What is Injection Molding And Is It Good For My Project?

October 22nd, 2015

Injection Molding MachineInjection molding is the process of taking pellet sized base resin and other additives such as colorants, stabilizers and heating them to liquid form then injecting them under force into custom mold cavities. The plastic forms to the mold and is cooled by chilled water being circulated through channels in the mold. When the plastic is again solid form it is ejected from the mold. Then the process begins again.

The benefits to injection molding include:

  1. Ease: The process of injection molding is mostly an automated process, you avoid high costs in team labor.
  2. Flexibility: The design possibilities are almost endless. A mold designer can design the mold to your specifications. The many varieties of resin on the market give a multitude of choices to find the best fit for the client’s application. The base resins are able to take color and other additives making this process a build to suit your needs more than any other.
  3. Efficiency: The process of injection molding is typically low waste. Leftover resin from the process can be recycled and reused to make more parts. This is cost saving and eco-friendly.
  4. Speed: Once production is underway, most molding takes under 60 secs to produce. This makes it ideal for mass production.

The process of injection molding is perfect for not only the small business and inventors/entrepreneurs but large companies. For large companies it makes sense to run high volumes needed in short amounts of time with great consistency. That is a benefit of injection molding. For the small business they may be looking for short run size or time based on what volume is best for them. For inventors this is also ideal, an inexpensive prototype mold can be made, samples can be produced to see if their concept is viable in the market place. After the product is established a more permanent tool can be made for production volumes. So any size project can utilize injection molding. In our next tip we will cover the topic of mold design, costs and timeline.