| CPC B29C 48/345 (2019.02) [B29B 9/10 (2013.01); B29C 48/3003 (2019.02); B29C 48/865 (2019.02); B29B 9/06 (2013.01)] | 16 Claims |
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1. A die plate comprising:
a nozzle group including a plurality of nozzles that each discharge molten resin in an axial direction; and
at least one heating medium guidance part that receives a heating medium, guides the heating medium, and heats the plurality of nozzles from outside,
wherein the plurality of nozzles includes:
a plurality of nozzle walls each extending in the axial direction and including an inner peripheral surface surrounding a resin channel that allows the molten resin to flow, and an outer peripheral surface arranged along the inner peripheral surface to surround the inner peripheral surface in a cross section orthogonal to the axial direction; and
a plurality of discharge parts arranged at tips of the plurality of nozzle walls in the axial direction and each discharging the molten resin, and
the at least one heating medium guidance part includes:
at least one reception port that receives the heating medium;
at least one discharge port that discharges the heating medium; and
at least one guidance wall that defines a heating channel through which the heating medium flows together with the outer peripheral surface of each of the plurality of nozzle walls, the at least one guidance wall guiding the heating medium to cause the heating medium flowing in from the at least one reception port to come into contact with the outer peripheral surface of each of the plurality of nozzle walls in a flow direction of the heating medium crossing the axial direction, and then to be discharged from the at least one discharge port;
wherein the plurality of nozzles includes a plurality of independent nozzles, and each respective one of the plurality of nozzle walls of the plurality of independent nozzles is arranged independently of each other inside the heating channel such that its outer peripheral surface is separate from the outer peripheral surface of adjacent ones of the plurality of independent nozzles, and the heating medium flows between the adjacent ones of the plurality of independent nozzles; and
wherein the plurality of nozzles includes a plurality of connection nozzles, and a part of the outer peripheral surface of a first connection nozzle of the plurality of connection nozzles and a part of the outer peripheral surface of a second connection nozzle adjacent to the first connection nozzle are connected to each other in a connection direction crossing the axial direction.
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