公开(公告)号：WO1996008362A1

公开(公告)日：1996-03-21

申请号：PCT/US1995011500

申请日：1995-09-13

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  FOLSOM, Michael, E. ,  DIMORA, Paul, M.

IPC: B29C73/02

CPC classification number: B29C33/0044 ,  B29C70/48 ,  B29C73/025 ,  B29C73/28

Abstract: A method and system is provided for repairing a resin-impregnated article having one or more dry spots or resin-depleted areas. A mold release is used to coat all surfaces of the defective article, except for the resin-depleted areas and a border area surrounding and contiguous to each resin-depleted area. The coated article is then placed within a mold cavity defined by a two-piece mold and corresponding in shape and size to the article. A plurality of shims are interposed in the parting line between the two halves of the mold, creating a first gap within the parting line and a second gap between the surfaces of the article and the walls defining the mold cavity. A gasket is also seated between the two halves of the mold to seal the mold cavity, and a vacuum pump is coupled to the mold cavity to evacuate the cavity to a negative pressure. Heated, substantially degassed resin is then injected into the mold cavity, which flows through the second gap over the coated surfaces of the article and into the resin-depleted areas to impregnate the depleted areas. The shims are then removed and the two halves of the mold are brought into engagement to substantially close the first and second gaps and squeeze excess resin from the mold cavity. The article is then heat treated within the mold cavity to cure the impregnated resin.

Abstract translation: 提供了一种用于修复具有一个或多个干斑或树脂贫乏区域的树脂浸渍制品的方法和系统。 除了树脂耗尽区域和每个树脂耗尽区域周围和邻近的边界区域之外，使用脱模剂来涂覆缺陷制品的所有表面。 然后将涂覆的制品放置在由两片模具限定的模具腔内，并且在形状和尺寸上对应于制品。 多个垫片插入在模具的两个半部之间的分型线中，在分型线内产生第一间隙，并且在制品的表面和限定模具腔的壁之间形成第二间隙。 垫圈也位于模具的两个半部之间以密封模腔，并且真空泵联接到模腔以将空腔抽空到负压。 加热后，基本上脱气的树脂然后被注入到模腔中，模腔通过第二间隙流过制品的涂覆表面并进入树脂耗尽的区域以浸渍贫化区域。 然后移除垫片，使模具的两个半部进入接合状态，以基本上封闭第一和第二间隙，并从模具腔挤出多余的树脂。 然后将该制品在模腔内进行热处理以固化浸渍的树脂。