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Rotogravure Printing Machine

Product Overview

 

A rotogravure printing machine transfers fluid ink from an engraved metallic cylinder directly onto continuous roll substrates using a gravure roll immersed in an ink pan, followed by solvent evaporation in high-velocity drying hoods. Operating on a roll-to-roll (R2R) continuous web path, it is engineered for long-run, high-speed, and high-repeatability printing applications.


Typical installations use a modular multi-deck assembly ranging from 4 to 12 color stations. Configurations incorporate automated flying splicers, electronic line shaft (ELS) or independent servo drives per printing unit, and closed-loop tension controllers. It handles flexible plastic films, metallic foils, and paper substrates while maintaining tight color-to-color registration tolerances across varying line speeds.

 

 
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Machine Types / Models & Configurations

 
 
01
 

Compact In-Line Gravure Press (Series CG-E)

Built for short-to-medium runs using a mechanical line shaft or basic servo setup. Maximum mechanical speed: 180 m/min. Suited for regional converters requiring lower initial capital expenditure and quick job changeovers.

 
02
 

High-Speed Heavy-Duty Gravure Press (Series HG-S)

Engineered for high-volume flexible packaging production. Features fully servo-driven individual decks (Electronic Line Shaft architecture). Maximum mechanical speed: 350 to 400 m/min. Includes dual-position turret unwind and rewind units for zero-speed flying splices.

 
03
 

Gearless Sleeve-Type Gravure Press (Series GS-L)

Utilizes lightweight sleeve cylinders for tool-free, rapid cylinder extraction. Eliminates heavy shaft handling, reducing changeover downtime by up to 50%. Maximum mechanical speed: 300 m/min.

Automatic Electrical Line Shaft Rotogravure Printing Machine

 

Working Principle / Production Process
 

Unwinding & In-Feed Tension Control: The raw web feeds from the primary unwind stand. Load cells and pneumatic dancer rolls measure web tension in real-time, sending feedback signals to regulate braking torque and maintain constant tension (+/- 1 N).

 

Gravure Printing Units: The engraved printing cylinder rotates through the ink pan, filling its micro-cells. A reciprocating doctor blade sweeps excess ink from the non-image surface. The web passes through the nip point between the rubber-coated impression roller and the printing cylinder under regulated pressure to transfer the ink film.

 

Drying Tunnels: The printed web immediately enters a high-velocity impingement drying hood. Independent PID-controlled thermal zones (using steam, thermal oil, or electric heat exchangers) evaporate solvents down to required residual levels.

 

Register Control System: Optical sensors scan register marks printed on the material. A closed-loop processor calculates phase deviations and triggers correction motors to adjust cylinder positions instantly, keeping longitudinal and lateral misregistration within +/- 0.1 mm.

 

Out-Feed & Rewinding: The web passes over chilled water-cooled rollers to set the ink and stabilize substrate temperature before winding into a finished master roll via a dual-position turret rewinder.

 

Key Features

Electronic Line Shaft (ELS) Architecture

Replaces mechanical gear trains with independent servo motors per printing deck, eliminating mechanical backlash and ensuring phase synchronization at high speeds.


Pneumatic Chambered Doctor Blade

Encloses the ink fountain to minimize solvent evaporation, reduce VOC emissions, and stabilize ink viscosity during extended runs.

Pre-Register Positioning

Optical sensors automatically align fresh printing cylinders to target register coordinates prior to engagement, cutting startup substrate waste to under 50 meters.

Bidirectional Heat Recovery

Exhaust air from drying tunnels passes through a plate heat exchanger to pre-heat incoming fresh air, lowering thermal energy consumption.

Modular Split Drying Hoods

Pneumatic opening hoods provide clear, unobstructed access to printing cylinders and web threading paths during setup and maintenance.

 

Technical Specifications

 

Technical Parameter

Series CG-E (Economic)

Series HG-S (High-Speed)

Series GS-L (Sleeve-Type)

Max. Mechanical Speed

180 m/min

400 m/min

300 m/min

Max. Working Speed

150 m/min

350 m/min

250 m/min

Web Width Range

800 to 1200 mm

1000 to 1600 mm

1000 to 1450 mm

Cylinder Diameter Range

100 to 300 mm

120 to 350 mm

150 to 350 mm

Registration Accuracy

+/- 0.15 mm

+/- 0.08 mm

+/- 0.10 mm

Unwind/Rewind Max. Dia.

600 mm

800 / 1000 mm

800 mm

Tension Control Range

20 to 200 N

10 to 250 N

15 to 250 N

Drying Heat Source

Electric / Steam

Steam / Thermal Oil / Gas

Thermal Oil / Electric

 

 
Compatible Materials
 
01/

Plastic Films: BOPP (12 to 60 um), PET (12 to 30 um), LDPE/HDPE (25 to 100 um), CPP (20 to 60 um), PVC, PA.

02/

Metallic Foils: Aluminum Foil (7 to 30 um).

03/

Paper Substrates: Kraft paper, glassine paper, coated paper (30 to 150 g/m2).

04/

Inks & Solvents: Solvent-based systems (toluene/ethyl acetate base) and water-based systems (requiring stainless steel fluid circuits).

 

 
 
Applications

Food Packaging

Confectionery wrappers, snack food pouches, coffee bags, retort pouches, and liquid spout pouches requiring high barrier properties.

