Why Plastic Injection Molding Is Useful
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.
Glass, metals and thermoplastics are the materials that can be used for injection molding. In the discussion below, we will look at plastics which is the best materials among others in terms of cost and recyclability.
Plastic is a low cost alternative to expensive metal and glass. 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. There is a need to put additives so that the plastic will not be so brittle especially when exposed to very cold temperatures. And when a product is finished, you can reheat it to form other shapes.
If you have to make plastic products by hand, what could be the result? We will have products with bad shapes and are structurally weak. Injection molding ensures precision in design and soundness in structure. 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. You save money with this and you will have less problem with waste management.
Other parts and components can be made from waste plastic. The quality of this waste plastic is the same as with 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.
If we speak of defects, plastic made with injection molding 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.
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. 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.