| 摘要 |
PURPOSE: An apparatus for stretching films is provided to provide a homogeneous tension to the film by using zero pressure from a vacuum pump via a vacuum inhalation portion. CONSTITUTION: A base(10) includes a lower mold insertion hole on a surface thereof, a vacuum inhalation portion around the lower mold insertion hole, and a pressure application hole at the center thereof. A lower mold(32) is inserted in the lower mold insertion hole. A vertical transfer portion(20) is moved vertically with respect to the base. An upper plate mold(30) is coupled with the lower mold at a lowest position at an end of the vertical transfer portion. An external clamp(40) is moved vertically with respect to the base and applies pressure on a film on an external portion of the lower mold at the lowest position. A vacuum pump provides zero pressure in the vacuum inhalation portion. A pressure generator(70) applies test pressure on the film via the pressure application hole. |
