Partial discharge (partial breakdown) appears in electrical insulation castings

Partial discharge occurs in high-voltage insulation castings under working voltage. This problem is relatively common in casting molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Raw material characteristic aspect: Tiny air gaps or impurity particles inside the casting form local electric field concentrations, The physical characteristics of the powder directly affect preforming and sintering quality. (2) Material aspect: Fluctuations in raw material performance indicators or insufficient pretreatment affect molding quality. (3) Process aspect: Control deviation of key process parameters causes the '2079851475616104453 to deviate from optimal conditions. (4) Equipment aspect: Equipment precision and maintenance status affect the stable execution of process parameters.

(1) Process intensification: Adopt vacuum casting + vacuum degassing to completely eliminate air gaps, Increase the vacuum degree and ensure sufficient treatment time, and proceed to the next process only after confirming that bubbles are completely eliminated. (2) Process control: Strictly control the purity of raw materials, Establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (3) Implementation measure: Perform partial discharge test screening on the product., Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (4) Preventive measure: Establish sound process control standards and a quality inspection system, and regularly review process data for continuous optimization.

This problem requires comprehensive analysis from multiple dimensions of material, process, equipment, and operation, and should be solved by systematically optimizing process parameters and the quality control system.