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    Immersion process for impregnation of resin into preforms
    4.
    发明授权
    Immersion process for impregnation of resin into preforms 失效
    将树脂浸渍到预成型件中的浸渍方法

    公开(公告)号：US6099906A

    公开(公告)日：2000-08-08

    申请号：US100941

    申请日：1998-06-22

    申请人： Raymond J. Palmer ,  Michael B. Palmer ,  Thomas Weege

    发明人： Raymond J. Palmer ,  Michael B. Palmer ,  Thomas Weege

    IPC分类号： B29B15/12 ,  B05D3/00

    CPC分类号： B29B15/125

    摘要： A preform resin immersion process (PRIP) for impregnating resin into a preform for the fabrication of composite structures. The resin contains a heatactivated catalyst and a thixotropic agent which maintain the viscosity of the resin at selected low level during the resin immersion process. The dry preform is placed in an impregnation vessel, and the resin is held in a resin storage vessel, with both vessels initially held at vacuum of about 5.0 mm Hg torr to draw off any air or volatiles. Pressure is introduced into the resin storage vessel, causing the resin to flow through a line into the impregnation vessel which is still held at vacuum conditions. When enough resin is in the impregnation vessel to completely immerse the preform, the flow of resin to this tank is stopped. Once the resin has completely permeated the preform, the resin is drawn back into the resin storage vessel, and the saturated preform is raised up from the impregnation vessel so that the excess resin drips off into collection means. By carefully controlling the thixotropic nature and the viscosity of the resin along with the employment of a latent, heat-activated catalyst, the precisely correct amount of resin remains in the preform after the drip collection step is finished. The saturated preform is then conveyed to a conventional tool for final curing at high temperature and pressure.

    摘要翻译： 用于将树脂浸渍到用于制造复合结构的预制件中的预成型树脂浸渍工艺（PRIP）。 该树脂含有热固化催化剂和触变剂，其在树脂浸渍过程中将树脂的粘度保持在选定的低水平。 将干燥的预成型件放入浸渍容器中，并将树脂保持在树脂储存容器中，两个容器最初保持在约5.0mm Hg乇的真空下以抽出任何空气或挥发物。 将压力引入树脂储存容器中，使树脂通过管线流入仍处于真空状态的浸渍容器中。 当浸渍容器中足够的树脂完全浸没预制件时，停止向该罐的树脂流动。 一旦树脂完全渗透到预成型件中，树脂被拉回到树脂储存容器中，并且饱和预成型件从浸渍容器升高，使得多余的树脂滴落到收集装置中。 通过小心地控制树脂的触变性和粘度以及使用潜热热活化催化剂，在滴液收集步骤结束后，精确校正量的树脂残留在预成型体中。 然后将饱和预成型件输送到常规工具以在高温和高压下最终固化。