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. 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.
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.
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. If you use thermoplastic, it is possible to produce complex shapes at a much lower cost than any other material. Its pliability allows it to take o almost any shape but hardens when cooled. There is a need to put additives so that the plastic will not be so brittle especially when exposed to very cold temperatures. 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 will have products with bad shapes and are structurally weak. Injection molding ensures precision in design and soundness in structure. 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. 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.
There are little or no defects with injection molded plastics. Burrs, uneven layers, blisters, voids, and empty spaces on the surface are the common defects of this type of molded plastic. If the product is defaced then they are remade.
Despite its bad reputation as being non-biodegradable, plastics are highly recyclable and plants often 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.
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.