INJECTOR FOR FILLING A MOLD WITH PLASTIC PARTICLES

摘要

The invention relates to an injector for filling a mold with plastic particles, with a front part (2) and a base part (3), wherein the front part (2) has a mold-side orifice (23) and a feed for compressed air (15) and a feed for plastic particles (11), and the base part (3) is attached axially in the direction of conveyance behind the front part (2) and has a piston-cylinder unit (30, 37, 38), wherein a closing piston (49) for closing the mold-side orifice (23) is axially movable through the front part (2), together with an apparatus and a method for the production of a particle form part. The injector is characterised in that the closing piston (49) and the piston rod (47) bearing the closing piston on its front side have equal diameters or substantially equal diameters and the method comprises the following steps:
feeding form particles from a material container to a mold by means of a pipethermoplastic welding of the form particles in the mold into a particle form part under a supply of heat,

wherein steam is added to the form particles to be fed.

主权项

1. Injector for filling a mold with plastic particles, with a front part and a base part, wherein the front part has a mold-side orifice and a feed for compressed air and a feed for plastic particles, and the base part is attached axially in the direction of conveyance behind the front part and a through bore is provided at an end of the base part which lies axially forward in the direction of conveyance and the base part has a piston-cylinder unit, and a piston rod guide, wherein a closing piston for closing the mold-side orifice is axially movable through the front part, wherein the closing piston and the piston rod carrying the closing piston on its front are designed with an identical or substantially identical diameters, wherein the closing piston may be retracted completely into the piston rod guide and the through bore.