Shore A Versus Shore OO for Silicone: Why Direct Conversion Fails
Different hardness scales use different test systems. A converted value is not a direct finished-part measurement; empirical relationships …
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Measurement, Quality & Procurement
Align evidence and decisions for soft-part measurement, sampling, first articles, changes, containment, quotations and delivery records. Agree methods and release responsibilities per project.
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Conditioning Silicone Before Inspection: Temperature, Time and History
A consistent preinspection state improves comparison, but conditioning must follow the agreed product and method. Do not alter temperature …
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Passing Overall Means but Assembly Failures: Separate Mold Cavities
An acceptable batch mean can hide persistent cavity differences. Group data by cavity and period before discussing overall statistics.
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Zero Defects in a Sample: Understanding the Binomial Upper Bound
Finding no defects does not prove a defect-free lot. Under explicit sampling assumptions, a probability model describes evidence strength; …
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Silicone Dimensions at Tolerance Limits: Rounding and Decision Rules
Apply agreed precision, rounding and uncertainty rules to borderline dimensions. Do not choose favorable decimal places after seeing result…
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Flatness of Thin Silicone Gaskets: Free Warpage and Installed Contact
Free-state warpage and compressed sealing contact are different evaluations. Define appearance, installability and function separately; han…
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Measuring Small Silicone Ring IDs: Taper Gauges Versus Free Size
Insertion force and position on a taper gauge or mandrel can stretch a small ring. Define whether the result represents functional fit or f…
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Go/No-Go Pin Gauges in Silicone Holes: Force and Functional Fit
A soft bore can expand around a pin. Define insertion force and state; pushing a gauge through does not establish free bore size or reliabl…
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Calipers Underreading Silicone Thickness: Force and Contact Area
A low caliper reading may reflect compression or a real size difference. Separate them with controlled methods. More display resolution doe…
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Drawing Datums for Soft Silicone Parts: Free and Restrained States
Define support and restraint with dimensional datums instead of copying rigid-part conventions. Prefer repeatable location methods tied to …
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