INJECTOR FOR FILLING A MOLD WITH PLASTIC PARTICLES

The invention relates to an injector for filling a mold with plastic particles, comprising a front part (2) and a base part (3). The front part (2) has a mold-side opening (23) and a feed for compressed air (15) and a feed for plastic particles (11), and the base part (3) is attached axially behind the front part (2) in the conveying direction and has a piston-cylinder unit (30, 37, 38). The closing piston (49) can be axially moved through the front part (2) in order to close the mold-side opening (23). The invention further relates to a device and to a method for producing a particle foam part. The injector is characterized in that the closing piston (49) and the piston rod (47) bearing the closing piston on the front side have equal diameters or substantially equal diameters, and the method comprises the following steps: feeding foam particles from a material container to a molding tool by means of a line, thermoplastically welding the foam particles in the molding tool into the particle foam part while heat is supplied, water vapor being added to the foam particles to be fed.