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    超声波焊接的的影响因素有哪些?
    2016-8-2 10:50:16
    聚合物结构非结晶聚合物分子排列无序、有明显的使材料逐步变软、熔化 及至流动 的温度(Tg玻璃化温度)。这类树脂通常能有效传输超音速振动并在相当广泛的压力 振幅范围内实现良好的焊接。半结晶型聚合物分子排列有序,有明显的熔点(Tm熔 化温度)和再度凝固点。固态的结晶型聚合物是富有弹性的,能吸收部分高频机械振 动。
    Polymer structure of amorphous polymer molecules arranged disorderly, obviously the material gradually become soft, melting and flow temperature Tg (glass transition temperature). This kind of resin is usually able to transmit the supersonic vibration effectively and realize the good welding in the very wide range of pressure amplitude. Semi crystalline polymer molecules arranged in an orderly manner, there is a clear melting point (Tm melting temperature) and re solidification point. Solid crystalline polymers are flexible and can absorb some of the high frequency mechanical vibrations.
    所以此类聚合物是不易于将超声波振动能量传至压合面,帮要求更高的振幅。需要很高的能量(高熔化热度)才能把半结晶型的结构打断从而使材料从结晶状态变为 粘流状态,这也决定了这类材料熔点的明显性,熔化的材料一旦离开热源,温度有所 降低便会导致材料的迅速凝固。所以必须考虑这类材料的特殊性(例如:高振幅、接 合点的良好设计、与超音夹具的有效接触、及优良的工作设备)才能取得超声波焊接 的成功。
    So this kind of polymer is not easy to the ultrasonic vibration energy transmitted to the pressing surface, help demand higher amplitude. Need very high energy (high heat of fusion) to the semi crystalline structure interrupted so that the material from the crystalline state variable for viscous flow state, which also determines the obvious of the melting point of the material, the molten material once leaving the heat source, the temperature decreased will lead to materials of rapid solidification. Therefore, we must consider the material of this kind of special (for example: high amplitude, ground contact point of good design, and supersonic fixture, and excellent equipment) in order to achieve ultrasonic welding of success.
    聚合物:热塑性与热固性将单体结合在一起的过程称为“聚合”。聚合物基本可分为两大类:热塑性和热固性。热塑性材料加热成型后还可以重新再次软化和成型,基所经历的只是状态的变化而已-这种特性使决定了热塑性材料超声波压合的适 应性。热固性材料是通过不可逆反的化学反应生成的,再次加热或加压均不能使已成 型的热固性产品软化,所以传统上一直认为热固性材料是不适合使用超声波的。
    Polymer: thermoplastic and thermosetting monomer combined process is called polymerization". The polymer can be divided into two major categories: thermoplastic and thermosetting. After heating the thermoplastic material, it can be re softened and formed again. The base undergoes only the change of the state. Thermosetting material is generated by chemical reaction of not rebellious, again heat or pressure can make is softening type of thermoset products, so traditional always think thermosetting material is not suitable for the use of ultrasonic.
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    This article from the automatic ultrasonic cleaning machine to provide help, more relevant content, please click: http://www.sinokohl.com/ we will be the details for you to answer!