Printing Test

    The elements of monochrome pad printing machine to complete printing include pad printing plate, pad printing ink, pad printing rubber head, and pad printing fixture. The pad printing fixture is actually a positioning device, which fixes the product on the workbench according to the printing requirements to ensure that it does not move during the printing process; the pad printing ink should be suitable for the material of the product, such as plastic, glass, metal, The color of pad printing ink should also be the same as the color of the printing design; the pad printing plate is to etch the printed graphics on the steel plate or resin plate; the pad printing rubber head is an important carrier to complete the ink transfer, it is made of silicone rubber vulcanization, different pictures The printing plate of the text needs pad printing pads of different shapes and hardness. Monochrome pad printing machines generally only need one fixture, one printing plate, one color ink and one pad printing head.

      Monochrome rotary pad printing machine is the most popular pad printing machine in the market at present. Its degree of automation is greatly improved compared with monochrome pad printing machine. Compared with monochrome pad printing machine, its notable feature is that the Instead of a rotating turntable, it can clamp 4-10 products for continuous pad printing. Therefore, it needs more fixtures to fix each product. The elements to complete printing include pad printing plates, pad printing inks, and pad printing pads. , pad printing fixture. The pad printing fixture is actually a positioning device, which fixes the product on the workbench according to the printing requirements to ensure that it does not move during the printing process; the pad printing ink should be suitable for the material of the product, such as plastic, glass, metal, and pad printing ink. The color should also be the same as the color of the printing design; the pad printing plate is to etch the printed graphics on the steel plate or resin plate; the pad printing rubber head is an important carrier to complete the ink transfer, it is made of silicone rubber vulcanization, different pictures The printing plate of the text needs pad printing pads of different shapes and hardness. A monochrome rotary pad printer generally needs 4 to 10 fixtures, a printing plate, a color ink and a pad printing head.

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Pad Printer Printing Test Trouble-shooting 1-2
                                              
1   Graphic fuzzy, poor edge definition
.
Possible causes
Trouble shooting
Rubber pad too soft
Replace more harder rubber pad.
The shapeof pad is unsuited
Replace Matched rubber pad
Depth of Forme too deep
Remake pad plate with shallow depth
Incorrect Film screening
Output film with another screening parameter
Ink film too thick.
Adding some thiner to ink
Drying speed of ink too slow
Adding fast-drying thiner.
Printing stock is polluted.
Clean the surface..
Corase ourside of products.
Replace harder rubber pad
Rubber pad slide
Replace fixture and aviod pad sliding
Fixture stabilty not well
Remake fixture, reduce printing speed.
 
2         Poor ink Adhesion
 
Possible causes
Trouble shooting
Silicon oil remains of rubber pad
Clean the rubber pad with Solvent
Pad forme Depth too deep
Remake pad forme
Ink is not matched
Replace another type ink
Use bi-Component ink
Replace Bi-component ink
Incorrect Hardner percent
Please Precision addng hardner
Dirty surface of product
Clean the surface with Solvent
Need surface Treatment
Take flame treatment or Chemical treatment
Processing time is unsuited
Printing after treating soon
Insufficiency Post-curing
With IR dying or UV curing.

Pad samples show

Pad Printer Printing Test Trouble-shooting 3-4
   3. Pinhole  
Possible causes
Trouble shooting
Impairment surface of rubber pad
Replace rubber pad
Too Flat of rubber pad
Install more sharper rubber pad
Rubber pad too soft
Replace Harder rubber pad
Defect of pad forme
Remake pad plate
Ink too dense
Adding much more thinner.
Product surface too coarse
Choose more harder rubber pad
Dust on product
Clean the surface of object
Silicon Oil enter into ink
Replace new ink

4         Colour cross when miti-printing
Is a high-speed multi-color pad printing after printing the ink will stick before starting a phenomenon, this situation occurred in the substrate surface difficult to ink and solvent in case of infiltration of a large area printing. When the ink drying fast enough, and the shuttle table and the wheel table between the two stations to match the speed of change often occurs, usually rely on two sticky ink imprint of a pattern to solve this problem
 
Possible causes
Trouble shooting
Occur Pore and Ageing of rubber pad
Replace new rubber pad
The depth of pad forme too deep
Remake pad forme
Halftone percent and screen density incorrect
Renew output film with new halftome percent and screen density.
Excessive thinner
Adding ink
Drying speed too slow
Adding fast-drying thinner. Drying ink with Blowing-air.
Product Too smooth
Drying with cool wind and hot air between two times printing.
Dust on surface of product.
Clean surface with cloth

           Among multi-color pad printers, shuttle type pad printers and turntable pad printers are more common, while shuttle type pad printers have the highest precision. The workbench of the shuttle pad printing machine has an accessory similar to a shuttle block, which will drive the product and the fixture to move back and forth in different printing positions, and complete multi-color pad printing in sequence. The important feature of the multi-color pad printing machine is that it has multiple sets of colors and pad printing systems: Fixtures: The shuttle-type pad printing machine has only one fixture just like the single-color pad printing machine, but the fixture of the multi-color pad printing machine will move back and forth; The four-color shuttle pad printing machine has four sets of ink supply systems, which add four different colors of ink respectively. The four ink supply systems are respectively equipped with four pad printing plates, and each pad printing plate is supplied with ink by a separate oil cup or oil pan. , and the etching sequence of the four pad printing plates should be made according to the original manuscript provided by the user; the four-color shuttle pad printing machine has four pad printing pads installed on the front ends of different steel plates respectively, and the shapes of the pad printing pads can be the same or can be different.