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The History of plastic injection molding
In 1868, Hiatt developed a plastic material that he named Celluloid. Celluloid was invented by Alexander Parks in 1851. Hiat improves it so that it can be machined into a finished shape. Hyatt and his brother Isaiah patented the first plunger injection machine in 1872. The machine is relatively simple compared to machines used in the 20th century. It basically works like a giant hypodermic needle. The giant needle (diffuser) injects plastic into the mold through a heated cylinder.
In the 1940s, the Second World War created a huge demand for cheap, mass-produced products. , inexpensive, mass-produced products.
In 1946, American inventor James Watson Hendry built the first injection molding machine, which allowed more precise control of the injection speed and quality of the items produced. The machine also enables material mixing before injection so that colored or recycled plastics can be thoroughly mixed into the original substance.
In 1951, the United States developed the first screw injection machine, which did not apply for a patent, and this device is still in use.
In the 1970s, Hendry went on to develop the first gas-assisted injection molding process and allowed the production of complex, hollow products that cooled rapidly. This greatly improves design flexibility as well as strength and end-manufactured parts, while reducing production time, cost, weight and waste.
The History of plastic injection molding
In 1868, Hiatt developed a plastic material that he named Celluloid. Celluloid was invented by Alexander Parks in 1851. Hiat improves it so that it can be machined into a finished shape. Hyatt and his brother Isaiah patented the first plunger injection machine in 1872. The machine is relatively simple compared to machines used in the 20th century. It basically works like a giant hypodermic needle. The giant needle (diffuser) injects plastic into the mold through a heated cylinder.
In the 1940s, the Second World War created a huge demand for cheap, mass-produced products. , inexpensive, mass-produced products.
In 1946, American inventor James Watson Hendry built the first injection molding machine, which allowed more precise control of the injection speed and quality of the items produced. The machine also enables material mixing before injection so that colored or recycled plastics can be thoroughly mixed into the original substance.
In 1951, the United States developed the first screw injection machine, which did not apply for a patent, and this device is still in use.
In the 1970s, Hendry went on to develop the first gas-assisted injection molding process and allowed the production of complex, hollow products that cooled rapidly. This greatly improves design flexibility as well as strength and end-manufactured parts, while reducing production time, cost, weight and waste.
