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.
There are many different kinds of materials which can be used for injection molding and this includes glass, metal and thermoplastics. In the discussion below, we will look at plastics which is the best materials among others in terms of cost and recyclability.
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. 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 a world where all plastic products have to be created by hand. We will have products with bad shapes and are structurally weak. 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. With this you get to save money on plastic, and you don’t have much waste as to worry about 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. 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. There is high productivity with injection molding and it produces products at a much faster rate.
Injection molded plastics usually have very little or no defects. 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. They remake products that are defaced.
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. 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. It is on a regular basis that plastics are used in industries like automotive, oil, gas, and electronics.