Guide to Plastic injection Molding and Its Benefits
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.
The different kinds of materials that can be sued for injection molding are glass, metal, and thermoplastics. Below we will look at plastics and how this material is the best in terms of cost and recyclability.
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. 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 if all plastic products in the world were handmade. 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.
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. You can compare the quality of this waste plastic to 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. 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.
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.
Since almost everything in the work is done in the injection molding, then the finishing time is shorter. It reduces further the cost of labor and time.
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.