EXPANSION TUBE ADAPTER FOR AUTOMATICALLY CONTROLLING VACUUM FOR HEAT CONTRACTION TUBE WITH DISPERSION OF STRESS

摘要

PURPOSE: An expansion tube adapter for automatically controlling vacuum for a heat contraction tube is provided to reduce the stretching deviation of a tube by dispersing the stress applied to the tube. CONSTITUTION: An expansion chamber(200) includes an expansion tube(250) and a vacuum chamber. An expansion tube adapter(300) is fit into the top of the expansion tube, and includes a hollow disk(320) and a cylinder(330) coupled to the disk. The inner diameter of the disk is smaller than the inner diameter of the cylinder. A plurality of air holes(310) are formed at the disk.