EMI/RFI Shielded Rigid Frame Gasket

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EMI/RFI Shielded Rigid Frame Gasket

EMI/RFI knitted wire gasketing has been the standard shielding product since its first use in 1944. Since that time, the product has been refined and new knit wire products have been introduced to the present state of the art products.

Rigid Mount Frame EMI/RFI Gaskets consist of an aluminum extrusion with a specially designed jaw. When closed, the jaw crimps the fin of the knit wire EMI gasket to form a rigid construction with the EMI gasket held firmly in place. This extrusion, when fabricated into a frame with the corners of aluminum extrusion mitered and heliarc welded, provided a gasket assembly that can be installed with flat-head screws. This design makes retrofitting int the field a relatively easy task and at the same time provides a positive stop for controlled compression of the EMI Gasket.

Rigid frame gasket is especially recommended for large cabinet doors or access panels that are frequently opened. Knit wire gasketing acts like thousands of tiny spring members which are compressed and released with each opening and closing of a cabinet door or enclosure cover. The spring-lock gaskets assure long life with consistent point-to-point contact, providing high shielding effectiveness and long life.

For applications requiring a moisture seal, an elastomer strip can be bonded to the edge of the extrusion opposite the gasket.

An added barrier to EMI/RFI interference can be achieved by utilizing a double-shielded construction. The double-shielded gasket is recommended for large doors where controlling the mating surface joint unevenness can be difficult and expensive. A further consideration for utilizing the rigid frame approach is the load bearing support of extruded aluminum which aids in applications where shock and vibration are encountered.

Standard knit wire mesh is available in either monel, tin-plated ferrous, or knit mesh with elastomer core of neoprene or silicone sponge.

The highest possible attenuation levels are achievable with EMI/RFI knitted wire gasketing. Attenuation levels beyond 110 dB int eh E-Field and 65 dB in the H-Field are common. Higher levels of attenuation are attainable with special materials and special design. Contact our sales engineers for additional information.

For more information click here.

O-Ring Inspection Equipment

In many critical applications (including automotive, aerospace, and life support, among others), 100% dimensional inspection of o-rings is often required. Seal & Design has a host of inspection machines that are dedicated to 100% inspection of o-rings and other seals, to ensure each individual part meets all drawing dimensions and other measurable specifications.

Also called vision systems, these machines use camera stations with either infrared or white light to measure any particular dimension of an o-ring that is deemed to be critical to function. From ID and OD to concentricity and ovality, our equipment measures and sorts parts quickly and efficiently. Seal & Design is home to a variety of inspection equipment, from machines dedicated specifically to o-rings and round parts, to machines that can measure virtually any shape.

Inspection RoomTo prevent any cross-contamination of the 100% inspected parts, bagging machines are attached directly to the inspection equipment. This allows for precise automatic bagging/sealing of parts, with customer required information including part numbers, quantities, and batch information printed directly onto the bags. From start to finish, the time it takes to inspect and bag an o-ring is often less than 10 seconds.

These inspection machines are just another component of Seal & Design’s World Class production facility, which is certified to ISO/TS 16949:2009 as well is ISO 9001:2008.

Learn more about Seal & Design’s o-ring offerings.

EMI/RFI Gaskets for Connectors

EMI/RFI Gaskets for Connectors

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Grounding of AN Series, Bendix and RF-Type connectors to an enclosure bulkhead in a manner that will reduce the ingress or egress of EMI/RFI interference can be accomplished through the use of these connector gaskets.

Connector gaskets materials can be selected to meet environmental and mechanical requirements of the package to be shielded. These gaskets offer optimum RF grounding of connectors at minimal cost.

The elastomer embedded product is both an EMI shield and moisture seal with a minimum thickness, thus not requiring extended protrusion from surface enclosures.

View Seal & Design’s EMI / RFI Offerings or Contact Seal & Design and learn how we can help create custom solutions for your applications.

Get to know Seal & Design: Ken Nyitrai – Quality Manager

In this installment we sit down with Seal & Design Quality Manager Ken Nyitrai.
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Q: What’s your role at S&D?
A:
I’m the Quality Assurance Manager. I oversee the quality department between all our divisions. My department’s job is to make sure that the raw materials coming in and finished parts going out are good. I also strive to make sure our company is continuously improving and to make sure we are utilizing best practices and meet all ISO and TS 16949 industry standards.

Q: What’s interesting about your job?
A: My job is fast paced and I find that interesting. I get to interact with all the departments and interface with our vendors when any issues occur.  It’s also challenging (and rewarding) to come up with new ways to tweak our already efficient processes to make sure we are continuously improving the company, all while providing high quality products to our customers.

Q: How do you “make it happen”?
A:
I’m at the office at 6:30 most every day. I’m usually busy hopping around the plant overseeing my department and looking for ways to improve our quality processes.

Q: What’s your favorite Seal & Design product?
A:
If I had to say anything I’d say PORON XRD is a fairly interesting product. It’s soft, yet firm at the same time, used as shock protection in sporting equipment, yet suitable for use in commercial applications.  We rarely have any complaints about our PORON family of products because it’s of high quality. And we love high quality products in my department!

For more information about Seal & Design visit our main website and to learn more about becoming a team member check out our job postings.

EMI/RFI Knitted Wire Mesh Gasketing

shield_seal_gasketing3All mesh EMI/RFI knitted wire gasketing is available in various cross sections to satisfy the many different requirements encountered in shielding applications. The choice between rectangular, round, round with fin or double round with fin depends on the enclosure or equipment to be shielded.

Each strip has the same resiliency created by the knit construction but reacts differently dependent on material and shape. Of the most common materials used, Monel has the best spring factors while silver-plated brass has the highest conductivity. All mesh gasketing which is rectangular or round is recommended for grove mounting while single round with fin or double round with fin is recommended for flat surfaces. Surface conditions must be clean and free from such contamination as paint or oil for good conductivity and there should be an even distribution of pressure continuously along the length of the gasket.

A wide range of knit wire mesh materials are available. The standard knit wire mesh is either Monel or tin-plated ferrous. While these are standar, aluminum, silver-plated brass, gold-plated copper, tungsten, stailess stell, silver, nickel, iconel, and other wire can be knit and fabricated into special products.

Learn more about Seal & Design’s EMI / RFI products

Rogers PORON Material

Rogers Corp PORON Material is engineered foam designed to provide the best durable lasting performance in a wide variety of cushioning applications. PORON foam is an open cell foam that has excellent compression set resistance.

PORON benefits:

  • Excellent compression set resistance which enables durable, long-term performance for gasketing, sealing, and cushioning.
  • Low-outgassing and non-fogging, containing no plasticizers or residual chemicals to contaminate the device. The material will not become brittle and crumble and is non-corrosive to metal.
  • Inherently flame retardant without the use of additives. Many of the materials meet UL HBF and MVSS 302.
  • Engineered urethane formulations offering a wide modulus range – 2-90 psi @ 25% deflection – for more design versatility requirements.
  • Good chemical resistance
  • Die-cuts cleanly and works with a broad range of adhesives
  • Broad range of formulas and thicknesses from 0.012″ to 0.500″ (0.43mm to 12.7mm)

Learn the difference between Open Cell Foam and Closed Cell Foam is highlighted in this short educational video from Rogers.

logo-rogers-preferred-converterSeal & Design is proud to be a Rogers PORON Preferred Converter.

There are several different formulations of PORON and Seal & Design can help you choose the right PORON material that meets your applications’ specifications.

Learn more about the Rogers PORON material line-up on our website.