Week 8 - Challenge 6 - Core & Cavity Design

AIM

Create a Core and Cavity for the existing Switch Bezel design and Show Draft Analysis using the existing Tooling Axis.

OBJECTIVE

• Create Parting Surface and Parting Line for Switch Bezel.
• Create Core And Cavity Blocks.
• Show Draft Analysis Component with the Core and Cavity.
• Make Solid a Body Using the Close Surface Feature from the surface.
• Use Publications.

CORE AND CAVITY

CORE:

• A movable side mold made the convex shape.
• The mold closes the cavity and the core can make the geometry of the combined product.
• The resulting space is called a cavity.

CAVITY:

• Molten plastic enters the fixed side mold and its made a concave shape.
• Mold cavity referred to having the cavity mold tooling.

METHODOLOGY

STEP-1

Open the existing Switch Bezel CATpart.

The below image is of Draft Analyzed Switch Bezel CATpart.

STEp-2

Show Class A Surface In that CATpart.

Perform boundary check on the Class A surface to ensure Class A is complete.

STEP-3

In this, we have to extrapolate the Class A surface for 15mm.

Then Trim it with Class C Surface.

STEP-4

PARTING SURFACE

- A Parting Surface is a surface that separates the mold block into two parts – the core and the cavity. Usually Parting Surface is the biggest projection outline of the part.

- To create it we have to trim the previous surface with a Class B surface as shown below.

Parting Surface

STEP-5

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.

- To show it create an intersection between the B surface and the Trimmed surface of A and C surface as shown in the below images.

Parting Surface and Parting Line Image

STEP-5

CORE AND CAVITY DESIGN

- Start sketching for the core and cavity as shown below.

- Now extrude the sketch using Extrude Surface command in both directions as shown in the image.

- For Cavity trim the Extrude surface with B surface.

- Now for the Core trim the Extrude with Parting Surface with Component Area

- To fill the bottom half of the Core and Cavity first use Boundry Command to create a boundary.

- Then use the Fill command with a boundary as a reference to fill the gap for both Core and Cavity.

- After that use the created surfaces and trimmed Core & Cavity surfaces in the Join command for creating closed surface blocks of Core and Cavity as shown below images.

Core Image:

Cavity Image:

Core & Cavity with the Parting Surface, Parting Line, and the Component Area in the below Images:

STEP-6

Create an intersection to show the Gap where the Component is Molded as shown below.

STEP-7

- Now create a Solid Block of Core and Cavity using Closed Surface in the below images.