| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an extrusion molding die that can produce a ceramic-based plate having less possibility of occurrence of decrease in the appearance and performance due to the defective part.SOLUTION: Provided is an extrusion molding die for producing a ceramic-based plate having a core layer, and a skin layer provided on the surface thereof, by extrusion molding, comprising: a channel for distributing the molding material that forms the core layer; a channel for distributing the molding material that forms the skin layer; a merging zone for merging the channels; and an extrusion port for extruding the molding materials merged in the merging zone, and in the channels for distributing the molding material that forms the skin layer, there is formed an expanded portion 133 that allows the foreign matter lump that intermixed into the molding material, to escape from extrusion port.</p> |
