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自动门密封条的挤出是一项复杂的工艺。针对这一工艺过程对胶料的特性,提出了一种新的方法,以建立胶料性能与挤出过程期间的膨胀行为之间的相互关系。除了混炼胶性能外,也可确定试品几何形状和硫化温度。介绍了以EPDM混炼胶料在实验室挤出生产线上用物理发泡剂热空气硫化进行的试验,显示了工艺参数对发泡行为的影响。最后提出了物理发泡。在注射段,胶料挟存着氮气或二氧化碳一起被送入注射成型机,为这一目的,已开发出专门的注射嘴。在成型工艺过程,可影响发泡密度和孔眼结构。
Automatic door seal extrusion is a complex process. Aiming at the characteristics of the compound in this process, a new method was proposed to establish the relationship between the compound properties and the expansion behavior during the extrusion process. In addition to the properties of the compound, the geometry of the test piece and the vulcanization temperature can also be determined. The experiment of EPDM vulcanizate with physical blowing agent on the laboratory extrusion line was introduced, and the influence of process parameters on the foaming behavior was also presented. Finally, the physical foam. In the injection section, the compound is fed together with nitrogen or carbon dioxide into an injection molding machine. For this purpose, special injection nozzles have been developed. In the molding process, can affect the foam density and pore structure.