Week 8 - Challenge 6 - Core & Cavity Design

AIM:

To create the Core and cavity blocks for the switch bezel.

Introduction :

Core and Cavity:

Core and cavity are the each half,which shape defines the final part ejected from mould,in which one half is fixed and other is moved and the part is ejected, usually the moving part is called core and the fixed part is called cavity. depending on the shape of final product, side core is added.

in the above image the hemisphere is the final shape and that shape is provided in core tool.

The thickness of the part and clearences is considered while designing the core and cavity.

for this design we have considered the part thickness as 3mm.

Objective:

To create

• Tooling Axis
• Switch Bezel Solid / Surface body
• Parting Line and Parting Surface.

Class -A surface :
The class A surface has been provided and the tooling axis has been created considering the manufacturability of parts and the draft analysis is performed in the part by creating the tooling axis.

Tooling axis:

The tooling axis is created with normal to surface.

Class B surface:

The class B surface has been created from the provided class A surface by offset method and the thickness is considered as 3mm as spec.The edges of the same has been extrapolated as it should be trimmed with C surface.

Class C -surface:
The class C surface has been swept with the boundaries of class A surface, as its the base. and all the swepts has been joined together.

Final part :

The class A&C surface is being trimmed off with class B surface, and checked for boundary,to check for any discontinuity then again the draft analysis is performed and evaluated and found okay then the part body is created using close surface.

CORE TOOL:

The core tool is created from the extract of Class-A and the same is outer dimensions are extruded and formed a solid body.

Cavity:

The cavity is created similar to core and formed as a solid body.

Parting LIne and parting surface :

Parting Line : Parting line is the edge line formed in the mating region of core and cavity.
Parting surface: parting surface is the surface where the core and cavity meets and forms the part.

Tree structure:

Draft analysis of Final Part:

Various views of Core and Cavity Blocks:




Result:

The core and cavity has been designed for the switch bezel successfully.