| 摘要 |
PROBLEM TO BE SOLVED: To independently stably control thickness of each layer of a plural- layer film by providing a space between a wall surface of a channel and a channel adjacent to the channel, and incorporating a channel gap regulating means in the space. SOLUTION: A beam-like block 4 for giving a deformation so that second and third thin parts 2, 3 are turned at a first thin part 1 as a center at a cavity side is provided the part 2. The block 4 is formed of a plate-like driver separated at each regulating bolt of a channel gap regulating means 5 like keying of a piano in a die width direction. Thus, since a fine deformation of a channel wall surface is executed in a width direction, a fine thickness control can be resultantly conducted in the width direction. The means 5 adopts a differential bolt type having a main regulating bolt 5a and a sub-regulating bolt 5b having different pitches of their threads. The means 5 is coupled to an end of the driver in parallel with the part 2, and contained in a cavity 9.
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