Optimizing the cavity and core accuracy of preform molds is the core link to improve the consistency of preform dimensions and ensure the quality of subsequent blowing (such as uniform wall thickness and sealing standards). It is necessary to establish a full-process control system from the four dimensions of design specifications, processing technology, accuracy testing, and post-maintenance.

To optimize the accuracy of preform mold cavities and cores, it is necessary to follow the whole process logic of "design reservation compensation, processing control error, detection and verification accuracy, and maintenance and maintenance accuracy":

The design stage focuses on solving "shrinkage compensation" and "structural rationality" to avoid congenital defects.

The processing stage uses "high-precision equipment + optimized process" to control errors to a minimum range;

The testing stage passes "full-dimensional testing" to ensure that the accuracy meets the standard;

The maintenance phase extends the life of precision through "regular monitoring and repair".

The ultimate goal is to control the dimensional error between the cavity and the core within ±0.005mm, ensuring the consistency of preform dimensions (deviation ≤± 0.05mm), and providing a stable "base body" for the subsequent blowing process.