Title:
METHOD FOR MANUFACTURING MINERAL PLATE
Document Type and Number:
Japanese Patent JP2002144316
Kind Code:
A
Abstract:
To assure a freeze-than resistance of a mineral plate for building manufactured by an extrusion molding without depending upon excess coating.
A method for manufacturing a mineral plate comprises the steps of pressing down edges and its vicinity site of the mineral plate to be formed with a woodgrain groove part (2) later by cutting when a front surface of the extrusion molded mineral plate (1) is press molded by protrusions (4a) and (4b) of a mold (3), and allowing materials of pressed parts (5a) and (5b) to flow between the pressed parts to enhance a material density of the woodgrain groove part.
Inventors:
HONDA HIDETAKA
SHIMADA YUKIO
OKUMAE MARI
SHIMADA YUKIO
OKUMAE MARI
Application Number:
JP2000350209A
Publication Date:
May 21, 2002
Filing Date:
November 16, 2000
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
B28B3/20; B28B11/10; (IPC1-7): B28B11/10; B28B3/20
Attorney, Agent or Firm:
Toshio Nishizawa
Previous Patent: STATE FORM FOR GASKET OF WINDOW WITHOUT SASH FOR FORM FOR OUTER WALL PC BOARD
Next Patent: METHOD FOR MANUFACTURING MINERAL PLATE
Next Patent: METHOD FOR MANUFACTURING MINERAL PLATE