5 Lessons Learned: Manufacturing

Why Plastic Injection Molding Is Useful

Injection molding is useful in making components of large products that we use today. The process uses mold cavities into which materials in molten state are poured and solidified to from useful things like ice trays, bottle caps, bins, and other things.

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.

As we know plastic is the low cost alternative to expensive metal and glass. 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. If you want to form other shapes from a finished product, you can just simply reheat it.

Imagine if all plastic products in the world were handmade. These products can come out misshapen and structurally weak objects. Injection molding helps to achieve design precision and maintain structural soundness. The process of injection molding has other benefits like the ones given below.

If molds are used the amount of scrap is reduced or eliminated because the cavities are shaped to contain only the amount of plastic that is needed. With this you get to save money on plastic, and you don’t have much waste as to worry about waste management.

Scrap plastic can still be used for other important parts and components. Scrap plastic and virgin plastic are of the same quality. Therefore waste is minimized.

Injection molding labor cost is a lot lower than molding plastic by hand. There is high productivity with injection molding and it produces products at a much faster rate.

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. Defaced products are remade.

People think of plastic as bad because it is non-biodegradable but it is highly recyclable like plants can use discarded and unused plastic parts.

With injection molding there is a shorter finishing time because the process always takes care of most of the work. Labor cost and time is further reduced.

The only solution where metal and glass cannot be used in certain applications is the use of plastic injection molded products. It is on a regular basis that plastics are used in industries like automotive, oil, gas, and electronics.

Partner post: see it here