Abstract
A helical static mixer was introduced into the runner system of a convex-concave circular disc mold and simulated using Moldex3D. The set-up was tested with two mixers with the same diameter, length, and pitch but different mixer element thickness as well as various polymer resins with different rheological properties. The maximum sprue pressure rose with increasing mixer thickness but stayed within normal machine capabilities. Overall, simulations with the thin mixer exhibited improvements regarding melt homogeneity and part quality for polymers such as polyamide 6 (PA6), polycarbonate (PC), and poly-propylene (PP), while the thick mixer had a neutral or negative effect on the same properties. The fiber analysis showed a decrease in fiber alignment in runs including a mixer. Polymers with more extreme rheological properties, such as polybutylene terephthalate (PBT) and polymethyl methacrylate (PMMA), revealed unsatisfactory results.
Original language | English |
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State | Published - 2021 |
Externally published | Yes |
Event | 2021 SPE Annual Technical Conference, ANTEC 2021 - Virtual, Online Duration: 10 05 2021 → 21 05 2021 |
Conference
Conference | 2021 SPE Annual Technical Conference, ANTEC 2021 |
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City | Virtual, Online |
Period | 10/05/21 → 21/05/21 |
Bibliographical note
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