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Evaluating the Cooling Efficiency of Polymer Injection Molds by Computer Simulation Using Conformal Channels.

Carlos Vargas-Isaza1, Adrian Benitez-Lozano2, Johnnatan Rodriguez3

  • 1Grupo Investigación Materiales Avanzados y Energía, Instituto Tecnológico Metropolitano, Medellín 050034, Colombia.

Polymers
|October 28, 2023
PubMed
Summary
This summary is machine-generated.

Conformal cooling channels (CCCs) significantly reduce part warpage in injection molds. This study found CCCs decreased warpage by up to 59.8% in polymer molds and 32.4% in metal molds compared to conventional methods.

Keywords:
additive manufacturingconformal cooling channelscooling efficiencypolycarbonatesimulationsteelwarpage

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Area of Science:

  • Manufacturing Engineering
  • Materials Science
  • Polymer Processing

Background:

  • Injection mold design critically impacts part quality, cycle times, and production volume.
  • Cooling channels are essential for mold performance, influencing cycle time and product quality.
  • Conformal cooling channels (CCCs) offer an advanced alternative to conventional designs by aligning with part contours.

Purpose of the Study:

  • To investigate the effects of CCC geometries on mold temperatures and part warpage.
  • To analyze the influence of design parameters on CCC performance using a design of experiments (DOE).
  • To compare the effectiveness of CCCs against conventional cooling methods for different part geometries and mold materials.

Main Methods:

  • Finite element simulation of CCC geometries.
  • Design of Experiments (DOE) analysis with three factors.
  • Evaluation of circular and square CCC cross-sections.
  • Comparison of steel and polycarbonate mold materials.
  • Analysis of a cup-shaped part and a less rigid geometry.

Main Results:

  • CCC distance to the part and CCC cross-section dimensions significantly affect mold temperatures and warpage.
  • CCCs reduced final warpage by 9.26% for a cup-shaped part in steel molds.
  • For less rigid parts, CCCs reduced warpage by 32.4% in metal molds and 59.8% in polymer molds.

Conclusions:

  • CCCs demonstrate superior performance in reducing part warpage compared to conventional cooling channels.
  • The effectiveness of CCCs is dependent on geometric factors and mold material.
  • CCC technology offers significant potential for improving injection molding efficiency and product quality.