02.10.2014
Unlike traditional UV lamps, which limits on heat sensitive materials and an external fan system is needed.
This area light source offers industrial strength curing with a large illumination area for high process throughput, while ensuring uniform intensity from the center to the edge and enables printing on almost all kinds of substrates even on thin film, thin plastics, foam plastic (ceiling tile), paper, and leather. The use of UV-LED systems for the curing of UV inkjet inks continues to expand as equipment manufacturers bring this technology to a wide range of new equipment.
SGIA: UV-LED curing is seen as "standard equipment" on an increasing number of inkjet printers. Kuta: Without a doubt, the major driver for LED adoption is the cooler cure this technology offers to print integrators and printers. The solid state nature of UV-LEDs makes them inherently robust, although there are significant technical challenges that need to be overcome to ensure the maximum benefit is achieved from the LEDs.
Raymont: The main factors which are the key to UV-LED acceptance and use in inkjet printers are UV-LED's smaller equipment platform size, the ability for them to be placed very close to the print surface and the ability to turn on and off very quickly when compared to other UV sources. SGIA: Early in the implementation cycle of UV-LED curing technology, one of the challenges was to have the LED lamps generate enough energy to cure ink fully, which resulted in a process that was slower than using traditional UV lamps. Raymont: The suppliers of the building blocks - UV-LED chips and dies - have improved the "LEDs" supplied to companies that integrate them into the UV-LED sources used on inkjet printers. Purcell: Recent developments in the construction of the LED arrays, such as increasingly dense packing of smaller diodes and higher watt power, have increased curing effectiveness.
SGIA: For UV-LED to work effectively, the lamps and the ink system need to work symbiotically. Purcell: The formulation of UV-LED inks must be optimized with photoinitiators, which specifically absorb in the wavelength emitted by the UV-LED. Kuta: Through ongoing internal evaluation at our ink testing facility, we have observed a significant improvement in the curing efficiency of commercially available LED specific inks.
SGIA: Does UV-LED-adjusted ink cure equally as well as traditional UV-inkjet inks, or are there any challenges to adhesion, durability or media diversity? Purcell: One of the challenges is proper cure and this is true for traditional UV curing and UV-LED curing. Kuta: Historically we had seen issues with achieving surface cure and good ink adhesion thru our in-house ink curing studies. SGIA: Printing companies purchasing new equipment using UV-LED technology currently face a higher curing-system cost when compared to traditional UV lamp systems. In addition, the added versatility that cool curing UV-LEDs provide, from a print application perspective, expand the range of jobs that can be addressed on a single printer, offering print providers new opportunities for differentiation and profit. Purcell: The initial curing system investment is believed to be offset by lower maintenance costs, longevity of the LEDs and savings in energy consumption.
Kuta: Yes, it's our opinion that UV-LED will become the dominant curing technology in the UV digital print market by 2015. Bea Purcell, Nazdar's Market Segment Manager, has held various sales and technical positions in the membrane switch industry.
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CON-TROL-CURE® provides unique and innovative UV LED Curing Systems: the revolutionary HIGH POWER UV LED CONVEYOR SYSTEM produces intensities that are worlds apart from previous models. Air Motion Systems manufactures LED UV curing systems for polymerizing printing inks, coatings and adhesives, among other applications. Manaksia Industries Limited is presently one of the largest manufacturers of metal caps and closures in Asia.


