Week 8 - Challenge 6 - Core & Cavity Design

AIM :

To create the Core and cavity blocks for the Switch Bezel Component.

OBJECTIVE :

• To Create Core, Cavity and Parting surface for the given component along the Tooling Axis.

CORE :

• Core is a preformed, bonded, sand insert placed into the mold to shape the interior of a casting or a part of the casting that cannot be shaped by the pattern.
• Core is the male part which forms the internal shape of molding.
• Cores are often used to create hollow sections or cavities in a casting.

CAVITY :

• Cavity is the combined open area of the molding material and core, where the metal is poured to produce the casting.
• The cavity is the female part which forms external shape of molding.

PARTING SURFACE & PARTING LINE :

• A Parting surface is a surface in the model that you designate to split a workpiece, die block, or another volume.
• A Parting line is the line of separation on the plastic part where the two halves of the plastic injection mold meet.

PROCEDURE :

Creating Tooling Axis:

• Initially the given Class-A surface was imported and checked for any discrepencies in the boundary.
• The base surface of the component was extracted.
• Two sketches were created based on the adjacent sides of the Class A surface.
• Finally a Tooling axis was created from these two reference lines using Bisecting option.

Creating Parting surface & Parting line:

• Initially the Class A surface was Extrapolated.
• It was then Trimmed with the Class C surface.
• This output was further trimmed with Class B surface along with the component.
• The Parting line was created as an Intersect with Class B with a Trimmed surface.
• The Parting surface was obtained by Splitting the Parting surface with component with the Parting line.

Creating Core:

• A Rectangular shape was formed and extruded along the tooling axis such that it stays inside the region of the Parting surface.
• This extrude was Trimmed with the Parting surface with component to form the Core part.
• The Core was closed at the top using Fill command and was further joined using Join command.

Creating Cavity:

• The Rectangular extrude was usde to create the cavity aswell.
• This extrude was Trimmed with the Class B to form the Cavity part.
• The Cavity was closed at the top using Fill command and was further joined using Join command.

Creating Solid Body:

• The Core and Cavity were made into a solid component using the Close surface feature.
• The Tooling axis, Core, Cavity, Parting surface and Parting line were published.

Draft Analysis:

• The Drafting analysis was performed using the Feature Draft Analysis command.
• Using this command the compass was set on the main tooling axis and the Draft angle was changed to 2.9 degree.

Feature tree:

CONCLUSION:

Created the Core and cavity blocks for the switch bezel designed in the earlier challenge.