Shadow curing defect appears in photo-curing lamination

During ultraviolet (UV) photo-curing lamination, the resin in fiber-shielded areas is not cured. 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: Fibers (especially carbon fibers) are opaque to ultraviolet light, This factor affects the '2079851475616104453 and final quality of the product. (2) Process factor: The bottom resin cannot receive light exposure, 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 visible light curing systems or electron beam curing instead of UV curing, Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (2) Implementation measure: Use transparent fibers (glass fibers), Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Implementation measure: Laminate in stages and illuminate in stages., 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.

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.