What Is Plastic Injection Molding?

A Leap in History

Machines for plastic molding / spuitgieten have been strongly influenced by technological changes, seeking that the molded parts have a lower production cost, which required to increase the injection speed to the correct temperature, in a short and precise cycle. The plastic has become one of the essential materials in the modern life of man, thanks to its ability to be manipulated to adopt virtually any form, thus becoming one of the most revolutionary inventions in history.

The injection molding process is the most popular technique for manufacturing plastic parts. This is due to the enormous variety of ways in which this material can be molded, even when they are complex, as well as being a fast and efficient process. One of the most important advantages is that the molded parts require very little finishing work because this process allows manufacturing infinity of items in one piece, with textures, colors and other variables defined directly from the injection in the mold.

The Molding Principle

The principle is very simple: In a machine, a plastic material is melted, which is injected into a mold that gives the desired shape. This seems simple, but it is a process that requires a perfect synchronization of times and movements. The molds have two parts that when joined together form a cavity. During the process, powerful resistances melt the plastic that is then injected into this space inside the mold, creating a piece that solidifies and is automatically ejected.

The precision with which these teams work, which have a large number of pieces that perform as an orchestra, is essential to obtain the right quality and performance since all the pieces of the production must be the same.
How can the injection molding of plastic be accelerated?

The cycle time of the plastic injection molding process can be broken down into the injection time, the cooling time and the setting or transition time. By reducing some of these times, the production costs decrease. The frequent changes of molds allow reducing the inventory and offering a faster response to market demands


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