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为了防止油库通风管道连接处漏气及避免油雾蒸汽排放造成安全事故,必须用一种厚4mm的橡胶石棉垫作为中间接口密封垫。其形状见图1。 该零件所用材料是双面有0.1mm橡胶膜的石棉板,其抗剪强度为39MPa。由于零件尺寸较大,而所需变形力又不大,若用常规钢模制造,成本高、耗材多、不经济。若用钢线模切割石棉垫法兰,则有结构简单、成本低等优点。模具结构见图2。
In order to prevent leakage at the connection of oil depot ventilation ducts and to avoid safety accidents caused by oil mist and steam emission, a 4mm thick asbestos rubber gasket must be used as the intermediate interface gasket. Its shape is shown in Figure 1. The material used for this part is a asbestos board with a 0.1mm rubber film on both sides and a shear strength of 39MPa. As part size larger, and the required deformation force is not large, if the conventional steel mold manufacturing, high cost, supplies more, not economical. If the steel wire die cutting asbestos pad flange, then the structure is simple, low cost and so on. Mold structure shown in Figure 2.