The following guidelines for designing injection molding part are compiled by Harbec Plastics:

• Molds
• Bosses
• Fillet and Corner Radii
• Product Design
• Rib to Wall Ratio
• Part Tolerances
• Draft Angles
• Under Cuts
• Inserts and Thread Forming Screws
• Sanp Fits
• Molding Resins
• Part Surface Finishes
• Example of Good Design