Rotational Moulding of Thermosets: Understanding of a Reactive Forming Process

Abstract

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Rotational molding: A review of the models and materials

“…LPSs have a long history of application in RM; beginning with PVC plastisols since the early 1940s, followed later by caprolactams and PU in the 1950s and 1970s respectively [113,114]. Subsequent works investigated and attempted to resolve the problems inherent to these materials, such as uneven material distribution and part porosity [108,[115][116][117][118][119][120]. Throne and Gianchandani [120], identified four flow regimes for a reactive polyester resin: cascading, rimming, stable hydrocyst, and solid body rotation (SBR) (Figure 7).…”

Optimierung der Verbundhaftung von mehrlagigen, rotationsgeformten Bauteilen durch Einbringen einer mehrphasigen Zwischenschicht

“…Neben Polyethylenen werden unter anderem Polyvinylchlorid, Polypropylen oder Polyamide verwendet [1,4,5]. Zudem wurden bereits Untersuchungen durchgeführt, die darauf abzielen, neben thermoplastischen Werkstoffen auch reaktive Systeme mittels Rotationsformen zu verarbeiten [6][7][8].…”

Simulation of polymer flow using smoothed particle hydrodynamics method

“…The first work [] carried out in this field outlined these problems, partly because various states of flow occur in the mold according to the variation of viscosity. Reactive rotational molding (RRM) has several advantages compare to traditional rotomolding of thermoplastic powders: process cycle time is shorter, raw material is less expensive because polymerization occurs during processing, and high‐performance polymers may be used such as thermosets (polyester , polyepoxy , and polyurethane []) and thermoplastic (polyamide 6 []) or blends (polyepoxy/poly(methyl methacrylate) ).…”