Piston coating machine

Sprimag's Piston Coating Machine

Applying low friction coatings to piston skirts was previously done using spray guns.  This process has some disadvantages including significant masking, time-consuming set-up, cleaning and excessive over-spray. These shortcomings inspired Sprimag to develop a screen printing technology especially for round components: the PiCo silkscreen-printing machine.

Silkscreen printing is an efficient method of coating with little paint loss and sharp borders. The screen serves as a mask which defines the print image. A squeegee pushes the ink through the screen as the screen moves slowly across the rotating part (see videos). The coating thickness is determined by the screen’s mesh size.  Part changeover is simplified via recipes on the main operator panel which automatically adjust the squeegee and screen strokes for each specific part diameter and length.

PiCo silkscreen-printing machine
  • Compact, robust design
  • Diameter of the parts: 53 –160 mm
  • Height of the parts: 45 – 170 mm
  • Mass of the parts: up to 9 Kg
  • Capacity:  up to 720 parts/hr

An essential advantage of the PiCo is the use of a distortion free template, especially for non-round components. The Pico automatically adjusts the range of the scraper to compensate for the deviations between the screen and the substrate while at the same time reducing the wear on the screen.

Due to the compact size, the Pico silkscreen-printing machine can be easily integrated into a production line.  As an authorized Fanuc integrator, we normally integrate our piston coating machine with robot load and unload.  Our simple recipe-based machine interface allows for quick part changeovers with no robot programming required by the operator, even for new parts.


Piston Coating Cycle

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Piston Coating Cycle