RPM Industries LLC
plastic injection molding

The Evolution of Plastic Injection Molding Companies Over the Years

Today, reputable plastic injection molding companies are in high demand thanks to the evolution of this process. With the introduction of new machines, processes, and materials, companies that manufacture plastic parts and components have expanded and evolved. For instance, from the time that Jons Jacob Berzelius produced the first condensation polymer in 1847, other pioneers introduced new materials including polycarbonate, polypropylene, and polystyrene, among others.


As mentioned, even processes have changed dramatically over the years. Since 1872 when brothers John Wesley and Isaiah Hyatt patented the first machine for plastic injection molding, new machines make it possible to offer different processing methods. Included are plastic injection stretch molding and rapid injection molding, both of which are tremendous assets today.


Modernized Machines

As you can imagine, the original plastic injection molding machine was very different from what manufacturing companies now use. Early on, these machines had a simple design, whereas today, they are quite sophisticated. Because of that, injection molding machines are capable of producing everything from small, simple parts and components to large, complex objects. Modern-day machines also handle large production runs while providing finished products void of defects.


Especially during World War II, it was critical for the military to get mass-produced products at inexpensive prices. James Watson, an American inventor, developed the first screw injection machine. As a result, manufacturers had better control of both quality and speed. That invention also made it possible to mix materials before injection. Of the injection molding machines used today, the majority are the screw type.


When it comes to design, companies that manufacture products using a plastic injection molding machine have dramatically improved flexibility. These machines also produce parts and components of a higher strength. Ultimately, manufacturers can reduce the amount of time required for production, use lighter-weight materials, experience less waste, and save customers money.


Rapid Injection Molding

This process is a perfect example of how far manufacturers have come. For customers who need parts and components made quickly without compromising on quality, this is the ideal solution. Although they are used for creating prototypes as opposed to finished products, this injection molding method plays a critical role in the overall manufacturing process.


With prototypes, engineers can make changes as needed before going into full production mode, thereby keeping orders on schedule and costs down. Ultimately, this ensures that you get what you need without delay.