Week 8 - Challenge 6 - Core & Cavity Design

OBJECTIVE

Create the Core and cavity blocks for the switch bezel design.

TOOLING AXIS

Tooling axis is the direction in which the mold and cavity opens and closes in the injection molding operation.

PROCEDURE TO CREATE TOOLING AXIS

1- Creation of 1st Bisecting Line

• We have created an intersection and taken the reference line of that intersection
• Then we have drawn two line on the reference line of the part. Make sure the two lines are coincide with the intersection line
• We have created bisecting line using these two line and the center point as shown in the below image

2- Creation of 2nd Bisecting line

• We have created an intersection and taken the reference line of that intersection
• We have created two line on that reference line of the part
• We have created a line from the axis point with the angle of 5 deg.

3- Then we have created a bisecting line using 1st and 2nd bisecting line and the center axis point that line will our TOOLING AXIS.

DRAFT ANALYSIS

Draft analysis is done to know wheather the part will be easily manufacturable by the given draft angle or not. It will ensure that the part will not stuck in the core and cavity.

PROCEDURE TO PERFORM DRAFT ANALYSIS:-

1. Right Click on Tab < Go to Analysis < Feature Draft analysis
2. Put the View Mode in material option
3. Align the compass with the tooling direction line
4. The surface will turn into green colour it means the part is manufacturable with the given draft angle.

PARTING SURFACE

The parting surface is the surface of the mold that is perpendicular to the parting line. The purpose of the parting line is to separate the two halves of the mold so that the molded part can be ejected by the ejector pin.

PARTING LINE

A parting line is a line that divides the mold into two parts – the core and the cavity.A parting line in the industrial casting of molds,is the border line in which draft angles change direction.

The red coloured dotted line is the parting line on the below image

CORE AND CAVITY DESIGN

CORE DESIGN

The core is the male part which forms the internal shape of molding. This is the side of the tool where the plastic part is injected from.

1- Create a sketch of a block

2- Extrude it on both side

3- Trim the extrude with the parting surface

CAVITY DESIGN

The cavity is the female part which forms external shape of molding.

1- Extrude the sketch of block which is created while the core design

2- Trim it with the class b surface

FINAL IMAGE