Fluorescent Light Bulb Types – One-hundred-and-thirty years ago, Thomas Edison completed the first successful sustained evaluation of the 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 that will ultimately replace Edison’s bulbs using a far more energy-efficient lighting alternative. Solid state LED lighting will gradually replace almost all of the countless billions of fluorescent and incandescent lights being used around the world today.
To know exactly how revolutionary LED light bulbs are as well as why they’re still pricey, it is instructive to look at how they’re fabricated and to compare this to the manufacture of incandescent bulbs. This article investigates how incandescent light bulbs are made and then contrasts that process with a description of the normal production process for LED light bulbs. So, let’s begin by having a look at just how conventional incandescent light bulbs are manufactured. You’ll realize this really is a classic example of an automatic industrial process elegant in over a century of experience.
While human incandescent light bulb forms vary in size and wattage, all of them have the 3 primary parts: the filament, the bulb, and the foundation. The filament is made of tungsten. While very fragile, tungsten filaments can withstand temperatures of 4,500 degrees Fahrenheit and above. The linking or lead-in cables are generally made of nickel-iron cable. This cable is dipped to a borax solution to generate the cable more adherent to glass. The bulb itself is made of glass and has a mixture of gases, usually argon and nitrogen, which increase the life span of the filament. Air is pumped from the bulb and replaced using the gases. A standardized foundation retains the entire assembly in place. The foundation is known as the ” Edison screw base.” Aluminum is used on the exterior and glass used to insulate the interior of the base.
Originally produced by hand, light bulb manufacturing is currently almost entirely automated. |} To begin with, the filament is fabricated using a process known as drawing, where tungsten is mixed with a binder cloth and pulled through a die (a shaped orifice) to a nice wire. Then, the cable is wound around a metal bar called a mandrel in order to mold it to its proper coiled shape, and after that it is heated in a process known as annealing, softening the cable and leaves its structure more uniform. Second, the coiled filament is attached to the lead-in cables. The lead-in cables have hooks at their ends which are either pressed over the end of the filament or, in larger bulbs, spot-welded.
Third, the glass bulbs or casings are made using a ribbon machine. Once heating in a furnace, a continuous ribbon of glass moves along a conveyor belt. Precisely aligned air nozzles blow off the glass holes in the conveyor belt to molds, making the casings. A ribbon machine going at high speed can produce more than 50,000 bulbs per hour. Following the casings are dismissed, they are cooled and then cut from the ribbon machine. Then, the interior of the bulb is coated with silica to remove the glare brought on by a glowing, uncovered filament. The wattage and label are then stamped onto the exterior top of each casing.