The reason why people use the hot runners more is that systems produce less wasted plastic (sprue), have shorter cycle times, use less energy, and require less manual labor for runner handling, trimming, and regrinding.

Taking your mold from good to great is as simple as testing it via Mold Flow Analysis (MFA). This software simulates your mold conditions before you open up your wallet to pay for tooling. The effect MFA has on the quality of the mold, the performance and appearance of your product makes it an indispensable component of any plastic injection molding design project.

Manufacturing a mold is not easy, there are many things to pay attention on, so you need to try to find a good mold supplier to make your money worth for this investment.

There are two ways to make two-color products, one is over moulding by 2-step injection, the other is double injection by single step, which includes using rotary table or axis to make two-color plastic injection products.