| 摘要 |
A nozzle for an injection molding machine is provided to simplifying design according to change of injection pressure, structures of a needle and a filter member, and realizing smooth flow of resin and smooth motion of the needle. A nozzle for an injection molding machine includes a cylinder(110) connected to the injection molding machine, molten resin being inputted the cylinder(110), a cap(130) connected to an end of the cylinder and having an ejecting hole(131) so that the resin can be injected into a mold, a filter member provided inside the cylinder and having at least one resin inflow groove and resin outflow groove independently formed on the outer circumference thereof and having plural communication grooves so that the resin in the inflow groove is filtered. Both ends of the filter member are formed to be open so that the inner diameter of one end of the filter member toward the ejecting hole is smaller than that of the other end. An opening/closing device(150) is provided inside the nozzle for selectively opening the ejecting hole according to inflow pressure of the resin. A rear support cap(160) is connected to the other end of the filter member for supporting the other end of the filter member.
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