History of Plastic Injection Molding
In the year 1868, John Wesley Hyatt, a manufacturer of billiard balls, devised a method for making billiard balls from celluloid injection into an initial plastic injection mold. By upgrading celluloid, he prepared it for final processing. In year 1872, John and his brother unveiled the first plastic injection device that was simpler and less expensive than modern machinery. The machine used a piston to inject material from the hot cylinder into the mold.
As the industry progressed slowly over the years, other products such as shirt collar, buttons and pocket shoulders were developed. In the 1940s, the concept of plastic injection molds grew dramatically due to the massive demand for cheap, bulky products during World War II.
In the 1946 year, James Hendry invented the first spiral injection machine and transformed the plastic molding industry. Plastic injection molds, which, due to their excellent performance, especially the remarkable speed in the production of parts, are considered as one of the most suitable methods for high circulation production, but due to the high cost of designing and maintaining these molds, they require a higher number of molds. Significant for the industrial unit.
It should be noted that this method of production is one of the most economical and precise methods of making plastic products, especially in the automotive industry. These molds are in different dimensions, the most important factor being the size of the part produced, the number of parts produced, the cooling system and the clamping force.