4 Colors High Speed Flexo Printing Machine With Double Rewinding

Q: How is the after-sales service? How long does the machine warranty last?

Once you purchase our machine, we guarantee to provide comprehensive lifelong after-sales service, including repair, technical support, training, and consultation. Our after-sales team will provide you with thoughtful service and help you solve any problems or difficulties encountered in using machine company products. All machines we sell come with a 12-month warranty.

Q: How can I reduce ink drying time on my 4 Colors High Speed Flexo Printing Machine With Double Rewinding without slowing down production?

On a 4 Colors High Speed Flexo Printing Machine With Double Rewinding, slow drying at high speed usually means your drying system is underpowered or airflow is blocked. Upgrade to a hot-air knife dryer with adjustable temperature (40–80°C) and high-velocity nozzles directed immediately after each color station. Use faster-solvent or UV inks compatible with your press. Also reduce ink film thickness by switching to a finer anilox roller (e.g., 300–400 lpi). These changes can cut drying time by 50%, allowing the press to run at 250 m/min without smearing or set-off.

Q: Can I run water‑based inks and UV inks on the same 4 Colors High Speed Flexo Printing Machine With Double Rewinding without cross‑contamination?

Yes, but a 4 Colors High Speed Flexo Printing Machine With Double Rewinding requires thorough cleaning when switching between water‑based and UV inks. UV inks cure instantly and are incompatible with water‑based systems. To avoid contamination, dedicate separate anilox rollers, doctor blades, and chamber seals for each ink type – label them clearly. After running water‑based ink, wash the entire ink circuit with water and mild detergent, then dry completely before adding UV ink. UV ink residue mixed with water‑based ink will coagulate and clog anilox cells. Many printers buy a second set of ink pans and pumps to make the switch in under 30 minutes.

Q: What is the smallest font size I can reliably print on a 4 Colors High Speed Flexo Printing Machine With Double Rewinding?

On a standard 4 Colors High Speed Flexo Printing Machine With Double Rewinding, the smallest readable font size is 4 pt (1.4 mm x‑height) for positive text, and 5 pt for reverse (knockout) text, assuming a high‑quality plate (0.95 mm thickness, 65–70 Shore A) and a 400 lpi anilox roller with 1.5 BCM volume. To go smaller (3 pt), you need a dedicated sleeves system, zero‑deflection cylinders, and very tight registration. At high speed (150 m/min), dot gain will round off fine serifs. Always run a test ramp before production. For most packaging applications, 5 pt is the safe minimum on a two‑color flexo press.

Q: My 4 Colors High Speed Flexo Printing Machine With Double Rewinding leaves streaks in the solid print area. How to fix?

Streaks on a 4 Colors High Speed Flexo Printing Machine With Double Rewinding are usually caused by a damaged doctor blade (nicks or wear), contaminated anilox roller (dried ink in cells), or a scratch on the impression cylinder. First, replace the doctor blade and clean the chamber. If streaks persist, remove the anilox roller and clean it with a specialized anilox cleaner and brass brush – do not use steel. For ceramic rollers, ultrasonic cleaning works best. Check the impression cylinder for embedded debris; polish with fine emery cloth. Finally, ensure the plate has no high spots. Fixing streaks recovers print quality without slowing down.