process for the production of hollow bodies by means of rotational moulding, synthetic material soft and elastic with channel pas sante.especially for the implementation of tools track, fi - sioterapici, play - sports or similar.

摘要

The subject of the present invention is a method for producing, by rotational stamping, of hollow bodies, made of soft and elastic synthetic material, with continuous channel, especially for making gymnastic, physiotherapeutic, athletic or play equipment or the like. The present method consists in carrying out the rotational stamping of a hollow body made of synthetic material around a tubular element, arranged in the moulding stamp for adhesion of the synthetic material to the tubular element, which defines a channel passing through the hollow body and hermetically separated from the cavity of the hollow body. IMAGE