弾性変形を利用した空圧ダイリップ駆動機構の開発

概要

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In the laminating process, automatic profile control of extruded film thickness in cross-direction is required for better productivity and product uniformity. The thickness profile is determined by the gap pattern of the die-lip heated at 350℃. Conventionally the correction of the gap is made by manual adjustment of the individual die bolts equipped in the side of the die. In this paper, a new method, which utilizes the mechanical elastic deformation of the lip by a pneumatic pressure control, is proposed with its construction and characteristic. Two bellows, which pressure is controlled with electro-pneumatic converter, are 'constructed in each zone of the die as actuators. As a result, the resolution of deformation 1.0μm and the response time 0.4s are obtained in heated condition. Additionally, a decoupling method for the model is proposed, in order to compensate the interactive deformation characteristic which is caused by continuum construction of the lip. Consequently, decoupling accuracy of 1% per full span and 0.6-1.0 μm resolution of deformation are obtained.
公益社団法人精密工学会の論文
1989-12-05