DNLS or Double Needle Lock Stitch Machine

Lock Stitch Machine is the most common and high demanding machine for men & women’s clothing varieties. Lock Stitch Machine uses two threads, an upper thread which comes from the sewing needle and the lower thread which is coming out from the bobbin. The two threads upper & lower threads lock together in the hole in the fabric which they pass through. 

To make a stitch, the machine lowers the threaded needle through the cloth into the bobbin area, where a rotating hook catches the upper thread at the point just after it goes through the needle. The hook mechanism carries the upper thread entirely around the bobbin case, so that it has made one wrap of the bobbin thread. The take-up arm, then pulls the excess upper thread (from the bobbin area) back to the top, forming the lock stitch. Then feed the dogs pull the material along one stitch length, and the cycle repeats.

There are two types of lock stitch machine according to the number of sewing needles and bobbins, they are:

1. SNLS or Single Needle Lock Stitch Machine.

2. DNLS or Double Needle Lock Stitch Machine.

A double Needle Lock Stitch Machine works on the same theory as the SNLS machine while using two needles and two bobbins thus resulting in two parallel rows of lock stitch.

When the stitch forms, correctly equal amounts of bobbin and needle thread are used. Upper and lower threads interlock in the center of the fabric.

The double needle lock stitch is the tightest and most secure stitch.

Box Pockets on safari jackets, light jeans and pyjamas, top stitch front collar edges of safari jackets, sew pockets on coats, sew skirt box pleats, top stitch the collars of ladies wear, top stitch the cuffs of ladies wear, suitable for sewing shirts, uniforms, jeans and women underwear, inseam of the trouser,  etc. are sewed by double needle lock stitch machine.

Advantages:

1. Lock Stitch Machines are versatile and can be used for a variety of operations.

2. Compare to all other stitch types, this class uses the least amount of thread and produces the flattest stitch.

3. It is reversible.

4. The double needle lock stitch is the tightest and most secure stitch.

5. It is the only stitch formation that can be back stitched if the ends need to be secured.

6. It is non-revealing.

7. Good hands.

8. Lies flat on the fabrics.

 Md. Farid Ahmed
IE Officer
Fakir Apparels Ltd.
BSCIC Industrial Area, Enayet Nagar,
Fatulla, Narayangonj, Bangladesh.
Mobile: 8801814220987
E-mail: farid.ieconcern@gmail.com

Garments Industry Sewing Machines | Some Essential Sewing Machines | Image & Short Introduction.

A device which is used to stitch fabric and other material with thread is called sewing machine. Most of the garments what we wear are sewn by sewing machines.

Sewing Machine is used for applying stitch in the apparel. Various types of stitching are done by the sewing machine. Depending on the stitch types, Sewing machines are classified. On the other hand sewing machines are classified according to their structure.

Types of Sewing Machines:

Each machine makes a basic running stitch the same way, with two sources of threads. The top needle takes the thread down into the fabric. It is caught and looped via the bobbin apparatus and then pulled back up. The "feed dog" (a rough edged surface underneath the fabric) moves it along and the next stitch begins. Everything else is different.

Mechanical Sewing Machines :

A mechanical sewing machine is controlled by a rotary wheel. Any adjustment like the tension or the length or width of the stitch is made by moving a dial. These machines are very basic and tend to be less expensive than the other sewing machines.

Electronic Sewing Machines :

An electronic machine differs in that there are some functions that can be accomplished by pushing a button. A machine can have a number of motors for various duties and they are run via electricity.

Computerized Sewing Machines  :

As sewing machines became more complex, more of these motors were added. A computer then coordinates all these functions. Think about a repetitive sequence of stitches being programmed, so you no longer have to replicate these movements over and over again. Nice!

1. Lock Stitch Machine/ Plain/ Regular Sewing Machine
2. Two Needle Lock Stitch Machine
3. Chain Stitch Machine
4. Double Chain Stitch Machine
5. Overlock Machine (3 threads/4 threads/ 5threads)
6. Safety Stitch Over Lock Machine
7. Flat Lock Machine
8. Feed off the arm or Flat seamer with the Cylinder Bed.
9. Buttonhole Machine
10. Button Sewing Machine
11. Bar Tack Machine
12. Blind Stitch Machine
13. Kansai Special Machine (Multi Needle or Smocking Machine)
14. Pocket Sewer M/C.

15. Zigzag flatbed sewing machine.

Lock Stitch Machine/ Plain/ Regular Sewing Machine:

Lock Stitch is the widely used for stitching fabric. According to the British standard 3870 and ISO4915:1991, lock stitch is classified as class 300.

Plain Machine used for lock stitch, Plain sewing Machine also called lock stitch machine. To Operate this machine one should have practical knowledge about the plain sewing machine.

Feature of Lock Stitch Sewing Machine: Plain Sewing Machine is used for lock stitch formation:

1. Lock stitch is formed by a single needle of a plain sewing machine.

2. The speed of a lock stitch sewing machine is up to 6000 RPM.

3. During stitch formation, the needle thread is interlaced with the bobbin thread by means of a hook.

4. Lock stitch machine can be distinguished by the winding device provided for bobbin thread.

5. The programmable plain sewing machine issued for sewing repetitive operation.

This kind of machines is used for all light, medium & heavy types of garments. Mainly, Collar and Cuff making, POcket Hemming and pocket Attach, Yoke Attach, Shoulder Attach, Sleeve Placket Make, Sleeve Attach, Bottom Hem, Main Label Attach, Top Stitches, Back Moon Join, Placket Join, Various Types of Tack, Zipper Join, Side Slid Make.