1. Take-up mechanism
When sewing, the sewing machine acts as a mechanism for conveying, recovering the needle thread and tightening the stitch in the process of forming the stitch. Mainly can be divided into the following:
1. Cam thread take-up mechanism: a mechanism that drives the thread take-up lever to move by a cam
2. Connecting rod thread take-up mechanism: a mechanism that drives the movement of the thread take-up mechanism by a four-bar linkage mechanism
3. Slide bar thread take-up mechanism: a mechanism that drives the movement of the thread take-up mechanism by the crank-slide bar mechanism
4. Rotary thread take-up mechanism: a mechanism that uses one or two discs or other shaped components equipped with thread-take-up pins to perform a thread-take-up motion with a rotary motion
5. Needle bar thread take-up mechanism: a mechanism that fixes the thread-passing or thread-clamping device on the needle bar, or directly fixes the thread take-up lever installed on the needle bar.
2. Feeding mechanism feeding mechanism
The sewing machine performs the mechanism of delivering the sewing material when sewing. It is classified as: forward feeding mechanism; backward feeding mechanism; transverse feeding mechanism; lower feeding mechanism; upper feeding mechanism; needle feeding mechanism; upper and lower composite feeding mechanism; upper and needle composite feeding mechanism; needle and lower composite feeding mechanism ; Upper, needle, lower integrated feeding mechanism; Differential feeding mechanism; Roller feeding mechanism.
3. thread hooking mechanism
When the sewing machine is sewing, after the thread loop formed by the needle and the leader thread is passed through the sewing material, a mechanism that hooks the thread loop to form a stitch. Its classification mainly includes: rotary hooking mechanism; rotary hook hooking mechanism; rotary hook hooking mechanism; swing hooking mechanism; swing hooking mechanism; looper hooking mechanism; hook hooking mechanism mechanism.
4. Take-up lever stroke
The distance between the two extremes of the threading hole on the thread take-up in one cycle of motion
5. Needle bar stroke
The distance between a point on the needle bar and the two extreme positions of the needle bar movement
6. sewing speed
The number of needle punches per minute of the sewing machine, the unit is needle/min, the maximum sewing speed: the maximum number of needle punches that the sewing machine can withstand under normal sewing conditions; the working sewing speed: the sewing machine can withstand continuous safe operation under normal sewing conditions maximum sewing speed.
7. Suture thread
Thread for sewing. Generally made of cotton thread, chemical fiber thread, metal wire and so on. The main categories are: needle thread; shuttle thread; looper thread; stretch thread; covering thread
8. Stitch stich
The sewing machine needle is a unit formed by one or more stitches, self-connected, mutually or intertwined on the sewing material each time the material is sewn.
9. Presser foot presser
A member that exerts pressure on the surface of the seam material. Presser foot can be divided into lockstitch machine presser foot, overlock presser foot, and special machine presser foot according to its sewing machine performance. The presser foot is divided into ordinary presser foot and special presser foot according to its function. There are many types of special presser feet, such as hemming presser feet, feed presser feet, double-needle presser feet, etc.
10. material trimming device
During the sewing process, cut off the sewing material device. In the overlock sewing machine and the lock sewing machine with a knife, there is a device for cutting the waste edge of the sewing material. In the sewing machine for sewing leather, there is a device for cutting off the waste leather. In automatic sewing machines, there are devices for cutting thread tapes, decorative tapes and other sewing materials.
11. Punching winder
A device that makes holes in the sewing material during the sewing process. There is a device for opening the keyhole hole in the buttonhole machine. There is a device for opening pattern holes in an embroidery machine.
12. Other devices
Other devices include: automatic thread dialing device, automatic thread trimming device, automatic needle stop position device, oil suction device, lubricating device, etc.
