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Moldflow Shrinkage & Warpage Analysis

Warpage occurs when there are variations of internal stresses in the material caused by a variation in shrinkage. Warped parts may not be functional or visually acceptable.

  • Non-uniform cooling.

    Temperature differences from one side of the mold to the other can lead to layers freezing and shrinking at different times and generating internal stresses.

  • Inconsistent shrinkage.

    Resulting from:
    1. Material variations such as property variations, Fillers, varying moisture content, inconsistent melt and pigmentation;
    2. Process conditions variations such as inconsistent packing and varying mold and melt temperatures;
    3. Machine variations such as a damaged check ring and unstable controller.

moldflow analysis consultants - Shrinkage and Warpage Analysis Part Shrinkage

Click to View

Click to view Moldflow Warpage Analysis Results. - Shrinkage results indicate isotropic shrinkage throughout the part based on the material and process conditions selected.

MPI/Warp calculates shrinkage and warpage in injection molded plastic parts and predicts where deformations will occur.

Results allow Imtech to optimize design, material, and processing parameters to control part warpage before the mold is built.

 

moldflow analysis consultants - Shrinkage and Warpage Analysis
Deflection Results

Click to View

Click to view Moldflow Warpage Analysis Results.  Warp results show deflection throught the X, Y and Z Axis.  The result shown is a real life example of a glass filled PP Auto Battery Case with 27 mm inward bow of the side walls.

With MPI/Warp, even the most demanding application that requires high dimensional stability, excellent visual appearance, and accurate fit with mating components can be produced to quality, time, and budgetary specifications.

In mold compensation is also possible. By exporting a inverse model from Moldflow toolmakers are able to compensate for unavoidable distortion in the mold.

mould flow analysis consultants - Shrinkage and Warpage Analysis, imtech design - mold flow engineers and consultants.

Shrinkage & Warpage Analysis Capability:

Evaluate final part shape before machining the mold

Evaluate both single cavity and multi-cavity molds

Scale shrinkage and warpage results for better visualization of deformation

Query any two points to determine any dimensional change between the two

Constrain the part on a plane for better measurement of deflection

Separate total displacement into X-, Y-, and Z-axis displacements to show only the deflection in each direction

Show shrinkage and warpage as a visible displacement plot or as a color contour or shaded plot

Export warp geometry in the STL format to use as a reference when sizing the mold

Export warp mesh model for an iterative warpage analysis

moldflow analysis consultants - Shrinkage and Warpage Analysis

Shrinkage and Warpage results include:

Total deformation
Deflection in the X-, Y-, and Z-directions
Deflection history at any node
Deflected component shape with exaggeration factor
Buckling mode shape
Elemental parallel and perpendicular shrinkage
Elemental principal residual stress (midplane)
Elemental Mises-Hencky stresses (midplane)
Elemental maximum shear stress (midplane)
Standard results from MPI/Flow, including:
- Volumetric shrinkage
Standard results from MPI/Fiber, including:
- Thermo-mechanical properties of the composite material

Features:

Small Deflection Analysis: Linear Solver


Large Deflection Analysis: Non linear Solver

Geometric non-linear large deflection
Predicts the deformed shape after buckling
Features load or displacement control

Single Variant Analysis: Isolate cause of distortion

Isolates and predicts the effects on warpage components including:
- Molecular/fiber orientation
- Cooling variations
- Shrinkage variations
- Corner effects

Moldflow Plastic Adviser, Moldflow Mpi, Mold flow communicator and Mold Adviser are Mould flow software products for simulating the injection molding of plastic materials. Moldflow is the registered trademark Moldflow Corporation & Moldflow Europe ltd as advised in many trade magazine publications and press releases.

Imtech Design are Moldflow Gold Certified Plastic Flow Simulation Consultants and Engineers.


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Moldflow, Filling, Cooling, Warpage analysis, weld lines, flow lines, fiber orientation, polymer flow, rapra, part advisor
Moldflow, Filling, Cooling, Warpage analysis, weld lines, flow lines, fiber orientation, polymer flow, rapra, part advisor
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