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. 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. 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. Reheating the finished product will allow you to change the form of its shape.
Imagine if all plastic products in the world were handmade. These products can come out misshapen and structurally weak objects. With injection molding design precision is achieved, and structural soundness is maintained. The process of injection molding has other benefits like the ones given below.
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.
Other parts and components can be made from waste plastic. The quality of this waste plastic is the same as with virgin plastic. Waste is minimized or almost eliminated.
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.
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. The cost of labor and time is reduced further.
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.