Hollow phenomenon (no foam in product core)

A cavity exists in the center of the foamed product. This problem is relatively common in foam molding production and requires comprehensive analysis and solution from multiple aspects of materials, processes, and equipment.

(1) Temperature parameter aspect: center temperature too high, gas merging and escaping after expansion, which may trigger thermal degradation of the material or runaway reaction rate, damaging the internal structure of the product. (2) Process factor: insufficient mold filling amount causing inadequate foaming in the center; 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 deviations of key process parameters cause the '2079851475616104453 to deviate from optimal conditions. (5) Equipment aspect: equipment precision and maintenance status affect the stable execution of process parameters.

(1) Formulation optimization: increase mold filling amount; determine the optimal addition amount through small-batch tests, and verify the impact on the comprehensive performance of the product. (2) Parameter adjustment: adjust foaming formulation to lower center heat release temperature, noting that after cooling it is still necessary to ensure the material fully reacts or melts; adjust step by step and observe the effect. (3) Design optimization: optimize mold cooling design., combine process simulation analysis or mold trial verification to continuously iterate and improve the design plan. (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.