| 摘要 |
To keep the shutoff needles (20) of an injection molding apparatus (1) clean during operation, a cleansing unit (10) is used within said apparatus. The injection molding apparatus (1) comprises at least one needle shutoff nozzle feeding a flowable material to a detachable mold insert, the shutoff needle (20) being displaceable by a drive unit into an open position and a closed position. At least one cleansing element (40) geometrically matching the outer surface of the shutoff needle (20) is as- sociated with each needle to remove material clinging to its outer surface (24). The preferably planar cleansing elements (40) are combined into a set of wipers in a housing (11), spacers (14) being con- figured between two adjacent cleansing elements (40). The housing (11) is affixable on or in the injec- tion molding apparatus (1).
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