Exhaust

With the injection of LSR, the air trapped in the mold cavity is compressed when the mold is closed, and then is discharged through the ventilation grooves during the mold filling process. If the air cannot be completely discharged, it will remain in the rubber compound (this will often cause white edges to appear on parts of the product). Ventilation grooves generally have a width of lmm-3mm and a depth of 0.004mm-0.005mm.