| 摘要 |
Injection moulding core for pipe bends, with at list one straight pipe terminal portion, wherein the bend core is divided in various segments (a) which are preferably wedge-shaped when viewed sideways and which are connected by appropriate elements preferaby mushroom-shaped projections (c) to form a chain so that the medial line (b) of the chain of sectors may form a straight line, and which are mutually fixed by appropriate elements, preferably centering pin (d) or adjusting springs and/or an edge overlapping the various sectors (a), in order to avoid any displacement and torsion, and which comprise one or a plurality of holes (e) through which pass one or a plurality of traction elements, preferably metal cables (f) which are connected to the last sector (a) of the chain, whereas they are connected to displacement elements (i) at the other end of the chain by means of a core (h) fixed preferably to that end of the chain and provided for the straight pipe terminal portion. |
