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    • 8. 发明授权
    • Device for smoothing out the thickness of a sheet
    • 用于吸收片材厚度的装置
    • US5229140A
    • 1993-07-20
    • US857185
    • 1992-03-25
    • Guenther CrassSiegfried JanochaHarald Mueller
    • Guenther CrassSiegfried JanochaHarald Mueller
    • B29C47/16B29C47/86B29C47/92
    • B29C47/92B29C47/0019B29C47/0021B29C47/165B29C47/86B29C47/862B29C2947/92152B29C2947/92428B29C2947/92647B29C2947/92704B29C2947/92904Y10S264/46Y10S425/013
    • A device for smoothing out the thickness of a sheet of thermoplastic material which includes a sheet die and a heating device which is integrated with the upper die lip of the sheet die. The heating device includes a hollow box filled with a liquid and a bar which projects laterally beyond the endfaces of the hollow box. The inlet and outlet openings of the bar in the hollow box are sealed. Arranged on the underside of the bar are small hot plates which are electrically heated. The liquid in the hollow box serves as a heat transfer medium and typically is an oil having a boiling point higher than 280.degree. C. The thickness profile of the extruded sheet is controlled, on the one hand, via controlling elements and, on the other hand, remaining thick and/or thin points of the sheet profile are smoothed by the bar of the heating device, in which the bar is progressively moved transversely with respect to the running direction of the sheet across the sheet width with the aid of a motor into a position in which the small hot plates are aligned with the thick/thin points to be smoothed. The corresponding thick/thin points of the sheet are smoothed by exposing the small hot plates to different temperatures or heating powers.
    • 一种用于平滑热塑性材料片的厚度的装置,其包括片模和与片模的上模唇一体化的加热装置。 加热装置包括填充有液体的中空箱和横向突出于中空箱的端面的杆。 中空箱中的杆的入口和出口被密封。 安排在酒吧底部的是电加热的小型热板。 中空箱中的液体用作传热介质,通常是沸点高于280℃的油。一方面通过控制元件控制挤出片材的厚度分布,另一方面 通过加热装置的条来平滑片材型材的剩余厚度和/或薄点,其中杆通过电动机相对于片材的运行方向在片材宽度上横向逐渐移动 进入其中小热板与厚/薄点对准的位置,以使其平滑。 通过将小的热板暴露于不同的温度或加热功率来使片材的相应厚/薄点平滑。