Cifa S.p.a.

Davide Cipolla

Nicola Pirri

Mauro Marco Cortellini

Fabio Ferre

Ferruccio Resta

Antonello Pizzi

Mauro Cortellini

Method to make a curved tubular element in order to convey abrasive materials such as concrete or suchlike, which comprises a first step of making at least a curved component made of a material highly resistant to wear, having an arched transverse development comprised between 90&#xb0; and 360&#xb0;, a second step of inserting the curved component into a shaping mold with a molding surface with a shape mating with the outer surface of at least a part of the curved tubular element to be made, so that, together with the molding surface, the curved component defines a casting chamber, and a third step in which material with a low resistance to wear is cast in the casting chamber in order to make, externally to the curved component, at least a part of a tubular body of the curved tubular element.

Method to make a curved tubular element in order to convey abrasive materials such as concrete or suchlike, and curved tubular element thus obtained

A method to make an arm for the distribution of concrete, or other material similar to concrete, used on heavy work vehicles, wherein the arm comprises a plurality of segments selectively folding and extendible one with respect to the other. Each segment comprises a main girder and auxiliary elements for connection to adjacent segments or for attachment of movement and/or supporting devices for the pipe that carries the concrete. The method comprises a first step in which each main girder is formed, with a predefined length, by depositing a plurality of layers of pre-impregnated composite material in a female type mold. The method comprises a second step in which the composite material, deposited in layers in the mold in a variable number of layers, is subjected to polymerization. The method comprises a third step in which each main girder is removed from the mold and a fourth step in which the auxiliary elements are associated with each girder so as to form a relative segment. The method comprises a fifth step in which the extendible arm is assembled, connecting the various segments at the respective ends. The cross section of each of the main girders of the segments is substantially constant over the whole length thereof. The female mold consists of one or more elementary molds of equal section, connected in sequence with each other according to the overall length of the main girder to be made.

Method to make an arm for the distribution of concrete, and arm thus made

Growing community of inventors

Cantu, Italy

Davide Cipolla