Abstract:
A coaxial hose, in particular for electrostatic oiling systems, having: a flexible external tube (l);a flexible internal tube (3) for the circulation of a second fluid inside thereof, forming, together with the external tube, an annular space (7) for the circulation of a first fluid; a hose, characterised by the fact that the internal tube comprises: an internal layer made of PTFE (4) intended to contain the second fluid; internal braiding (5) intended to lend the interned tube pressure resistance; an external layer (6) made of polyamide material intended to prevent the passage of the first fluid through the braiding.
Abstract:
A method of lubricating metal articles (6), in particular those made of steel, comprising the application (4) of a dispersion comprising a lubricant oil and a lubricant powder to an article to be drawn. A drawing method comprising the lubrication as described above and a lubricant dispersion.
Abstract:
An apparatus for heating and melting solid lubricants in the delivery drum (4), wherein a heating element (1) bearing down on the upper surface (3) of the product and progressively sinking into it causes the liquefaction process, and wherein by means of sensors (5 and 7) the temperatures required for liquefaction and for maintaining the liquid state are regulated.
Abstract:
An installation for the electrostatic oiling of metal strips, with an integral system for heating the fluid circuits which allows the application of products which are solid at room temperature with melting point of 30-50 °C, wherein the main heated components of the installation are constituted by: a container (3) provided with double wall an shell and bottom within which diathermic oil circulates, a heated circulation pump (5); an electrical passage heater (6); heated Duplex filters (7, 13); heated metering pumps (8); heated pipelines (4, 12, 14); a heated booth (20); heated self-priming pump (16).