Ultrasonic Metal-Plastic Joining
Ultrasonic metal-to-plastic joining is a process where metal parts are embedded into plastics via ultrasonic vibrations. It creates form-locking and force-locking connections.
Physico-Chemical Mechanism of Action
Ultrasonic metal-plastic joining uses high-frequency ultrasonic vibrations to embed metal parts into thermoplastics. The vibrations release mechanical energy that plasticizes the metal and embeds it in the plastic.
Metallurgical Relevance & Welding Risks
This process is especially useful for form-fit joints because it offers high clamping force and leak tightness. However, incorrect settings of the ultrasonic vibrations or excessive temperature can lead to incomplete embedding or deformation of the metal.
Shop Practice & Instructions
To successfully perform ultrasonic metal-plastic joining, follow these steps:
1. Preparation of parts: The metals and plastics must be clean and dry.
2. Adjusting the ultrasonic unit: The frequency and amplitude of the vibrations must be set precisely depending on the materials.
3. Embedding: The metal is slowly introduced into the plastic while being treated with ultrasonic vibrations.
4. Consolidation: After embedding, the joint is consolidated under pressure and temperature to create a tight connection.