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. 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. If we consider cost and recyclability, plastics rule over the other materials, and this will be discussed below.
The best and low cost alternative to metal, which is expensive, and glass, is plastic. Plastic is known for its durability, rust resistance, and toughness despite its being low in density. Producing complex shapes at a much lower cost than other materials is possible with thermoplastic. Its pliability allows it to take o almost any shape but hardens when cooled. There is a need to put additives so that the plastic will not be so brittle especially when exposed to very cold temperatures. If you want to form other shapes from a finished product, you can just simply reheat it.
Imagine a world where all plastic products have to be created by hand. These products can come out misshapen and structurally weak objects. Injection molding helps to achieve design precision and maintain structural soundness. Here are some of the advantages of this invaluable process.
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.
Scrap plastic can still be used for other important parts and components. You can compare the quality of this waste plastic to virgin plastic. Therefore waste is minimized.
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.
If we speak of defects, plastic made with injection molding have very little or no defects. Burrs, uneven layers, blisters, voids, and empty spaces on the surface are the common defects of this type of molded plastic. Defaced products are remade.
Though plastic is known to many as non-biodegradable, it is highly recyclable and plants can 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.
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.