Week 8 - Challenge 6 - Core & Cavity Design

Objective: The main objective of this challenge is to design a Core and Cavity for a Switch Bezel' in CATIA V5 with the help of a surface workbench.

Before we design the core and cavity, we should perform a draft analysis on the solid part body of the switch bezel.

Core Design:

Initially, I have taken the boundary of the class A surface to extrapolate it. After extrapolating the class A surface I trimmed extrapolated class A surface and class C surface (join of class A and sweeped surface), after I trimmed the class B surface with Trim.5 to create the 'Parting surface'. Now I draw a rectangle, which does not exceed the boundary of the parting surface.
Now I extruded the sketch along the tooling axis, after extruding the rectangular sketch I trimmed both the parting surface and rectangular extrude to remove the lower side of the parting surface. I filled the upper surface to make a closed surface by joining the filled and trimmed surface. Now I make the closed surface into a solid body, the obtained solid part body is our CORE bock.

Extrapolated class A surface:

Trimming the class C surface with extrapolated class A surface:

PARTING SURFACE:

Cavity Design:

To create the cavity block, I trimmed the rectangular extrude with a class B surface to remove the surface which is the upper side of it. After that, I filler the surface which is opened, to make a closed surface by joining both trim and filled surface. Now create a solid body from the closed surface by using the closed surface. The obtained part body from the closed surface is our CAVITY block.

Trin for Cavity block:

Cavity block:

Closed surface

Parting line:

• It is the line where the core and cavity intersect each other.
• The parting line lies on the B surface of the Plastic component to protect the A surface from the splash.

Parting Surface:

• The surface where the core and cavity meet each other is called the Parting surface.
• The Parting surface also lies on the B surface side.
• The below screenshot shows the surface in pink color which represents the Parting surface and the green line represents the parting line.
• We can clearly see that the parting line and the parting surface are lying on the class B surface.

CONCLUSION:

Thus, by following above method, the core and cavity of the bezel switch is made.