FLEXO PRINTING MACHINE

Stacked Flexo Printing Machine

Stacked Flexo Label Printing Machine, available in 320mm & 470mm printing widths. It supports multi-color overprinting, equipped with dual IR hot air drying and instant UV curing systems, plus an integrated inline die-cutting station. All printing and die-cutting processes are finished in one pass, delivering consistent premium label outputs with boosted production efficiency and superior print quality. 

Technical Specification

1) Printing roller: 3sets, the size is determined by the user from 57teeth to 120teeth

2)anilox cylinders:  1set, the lines can be chosen from 200 to 1000 by the user.

3) Mounting machine: 1 set

4) turn bar: 1set

5) unwind tension controller: 1piece Mitsubishi of Japan

6) transducer: 1pc Taiwan

7) rewind tension controller: 1piece Mitsubishi of Japan

8) magnetic power brake:3pcs  China

9) electromagnetism valve: 2pcs Japan

10) inverter: Taiwan

11) stop automatic when paper lack

12) machine stop automatic when the paper broken

13) Contactor: Schneider France

14) time replay: 1pc Taiwan

15) solid reply: 2pcs Japan

16) Temperature Controller: China

17) All air Switches: Schneider France

18) Main motor : Taiwan

19)Other low-pressure wiring: Schneider France

All the rollers are deal with high temperature.

Characteristics:

1)  The main motor adopts imported inverter to govern a stepples speed adjustment.

2) The printing units are all equipped with a group of infrared dryers respectively.

3) Each IR dryer device of printing unit

4) Feeding and rewinding are controlled through magnetic particle brake and clutch

(Japanese Mitsubishi auto tension controller).

5) Un winder and re winder adopt air core holder.

6)one unit rotary station

7) Adopt ceramic anliox roller which offers  durability, wear resistance and corrosion resistance, also is more efficient on production by reducing the times of

changing rollers.

8) The printing unit can register in 360 degrees. Each printing unit can be

independently geared and loosen to have rest of units continue to printing.

9) The inking roller will be automatically off impression when press stop and rotate 

at lower speed in order to keep the ink from being drying.

10) Paper unwind, printing, laminating, rotary diecutting, waste removal

and rewinding can be processed in one pass. It has characterized by wide

application, fast printing speed and high economic efficiency ink will not

contaminate environment. So it is an idea printing machine for the business form,

Tag and high end pressure sensitive label.

1. Packing: Sea worthy new wooden case

2. Quality Guarantee: all parts should be covered by the factory for free of charge within one- year guarantee date of shipment. If the machine need repair within this period, the seller shall provide technical support. in case problem can not be sole over the phone the buyer will provide transportation and accommodations ask seller coming for repair.

3. Term of trade: FOB NINGBO PORT, CHINA

4. Payment: 50% T/T payment for deposit, the rest 50% T/T payment before shipment.

6. Delivery time: machine shall be sent within 5-10 working days after getting the deposit.

1. What is a stacked flexo printing machine?

A stacked flexo printing machine is a type of flexographic press where each color printing unit is arranged vertically in a stacked structure. It is widely used for printing plastic films, paper, and packaging materials.

2. What materials can it print?

Common materials include:

· Plastic films (PE, PP, BOPP, PET)

· Paper and kraft paper

· Laminated packaging films

· Non-woven fabric

· Aluminum foil (some configurations)

3. What industries use stacked flexo printing machines?

· Flexible packaging industry

· Food packaging

· Shopping bags production

· Label and sticker printing

· Industrial packaging materials

4. What is the printing speed?

Depending on model:

· Standard: 50–150 m/min 

· High-speed models: up to 200–250 m/min 

5. What is the number of color units available?

Common configurations:

· 2 colors

· 4 colors

· 6 colors

· 8 colors or more (custom machines)

6. What is the printing accuracy?

· Typical registration accuracy: ±0.1–0.2 mm 

· Depends on servo system and tension control stability

7. What is the difference between stacked type and CI flexo machine?

· Stacked flexo: Each color unit is independent and vertically arranged

· CI flexo: All colors print on a single large central impression cylinder

· CI is better for high-quality film printing; stacked is more flexible and cost-effective

8. What is the main advantage of stacked flexo machine?

· Flexible configuration (easy color unit adjustment)

· Suitable for different materials

· Lower cost compared to CI flexo

· Easy maintenance and operation

9. What is the control system used?

· PLC control system

· Servo motor drive system (for high-end models)

· Touch screen HMI interface

· Automatic register control system

10. What is the drying system?

Depending on material:

· Electric heating system

· Hot air drying

· Infrared (IR) drying system

· UV curing system (optional)

11. What causes poor printing registration?

Common reasons:

· Tension instability

· Material stretching or shrinkage

· Servo misalignment

· Improper setup of printing units

· Ink viscosity issues

12. What inks are used in flexo printing?

· Water-based ink (most common for eco-friendly printing)

· Solvent-based ink

· UV ink (for special applications)

13. Can it print shrink sleeve film?

Yes, stacked flexo machines can print:

· PETG shrink film

· PVC shrink film

· OPS shrink film
But requires precise tension and drying control.

14. What is the role of tension control system?

It ensures:

· Stable material feeding

· Accurate color registration

· Reduced material stretching or wrinkling

15. What is an anilox roller?

An anilox roller is a key component that transfers a controlled amount of ink to the printing plate for consistent print quality.

16. What are common printing defects?

· Color misalignment

· Ink smearing

· Uneven ink density

· Wrinkles in material

· Ghosting or banding

17. Why does ink drying affect print quality?

If drying is insufficient:

· Ink smudging occurs

· Poor stacking or rewinding
If over-dried:

· Material deformation

· Brittleness in film

18. Can it be integrated with slitting or die cutting?

Yes, it can be part of a production line:

· Printing → Lamination → Slitting → Die cutting → Rewinding

19. What is the typical setup time for a new job?

· Simple job: 30–60 minutes 

· Complex multi-color job: 1–2 hours 

20. What is the lifespan of a stacked flexo machine?

· Typically 10–15 years or more 

· Depends on maintenance and usage intensity

21. What maintenance is required?

· Cleaning anilox rollers

· Checking bearings and gears

· Servo system calibration

· Ink system cleaning

· Tension system inspection

22. What is the biggest advantage compared to gravure printing?

· Lower plate cost

· Faster job changeover

· More flexible for small and medium orders

· Easier operation

23. What is the biggest challenge in operation?

· Color registration control

· Operator skill level

· Ink consistency management

· Tension stability

24. What is the difference between inline and stacked flexo machines?

· Stacked type: Independent vertical units

· Inline type: Horizontal sequence layout
Stacked is more compact and flexible.

25. What is the most common production issue?

· Registration drift during long runs

· Ink viscosity changes

Material tension fluctuation