Advantages of Plastic Injection Molding
Injection molding is useful in making components of large products that we use today. 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.
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. If you use thermoplastic, it is possible to produce complex shapes at a much lower cost than any other material. Taking on any shape is possible with thermoplastic because it is pliable and it hardens upon cooling. 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. With injection molding design precision is achieved, and structural soundness is maintained. Below are some of the other benefits of injection molding.
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.
Scrap plastic can still be used for other important parts and components. Scrap plastic and virgin plastic are of the same quality. Waste is minimized or almost eliminated.
Labor cost for using injection molding is a lot lower than what it would cost to mold 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. If the product is defaced then they are remade.
Despite its bad reputation as being non-biodegradable, plastics are highly recyclable and plants often use discarded and unused plastic parts.
Since almost everything in the work is done in the injection molding, then the finishing time is shorter. Labor cost and time is further reduced.
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.