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    • 2. 发明授权
    • Apparatus for manufacturing tubular films of thermoplastic resins
    • 制造热塑性树脂薄膜的装置
    • US3635634A
    • 1972-01-18
    • US3635634D
    • 1968-08-05
    • MITSUBISHI PLASTICS IND
    • NAGANO HIROSHITOMIOKA HIDEOYAMATAKA AKIRAYOSHIDA HIROHIKO
    • B29C47/00B29C47/34B29D23/04
    • B29C47/34B29C47/0026B29C47/0057B29C47/0059
    • In an apparatus for manufacturing a tubular resinous film wherein a tubular film of a thermoplastic film is extruded from an extrusion nozzle, cooled, heated, expanded and wrapped into a roll, a circumferential twist is intermittently imparted to the tubular resinous film after it is cooled but before it is heated and expanded, or circumferential twists in the opposite directions are imparted alternately, by means of cooperating inner and outer rollers which are revolved in the circumferential direction of the tubular resinous film. Means to cool the extruded tubular resinous film comprises a first stationary cooling cylinder having a diameter slightly smaller than the inner diameter of the tubular resinous film, a second rotary cooling cylinder having a diameter slightly larger than that of the first cooling cylinder and adapted to contact and cool the inner surface of the extruded tubular resinous film, and means to form a layer of cooling gas between the inner surface of the extruded tubular resinous film and the periphery of the first cooling cylinder.
    • 在用于制造管状树脂膜的装置中,其中将热塑性膜的管状膜从挤出喷嘴挤出,冷却,加热,膨胀并卷绕成卷,在冷却后,间歇地向管状树脂膜施加周向扭转 但是在加热膨胀之前,或者通过在筒状树脂膜的圆周方向上旋转的配合的内侧和外侧辊交替地赋予相反方向的周向扭转。 用于冷却挤压的管状树脂膜的装置包括直径略小于管状树脂膜的内径的第一固定冷却缸,具有比第一冷却缸的直径稍大的直径的第二旋转冷却缸, 冷却挤出的管状树脂膜的内表面,并且在挤出的管状树脂膜的内表面和第一冷却缸的周边之间形成冷却气体层的装置。