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Plastic Welding: Fabrication of Plastic Parts

SpecialChem / Apr 20, 2008

Prior to fabricating large or small plastic parts, you must familiarize yourself with the materials you will be working with and their requirements. You will also need to understand the customer's wishes and/or needs and make sure they are realistic. The right assembly equipment is also important in order to be efficient and provide a quality, competitively priced product. The equipment you will need is dictated by the volume and part design and also dependent on the plastic materials. Fabricating plastic parts looks easy, but if you review my previous articles, you know that problems can occur. Every plastic material has different physical and chemical properties. To review, there are basically three groups of plastics polymers structures. 1. Amorphous 2. Crystalline 3. Partially (or Semi-) Crystalline Amorphous polymers are softer and have lower melting points. Solvents can penetrate easier than with their crystalline counterparts. Crystalline polymers are rigid and have a higher melting point.

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