Phase separation of the casting material during curing

A turbid phase-separated layer appears in the cross-section of the product after curing. This problem directly affects the mechanical properties and surface quality of the product, and in severe cases leads to scrapping of the entire batch.

(1) Process factor: Resin components of different molecular weights have poor compatibility, This factor affects the '2079851475616104453 and final quality of the product. (2) Process factor: Molecular weight growth during curing triggers phase separation, This factor affects the '2079851475616104453 and final quality of the product. (3) Formulation aspect: Insufficient curing agent or catalyst dosage, with the ratio deviating from stoichiometry. (4) Process aspect: Curing temperature or time is insufficient, and the reaction conversion rate does not meet requirements. (5) Environmental aspect: Ambient temperature too low or moisture interferes with the curing reaction.

(1) Material selection: Select resin and curing agent combinations with matching compatibility, Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (2) Process control: Control the curing temperature profile to avoid the phase separation window., Establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (3) Formulation verification: Accurately weigh the curing agent and accelerator, and verify that the ratio meets stoichiometric requirements. (4) Process adjustment: Increase the mold temperature or extend the curing time, and perform post-curing treatment if necessary. (5) Preventive measure: Establish sound process control standards and a quality inspection system, and regularly review process data for continuous optimization.

The core of the poor curing problem is that the chemical reaction conditions do not meet the requirements; it is necessary to precisely control the formulation ratio and curing process parameters.