Is inkjet ready for prime time, and what are the challenges faced in the adoption of the technology? What are the main factors driving this change, and what do you feel is the most compelling reason for equipment manufacturers to adopt this technology for their inkjet solutions?
This opens up new applications for print shops and expands the versatility of a printer platform. We strongly encourage printer manufacturers to be thorough in their vendor selection and qualification process. The area of cure for inkjet printers is relatively small compared to the area of cure for other print technologies (wide screen print) and this works in the favor of UV-LED. Since most printed media are plastic, heat coming off the traditional UV curing lamps to the surface of the substrate is a major factor in causing shrinkage and distortion. What specifically has changed in the past two years to increase the effectiveness of UV-LED lamps, making them viable at production speeds?
Integrators and suppliers of UV-LED sources have come up with unique and different ways to better package, harness, control, cool and direct the UV photons to the cure surface. Early print systems utilized low irradiance LED sources that compromised productivity, or integrated bulky water-cooled LED systems, which added a new level of complexity to the printer architecture and put flowing water around sensitive print head electronics. What are the specific challenges to ink development that have had to be addressed in order to make UV-LED a viable curing technology for the industry? Historically, we had seen issues with achieving surface cure and good ink adhesion through our in-house ink curing studies, particularly with thick ink layers, or with highly absorbing or scattering inks such as black and yellow. If so, what are these challenges and how are they being addressed in research and development? Partially this is attributable to ink formulation, but partly due to the peak irradiance levels that could be delivered by LED curing systems. Many companies feel that the more watts a UV-LED system has, the better it is, but there are no standards as to where the system is measured or whether the watt number being quoted is a theoretical or actual number. What are the reasons printing companies are accepting of UV-LED technology, and are they able to recoup the additional cost during the expected life of the machine? Cost of Ownership (COO) includes not only upfront acquisition costs, but also running and maintenance costs. We base this on our own technology and market roadmaps, and have validated it through direct discussions with leading printer manufacturers. The decision to go to inkjet printing - including UV-LED inkjet printing - needs to be based on a realistic economic evaluation versus emotion or new technology decision. He is responsible for developing and executing the company's UV strategy in the digital print market.
Purcell has a bachelor's degree in chemical engineering and a Master of Science in education. It becomes possible to print on heat sensitive substrates without shrinking or warping of the material. A good UV-LED system will last tens of thousands of hours, provide high levels of irradiance and dose for effective ink curing, tolerate high ambient operating conditions and the reality of today's print shop conditions. More companies are involved in UV-LED and that has resulted in different types of equipment.
The challenges associated with these approaches, in addition to a limited selection of LED specific inks, limited the adoption of LEDs into commercial printers.
Traditionally, shorter (UVC) wavelengths from arc and microwave UV sources have been associated with the surface cure properties (texture, feel, stain resistance) of the cured coating.


These curing issues were partially attributable to ink formulation, but also partly due to the peak irradiance levels that could be delivered by LED curing systems. Both have been improved to the point that UV-LED curing systems in digital print are now economically and technically viable - hence the increase in adoption. The biggest question is how the ink cures and responds to the UV source whether it is two watts or eight watts. The higher reliability of LED systems, lower energy costs and longer lifetime combine to create an improved COO relative to arc lamps. UV-LED curing systems contain no mercury, do not create ozone and reduce energy demand - all of which support the trend in the print industry toward sustainable technology.
Before joining Lumen Dynamics, he was a research scientist with the biomedical optical instrumentation firm CME Telemetrix. EIT provides electronic manufacturing and engineering services to medical, telecommunications, analytical, instrument and industrial process control customers. A very wide spectrum of materials can be quickly cured with this next-generation, extraordinarily small LED curing unit. The latter also has the ancillary benefit of improving printer reliability due to fewer head strikes. It should be easy to operate, and have simplified service requirements compared to arc lamps.
Will they all last and have the resources to bring products to market and support existing products? Over the past six months, high irradiance air-cooled UV-LED systems have become available, which allow for full cure of inks at market leading productivity levels. Changes that have allowed the inks to respond to the relatively narrow band UV-LED source as well as deliver the desired surface cure properties need to be made for acceptance of UV-LED by the industry. Printer manufacturers benefit as well since UV-LED systems are easy to integrate and do not require integrated shutters or high voltage igniters.
Will it have lower maintenance costs, reduced set up times and do these justify the initial higher cost investment of a UV-LED system? Each 108 watt LED array features a 12 inch wide curing path and can be integrated on a conveyor or stand alone as a retro-fit system. That said, UV-LEDs offer numerous other advantages leading to an overall improvement in the cost of ownership for the print shop and easier integration for the printer manufacturer. All of these capabilities are now available, both in air and water-cooled UV-LED solutions.
This has been made possible by technological advances in semiconductor packaging technology, which enables more efficient thermal management of high power UV-LED systems. Will the UV-LED system replace something that I have or be a new machine that will allow me to go after new types of work?
Available in several standard sizes, these systems are also very customizable to suit your unique needs. Air-cooled solutions seem to be preferred by printer and printer manufacturers, however, as they allow simplified printer architecture (no chiller or water tubing). Its flagship model is the LED-UV™ XP (Extendable Profile) Series, which offers the highest curing intensities and greatest working range available on the market today, among many other revolutionary advantages.




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Comments Uv led curing light tip

  1. NaRKo_BiZnES
    Fix (Liquid - Plastic Welding Tool) UV Light process; clean.
  2. bomba_qiz
    Second Fix is not a glue the product to apply a few streaks to only one.
  3. AHMET
    Than welding and they look type of glue made from glue Is Used To Attach Glass To Glass.
  4. seymur
    Steel equipment, and epoxies may need different field lamps that still need curing times.