Method of manufacturing a plastic frame for a two-wheeler

A method of manufacturing a plastic frame for a two-wheeler having at least one hollow space in an interior by means of plastic injection molding, said method comprising the following steps:

• injecting a thermoplastic plastic melt into a closed injection molding tool;
• after injecting the thermoplastic plastic melt, injecting at least one fluid into a first end of the closed injection molding tool and flowing the at least one fluid through thermoplastic melt to force a plastic core of the injected thermoplastic plastic melt through a first tube of the closed injection molding tool and a second tube of the of the closed injection molding tool and toward a screw antechamber of the closed injection molding tool, wherein the displacement of the plastic core forms an interior hollow space of the two-wheeler frame and the plastic core is displaced from the first end, through the first tube and the second tube of the closed injection molding tool before being forced into the screw antechamber, wherein the first tube and the second tube of the closed injection molding tool form tubes on opposing sides of the two-wheeler frame;
• and
• at least briefly maintaining fluid pressure in a component interior formed by displacing the injected thermoplastic plastic melt;
• wherein the fluid presses the plastic core via a mass back pressure process into the screw antechamber.

A method of manufacturing a plastic frame for a two-wheeler, said method comprising the following steps:

• injecting a thermoplastic plastic melt into a closed injection molding tool defining an exterior of the plastic frame;
• after injecting the thermoplastic plastic melt, injecting at least one fluid into a first end of the closed injection molding tool and flowing the at least one fluid through thermoplastic melt to force a plastic core of the injected thermoplastic plastic melt through a first tube of the closed injection molding tool and a second tube of the of the closed injection molding tool and toward a second end of the closed injection molding tool, wherein the displacement of the plastic core forms an interior hollow space of the two-wheeler frame and the plastic core is displaced from the first end, through the first tube and the second tube of the closed injection molding tool before being forced out of the second end, wherein the first tube and the second tube of the closed injection molding tool form tubes on opposing sides of the two-wheeler frame;
• and
• at least briefly maintaining fluid pressure in the interior hollow space;
• wherein the fluid is introduced into a hose surrounded by the thermoplastic plastic melt such that a direct contact between the fluid and the thermoplastic plastic melt is prevented.