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Home Apparel Engineering Bar tack Sewing Machine II Study on bar tack sewing machine with thread path diagram and sample production.

Bar tack Sewing Machine II Study on bar tack sewing machine with thread path diagram and sample production.

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Md Sohanur Rahman Sobuj

Md Sohanur Rahman Sobuj

Co-founder , Admin & Author at Textile Study Center
Student of Bangladesh University of Textiles (BUTEX) Department: Apparel Engineering
Md Sohanur Rahman Sobuj
Md Sohanur Rahman Sobuj
Md Sohanur Rahman Sobuj

Latest posts by Md Sohanur Rahman Sobuj (see all)

Experiment Name: Study on bar tack sewing machine with thread path diagram and sample production.

Introduction:

Industrial bar tack machine is actually a lockstitch machine group. By this machine, a very high density lockstitch is produced in very short length for increase the strength of that particular place. These machines are used for sewing both woven and knitted garments. For light thickness fabrics, needle size should be lower and heavy thickness fabric, height needle size should be used.

Objectives:

To know about bar tacking machine.

 To know about different parts of the machine.

 To know about the thread path of the machine.

 To know about the specification of the machine.

 To know about the adjustment points of the machine.

 To know about working principle of the machine.



Bar Tack Sewing Machine

Specification

Machine Name

Bar tack sewing machine

Model

LK 1850

Brand Name

Juki

Group

Lock Stitch

Origin

Japan

Needle Name

DP x 5

Needle Size

9, 11, 14, 16, 18, 20 & 21

Needle No

1

Thread No

2/1

Looper No

X

Bobbin Case No

1

Intralooping

X

Interlooping

X

SPM

3000-3600

Seam Class

Super-imposed

Stitch Class

300

Stitch Length

1-1.5 cm

TPI or SPI

Per bar tack thread uses 7-8 inch

End use of function

All kinds of plain sewing


Different Parts of Bar Tack Sewing Machine :

1

Thread stand and Cone case

2

Thread guide

3

Spring tensioner

4

Thread take-up lever regulator

5

Needle

6

Needle bar

7

Presser foot bar case

8

Presser foot

9

Needle past box

10

Throat plate

11

Feed dog

12

Stitch density regulator

13

Back stitch lever

14

Presser foot lever

15

Bobbin & bobbin case

16

Motor

Bar Track sewing Machine

 
A=Cone Package        F=Tensioner                               K=Guide
B=Thread                      G=Tensioner                              L=Guide
C=Guitd                         H=Guide                                        M=Needle
D=Guide                        I=Guide
E=Guide                         J=Thread take up lever
Function of different parts:
  • Cone: Helps for containing the supply of needle thread.
  • Cone Holder: Supports the cone.

  • Cone Stand: Helps to support the cone and holder.
  • Stitch Density controller: It controls the no of stitch per inch. Before starting the machine, stitch per inch is determined rotating the knob and fixing it at the desired position.
  • Motor: Motor rpm controls the speed of the machine. The rpm is controlled by the tightening or losing the belt over machine and motor pulley.
  • Needle: Needle under goes accurate setting to ensure proper sewing. The needle is attached by means of screw which needs to be tightened enough to produce easy sewing.
  • Needle Bar: Needle bar holds the needle.
  • Thread take up lever: It controls the movement of the yarn during sewing.
  • Presser foot: For using it, proper setting is important which ensured by proper attachment with the motor through the machine pulley.
  • Feed dog: It is often found that due to random working, the feed dog is subjected to be loose which many cause accident also. Thus it should be set properly with screw.
  • Guide and tensioner: Use to pass the thread properly without tensionless proper sewing.

Stitch Description:

Stitch class: 300, Group: lock stitch type. In this machine there is two source of thread one is needle thread, another is bobbin thread. By interlacement of this two thread stitch is formed. Bobbin thread is stored in a bobbin which is placed under the needle bed of the machine. The needle of this machine moves a little front and back to form the stitch in a limited length of stitch in a heavy dense stitch to increase the seam strength on that point.

Working principle of Bar Tack Sewing Machine :

At first, this machine produces tack stitches in a small length (1-2 cm) and then sews covering stitches over and at right angles to the first stitches. The variables are the number of tacking stitches and the number of covering stitches. Typical uses are closing the ends of buttonholes, reinforcing the ends of pocket openings and the bottoms of flies and sewing on belt loops. The adjustment points of this machine are needle, pressure feed, stitch length, stitch density.



Uses of Bar Tracking Machine in Apparel Sewing:

 Bar Tracking Sewing Machine is used to secure pocket corners, belt loops, the open end of a button hole, zipper flies.

 Bar Tracking Sewing Machine is also used for small decorative tracks and shapes.

Conclusion:

Bar tack machine is one of the most important and most expensive machine of garments production. By this experiment, we have learnt about different parts and their function in garments of the bar tack machine. It’s different function in garments processing which would help us in our practical job life.


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Md Sohanur Rahman Sobuj

Md Sohanur Rahman Sobuj

Co-founder , Admin & Author at Textile Study Center
Student of Bangladesh University of Textiles (BUTEX) Department: Apparel Engineering
Md Sohanur Rahman Sobuj
Md Sohanur Rahman Sobuj
Md Sohanur Rahman Sobuj

Latest posts by Md Sohanur Rahman Sobuj (see all)

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