Halogen Work Light Bulb Holder – One-hundred-and-thirty ages back, Thomas Edison finished the first successful sustained test of this incandescent light bulb. With a few incremental improvements along the way, Edison’s fundamental technology has emphasized the world ever since. This is about to change. We are on the cusp of a semiconductor-based lighting revolution which will ultimately replace Edison’s bulbs with a far more energy-efficient lighting alternative. Solid state LED lighting will gradually replace almost all of the countless billions of fluorescent and incandescent lighting being used around the world today. In reality, as a step along this route, President Obama last June unveiled new, more rigorous lighting standards that will encourage the phasing out of incandescent bulbs (which are banned in parts of Europe).
To understand just how revolutionary LED light bulbs are and why they’re still pricey, it’s instructive to look at how they’re manufactured and also to compare this to the manufacture of incandescent light bulbs. This article explores how incandescent light bulbs are created and then contrasts that procedure with a description of the typical production process for LED light bulbs. So, let’s start by taking a look at how conventional incandescent light bulbs are manufactured. You will realize that this really is a classic example of an automated industrial process elegant in more than a century of experience.
While human incandescent light bulb forms differ in size and wattage, so all of them have the three basic parts: the filament, the bulb, and the foundation. The filament is made from tungsten. The linking or lead-in wires are typically made from nickel-iron wire. This wire is dipped into a borax solution to make the wire more adherent to glass. The bulb itself is made from glass and contains a combination of gases, generally argon and nitrogen, which increase the life span of the filament. Air is pumped from the bulb and replaced with all the gases. A standardized foundation holds the entire assembly in place. Aluminum is used on the exterior and glass used to insulate the interior of the base.
Originally produced by hand, light bulb manufacturing is now almost completely automated. |} Then, the wire is wound around a metal bar called a mandrel in order to mold it into its appropriate coiled shape, and after that it’s heated in a process known as annealing, softening the wire and leaves its structure more uniform. The mandrel is then dissolved in acid. Secondly, the coiled filament is attached to the lead-in wires. The lead-in wires have hooks at their ends that are either pressed over the conclusion of the filament or, in bigger bulbs, spot-welded.
Third, the glass lamps or casings are made using a ribbon machine. Once heating in a furnace, then a continuous ribbon of glass moves along a conveyor belt. Precisely aligned air nozzles blow off the glass holes in the conveyor belt into molds, making the casings. A ribbon machine moving at high speed can create greater than 50,000 bulbs per hour. Following the casings are blown, they are chilled and then cut off from the ribbon machine. Then, the interior of the bulb is coated with silica to remove the glare caused by a glowing, uncovered filament. The label and wattage are then stamped on the exterior top of every shell.