Unstable EPS pre-foaming ratio

Bead density after pre-foaming varies greatly between batches. 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: steam pressure or temperature fluctuations; temperature deviation directly affects the physicochemical state and reaction progress of the material. (2) Process speed aspect: uneven feeding speed of the pre-foaming machine; speed parameters affect the synchronization of material flow state and reaction progress. (3) Process time aspect: fluctuation of bead residence time in the pre-foaming machine; improper time control causes the reaction or cooling process to fail to meet process requirements, affecting the final performance of the product.

(1) Implementation measures: stabilize steam supply pressure and temperature; formulate specific operation plans based on actual production conditions and verify implementation effects. (2) Process control: control constant feeding speed; establish an online monitoring mechanism, set parameter upper and lower limits and implement alarm management. (3) Design optimization: optimize pre-foaming machine operating parameters., 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.