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Lauren Rowles, GMN
By Lauren Rowles | Dec 20, 2018
GMN's holiday calendar 2019

As part of our yearly tradition, GMN has produced another custom calendar for the upcoming year. Apart from the functional value offered in helping to track the months and days of the year, these calendars also serve as a fun way to show off some of GMN’s decorative capabilities. In collaboration with our Seattle, WA Division, this year’s calendars were created at GMN’s Monroe, NC Division.

This year, we decided to make some exciting modifications to our calendar design, while still maintaining some of the same design elements as in previous years.

On the top strip of the calendar, there is an overlap spin pattern. This finish has been included on some calendars in years past, however, this year we enhanced the spin finish by taking the spin and dragging it along the metal surface, creating a dynamic look that reflects light in an interesting way. While this capability may seem common, the challenge that was posed by this application was achieving the drag spin at an angle and selectively. In order to contain the drag spin finish to only the top area, the process required laying down a resist layer over the desired area before the drag spin was applied. This resist layer protects the bright and other areas of the metal on which we didn’t want the spin to be applied. However, the resist ink can be difficult to work with at times, as it needs to be strong enough to withstand the drag spin, but gentle enough so that it can be removed after the spin is applied.

In addition, to complement and enrich the movement of the drag spin finish, a carbon fiber design was printed on the background of the calendar. Achieving the right balance of color was critical for printing this pattern because the color needed to have enough contrast to be visible but also be light enough to allow for the aluminum material to show through. Lithographic printing was used to print the months of the year onto the metal and create the halftone gradient pattern that is featured. Lastly, the GMN and logo and the year were embossed to add extra dimension and value to the calendar overall.

The entire GMN team is proud of the final product and is excited for it to take us into the new year!

Rich Smylie, GMN
By Richard Smylie | Dec 18, 2018
Pad printing at GMN

Pad printing is an offset printing process where ink is transferred from a cliché to the required component via a pad. Bringing together a blend of consistency, repeatability, and durability, pad printing can help you achieve intricate patterns and designs. While most decorative techniques such as screen and lithographic printing require a flat surface, pad printing is one of the very few processes that is well suited for decorating gently curved, irregular, textured, and/or cylindrical surfaces. Predominantly seen in the automotive, electronics, appliance, personal care, and medical industries, pad printing is often chosen for applications that will endure significant handling and need to withstand the test of time.

Our latest video was created to not only equip you with the essentials of pad printing, but also to walk you through the step-by-step process. First, the artwork is etched onto the cliché (flat plate), and ink is deposited into the etched recess. Next, a silicone pad picks up the inked image and descends onto the part to transfer a clean, crisp, and lasting image. Then, the pad is pressed on a polyester film to remove any excess ink. Comprising of a low-tack pressure-sensitive adhesive, the polyester film removes any residual ink from the pad prior to the next printing cycle.

From standard to programmable multi-axis printers, this video offers a glimpse into the different pad printing presses utilized at GMN. Armed with a rotating fixture, the programmable multi-axis printer is capable of numerous hits in multiple color combinations on different axes, all in a single set-up. This capability eliminates the need to transfer the part manually from one station to the other, resulting in significant time and cost savings.

Pad printing is compatible with a broad range of substrates including stainless steel, polycarbonate, polyethylene terephthalate (PET), glass, polyvinyl chloride (PVC), acrylic, and acrylonitrile butadiene styrene (ABS). Very few plastic materials such as low (LDPE) and high-density polyethylene (HDPE), and polypropylene aren’t cohesive with pad printing inks and require a pre-treatment to ensure good adhesion.

For every project, custom fixtures are designed and built to register the component to the pad printing head. The alignment of the ink pad with respect to the size and geometry of the part is specifically engineered to ensure exact registration. As seen with the Nissan badge in the video, the pliability of the silicone pad allows for printing with extreme precision, preventing the ink from coming in contact on the inside walls of the recessed letters. Maintaining the viscosity of the ink is extremely crucial to ensure the ink deposition accuracy and consistency. While the ink needs to be fluid enough to deposit on the substrate, it should not bleed out of the impression area. Thinners and adhesion promoters can be added to inks to achieve the desired viscosity level. Most of the inks used for pad printing at GMN are air-dried and are usually cured in conveyor ovens. Several other factors including the shape, material and durometer of the pad, location and color of the etched artwork, and tilt of the ink pad, are critical to the success of any project.

To see the pad printing process in action, watch our video here.