阻燃输送带生产 工艺流程：干燥→塑炼→合炼→混炼→停放→热炼→压延→成型→硫化→包装。与非尼龙骨架输送带有所不同，尼龙分层难燃输送带生产工艺硫化后要经过二次拉伸定型处理。二次拉伸定型主要有两种方法，一种是模内压力下冷却定型方法（以下简称模内定型），另一种是模外拉伸冷却定型方法（以下简称模外定型）。模内定型方法简单，定型效果好。但是采用这种方法定型能耗大，生产效率低。相比之下模外定型方法虽然须多一套拉伸装置，但是采用这种方法后产品质量可靠，生产效率高，适于大批量规模生产。

The production process of flame retardant conveyor belt: drying, refining, blending, mixing, mixing, parking, hot rolling, rolling, molding, vulcanizing and packaging. With non nylon skeleton conveying with different, nylon layered refractory conveyor belt production process, after vulcanization, after two times drawing stereotypes processing. There are two main methods for drawing two times, one is cooling molding method under mould pressure (hereinafter referred to as mold setting), and the other is die drawing, cooling and shaping method (hereinafter referred to as die setting). The die setting method is simple and the shaping effect is good. However, this method is characterized by high energy consumption and low production efficiency. In contrast, the die setting method needs a set of stretching devices, but the quality of the product is reliable and the production efficiency is high. It is suitable for mass production.