MANDREL FOR THE FULL MANUFACTURE OF HOLLOW PARTS HAVING A MULTIDIRECTIONAL REINFORCEMENT AND METHOD OF MANUFACTURING SUCH A PART USING THIS MANDREL

摘要

In order to fabricate hollow parts by implementation of pins on a mandrel, setting in place wires according to at least two different directions along corridors formed between the pins, and densifying the obtained structure, a mandrel is used which is made of a material of which the compressive strength is compatible with the conditions of implementation of the pins and which keeps its geometrical integrity up to at least 700oC approximately. Said material is preferably a mineral material such as silica. It has the aspect of a foam or a felt. In the case of a felt, the latter is fixed to an inner support by means of an adhesive which, as well as the support, resists to a temperature of at least 700oC approximately. The utilization of this type of material enables to fabricate all parts on one same mandrel even when said parts are brought to a temperature of at least 700oC during their densification.