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Cutting MachineKnife cutter

National Institute of Technology Agartala

Presented By:Suraj Kumar Yadav 15UCH059Swarnali Debnath 15UCH061Mayank 15UCH060

Guided by:Dr. Sudev Das

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INTRODUCTION

• CUTTING:• CUTTING IS THE PROCESS WHICH IS USED TO REMOVE MATERIAL FROM THE WORK

PIECE BY MEANS OF SHEAR DEFORMATION. CUTTING MAY BE ACCOMPLISHED BY SINGLE POINT OR MULTI POINT TOOLS. CUTTING TOOLS MUST BE MADE OF THE MATERIAL HARDER THAN THE MATERIAL WHICH IS TO BE CUT, AND THE TOOL BE ABLE TO WITHSTAND THE HEAT GENERATED IN THE METAL CUTTING PROCESS. ALSO THE TOOL MUST HAVE SPECIFIC GEOMETRY SO THAT THE CUTTING EDGE CAN CONTACT THE WORK PIECE WITHOUT THE REST OF THE TOOL DRAGGING ON THE WORK PIECE SURFACE.

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KNIFE

• A KNIFE IS TOOL WITH A CUTTING EDGE OR BLADE HAND-HELD OR OTHERWISE,WITH MOST HAVING A HANDLE. SOME TIME OF KNIVES ARE USED AS THE DINING TABLE(EX.-BUTTER KNIVES,STEAK KNIVES) AND KNIVES USED IN THE KITCHEN.

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ROUND KNIFE CUTTING MACHINE

BY-SWARNALI DEBNATH

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ROUND KNIFE CUTTER

• THIS MACHINE IS CALLED ROUND KNIFE CUTTING MACHINE BECAUSE ITS CUTTER IS ROUND SLIGHTLY OCTAGONAL IN SHAPE. THIS MACHINE IS SMALL IN SIZE, FLEXIBLE AND USED FOR SMALL PRODUCTION. IT IS ALSO POPULAR CUTTING MACHINE.

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FEATURES OF ROUND KNIFE CUTTING MACHINE

THE MAIN PARTS OF THE MACHINE ARE BASE PLATE, ELECTRIC MOTOR, HANDLE AND KNIFE GUARD.

KNIFE DIAMETER VARIES FROM 60 TO 20 CM.

MOTOR RPM IS 800 TO 1600. IT DEPENDS ON THE MACHINE.

EASY TO HANDLE DUE TO LOW WEIGHT.

FLEXIBLE MOVEMENT HELPS TO CUT NON LINEAR SHAPE.

MAXIMUM 40% OF THE KNIFE DIAMETER CAN BE USED FOR FABRIC LAY.

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ROUND KNIFE CUTTING MACHINE.

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ADVANTAGES OF ROUND KNIFE CUTTER

SUITABLE FOR CUTTING SINGLE PLY AS WELL AS MULTIPLIER LAYER.

EASY TO HANDLE AND OPERATE.

SUITABLE FOR SMALL SCALE CUTTING.

TO CUT THE LARGE PARTS OF GARMENTS.

SUITABLE FOR GENTLE CURVE LINE CUTTING

WITH A SAME RPM EFFICIENCY IS 10 TIMES BETTER THAN THE STRAIGHT KNIFE CUTTER.

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DISADVANTAGES OF ROUND KNIFE CUTTER

VERY LOW RPM AND KNIFE HEIGHT.

MANUAL GRINDER IS USED

LOW PRODUCTIVITY’

NOT SUITABLE FOR LARGE PRODUCTION.

DIFFICULT TO CUT SMALL COMPONENTS AND HIGH CURVES.

LUBRICATION IS MANUALLY DONE.

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USES AND APPLICATION

• IT IS USEFUL FOR GENTLE CURVE LINE CUTTING, CUTTING OF FABRIC BLOCK FROM LAY, BIG PARTS CUTTING AND SMALL SCALE CUTTING.

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STRAIGHT KNIFE CUTTING MACHINE

BY-SURAJ KUMAR YADAV

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STRAIGHT KNIFE CUTTING MACHINE

• STRAIGHT KNIFE CUTTING MACHINE IS THE WORLD’S MOST POPULAR AND MOST VERSATILE. AVAILABLE IN ALL STANDARD ELECTRICAL CONFIGURATIONS, WITH THE LARGEST VARIETY OF SIZES AND BLADE SPEEDS IN THE INDUSTRY. IT IS WIDELY USED IN BANGLADESHI GARMENT INDUSTRY.

