The document discusses a straight knife cutting machine commonly used in garment factories in Bangladesh. It has a motorized blade that cuts fabric according to patterns. The main parts are the base plate, pressure foot, motor stand, sharp belt, pinion shaft, lever, and knife. It can cut a high depth of fabric in a single pass. Proper maintenance, including lubrication and inspection, is important to ensure the long and safe working of the machine. Potential issues include risks of damage from the high-speed blade and motor weight causing knife deflection.

1. On
Straight knife cutting machine

2. Submitted by:-
Md.Ibrahim Khalil
Intake:19
Department of Textile Engineering
Bangladesh University of Business & Technology

3. cutting section is an essential part of a
garments factory. To make garments
cutting fabric according to the pattern is
must straight knife cutting machine is the
most commonly used machine in the
garments factory of Bangladesh. It is a
complex electro mechanical device where
the cutting blade gets motion from a
motor.

5.  Base Plate.
 Pressure foot.
 Motor Stand
 Sharp Belt
 Three pinion shaft
 Leaver
 Sharp on leaver
 Operating handle
 Power cable carry handle
 Motor
 Oil Can
 On/Off Switch

6.  A base plate :Usually in rollers for easy movement.
 An electric motor: Transmit motion to blade.
 Handle: For the cutter to direct the blade.
 Knife: It cut the fabric
 Knife guard: It used as safety device to prevent
any accident
 Grinding wheel: Used to sharp the knife during
cutting.
 Stand: The backbone of the machine
 Roller wheel: To move the machine over cutting
table easily

7. Marker Making
↓
Fabric Spreading
↓
Placing Marker Paper on to the Lay
↓
Fabric Cutting
↓
Numbering
↓
100% checking & Parts Replacing if needed.
↓
Shorting & Bundling
↓
Sewing/Assembling

8. The main parts of this machine are straight knife, electric
motor, handle, grinder, base plate, stand/ knife holder,
lubricating unit, wheel etc.
 Could be used to cut higher depth of fabric.
 Knife height is 10 cm to 33 cm.
 Knife stroke is 2.5 cm to 4.5 cm.
 Motor r.p.m. is 3000 to 4000.
 Auto grinder is used.
 Auto lubricating unit works for this machine.
 A Handle for the cutter to direct the Knife.
 Knife guard is attached to the front of the knife.
 Sharp & heavy corners can be cut.
 Maximum 70% of knife height is used for fabric lay.

9. Firstly, machine operator spread the fabric lays
in the cutting table. Then marker is placed on
the fabric. After that, straight knife cutting
machine is placed at any corner point of fabric
lays. After that, machine operator switches on
the cutting machine and continues cutting
process as per maker dimension. Finally
cutting is continuing until finishing the marker.

10. Maintenance can be of different types. But following
types are important in this aspect
 Routine maintenance: Lubrication and regular
inspection are the constituents of routine
maintenance. Lubrication ensures long life and safe
working of all the equipment. Inspection tries to
detect fault in equipment so that repairs and
replacement may be undertake at right time.
 Scheduled maintenance: This type of maintenance
provides for inspection, overhaul lubrication and
servicing of the machine at predetermined dates.
Overhauling of machine, cleaning of all components
is normally done in this manner. It involves opening
of the machine into its smallest components and
carry out lubrication.

11.  Flat screw driver
 Star screw driver
 Hammer
 Pliers
 Lubricating oil
 Grease

12.  KEEP-M-KLEEN-WHEEL CLEANER: This is a
spray on solution which keeps sharpening
wheels working at peak efficiency
 CUSTROL:A special formula wetting agent for
synthetic and fusible fabric
 OIL AND GREASE

13.  A large number of fabric lays can be cut by the
machine due to high length of knife & r.p.m. of
the motor. So, productivity is high.
 Automatic grinding.
 Automatically lubrication.
 Comparatively cheep.
 Can be moved easily by wheel.
 Suitable for straight line & curve line.
 Can be cut high curve line than round knife.
 Fabric can be cut from any angle.

14.  High speed of the machine causes high risk of
damage.
 Faulty knife could damage fabric layer.
 Motor weight creates knife deflection which
may be creates faulty pieces.
 Risk is high for physical damage of operator.
 Knife required to replace.

16. Thank you
For listening