Process for the Production of Piping Made of a Cementitious Material Having a Circular Section
AssigneeItal Cementi S.P.A.
InventorsGian Luca Guerrini, Roberta Alfani
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for the production by extrusion of piping made of a cementitious material having a circular section and fine thickness, suitable for the channeling of liquids and gases at atmospheric operating pressure or slightly higher.
Claims17
A process for the production of piping made of cementitious material having a circular section and a low thickness by the extrusion of a cement-based paste, characterized in that it comprises a rolling phase of the neo-extruded piping inside tubular moulds until a hardening degree of the cementitious material is obtained which preserves the circular form.
The process according to any of the previous claims, characterized in that the combination of neo-extruded piping and tubular counter-mould are kept in alternating rotation at a rate ranging from 0.2 rpm to 10 rpm.
A process for the production of an end-product made of cementitious material having a circular section and low thickness comprising:
- a mixing phase of a cement-based mixture with water to give a wet cement-based powder;
- a homogenization phase of said wet powder in a pasting machine to produce a cement-based paste suitable for extrusion;
- an extrusion phase of said cement-based paste in an extruder to give a cement-based end-product having a substantially circular section;
- a flowing phase of said cementitious product having a substantially circular section inside a tubular mould positioned close to the die of the extruder to form a combination of an end-product-tubular mould;
- a cutting phase of said end-product-tubular mould system;
- a rolling phase of the end-product-tubular mould system until a hardening degree of the cementitious material is reached which allows the circular form of the product to be preserved.
Dependencies are inferred from the claim text.