I. Key Acceptance Indicators: Directly Determining Printing Quality
1. Color Registration Accuracy (Alignment Accuracy)
When printing multi-color patterns, misalignment (commonly known as "plate misalignment") will lead to problems such as ghosting and missing areas.
Acceptance Standard: Horizontal and vertical deviations should be controlled within ±0.1mm; high-precision models can reach ±0.05mm.
Detection Method: Print a multi-color test pattern (such as concentric circles and crosshairs), and compare the alignment of each color layer using a magnifying glass or microscope.
2. Print Clarity and Resolution
Higher resolution is not always better; the accuracy of the mechanical transmission system is more important.
Common printhead resolutions are 720dpi or 1440dpi, but fabric fibers are relatively coarse, and the visual difference beyond 720dpi is limited.
More crucial are the accuracy of the guide rails, servo motors, and rollers, ensuring that the pattern has no broken lines, no ghosting, and uniform seams.
3. Drying Response Capability: Rapid surface drying is crucial after each color printing pass to prevent smudging or screen clogging.
Models equipped with an IR flash drying device can complete surface drying within 3–10 seconds, improving overall cycle time.
Insufficient drying can lead to color slippage in subsequent color registrations, affecting yield.
II. Production Stability and Efficiency: Impact on Delivery Capability
1. Effective Output per Unit Time: Under standard conditions, a fully automatic oval printing machine can print 300–900 pieces per hour, depending on the number of colors and operator proficiency.
Acceptance Recommendation: Conduct continuous operation tests, record the actual output within one hour, and compare it with the manufacturer's promised value.
2. Automation Level and Ease of Operation: High-quality equipment is equipped with a PLC control system and touchscreen, supporting automatic start/stop, output statistics, fault alarms, and other functions.
Modular design supports future expansion of printheads to adapt to business growth needs.
Ordinary workers can learn to operate the machine after short-term training, reducing reliance on experienced operators.
3. Registration Stability (Long-Term Performance) Run continuously for over 2 hours and observe for any registration misalignment due to thermal expansion.
High-quality equipment employs constant temperature control and a high-rigidity structure to ensure consistent performance during extended operation.
III. Applicability and Maintenance Costs: Determining Long-Term Value
1. Paper Compatibility Does the machine support multiple materials such as plastisol, water-based inks, and traditional inks?
Plastisol printing requires an automatic ink return function to prevent screen clogging.
For color printing on dark fabrics, it's necessary to confirm support for white ink underlay (digital direct-to-garment printing).
2. Screen Adjustment Flexibility Fully automatic printing machines eliminate the need for traditional screen frames; the screen size can be freely adjusted, saving on plate-making costs.
Models with uniform screen tension and easy screen replacement are more conducive to frequent production changes.
3. Maintenance Convenience and Consumable Costs Printheads, squeegees, and silicone rollers are consumable parts; prioritize equipment using universal printheads from Kyocera, Ricoh, Epson, etc.
