Gel shock appears in casting material under low-temperature environment

The product suddenly cracks during low-temperature storage after casting. This problem is relatively common in casting molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Temperature parameter aspect: The glass transition temperature (Tg) of the material is higher than the storage temperature, causing embrittlement, which may cause thermal degradation of the material or runaway reaction rate, destroying the internal structure of the product. (2) Stress distribution aspect: Internal stress is concentrated and released at low temperature, Internal stress concentration causes the product to crack or deform during subsequent use. (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) Material selection: Select resin systems with Tg below the minimum service temperature, Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (2) Post-treatment: Fully anneal the product to eliminate internal stress., Develop a reasonable post-treatment temperature profile to eliminate internal stress and stabilize product dimensions. (3) Process optimization: Determine the optimal process parameter window through systematic tests and establish standardized operating procedures. (4) Quality control: Strengthen process monitoring and product inspection, Establish a defect early-warning and traceability mechanism. (5) 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.