Patent Number: 8,715,451

Title: Heat pressing apparatus with puncture prevention function and method for producing woody material

Abstract: [Problem to be Solved] When a wood raw material is heat-pressed in order to produce a woody material or woody board, steam is generated in an interior of the wood raw material. The heat-pressed wood raw material is then decompressed with the steam staying in the interior of the wood raw material. This causes a puncture or a rupture of the woody material. The puncture occurs in the last phase of the production process, thus spoiling the entire production process. In order to avoid the puncture, the wood raw material needs to be dried completely. This requires a large amount of energy. [Solution] In order to solve the foregoing problems, the present invention provides a heat pressing apparatus and a method for producing a woody material, the method including the steps of: (a): coating or spraying a bonding material on a wood raw material that is an aggregate composed of a single plate, a sheet-like article in which fibers are opened by a rolling, a thin stick-like article, a flake-like article, a strand-like article, and the like; (b): forming the wood raw material coated or sprayed with the bonding material in the step (a) into a specified shape; and (c): heat-pressing the wood raw material formed into the specified shape, while subjecting the wood raw material to degassing treatment to release the steam, which is generated and stays in the interior of the wood raw material, to the outside, thus to obtain the woody material.

Inventors: Korai; Hideaki (Tsukuba, JP), Sumida; Atsushi (Nagoya, JP), Osada; Takayoshi (Kakamigahara, JP), Yasuda; Osamu (Seki, JP), Tanaka; Keishi (Kakamigahara, JP)

Assignee: Forestry and Forest Products Research Institute

International Classification: B29C 65/00 (20060101); B31B 1/60 (20060101); B32B 37/00 (20060101); B30B 9/00 (20060101)

Expiration Date: 5/06/12018