Synrad Applications News

SYNRAD, INC. - http://www.synrad.com
Thursday, May 14, 2009
Issue 212

Applications at a glance


Marking Anodized Aluminum Labels
Cutting Automotive Headliners
Cutting Printed Polyester Film (PETF)


Marking Anodized Aluminum Labels


Cutting Automotive Headliners


Cutting Printed Polyester Film (PETF)


SYNRAD's sealed CO2 lasers are used in a variety of industrial processes including cutting, welding, drilling, and marking. This news brief showcases some of the interesting materials and products that are processed daily by Synrad's line of CO2 lasers and marking heads.


Marking Anodized Aluminum Labels

Marking anodized aluminum is a common, time-tested CO2 laser application. During the marking process, the pigment in the anodize coating is essentially "bleached" by the CO2 beam so the protective coating remains intact.

The goal of this application was to mark anodized aluminum label plates using 40 watts of power, while fully ablating the black anodize coating. The eight-digit serial number in the upper anodized rectangle was created using a filled TrueType® font at a Text Height value of 4.2 millimeters (0.165"). Next, a UCC-128 linear barcode, created at a Barcode Height of 5.1 mm (0.2"), was positioned in the lower rectangle. Because the barcode appears lighter than the surrounding background, the Barcode Inverted property was set to Yes. Finally, a human-readable text object, created using one of WinMark Pro's built-in stroke fonts, was placed below the 1D barcode.

   




Laser Marking Anodized Aluminum Labels

The serialized data in both black anodized rectangles was marked using 40 watts of power at a velocity of 2.5 inches per second in an overall cycle time of 23.8 seconds per label.

To eliminate the possibility of data entry or data transmission errors when multiple mark objects require the same information, WinMark Pro provides two Auto Text Type automation properties - From Another Object, and Assign From - that allow users to link, or assign, the text caption from one object (entered via a keyboard, serial port, or text file) to another object or objects in the mark file. These properties ensure that sets of data remain synchronized throughout the mark session.

To mark the label plates, we chose an FH Series marking head and a 125 mm focusing lens. This lens provides the smallest possible spot size (180 microns or 0.007") over a mark field large enough to place all three objects on the label. All objects were marked using 40 watts of power at a Velocity of 63.5 millimeters per second (2.5 inches/second) in a cycle time of 23.8 seconds per label. After marking was complete, the bar code was read and verified using a Microscan MS-Q Quadrus Handheld Imager.



Cutting Automotive Headliners

CO2 lasers continue to excel in automotive applications as manufacturers strive to improve vehicle quality and cost savings during manufacturing. Integrating a laser with an industrial robot or flatbed cutting table provides a consistent method to accurately cut part after part, and the laser's non-contact cutting method means there is no need to schedule down time for mechanical cutter adjustment or replacement.

The purpose of this application test was to demonstrate the cut speed and quality achieved while using a Firestar f-Series laser to cut automotive headliners. This particular semi-rigid headliner material is comprised of several layers of synthetic fibers, with a total thickness of 1.3 mm (0.050") bonded to a 1.4 mm (0.056") thick paperboard base for an overall thickness of 2.7 mm (0.106").

   


Laser Cutting Automotive Headliners

This 0.106" thick composite headliner material was cut using 400W of power at 14 meters per minute (550 in/min).

 

 

The cutting head on our flatbed XY table contains a 63.5 mm (2.5") positive meniscus lens that provides a 100-micron (0.004") spot with a 1.8 mm (0.07") depth of focus. During the cutting process, we delivered 4.1 bar (60 PSI) of clean, dry air coaxially with the beam for gas assist.

Our Firestar lasers achieved cut rates of 14 meters per minute (550 in/min) using 400 watts and speeds of 7 meters/minute (275 in/min) using 200 watts of power. In both cases, the synthetic fiber was cleanly cut while the paperboard base exhibits slight charring of the cut edge.


Cutting Printed Polyester Film (PETF)

One of the many uses for polyester is in the production of polyester film (PETF), a semi-crystalline material that is widely used in the printing and graphics arts industries, due to its durability and scuff resistance, as well as its ink anchorage and color definition properties. Polyester film is printed by any number of methods, including flexography, offset, silk-screen, and digital label presses. Polyester provides a high gloss and extremely sharp print definition, which makes it the perfect material for optical encoder discs where precisely printed light and dark regions within multiple tracks are key elements that allow the encoder to determine the absolute position of mechanical elements connected to its input.

   

Laser Cutting PETF

These optical encoder discs, printed on 15-mil polyester film, are precisely laser-trimmed to size using 60 watts of power at a speed of 22 inches per second.

In order to complete the manufacturing process, each encoder disc is cut or trimmed from a larger printed sheet. Fortunately, polyester film reacts as well to CO2 laser energy as it does to ink. For this application, we were asked to trim 15-mil (0.38 mm) thick polyester discs using 60 watts of power. Based on the sheet size and overall ease of integration, we chose to use a Firestar t-Series laser for power and an FH Series marking head for beam delivery. Equipped with a 125-mm High-Power focusing optic, the FH head can place a 180-micron (0.007") diameter beam anywhere within a maximum mark field of 80 mm x 99 mm (3.2" x 3.9") with a position accuracy of 0.02 mm (0.0007").

At a power level of 60 watts and a galvanometer speed of 558 millimeters per second (22 inches/sec), we cut both the inner disk (left) and outer disc (right) from the film sheet in an overall cycle time of 0.3 seconds. As shown in the photo, the polyester film exhibits an exceptionally clean, high-quality edge with no dross, discoloration, or vapor deposition present.


Browse Synrad's Applications Database

Search our online library for more applications of Synrad's sealed CO2 laser technology. Search by keyword, material, or process.
http://www.synrad.com/search_apps/Default.htm


FH Flyer / Fenix Flyer Technical Updates

Synrad Technical Updates keep you informed of recent developments related to FH Flyer Marking Head or Fenix Flyer Laser Marker products. Sign up to receive these bulletins automatically via email at http://www.synrad.com/FH_Flyer/flyersupport_subscribe.htm


Contact Us:

Please do not reply directly to this newsletter. E-mail questions or comments to synrad@synrad.com

Synrad, Inc.
4600 Campus Place
Mukilteo, WA 98275
Tel: 1-425-349-3500
Fax: 1-425-349-3667
E-mail: synrad@synrad.com


To unsubscribe, please click here.


Copyright ©2009 SYNRAD, Inc. All rights reserved.

SYNRAD and Synrad product names are trademarks or registered trademarks of SYNRAD, Inc. All other trademarks or registered trademarks are the property of their respective owners.