Injection moulding elements which can move rotationally with respect to each other using bi-injection mould cooperating with rotating carriage

摘要

In a first moulding phase, in a first impression in the bi-injection mould and with the aid of pins (4) the first element (1) is injection moulded. The element has a conical hollow axes (3) having a low retaining strength and constituting the axes of rotation of the elements wrt. each other. The element is transferred to a second impression in the bi-injection mould by rotating the carriage. Pins (5) are introduced into the conical cavities of the axes obtained during the first moulding phase and make it possible to open out the ends (6) of the cavities to obtain a permanent plastic deformation of the axes at this point. In a second moulding phase, the second element (2) is over-moulded by injection around the hollow axes of the first element previously opened out by the pins.