Do Not Be Misled by Printing Line Speed! Four-Step Scientific Decision-Making Method for Unit-Type Flexographic Printing Equipment

When packaging printing factories select Unit-Type Flexographic Printing Equipment, they tend to focus only on the nominal printing line speed of the machine, while ignoring actual production deviations caused by plate mounting structure, substrate adaptability and ink compatibility. Establishing a standardized selection process helps avoid mismatches between Unit-Type Flexographic Printing Equipment and working conditions.

Step 1: Quantify Production Requirements and Calculate Basic Indicators

Convert order requirements into quantifiable parameters for benchmarking Unit-Type Flexographic Printing Equipment.

1.1 Calculation of Capacity and Specification Indicators

Formula for theoretical hourly capacity: Theoretical hourly output = Printing line speed (m/min) × 60Actual effective capacity = Theoretical hourly output × 65%‑82%, accounting for downtime losses from plate changing, roll replacement and sample inspection.

1.2 Sort out Boundary Conditions

1. Material parameters: Common substrate types including cardboard, kraft paper, non-woven fabric and composite paper, as well as the maximum unwinding and rewinding diameter of raw material rolls.

2. Process quality: Confirm printing repeat length and registration accuracy, and distinguish application requirements for water-based ink and UV ink.

3. Working conditions: Confirm whether extended functions such as quick sleeve change, automatic pre-registration and online inspection are required.

4. Site conditions: Check the overall dimension of the equipment, and verify workshop layout space and 380V power supply conditions.

Step 2: Classify Technical Routes and Distinguish Equipment Grades

Basic gear-driven unit models adopt a gear transmission structure, with a printing line speed range of 120‑180m/min. They target conventional paper bags and ordinary paper product orders, featuring moderate equipment investment and operation threshold, suitable for production scenarios with few specification changes.

Standard petal-type servo models adopt a petal quick plate mounting structure, with a printing line speed range of 160‑220m/min. They support mixed printing of various papers and non-woven fabrics, equipped with automatic pre-registration to shorten plate adjustment time, and fit multi-category switching orders for food and pharmaceutical packaging.

High-end full-servo sleeve models are equipped with sleeve plate cylinders and shaftless servo drive, with a printing line speed range of 180‑240m/min. The printing repeat length is not restricted by tooth pitch, compatible with both water-based ink and UV ink. These models suit large-batch orders with frequent plate replacement and high requirements for registration stability, and the whole machine occupies a larger floor area.

Parameter definition: Process compatibility refers to the plate mounting, ink and substrate processing achievable by the equipment. Different Unit-Type Flexographic Printing Equipment has restrictions on printing substrates and ink types.

Step 3: Parameter Matching to Complete Requirement-Equipment Benchmarking

When selecting Unit-Type Flexographic Printing Equipment, check indicators item by item:

1. Web width: The maximum printing width of the equipment shall be greater than or equal to the actual web width of order rolls.

2. Materials: Confirm the substrate range adapted to the model, and ensure the printing repeat length falls within the equipment parameter range.

3. Process: For orders with frequent plate replacement and food & pharmaceutical packaging printing, select models with quick change and pre-registration configurations.

4. Power supply: Confirm 380V power supply in the workshop, and reserve space for equipment placement and maintenance operation.

Step 4: Secondary Screening Based on Scenarios and Operation & Maintenance Conditions

Adopt the "If… Then…" conditional logic to screen Unit-Type Flexographic Printing Equipment:If the products are ordinary paper bags and conventional paper products with few order specification changes, select basic gear-driven unit models.If the business covers food and pharmaceutical packaging with frequent switching among multiple substrates, standard petal-type servo models are preferred.For large-batch orders featuring frequent plate replacement and mixed use of water-based and UV ink, select high-end full-servo sleeve models.If order specifications change frequently, priority shall be given to evaluating the time consumed for plate changing and adjustment, instead of directly referring to the nominal maximum printing line speed.

Conclusion: Quick Decision Summary

Complete the four-step screening to obtain 2‑3 candidate models, then evaluate optional modules such as drying system and unwinding & rewinding units.