Plastics Design Principles: Theory and Concepts

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The Moldflow Design Principles are a set of ruleMoldflow Plastics Design Guides that influence the design of a part and tools to optimize the filling of a part. When these principles are followed, higher quality parts and faster cycle times are the result. Not following these plastics design principles leads to problematic designs.

These plastics design principles include:

Unidirectional and controlled flow pattern
Flow balancing
Constant pressure gradient
Maximum shear stress
Uniform cooling
Positioning weld and meld lines

Avoid hesitation effects
Avoid underflow
Balancing with flow leaders and flow deflectors
Controlled frictional heat
Thermal shutoff for runners
Acceptable runner/cavity ratio

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