Plastic injection molding is the most common process for production of plastic parts and products. In this process a plastic injection molding machine injects thermoplastic resins at high speed and high pressure into a steel mold.
When designing your injection molded part abide by the following guidelines where possible:
Keep wall thickness constant throughout the part.
Use a wall thickness not too thick or too thin for the kind of plastic material used.
Use rounded corners instead of sharp corners where possible.
Add draft to surfaces parallel to the direction of part ejection from the mold. This will ease part ejection.
Limit the use of undercuts to reduce the required number of slides or side cores in the mold.