The history of plastic injection molding dates back to the late 19th century. Since then, the process has undergone several major changes and advancements. These changes have led to the modern injection molding process used today.    

The first injection molding machine was invented in 1872 by American inventor John Wesley Hyatt. Hyatt’s invention was inspired by the need for an alternative to the tedious process of manually shaping and cutting celluloid sheets. His invention allowed for the mass production of identical parts with little to no human intervention.Early injection molding machines used a plunger to inject molten plastic into the mold. The plungers were manually operated and not very precise. As a result, the parts produced were usually of poor quality and had to be discarded.

Thanks to the Industrial Revolution, the injection molding process improved dramatically in the late 19th century. The introduction of electricity facilitated the development of hydraulic injection molding machines. These machines were faster and more accurate than manual machines. The new hydraulic injection molding machines had several advantages over manual machines. They were faster and produced parts with greater precision. This means producing higher quality parts with fewer defects.

Injection molding processes made further advances in the 20th century. The advent of electric injection molding machines allowed for faster part production. These machines also provided better control over the injection of molten plastic, resulting in more accurate parts. Electric injection molding machines have several advantages over manual and hydraulic injection molding machines. Electric injection molding machines are faster, more precise, and have better control over the injection of molten plastic. This results in more accurate parts produced with fewer defects.

The modern injection molding process has seen the development of computerized injection molding machines. These machines have increased speed and accuracy, allowing for more precise production of parts. In addition, the use of modern materials such as polycarbonate allows for better performing parts. Modern injection molding offers several advantages over traditional methods. It is able to produce parts with greater accuracy and precision. In addition, the use of modern materials allows for the production of parts with greater strength, durability, and flexibility.

Advances in plastic injection molding technology have made it faster, more accurate and more efficient. From its invention in the late 19th century to the present, injection molding has undergone several major changes and advancements. These changes have resulted in the production of parts with greater precision and better performance. The impact of this process on society has been tremendous, revolutionizing the way products are made and creating countless jobs in the process.