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Various Shapes of Pad Printing Silicone Print Head, 1.Shore hardness between 0-35, 2.Easy get and take off ink, 3.Long life - details see: https://www.machineto.com/various-shapes-of-pad-printing-silicone-print-head-10073321

Various Shapes of Pad Printing Silicone Print Head

In addition to the cliche the pad is an important factor for faultless print. A pad is made of a selected mixture of silicone and silicone oil. The silicone oil is added to the silicone mass depending on the desired degree of hardness. In order to differentiate between the various hardness classes, the pads are colored with silicone color.

Only these silicone pads made today make pad print possible. The deep surface tension of the silicone, precisely on the border between ink up-take and ink rejection, depending on the degree of dryness of the ink, allows the excellent color transter. A silicone pad should meet the following specifications:

• high mechanical resistance
• good deflection of static charges
• stabile surface tension
• brilliant surface

Selecting the pad shape depends on the size and type of the print image and the form of the print object. In this way a flat pad might not transfer enough ink. Ink hole would come to be. A flat pad has also embedded air and therefore places with any ink contact. The ideal pad form for even surfaces is round.

It is interesting to know that a "roll angle" of a pad is independent of its form on the print surface is almost always nearly a straight line. The curve form, steep or not so steep, influences only the angle of this straight line.

For smooth printing the roll angle is usually between 20 and 50°

The tip of the pad is of outmost importance. This is a difficult zone,especially for full surface prints without grids. If you cannot move the tip to an ink-free surface, a pad with a medium roll angle and a pointy tip should be used. For a pad which is too flat, the roll angle would be too small. Hole would arise. for a pad which is too flat, the roll angle would be too small. Hole would arise. For a pad which is too point, the print at the tip would be too big. This print would displace th ink in a full surface print. Irregular ink application would be the result.

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