The main difference is the dimensional accuracy. Precision MCCB molds require extremely tight tolerances and key dimensions often cannot have any draft angle (slope), whereas ordinary molds allow for standard slopes and larger tolerance zones.

Most customer-provided 3D models represent the limit dimensions of the final product. Designing a mold directly from these dimensions without adjusting for material shrinkage, tolerance zones, and specific part features will result in a non-functional, scrapped mold.

For key functional areas like gear installation columns, slopes are strictly prohibited to ensure proper mechanical movement. However, a micro-slope and optimized tolerance distribution are strategically applied to non-critical areas to facilitate part ejection.

Incorrect tolerance design leads to assembly failure of the MCCB components, unstable electrical contact, or structural weakness, which ultimately ruins the performance of the circuit breaker.

The most critical step is the transition from the customer's design model to a manufacturing-ready mold model. This involves recalculating all tolerances, adding precise shrinkage factors, and modifying tool paths to ensure high-precision physical replication.

High-precision molds ensure consistent component dimensions, reducing mechanical wear and internal stress during circuit breaker operations. This leads to reliable arc extinction, stable electrical parameters, and a significantly longer product service life.