During sewing, the sewing machine plays the role of conveying, recovering and tightening stitches in the process of forming stitches. It can be mainly divided into the following:
1.1 Cam take-up mechanism: a mechanism in which the cam drives the take-up rod to move
1.2. Connecting rod take-up mechanism: a mechanism driven by a four-bar mechanism
1.3. Slide bar thread take-up mechanism: a mechanism in which the crank slide bar mechanism drives the thread take-up mechanism to move1.4. Rotary thread take-up mechanism: a mechanism for thread take-up movement by one or two discs or other shaped components equipped with thread take-up pins
1.5. Needle bar thread take-up mechanism: it is composed of a thread passing or thread clamping device fixed on the needle bar, or a mechanism directly fixed on the thread take-up bar installed on the needle bar.
2.Feeding mechanism(industry sewing machine)
A mechanism for delivering sewing material during 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 needle and needle composite feeding mechanism; Needle and lower composite feeding mechanism; Upper, needle and lower integrated feeding mechanism; Differential feeding mechanism; Roller feeding mechanism.
3.Thread hooking mechanism(industry sewing machine)
When sewing machine is sewing, after the needle belt guides the sewing thread through the thread ring formed by the sewing material, a mechanism is used to hook the thread ring to form a stitch. Its classification mainly includes: rotary hook mechanism; Rotary hook hook mechanism; Rotary hook hook mechanism; Swing wire hooking mechanism; Swing shuttle hook mechanism; Bending needle thread hooking mechanism; Thread hook, thread hook mechanism, fork needle thread hook mechanism.4.Take up lever stroke
The distance between the two limits of the threading hole on the take-up bar in a cycle of motion
5.Needle bar stroke
The distance between the two limit positions of the needle bar movement at a certain point on the needle bar
6.Sewing speed
The number of stitches per minute of the sewing machine, unit: needle / min, maximum sewing speed: the maximum number of stitches that the sewing machine can withstand under normal sewing conditions; Working sewing speed: the maximum sewing speed at which the sewing machine can withstand continuous and safe operation under normal sewing conditions.
7.Suture thread
Thread for sewing.It is generally made of cotton thread, chemical fiber thread, metal wire, etc. The main categories are: needle and thread; Bobbin thread; Curved needle and thread; Tension line; Covering line
8.Stitch stitch
The sewing machine needle is a unit formed by one or more sewing threads that are self connected, mutually or intertwined on the sewing material each time it passes through the sewing material.
9.Presser foot presser
A member that exerts pressure on the surface of the joint material. Presser foot can be divided into flat sewing machine presser foot, overlock sewing machine presser foot and special machine presser foot according to its sewing machine performance. Presser foot is divided into ordinary presser foot and special presser foot according to its function. There are many kinds of special pressers, such as crimping presser, feeding presser, double needle presser, etc.10、Material trimming device
Cut off the sewing device during sewing. There is a device for cutting off the waste edge of sewing material in overlock sewing machine and flat sewing machine with knife. There is a device for cutting waste leather in the sewing machine for sewing leather. In the automatic sewing machine, there is a device for cutting sewing materials such as thread belt and decorative belt.
11.Punching winder
A device for opening holes in sewing material during sewing. There is a device for unlocking the eyelet in the keyhole machine. A device with flowering holes in an embroidery machine.
12.Other devices
Other devices also include: automatic thread setting device, automatic thread cutting device, automatic needle stop device, oil suction device, lubrication device, etc.