A device for producing a mold part. The device includes a first tool component and a second tool component. The first tool component has a first pressing surface and a first cavity. The second tool component has second pressing surface, a second cavity, and a nozzle configured to supply a liquefied synthetic material. The first and second cavities are configured to overlap at least partially in a cross-section perpendicular to the first and second pressing surfaces when the first and second pressing surface face each other. At least one of the first and second tool components is configured to be movable relative to another.