Sewing Machine Pieces To Explain

(1) seaming device

The basic form of the line hook (also known as bending needle), fork hook, water chestnut and shuttle 4 categories.

Thread hooks and shuttles all have sutures (such as sewing machine and lockstitch machine bottom line), while fork hooks and water chestnuts themselves do not have sutures (such as double crochet fork hooks and single chestnut Trimmer). They only pull the stitched coils formed on other sewing machines and attach them to another sewing machine to connect them into various stitches.

The 1. wire hook is composed of a hook head, a hook rod, a hook groove, a hook handle and a thread through hole.

The hook is used to pass through the stitches formed by straight needles or other stitching hooks, and the hook groove is used to guide the bottom line, and the hook handle is fixed on the hook rack.

Thread hooks are necessary parts for forming thread stitches, double line stitches, and seam stitches.

2. fork hook: its head is a fork, it itself does not have suture, but the other line hook on the line fork to the straight needle movement position, this is to form two line stitch stitch special machine parts.

3. water chestnut: it has no suture itself.

The sharp mouth of the water chestnut passes through the straight needle coil to expand it, so that the straight needle can penetrate through the second puncture material and form a single line chain trace.

It is a stitching device for single line trimming sewing machine and some button sewing machines.

4. shuttle: its structure is composed of shuttle shell and shuttle core.

The spindle shell is fixed on the lower axle of the machine and then rotated together; the spindle mouth is used to hook the straight needle coil; the expansion part of the curved steel skin can expand the needle ring so as to make the winding smoothly.

The shuttle core is sleeved in the shuttle shell and flexibly rotates in the groove of the shuttle shell.

The convex pin fixed on the positioning hook of the frame is embedded in the notch of the shuttle core so that the shuttles can not rotate.

The spindle is inserted with a bobbin.

The thread on the bobbin is drawn from the reed on the cover, adjusting the tension of the reed screw and adjusting the tension of the bottom line.

(two) take-up device

One

The main functions of this method are: first, to provide enough thread for forming sewing rings in the process of sewing, and the two is to tighten the trails formed in front.

2. take-up form: there are many forms of take-up, mainly including lever type, cam type and needle bar type three.

The sewing thread of industrial sewing machine is lever type take-up (connecting rod take-up).

The stitches are adjusted through the tension to pass through the holes of the crank of the take-up crank, and then pierce the pinholes through the guide hooks and the guide holes. When the lifting movements of the crank and the sewing needles move upward and downward, the suture needles needed to form the needle rings can be supplied, and the needles and bottom lines can be tightened with the help of the sewing ends.

The take-up device of flat double needle sewing machine.

The needle bar is provided with a small pressure plate and a wire drawing board. The take-up of the needle thread is achieved by the double action of the needle bar reciprocating motion and the lever type compensation take-up device, and the bottom line is completed by a single cam type take-up device.

High speed three wire package

A take-up mechanism.

The stitching principle of the needle thread is similar to that of the sewing machine. The upper and lower reciprocating motion of the needle bar drives the small pressing plate and the wiring board to move up and down, and the take-up is carried out under the cooperation of the wire drawing device, while the two left bending needles are tightened by the swing of the lever type take-up device fixed on the curved needle crank.