| 摘要 |
PROBLEM TO BE SOLVED: To provide an extrusion T-die apparatus which can control an edge bead.SOLUTION: There is provided an extrusion T-die apparatus (1) with a film thickness control function which includes an extrusion T-die (20), film thickness measurement means (8), and an inner deckle control device (9). The extrusion T-die (20) has an inner deckle mechanism having any one of a lot bar and a middle flag or both of them, and extrudes a molten resin into a film shape. The film thickness measurement means measures a film thickness of a molten resin film (R2) using a laser spectroscopic interference displacement meter. The inner deckle control device (9) controls any one of the lot bar and the middle flag or both of them of the inner deckle mechanism using the measured film thickness value of the molten resin film (R2), and controls a lug thickness of the molten resin film (R2).SELECTED DRAWING: Figure 1 |
