Thermal comparison of conventional and conformal cooling channel designs for a non-constant thickness screw cap

Eric Dimla, Josep Rull-Trinidad, Andres Amador Garcia-Granada, Guillermo Reyes

Research output: Indexed journal article Articlepeer-review

2 Citations (Scopus)

Abstract

Complex parts are manufactured with high production rates using plastic injection. Defects in injection moulded parts are typically caused by non-uniform cooling. The design of cooling channels is a key step in the mould tool design process. Laser sintering allows for the direct fabrication at reasonable price, complex 3D tools with integrated cooling channels without the need of fixtures. This technique allows the designer to optimise the position of cooling channels relative to the heat source. This paper presents a simulation study for a non-constant thickness threaded screw cap. Results comparing conventional to conformal cooling channel show that the range between the highest and the lowest part surface temperatures is reduced by 18.8%. On the other hand, there is only a decrease of 3.9% for the maximum temperature in the interior of the threaded screw cap. Conformal cooling using laser sintering in tool manufacturing achieves an improved heat transfer leading to a better part quality.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalJournal of the Korean Society for Precision Engineering
Volume35
Issue number1
DOIs
Publication statusPublished - Jan 2018

Keywords

  • Additive manufacturing material
  • Conformal cooling design
  • Injection moulding
  • Thermal analysis

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