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. How these products are done is through the use of mold cavities where molten materials are poured and solidified, and some examples of these products are ice trays, bottle caps, and bins.
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.
Plastic is a 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. Its pliability allows it to take o almost any shape but hardens when cooled. In order to reduce brittleness when plastic is exposed to very cold temperatures, additives are added. Reheating the finished product will allow you to change the form of its shape.
Imagine if all plastic products in the world were handmade. These products can come out misshapen and structurally weak objects. Injection molding ensures precision in design and soundness in structure. The process of injection molding has other benefits like the ones given below.
Since the molding cavities can only contain the amount of plastic that is needed, it minimizes or eliminates scraps. With this you get to save money on plastic, and you don’t have much waste as to worry about waste management.
Other parts and components can be made from waste plastic. Scrap plastic and virgin plastic are of the same quality. 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. 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.
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. The cost of labor and time is reduced further.
Molded plastic products are often the only solution where metal and glass cannot be used. Industries like automotive, oil, gas, and electronics use plastic on a regular basis.