| 摘要 |
<p>PURPOSE:To obtain a high and stable mechanical strength at a connecting part correspondingly to a change of a rubber tube in wall thickness by a method wherein a bonding part core member is disposed on the end parts of rubber tubes to be connected to each other, and the rubber tubes are connected by vulcanization to form a sealed rubber tube. CONSTITUTION:One end of a bonding part core member 7 is inserted to an open end of a rubber tube composed of a straight pipe part 4 for sealing the connected open end and a curved pipe part 5, and the other end thereof is fitted into an open end of a rubber tube composed of a straight pipe part 4'' sealing the connected open end, a curved pipe part 5', and a straight pipe part 4'. A raw rubber 12 is applied around the bonding part at the ends of the curved pipe part 5 and the straight pipe part 4'. The ends and thereabouts provided with the bonding part core member 7 is set in a connecting mold 17 The rubber is vulcanized by keeping the connecting mold 17 at 140-150 deg.C for approximately 90min to connect the curved pipe part 5 with the straight pipe part 4'. In this manner, a split purging rubber tube 1 sealed at end parts 2, 2 can be produced.</p> |
