When was the injection molding machine invented?

Plastic injection molding today works a little differently from before World War II. The opportunities provided by plastic injection molding are applied by essentially every manufacturing sector:

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• Electronics
• Automotive
• Home appliances
• Housewares

and more.

In addition, plastic injection molding is an affordable and effective method of producing high-quality parts and products.

Today's technology is quite similar to the technologies used in the past. However, computers have made the whole design and manufacturing injection process more manageable. Injection machines can use computers to make manufactured parts with greater precision. In the present day, plastic components are often the preferred choice for advanced technological and scientific applications.

With the growing concern for the environment, each attempt to make the plastic production process more environmentally friendly and sustainable can significantly contribute to preservation. As a result, many manufacturers have already implemented green practices into their operations.

What Changes Have Happened in Plastic Injection Molding Since It Started?

Ever since the late s, this method of production has been used to manufacture products such as toothbrushes and hair clips. While there have been changes to plastic injection molding methods, the basic techniques are the same. Since the extrusion screw injection machine was invented, other, more automated machines have been created to increase injection speed.

Early plastic was hard to work with and difficult to shape into different items. Inventors worked with the primary material and developed a more durable and easier form with which to work. Shortly after, plastic injection molding was also established.

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Although the basic injection molding techniques have remained similar, the materials used have changed. Plastics are now offered in a wider variety than when plastic injection molding methods were first invented. Currently, plastics with different melting points are accessible, and it is also possible to include additives that create specific qualities for the finished product.

Early molds were very simple, with only two parts. Now, very complicated molds are used that may have more than two areas or parts.

Although materials may have changed, the plastic injection molding methods are still the same at their most basic level. The process still calls for heated plastic to be injected into a mold and then chilled. Usually, chilling occurs thanks to coolant passing over and around the molding chamber where the plastic is shaped. The hardened plastic forms are then ejected and cut down to be ready for sale or use.

While early plastic was challenging to work with, a later form of plastic developed soon after was easier to shape into different items. This was the first real step toward modern injection molding processes. As soon as more versatile forms of plastic were invented, plastic injection molding methods similar to those used today were also created.

There changes to the plastic injection molding methods since their invention are minimal, but the more significant changes have been to the plastics themselves. Now, plastics are available in a much wider variety than they were in the late s. In addition, plastic that is being molded can now be colored since dyes and other chemical additives can now be mixed in with the plastic granules themselves. Specific additives can give plastics unique qualities that make them more suitable for use in different industries and products.

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