Guide to Plastic injection Molding and Its Benefits
Today, components of large products that we use today are made using a process called injection molding. The process uses mold cavities into which materials in molten state are poured and solidified to from useful things like ice trays, bottle caps, bins, and other things.
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 durable, rust-free and very tough considering that it is low in density. If you use thermoplastic, it is possible to produce complex shapes at a much lower cost than any other material. Because it is pliable it can take on any shape and when it is cooled, the shape hardens. Plastic becomes brittle in very cold temperatures and this is why they put additives to prevent this. 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 helps to achieve design precision and maintain structural soundness. Below are some of the other benefits of injection molding.
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 save money with this and you will have less problem with waste management.
If you have waste plastic then they can be used to form other important parts and components. The quality of this waste plastic is the same as with virgin plastic. Waste is minimized or almost eliminated.
The cost of labor for using injection plastic is not as high the cost for molding plastic by hand. Productivity is high with injection molding and it is faster to manufacture products.
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.
People think of plastic as bad because it is non-biodegradable but it is highly recyclable like 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. Labor cost and time is further reduced.
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.