process for producing plastic net structures and appa - rato for implementing said method.

摘要

the found is referred to a process for producing plastic net structures includes a first stage for the extrusion of a tubular structure of longitudinal continuous filaments in mplastic material and a subsequent phase which consists of overlapping horizontal filaments in order to define a picture square or rectangular holes and regular.the find also refers to an apparatus for implementing the method, comprising an extrusion head with cylindrical body within which is defined a chamber for the passage of the butthis plastic from a machine extruder toward an exit below.the apparatus is characterized by the fact that the exit is defined between a lower opening.place it in opposite a portion lower than the end of the chamber for the passage of the plastic material of the head.and a circular plate which faces toward the lower portion, at least one of the openings and the plate are provided with a circular groove with a plurality of slits bystanders.at least one of the portions, and the lower circular plate is connected to a means of alternative movement to bring into line and separated respectively from each other.