Device for the continuous filtration of molten plastic material

A filtering device for filtering molten plastic material, comprising:

• a body;
• a chamber inside of the body;
• a hollow perforated cylinder that rotates around a main axis thereof inside of the chamber;
• an inlet opening on the body for allowing the molten plastic material to enter inside of the chamber so that the molten plastic material can be filtered inside of the chamber;
• an outlet opening on the body for allowing the molten plastic material to exit from the body after the molten plastic material is filtered inside of the chamber;
• a connection opening that connects the outside of the body with the chamber on the inside of the body;
• a filtration mesh belt that filters the molten plastic material inside of the chamber, wherein the filtration mesh belt enters the chamber through the connection opening and exits the chamber through the connection opening after filtering the molten plastic material inside of the chamber, the filtration mesh belt having a section of inlet-mesh that enters the chamber from outside of the body through an inlet path of the connection opening, a section of adjoining-mesh that engages an outer surface of the hollow perforated cylinder, and a section of outlet-mesh that exits the body from the chamber through an outlet path of the connection opening;
• and
• a mobile cone that has a first side wall, a second side wall, a base wall between the first and second side walls, and a cusp between the first and second side walls and below the base wall, the base wall of the mobile cone facing the chamber so as to underly the hollow perforated cylinder inside of the chamber;
• wherein the first side wall of the mobile cone, together with the body, forms the inlet path of the connection opening and the second side wall of the mobile cone, together with the body, forms the outlet path of the connection opening;
• wherein the mobile cone is movable downwardly and upwardly between a closed position and an open position;
• wherein when the mobile cone is moved downwardly into the closed position, the first and second side walls of the mobile cone are moved closer to the body, with the section of inlet-mesh of the filtration mesh belt being disposed within the inlet path of the connection opening and the section of outlet-mesh of the filtration mesh belt being disposed within the outlet path of the connection opening;
• and
• wherein when the mobile cone is moved upwardly into the open position, the first and second side walls of the mobile cone are moved farther from the body, with the section of inlet-mesh of the filtration mesh belt being slidable within the inlet path of the connection opening and the section of outlet-mesh of the filtration mesh belt being slidable within the outlet path of the connection opening.