tài liệu ngành may work aids of sewing machines

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Work Aids of Sewing Machines

Definition

The extra machine parts which may be attached to speed

up the production and improve quality in the sewing

machine are called work aid.

Objectives

• To increase the production.

• To improve the quality of garments.

• To reduce the work- load on operator.

• To reduce the time for handling.

• To control the garments quality

1 Guide

o Guides are used for correct sewing in

predetermined position or in a determined and proper distance form edge of fabric

o It is also used for straight and curved sewing to

increase the quality and productivity.

o Edge guides are used in over edge machine.

Different types of work aids used in Sewing Machine

2 Compensating Foot

o This type of pressure foot has two sections and each section can

perform their works in different height with the help of spring

o It is suitable to sew 1-2 mm distance from the edge of fabrics

o Specially used for sewing more thickness fabrics, i.e collar

closing, seam pocket etc

3 Specialized pressure foot

o It is used for attaching piped shape trimmings like

braid or elastic

o It is suitable for sewing very close to chain or pipe.

4 Stitching Jig

o Specially used for sewing small parts of garments.

o Dye cutting parts are attached with the stitching jig

o It is made with two aluminum or plastic seat whose one end is

joined with wage.

o Two or more fabric pattern is placed properly in jig; the seats

are closed together and sewing along slot line

o Extensively used in collar and cuff

Disadvantages of Stitching Jig :

 The additional allowance is required due to not movement of the fabric during sewing in stitching jig So fabric wastage is more.

 Skilled and experienced operator is required for the controlling

of stitch length properly.

 The jig should be changed when the style is changed For this, much time and cost required.

Fig : Stitching Jig

5 Rack Guide

o It is used to attach lace, braid and elastic with garments parts

o Rack guide is used at the front of pressure foot for the

placement of lace or braiding the predetermined position from the rolls

o The lace or braid rolls are placed in rack guide.

6 Light

o Marking with chalk or pencil is required on the fabric for sewing

of parts of the garments

o The chalk spot or marking are found after washing and sewing

o In order to remove this problem special marker used which are

not visible in normal light but visible in ultraviolet ray

o The light can reflected as thin beam along needle

7 Folder

o A sewing machine attachment which folds one or more

materials into the desired configuration for sewing is called folder

o It may be placed in the middle of pressure foot or in front of

pressure foot

o It is used to increase the production and to ensure the quality of

products

8 Slack Feeder

o Lace, braids, tape or elastic are supplied in roll

forms exists tension and attached in the garments in tension condition, seam pucker may be created due

to shrinkage Slack feeder is used to avoid this problem

o In slack feeder, lace or braid is opened from rolls

with the help of motor and roller Then hangs as a loop form So tension is reduced before sewing

9 Elastication

o It helps to join elastic to the garments easily and at a

higher speed.

o Elastication can be made using folder in the front of

pressure foot.

o Computerized elastication machine is used to

increase products quality and productivity.

10 Thread Cutter

o This is a mechanical device in sewing machine used to cut

thread at a regular distance

o After completing the sewing, the thread is cut by ‘Manually

operated sewing machines’ or ‘Automatic operated sewing machines’

11 Latch Back Device

o In over edge sewing machine, the thread cutting

ends can be secured with the air flow called latch back In this method, one end can be latch back.

o In present, in latch back sewing machine, electronic

edge sensor is added and both ends of thread can be latch back

12 Compressed Air

o It is used to remove curling from fabrics, specially

knitted fabrics.

o The compressed air is flown vertically with the

fabric edge in front of edged trimmer to become straight by reducing the curling of fabric edges.

13 Stacker

o It is used to shift garments from one machine to

next machine through hanging layer.

o It reduces time, manpower and also protects the

garments from unexpected fold, dust and dirt.

Thanks to All