Lessons Learned from Years with Manufacturing

Guide to Plastic injection Molding and Its Benefits

A process called injection molding is used for making most of the products we use today, particularly components of large products. Ice trays, bottle caps, and bins are just some of the products that are made from injection molding which uses mold cavities where molten material is poured and solidified.

Glass, metals and thermoplastics are the materials that can be used for injection molding. If we consider cost and recyclability, plastics rule over the other materials, and this will be discussed below.

The best and low cost alternative to metal, which is expensive, and glass, is plastic. Durable, rust-free and very tough despite its density, are the characteristics of plastic that makes it superior to others. Producing complex shapes at a much lower cost than other materials is possible with thermoplastic. Because it is pliable it can take on any shape and when it is cooled, the shape hardens. In order to reduce brittleness when plastic is exposed to very cold temperatures, additives are added. And when a product is finished, you can reheat it to form other shapes.

Imagine if all plastic products in the world were handmade. We would be left with misshapen and structurally weak objects that wouldn’t last a day. Injection molding helps to achieve design precision and maintain structural soundness. Here are some of the advantages of this invaluable process.

Minimizing or eliminating scrap is one of the benefits of using injection molding because the cavities can only contain the amount of plastic that is needed. You benefit on money savings and lesser problems with waste management.

Scrap plastic can still be used for other important parts and components. Scrap plastic and virgin plastic are of the same quality. There is a great minimization of waste.

Labor cost for using injection molding is a lot lower than what it would cost to mold plastic by hand. There is high productivity and the time taken to manufacture products is drastically cut down.

Injection molded plastics usually have very little or no defects. Burrs, uneven layers, blisters, voids, and empty spaces on the surface are the common defects of this type of molded plastic. If the product is defaced then they are remade.

Though plastic is known to many as non-biodegradable, it is highly recyclable and plants can use discarded and unused plastic parts.

The injection molding process takes care of most of the work which makes the finishing time shorter. Labor cost and time is further reduced.

Molded plastic products are often the only solution where metal and glass cannot be used. Industries like automotive, oil, gas, and electronics use plastic on a regular basis.

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