Screw pump module for the extrusion of plastic materials

A screw pump module for extrusion of plastic materials, comprising:

• a drive motor;
• a body with an inlet and an outlet for a molten plastic material;
• a hollow cylinder with an inlet and an outlet;
• a screw with a helical thread around a circumference of the screw;
• a first connection conduit between the inlet of the hollow cylinder and the inlet of the body;
• or
• a second connection conduit between the outlet of the hollow cylinder and the outlet of the body;
• wherein said screw is rotated by said drive motor;
• wherein inside said hollow cylinder said screw with the helical thread rotates;
• wherein the molten plastic material enters from the inlet of the hollow cylinder and, following the rotation of said screw with the helical thread, exits from the outlet of said hollow cylinder;
• wherein said inlet of the body and said outlet of the body is at a common end of said body;
• wherein said inlet of the body and said outlet of the body are respectively equipped with a flange for the inlet of the body and a flange for the outlet of the body of the molten plastic material, and wherein the flanges are positioned with a coincident axis;
• wherein inside said body is said first connection conduit through which the molten plastic material that enters from the inlet of the body reaches the inlet of the hollow cylinder;
• or through said second connection conduit the molten plastic material leaving the hollow cylinder reaches the outlet of the body;
• and
• wherein said first connecting conduit is positioned with an axis thereof substantially parallel to a main axis of the screw.