摘要:
Device for measuring the rheological properties of a viscoelastic material, formed of an upper rotating plate (10) and of a lower rotating plate (20) which are able to press against the opposite faces of a sample S of the material to be measured. The axes of rotation (a1 a1′ and a2 a2′) of said plates are arranged parallel to one another in a direction perpendicular to the plane formed by the plates, and offset from one another by a distance d. Two independent motors (12, 22) drive respectively the upper plate (10) and the lower plate (20) at the same speed of rotation ω, without giving rise to any angular displacement between the two plates.
摘要:
A gear pump, in particular for pumping material such as rubber mixes, includes an enclosure in which a central gear wheel and two peripheral gear wheels rotate. Teeth of the central gear wheel mesh with teeth of both peripheral gear wheels to pump material from an inlet to an outlet. The pump includes at least one feed chamber in which a feed mechanism delivers material to the inlet. The gear wheels are separately driven by a driving torque. A prestressing device applies a torsional prestress which presses the meshing teeth together for creating a seal between those meshing teeth to prevent leakage of material past the teeth.
摘要:
A device for handling a rubber-containing product web (20) intended for the manufacture of a tire, of the type comprising: an endless belt (24) for conveying the web (20), which belt is guided and driven by a set of rollers (R1 to R8) rotatably mounted about axes parallel to a direction (Y), termed the transverse direction, at least some of these rollers (R1 to R8) separating a carrier strand (24P) of the belt, which is intended to carry the web (20), from a return strand (24R) of the belt, a reel (28) for winding the web (20), which reel is arranged above the carrier strand (24P) and rotatably mounted about an axis substantially parallel to the transverse direction; and (Y), means (46) for temporarily diverting the path of the carrier strand (24P) between a normal path of the carrier strand (24P), substantially tangential to the reel (28), and a temporary path for winding the carrier strand (24P) around a sector of the reel (28) that is more than 90°.