Core & Cavity Design of Switch Bezel

OBJECTIVE

To develop the Core and Cavity of the Switch Bezel component.

WORKING

Core and cavity are the molding halves that give shape to the part to be molded.

Core	Movable Half of the Mold base. The geometry has Projections. Draft Analysis: Green
Cavity	Fixed half of the mold base. The geometry has Depressions. Draft Analysis: Red

PROCEDURE

STEP 1: DRAFT ANALYSIS

All the surfaces must pass in this analysis.

Insert > Analysis > Feature Draft Analysis

Note: Ensure you have the Material view mode ON.

• Define the Draft direction using the "Compass" option.
  • Drag the Axis system representation close to the model and align it along the tooling axis.
• "Lock" the Draft direction.
• Set the Colour scale

Colour	Description	Value
Green	Core Side	Above 3 degrees
Blue	---	0 degrees
Red	Cavity Side	Below 0 degrees

• Place the Analysis Tool (Arrow Icon) anywhere on the model and review the colours on the feature.
• If any feature is showing Blue/Red then choose the same option again (It will switch to Analysis under Running point) and place it on the respective feature to review the deviation of the sweep angle from the Tooling Axis.

STEP 2: BOUNDARY	Sketch the Boundary using Position sketch. This boundary will be the sidewallsINORE of the mold.
STEP 3: EXTRACT SIDEWALLS	Extract the Surface from the sketch. The direction of extract: Tooling Axis.
STEP 4: EXTRAPOLATE PARTING SURFACE	In order to Trim the Core and Cavity, we need to extrapolate the Parting surface. It is usually the B surface.
STEP 5: TRIM	Trom the Extrapolated Parting surface geometry with the Extracted Sidewalls.

RESULT

CORE: Has Projections and Features.
CAVITY: Has a Depression to accommodate the projection and features. The Parting surface separates Core from the Cavity.
Component to be Molded
Tree Structure