Vibration welding of components with angled areas in the direction of vibration
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RESEARCH PAPER
Vibration welding of components with angled areas in the direction of vibration Sascha Vogtschmidt 1
&
Isabel Fiebig 1 & Volker Schoeppner 1
Received: 8 December 2019 / Accepted: 15 July 2020 # The Author(s) 2020
Abstract Conventional manufacturing processes for plastic products, such as injection molding or extrusion, often limit the achievable component geometries. Therefore, it is necessary to join components in order to generate highly complex geometries. Vibration welding is one way of joining components. This process is frequently used and is characterized by short cycle times, high energy efficiency, and the possibility of joining large components. In vibration welding, plastic components are heated by an oscillating friction movement of the joining surfaces, then plasticized and subsequently welded together. The joining of three-dimensional seam geometries is therefore a challenge for vibration welding, as the components can be lifted off by the linear movement and the surfaces do not plasticize sufficiently. Previous investigations have shown that angles of up to 20° can be welded in the direction of vibration, but that the deviation from the plane considerably reduces the weld strength. In order to weld threedimensional weld seam geometries with short cycle times and simultaneously achieve a high weld seam strength, a process is being developed which is intended to extend the design freedom in vibration welding. Keywords Vibration welding . Infrared welding . Polymer joining
1 Introduction The welding of plastics is often one of the last process steps in the production of plastic products and enables the realization of geometries and functions that cannot be achieved by injection molding and extrusion. The joining processes essentially define the component design. In the often design-oriented products, these geometries partly represent a major limitation, especially when joining processes with short cycle times have
to be selected from an economic point of view. In the development of new products, it makes sense to use a joining process that is flexible and suitable for complex geometries. In the group of plastic welding processes, only hot plate welding and infrared welding offer the necessary degrees of freedom [1, 2] for three-dimensional joining surfaces. In addition to the feasibility of the joining geometry, the cycle time is a decisive factor. In this case, hot plate and IR welding have deficiencies compared with other methods such as ultrasonic and vibration welding.
Recommended for publication by Commission XVI - Polymer Joining and Adhesive Technology * Sascha Vogtschmidt [email protected] Isabel Fiebig [email protected] Volker Schoeppner [email protected] 1
Kunststofftechnik Paderborn, Paderborn University, Paderborn, Germany
2 Motivation The requirements for complex weld seam arrangements and cycle times collide in currently available plastic welding processes. For example, fast welding processes such as ultrasonic or vibration welding is
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