Abstract: A method for checking the production quality of a cable that is provided with a protective sheath, in particular an electrical cable, includes the steps of acquiring images of an external surface of the cable by way of one or more digital video cameras, while the cable is moved along an advancement axis. The method also includes processing the images by way of one or more algorithms in order to calculate one or more numeric indices, each one of which is proportional to a respective optically-detectable characteristic of the external surface of the cable.

Abstract: A temperature probe, particularly for thermoplastic mix extrusion machines, which comprises at least one casing, which is adapted to be inserted in an extrusion cylinder substantially at right angles to the extrusion direction with one end thereof facing into the internal cavity of the extrusion cylinder so that it is in direct contact with the extrusion material contained in the internal cavity, and at least one thermocouple, which is accommodated in the casing and is adapted to detect the temperature of the extrusion material by thermal conduction through the casing, the temperature probe comprising thermally insulating elements which are interposed at least partially between the casing and the extrusion cylinder so as to reduce the thermal influence of the extrusion cylinder on the measurement made by the thermocouple.

Abstract: An extrusion machine with improved structure, comprising an internally hollow extrusion cylinder, at least one heating element associated with the extrusion cylinder, at least one cooling fan which engages the outer surface of the extrusion cylinder, and at least one temperature probe which is inserted in the extrusion cylinder, the temperature probe facing the cavity of the extrusion cylinder and the temperature probe being adapted to be in direct contact with the extrusion material contained in the cavity of the extrusion cylinder.

Abstract: An extrusion machine with improved structure, comprising an internally hollow extrusion cylinder, at least one heating element associated with the extrusion cylinder, at least one cooling fan which engages the outer surface of the extrusion cylinder, and at least one temperature probe which is inserted in the extrusion cylinder, the temperature probe facing the cavity of the extrusion cylinder and the temperature probe being adapted to be in direct contact with the extrusion material contained in the cavity of the extrusion cylinder.