Defining Dimensional and Cavity Checks for Your Mould

Dimensional inspection is most useful when the buyer and mould maker agree what is being checked and against which reference. HAWEN's quality control topics include mould dimensions and forming details. The relevant checks and acceptance requirements should be established for the product drawing and tooling scope.

Identify the Features That Matter to the Product

Review the product outline, openings, web or wall details, profiles and connecting features where applicable. Mark dimensions that are important to the finished unit's use or appearance. Then distinguish the product requirements from the corresponding mould dimensions, since they describe different items and should not be confused in a measurement record.

Ask how cavity locations and repeated features will be identified. A drawing reference or position label makes a result easier to interpret than an unlabelled photograph of a measuring tool. Any required tolerances, measurement methods and inspection records should be agreed rather than inferred from a general reference to precision.

Dimensional Review Checklist

• Use the current approved drawing with units and revision visible.
• Identify critical dimensions and the cavities or features to be checked.
• Agree measurement references and any required record format.
• Define how questions or differences will be reviewed before acceptance.

Keep the resulting records connected to the relevant mould and drawing revision. If finished product measurements are also required, discuss those as a separate part of the acceptance scope. A clear distinction between tooling measurements and product observations helps both sides understand what the inspection evidence actually demonstrates.