Local hot spot runaway appears in microwave sintering of PTFE

Local temperature of products far exceeds the set value during microwave-assisted sintering. This problem is relatively common in sintering molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Process factor: The microwave field is unevenly distributed in the sintering furnace, This factor affects the '2079851475616104453 and final quality of the product. (2) Process factor: The product shape and dielectric constant cause energy focusing to form hot spots, This factor affects the '2079851475616104453 and final quality of the product. (3) Material aspect: Fluctuations in raw material performance indicators or insufficient pretreatment affect molding quality. (4) Process aspect: Control deviation of key process parameters causes the '2079851475616104453 to deviate from optimal conditions. (5) Equipment aspect: Equipment precision and maintenance status affect the stable execution of process parameters.

(1) Process operation: Design a multi-mode stirrer for the microwave sintering furnace to make the microwave field uniform, Optimize stirring parameters to ensure uniform dispersion of all components, avoiding local concentration differences. (2) Implementation measure: Rotate or move the product to avoid hot spots, Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Material selection: Use hybrid heating (microwave + resistance) to balance the temperature., Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (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.