In daily operation, printing slotting and die-cutting machines often encounter problems such as inaccurate size, indentation breakage, and slotting burrs. To help you quickly locate and solve these common faults, the following table summarizes typical problems and their solutions.
| Issue type |
Specific problem phenomena |
Main reasons |
Solve way |
| Size and position issues |
The die-cutting/slotting position is not accurate, and the size of the cardboard box becomes smaller after being placed |
Typography/layout errors; Cardboard has high moisture content and shrinks after drying; Cardboard warping; Machine rules are inconsistent or loose |
Verify and correct the printed and die cut versions; Control the moisture content of the cardboard (about 10% ± 2), and if the moisture is too high, it should be naturally dried; Flatten warped cardboard or place them separately; Check and adjust the positioning rules, tighten loose parts |
| Creasing quality issues |
Fracture of creasing line (longitudinal line fracture, explosion line), unclear creasing, cracking at the crease |
Excessive pressure; Improper selection or wear of crimping wheel/copper wire; The cardboard is too dry or the material is poor; The indentation line is too deep or too narrow |
Adjust the pressure of the pressure roller to ensure that it is easy to fold and not crushed; Replace the appropriate crimping wheel (such as increasing the transition arc) or copper wire according to the thickness of the cardboard; Spray steam on cardboard to increase humidity or adjust the process; Reduce the thickness of the backing paper and widen the creasing line |
| Slotter&Die cutting quality issues |
Slotting burrs, continuous cutting or cardboard flattening, uneven die-cutting edges |
Blade wear or poor quality; Rubber pad wear or insufficient elasticity; Inappropriate gap between slotting knife and rubber pad (uncomfortable pressure) |
Replace sharp blades; Repair or replace worn rubber pads (recommended thickness not less than 4mm); Adjust the pressure or blade pad again, check and adjust the height of the sponge in the slot and the gap inside |
| Equipment operation and adhesion issues |
After die-cutting, the cardboard sticks to the blade, the machine vibrates heavily/makes abnormal noises, and the motor overheats/becomes weak |
The rubber around the blade is too thin/hard; Blade wear; Wear/deformation of vibrating components (such as cutting wheels and bearings); Motor overload or component failure |
Replace the rubber with a suitable hardness and stick it with a moderate amount of tightness; Check and replace deformed or worn cutting wheels, bearings, gears, and other components; Reduce cutting load and replace with high-quality or specialized blades |
Operation and maintenance suggestions
To reduce the occurrence of malfunctions, it is also necessary to pay attention to daily operating habits and equipment maintenance.
1. Pay attention to the condition of the cardboard: Before production, the moisture content of the cardboard should be checked to avoid using cardboard that is too damp or too dry. For warped cardboard, flatten it first before production.
2. Standardize plate installation and adjustment: The installation of printing plates and die-cutting plates should be accurate and firm. Regularly inspect and clean the crimping wheel, slotting knife, and rubber pad, and replace worn parts in a timely manner.
3. Reasonably adjust pressure: Pressure adjustment is key. Whether it is printing pressure, die-cutting pressure, or line pressure, they all need to be finely adjusted according to the condition of the cardboard, following the principle of "the minimum pressure that can achieve good results", to avoid excessive pressure damaging the cardboard and equipment.
4. Strengthen regular maintenance of equipment: Regularly check whether mechanical fasteners are loose, clean and lubricate moving parts, timely replace aging bearings, gears, etc., which can effectively prevent quality problems caused by decreased equipment accuracy.
Summary
The key to dealing with faults in printing slotting and die-cutting machines lies in careful observation and systematic analysis: first, inspect the cardboard raw materials and plate making process, then check equipment adjustments, pressure settings, and mold conditions, while not forgetting standardized daily maintenance. Developing the habit of recording faults and handling methods can help you accumulate experience and make problem-solving more efficient.
Your message must be between 20-3,000 characters!
