Why Plastic Injection Molding Is Useful
A process called injection molding is used for making most of the products we use today, particularly components of large products. How these products are done is through the use of mold cavities where molten materials are poured and solidified, and some examples of these products are ice trays, bottle caps, and bins.
There are many different kinds of materials which can be used for injection molding and this includes glass, metal and thermoplastics. If we consider cost and recyclability, plastics rule over the other materials, and this will be discussed below.
Plastic is a 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. Plastic becomes brittle in very cold temperatures and this is why they put additives to prevent this. And when a product is finished, you can reheat it to form other shapes.
If you have to make plastic products by hand, what could be the result? 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. With this you get to save money on plastic, and you don’t have much waste as to worry about waste management.
Other parts and components can be made from waste plastic. Scrap plastic and virgin plastic are of the same quality. There is a great minimization of waste.
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.
If we speak of defects, plastic made with injection molding 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. They remake products that are defaced.
Though plastic is known to many as non-biodegradable, it is highly recyclable and plants can use discarded and unused plastic parts.
Since almost everything in the work is done in the injection molding, then the finishing time is shorter. The cost of labor and time is reduced further.
If metal and glass cannot be used in certain applications they use molded plastic products. Plastic is used by industries like automotive, oil, gas, and electronics on a regular basis.