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[STRAIGHT KNIFE CUTTING MACHINE]

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FEATURES OF STRAIGHT KNIFE CUTTINGS MACHINE

• THE MAIN PART OF THIS MACHINE ARE STRAIGHT, ELECTRIC MOTOR, HANDLE, GRINDER, LUBRICATING UNIT, BASE PLATE, WHEEL ETC.

• IT COULD BE USED TO CUT HIGHER DEPTH OF FABRIC.

• KNIFE HEIGHT IS 10CM TO 33M AND STROKE IS 2.5CM TO 4.5CM.

• MOTOR RPM IS 3000 TO 4000.

• MACHINE WEIGHT IS AROUND 12 TO 15 KG.

• KNIFE CUT THE FABRIC VERY FAST DUE TO HIGH SPEED OF MOTOR WHICH INCREASE THE RISK OF MOTOR.

• SHARP AND HEAVY CORNERS CAN BE CUT.

• DIFFERENT TYPES OF KNIFE EDGES USED TO CUT DIFFERENT OBJECT.

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MECHANISM

• THE STRAIGHT KNIFE CUTTING MACHINE CONSISTS OF A BASE PLATE, AN UP RIGHT STAND TO HOLD THE VERTICAL BLADE, MOTOR, A HANDLE FOR MOVING ASSEMBLY, A SHARPENING DEVICE AND A HANDLE TO TRANSFER THE WHOLE ASSEMBLY FROM ONE PLACE TO ANOTHER. 

TWO KINDS OF POWER ARE REQUIRED TO OPERATE A STRAIGHT KNIFE. MOTOR POWER DRIVES THE RECIPROCATING BLADE AND OPERATOR POWER DRIVES THE KNIFE THROUGH THE LAY. NORMALLY THE AVAILABLE BLADE HEIGHTS VERY FROM 10 CM TO 33 CM AND NORMALLY AVAILABLE STROKES VARY FROM 2.5 TO 4.5 CM. THE GREATER THE BLADE MOVEMENT THE FASTER THE BLADE CUTS THE FABRIC AND MORE EASILY THE OPERATOR CAN MOVE THE MACHINE.

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.• THE MOST IMPORTANT CONSIDERATION IS SELECTING A STRAIGHT KNIFE IS THE POWER

REQUIRED FROM THE OPERATOR TO MOVE THE KNIFE IS THE POWER REQUIRED FOR THE OPERATOR TO MOVE THE KNIFE THROUGH THE LAY. OPERATOR EFFORT IS AFFECTED BY THE WEIGHT OF THE MOTOR, THE SHAPE OF THE STAND, HANDLE HEIGHT, STROKE, SHARPNESS OF BLADE AND THE BASE PLATE MOVEMENT. 

THE NORMAL BLADE HAS A STRAIGHT EDGE THAT VARIES FROM COARSE TO FINE DEPENDING UPON THE TYPE OF FABRIC BEING CUT. WAVY EDGED KNIFES ARE USED TO REDUCE THE HEAT GENERATION AND HENCE CAN BE USED FOR CUTTING SYNTHETIC MATERIALS WITHOUT FUSING DIFFICULTIES. THE SPEED OF THE BLADES CAN ALSO BE ADJUSTED BY HAVING VARIABLE SPEED MECHANISM. 

THE STRAIGHT KNIFE IS A COMMON MEANS OF CUTTING LAYS IN CONVENTIONAL CUTTING ROOMS BECAUSE IT IS VERSATILE,, PORTABLE, CHAPTER THAN A BAND KNIFE AND EASY TO MAINTAIN. EVEN IF A BAND KNIFE IS USED FOR MAIN CUTTING OPERATION, A STRAIGHT KNIFE WILL BE USED TO SEPARATE THE LAY INTO SECTIONS FOR EASIER HANDLING. 

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STRUCTURE

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1. Knife 2. Sharpener 3. Motor 4. Fabric presser 5. Base plate 6. Moving handle 7. Transport handle 

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WORKING PRINCIPAL

• AT FIRST, FABRIC SPEED ON THE CUTTING TABLE.

• THEN MARKER IS PLACED ON FABRIC.

• AFTER THAT, CUTTING MACHINE IS PLACED AT ANY CORNER POINT OF FABRIC.

• THEN, SWITCH ON THE MACHINE AND CONTINUE CUTTING AS PER MARKER DIMENSION.

• FINALLY, THE CUTTING IS CONTINUE UNTIL FINISH THE MARKER.

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ADVANTAGE OF STRAIGHT KNIFE CUTTEING MACHINE

• A LARGE NUMBER OF FABRIC LAYERS CAN BE CUT BY THIS MACHINE DUE TO HIGH LENGTH OF KNIFE AND RPM SPEED SO PRODUCTIVITY IS HIGH.

