Our company developed an IP67 waterproof grade leakage protection plug for the company. Previous products were not enough to meet customer needs, and mechanical equipment could not meet production needs. Our design team developed and tested, upgraded corresponding industrial equipment, and used ultrasonic welding technology to develop an IP67 waterproof grade leakage protection plug. The production capacity and efficiency were greatly improved, which solved the customer's demand for product development and upgrading and was recognized by customers.