The objective of this study is to present a new numerical strategy using soft computing techniques to determine the optimal die gap programming of extrusion blow molding processes. In this study, the design objective is to target a uniform part thickness after parison inflation by manipulating the parison die gap openings over time. To model the whole process, that is the parison extrusion, the...

A nually pproximately 12 million metric tons of plastic resins are processed anin the U.S. by more than 7000 plastics processing plants. Many types of resins, chemicals, and additives are combined to produde finished products through a variety of process operations such as adhesives production, coating, extrusion, film and sheet production, foam generation, lamination, and molding. Hughes et al...

Dicarboxylic acids derived from plant oils are attractive intermediates for the synthesis of polymer materials. Similar to polyethylene, the incorporation of long methylene sequences enables polymer crystallization and renders polyesters hydrophobic. Long-chain aliphatic polyesters that incorporate the full length of the plant oil methylene sequences possess high melting points (Tm > 100 °C) an...

Nowadays, there is an increasing interest toward the substitution of oil-based polymers with biobased polymers. Poly(hydroxyalkanoates) (PHAs) emerge as a new class of biopolymers, that have gained more and more attention due to their thermoplastic behaviour, acceptable mechanical properties and biodegradability in compost conditions1. Applications based on PHAs, as a matrix, are generally foun...

Abstract The joining of plastics is required because component geometries are severely restricted in conventional manufacturing processes such as injection molding or extrusion. In addition to established hot plate welding, infrared vibration gas butt welding becoming more and important industrially due its advantages. main benefits the contactless heating process, suitability for glass fiber r...