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A Brief History of Injection Molding
- 1. A Brief History of Injection Molding Plastic injection molding has an interesting story!
- 2. 1. 1861-1868 Alexander Parkes invented the first man-made commercial plastic in 1861. In 1868, an American inventor named John Wesley Hyatt developed a plastic material called Celluloid made by combining cellulose nitrate and camphor.
- 3. 2. 1872-1909 John Wesley Hyatt and his brother Isaiah patented the first injection molding machine in 1872. It basically worked like a large hypodermic needle. In 1909, Leo Hendrik of Belgium discovered phenolformaldehyde plastic and was the first to control it and make it usable on a large scale.
- 4. 3. 1930-1939 During the 1930s, major vinyl thermoplastics still used today like polystyrene, PVC, and the polyolefins were in the initial development stage. In 1938, polystyrene (a plastic still used widely today) was officially invented. The following year, WWII brought a huge demand for cheap, mass-produced materials. Polystyrene plastic
- 5. 4. 1941-1946 Developed by Du Pont as a fiber in the 1930s, nylon was first used as a molding material in 1941. In 1946, an American inventor named James Watson Hendry built the first extrusion screw injection machine. The rotating screw made the injection speed easier to control and it helped produce higher quality results.
- 6. 5. 1946-1955 During these particular years, polyethylene, polystyrene, and other materials that had been more expensive in the past, were starting to be produced more cheaply. They also started to replace not only other plastics, but also more traditional materials like wood, metal, leather, and glass. Made from polyethylene plastic
- 7. 6. 1956-1965 In 1956, W.H. Willert developed the reciprocating injection molding machine. In this machine, the screw moves backwards and forwards during the mold cycle. After mixing, the screw stops turning and the whole screw pushes forward, plunging the material into a mold. This time period also brought forth many useful new thermoplastics like high-density polyethylenes and polypropylene.
- 8. 7. 1960-1980 In the 1960s, polysulphones, aromatic polyesters, and polyamides were introduced. In the 1970s, James Watson Hendry went on to build the first gas-assisted injection molding process. This made producing complex, hollow products that cooled quickly possible. His new design improved the strength and finish of manufactured parts and reduced production time, cost, weight, and waste.
- 9. 8. Today Now (in 2015) there are plastic injection molding companies whose sole purpose is to make virtually anything (car parts, tools, toys, décor) by using electric injection molding machines. Most anything can be made out of plastic these days, and businesses are taking advantage of this by outsourcing their large scale injection molding projects to injection molding companies.
- 10. Call Streamline Plastics Today If you own a business and you’ve been looking for a plastic injection molding company to make your 3- dimensional designs a reality, call Streamline Plastics today. Finding injection molding companies that are as efficient, accurate, and timely as us is difficult. Don’t try to design a product, create a prototype, and use an injection molding machine on your own. We can do that for you if you contact us today by calling 801-782-3660 or by visiting streamlineplastics.com.