Molding tool for producing a component in a gas-assisted injection molding process

Molding tool for producing a component in a gas-assisted injection molding process, comprising a mold cavity, whose inner walls form the contour of the component to be produced, a molding device, with which plastic melt can be introduced into the mold cavity and an injection device with a pressure gas source, with which gas under pressure can be fed into the plastic melt introduced into the mold cavity, whereby the plastic melt is pressed against the inner walls of the mold cavity,

• wherein the injection device comprises a piston with an injector head, wherein the piston is guided moveable between an idle position and a working position in a passage of the molding tool which is connected with the mold cavity, wherein the injector head forms a part of the inner walls of the mold cavity in the idle position, and wherein the injector head is pushed into the plastic melt contained in the mold cavity during movement of the piston into its operating position, so that gas under pressure can flow through the passage into the plastic melt contained in the mold cavity, wherein the piston is moveable from the idle position into its operating position driven by the gas to be fed through the passage into the plastic melt, wherein a gas discharge line is provided connected with the first section of the passage, through which gas discharge line gas can be discharged after the end of the gas-assisted injection molding process, when the piston moves back into its idle position.