How to match the opening and box height? The opening direction and box height of flip covers, drawers, and floor covers should match: the path for placing and removing contents should be smooth. To confirm cooperation, drawing a diagram or creating a white sample is the most intuitive.
How to measure? Use a caliper or steel ruler to measure the opening and bottom (the box wall may have a slope): take the average of three positions and measure one as the standard; The outer diameter of the hard box should include the thickness of the edge wrapping. The measurement standards are based on the principle of ‘same ruler, same position’.
How much tolerance should be left? Cardboard has thickness tolerance and shrinkage during molding: there should be a gap (about 1-2mm) between the top and bottom of the top and bottom covers, otherwise it cannot be covered or is too loose; The size of the tolerance follows the box shape and material. The tolerance reservation shall be based on the principle of “being able to cover and not shaking”.
The size of the box is a detail that is easily overlooked: if there is a difference of a few millimeters between the inner and outer diameters, the contents may not fit properly. The caliber of the size is incorrect, causing confusion in quotation, sampling, and acceptance. This article explains the measurement of the size of the packaging box and aligns it before placing an order for customized customers.
Inner diameter or outer diameter? The inner diameter (available space inside the box) determines whether the contents can fit, while the outer diameter (size outside the box) determines the outer box and transportation: when placing an order, it is necessary to specify whether it is the inner or outer diameter, and the difference between the two diameters should be the thickness of the cardboard. Confirm the caliber and align it with the manufacturer first.
How is the thickness calculated? The thickness of cardboard (gray board, cardboard, corrugated) affects the difference in inner and outer diameters: the inner diameter of the top and bottom covers should be calculated based on the content and cushioning, and the outer diameter should be calculated based on the inner diameter plus double the thickness of the board. To calculate the thickness, first confirm the plate thickness before determining the size.
Size is the “constitution” of packaging: the inner diameter tube can fit, the outer diameter tube can fit in the cabinet, and the tolerance tube can be opened and closed – the measured diameter and tolerance are fixed first, and then there is less rework.
