1. Manual processing. During the rough edge treatment of the rubber sealing strip, manual trimming can be selected. This method has very high labor intensity and low efficiency. It is also easy to cause damage to the rubber sealing strip when trimming the rough edge, which is a method with relatively low qualification rate.
2. Mechanical trimming. Its trimming method is mainly modified by punching, round knife trimming and grinding wheel. It is more suitable for rubber seals with low accuracy requirements. However, if the accuracy requirements are relatively high, mechanical trimming may induce abnormalities.
3. Frozen trimming. This is a method of trimming with special refrigeration equipment. It uses liquid nitrogen to treat the rough edges of finished products. These rough edges will become relatively brittle at low temperature, and then use relevant frozen ions to strike the rough edges, so that the rough edges can be quickly treated. This trimming method is more efficient, and, The cost is also low. It is a mainstream method for repairing the burr of rubber sealing strip.