可溶性聚四氟乙烯曲面焊接工艺的研究

Research on the Welding Process of PFA Curved Surface

以可溶性聚四氟乙烯(PFA)为研究对象,针对曲面形状的塑料焊接难题,展开了PFA曲面焊接工艺研究。阐述了对于PFA曲面形状的塑胶件进行焊接的难点以及焊接工艺,分析了焊接距离、加热温度、环境温度、空气流动性、热传递方向、曲面受热方式等影响曲面无缝焊接效果的主要因素。结果表明:在无风或者真空环境下,环境温度为30℃,设定加热距离为2 mm、加热温度为450℃,曲面加热板设置为4层内外圈不同功率相互补偿的方式,待焊接的PFA产品采用上下水平方向安装,可以实现曲面无缝焊接。

Taking polyfluoroalkoxy(PFA) as the research object, a study on PFA curved surface welding technology was conducted to address the difficulty of plastic welding with curved shapes. The difficulties and welding processes in welding plastic parts with PFA curved surface shapes were elaborated. The main factors that affect the seamless welding effect of curved surfaces, such as welding distance, heating temperature, ambient temperature, air flow, heat transfer direction, and heating mode of curved surfaces were analyzed. The results show that in a windless or vacuum environment, the ambient temperature is 30 ℃, the heating distance is set to 2 mm, the heating temperature is 450 ℃, the curved heating plate is set to four layers with different power compensations between the inner and outer rings, and the PFA product to be welded is installed in the up and down horizontal direction, which can achieve seamless welding of curved surfaces.