U型卡扣一般与U型卡双卡封口机共同使用，可用于火腿肠两端、密封胶、炸药封口包装等，其功能就是将规定型号的U型卡扣紧固在封口工序的两端。

U type buckle is commonly used with U card and double card sealer. It can be used in both ends of ham sausage, sealing glue, explosive sealing and packaging. Its function is to fix the U fastener at the ends of sealing process.

U型卡扣箍紧后密封性足够，能够保证需封口工序介质的储存性能。另外，U型卡扣还可以与德国POLY打卡机配套，各项技术指标都超过同等进口产品水平，能够满足各种打卡机使用，型号规格齐全。

The U type buckle is tight enough to ensure the storage performance of the sealing medium. In addition, the U type buckle can also be matched with the German POLY punch card machine, and all the technical indexes exceed the level of the imported products. It can meet the needs of various punch machines, and the specifications are complete.