Observation And Analysis Of The Shrinkage Performance Of Pre-insulated Bushings

After the heat source is applied, pre insulated sleeve transitions from its original diameter to a contracted state, and its actual contraction ratio differs from the design parameters. The manufacturer has established a standard measurement procedure in the laboratory, using precision instruments to measure the pre insulated junction sleeve dimensional changes before and after heating, and plotting shrinkage curves to compare batch consistency.

The temperature field has a significant impact on the shrinkage process. Even minor differences in the heat source input method, heating time, and heating temperature gradient can cause slight dimensional deviations or shape variations in insulated joint sleeve during the shrinkage process.