For high-quality and frequently used packaging products such as container bags, some faults are inevitable, and these fault interruptions are one of the very important problems, and how to solve them has become our top priority. Thread breakage is a common fault encountered in the production and sewing of container bags. The quality of the stitches is not up to standard, the machine is improperly adjusted, the parts passing the thread have sharp edges, there are problems with the operating methods, and the needle is not sufficiently cooled, etc., all can lead to thread breakage. . Short-term phenomena are not allowed in container bag production.
When using a lockstitch container bag sewing machine to sew products of uneven thickness and encounter thread breakage problems, in addition to considering and analyzing the above reasons one by one, you should also pay attention to the thread breakage caused by two hook threads. It is well known in the sewing machine industry that due to the need to distribute the action cycle in the design, the transmission ratio between the upper shaft and the rotary hook of the lock stitch container bag sewing machine is 1:2. That is, the upper shaft rotates once and the hook shaft rotates twice.