초록 ▼

A plastic injection molding machine is provided which includes a filter for the continuous removal of foreign particulate contaminants from molten resin. The molding machine has a filter assembly with a passage for molten plastic resin and also includes a movable filter body containing a plurality,

A plastic injection molding machine is provided which includes a filter for the continuous removal of foreign particulate contaminants from molten resin. The molding machine has a filter assembly with a passage for molten plastic resin and also includes a movable filter body containing a plurality, e.g, two, removable filters movably supported within the filter assembly for transporting the filter element between at least a pair of alternate positions, including an operative position within the passage containing the molten plastic resin and a non-aligned inoperative position. The filter body has a bored opening containing the filter and an accumulation chamber for storing the foreign material upstream of the filter. During operation, the foreign material becomes lodged in the accumulation chamber within the filter body and remains stored within the filter body so that it can be removed each time the filter body is shifted to move one of the filters from an operative position to a non-aligned inoperative position. The foreign material collected and stored in the accumulation chamber is carried with the filter body when the filter body is shifted to an inoperative position where the foreign material can be removed from the filter assembly.

대표청구항 ▼

[ What is claimed is:] [1.] A plastic injection molding apparatus having a provision for continuous removal of foreign particulate contaminants from molten plastic resin, said apparatus comprising,a molding assembly,a filter assembly connected to the molding assembly for receiving molten plastic tha

[ What is claimed is:] [1.] A plastic injection molding apparatus having a provision for continuous removal of foreign particulate contaminants from molten plastic resin, said apparatus comprising,a molding assembly,a filter assembly connected to the molding assembly for receiving molten plastic that is fed into the molding assembly, said filter assembly having a housing with an inlet passage for molten plastic resin extending therethrougha movable filter body containing a plurality of removable filters, said filter body being movably supported within the filter assembly for shifting between at least two alternate positions, one of which communicates with the passage, whereby each of the filters is moved between an operative position communicating with the passage containing the molten plastic resin and a non-aligned inoperative position,the filter body has a plurality of openings,a) each containing one of the removable filters, andb) each opening includes an accumulation chamber located between a mouth at one end of the opening and the filter for the storage of foreign material that becomes lodged upstream of the filter,whereby foreign material collected in the accumulation chamber within the movable filter body remains within the filter body for removal and is carried with the filter body when the filter body is shifted from the operative position to the non-aligned inoperative position where the foreign material is removed from the filter assembly.