As well as the shape of the moulding, the information about material provided by the manufacturers of the raw materials can also be referred to for a first general assessment of the ultrasonic welding response of thermoplastics. Of this data the following items permit approximate conclusions to be drawn about the welding response.

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Prior to deciding on the joint design for a particular material/component, it is necessary to have an appreciation of the factors which determine the specific type of equipment to be used. What then are the parameters that need to be considered when proposing ultrasonic welding for an assembly?

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One of the leading plastic welding machine manufacturers in the world is CEMAS. Based in Carmgnola, Italy, this company has been producing thermoplastic welding equipment since 1982. This company is on the radar of many a design engineer, and for good reason; CEMAS have been pioneering the vibration welding world for over thirty years. At Xfurth we are proud to be official UK distribution partners for CEMAS, covering sales, service and support of all offered thermoplastic welding technologies.

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The vibration welding of plastic components has been around for several decades, and is a proven, flexible and efficient process for joining thermoplastic components. Still, many misconceptions about vibration welding equipment abound. This article will attempt to clarify some of the most common misunderstandings.

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Vibration welding is a cost-effective thermoplastic welding process that works well in a variety of circumstances. A vibration welding machine horizontally vibrates the faces of two components together under a constant pressure to produce friction and thus heat. It is this heat that creates the weld that joins the two parts together. Vibration welding allows for precise control over the amount of frictional movement produced (amplitude), giving accurate and repeatable results. It is therefore the preferred welding method for many components, from small or curved through to large automotive components of a complex geometry.

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