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Pet Film Printing Machine Printing , as an efficient and flexible printing method, commonly encounters several major problems: 1. White ink separation 2. Ink stains or ink overflow 3. Transfer film jamming or failure to feed.
White Ink Separation Problem
Cause Analysis
White ink sedimentation: The pigment particles in white ink are relatively large, and prolonged non-use can easily lead to sedimentation, causing ink separation.
Uneven mixing: If the ink is not thoroughly mixed, it will directly affect the printing quality.
Solutions
Regularly shake the white ink
Always shake the white ink thoroughly before use. And it is recommended to use an electric mixer to ensure the ink is completely mixed and prevent sediment accumulation.
Timed stirring system
For equipment that runs for extended periods, a timed stirring system can be installed to ensure that the white ink does not settle.
Proper equipment maintenance
Ensure smooth ink flow in the printer and perform regular cleaning, especially of the ink pipes and print heads.
Ink Stains or DTF transfer Ink Overflow
Cause Analysis
Print head clogging or improper print head calibration: Print head clogging or inaccurate print head calibration may cause ink to drip or spray unevenly during printing.
Improper fabric handling: If the fabric is not completely cooled after heat pressing, or if it is stacked too tightly, it may lead to ink stains.
Environmental factors: The temperature and humidity of the environment can affect the ink curing effect. If the ambient temperature is too low or the humidity is too high, the ink curing speed will slow down, leading to stains.
Unreasonable ink flow settings: Too much or too little ink flow can lead to stains or ink overflow problems.
Solutions
Regularly clean the print heads
Regularly clean the print heads with a dedicated print head cleaning solution to prevent clogging. Print heads should be checked weekly and cleaned as needed.
Calibrate the print heads
Use the printer’s built-in print head calibration function to ensure that the ink is sprayed evenly without overflow.
Properly handle the fabric
After heat pressing, allow the fabric to cool completely before processing or packaging. However, avoid stacking printed fabrics too tightly to prevent ink stains.
Optimize the printing environment
Ensure that the printing environment has a suitable temperature and humidity. If the ambient temperature is too low, use an air conditioner or heater to increase the temperature.
Adjusting Ink Flow
Adjust the ink flow and DTF heat transfer printing speed according to different materials and printing requirements to avoid smudging problems caused by too much or too little ink.
Transfer Film Jamming or Failure to Feed
Cause Analysis:
Excessive or insufficient transfer film tension: If the film tension is not properly controlled, it may lead to uneven feeding and jamming problems.
Paper feeding system malfunction: A dirty paper feeding system or mechanical problems (such as worn rollers) may prevent the film from feeding smoothly.
Solutions:
Adjust transfer film tension
Check if the tension of the paper feeding system is appropriate. Generally, the transfer film tension should be adjusted to a moderate level, avoiding being too loose or too tight, to ensure smooth film feeding.
Clean the paper feeding system
Regularly check the paper feeding system (such as rollers, paper trays, etc.), and clean dust or ink residue to ensure smooth operation of the feeding system.
Replace worn parts
Check if there are any damaged parts in the paper feeding system, and replace worn rollers or guide wheels in a timely manner to ensure the normal operation of the paper feeding system.
