Manufacture method for slow-rebound polyether polyurethane sponge

The invention relates to a manufacture method for polyurethane sponge, in particular to a manufacture method for slow-rebound polyether polyurethane sponge, which includes the steps: respectively dosing, respectively stirring, respectively feeding, foaming and cooling, and includes the detailed steps: stirring first polyhydric alcohol and second polyhydric alcohol in a first stirrer with uniform mixing so that first mixed liquor is obtained; stirring MDI (diphenylmethane diisocyanate), foaming agent, catalyst, surface active agent, flame retardant and 0.2-0.8 part of silicon rubber toughening agent in a second stirrer with uniform mixing to obtain second mixed liquor; delivering the first mixed liquor into a first feeding pipe, delivering second mixed liquor into a second feeding pipe, foaming in a foaming mould for 1-8min at 40-50 DEG C, holding for 1-5h at 25-40 DEG C; and cooling and dicing. The method is simple, convenient and high in production efficiency, and can manufacture the slow-rebound polyether p