Injection molding is a mature process used to manufacture parts from a massive and growing range of plastics.
This technique is very popular for mass production as it is currently the cheapest and fastest way to realise large numbers of the same parts. The tools are quality checked before commencing production and the parts are checked sporadically to ensure there are no quality issues. In fact, the quality department will check it over and review it for flaws and errors against the original design before it is given to the customer as a sample. Injection molding is a favourite with customers because they want to be able to place an order and have a quick turnaround time and receive quality parts.
Profit margin is usually the driving factor in businesses so the sooner they can have something on the market and available for purchase for their clients then the better the business works. The key is to use a supplier that can build the final product with quality and durability so that it can withstand the pressures of its designed use and high performance.
They have the flexibility to allow design changes, fix flaws and correct errors on a small scale instead of having to go through the hassle of a recall because they bypassed this step. Once the customer is satisfied and gives the final approval then mass production can begin.