In 1868, Hyatt developed and improved a plastic material and makes it in the shape of an article. Then in 1872, he and his brother Isaiah registered the first patent plunger-type injection molding machine. Basically it is running like a giant hypodermic needle. This huge needles inject plastic into the mold through a heated cylindrical.
In the 1940s, during the Second World War, huge demand of cheap mass-produced for the product made it popular.
In 1946 American inventor James Watson Hendry build the first injection molding machine, which makes the injection more precisely controlling the speed and quality of an article. In 1951 the United States developed the first screw injection machine.
In the 1970s, Hendry then developed the first gas-assisted plastic injection moulding process and allows the production of complex, hollow products, of rapid cooling. This greatly increases the flexibility and strength of the design and the end parts manufactured while reducing production time, cost, weight and waste.