Insufficient Degassing

Tiny bubbles still remain in the casting liquid after vacuum degassing. This problem is relatively common in casting molding production and requires comprehensive analysis and solution from multiple aspects of materials, processes, and equipment.

(1) In terms of process time: the degassing vacuum degree is too low or the time is too short, improper time control causes the reaction or cooling process to fail to meet process requirements, affecting the final performance of the product. (2) In terms of material state: the casting liquid viscosity is too high and bubbles have difficulty rising, abnormal viscosity affects the material's flow filling and impregnation capabilities. (3) Process factors: the material layer in the container is too thick and bubbles at the bottom cannot escape, this factor affects the product's '2079851475616104453 and final quality.

(1) Process optimization: increase the degassing vacuum degree and extend the degassing time, determine a reasonable time based on product wall thickness and material characteristics, balancing production efficiency and quality. (2) Formula adjustment: appropriately increase the material temperature to reduce viscosity, adjust gradually and verify the effect, ensuring that other performance indicators of the product are not affected. (3) Process strengthening: use a thin-film degasser to increase the specific surface area, increase the vacuum degree and ensure sufficient treatment time, and proceed to the next process only after confirming that bubbles are completely eliminated. (4) Process strengthening: degas in batches in thin layers., increase the vacuum degree and ensure sufficient treatment time, and proceed to the next process only after confirming that bubbles are completely eliminated. (5) Preventive measures: establish a complete process control standard and quality inspection system, and regularly review process data for continuous optimization.

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