Services  Screen Printing

Screen Printing

General Facts

At the Weidling GmbH, the screen printing method is used for manufacturing signs and labels as well as for the print on shaped objects consisting primarily of synthetics and metal. The complete production of labels is carried out, including material, print and the final processing down to the finished front foil, whereas usually ready-made parts are marked in the screen printing of shaped objects.

Procedure

Screen printing is a print through method. First, the screen printing form (usually polyester) is clamped into a frame and coated with a photosensitive emulsion. Then, the form is exposed and subsequently washed, leaving only the exposed parts water-soluble. After the installation of the screen printing machine, colour is filled into the sieve. During the printing process, the rubber squeegee presses the colour through the open parts of the template onto the form, leaving the surface of the material marked.

Advantages

The screen printing method distinguishes itself clearly from other printing techniques by a number of characteristics. One of them is the high application of colour, resulting in an enormous covering power, which other printing methods do not have. Moreover, concerning the possibilities of printing on even surfaces and on almost all kinds of material, the standard is set by screen printing. In the area of special applications, as for example the printing on cylindrical objects or the application of special varnishes and resists, the possibilities are virtually unlimited, due to the wide range of almost one dozen screen printing machines.

Materials

The materials used here are primarily inflexible and shaped semi-finished products consisting of plastics or metal, but also textile fabrics and special papers. In the industrial production of front foil, mainly polycarbonates, polyester and PVC of a material thickness of 0.05 to 2.0 mm are used. The sheet size differs according to the supplier and ranges from 500 to 700 mm in breadth and from 900 to 1200 mm in length. The manufacturing size in the production of labels is usually smaller.

  • polycarbonate (175, 250, 375, 500 μm)
  • polyester (150, 200 μm)
  • flexible PVC film (55, 70, 75 μm)
  • rigid PVC
  • glass
  • acrylic glass
  • polystyrene
  • metal
  • cardboard
  • textile fabrics
  • composite material
  • foam sheets
  • solid sheets
  • special materials

Range of Applications

Screen printed products are present in every aspect of daily life. In the industrial sector, screen printing can be found primarily in the production of front foil for the construction of machines and tools as well as in the direct printing of shaped injection parts made from tin or plastic. Furthermore, front panels, keyboard foils, rating plates, approval marks, stickers, labels, signs, textiles and advertising media can be printed. Halftone printing and the printing of four-colour set motives are also possible.

In the area of foils, subsequent processing which follows the print include methods such as laminating (glue and foils), die cutting, cutting, slitting, milling, plotting, creasing, blocking, drilling, pressing, laser cutting, laser marking, gluing and converting, all of which are feasible at the Weidling GmbH.

Machinery

  • screen printing three-quarter automatic; type PPG max. size 600x800 mm
  • screen printing semi-automatic; type 710 max. size 750x1050 mm
  • screen printing semi-automatic; type PS max. size 500x700 mm (2 items)
  • semi-automatic for flat printing and for printing on cylindrical objetcs,
    type PAB45 max. size 300x450 mm / d= 144 mm (2 items)
  • screen printing semi-automatic for flat printing and for printing on cylindrical objetcs; type SYP6A max. size 650x450 mm
  • different hand printing tables with vacuum max. size
  • heat-drying channel; type M9
  • UV-drying channel; type UT1052UV
  • vacuum exposer; type KÜHN
  • different drying furnaces for shaped objects

Links

Screen Printer´s Guild
FESPA
SIP magazine