Filtering effect appears at the injection port of RTM/VARTM

During vacuum-assisted resin transfer molding (VARTM), fibers accumulate near the injection port and excessively filter out the resin. This problem is relatively common in lamination molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Pressure parameter aspect: Excessive injection pressure causes fibers to be compacted at the inlet, forming a dense filter layer, which may cause internal material damage or excessive resin flow, affecting the structural uniformity of the product. (2) Process factor: blocking further resin flow, This factor affects the '2079851475616104453 and final quality of the product. (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) Parameter adjustment: Reduce the injection pressure or speed, Appropriately reduce the pressure on the premise of ensuring product compactness, avoiding defects caused by insufficient pressure. (2) Formulation optimization: Add flow-guiding media at the injection port to disperse the resin flow pressure., Determine the optimal addition amount through small-batch tests, and verify the effect on the overall performance of the product. (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.