| 摘要 |
<p>Means are provided herein for continuously orienting and transferring a continuous web of thermoplastic material conformally onto the periphery of a polygonal rotating mold from an extruder. The means includes web receiving and advancing means ingesting the web. Web stretching means are provided downstream of the web receiving means for next receiving the web and imparting at least a lateral stretch to the web and advancing the web toward a polygonal rotary mold. Finally, web transfer means are mounted immediately downstream from the web stretching means in peripheral surface following relationship with the polygonal rotating mold for receiving the laterally stretched web from the web stretching means and conformally juxtaposing the stretched web with the peripheral surface of the rotating mold. In this invention, at least one of the web receiving and advancing means and the web transfer means imparts a longitudinal stretch to the web to impart biaxial orientation thereto prior to its conformal juxtaposition with the peripheral surface of the rotating mold. Such system which is provided is very facile and variable with regard to unique and unusual shapes.</p> |
