There's more to injection molding (IM) than producing plastic Barbie Doll shoes and Action Man weapons. Not only plastic, but any material that can be somehow liquefied and injected into a mold can be subjected to the IM process. This applies to polymers, sugar in its many forms, glass, metals and other materials. IM is used to make everything from precision machined airplane parts to jelly alligators.
Mobile phone covers, toy bricks, plastic forks, styrofoam cups, metal scissors and the fans that go inside computers to keep them from overheating while you are playing Candy Crusher, all of these items are fashioned using IM technology. The process, which was first used in the mid-19th century, is amazingly versatile and yields gizmos and widgets for everything from kitchen gadgets to the International Space Station.
One application for the art is in the manufacture of collectible toy soldiers and military miniatures. If there was a war, chances are there are miniature toy soldiers for some enthusiast to recreate it. A horseback-mounted Duke of Wellington can set a collector back in the realm of $200. Intricately detailed and meticulously painted, lesser soldiers can be acquired for a much more reasonable price. Of course, when you are purchasing hundreds of the brave soldiers, it adds up pretty fast.
Electric toy train enthusiasts are avid consumers of IM technology. Where do you think the little toy trees and little toy engineers and signalmen come from? The amount of authenticity and detail that goes into making these items is breath-taking. Built to last, these pieces are often manufactured from molded metal so they are sufficiently robust to be passed down from generation to generation.
To produce metal parts, a fine metal dust is created and blended with a binder to produce a feedstock material that will go through machinery made from plastic. Surgical blade holders are manufactured using this process, as are engine parts for everything from motorcycles to airplanes.
The variety of items that can be produced via IM is mind-boggling. It is worth doing an image search on the Internet just to get an idea of the scope of work that this simple process is capable of giving rise to. Even the machines that produce the items have moving parts that have themselves been manufactured this way.
A surprising number of feeder industries are part of the IM process. Computer software programmers, polymer manufactures, the chemical industry that makes binders and other additives and the makers of molding machines all contribute to the art and science of the IM process. One thing that will be fun to watch in the coming years is how the IM industry will develop as the field of three-dimensional printing becomes more common.
Source : By Henry A. Parker, About the Author: Henry A. Parker has taught plastics molding techniques for over 15 years. He specializes in injection molding and thermoforming. If you are interested in learning more about plastic pallet supplier (http://ptmsolutions.com/global/products/) then he recommends you visit his friends at PTM: Custom Plastics Injection Molding Company (http://ptmsolutions.com/global/).
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