Lecture 6Lecture 6

Sewing Machine Beds …Sewing Machine Beds …

Sewing Machine Beds …Sewing Machine Beds …

There are different type of sewing There are different type of sewing machine beds.machine beds.

The purpose of designing different The purpose of designing different type of beds is just to allow the easy type of beds is just to allow the easy movement of the components being movement of the components being sewn.sewn.

An inappropriate bed makes the An inappropriate bed makes the operator’s work more tedious and operator’s work more tedious and time consuming. time consuming.

Types of sewing machine beds Types of sewing machine beds ….….

There are four basic types of sewing There are four basic types of sewing machine bedsmachine beds Flat bedFlat bed Cylinder bedCylinder bed Feed of the arm bedFeed of the arm bed Post bedPost bed

Machine tables….Machine tables….

There may be a difference with the There may be a difference with the mounting of machine with machine table.mounting of machine with machine table.

This is commonly used in over edging This is commonly used in over edging machines.machines.

The purpose is just to provide the operator The purpose is just to provide the operator correct and proper work area.correct and proper work area.

There are two possibilitiesThere are two possibilities Raised MountingRaised Mounting Submerged MountingSubmerged Mounting

Sewing Machine Beds …Sewing Machine Beds …

Flat BedFlat Bed Flat bed is the most commonly used Flat bed is the most commonly used

sewing machine bed. sewing machine bed. Cylinder bedCylinder bed

The shape of this bed allows the easy The shape of this bed allows the easy rotation of tubular parts like cuffs rotation of tubular parts like cuffs

Sewing Machine Beds …Sewing Machine Beds …

Post BedPost Bed It has relatively small sewing area. It has relatively small sewing area.

Feed of the Arm BedFeed of the Arm Bed This is typically used for closing the This is typically used for closing the

cylindrical parts. cylindrical parts. i.e. Trousers out seam after inseam has i.e. Trousers out seam after inseam has

been sewnbeen sewn

Balancing…Balancing…

Order QuantityOrder Quantity == 3000030000

SMVSMV == 1010

Shift TimeShift Time == 480480

Lead Time Lead Time == 10 days10 days

Plant UtilizationPlant Utilization == 80 %80 %

AttendanceAttendance == 90 %90 %

Average performance of operatorsAverage performance of operators = 90 = 90 %%

Labor requiredLabor required

Total minutes requiredTotal minutes required == 30000*1030000*10

Daily required output Daily required output = = 300000/10 SM300000/10 SM

Hourly required outputHourly required output = = 30000/8 SM30000/8 SM

== 3750 SM3750 SM

Output required per minOutput required per min == 3750/603750/60

== 62.5 SM62.5 SM

Labor RequiredLabor Required == 62.5 /80% * 90% * 62.5 /80% * 90% * 90%90%

Labor requiredLabor required

62.5 * 100 * 100 * 62.5 * 100 * 100 * 100100 ==----------------------------------------------------------

80 * 90 * 9080 * 90 * 90

== 96.4596.45

== 97 People97 People