Method for producing composite bodies

A process for producing a polyacetal elastomer composite article from a molding made from polyacetal (component a)) with directly molded-on functional elements made from at least one thermoplastically processable elastomers (component b)), in which the components polyacetal and elastomer have differing hardness, wherein the material with the greater hardness (component a)) is initially pre-injected in a first step in a mold, and then

• is either cooled and removed from the mold and then placed into another, larger cavity,
• or is partially removed from the mold, but remains in a portion of the mold, and is then moved to a larger cavity,
• or, without removal from the mold, remains in the same mold, which is enlarged by means of a movable device, and
• in a second step, by overmolding with the material with the lesser hardness (component b)), the molding formed from component a) is firmly bonded to this material and is then removed from the mold as a composite article.