A resin molding device, resin molding method and resin molded product capable
of
guiding a sink to an optional position to perform a precise molding. A resin molding
metal mold includes a gate formed in the central part of a cavity, a stepped part
increasing the opening diameter of the cavity in the circumferential direction
orthogonal to the flowing direction of a molten resin introduced into the cavity
from the gate, and a fine outside air inlet part circumferentially formed on the
outer part from the stepped part. The outside air inlet part is formed of a porous
material and allowed to communicate with the outside of the resin molding metal
mold through a communicating passage. Accordingly, the molten resin injected into
the cavity from the gate is cooled with the outside air introduced from the outside
air inlet part formed in the area except a transfer part after the reduction in
resin pressure by the stepped part to generate a sink, forming a non-transfer part,
so that the transfer property of the transfer part can be improved to enhance the
shape precision of the molded product.
