Building material manufacturing apparatus and building material manufacturing method

Abstract

A building material manufacturing apparatus includes a sieve portionand a receiverthat receives a building raw material M that has passed through the meshes of the sieve portion. The sieve portionincludes a series of sheets that are each capable of performing a wave motion when the apparatus is operating, that have an inclination, and that are arranged in a direction of the inclination. The series of sheets include a sieve sheetand a sieve sheetpositioned below the sieve sheet. In the sieve sheet, meshes having an identical size are arranged at a regular pitch in a sheet width direction W. In the sieve sheet, meshes having two or more different sizes are arranged or a mesh region Rand a non-mesh region Rare arranged, in the sheet width direction W. The receiveris movable below the series of sheets. The building material manufacturing method includes, by using the apparatus, forming a mat on the receiver, the mat including a first layer formed from a part of the building raw material M that has passed through the meshes of the sieve sheetand a second layer formed from a part of the building raw material M that has passed through the meshes of the sieve sheet