Irregular screw boss wall thickness DFM check

The irregular wall thickness screw boss issues refers to the challenge of molding features with deviating from the nominal wall thickness.

Irregular wall thickness screw boss can cause non-uniform cooling and fails applied loads. Therefore, it is recommended to maintain screw boss's thickness variance from 40% to 60% across the nominal thickness to minimize the risk of sinking or fracture.

Irregular screw boss wall thickness detection conditions

MTK identifies this issue when the following condition is met:

where:

• $D_b$ — analyzed boss outer diameter
• $D_h$ — analyzed boss core hole diameter
• $T_n$ — nominal wall thickness
• $R_{min}$ — minimum boss to wall thickness ratio
• $R_{max}$ — maximal boss to wall thickness ratio

How MTK detects irregular screw boss wall thicknesses

MTK automatically analyzes B-Rep CAD models for irregular screw boss wall thicknesses. The SDK checks the relevant geometry against DFM criteria to identify potential issues that can increase manufacturing complexity or cost, or lead to quality or assembly problems.

Documentation and API reference

Detailed API reference for the irregular screw boss wall thickness DFM check is provided in the MTK documentation, including issue classes, detection interfaces, and integration details.

•  Irregular screw boss wall thickness DFM check API reference
•  Injection molding DFM API overview
•  Injection molding DFM analyzer example