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.
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.
As we know plastic is the low cost alternative to expensive metal and glass. Plastic is known for its durability, rust resistance, and toughness despite its being low in density. In particular, thermoplastic allows manufacturers to produce very complex shapes at a much lower cost than other materials. Because it is pliable it can take on any shape and when it is cooled, the shape hardens. In order to reduce brittleness when plastic is exposed to very cold temperatures, additives are added. If you want to form other shapes from a finished product, you can just simply reheat it.
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 ensures precision in design and soundness in structure. 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 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. Therefore waste is minimized.
Labor cost for using injection molding is a lot lower than what it would cost to mold 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. 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. If the product is defaced then they are remade.
Though plastic is known to many as non-biodegradable, it is highly recyclable and plants can 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.
The only solution where metal and glass cannot be used in certain applications is the use of plastic injection molded products. Industries like automotive, oil, gas, and electronics use plastic on a regular basis.