Method of producing molded elements with parts of different thicknesses from fibrous mixtures

Abstract

Abstract A molding method for producing especially plate-shaped elements each of which is provided with a flange or wall portion projecting form one or more of its lateral edges from a mixture of comminuted fibrous materials and a binder, preferable of hot-setting synthetic resins, wherein the part of the mold chamber in which the thin lateral wall portion or portions are molded has a considerably greater width than the final thickness of the wall portion and thus permits the molding mixture to be easily filled uniformly into the entire mold chamber. The mixture in the lateral downwardly projecting chamber part or parts is then first compressed by lateral, horizontally moving dies to the final thickness of the wall portions, whereupon several lower dies are moved independently of each other to press against the thin lower ends of the precompressed wall portions and against the lower side of the material in the main part of the mold chamber to compress the material in the entire mold chamber to the dimensions and shape of the final product.

Inventors

• 👤 E Munk

Bibliographic Details