If the object you’re blowing off is flat, the laminar air flow from a Super Air Knife is ideal. They come in lengths from 3 inches to 9 feet long.
EXAIR often differentiates between laminar and turbulent flow in relation to our blow-off products. To clarify, laminar airflow is notably more efficient in blow-off applications, as it reduces pressure drops, enhances product displacement, and minimizes noise levels when compared to turbulent airflow. Understanding these distinctions is essential for optimizing performance in various applications.
Laminar flow describes a type of airflow where the velocity and direction remain uniform throughout a designated volume of air. This phenomenon results in air movement that occurs in straight lines, aligning parallel to any solid surfaces present in the area.
Laminar airflow is effective in reducing turbulence. However, the introduction of devices or materials on surfaces can unintentionally create swirls within the workspace. This chaotic turbulent flow can disrupt tasks that require a dust-free environment, leading to potential contamination. Furthermore, obstructions such as items left inside enclosures can exacerbate this issue.
The Super Air Knife by EXAIR serves as a prime example of a product that delivers laminar airflow. This cutting-edge tool offers an efficient solution for tasks such as cleaning, drying, or cooling various components, webs, or conveyors. It produces a steady sheet of laminar airflow that applies a consistent force along its entire length, ensuring optimal performance for a wide range of applications.
Turbulent airflow is characterized by its unpredictable and chaotic fluid dynamics, standing in stark contrast to laminar flow, where fluids move in smooth, parallel layers. In turbulent conditions, the fluid’s speed and direction are in constant flux, leading to the development of eddies and swirls within the flow.
If you have questions about laminar or turbulent airflow, please do not hesitate to reach out.
Manufacturers in semiconductor assembly and PCB production face strict cleanliness, throughput, and thermal-control requirements. EXAIRs compressed-air products, specifically our Air Knives and Vortex Tubes, and air amplifiers are proven, compact, and energy-efficient tools for precise blow-off, controlled cooling and heating for spot thermal conditioning and fume extraction. This Blog explains how EXAIR Super Air Knives and Vortex Tubes and Air Amplifiers address three common production needs:
Drying and particulate removal during lead frame processing with air knives.
Localized cooling/heating for functional PCB testing using Vortex Tubes.
Fume extraction during etching, cleaning and plating processes
I’ll cover technical fit, typical performance characteristics, and measurement/ROI considerations so engineers and plant managers can evaluate and implement these solutions.
Intellistat Ion Air Nozzle in clean room, cleaning microchip parts before installation.
Super Air Knife and Success in the semiconductor lead frame manufacturing process.
Typical use cases
Removing rinse water or flux residues after cleaning
Blowing off foreign matter, over spray, or machining debris prior to plating or die bonding.
Drying prior to molding or coating operations.
Static-assisted blow-off when combined with static eliminating product for electrostatically attracted particles.
Uniform Laminar Sheet of air: delivers consistent, even blow-off across the width of a lead frame, reducing localized hot spots or mechanical damage.
Adjustable force and flow: adjusting air pressure and shim size allow you to control force and volume so fragile wires or plated surfaces aren’t damaged.
Entrainment & Efficiency: The knives are engineered so they entrain ambient air, increasing total developed flow and reducing compressed-air consumption compared to open pipes.
Vortex Tubes for functional PCB testing / burn-in and thermal cycling
During in-line or bench functional testing, specific components or integrated circuits may overheat or require temperature conditioning to verify performance at the full range of the rated temperature specifications. Vortex Tubes give fast, localized cooling (or heating) without coolant loops, chillers, or plumbing intricacy. Subjecting devices to burn-in and thermal cycling stress helps products enter the field with confidence there will not be any preventable failures. Normally, environmental chambers are used for burn-in processes, but vortex tubes can help facilitate localized thermal ramps, corner stressing, or temporary additional cooling/heating when size, cost or availability of a full environmental chamber isn’t feasible.
Instant cold/hot air from regular compressed air: no refrigeration system or refrigeration cycle; instantaneous on/off.
No moving parts: high reliability and low maintenance for test fixtures.
Local spot conditioning: focus cooling on integrated circuits or other small areas without cooling the entire board or fixture.
Adjustable cold fraction: Vortex tubes can be tuned via the control valve to trade flow vs. temperature drop to meet testing conditions.
Cooling or Heating with the Vortex Tube
Air Amplifiers for fume extraction and partial heat control during etching, cleaning and plating processes.
In semiconductor lead frame manufacturing, maintaining clean, particle-free environments is essential to ensure consistent product quality and process reliability. Processes such as flux cleaning, plating, molding, and soldering generate vapors, fumes, and fine particulates that can contaminate delicate components or compromise yields. EXAIR’s Super Air Amplifier provides an efficient, quiet, and maintenance-free solution for capturing and removing fumes, vapors, and airborne contaminants from sensitive production areas.
