ALT 🔶 Pressure is a structural design input. Vacuum pressure, external pressure, and thermal loads can deform the mould if stiffness is not controlled. Flat areas, sharp transitions, sealing zones, and vacuum ports are critical regions where local deformation can cause imprinting, tolerance loss, or geometric distortion. 🔶 Durability defines the ability of the mould to maintain geometry, surface quality, and function over time. It depends on the expected number of parts, process conditions, cyclic loading, thermal cycles, chemical exposure, handling, and assembly operations. Underdesign leads to premature failure, while overdesign increases weight, cost, and manufacturing complexity. 🔶 Surface finish is functional, not only aesthetic. The mould surface transfers directly to the part, so roughness, gloss, scratches, waviness, or print-through can be reproduced in production. It must be defined by function, visibility, and the good side, and controlled through preparation, sanding, poli

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ALT 🔶 The first is the reference surface, often called the good surface. This is the side of the part where surface quality, dimensional accuracy, and geometric control are most critical. Since it is generated directly against the mould, it defines where the finish, tolerances, and inspection effort must be concentrated. 🔶 From there, demoulding analysis becomes essential. Its purpose is to verify that the part can be extracted without damaging the mould, the laminate, or the controlled surface. This analysis checks the extraction direction, undercuts, negative draft angles, and local features that may prevent safe release. If it is done too late, the result may be redesign, delays, extra cost, and unsafe extraction methods. 🔶 When the geometry cannot be released from a single-piece mould, mould divisions are required. They make complex shapes manufacturable, but each division introduces an interface. That interface affects parting lines, assembly, alignment, repeatability, airtightne