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塑料焊接原理

如何選擇超聲波塑料焊接設備（二）

前文有提到在选取正确的可焊接材料后，不仅要根据材料的种类和産品的形状，而且要根据産品的成本，选择合适的焊接方法，根据不同的加热和软化方法选择不同的焊接方法：

一、用機械運動軟化和完成焊接的方法。
机械运动焊接是一种自动焊接过程，需要特殊的焊接设备。一旦确定了正确的焊接参数，操作人员就可以稳定生产。本实用新型具有焊接速度快、焊接灵活、焊接过程稳定、不需要焊剂或保护气体、不含有害气体或渣等优点，保证了産品的焊接质量。根据运动轨迹可分为直线和旋转变换：直线可用于直线焊接和平面焊接，旋转变换可用于圆形焊缝的焊接。塑料的接触部分被两个部分在压力下产生的摩擦热熔化和软化，直到它牢固地凝结。

1. 超聲波焊接

超聲波焊接是由信号发生器产生高频正弦波信号，通过换能器转换成高频机械振动能，再经由变幅杆及焊头将放大后的振动耦合到被焊接塑料件上，高压下的高频摩擦使塑料接触面瞬间产生高温熔化，超声波停止之后，经短暂保压冷却后的两个塑料件便焊接为一体，焊接过程一般不超过一秒钟，焊接强度可与本体媲美，广泛应用于电子电器、汽车配件、包装、塑料玩具、文具用品、日用品、工艺品、化妆品等各个行业。焊接塑料制品时，既不要添加任何粘接剂、填料或溶剂，也不消耗大量热源，具有操作简便、焊接速度快、焊接强度高、焊件美观、生产效率高等优点。另外，超聲波焊接工艺还可实现塑料与金属件的铆接。因此，超聲波焊接技术得到越来越广泛的应用。

灵科-超声波塑焊机

2.旋轉摩擦焊接

通過工件的相對高速旋轉摩擦，將機械能轉化爲熱能，使焊接工件表面的摩擦在熔化後加熱和加壓，使機械能焊接在一起。該工藝不受工件尺寸和材料的限制，焊接強度高于其他塑料焊接工藝，幾乎接近塑料體的強度。適用于旋轉工件的焊接，如濾芯、塑料杯、浮球、玩具球、蓮花頭等。

旋轉摩擦焊接机

如何選擇超聲波塑料焊接設備（三）

如何選擇超聲波塑料焊接設備（一）

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