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    • 2. 发明申请
    • Mold fixture to densify composite beam key using resin transfer molding
    • 模具夹具使用树脂传递模塑致密化复合梁钥匙
    • US20060197244A1
    • 2006-09-07
    • US11073907
    • 2005-03-07
    • Allen SimpsonMark La ForestSlawomir FryskaRoger KlinedinstRobert De Ferbrache
    • Allen SimpsonMark La ForestSlawomir FryskaRoger KlinedinstRobert De Ferbrache
    • C01B31/00
    • B29C70/48B29C48/00B29C48/05
    • A resin transfer molding (RTM) apparatus (10) that includes: an extruder (4); at least two mold cavities (15) contained within a mold (16, 18) in the apparatus, arranged so that resin can be extruded from the extruder (4) into the mold; a nozzle (20) for delivering resin from the extruder (4) into the mold; runners (25) in the body of the mold to deliver resin from the nozzle (20) to a mold cavity (15) within the mold; a venting area (29) contiguous to each mold cavity to permit gases to escape from the mold cavity (15) when the mold cavity is infiltrated with resin; and a press (12) to force the mold (16, 18) closed during at least resin injection. An advantageous feature of the present invention is that the mold may be configured to accept a part (19) that is characterized by variations in length, width, and/or thickness, such as a wheel beam key. Also, an RTM process. The process includes: placing a porous preform, e.g., a wheel beam key preform, that is characterized by variations in length, width, and/or thickness into a mold held in a press; injecting a molten resin or pitch into the mold, wherein an extruder is used for injecting the resin; allowing the resin to cool below the melting point; and removing the impregnated preform from the mold. This process is especially adapted for processing fibrous preforms, carbon fiber preforms, nonwoven preforms, random fiber preforms with binder, and foam preforms.
    • 一种树脂传递模塑(RTM)装置(10),包括:挤出机(4); 包含在设备中的模具(16,18)内的至少两个模腔(15)被布置成使得树脂可以从挤出机(4)挤出到模具中; 用于将树脂从挤出机(4)输送到模具中的喷嘴(20) (25)在模具的主体中以将树脂从喷嘴(20)输送到模具内的模腔(15); 与模具腔相邻的通气区域(29),以在模腔被树脂渗透时允许气体从模腔(15)逸出; 以及在至少树脂注射期间迫使模具(16,18)封闭的压力机(12)。 本发明的一个有利的特征在于,模具可以被配置为接受特征在于长度,宽度和/或厚度的变化的部分(19),例如轮梁键。 另外,一个RTM过程。 该方法包括:将长度,宽度和/或厚度变化的多孔预成型件,例如轮梁键预制件放置在保持在压机中的模具中; 将熔融树脂或沥青注入模具中,其中使用挤出机注射树脂; 使树脂在熔点以下冷却; 并从模具中去除浸渍的预成型件。 该方法特别适用于处理纤维预制件,碳纤维预制件,非织造预制件,带粘合剂的无规纤维预制件和泡沫预制件。