Insufficient resin impregnation

Internal fiber bundles of reinforcement materials (glass fiber cloth, carbon fiber cloth, etc.) are not fully wetted by resin. This problem is relatively common in lamination molding production and requires comprehensive analysis and solution from multiple aspects of materials, processes, and equipment.

(1) Material state aspect: resin viscosity too high to penetrate into fiber bundles; abnormal viscosity affects the flow filling and impregnation ability of the material. (2) Process time aspect: impregnation time too short; improper time control causes the reaction or cooling process to fail to meet process requirements, affecting the final performance of the product. (3) Material pretreatment aspect: poor fiber surface treatment reducing wettability; moisture vaporizes at high temperature to produce gas or participates in side reactions, causing internal defects in the product.

(1) Formulation optimization: appropriately reduce resin viscosity (heating or adding diluent); determine the optimal addition amount through small-batch tests, and verify the impact on the comprehensive performance of the product. (2) Process optimization: extend impregnation time or use vacuum-assisted impregnation; determine a reasonable time based on product wall thickness and material characteristics, balancing production efficiency and quality. (3) Material selection: use sizing-treated fiber reinforcement materials., establish material selection evaluation standards and determine the optimal solution through comparative tests. (4) Preventive measures: establish a sound process control standard and quality inspection system, and regularly review process data for continuous optimization.

This problem requires comprehensive analysis from multiple dimensions of materials, processes, equipment, and operation, and should be solved by systematically optimizing process parameters and the quality control system.