[Problems] The objective of present invention is to provide the mold, injection molding system and method capable of limiting the outflow of pressurized fluid injected into a mold cavity. [Solution] A mold device and a molding device comprising: a shaft body 27 provided at least on one mold among a first mold 205 and a second mold 206 that form a molding space 200, the shaft body being used for pushing out a molded article formed from a resin injected into the molding space 200; a ring-shaped elastic member for supporting the shaft body 27 in which an opening formed along the circumferential direction is oriented toward the said molding space; and an injection portion provided on at least one mold among the first mold 205 and the second mold 206, the injection portion being used for injecting a pressurized fluid into the molding space 200.

The disclosure relates to an injection nozzle (1) suitable for injection molding of thermoplastic materials, in particular polyolefin materials, the injection nozzle (1) comprising a housing (2) comprising a sleeve-shaped rear section (3) and a thereto coaxially arranged sleeve-shaped front section (4) surrounding a central passage (5) extending in an axial direction (z) forming part of a melt channel (6). In the central passage (5) a needle (7) is arranged movable in the axial direction (z) between a retracted open position and an extended closed position in which a gate (8) at a tip (9) of the front section (4) is closed by a front end (10) of the needle (7) in a sealing manner. A spacer (11) is arranged between the rear section (3) and the front section (4) defining a total length of the housing (2) in the axial direction (z).

The disclosure relates to an injection nozzle (1) suitable for injection molding of thermoplastic materials, in particular polyolefin materials, the injection nozzle (1) comprising a housing (2) comprising a sleeve-shaped rear section (3) and a thereto coaxially arranged sleeve-shaped front section (4) surrounding a central passage (5) extending in an axial direction (z) forming part of a melt channel (6). In the central passage (5) a needle (7) is arranged movable in the axial direction (z) between a retracted open position and an extended closed position in which a gate (8) at a tip (9) of the front section (4) is closed by a front end (10) of the needle (7) in a sealing manner. A spacer (11) is arranged between the rear section (3) and the front section (4) defining a total length of the housing (2) in the axial direction (z).

[Problems] The objective of present invention is to provide the mold, injection molding system and method capable of limiting the outflow of pressurized fluid injected into a mold cavity.

[Solution] A mold device and a molding device comprising: a shaft body 27 provided at least on one mold among a first mold 205 and a second mold 206 that form a molding space 200, the shaft body being used for pushing out a molded article formed from a resin injected into the molding space 200; a ring-shaped elastic member for supporting the shaft body 27 in which an opening formed along the circumferential direction is oriented toward the said molding space; and an injection portion provided on at least one mold among the first mold 205 and the second mold 206, the injection portion being used for injecting a pressurized fluid into the molding space 200.