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How To Ultrasonically Weld Plastic In 3 Simple Steps

How To Ultrasonically Weld Plastic In 3 Simple Steps
29/05/2018

Plastic welding is the process of making a molecular bond between two thermoplastics that are compatible, which when cooled return to a solid form.

One straight forward process for doing this is ultrasonic plastic welding. Whatever the specifics of a particular application, ultrasonic welding's fundamentals always remain the same, employing sound waves that are ultra-high in frequency, plastic can be heated with the ensuing friction, creating a strong bond.

Ultrasonic Welding In 3 Quick Steps: 1.Start with two plastic components. Insert these into the location nest or an anvil to hold them firmly in place, if the parts are free to move during welding then you could loose amplitude creating a variable and poor quality weld.

2.A horn or sonotrode is then applied using pneumatic force to the components. Meanwhile, a wave of ultra-high frequency sound is created with the help of an ultrasonic stack. In general this comprises of three parts: the sonotrode, a transducer, and a booster.

3.When the weld has been completed, the cooling phase begins with the stack momentarily remaining on the parts while force is applied to the cooling parts. This phase should only take one second or even less.

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