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    • 3. 发明授权
    • Apparatus for making biaxially stretched tubular films
    • 用于制造双轴拉伸管状膜的装置
    • US4279580A
    • 1981-07-21
    • US105227
    • 1979-12-19
    • Kohtaro HayashiKo MoriharaKohji Nakamura
    • Kohtaro HayashiKo MoriharaKohji Nakamura
    • B29C49/00B29C55/00B29C55/16B29C55/26B29C55/28B29D23/04B29F3/08
    • B29C55/16B29C55/28
    • An apparatus for producing biaxially stretched tubular films which enables heating air for stretching to pass uniformly around the circumference of a stretching bubble thereby to effect stabilized operation. Said apparatus comprises 1 a circular hood fitted to the section where a loaded raw film starts stretching and a formed stretching bubble expands to its maximum diameter, 2 holders for a plurality of rolls, which holders are mounted on the lower part of said hood, said rolls being held each on the end of said holders which an elasticity allowing swinging of said rolls only in the direction radial to the central axis of said bubble but resistant to being distorted in the direction of circumference of said stretching bubble, and 3 a flexible and shrinkable cylindrical sheet attached to and along the inside lower surface of said hood, the lower end of said sheet being situated immediately above the roll part of said holders.
    • 一种用于制造双轴拉伸管状膜的装置,其使得用于拉伸的加热空气在拉伸气泡的周围均匀地通过,从而实现稳定的操作。 所述装置包括1个安装在装载的原料膜开始拉伸并且形成的拉伸气泡膨胀到其最大直径的部分的圆形罩,2个保持器用于多个辊,该保持器安装在所述罩的下部,所述保持器安装在所述罩的下部, 辊被保持在所述保持器的端部上,弹性允许所述辊仅在径向于所述气泡的中心轴线的方向上摆动,但是能够在所述拉伸气泡的圆周方向上变形,以及3柔性和 可收缩的圆柱形片附接到所述罩的内侧下表面,所述片的下端位于所述保持器的辊部的正上方。
    • 6. 发明授权
    • Method and apparatus for making biaxially stretched tubular films
    • 制造双轴拉伸管状薄膜的方法和装置
    • US4341729A
    • 1982-07-27
    • US105220
    • 1979-12-19
    • Kohtaro HayashiKo MoriharaKohji Nakamura
    • Kohtaro HayashiKo MoriharaKohji Nakamura
    • B29C55/00B29C49/00B29C55/26B29C55/28B29D7/24
    • B29C55/28
    • An apparatus for making biaxially stretched tubular films of thermoplastic synthetic resin which permits operation in a stabilized manner and economically by using the hot air used in stretching a bubble again in heating a raw film. In said apparatus, a suction ring is provided in the section where a heated raw film is inflated by the gas filled therein under pressure, and the diameter of the resulting stretched bubble reaches its maximum diameter. The suction ring sucks the air used for heating the stretching part simultaneously with the air used for cooling it after stretching to attain a thermal interception effect between the stretching part and the cooling part after stretching. Air flow around the stretching bubble is made uniform.
    • 一种用于制造热塑性合成树脂的双轴拉伸管状膜的装置,其允许以稳定的方式操作,并且通过在加热原料膜中再次使用用于拉伸气泡的热空气而经济地进行操作。 在所述装置中,在加压的原料膜被加压的气体填充的部分中设置有吸入环,所得到的拉伸气泡的直径达到其最大直径。 吸引环吸引用于加热拉伸部的空气与拉伸后的冷却用空气同时拉伸,从而在拉伸后得到拉伸部和冷却部之间的热拦截效果。 拉伸气泡周围的气流均匀。