Week 8 - Challenge 4 - Coin Holder Design

COIN HOLDER DESIGN:

AIM:

The aim of this project is to create a Class B surface and Class C surface by using the given Class A surface and perform the draft analysis.

DRAFT ANGLE IN PLASTIC:

Draft is the providing angle or tapers on product feature such as walls, ribs, posts and bosses that lie parallel to the direction of release from thmold eases part ejection.

for doing the draft analysis, a tooling direction is required.

DRAFT ANALYSIS TOOL IN PLASTICS:

By using draft analysis tool, it identifies the zone (using colour code) and highlights the area which deviates from the specified values along a defined draft direction.

PROCEDURE FOR DRAFT ANALYSIS:

1. Set the customised rendered style
2. Select the draft analysis tool
3. Adjust the draft direction to molding axis using compass
4. Observe colour range

Green colour for draft angle less than 3 degrees

Red colour for draft angle less than 0 degrees

Blur colour for draft angle 0 to 3 degrees.

• 3 degrees is for nominal draft
• 0.5 degrees can be manufactured at ribs
• 7 degrees for textured faces

Steps involved to find draft analysis on given Class A surface of the coin holder:

By observing the given Class A surface, extract the base surface and create line in the mid surface along z direction. and the line is stated as tooling axis.

CLASS B SURFACE:

Extract the base surface. after that untrim and extra polate objects.

Extract the side walls surface and after that untrim and extra polate the obhects and offset it to 2.5mm.

Extract the top walls and untrim and extra polate the objects and offset to 2.5mm

Untrim the three surfaces which created and keep it as a base surface.

Extract the outer surface and trim it to get required surface.

Join the two surfaces to get desired ouput and fillet the sharp corners.

CREATION OF CLASS C SURFACE.

for the closing surface in the bottom part use sweep comand with the boundart created after joining the surface.

Untrim with all the surfaces and make it as Class C surface.

Closed surface:

Expanded Tree:

DRAFT ANALYSIS:

CONCLUSION:

by using the Class A surface, Class B and Class C surface has created and draft analysis has done.