What is the working principle of sewing machine?

Sewing machine was a necessity for families decades ago, and it was the treasure of every housewife. Now many families have such machines. Moreover, the invention of sewing machine greatly promoted the efficiency of the factory at that time, and the invention of sewing machine enabled the factory to produce in large quantities. There are many models of sewing machines, which are not only suitable for daily use in families, but also high-end electronic sewing machines. There are so many kinds of sewing machines, do you know what their principle is? Then please read the following to learn more about the principle of sewing machine.

Coil splicing system

Coil sewing system is the core of sewing machine working principle. Although the automatic sewing of sewing machine is very simple, it needs the cooperation of gears, pulleys and motors to ensure the work, and its design principle is still very fine. And its sewing method is very different from manual sewing. Different from the traditional manual sewing, the sewing machine works through clothes, and the eye of the needle is not at the end of the needle, but behind the needle tip. The needle is fixed on the needle bar, and the gear and cam move up and down to pull the needle bar to work. Moreover, it pulls out a small coil, and the fixing device under the clothes will use this coil to wind another thread, thus achieving the effect of series connection. This allows continuous sewing, which is very labor-saving.

Principle of stitch formation

First, send cloth.

The needle descends from top to bottom, and at the same time, the cloth is conveyed directly below the needle. When the needle approaches the cloth, the cloth conveying stops and the program is completed.

Second, the needle leads.

After the needle thread continues to descend, when the needle thread passes through the cloth and descends to the lowest position, the thread is pulled down by the pinhole and squeezed by the needle bar and sewing material, thus reaching the state of being close to the needle bar and directly above the pinhole.

Thirdly, the formation of conductor loop.

When the needle is in the lowest position, the thread works under the joint action of sewing material, needle, needle groove and shuttle bed cover to form a phase loop. reach

Fourth, swing the hook line

Through the rotation of the swing shuttle tip, the wire loop is hooked, and the traction wire surrounds the lower part of the bobbin sleeve.

Fifth, the top line leads the bottom line.

When the swing shuttle hooks the thread and rotates under the bobbin, the thread take-up lever rises to take back the upper thread instead of the thread take-up, so that the thread loop shrinks and moves to cover the bottom thread.

Sixth, tighten the suture stage.

With the cooperation of various functions, the machine tightens the sewing seam and finally completes one stitch and one thread.

Doing so can make the sewing thread intersect in the middle of the sewing material. The cross section looks like two locks locked together, so it is also called "double-line interlocking seam". Very simple and convenient.

After listening to the introduction of the principle of sewing machine, do you also find that the principle of small sewing machine is not simple? Some people call the sewing machine a great and ingenious invention. Its appearance not only brings convenience to human life, but also improves people's living standards and quality. In the 2 1 century, sewing machines are indispensable in our daily life. The continuous development of society has also promoted the continuous progress of sewing machines. I believe that sewing machines will play a greater role in the future!