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Verification of Selected Grade

These two factors are interrelated, as the material needs to be processed before the evaluation can be carried out. Successful casting may require adjustments to the mold, processing conditions, and postcuring operations. Dimensional testing should be carried out at this point to check the need for any mold alterations that may be required. [Pg.164]

Prior to any production for complex and critical applications, theoretical calculations should be carried out to assess the properties of the selected grade. Computerized mathematical techniques such as finite element analysis can be carried out to determine potential stress points. There are also mold-filling programs that can be used. Both these methods are expensive and need specialized staff. [Pg.164]

The evaluation process consists of several stages, with reassessment if the initial results are not satisfactory. The molding process or the grade of polyurethane may need to be changed. This may have to be repeated when service tests are carried out. [Pg.164]


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Verification

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