Shuttle table machines are characterized by an operating area that is separated from the loading station. The plastic parts to be welded can thus be optimally loaded into the equipment. Thanks to good accessibility, assembly and loading tasks can be easily performed. Can optionally be designed with one or more work stations. Approach of several operating positions is performed by means of a freely programmable linear drive. In this way, weld tasks can be divided into individual process steps. Tool change systems: optionally available.