Week 8 - Challenge 6 - Core & Cavity Design

Draft angle: The degree of taper of the side wall of the mold or the angle of clearance designed to aid the removal of a part from a mold.

Most of the parts have a draft angle of min 3, but while designing we follow the general thumb rule of 1-degree draft per 1-inch depth.

Draft angle is provided along the TOOLING AXIS.

Tooling Axis: It is the direction in which the core and cavity of the mold move for the removal of the component inside it.

Creation of Tooling Axis Using Bisecting Method:

1. First, inspect the given CLASS A surface. Use the join feature to check whether the surface has a continuous boundary or not.
2. Then check the direction in which the component can be easily molded without any complications.
3. Extract the base of the depression portion of the switch bezel and create a point and axis system at that point.
4. Now switch to the sketcher workbench and project the side walls of the depression and draw lines along them.
5. Bisect that lines and convert those lines to construction lines.
6. Now create another sketch of a line at an angle to the remaining surface and bisect it with the previous bisector to get the TOOLING AXIS.

   

 

Draft Analysis Using Tooling Axis:

• After generating the Tooling Axis of the given CLASS A surface, insert the feature draft analysis from the analysis toolbox.
• Drag the axis system and try to align along the Tooling Axis.
• We observe the Draft analysis box that contains the mode, display, direction, and information of the tooling axis.
• Using the Draft analysis box complete draft analysis is performed and different draft angles are coded in different colors.

  

Results:

• After performing the draft analysis we obtained a graphical body with green on the top and red at the bottom.
• These colors are used as a reference to know the draft angle of the surface with respect to the Tooling Axis.
• In this analysis Green color represents the surfaces that have a draft angle of 2.9 degrees or above with respect to the Tooling Axis.
• The Red color represents the surfaces that have a draft angle of 0 degrees or less than zero with respect to the Tooling Axis.
• The Green color also indicates that they are cleared easily on the Cavity side and the Red color indicates the clearance of the surfaces on the Core side.