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一、概况随着塑料工业的发展,美、日及欧洲各国普遍用PVC包层保护电气配线软管,取代了无塑料保护层的金属软管。它除具有普通裸体金属软管的优点外,还具有安全、防水、防尘、防蚀、耐热、耐振动、不易脱节、柔软性好、结构新颖,用途广泛,连接方便等优点。我国生产的镀锌金属软管,由于没有解决包塑层的技术,影响了机床出口配套。1980年为了贯彻一机部JB2738-80标准,
I. Overview With the development of the plastics industry, the United States, Japan and European countries generally use PVC cladding to protect electrical wiring hoses instead of metal hoses without plastic protective layers. In addition to its advantages of ordinary nude metal hose, it also has the advantages of safety, waterproof, dustproof, corrosion resistance, heat resistance, vibration resistance, easy disconnection, good flexibility, novel structure, wide range of uses, and convenient connection. The production of galvanized metal hoses in China, due to the lack of technology to solve the plastic layer, affecting the machine tool export support. In order to implement the JB2738-80 standard in 1980,