Fibre-forming plate

The invention relates to a plate (1) for forming fibres of mineral fibres, in particular glass fibres, by centrifugation from a molten material, comprising: - a preferably frusto-conical peripheral strip (2) bored with openings (9) for passing the molten material and obtaining the fibres by stretching during said centrifugation; - a web (3) connecting said peripheral strip (2) to an upper collar (6) for securing the plate in a fibre-forming device; - a return (4) extending said peripheral strip (2) at the bottom of the plate and forming an angle b with same, said plate being characterised in that the angle b is strictly smaller than 90°.