Rapid control of mold temperature during injection molding process

Journal Article · Fri May 22 04:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4918490· OSTI ID:22391874

Liparoti, Sara; Titomanlio, Giuseppe ^[1]; Hunag, Tsang Min; Cakmak, Mukerrem ^[2]; Sorrentino, Andrea ^[3]

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1. Department of Industrial Engineering, University of Salerno Via Giovanni Paolo II, 132, 84084 Fisciano (Italy)
2. Department of Polymer Engineering, The University of Akron, Akron, OH 44325 (United States)
3. Institute for Polymers, Composite and Biomaterials (IPCB) - CNR, P. Enrico Fermi 1, 80055 Portici (Italy)

The control of mold surface temperature is an important factor that determines surface morphology and its dimension in thickness direction. It can also affect the frozen molecular orientation and the mold surface replicability in injection molded products. In this work, thin thermally active films were used to quickly control the mold surface temperature. In particular, an active high electrical conductivity carbon black loaded polyimide composites sandwiched between two insulating thin polymeric layers was used to condition the mold surface. By controlling the heating time, it was possible to control precisely the temporal variation of the mold temperature surface during the entire cycle. The surface heating rate was about 40°C/s and upon contact with the polymer the surface temperature decreased back to 40°C within about 5 s; the overall cycle time increased only slightly. The effect on cross section sample morphology of samples of iPP were analyzed and discussed on the basis of the recorded temperature evolution.

• OSTI ID: 22391874
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1664; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON BLACK
CONTROL
ELECTRIC CONDUCTIVITY
FILMS
HEATING RATE
LAYERS
MOLDING
MORPHOLOGY
ORGANIC POLYMERS
SURFACES