A mold for the embodiment of an invert (flow channel) prefabricated and the product

摘要

The manhole is placed on a joint of a conduit circulating the liquid and defines a two branch channel open at the top and with an angle between the branches. The central circular part has a variable radius and the outside radius has a centre situated inside the channel. The mould has an envelope (15) formed by a perimeter wall (17) and a base (16), a pattern (18) made by two articulating branches (19,20) with a pivot (26) altering the mutual angle, and braces and wingnuts (34,36) maintaining the axis (A) perpendicular to the plane of the base.