Why Plastic Injection Molding Is Useful
Today, components of large products that we use today are made using a process called injection molding. 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.
The different kinds of materials that can be sued for injection molding are glass, metal, and thermoplastics. Below we will look at plastics and how this material is the best in terms of cost and recyclability.
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. In particular, thermoplastic allows manufacturers to produce very complex shapes at a much lower cost than other materials. Taking on any shape is possible with thermoplastic because it is pliable and it hardens upon cooling. 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? These products can come out misshapen and structurally weak objects. Injection molding helps to achieve design precision and maintain structural soundness. Below are some of the other benefits of injection molding.
Since the molding cavities can only contain the amount of plastic that is needed, it minimizes or eliminates scraps. You save money with this and you will have less problem with waste management.
Other parts and components can be made from waste plastic. Scrap plastic and virgin plastic are of the same quality. Waste is minimized or almost eliminated.
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. Sometimes there are defects in the resulting plastic product with the common defects being burrs, uneven layers, blisters, voids, and empty spaces on the surface. Defaced products are remade.
Despite its bad reputation as being non-biodegradable, plastics are highly recyclable and plants often use discarded and unused plastic parts.
The injection molding process takes care of most of the work which makes the finishing time shorter. It reduces further the cost of labor and time.
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.