SPSpring Noise Dampening Technology

North Carolinians have enjoyed a rich tradition of manufacturing in their home state since the introduction of the cotton textile mill in the early 1800’s. Textiles has had its difficulties, but the processes and experience created a path to several evolving Industries. North Carolina is now known for their manufacturing of paper, aviation, aerospace, and furniture. The furniture industry has been a large part of Southern Precision Spring since opening its doors in the 1950’s. High Point, the furniture capital of the world, provided ample opportunities for wire form and spring production--but they did not come without obstacles. The number one complaint of furniture was noise. Southern Precision’s mission was to increase sales by providing a product to combat the squeaky clamors of an old deteriorating recliner. SPS accomplished that goal in the mid 1990’s.

In order to solve the noise issue, SPS had to research what caused the vibrations that would ultimately produce the sound. The experiment required a tester that would imitate the actions performed in the field. After we came up with a unit to test parts, we began stretching springs and diagnosing their vibrations. At first glance we were under the impression that this project would be fixed rather effortlessly. Two plastic sleeves placed on both hooks should reduce all vibration coming from the mechanism into the spring. However, our fix only solved 5% of the noise and vibration. The next thought was that if you could create a plastic sleeve over the entire spring (even when loaded) that should reduce the total vibration because it contacted the entire spring. This fix only solved 20% of the noise and vibration. Southern Precision was not satisfied and neither was the customer who wanted to achieve substantial reduction of noise from their mechanisms. We investigated further and determined that our obstacle was not how much plastic to put on the spring but how much surface area we could contact to reduce vibration travel. The Southern Precision Spring Secondary Department decided to use flexible foam that would mold and adhere to the ID or inner diameter of the spring. Our tests achieved at least 50% noise reduction depending on the total number of coils and ID of spring. SPS solved a customer’s problem by understanding how the parts could be improved and researching tirelessly the difficulties of our customer. Today SPS has refined the process and supplies several other markets as well. Southern Precision Spring is proud to be a hands on supplier and works hard every day not only in the facility manufacturing parts, but also in the field finding ways to solve problems companies may not even know they have.

“Price is what you pay, Value is what you get!”