Overview: The majority of everyday products contain a joint of some description, with even small items such as mobile phones incorporating over 100 joints. Polymers and thermoplastic composites can be joined by welding, adhesive bonding and mechanical fastening. The choice of process is affected by the material to be joined, the joint configuration, the strength of joint required, the level of seal required, the process cost and speed, and the production quantity. Welding processes rely on heat at the joint to melt the adjacent polymer, with a weld forming on cooling. Therefore, welding is only an option with thermoplastic polymers and composites, whilst thermoset systems must rely on adhesives bonding or mechanical fastening to join them.
Plastic welding applies to most of if not all industry sectors and applications include household goods, under bonnet components and medical devices to name a few.
There are around 20 different methods of welding plastics, which can be split into three general classifications:
- Techniques employing an external heat source
- Techniques where heat is generated by mechanical movement
- Techniques which directly employ electromagnetism.
The webinar will provide the attendees with an overview of different welding and joining processes, whilst two failure investigation case studies will be examined and suitable techniques for assessing weld quality will be discussed.
Speaker: Dr Farshad Salamat-Zadeh CEng MWeldI
Speaker Biography: A Chartered Polymer and Adhesive Engineer, with 24 years of B2B, consultancy and project management experience. Dealing with material selection, joining and manufacturing issues related to oil & gas, automotive, transport, defence, aerospace, medical and other industrial market sectors.
Holder of a BSc honours (2:1) degree in Polymer Engineering, MSc in Advanced Manufacturing Systems and PhD in Joining Technology. Having hands on experience with polymer processing, production engineering, relevant joining and plastic welding processes, as well as composite fabrication and applications of adhesives, sealants, coatings, and associated surface treatments. He is TWI’s leading failure investigator of polymers, adhesives, coatings as well as composite pipes, composite wrap and shrink sleeve systems for metallic and non-metallic pipes.
Dr Salamat-Zadeh also helped to developed three training courses and is the course coordinator of: “Welding of Moulded Plastic Components”, “Adhesive Bonder Course”, and “Polymer Science and Technology”.
Continuing Professional Development (CPD): Attending this event supports your professional development. You can claim 2 CPD points per hour for this event. As a member of the Welding Institute you can record your CPD activity online from your membership portal.