| 摘要 |
PURPOSE: To greatly reduce the cost on a mass-production line and to ensure a stabilized, proper sealing of a part to be sealed when it has a complicated shape by employing a ceramic material with the thermal conductivity, compressive strength, and bending strength all at respective specific values for the constitution of a support of heating elements. CONSTITUTION: The subject relates to a sealing device 1 for resin sheets which effects under heat a sealing between resin sheets 2, 3 by pressing heating elements 8, 9 on the resin sheets 2, 3 or between a resin sheet 2 or 3 and a resin-made outlet port 4. Supports 6, 10 for supporting heating elements 8, 9 are formed of a ceramic material which has a thermal conductivity of 0.01cal/cm.sec. deg.C or more, compressive strength of 1,000kg/cm<2> or more, and bending strength of 300kg/cm<2> or more and is capable of machining. The heating elements 8, 9, placed on the outer side of the supports 6, 7, are ones which are heated by high-frequency induction heating. As a result, the heating elements 8, 9 are heated uniformly at the sealing part and, even when the part to be sealed has a complicated shape, sealing can be provided properly without forming a pinhole. |
