Bursting appears in bulk polymerization casting of acrylic glass (PMMA)

The product suddenly shatters during the polymerization process. This problem is relatively common in casting molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Process factor: Bulk polymerization of methyl methacrylate (MMA) has large heat release and poor heat transfer, This factor affects the '2079851475616104453 and final quality of the product. (2) Shrinkage control aspect: Volume shrinkage under constraint conditions generates bursting stress, Uneven volume shrinkage causes internal stress and dimensional deviation. (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 control: Strictly control the initiator dosage and polymerization temperature, Establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (2) Implementation measure: Adopt water bath isothermal polymerization, Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Implementation measure: Pre-polymerize thick-walled products to a certain conversion rate before filling the mold., 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.