotary slice (not shown) is obtained by continuously slicing raw wood with a cutter such as a rotary lace, and the raw wood is cut into appropriate lengths, or the raw wood is sliced thinly to obtain the material wood veneer 1.

A large number of such material wood veneers 1 are laminated and bonded and pressed together using a press to obtain a flitch 2. After curing and drying, such a flitch 2 is sliced into a building board like an artificial precious wood (not shown). ).

When manufacturing such a flitch 2, the base end side of the material wood veneer 1, which will be the base side of the raw wood, and the end end side on the opposite side are mixed at a ratio of approximately 1:1 at one end side of the 79 flitch 2. It is. Such a mixture may be done by alternating one sheet at a time, or by alternating a plurality of sheets at a time, or by mixing two or more sheets.

In this way, by stacking the material wood veneer 1 such that the base end side and the end end side are mixed at one end side of the flitch 2, the base end side of the material wood veneer board 1 is stacked at one end side of the flitch 2. There is no difference in the ^ of one end of 79 Tsuchi 2 and the other jlIIIll after lamination pressing, and the generation of unused parts due to the difference in ^ can be avoided. It improves staying power.

[Comparative Example 1 The base end and end end were aligned and the thickness was 1. When 4 lengths of Ol' AG material veneer were pressed and laminated under a pressure of 15 kg/cm'', 10 flitches were created and the variation in the thickness of the flitch in the direction of the parishioners was measured to be 6°3. %Met.

[Specific Example 1] The same flitch as above was created by alternately mixing the base end side and the end end side, and the variation in the thickness of the flitch in the direction of the parishioners was measured and found to be 0.9%.

In addition, in the method of manufacturing parallel plywood according to the present invention, in order to laminate the material wood veneers 1, the base side and the end side thereof are mixed at one end side of the parallel plywood, and the laminated adhesive is bonded and pressed. Alternatively, the building board may be obtained by pressing the board. In such a case, it is better to have less variation in the thickness of the building boards when performing secondary processing, so that they can be evaluated as a valuable product.

[Effect of the Invention 1] In short, the present invention provides a method for manufacturing building boards by thinly slicing a flitch made by laminating and bonding a large number of wood veneers. Since the end side of the flitch and the end side of the flitch are mixed together at one end side of the flitch, the base side and the end side of the material wood veneer are mixed at one end side of the flitch, and after stacking and pressing, the one end side of the flitch and the other end side of the flitch are mixed. There is no difference in shape between the end sides, and there is an advantage that the yield can be improved by avoiding the occurrence of unusable parts due to the difference in shape.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a side view of a conventional example, where 1 is a wood veneer and 2 is a flitch. Agent Patent Attorney Ishi 1) Ai Figure 7 2

Claims (1)

[Claims] (1) In the method of manufacturing building boards by thinly slicing a flitch made by laminating and bonding a large number of wood veneers, the base side and the end side of the material wood veneer are separated from each other in the flitch. A method for manufacturing building boards, characterized by laminating them so that they are mixed on one end side.