Week 8 - Challenge 4 - Coin Holder Design

COIN HOLDER DESIGN

OBJECTIVE: To perform draft analysis to check if the part has the given draft on its all faces, to determine the tooling axis and design component using the class-A surface as a reference.

DRAFT: Draft is a tool used in CATIA to make the faces taper with respect to the tooling axis. Tooling Axis is the direction of mold part ejection.

Why draft is necessary?

When developing parts for plastic injection molding, applying draft (or a taper) to the faces of the part is critical to improving the moldability of your part. Without it, parts run the risk of poor cosmetic finishes and may bend, break, or warp due to molding stresses caused by the plastic cooling.

Draft Ange Recommendations:

• 3° is Nominal Draft.
• 0.5° is a minimum draft which increases the cost of manufacturing.
• 7° for Textured Faces.

Procedure:

Tooling Axis:

B Surface:

Side Walls:

Base:

Top Wall:

Initial Trims:

Outer Flange:

Class C Surface: