Karis’ UCoustic soundproof cabinets provide the benefits of  noise reduction and mobility. Rack mount servers, RAID systems and other components can now be used in environments where they could not before. Innovative Soundproof Quiet Rack Mount Cabinet Enclosure Solutions for IT Equipment and Server Noise Problems for Canada and the US markets. As the leading independent supplier of soundproof rack mount cabinet enclosures we make your life both easier and quieter! One of the benefits of photo chemically machining a shielding enclosure is the possibility of incorporating precisely etched bend score lines in the flat blank design to facilitate the final forming of the enclosure. Variety of enclosure designs including single piece enclosures, shields with removable covers and multi-piece enclosures that feature internal walls.
The cover locks to the base by through holes in the cover fitting over embossed dimples in the base. Electromagnetic interference (EMI) is an unwanted disruption in the communication of an electrical device caused by foreign electromagnetic waves.
When designing electronic devices, manufacturers must conform to regional and global regulations to prevent electromagnetic interference. Highly conductive epoxy coatings enable aluminum-like shielding levels at a fraction-of-the-weight of traditional enclosures. Electrical device manufacturers have traditionally used metallic enclosures to safeguard against EMI. In the quest for lighter construction materials, many manufacturers are switching to thermoplastics.
On the other hand, plastics are inherently electrically insulating, thereby offering negligible EMI protection. Electroless plating is an intensive, multi-step, chemical process that ultimately deposits a pure, thin metal coating onto the plastic. In addition to safety and environmental issues, electroless plating can suffer from limited adhesion, especially around exposed edges or corners or where stresses in the substrate may be high.
As an alternative to metallic enclosures and electroless plating, many manufacturers are using dense, conductive coatings that are sprayed onto the thermoplastic enclosure.
Another possibility for making thermoplastics EMI-proof is filling the thermoplastic material with conductive particles. Electronic manufacturers are seeking a conductive coating for thermoplastics that delivers the equivalent shielding performance of electroless plating without the safety, environmental, and cost issues inherent in the plating process. This efficient performance is especially significant for manufacturers who want to swap out their hazardous, electroless plating process with a coating that delivers at least 85 dB or higher at approximately the same thickness.
The distinctive base chemistry of the coatings allows the material to be adapted into several useful product forms including coatings, adhesives and films. The room-temperature stability or latent nature of the coating enables the base chemistry to be manipulated into the form of a liquid-dispensable adhesive, thus permitting it to be used as a traditional adhesive but with EMI shielding properties. In its film form, the base material can be sheeted into large pieces of film for sizeable applications. For repair procedures, the highly conductive epoxy coatings are available in a pressurized spray can. With highly-conductive epoxy coatings, manufacturers have a material that is predominantly a polymer that behaves similar to a metal, over a very broad range of frequencies. A recent study reveals radiation from solar events is unlikely to affect earth & the dose of radiation emitted during the events isn’t enough to harm people. Select Fabricator contracts include RF isolation tents, Mil-Spec packaging, custom RF isolation environments and off-the-shelf signal containment.


