Made up parts
The production of certain parts can only be achieved by the making up process. This consists in coating a core by a film of fabric / crude rubber. Then vulcanisation is carried out, after wrapping, in an autoclave with a steam pressure of between 5 and 7 bars.
The choice of process depends on the complexity of the shapes, which leads to prohibitive tooling costs or dimensions that mean they cannot be manufactured on a press.
For example: cylindrical sleeves that are made up on mandrels, and then cut to length.
Expansion bellows, the diameter and heights of which are significant.
Traditional materials are used, depending on the environment, with fabrics chosen from the range available.
These parts are formed in accordance with customers’ drawings; no standard is currently available.