Working Principle Of Sewing Machine

The working principle of the sewing machine is to use the needle and thread to interweave with each other to form a continuous stitch on the fabric, thereby realizing the function of sewing. The principle of the sewing machine can be divided into the following aspects to introduce.

Needle and thread transmission principle:

The core components of the sewing machine are the needle and thread. The needle forms a stitch on the fabric by moving up and down and interweaving with the thread. The needle and thread transmission principle is the basis for the sewing machine to realize the stitching function. When the sewing machine is started, the motor drives the belt to drive the spindle to rotate, and the spindle drives the crank shaft on the needle bar to rotate. The crank connecting rod on the crank shaft transmits the reciprocating motion of the up and down movement to the needle bar, so that the needle pierces up and down on the fabric.

Stitch formation principle:

The formation of stitches is the key to the sewing machine, which determines the sewing effect of the sewing machine. The formation of stitches mainly depends on the interaction between the needle and the thread. When the needle descends, it passes through the fabric, and the needle eye leaves a ring-shaped hole on the fabric, while passing the thread through the needle eye. When the needle starts to rise, the thread is tightened, thus forming a stitch. The formation of stitches requires the coordinated action of needle and thread. The needle must accurately pass through the fabric and pass the thread through the eye of the needle. The thread must have appropriate tension to ensure the firmness of the stitches.

Principle of the cloth feeding mechanism:

The cloth feeding mechanism is an important component on the sewing machine. It is responsible for pushing the fabric under the needle,

so that the needle can pass through the fabric for stitching. The principle of the cloth feeding mechanism is to make the fabric move smoothly on the sewing machine through the action of gears and transmission rods. When the sewing machine is started, the gear drives the cloth feeding claw to move, and the cloth feeding claw pushes the fabric forward through the transmission rod. The design of the cloth feeding mechanism should take into account the smooth movement of the fabric and the accuracy of the stitches.

Principle of tension adjustment:

Tension adjustment is an important function on the sewing machine. It can adjust the tension of the thread to adapt to different fabrics and stitching effects. There are usually two adjustment devices on the sewing machine: upper thread tension and lower thread tension. The adjustment of the upper thread tension is to change the tension of the thread through the tension adjustment device, thereby affecting the tightness of the stitches. The adjustment of the lower thread tension is to change the tension of the thread through the tension adjustment device, thereby affecting the tightness of the stitches. The adjustment of the lower thread tension is to change the thread tension through the tension adjustment device, thereby affecting the firmness of the stitch. The principle of tension adjustment is to change the tension of the thread by changing the stretching degree of the tension spring in the tension adjustment device.

The working principle of the sewing machine mainly includes the needle and thread transmission principle, the stitch formation principle, the cloth feeding mechanism principle and the tension adjustment principle. They work together to realize the sewing function of the sewing machine. The principle of the sewing machine is based on the principle of physics and has been engineered and manufactured to meet people's needs for sewing clothes. The principle and structure of the sewing machine are constantly being improved and innovated to adapt to different sewing needs and technological developments.

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