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So, the assembly process requires fewer steps and is faster than traditional sewing methods. As you saw with New Balance shoes, ultrasonically welding dissimilar materials requires an additional material -- in the case of the New Balance shoes, it's a film that can be bonded between the synthetic suede and the mesh. They use an iron press to bond a thin sheet of hot melt film to the back of the material. Use this book pillow to provide the perfect place to curl up with a favorite story.

And there are also many small items that can become temporarily misplaced (substitute lost here), like the cording foot you haven't seen since you finished that throw pillow project a couple of years ago. Make sure that the sides of each square of fabric you actually want to see when the pillow is finished are facing each other. x finance knowledge for interview this approach, remember that when the sun casts shadows, those shadows are in the opposite direction as its position in the sky.

Upon cooling, the plastic surfaces are welded together.

Finally, a horn or sonotrode focuses the ultrasound vibrations and delivers them to the materials to be welded. The horn gets retracted and the welded materials can be removed from the anvil. Pressure is applied to keep the horn in contact with the welded materials and to hold them together. There is also some method to apply force (usually air pressure supplied by a pneumatic piston) to hold the materials together during welding.

The factors that vary in ultrasonic welding are the frequency of the sound waves (usually 20, 30 or 40 kHz), the pressure applied to hold the materials together, and the time over which the ultrasound is applied (fractions of a second to more than one second). Introduction to Switch Gears - Switch Gear is one of the important devices in electrical power systems. Complete list of Low Voltage Switch Gear (LVS) Products!

For one, welding occurs at low temperatures relative to other methods. The process occurs in fractions of a second to seconds. First, the depths of the welds are less than a millimeter, so the process works best on thin materials like plastics, wires or thin sheets of metal.

Welding times can vary, but the welds can form in as little as 0.25 seconds. Now that you know the basics behind ultrasonic welding, let's look at the welding process itself. And what actually happens during the welding process depends on the nature of the materials.

Now that we have seen how ultrasonic welding is used to bond various materials, let's look at the advantages and disadvantages of this technique. The packaging industry uses this technique to make films, assemble tubes and blister packs. These composite materials make the shoes light, flexible, durable and breathable. While traditional shoes may be made of a single material such as canvas or suede leather, many athletic shoes have several materials such as lightweight plastic polymers, suede or synthetic suede, and mesh combined.