Method for manufacturing an air filter and apparatus to carry out such method.

摘要

The method for manufacturing an air filter consists of building in two times, around a paper filtering element (9) previously prepared, an edge (30) made of flexible foam, first injecting resin into a separate space (27) from the filtering element (9), and then letting it expand till it anchors to it. An apparatus to carry out such method substantially consists of a die (1, 2) in which the filtering element (9) is inserted, around which a channel (25) is formed where a mobile frame (10) is sinked, whose shape corresponds to the filtering element (9) one, in such a way as to define an injection recess (27) separated fron the filtering element, and an expansion recess (28) adjacent to the filtering element (9), connected by the mobile frame (10) lift, so that the resin can expand and anchor to the filtering element (9).