Plastic injection mould with inner air extraction and extraction method for extracting the air carried out with said mould

摘要

A plastic injection mold which allows extracting the air from inside it during the injection process, and an extraction method, where the mold includes closing means, one or more injection cavities provided with at least one injection nozzle for introducing the hot material in a liquid state and at least one ejector device formed by a housing for an ejector pin responsible for extracting the part already molded, where an air duct connected to a vacuum pump or a suction device intercepts the housings of the ejector pins causing a suction of the air from inside the mold.

主权项

1. Plastic injection mold with inner air extraction comprising:
one or more injection cavities provided with at least one injection nozzle for introducing a hot material in a liquid state; an air duct connected to a vacuum pump or a suction device; at least one ejector device formed by a housing for at least one ejector pin of a plurality of ejector pins, responsible for extracting the already molded part wherein the air duct transversely intercepts a plurality of housings of the plurality of ejector pins for causing a suction of the air from inside the mold through the plurality of existing spaces between said plurality of ejector pins and said plurality of housings before and during the injection process; and an air removal conduit which intersects with the air duct connected to the suction device, the air removal conduit comprising a piston responsible for activating a valve located adjacent to the one or more cavities and wherein the valve closes before the plastic is injected into the cavity.