Isolation of RF signal emanation for governement agencies preventing information leakage from bugging attacks or electronic eavesdropping. Select-A-Shield RFI EMI shielding pouches are designed to isolate wireless devices from receiving or emitting signals.
A very specialized bag for the aerospace industry required numerous pouches, cavities, pockets, metal identification envelopes and a complex carry strap configuration. Select Fabricators can source Mil-Spec materials and convert them into specialized bags and containers.
Video and audio suites, production and creative departments, hospitals, libraries, call centers,  or any other locations that need to keep sound levels down will benefit from these innovative products.
Quiet server racks and soundproof computer cabinets virtually eliminate the perception of server noise or dampen it down to an acceptable level. Processing a wide variety of metals including steel, nickel-iron alloys with high permeabilities, brass, copper and nickel silvers assures that Lancaster Metals can produce an enclosure that will perform to your specific shielding requirement. Such score lines, while adding no cost or additional time to the fabrication of the flat blank, allow the enclosure to be precisely formed without the need for any additional form tooling -- thus avoiding the costs and delays associated with such tooling.
Such foreign waves or radiation induce electrical currents that interfere with the device’s normal operation. While this interruption can be benign, such as disturbing a cell phone conversation, it can have serious consequences for applications in the transportation industry, where, for example, just a brief interruption in the avionics system of an aircraft can be dangerous. Since almost any device that has some electronic component is susceptible to foreign radiation, manufacturers have developed several circuit-grounding and device-shielding methods. This photo shows the weight savings realized by converting from an aluminum enclosure (right) to a thermoplastic enclosure (left) that has been sprayed with the new epoxy coating. Metal enclosures, made from materials such as aluminum, steel, nickel, and nickel-iron alloys, deliver a relatively thick and exceptionally conductive boundary around the electronic device that reflects and absorbs disruptive signals. To overcome this problem, manufacturers often resort to using an electroless plating process or the plastics are coated with heavily-filled conductive coatings. While electroless plating does provide high shielding levels owing to its pure metallic coating, the process is environmentally unfriendly and time-consuming and, in turn, can be labor-intensive and expensive. In such situations, the metal coating may flake off, thereby leading to holes through which electromagnetic waves can penetrate. The coatings consist of a thermoplastic or thermosetting resin, such as polymethylmethacrylate and epoxy, respectively, that is highly loaded with metallic particles such as silver, copper, silver-copper, nickel, or hybrid combinations thereof.
While this approach eliminates the need for a conductive coating after the plastic is injection molded, the resultant enclosure is still far less conductive than achieved by either electroless plating or via a dense conductive coating. This form is particularly useful in the aerospace industry where it can be applied to large areas of an aircraft during assembly, offering protection from both EMI and lightning strikes. This simple delivery method allows the coating to be applied in field applications, without needing a spray gun, compressed air system or hose lines.  For example, if an enclosure or part gets scuffed or nicked in the field, the damaged section can be touched up by simply spraying it.
Industry-wide applications have proven that these coatings typically yield more than a 50% cost savings over electroless plating of plastics and other highly-filled, high-performance acrylic systems.
SELECT uses its design, collaboration and technical experience and works from specifications in order to produce custom products when necessary. Using Select-A-Shield™ portable enclosures, they were able to make adjustments on-site, on-time. Not only did the screen have to protect the unit from RF interference, the shield needed to be waterproof.
Prior to contacting Select, the customer was turned down by other custom manufacturing operations because the job was deemed too complex. These quiet server racks have acoustic soundproofing foam and are manufactured to reduce server noise, while still removing heat generated by your IT equipment.


In addition, Lancaster Metals offers a wide range of plating options including tin, tin-lead and silver to enhance the solderability of the base metal. However, although metallic enclosures do a good job of minimizing EMI, they are heavier than desired for many electronic applications. With metals, the enclosure’s shape must be stamped, a costly and time-consuming process which is not readily adaptable to intricate shapes. Specifically, plastics are first swollen by solvent, and then etched with strong acids such as sulphuric and chromic acids.
Moreover, these coatings overcome the tradeoff of shielding effectiveness and performance properties that are commonly seen with traditional high-density coatings. The spray handles just like paint and can be applied onto very complex thermoplastic shapes by using a high-volume, low-pressure (HVLP) spray gun. Lastly, depending on the mechanical requirements, the base material, whether in a spray, adhesive, or film form, can be formulated for rigid or flexible applications. If an external section of an aircraft becomes damaged causing part of the epoxy coating to be removed, the repair technician can spray the coating on top of the damaged or repaired section.
As manufacturers increasingly use lighter weight materials in their designs, highly-conductive coatings can provide efficient, economic EMI shielding that meets industry expectations. SELECT’s exacting process and attention to detail insures each project will meet the required performance characteristics.
Select’s sewing designers worked to provide miniature prototypes for testing before constructing the final large scale unit.
With ongoing review by the customer and Select’s quality, production and sewing teams, a design was approved that meet the detailed specifications. Thermoplastics, however, can be easily injection-molded into complex shapes at a high-throughput.
Following etching, the parts are rinsed, a catalyst is applied to the surface, and lastly, the metal, such as copper or nickel, is deposited onto the surface through a reduction reaction. The new coatings, based on a novel combination of epoxy resin, curative, and conductive fillers, are capable of self-assembling into a unique structure during curing. For precise control of thickness across a part, the coatings can be applied via robotic systems. This combination of lightweight design and production speed makes plastic enclosures less expensive to manufacture than metallic enclosures.
This process, which can entail additional rinsing steps, has come under scrutiny lately because it uses hazardous chemicals that pose harm to the operator and the environment. Due to increasing environmental regulations, shield designers are resorting to alternative coating techniques for plastics. Specifically, the self-assembling coatings offer 85+ dB of shielding at 25 micron (1 mil) thickness over a broad range of frequencies.
Because of its polymeric nature, the coatings can also achieve higher levels of adhesion and flexibility. In addition, they are resistant to high temperature, humidity, and salty environments to which electronic applications are often exposed.



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Comments

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