Abstract: A method is disclosed for dispensing a polyurethane mixture onto a substrate by generating a liquid mixture from reactive component resins; introducing the mixture in an inlet section of a dispensing device so as to advance it towards a planar-shaped outlet slit section, transversely to the advancement direction of the substrate; distributing the mixture along a gap chamber having a cross section diverging towards the outlet slit section; and dispensing the mixture through the outlet slit section, so as to deposit a thin, uniform film onto the substrate. Fractions of the mixture travel equal distances from the inlet section to the outlet slit section, in equal times, maintaining equal average speeds along each section having zones placed all at the same path distance either from the inlet section or from the outlet slit section.

Abstract: A method is disclosed for dispensing a polyurethane mixture onto a substrate by generating a liquid mixture from reactive component resins; introducing the mixture in an inlet section of a dispensing device so as to advance it towards a planar-shaped outlet slit section, transversely to the advancement direction of the substrate; distributing the mixture along a gap chamber having a cross section diverging towards the outlet slit section; and dispensing the mixture through the outlet slit section, so as to deposit a thin, uniform film onto the substrate. Fractions of the mixture travel equal distances from the inlet section to the outlet slit section, in equal times, maintaining equal average speeds along each section having zones placed all at the same path distance either from the inlet section or from the outlet slit section.

Abstract: The apparatus for die-casting cage type electric rotors in vertical presses, comprises a first and a second rotary table supporting a plurality of bottom die members, and a corresponding plurality of injection units; the tables are partially superimposed and are made to rotate in synchronism to sequentially align each bottom die member and a corresponding injection unit with an upper die member in a metal injecting workstation. Each injection unit comprises a sleeve and a plunger which are engageable and disengageable respective control cylinders and gripping members in correspondence with the metal injecting station and a biscuit removal station the injection sleeves and the bottom die members are movably supported by the rotary tables, to be rised and urged against a stack of laminations of a rotor in the metal injection station of the press.