1

Band Knife Cutting Machines

By,

Aayushi

Apoorva Choudhary

2

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 machineHorizontal band knife machine

3

Vertical Band Knife 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.

• 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.

4

Horizontal band knife 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.

5

Band Knife Machine

• Band Knife is a stationary cutting machine.

They have fine blades that rotate through a slot in the cutting table while cutting.The operator positions ,controls,and guides the fabric block around the knife.

• They are basically same as band-saw machines the only major difference are the blade edges ,type and speed of the machine.

• It consists of a series of three or more pulleys powered by an electric motor with a continuously rotating steel blade mounted on them.A Band Knife Machine is an endless and looks like a loop.

6

• It is used for cutting of fabric rolls without cardboard inner tube.

• This cutting machine works automatically according to the height of the relevant material.

• This machine is with special blower which decreases resistance between fabrics and table,which enables the fabrics be moved easily and be cut precisely.

• it has adjustable speed to fit different fabrics

7

Band Knife Machine A CUTTING TABLE

THREE OR MORE PULLEYS

STEEL BLADE

ELECTRIC MOTOR

SHARPENING ASSEMBLY

8

Band saw Machine Band Knife Machine

9

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.

10

• 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.

11

Vertical Cutting Stroke Velocity

• The VCSV of a band knife machine is equal to rpm of the blade.

• The blade of a band knife machine circulates in the basic shape of standard conveyor belts;two equal parallel lines whose parallel ends are joined by two semicircles.In such situations,the blade rpm is equal to the motor rpm times 2 πr where r is the radius from the motor shaft to the blade’s perimeter in the semicircle where the motor drives the band Knife.

• In other Band Knife Machines three or more pulleys are used to circulate the blade.In these machines the blade VCSV is equal to the velocity of a point on the perimeter of the drive pulley(s).

12

Advantages of Band Knife Machines Over Other Cutting Machines

• Band Knives are finer and narrower than reciprocating blades which makes it easier to manipulate tight curves and intricate patterns.

• Band Knives are more accurate than vertical knives when used to cut small blocks.

• The Cutting Pitch of band knife blade is higher than the pitch of many st.knife blades thus all segments of the blade gets equal wear n tear.

• Needs less minimum cutting allowance than die cutters.

13

• Balls in air blower help to move the fabric in different direction

• High speed r.p.m. motor is used.

• Very large productivity for limited product Such as collars, cuff,

placket etc.

• Air blower helps to reduce the fabric weight which increases

smooth movement of fabric

• Possible to cut 900 angle of the lay

• Automatic grinder grind the knife instantly.

• They are faster and less labor intensive.

• Has lower noise.

14

Disadvantages of Band Knives

• It is not possible to cut the fabric directly from lay.• Fabric wastage is high.• Work Load is high as machine is stationary and fabric

is movable.• Running cost is higher.• Wouldn’t be used for cutting a whole spread or large

pieces because the the operator would be required to maneuver the block around the table.

• Require fix space

15

Using Band Knives

• Band knives are used when a higher standard of cutting accuracy is required .

• Space must be left around garment parts when planning the marker so that they can be sectioned out using a straight knife and then cut exactly using the band knife.

• When small parts such as collars, cuffs and pockets are cut, a template of metal or fiber board in the shape of the pattern piece may be clamped to the section of lay on top of the marker.

• Band knives are used more in menswear than in womenswear and are often used to cut parts such as the large panels of jackets and overcoats.

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.

17

Blades Available to cut garments

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 76mm 0.80 , 1.00 85 mm 1.20 mm 90 mm 1.00 , 1.20 mm PROVIDED BY: DIAMOND BAND KNIFE

TECHNICAL SPECIFICATION OF DIFFERENT BAND KNIFE

MACHINES

Takayama-TA700

Machine features:a) This machine is with special blower• which decreases the resistance between fabrics

and the table• Enables the fabrics to be moved easily and cut

precisely.b) Adjustable speed to fit different fabricsc)Comes in air cushion type or drive type

FEATURE TAKAYAMA TA-700

TABLE SIZE 1200X1600mm

CUTTING HEIGHT 180mm

KNIFE SPAN 700mm

Richpiece standard series

• Features:Adopts air cushion type• Advantages:a) Straight and accurate cutting from the first layer to

the bottom layerb) Air blowing table provides air cushion for material

easy movementc) Equipped with knife sharpening deviced) High accuracy and vertical cutting finishe) Adjustable knife running speed• APPLICATIONS : cotton,synthetic

fibres,sponge,leather

FEATURE RP-S500 RP-S700 RP-S900 RP-S 1200

ARM LENGTH 500 mm 700mm 900mm 1200mm

THICKNESS OF CUTTING

180mm 180mm 180mm 180mm

VOLTAGE 380v/550W 380v/550W 380v/550W 380v/550W

OSHIMA BAND KNIFE

• Machine with air blowing and knife blade catcher in case of break, complete with stainless steel protecting gloves

• Variable speed control of the blade facilitates the cutting of diverse fabrics

• The blowing from table top makes the airspace under cutting fabric what facilitates the manoeuvring of it.

• Oshima band knife is equipped with the special detector (responsible for the work of band knife blade) and the special protecting blade system (protects band knife blade from escape from the course) in case of break

• There are 2 electromagnetic catchers which block broken band knife blade.Owing to this solution working with band knife machine become to be more safe .

• Table size 1200 mm x 1500 mm.• Gap between the blade and carrier arm is 700

mm.• Cutting capacity maximum 180 mm.• Dimension of the band knife blade 3500 x 10

x 0,45 mm• VOLTAGE 230V

SPECIFICATION

EASTMAN NGAI SHING

EC-700N EC-900N NS810-700 NS810-900

TABLE SIZE 1500*1800 1500*2100 1200*1800 1200*2100

ARM LENGTH 700 900 700 900

SPEED CONTROL 570M/MIN TO 570M/MIN TO1140M/MIN 1140M/MIN

11.5M/SEC TO 11.5M/SEC TO20M/SEC 20M/SEC

MACHINE WEIGHT 265 KG 285KG 280KG 310KG

KNIFE SIZE .45*10*3500mm .45*10*3960 mm

.45*10*3500mm .45*10*3860mm

MOTOR POWER 1HP 1HP 1HP 1HP

VOLTAGE 220V 220V 220V 220V

BLOWER MOTOR .17HP .17HP .25HP .25HP

MACHINE SIZE 1600*800*1900 2200*800*1600 920*1720*1780 920*2120*1780

27

Band Knife Cutting Machines Price Trends

The price curve showed in the graph is calculated among the top high quality band knife cutting machine suppliers, and the band knife cutting machine price is given based on the last seven weeks price trend 

713.26 713.26

5.47 4.2 1.4

28

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.

29

Band Knife Cutting Machine Video:• Band knife cutting machine 2.mp4Band Knife Cutting Machine Catalogue:band-knife-cutting-machine.pdfcosmo_cosmo120_ (1).pdf

30

Thank You………!!!