This help topic specifies the results for an Injection-compression molding or compression molding analysis.
The following table lists the text results generated for an Injection-compression analysis.
Results |
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Analysis log |
Results Summary |
Illustration of V1 and V2 in Filled Volume %
The filled volume (FV) %, at any given time, then, is given by the equation:
FV = V1 / V2 * 100
In compression molding analyses, the initial polymer charge volume will be close to, or greater than, the volume required to fill the part. The Filled Volume % will therefore be close to, or greater than 100%. This simply means that there is more polymer available than is required to fill the part. It does NOT mean the part is filled.
In injection-compression molding analyses, the initial polymer charge volume with be close to zero (0). The Fill Vol % will, therefore, be close to zero (0).
As the press moves down and approaches the end of the press open distance, and the pressure on the polymer increases, the density of the polymer increases which reduces the Filled Volume %. Thus, in compression molding analyses, the Filled Volume % at the start of the analysis could be greater than the Filled Volume % at the end of the analysis.
At the start of the analysis, the part mesh is stretched upward to accommodate the polymer charge and provide a representation of the compression press surface. The nodes in contact with the initial charge, shown in red, are considered to be filled at time t=0, and the Filled Nodes % result is equal to zero (0).
Illustration of the node filling process
As the press moves down, the mesh is returned to the part shape, and the polymer is displaced into the part mesh, including sideways if there is space. During this process, the nodes that are stretched over the polymer charge slowly revert to their original positions, and additional nodes are filled. The Filled Nodes % result indicates the percentage of additional nodes that have filled since time t=0.
For more information about a result, including how to interpret the display, click on the result name.
Result | Available for mesh type |
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Press force XY Plot |
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Press displacement XY Plot |
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Press speed XY Plot |
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Cavity volume:XY Plot |
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Compression surface property result |
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