| 摘要 |
<p>In a system for evacuating air from moulds for vulcanizing tyres, the air and vulcanization gases trapped in the various interstices of the mould (1) are evacuated to the outside of the moulding part through a part which serves as a vent (3) and which contains one or more direct passage chambers (4) of constant width on the so-called bottleneck part which are dimensioned so as to prevent the passage of the rubber.</p> |
