Injection-molding device for producing multi component moldings and method for producing multi-component moldings

A method for producing a plastic article, comprising:

• a) providing an injection-molding device comprising
• a mold having a first article cavity,
• an injection device to inject fluid into the first article cavity,
• a mold core,
• a mold insert,
• wherein the mold insert forms an appendage of the first article cavity and which encloses the mold core,
• wherein at least the mold core and the mold insert form a second article cavity;
• b) sealing the second article cavity by movable mold parts;
• c) at least partially filling the second article cavity with a second article molding compound;
• d) opening the mold parts after the second article molding compound has at least partially solidified;
• e) moving the mold insert and the mold core along an advancement path that is formed by the opening of the mold parts;
• f) at least partially filling the first article cavity with a first article molding compound, wherein the first article molding compound is different from the second article molding compound, and the first article molding compound and the second article molding compound are compatible in molecular terms, and wherein the first article molding compound connects to the second article molding compound;
• g) introducing a fluid into the first article cavity with the injection device such that the fluid displaces a portion of the first article molding compound from the first article cavity to provide the plastic article having a hollow body;
• and
• i) demolding the article.