PROCESS FOR PRODUCING HIGH-PRESSURE COLLAR FLANGES FROM COMPOSITE MATERIAL, AND PRODUCT OBTAINED

摘要

1. Process for producing high-pressure collared flanges made of composite material, characterized in that it comprises the following steps : a) placing in the die (30) of a mould a preform (17) based on glass fibres or the like and intended to delimit the outer surface (15) of the top (12) and the outer surface (16) of the collar (11), b) depositing at least a layer of glass fibres or the like (18) in the die of the mould in the region of the sealing face (13) of the collar (11) and of the top (12), c) filling the die (30) of the mould with mineral fillers (21) which are inert relative to the products intended to be conveyed and which have suitable dimensions in relation to the layers of fibres used (17, 18), so that the latter perform the function of a filter preventing the passage of the fillers, d) covering the mineral fillers (21) with at least one layer of glass fibres (19) or the like in the region of the connecting face (14) of the top, e) closing the mould, f) injecting thermosetting resin inside the mould, whilst at the same time connecting the latter to suction-generating means.