Challenge

Week 8 - Challenge 6 - Core & Cavity Design

VVenkatesh Karunamoorthy30 Sept 2022

DESIGN AND DRAFT ANALYSIS OF CORE & CAVITY OF SWITCH BEZEL

Class A of Switch Bezel

Draft analysis

Draft analysis is done to check plastic parts moldability for the ease of removal from the injection mold. A tooling direction is required to create the draft in the component, which acts as the drafting direction.

Tooling direction

Considering the ejection from the cavity of the mould after manufacturing the interior trim must have the nominal 3-degree draft angle (minimum).
Hence the tooling direction is created by considering the above factor and bisecting method is used.
The base surface of the class-A was extracted and a point at the center is created and an axis system was inserted to the point.
Then intersection of the Class A & yz plane is created and the two inclined lines were drawn. Then bisector line of the two inclined lines is created.
Now the same procedure is done along the xz plane, then a line is developed at an angle of 5deg to the line of intersection of the plane and surface.
With these two developed lines, a new bisector line is created and published as tooling axis.

Switch Bezel part

Parting Surface

Parting Line

Core for Switch Bezel

Cavity for Switch Bezel

Core & Cavity with Switch Bezel

Mold Cavity Cross section

Procedure for Draft Analysis

The draft analysis tool is selected.
Then by enabling compass the axis system is aligned in line with the tooling axis, to define the draft direction.
Now the surface or part which should be subjected to draft analysis is selected.
Lock Direction is applied that fixes the compass and then the mode dialog box is formed by snapping at any point on the part
The Color Codes are classified and Draft Angles are applied
Then the Running point analysis is used to hover around the part to analyze the permissible draft angles and the analysis is saved.
This gives the result of the surfaces which have positive draft in green code.

Draft Analysis of Switch Bezel Class A