Abstract: The invention relates to a sealing structure of a heat-dissipating tube having a neck formed at the top of the tube. The neck is compressed to a semicircular member in a closed state. Moreover, the top of the semicircular member is spot-welded to created a sealing layer. Thereby, the sealing structure of the tube can be fully closed and is not subject to break.

Abstract: The invention relates to a sealing structure of a heat-dissipating tube having a neck formed at the top of the tube. The neck is compressed to a semicircular member in a closed state. Moreover, the top of the semicircular member is spot-welded to created a sealing layer. Thereby, the sealing structure of the tube can be fully closed and is not subject to break.

Abstract: The invention relates to a method for fabricating a heat-dissipating tube by use of heating process for air expulsion. The method includes the steps of: weighing the empty tube; feeding a little more pure water than the working amount into the tube; compressing an water inlet to form a semicircular member in a not completely closed state; heating the tube for changing the pure water into vapor for air expulsion; compressing the semicircular member in a fully sealed state; keeping the tube warm and maintaining the tube pressure; spot-welding the top of the semicircular member with a sealing layer; weighing the finished product; and determining the weight difference for finding the actual input amount of water after the process of air expulsion by heating and for judging if the tube is a conforming or a nonconforming item.