Injection molding tool for producing small plastic filters has a third fixed tool member with a punching sleeve through which a core passes to hold filter material with exposed edges during molding

摘要

The tool has a fixed(2) tool half including a first member(4) with a core(5) for holding the filter material(6) in a molding cavity between both tool halves, a second member incorporating one half(8) of the molding cavity, a slit shaped filter material guide and punch(11). A third member(14) between the other two has a punching sleeve(15) through which the core is guided. A moving tool half(3) includes the other half of the molding cavity and a spring-loaded counter holder(13) for the filter material.