Challenge

Week 8 - Challenge 2 - Switch Bezel Design

SSarang Vispute9 Aug 2022

Aim :- To design the Switch Bezel plastic component through the given Class-A surface.

Objective :-

To create a proper tooling direction.

To perform draft analysis of the plastic component.

To design the switch bezel plastic component by creating the B-Surface and C-Surface using the given Class-A surface.

Tooling Direction :-

Tooling axis is the direction in which mold or core and cavity opens. The ejection of the part from mold depends on the draft. A zero draft can result in difficult or no ejection due to shrinkage. It is recommended to add a minimum of 0.5 to 1 degree of the draft for non-textured surface & 3 to 5 degree of draft for textured surfaces.

Procedure to create the tooling axis using bisecting method :-

following Class A surface is provided to design the switch bezel plastic component.

First of all base face is extracted and point is created at the center of extracted face.
Intersecting curves are created of Class-A surfaces.
Bisecting line is drawn between the two side faces.
Thus we get the tooling direction in Y-axis.

Similarly tooling direction is created in X-axis

Intersecting curves are created of Class-A surfaces and line is drawn from the center point at 6 degree angle from the side face.

Bisecting line is drawn between the tooling direction lines of X and Y axis. Thus we have created the final tooling direction.

Draft Analysis of Class-A Surface :-

B-Surface :-

Class B-Surface is extracted from the A-surface and it is offsetted by 2.5mm in downward direction.

C-Surface :-

C-Surface connects the class A-Surface and B-Surface. It is created using Sweep command. Boundry of the class A-Surface is swept along the tooling direction.

Trim Surface :-

A & C-Surface are joined together then it is trimmed along the B-Surface.

Final Solid Body :-

Draft Analysis :-

Draft analysis is performed based on color ranges identifying zones on the analyzed element where the deviation from the draft direction at any point, corresponds to specified values. Minimum draft angle is considered as 3 degree.