Cooling apparatus used in molding inflation film

Abstract

Abstract PURPOSE:To obtain a good quality film, by arranging, in addition to a cooling ring having a parallel flow type blowing aperture, a cooling ring that is positioned below the first mentioned cooling ring and has a counter flow blowing aperture and a suction cooling ring that is situated between the second mentioned cooling ring and a die to oppose its push stream. CONSTITUTION:A suction cooling ring 3 is arranged that is provided with a horizontal suction aperture in the inner circumference for sucking an inflation film 1 from the annular die to expand it diametrically, a first blowing cooling ring 4 having the inwardly downward blowing aperture for blowing a cooling gas to the outer circumferential surface of the film in a direction opposite to the direction of the movement of the film is arranged over the suction cooling ring 3, and a second blowing cooling ring 5 for blowing a cooling gas in parallel with the direction of the movement of the film is arranged near and over the first belowing cooling ring 4. When the widths of the apertures at blowing sections are defined as E1 and E2, the flow rates of the cooling current are defined as V1 and V2, and the blowing angles are defined as alpha, beta, the following formulae must be satisfied.

Inventors

• 👤 Katsuhiko Fujimori
• 👤 勝彦 藤森
• 👤 Toshiharu Futasugi
• 👤 二杉　俊治
• 👤 Hideyo Rouyama
• 👤 蝋山　英世
• 👤 Shiro Utsuki
• 👤 宇津木　史朗
• 👤 Tetsuo Watanabe
• 👤 哲夫 渡辺
• 👤 Terukazu Kiyota
• 👤 清田　輝一
• 👤 Aritsune Moriyama
• 👤 森山　有恒

Bibliographic Details