Why Plastic Injection Molding Is Useful
Injection molding is useful in making components of large products that we use today. 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. Below we will look at plastics and how this material is the best in terms of cost and recyclability.
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. 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.
Imagine if all plastic products in the world were handmade. We will have products with bad shapes and are structurally weak. Injection molding helps to achieve design precision and maintain structural soundness. Here are some of the advantages of this invaluable process.
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. You benefit on money savings and lesser problems with waste management.
If you have waste plastic then they can be used to form other important parts and components. 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 and the time taken to manufacture products is drastically cut down.
There are little or no defects with injection molded plastics. The common defects for this type of molded plastic includes burrs, an uneven layer, blisters when raised bits produce a rough and uneven surface, voids, empty spaces on the surface. Defaced products are remade.
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. It reduces further the cost of labor and time.
If metal and glass cannot be used in certain applications they use molded plastic products. Industries like automotive, oil, gas, and electronics use plastic on a regular basis.