a method for producing a plastic injection - moulded part having an insert made of a material different from the plastic material is provided , the method comprising the steps of : introducing and positioning the insert in a cavity of an injection mould ; setting the clamping force of the injection mould on a clamping mechanism to a maximum force predetermined by the material of the insert ; and seamlessly encapsulating the insert with the plastic material of the plastic injection - moulded part inside the injection mould , wherein the encapsulating is seamless or complete .