• AUTOMATICALLY LUBRICATION AND GRINDING

• COMPARATIVELY CHEAP

• CAN BE MOVE EASILY BY WHEEL

• FABRIC CAN BE CUT BY ANY ANGLE.

• CAN BE CUT HIGH CURVE LINE THAN ROUND KNIFE.

• SUITABLE FOR STRAIGHT LINE AND CURVE LINE

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DISADVANTAGE OF STRAIGHT KNIFE CUTTING MACHINE

• HIGH SPEED OF 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

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APPLICATION

• IT IS SUITABLE FOR STRAIGHT LINE CUTTING.

• IT IS SUITABLE FOR CURVE LINE CUTTING AND LARGE PART CUTTING.

• IT IS MOST USEFUL CUTTING INSTRUMENT IN APPAREL CUTTING.

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BAND KNIFE CUTTING MACHINE

BY-MAYANK KHAIRWAR

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INTRODUCTION

• A BAND KNIFE IS A POWER TOOL USED FOR CUTTING CLOTH. VERY SIMILAR IN OPERATION TO A BAND SAW, IT HAS AN ENDLESS LOOP BLADE AND THE MATERIAL TO BE CUT IS SUPPORTED BY A FLAT TABLE.

• BAND KNIFE BLADES ARE USED ON TWO TYPES OF MACHINES DEPENDING ON THE MATERIAL BEING CUT/PROCESSED:

VERTICAL BAND KNIFE MACHINE

HORIZONTAL BAND KNIFE MACHINE

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VERTICAL BAND KNIFE CUTTING MACHINE

• ON A VERTICAL BAND KNIFE MACHINE USUALLY A NARROW WIDTH BAND KNIFE BLADE IS USED, THE MOST COMMON WIDTH BEING 10MM. THE LENGTH OF THE BAND KNIFE BLADE DEPENDS ON THE SUPPLIER OF THE BAND KNIFE MACHINE.

• THE DIMENSIONS ARE INDICATED ON A SMALL METAL TAG PASTED OR RIVETED ON THE MACHINE.

• THE VERTICAL MACHINE BAND KNIFE BLADE IS MOST COMMONLY TWISTED 180 DEGREES TO ENABLE CUTTING WHILE ADVANCING THE TABLE AND ALSO WHILE RETRACTING THE WORK TABLE.

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• IT HAS BEEN OBSERVED THAT A NARROW WIDTH ON A VERTICAL BAND KNIFE MACHINE GIVES BETTER DIMENSIONAL ACCURACIES ON THE FOAM BLOCK.

• THE WIDER THE VERTICAL MACHINE BAND KNIFE - MORE THE DEFLECTION AND SIZE VARIATION FROM ONE END TO THE OTHER EXTREME END.

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HORIZONTAL BAND KNIFE CUTTING MACHINE

• HORIZONTAL BAND KNIFE BLADES ARE WIDER USUALLY 30MM WIDE FOR FOAM CONVERTING IS POPULAR, FOR LEATHER GOODS 50MM WIDE BLADE IS POPULAR, 85MM WIDTH IS POPULAR FOR THE TANNERY SPLITTING BAND KNIFE.

• THERE ARE OTHER WIDTHS DEPENDING ON THE MACHINE MANUFACTURER. THE HORIZONTAL MACHINE BAND KNIFE BLADE IS SUPPORTED BY A GUIDE TO GIVE DIMENSIONAL ACCURACIES WHILE CUTTING/SPLITTING.

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BAND KNIFE MACHINE

A CUTTING TABLE

THREE OR MORE PULLEYS

STEEL BLADE

ELECTRIC MOTOR

SHARPENING ASSEMBLY

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STANDARD EQUIPMENTS• VARIABLE SPEED WITH INVERTER MOTOR-KNIFE SPEED IS EASILY CONTROLLED BY INVERTER SYSTEM

ACCORDING TO THE TYPE OF MATERIAL. INVERTER SPEED CONTROL SYSTEM PROVIDES SMOOTH CUTTING AT THE HIGH AND LOW SPEED.

• BALL NOZZLE AIRFLOW WORK TABLE- AIR MATS IS FORMED ON THE TABLE TO MOVE CUTTING MATERIAL LIGHTLY, SMOOTHLY AND PROVIDES EASY CUTTING WITHOUT COLLAPSING THE PILE OF FABRICS.

• AUTOMATIC SHARPENING DEVICE-ORIGINALLY DESIGNED AUTOMATIC SHARPENING DEVICE IS EQUIPPED. VARIOUS GRITS OF SHARPENING STONE ARE AVAILABLE ACCORDING TO THE MATERIAL.

