Plastic injection molders hold a unique position in the precision part industry. The first area of difference in the rapid injection molding is that, rather than cutting away unwanted material to reveal the desired part, the injection process starts with an empty mold which will be filled with a viscous material and then cooled until the mold can be removed releasing the finished plastic injection parts. So in the case of a rapid injection molding process, it is actually the mold that is constructed using CNC processing to assure that the resulting part can be considered a precision part.
Even though both of the CNC machining process and the rapid injection molding process result in a solid plastic part, the processes are very different. The initial cost of Plastic Injection Molding is somewhat higher due to the cost of the design and construction of the mold, but after that initial cost, the price per piece is very little.
Plastic injection molders offer a myriad of color choices, since the material can be color manipulated. Another advantage to plastic injection parts is that the surface can be irregular. For instance, a piece could have a pebbled surface rather than a smooth one. This is very difficult to produce using CNC production processes.
Consider the number of small, inexpensive plastic items available to us everyday. A Lego block, with the little square corners and round knobby top, is made with a Plastic Injection Parts process. Imagine the cost of producing millions of those small pieces by starting up a CNC router or CNC mill. This is exactly the kind of project that is tailor made for the plastic injection molders.
If your next project uses some sort of plastic part, PlaSteel can help determine the best long term production process. Call today to speak to one of our helpful and friendly engineers about plastic injection molders or CNC precision manufacturing.