What is the principle of Seaming Machine?
Like a car, the basic principles of most sewing machines are the same. The core of the car is the internal combustion engine, and the core of the sewing machine is the coil stitching system. The stitching method of the coil differs greatly from ordinary hand sewing. In the simplest hand stitching, the sewer attaches a thread to the small eye at the end of the needle, then passes the needle through the two fabrics completely, from one side to the other, and then back to the original side. In this way, the needle drives the wires in and out of the fabric and stitches them together.
Although this is very simple for handwork, it is extremely difficult to pull with a machine. The machine needs to release the needle on one side of the fabric and then grab it again on the other side. Then, it needs to pull all the loose lines out of the fabric, adjust the direction of the needle, and then repeat all the steps in the opposite direction. This process is too complicated for a simple machine, and it is not practical, and even for manual use, it is only useful when using a shorter line.
The most important components of the locking device are the shuttle hook and spool assembly. The spool is a roll of wire placed under the fabric. It is located in the center of the shuttle, which is rotated by the motor and synchronized with the movement of the needle. As with chain stitching, the needle pulls a coil through the fabric, and as the feed dog moves the fabric forward, it rises again and then inserts another coil. However, this stitching mechanism does not connect the different coils together, but rather connects them to another length of wire that is loosened from the spool. When the needle puts the thread into the coil, the rotating shuttle catches the coil with the crochet. As the shuttle rotates, it pulls the coil around the wire from the spool. This makes the stitching very strong.