Compressed-air energy reduction (compared to previous blow-offs) = kW savings (U.S. Department of Energy offers a benchmark of $0.25 per 1,000 SCF).
Tangible benefits: throughput improvement, energy savings, reduced capital cost (vs. chillers/chambers), lower maintenance and smaller footprint.
Conclusion
EXAIR Super Air Knives, Vortex Tubes and air amplifiers are compact, reliable, and flexible products that can improve cleanliness, thermal testing, and throughput in semiconductor processes.
Select a process you think could be helped with an air knife, Vortex Tube or an air amplifier and take advantage of our 30-day money-back guarantee.
Validate throughput and quality improvements and calculate ROI.
Rollout with appropriate controls, filtration, and operator training.
If you think any of our products can help you in your process, please reach out. We have a team of application engineers here M-F to answer your questions!
I haven’t done a spotlight in a while, so I figured it was time. In these, I pull from the dozens of phone calls or emails and walk you through how we on the Application Engineering team select a product for a specific application!
In this week’s spotlight, we focus on a common application we see here at EXAIR. Customers have a product that is too wet, and they need to reduce the excess liquid in or on their product.
For this, the customer makes candied cranberries. As they processed down the line, the excess liquid was creating a large mess, and they were spending too much time cleaning. And on top of that, the liquid is valuable to the customer, so the more they can reclaim and sell, the more profit they are making. Currently, the cranberries are moving on a 22″ slotted stainless steel belt. They were just letting the liquid fall off as they moved down the belt and that wasn’t working.
We had a conversation about the Super Air Knives and their ability to provide a forceful blast of air that was adjustable. We settled on a quote for a 22″ custom length 316 stainless steel super air knife to provide the force to get as much excess liquid off the cranberries as possible without blowing them all over the place. This will allow them to have less mess upstream and collect more of the liquid to be sold. Both will increase productivity and profits.
Why custom length? EXAIR produces our products right here in Cincinnati, Ohio, while we carry all of our stock knives on the shelf ready to ship the same day with an order by 2PM EST. The width of this belt was 4″ larger than our closest stock size. But we custom-make knives all the time, so we quoted just that.
Why 316 ST.ST? This is a food operation that requires wash-downs with fairly caustic chemicals. The 316 ST.ST will hold up to those products.
Why the Super Air Knife? Well, the Super Air Knife is the most efficient, quietest knife we offer. The Standard and Full flow are great options for some applications, but the Super Air Knife is the king of them all when it comes to the most efficient way to produce the laminar flow our air knives offer.
With lengths from 3” to 108” and (4) four different materials all available from stock, EXAIR has the right Super Air Knife for your application. In addition to shipping from stock, it’ll also come with our unconditional 30-day guarantee. Test one out for yourself to see just how effective the Super Air Knife is in a wide variety of cooling, cleaning, or drying applications.
EXAIR Super Air Knives are the most efficient compressed air knife on the market. Please reach out if you have an application we can help with!
EXAIR frequently distinguishes between laminar and turbulent flow when addressing our blow-off products. I will succinctly explain the differences between these two types of airflow, with the aim of enhancing our collective understanding. In any blow-off application, laminar airflow proves to be significantly more efficient in minimizing pressure drops, effectively displacing products, and lowering noise levels compared to turbulent airflow.
Laminar flow refers to a type of airflow characterized by a consistent velocity and direction throughout the entire volume of air in a specified area. Essentially, this means that the air movement near a solid surface occurs in straight lines that run parallel to that surface.
Laminar airflow is effective in minimizing turbulence; however, the presence of devices or materials on the surface can inadvertently generate swirls within the workspace. Turbulent flow is inherently chaotic and can interfere with tasks that necessitate a dust-free environment, potentially resulting in contamination. Additionally, obstructions such as items left within enclosures can contribute to this undesirable situation.
An excellent illustration of an EXAIR product that provides laminar airflow is the Super Air Knife. This innovative tool presents a highly efficient method for cleaning, drying, or cooling components, webs, or conveyors. It generates a consistent sheet of laminar airflow that exerts a uniform force throughout its entire length, ensuring effective performance across all applications.
Turbulent airflow is defined by its chaotic and irregular fluid dynamics, contrasting sharply with laminar flow, where fluids glide in orderly, parallel layers. In turbulent conditions, both the speed and direction of the fluid fluctuate continuously, resulting in the formation of eddies and swirls throughout the flow.
If you have questions about laminar or turbulent airflow, please do not hesitate to reach out.
