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LQSD-350A Automatic Center Sealing Bag Making Machine (Servo Motor)

Automatic Center Sealing Bag Making Machine (Servo Motor)
  • LQSD-350A
  • UPG


lUnwinding turret:

Tension force control of unwinding.

1) Permanent tension brake, magnetic powder detent

2) Unwinding positive feeding structure, transducer sends out material on average speed

3) Control mode: computer instruction, dancing roller displacing sensor controls roll sending out speed

4) Fixed taper cone nip unwinding shaft (air expanding shaft)

          Edge position control (EPC)

1) Configuration: screw mandrel secondary control, unwinding turret movement

2) Control modality: reflection electric potentiometer sensor testing, independent control.

3) Tracking accuracy: 0.5mm

4) Adjustment range: 150mm

lFolding section

1) Configuration: two sides folded at same time, one side adjustable

2) Adjustment: manual regulation

lVertical sealing setup:

1) Configuration: vertical disposition iron pressing, cooling assembly spring pressing structure

2) Drive: main electric machinery drives coupling rod of eccentric mechanism to do curve motion

3) Quantity: One team on vertical thermal sealing, one team on cooling, two teams on vertical shaping.

4) Length: 800mm

lHorizontal sealing setup:  

1) Configuration: horizontal disposition iron press assembly spring structure, cooling assembly

2) Drive: main electric machinery drives coupling rod of eccentric mechanism to do vertical motion

3) Quantity: three teams on thermal sealing, one team on cooling

4) Length: 350mm

lFilm feeding device

1) Configuration: pneumatic pressing rubber roller friction type (pneumatic parts using KOGANEI from Japan)

2) Drive: imported fully digital runoff production servo mechanism (Servo motor 1.5Kw, Panasonic Japan)

3) Transmission: synchronous band and wheel

4) Control modality: centralized computer control, synchronous length fixing and automatic photoelectrical tracking system)

lMiddle tension

1) Configuration: dance roller tension force structure, set signal  

2) Control modality: centralized computer control

3) Mechanism of control: complementary trend of dance roller tension movement control the middle servo step length to achieve stop and begin at the same time

4) Testing form: electromagnetism approaching switch (NPN)

5) Adjustment range of tension force: 0.1-0.2mm (computer setting, automatic reciprocate)

lMain transmission device

1) Configuration:  crank rocker push pulling coupling rod structure

2) Drive: Germany SEW motor 1.5KW as main motor, work more steady, reliable and efficiency.

3) Transmission: main transmission electric machinery band 1: 10 high strength toothed gear speed reducer

4) Control modality: centralized computer control

5) Movement mode: main motor running drives frame to do vertical movement

lAutomatic positioning device

1) Testing form: tracking testing of reflection photoelectrical sensor

2) Testing accuracy: 0.01- 0.25mm

3) Integrative positioning accuracy: ≤0.5-1mm

4) Photoelectrical searching range: ±3mm 

5) rectifying equalizing range: ±3mm

6) positioning rectifying method: servo tracks current compensating, photoelectrical automatic movement rectify system

lTemperature control setting:

1) Testing form: thermocouple test

2) Control modality: independent control, PID adjustment, solid state relay

3) Temperature setting range: normal temperature and up to 360℃

4) Temperature testing point: middle part of electric heaterkeep temperature even

lCutting knife

1) Configuration: upper cutting knife + adjustment equipment + fixed bottom cutting knife

2) Form: spring shear knife

3) Transmission: main motor driving, eccentric mechanism vertical movement

4) Adjustment: horizontal movement (double end)

lPunching equipment (using imported parts)

1) Configuration: embowed set supports pneumatic engine lead to main model impact structure

2) Control modality: centralized computer control

3) Drive: Solid-state relay drives electromagnetic valve

4) Quantity of punching set: generally configures one team

5) Air cylinder: Taiwan Airtac

6) Model: rhombus 1 set

lWelding knife setup:

      Vertical: 20mm*1   

      Horizontal: 10mm*3      

lSupporting facilities (Please settle it by client selves)

1) power supply: three-phase 380V,  ±10%, 50HZ five wiring system

2) volume: 20KW

3) air supply: pressure ≥ 0.6Mpa    35 m / min

4) cooling water: 3 L / min




Center Sealing, four side Sealing, Double servo (feeding motors are servo), Double inverter.


BOPP, CPP, PET, nylon and etc plastic laminated film, multilayer coextrusion films, pure aluminum, plating aluminum laminated film, paper plastic laminated film

Highest bag making speed

Normal speed

180 time/min

30-150 time/min

Highest material sending out line speed

≤40 m/min


Size of bag

Width: 55-320 mm

Length: 500 mm (6 times skip function)

Width of sealing

5-50 mm

Bag style

Center Sealing bag with Max width 320mm, four side seal bag

size of material roll

Ø 600*840 mm

Positioning accuracy

≤±1 mm

Hot sealers

One team on vertical thermal sealing, one team on cooling, two teams on vertical shaping,

Three teams on horizontal thermal sealing, one team on horizontal cooling;

Temperature control quantity

11 routes

Temperature control setting range


Power of whole machine


Overall dimension ( length*width*height )


net weight of whole machine

About 3800Kg


Main machine body in black, apple green in enclose



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