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呋喃树脂用作铸型粘结剂始于1950年。在室温下不用外界加热,吹气,利用液体树脂和液态催化剂与砂子混合达到瞬时硬化的“冷芯盒”法,标志着七十年代造芯的最新水平和发展趋势,是国内外十分重视的新工艺之一。英国 Fascold 法,主要采用呋喃树脂作粘结剂,在常温下硬化获得很高强度,具有生产率高、铸件尺寸精确、铸型溃散性好等优点。我厂首先应用在ВП-50/8型空压机阀座、阀盖上(附图1、2)。这两种铸件材料为 HT20—40,重量仅几公斤,但结构
Furan resin used as a mold binder began in 1950. At room temperature without external heating, blowing, the use of liquid resin and liquid catalyst mixed with the sand to achieve instantaneous hardening of the “cold box” method, marking the 70’s core and the latest level of development trend is very One of the new processes that value. British Fascold law, the main furan resin as a binder, hardened at room temperature to obtain high strength, with high productivity, precise casting size, good casting collapse and so on. I first used in the plant in the air compressor seat ВП-50/8, valve cover (with photos 1, 2). The two casting materials for the HT20-40, weighing only a few kilos, but the structure