What is a pad printing machine ink cup magnets？

In pad printing machines, the ink cup serves as a vital component of the entire printing system, responsible for storing ink, scraping ink, and returning ink. A key factor supporting the stable operation of the ink cup and ensuring printing precision is a small part hidden at its base—the ink cup magnet. Below is an introduction to the primary functions, materials, and dimensions of the ink cup magnet.

The following picture shows circular magnets used for transfer printing on oil cups/oil cups, distributed in a circle, usually with a quantity of more than 10.

Ink cup magnet typically a powerful neodymium magnet installed at the bottom of a pad printing machine's ink cup. It adheres magnetically to the steel printing plate, ensuring tight contact between the ink cup and plate while providing sufficient pressure for ink scraping and sealing.

What is the primary function of the ink cup magnet?

The main purpose of the ink cup magnet is to create a stable magnetic attraction between the ink cup and the metal printing plate. This magnetic fixation ensures the ink cup remains steady and aligned during both ink transfer and return processes. It guarantees an even ink layer, prevents ink leakage and incomplete scraping, enables smoother ink cup movement, reduces mechanical wear, and enhances printing stability and image clarity.

Beyond fixation, the ink cup magnet also aids sealing to prevent ink evaporation and contamination, significantly improving print consistency.

What are the common materials and sizes for oil-filled magnets?

Due to specific magnetic force requirements, the primary material is neodymium iron boron. Common sizes include 10mm diameter circular magnets and cylindrical magnets such as 10x10mm and 10x8mm. For instance, a single 10x10mm cylindrical magnet can achieve a surface magnetic field strength exceeding 4400 Gauss.

The above covers the primary functions and dimensions of magnetic oil cups for pad printing machines. Our company offers high-force magnetic oil cups in various specifications ranging from Φ10mm to Φ20mm. For pricing inquiries, please feel free to contact us.

Relevant magnet selection;

15mm by 10mm circular neodymium magnets pull 4kg

Glass whiteboard cylindrical strong magnet 10mm dia x 12mm thic