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    • 79. 发明公开
    • A filter & pressure relief assembly
    • Drückentlastungs-und Filtereinrichtung
    • EP0792675A1
    • 1997-09-03
    • EP97301195.0
    • 1997-02-24
    • ILLINOIS TOOL WORKS INC.
    • White, James
    • B01D35/14B29C47/68B29C47/96
    • B29C47/081B01D35/14B29C47/0009B29C47/0815B29C47/68B29C47/681B29C47/96
    • A filter and pressure relief assembly for an adhesive supply unit comprises an adhesive supply hopper (12), a filter basket (20) disposed within a cavity (18) defined within a filter block (16), and a filter plug (22) for retaining the filter basket (20) within the filter block (16). Inlet port (32) provides an infeed of adhesive from the hopper (12), an outlet port (36) leads to an applicator, and a return port (54) and conduit (56) return adhesive back to the hopper (12). The filter plug (22) contains a pressure relief valve (44) which opens and connects the inlet port (32) to the return port (54) and conduit (56) so as to return adhesive to the hopper (12) under over-pressure conditions, and a pair of O-ring members (100, 102) for respectively engaging small and large diameter regions (104, 106) of the cavity (18). A slide plate (66) is movable between three positions (82, 80,78) and is operatively engaged with the filter plug (22) so as to respectively retain the filter plug (22) at a full retention and a partial retention position within the filter block (16), or permit release of the filter plug (22) and the filter basket (20) from the filter block (16). When the filter basket (20) is to be removed from the filter block (16), the slide plate (66) is moved to its second position (80) at which the filter plug (22) moves upwardly within the filter block (16) such that the lower O-ring member (102) disengages the small diameter region (104) of the cavity (18) so as to relieve the pressure within the system and permit adhesive to return to the hopper (12), the upper O-ring member (100) maintaining the sealing of the system. The slide plate (66) is then moved to the release position (78) so as to permit the filter plug (22) and the filter basket (20) to be removed safely from the filter block (16) without any forceful discharge of adhesive from the system.
    • 用于粘合剂供应单元的过滤器和压力释放组件包括粘合剂供应料斗(12),设置在限定在过滤器块(16)内的空腔内的过滤篮(20))和用于 将过滤篮(20)保持在过滤块(16)内。 入口端口(32)提供从料斗(12)进入的粘合剂,出口端口(36)通向施加器,并且返回端口(54)和导管(56)将粘合剂返回到料斗(12)。 过滤塞(22)包含一压力释放阀(44),该压力释放阀(44)将进口(32)与回流口(54)和导管(56)打开并连接,以便在超负荷下将粘合剂返回到料斗(12) 以及用于分别接合空腔(18)的小直径和大直径区域(104,106)的一对O形圈构件(100,102)。 滑动板(66)可以在三个位置(82,80,78)之间移动,并且与过滤塞(22)可操作地接合,以便将过滤塞(22)分别保持在完全保持位置和部分保持位置 过滤块(16),或允许从过滤块(16)释放过滤器塞(22)和过滤篮(20)。 当过滤篮(20)要从过滤器块(16)移除时,滑动板(66)移动到其过滤器塞(22)在过滤器块(16)内向上移动的第二位置(80) ),使得下O形环构件(102)脱离空腔(18)的小直径区域(104),以便减轻系统内的压力并允许粘合剂返回到料斗(12),上O 保持构件(100)保持系统的密封。 然后将滑动板(66)移动到释放位置(78),以允许过滤器塞(22)和过滤篮(20)从过滤块(16)安全地移除,而无需任何强力排出粘合剂 从系统。