Pharmaceutical Packaging

Blister packaging base foils, pharmaceutical composite films, and medical device sterile pouches.

Household & Personal Care

Detergent refill bags, liquid soap pouches, wet wipe packaging, and cosmetic laminates.

Industrial & Decorative Surfaces

Wood grain decorative papers for furniture lamination, wallpaper, and abrasive paper backings.

 

Machine Configuration & Customization

 
 

In-Line Processing Modules: Integration of cold seal adhesive application units, backside printing stations, or inline die-cutting units in a single pass.

 
 

Automatic Viscosity Control: Automated solvent dosing and viscosity measurement loops maintain ink consistency within +/- 2 Zahn seconds during extended print runs.

 
 

Web Inspection Systems: Stroboscopic or 100% surface defect inspection camera systems mounted post-final station for real-time flaw detection.

 
 

Environmental Compliance Options: Integrated LEL (Lower Explosive Limit) sensors monitoring solvent vapor concentrations, coupled with interface ports for external thermal oxidizer solvent recovery systems.

 

 

Manufacturing & Quality Control

 
Machining Precision

Main side frames (40 to 60 mm structural steel) undergo thermal annealing to relieve internal stress, followed by precision line-boring on heavy-duty CNC floor mills to maintain parallelism and center-distance accuracy within 0.01 mm.

Dynamic Balancing

All printing cylinders, guide rollers, and cooling rolls undergo dynamic balancing up to 4000 RPM (meeting ISO 1940 Grade G2.5) to eliminate vibration-induced print chatter.

Electrical Panel Assembly

Control panels are built using industrial-grade programmable logic controllers and modular servo drives, subjected to pre-shipment I/O functional verification.

Factory Acceptance Testing (FAT)

Every press undergoes a 72-hour continuous dry-run test and a live test run utilizing client-provided substrates and inks to verify tension stability and drying capacity prior to crating.

 

Installation & Technical Support

 

Site Preparation Data: Detailed civil foundation drawings, anchor bolt layouts, electrical load profiles, and ventilation specifications are delivered 4 weeks prior to equipment shipment.


Field Commissioning: Mechanical and electrical field engineers supervise machine placement, leveling, utility connections, web threading, and initial trial runs on-site.


Operator Training: Structured training covers machine safety, HMI parameter entry, electronic register calibration, doctor blade angle setup, and preventive maintenance routines.


Remote Diagnostics & Spares: Integrated remote-access modules allow technicians to diagnose PLC logic and drive parameters remotely. Critical mechanical and electrical wear parts are cataloged for rapid dispatch.

 

Frequently Asked Questions

 

 

Q: How does an Electronic Line Shaft (ELS) system improve print registration compared to traditional mechanical shaft drives?

A: An ELS system replaces mechanical gears and bevel boxes with an independent servo motor mounted directly to each printing deck. This eliminates mechanical backlash and torsional twist from long drive shafts. Phase errors between decks are corrected instantly via digital feedback loops, holding longitudinal registration within +/- 0.08 mm at speeds up to 400 m/min.

Q: What measures are implemented to reduce substrate waste during machine startup and speed acceleration?

A: Waste is minimized through pre-registration positioning and closed-loop tension control. The pre-reg system aligns cylinders to target coordinates before engagement, reducing setup waste to under 50 meters. Dancer rolls combined with PID algorithms maintain stable web tension during acceleration ramps, preventing web stretching or slippage that causes out-of-register waste.

Q: Can this rotogravure press handle both solvent-based and water-based inks?

A: Yes, depending on the specified configuration. For water-based inks, all ink pans, pumps, piping circuits, and doctor blade holders are manufactured from corrosion-resistant 304 or 316 stainless steel. Water-based applications also require modified drying hoods with higher air velocity and increased thermal capacity to handle water's higher latent heat of vaporization.

Q: What are the utility requirements (power, air, ventilation) needed for site preparation?

A: Standard installations require:
Electrical Power: 3-phase, 380V/440V, 50Hz/60Hz, with connected loads ranging from 80 kW to 250 kW depending on heater sizing.
Compressed Air: Clean, dry air supplied at 0.6 to 0.8 MPa with a flow rate of 500 to 1000 L/min.
Exhaust Ventilation: Duct connections from drying hoods to plant solvent recovery or thermal oxidizer systems, conforming to local LEL safety standards.

Q: How is volatile organic compound (VOC) compliance managed on the machine?

A: Compliance is maintained via enclosed chambered doctor blades that limit fugitive solvent release at the application point. Drying hoods operate under negative pressure with controlled exhaust dampers. Integrated LEL sensors monitor vapor concentrations inside the ductwork, adjusting fresh air intake ratios to maintain safe operation below regulatory limits.

Q: What is the typical lead time from contract signing to Factory Acceptance Testing (FAT)?

A: Standard manufacturing lead time spans 90 to 120 days, varying by the number of printing decks (e.g., 6-color versus 10-color) and custom ancillary options such as inline inspection systems or automated turret splicers. Custom engineering variations may require additional schedule coordination.

With abundant experience, we are one of the most professional rotogravure printing machine manufacturers and suppliers in China. Please rest assured to wholesale high quality rotogravure printing machine at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.

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