Now the thick material sewing machine is more and more meeting the needs of people's life. The thick material sewing machine has been applied to all walks of life. The bagging sewing machine in the thick material sewing machine is a typical one to meet the needs of logistics transportation and storage, and to meet the needs of industrial production. The container bag sewn by the container bag sewing machine is durable and has strong bearing capacity. Of course, high-quality products can not be separated from excellent equipment. The structural design of the bagging sewing machine determines its good quality.

The bagging sewing machine has compact structure and reasonable layout. The space on the automatic production line of flexible container bags is limited, leaving little space for the assembly of the automatic bobbin changing mechanism, which requires the device to have a reasonable layout and compact structure relative to the production line.

In order to prevent the automatic thread changing device from interfering with the operation of the production equipment, it is required that the bagging sewing machine device must be able to be stored in the designated position below the sewing machine mounting base in the idle time. The storage and automatic feeding of the standby shuttle can be realized. The sewing machine on the automatic production equipment for container bags consumes a lot of bobbin thread during operation. Therefore, the automatic bobbin thread changing device must be able to store enough spare bobbins and automatically feed and replace the spare bobbins. The time for replacing the bobbin thread shall not exceed 20s. According to the design index and work cycle of the automatic production equipment for container bags, it is required that the time for replacing the bottom line shall not exceed 20s, and the time for replacing the bottom line shall be reduced as much as possible.