• KNIFE COOLING SILICON PAD- SILICON PACK IS EASILY REMOVED AND INSTALLED. IT ELIMINATES THE FUSION OF CHEMICAL YARN AND INTERLINING CLOTH YARN.

• KNIFE SPEED DIGITAL DISPLAY-KNIFE SPEED IS SHOWN ON THE DIGITAL INDICATOR AND EASILY CONTROLLED.

• CARRYING CASTER- CARRYING CASTER IS EQUIPPED FOR EASY REMOVAL TO MEET THE REQUIREMENT OF RELOCATION

• CARBIDE-TIPPED KNIFE-GUIDING PLATE – FOR CUTTING EXTREMELY STRONG MATERIALS

• CARBIDE-TIPPED BLADE SCRAPER – FOR AUTOMATIC KNIFE CLEANING.

• MOTOR-PROTECTION SWITCH – AUTOMATIC OVERLOAD PROTECTION

• KNIFE-WETTER – FOR PLASTICS, RUBBER MATERIALS AND THE LIKE.

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Band Saw Machine Band Knife Machine

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BLADES AVAILABLE TO CUT GARMENTS

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SIZES OF BLADES AVAILABLE WIDTH THICKNESS 5 MM 0.80 MM 10 MM 0.45 , 0.50 MM 12 MM 0.45 , 0.50 , 0.60 MM 15 MM 0.45 , 0.50 , 0.60 MM 20 MM 0.45 , 0.50 , 0.60 MM 25 MM 0.45 , 0.50 , 0.60 MM 30 MM 0.45 , 0.50 , 0.60 MM 40 MM 0.50 , 0.60 MM 50 MM 0.60 , 0.80 , 1.00 MM 60 MM 0.60 , 0.80 , 1.00MM PROVIDED BY: DIAMOND BAND KNIFE

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ADVANTAGE

• (1)-SUITABLE FOR ANY TYPES OF LINE.(2)-SUCH AS COLLARS, CUFF, PLACKET ETC.(3)-VERY LARGE PRODUCTIVITY FOR LIMITED PRODUCT.(4)-AUTOMATIC GRINDER GRIND THE KNIFE INSTANTLY.(5)-AIR BLOWER HELPS TO REDUCE THE FABRIC WEIGHT WHICH INCREASES SMOOTH MOVEMENT OF FABRIC.(6)-POSSIBLE TO CUT 90*ANGLE OF THE LAY.(7)- INTENSITY OF ACCIDENT IS LOW.

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DISADVANTAGES

• (1)-RUNNING COST IS HIGHER.(2)-REQUIRED FIX SPACE.(3)-NOT POSSIBLE TO CUT FABRIC DIRECTLY.(4)-WORK LOAD IS HIGHER AS MACHINE IS STATIONARY AND FABRIC IS MOVABLE.(5)-FABRIC WASTAGE IS HIGH.(6)-NOT SUITABLE FOR LARGE COMPONENT DUE TO THE LENGTH OF THE TABLE.

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BAND KNIFE IN OTHER INDUSTRIES

• BAND KNIFE BLADES ALSO HAVE APPLICATIONS FOR CUTTING/SLITTING OR CONVERTING FOAM, MEAT PROCESSING, AND PACKAGING INDUSTRIES

• BAND KNIFE BLADES ARE ALSO USED FOR SPLITTING LEATHER, PAPER, EVA/RUBBER AND CARPETS.

• HORIZONTAL BAND KNIFE BLADES ARE WIDER USUALLY 30MM WIDE FOR FOAM CONVERTING IS POPULAR, FOR LEATHER GOODS 50MM WIDE BLADE IS POPULAR, 85MM WIDTH IS POPULAR FOR THE TANNERY SPLITTING BAND KNIFE.

• THERE ARE OTHER WIDTHS DEPENDING ON THE MACHINE MANUFACTURER. THE HORIZONTAL MACHINE BAND KNIFE BLADE IS SUPPORTED BY A GUIDE TO GIVE DIMENSIONAL ACCURACIES WHILE CUTTING/SPLITTING.

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SAFETY EQUIPMENTS

GLOVES

MADE OF STAINLESS STEEL ACCORDING TO THE EUROPEAN STANDARDS EN1082-1

ELECTROMAGNETIC CATCHERS

IT PROTECTS THE BAND KNIFE BLADE FROM ESCAPING FROM THE COURSE.

TWO CATCHERS BLOCK THE BROKEN BAND KNIFE HENCE CUTTING BECOMES SAFE.

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THANK YOU SO MUCH…….FROM

SURAJ KUMAR YADAV.

SWARNALI DEBNATH.

MAYANK KHAIRWAR.