Week 8 - Challenge 6 - Core & Cavity Design

CORE AND CAVITY DESIGN

AIM:

Create the Core and cavity blocks for the switch bezel design. And also create the parting surface and parting line to identified where the parting area of the part will occure.

CORE AND CAVITY DEVELOPEMENT METHODALOGY:

PARTING SURFACE:

The parting surface of a mould are those surfaces of both mould plates adjacent to the impressions which butt together to form a seal and prevent the loss of plastic material from the impression. The parting surfaces of a mould are those portion of both mould plates, adjacent to the impressions, which butt together to form a seal and prevent the loss of plastic material from the impression..

PARTING LINE:

A parting line, in the industrial casting of molds, is the borderline in which draft angles change direction. That is, it is the dividing line that splits the core and cavity halves of a molded part. It is sometimes a starting point for the mold parting surface.

Here intersecting the parting surface, core, and cavity across the ZX plane gives the intersecting line that tells the parting line.

CORE DESIGN:

The core design is started with extracting the parting surface that becomes the datum for the core and cavity. The parting surface in most of the cases is kept at the B class surface to avoid close and tight contact between the core and cavity.

At first, the A-class surface is extrapolated with some length and later it is trimmed with a C surface.

Now, the final core block is made by drawing the boundary sketch and extruding it along the tooling axis direction followed by the filling and thickening.

Closed surface as shown in the below pic.

CAVITY DESIGN:

The cavity is the part where the injector and filling of the molten plastic happens. The cavity block is prepared by first extruding the outer boundary along the tooling direction.

This outer surface is trimmed with the B class surface and then it is filled and thickened.

It's closed surface,

CONCLUTION:

Core and Cavity blocks for the Switch Bezel have been successfully created.