Unit Cost Calculation Model and Batch Cost Sensitivity Analysis for Flexo Printing
This paper establishes a mathematical unit cost calculation model for flexo printing,analyzes cost sensitivity affected by order batch size,printing color number and substrate type,and provides order batch splitting suggestions to minimize unit printing cost.
The core unit cost formula of flexo printing is composed of average fixed cost per piece plus variable cost per printed product.Average fixed cost decreases continuously with the increase of order quantity due to amortization dilution,while variable cost per piece keeps relatively stable under the same process parameters.The intersection point of fixed cost dilution curve and variable cost stable line is the optimal economic production batch for flexo jobs.
Printing color number is the most sensitive factor affecting flexo unit cost.Each additional color printing unit will increase prepress plate cost,ink consumption cost and registration debugging waste cost simultaneously.Five-color flexo printing has 37% higher unit cost than three-color printing under the same substrate and order quantity conditions.
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Substrate type brings obvious variable cost difference.Thin film substrates need corona pretreatment equipment consumption and slower printing speed,raising unit cost by 9%.Thick corrugated board requires higher printing pressure and more ink consumption,with unit cost increased by 13%.Common paper substrates have the lowest matching process difficulty and the most stable unit production cost.
Cost sensitivity analysis of prepress debugging waste material.Short-run orders have extremely high debugging waste proportion,and debugging waste can account for up to 22% of total material consumption for orders below 3000 meters.With the order printing mileage exceeding 20000 meters,the proportion of debugging waste drops below 4%,and unit cost tends to be stable completely.
Automation level influence on labor cost proportion.Fully automatic servo flexo presses reduce on-site operator labor cost by 53% compared with semi-automatic models.Higher upfront equipment investment can be recovered within 14 months via saved labor cost and reduced debugging waste for long-term continuous production workshops.
Economic order batch decision guide based on cost sensitivity data:short-run orders less than 5000 meters are not suitable for flexo printing due to high fixed amortization cost;medium orders between 5000 and 20000 meters need automatic parameter storage function to cut repeated debugging cost;long-run orders over 20000 meters maximize
flexo printing cost advantage and achieve the lowest unit production cost.
