Injection Molding Mechanical Tolerances and Surfaces
Continued from Injection Molding Process Troubleshooting
Injection Molding Mechanical Tolerances and Surfaces:
Molding tolerance is a specified allowance on the deviation in parameters such as dimensions, weights, shapes, or angles, etc. To maximize control in setting tolerances there is usually a minimum and maximum limit on thickness, based on the process used.
Injection molding typically is capable of tolerances equivalent to an IT Grade of about 9-14. The possible tolerance of a thermoplastic or a thermoset is +- 0.008 to +- 0.002 inches. Surface finishes of two to four microinches or better are can be obtained. Rough or pebbled surfaces are also possible.
Continued to Injection Molding Part Inserts