We specialize in Pad Printing Machines,Printing machine,Printing inks,Pad printing supplies,Screen Printing,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags.We are committed to providing printing solutions & printing machines for various customers. Pad printing,Printing Machine,Printing inks,Pad printing supplies,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags

Pad printing Components Used in process

 
PADS
 
Round Pads
 
 
INKS
 
Inks Inks
 
 
SCREEN PRINTING
 
 
 
 
ABOUT PADS

VARIOUS PADS USED FOR PRINTING

   
Standard Pad
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.
Standard Pad
 

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
Round Pointed Pad
The silicone oil plays a vital role for the surface tension. After approx. a year, however, it evaporated from the pad, the surface tension increases and the ink transfer is not as good.
A pad only transfers the ink at 100% if is it optimally adjusted. Usually a thin ink film stays back on the pad. By operating the machine at a slower pace or by blowing air on the pad the ink pad can be influenced.
Round Pointed Pad
 

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.

   
Pad Selection
   
The type and sizes of the print image or the form of the print object often requires a different pad form as the idea round form. Therefore a large range of different pad forms are available.
   
Pad selection according to pad form
   
The pad printer will base his selection of pad form on experience or through trials. Luckily more than 90% of all pad prints can be performed with a few different pads. The following compilation shows typical pads and their application. These selections of pads should serve as a rough orientation, they can never replace the own print trials.
   
Universal Round Pad
Universal round pad with conic print area for many applications
Universal Round Pad  
   
Round Pad
Round pad with round print area. Most suited for printing of round objects
Round Pad
 
   
Square Pad
Square pad for square print areas
Square Pad
 
   
Rectangular Pad
Rectangular pad for rectangular print images
Rectangular Pad
 
   
Saddle Pads
Saddle pad most suitable for individual words or small print images
Saddle Pads
 
   
Roof Top Pads
Roof top pads for small narrow print images
Roof Top Pads
 
   
According to pad hardness
   

Basically you can print better with a harder pad than with a softer one. A harder pad transfers the ink better, is more constant and vibrates less in fast machines. Therefore you should always print with the hardest possible pad.

Softer pads should be used upon the following criteria:

  • Large surfaces
  • uneven over a large area
  • Low machine power

By using a softer pad you can print a larger area with the same form than with a harder pad.In addition it is easer to overcome larger uneven surfaces with a softer pad.

However, it must be kept in mind that each pad can only withstand a certain pressure. If the pressure is too large, the pad starts to "flow" and the print is destroyed. For small uneven surfaces which are typical for example for miniature trains, you need to use a hard pad. By increasing the rubber pressure the impact can be improved.

Rule of Thumb

A rule of thumb for good print quality is: a higher shore hardness, i.e. a hard pad, a pad form which is a pointy as possibly and the largest volume.

 

For perfect results you should observe a couple of rules:

For fine lines and characters use a steeper pad, for large surfaces use a pad which is less steep

Compared to the print image,the pad must be large enough-if in doubt choose a larger one

Whenever possible should the starting point of a pad not be within the ink area.

Adjust the pad in such a way so that it can transfer the print image with the least possible pressure

Clean the pad only with adhesive film and in the beginning carefully with alcohol.

Store the pad properly so that it cannot be soiled or damaged

Always use inks which are made specifically for pad printing.

   
Special designs  
   
Special Design

Should you not be able to manage with a standard pad, you will need to use a custom-made product.

For example through a pad combination in which individual pads are mounted together on a board. You also can modify an existing pad form (for example by shortening it or by adding hollow spaces and then casting a new pad.

   
Stroage  
 

The print surfaces of the pad are very delicate. During transportation you must make sure that these surfaces are not damaged. Some manufacturers use a protective matter, other pack the pad in such a way that no dents or abrasion can form.

Ideally, new pads should be stored without a protective matter at an even temperature (18° C) in a dark room or carton. You must make sure that pad are not subjected to sunlight or heating.

   
Cleaning  
   

The pads must be cleaned very carefully. The brilliance of the print surface determines the print quality directly. This surface can be destroyed or the life cycle of a pad can be strongly reduced if the pads are not cleaned properly. a new pad will not transfer any ink if it has not been cleaned. It must be wiped down with a soft, lint-free cleaning cloth and the thinner which was used must be removed.

During breaks or after the end of a printing job the pad should be cleaned in a gentle ink solvent (for example alcohol). Strong ink solvents cause the pad to become brittle and prevent a good ink transfer. A pad may never be wiped down dry or with the palm of your hand. It would destroy its eraser-effect.

All these cleaning problems are eliminated when using a pad printing machine with automatic pad contact cleaning. You can program the pad cleaning process of these machines. A cleaning module with automatic feeder is mounted above the ink feeder system. If the pad needs to be cleaned after use, the ink feeder stop over the cliche. Instead of taking on ink, the pad is pressed on the module and starts cleaning itself. This method of cleaning is very safe for the pad. The operator does not have to handle thinner which in return means an environmentally safer work place.

A drastic reduction of scrap is also an additional benefit.

   
Pad Life  
   

The life of a pad can range from few objects to several hundred thousand prints. It very much depends on the state of the print object and the treatment of the pad.

Sharp edges of the print object or dirt particles, improper cleaning and storage can strongly reduce the life of a pad. If the pad treatment measures of this booklet are met, a pad can print between 20,000 to 500,000 prints, depending on the required print quality.

If you work with ceramic inks you can make no more than 20,000 to 25,000 prints. The grain sizes of ceramic inks limits pad life tremendously.

Pad printing machines with automatic pad cleaning are not dependent on the skills of the operator. As a rule pad life is increased manifold.

   
 
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We specialize in Pad Printing Machines,Printing machine,Printing inks,Pad printing supplies,Screen Printing,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags.We are committed to providing printing solutions & printing machines for various customers. Pad printing,Printing Machine,Printing inks,Pad printing supplies,Glass decoration,Pads Plates Cliches inks for pad printing,Print Solutions,Print Services,Laser engraving,RFID Tags
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