Seven Benefits of Plastic Injection Molding

Plastic injection molding is one of the most popular methods to mass produce plastic parts. This method involves feeding plastic material into a heated barrel. After mixing the material, it is led into a mold cavity where it takes shapes and hardens into the final product. You can learn more about this method at Plastic injection molding has many benefits over other plastic processing methods. They include the following:

Flexible Design

Injected molded parts have nearly an unlimited amount of flexibility regardless of the produced parts’ size. The plastic within the molds is pressed tighter than other molding processes as the plastic within the molds is subjected to very high pressures. Also, computer aided design (CAD) and computer aided manufacturing (CAM) make the inclusion of minute details and complex designs into the design of the parts possible.


Plastic injection molding can fabricate almost any kind of plastic part. While there are some design restrictions, the molds made let the finished product to be quite precise. Indeed, accuracy is usually within 0.005 inches.

Production Efficiency

After designing the injection mold to specification and programming the presses, the actual molding process is quite fast compared to other molding methods. Products can be mass produced through the plastic injection molding process all from one mold. Because of the process’ high production rate, it tends to be a cost-effective and efficient method.

Strength Improvement

The plastic injection process usually a unique option within applications where parts must be durable and strong. In this process, fillers can be used in the molds. The fillers minimize the density of the plastic while adding greater strength to the molded part.

Finished Appearance

With plastic injection molding, parts can be produced with little to no end finishing. This is because the parts that come out of the mold nearly have a finished look. They have a smooth finished look.

Material Flexibility

Plastic injection molding can include various kind of plastic simultaneously. Co-injection molding introduces two compatible materials into one injection mold where the core material is fully encapsulated. This process allows increased strength, decreased costs, and other properties like reduced energy consumption because of the reduced melting point of the secondary plastic.

Reduced Waste

The majority of plastics can be recycled and the injection molding process allows for recycled plastics by grinding them up and melting them over again. In addition, the high tolerance on part molds results in less waste within the original manufacturing process.