on 02/25/2015

Special Prize
National Kaohsiung University of Applied Sciences
Applying MCM Process in Thick Lens Design

Thick wall processing issues which can include sink marks, voids/bubbles, jetting marks and longer cooling times. The visual defects are caused by a bigger mold cavity space and part shrinkage induced by the solidified plastic melt; longer cooling times are generally a result of the poor thermal conductivity caused by the uneasy heat dissipation within the thick wall sections of the part.

This study features an optical lens with a heavier thickness design of 12mm. The concept of MCM sandwich molding was implemented in the form of B-A-B molding sequence layer design. Moldex3D’s MCM analyses were utilized to study the appropriate thickness design for A and B layers in order to achieve the shortest cooling time.


  • Cooling time were drastically shortened by 50-60% after changing the thickness of A layer to twice as thick of B layer.

Software used:

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