First of all, choose a printer model suitable for small paperboard printing. Generally speaking, 480 printing machine can adapt to smaller cardboard, but it is more suitable for printing larger cardboard. In order to solve the problem of small cardboard printing, the following points can be considered:

1. Select the appropriate paperboard thickness. When choosing cardboard, try to choose thinner cardboard. This can reduce the pressure of the printing press on the cardboard, so that it is easier to pass through the small cardboard.

2. Adjust the printing plate pressure of the printing machine. The printing plate pressure of printing machine will affect the printing quality and the pressure of paperboard. If the printing plate pressure is too high, it will increase the pressure of the printing machine on the small cardboard, resulting in poor printing and even damage to the cardboard. Therefore, it is necessary to adjust the printing plate pressure according to the thickness of paperboard and printing requirements.

3. Adjust the conveying speed of the printing machine. Too fast conveying speed will also increase the pressure of the printing press on the small cardboard, so it is necessary to slow down the conveying speed appropriately to avoid causing excessive pressure on the small cardboard.

4. Use appropriate printing consumables. It is also important to choose the appropriate printing consumables. For example, choosing suitable printing ink can reduce the corrosion and damage to cardboard, thus better protecting cardboard.

To sum up, in order to make the 480 printing machine smaller than the cardboard, it is necessary to select the appropriate cardboard thickness, adjust the printing plate pressure and conveying speed, and use the appropriate printing consumables.