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Technology

Pad printing machine

Author:Ivan Zhang

 

Machine Knowleage  
 
        
Pad Printer

     Used to print small area and complex surface of industrial products. It is consist of working table, pad combination, ink supply system, operation controlling system and machine body as well.

Structure 

    (1) Working Table

      Install fixture and substrates. There are three kinds of working table: base, shuttle, and conveyer. Base working table is one simple working table to install conveyer and shuttle. Shuttle working table and conveyer working table installed on multicolor pad printer. One product to be installed and printed on shuttle pad printer and more products to be installed and printed on conveyer pad printer, but shuttle pad printer printing precision is higher the conveyer pad printer.

    (2)Pad Combination

        Install pad to pick up ink from pad plate and transfer onto the substrates. The pression of pad adjusted by the slide switching beside pad printer. When starting pad printer, pad combination will move from plate above to substrate above. Most of pad combination press down controlled by one cylinder jar, in order to print small area on big dimension objects, Independent press by diffrent cylinder jar will reach the result, this is independent-press muti-colour pad printer

    (3)Ink Supply System

       There are two kinds of ink supply: one is opened ink tray, the other is sealed cup. Ink and thinner covered in sealed cup to provide and avoid harmful solvent volatilization to protect environment clean, meantime ink saved because of small volatilization.

   (4)Operation Controlling System

         Most of pad printer controlled by micro-computer built in to make machine stability and easy to operate. When testing, only press simple action key and when starting automatic key to begin printing will be helpful to operate pad printer.

 Main Factors 

      (1)Pad Plate

       Three kinds of pad plate used by pad printer: thick steel plate, thin steel plate, nylon resin plate.

       (2) Pad Ink

       Choosing solvent screen ink, UV pad ink and solvent pad ink according to products substrates and having a test before printing.

       (3)Rubber Pad

        Ink picked up from plate and printed by soft rubber pad. Choosing pad according to substrates and printing precision, more harder pad to get more precision printing quality.

       (4)Fixture

        It is important to make fixture according to products. Regular products need the fixture made by lathe or CNC. Complex products need the fixture made by polyester resin.

Types 

        1. Manual controlling, Electron controlling, Compression air controlling pad printer to be sorted according to action supply. Most of pad printer in china market is controlled by compression air.

        2. Sealed cup pad printer, opened ink tray pad printer to be sorted according to different ink supply system. Sealed cup pad printer have more excellence than opened ink tray pad printer such as ink viscidity, ink dosage and clean environment.

        3. One colour, two colours, four colours, six colours pad printer to be sorted according to max printing colour numbers. One colour pad printer print one colour one time;two colours pad printer print two colours in one products one time.in order to improve multicolor pad printer purpose, one colour to be printed one time is ok too.

       4. Shuttle working table pad printer and conveyer working table pad printer to be sorted according to different working table installed. Shuttle working table pad printer install one product to print and get multicolor. Printing more precision than conveyer pad printer. Conveyer pad printer install 10-20 products to print and get more higher production than shuttle pad printer.

       5. Flat pad printer and cylinder pad printer to be sorted according to products can be printed. Cylinder pad printer updated on one colour pad printer. When its pad press down on the product and keep contact state for some time, shuttle working installed move and make cylinder product move round. Cylinder pad printer can print some simple round products such as handle, golf ball.