WORK PRINCIPLE OF A CHAIN STITCH MACHINE | CHAIN STITCH MACHINE

A chain stitch machine is a type of sewing machine that creates a looped stitch using a single thread. Here's how the working principle of a chain stitch machine generally works:

 

1.      Thread supply: The machine is equipped with a spool holder that holds the upper thread. The thread is supplied from a spool placed on the spool holder.

2.      Thread tension: The upper thread passes through a tension assembly that controls the tension of the thread. The correct tension is necessary to ensure that the stitches are uniform and not too loose or too tight.

3.      Needle movement: The needle is attached to a mechanism that moves it up and down through the fabric. The needle is driven by a motor or hand-cranked mechanism that rotates the needle bar.

4.      Fabric feed: The fabric is fed through the machine by a set of feed dogs that grip the fabric and move it forward as the needle descends. The speed and direction of the feed dogs can be adjusted to control the stitching.

5.      Loop formation: As the needle descends through the fabric, it creates a loop of thread that is then picked up by a looper mechanism that forms the loop into a chain stitch. The looper mechanism is located beneath the needle and moves in synchronization with the needle.

6.      Stitch formation: As the needle continues to move up and down, the looper mechanism forms a series of chain stitches that are linked together. The stitch is formed by interlocking the loops of thread, creating a strong and durable stitch.

7.      Stitch length: The length of the stitch is determined by the speed and direction of the feed dogs, as well as the speed of the needle and looper mechanism. The stitch length can be adjusted to create longer or shorter stitches, depending on the requirements of the sewing project.

In summary, a chain stitch machine works by using a needle to create a loop of thread, which is then picked up by a looper mechanism and formed into a chain stitch. The machine uses a single thread and interlocks the loops of thread to create a strong and durable stitch. By adjusting the thread tension, stitch length, and fabric feed, the machine can create a variety of different stitch patterns for different types of sewing projects.