(57) An object of the present invention is to provide a die for extrusion-molding which
can manufacture a molded body efficiently at high speed, can allow the duration of
the die for extrusion molding to last for a long period, and in addition, can manufacture
a molded body without cracks, deformation and the like, and the die for extrusion-molding
in accordance with the present invention is a die for extrusion-molding comprising:
a molding groove part, a material supplying part, and an outer frame for fixing a
die main body which comprises the molding groove part and the material supplying part
to the front end of an extrusion-molding apparatus, wherein the die main body has
a form in which the plate-shaped molding groove part smaller than the material supplying
part is provided at almost the middle of the plate-shaped material supplying part
such that it protrudes from the material supplying part, the outer frame comprises:
a die holding part which is provided such that it covers the material supplying part
around the molding groove part; and a peripheral part which is provided near the die
holding part, and supposing that the thickness of the molding groove part is X, the
thickness of the material supplying part is Y, and the thickness of the die holding
part of the outer frame is Z, these X, Y and Z are allowed to satisfy the inequalities
(1) 3 ≤ X ≤ 6, (2) 5 ≤ Y ≤ 10, (3) 3.5 ≤ Z ≤ 8.5, (4) 0.8 < Y/X < 2.5, and (5) 1 <
Z/X < 2.
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