Patent ID: 6317102
Filing Date: 2001-11-13
Classification: H01Q,Y10T

Abstract:
A method for manufacturing antenna units including a metallic core, which is tubular or in the form of a wire, and a jacket composed of an injectable, insulating material, at least partially enclosing the core, wherein use is made of an injection moulding tool, which is split in a parting plane containing the longitudinal, central axis of the core characterised inthat the insulating jacket is injection moulded in at least two steps,wherein the core, in a first step, is provided with a first jacket portion substantially shaped as half a tubular cylinder, while the remaining parts of the core are supported inside a first mould cavity portion, adapted to the shape of the core,whereupon at least a part of the injection moulding tool and the core with the injected first jacket portion are displaced in relation to the other, such that the core with the injected first jacket portion is supported inside a second mould cavity portion, which is adapted to this purpose,whereupon the still bare part of the core, in a second step, is provided with a second jacket portion, supplementary to the first-mentioned jacket portion and being shaped substantially as half a tubular cylinder.