Stitch forming principle of thick thread zigzag sewing machine

The thick thread zigzag sewing machine is applicable to all kinds of stitching and thick thread decorative sewing of leather sofas, fabric sofas, leather car seat covers, automobile fabric seat covers, soft furniture, tents, etc.

The thread hook mechanism of the thick thread zigzag sewing machine is an important part of thick thread sewing. Its main task is to hook the thread loop thrown by the needle, make it bypass the rotary hook frame with bobbin thread wrapped, and make the bottom and surface stitches lock each other. Its motion principle is that the wire is driven by a bevel gear. In the thread hooking mechanism, the rotary hook and shuttle are important components, which are the executive parts to realize the thread hooking function and the important principles in the process of forming lock stitch.

According to the number of stitches and the principle of forming stitches on the sewing material, sewing machine stitches can be divided into lock stitch, chain stitch, overlock chain stitch, cover chain stitch (tight stitch), and other types. there are three ways to get lock stitch, namely shuttle, swing shuttle, and rotary shuttle. From the perspective of dynamics, the hook and thread mechanism of the rotary hook is ideal. It has no inertial load with variable speed. Therefore, all its movements are stable under high-speed rotation.