Challenge

Week 8 - Challenge 6 - Core & Cavity Design

RRamakrishnan M23 Sept 2022

DESIGN

Core & Cavity Design for switch bazel

OBJECTIVE

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

INTRODUCTION

Core and cavity is another name of Mould pattern it is using for produce the component by using injection moulding so we need core and cavity based on the components design.

DESIGN CONSIDERATION

Class – A surface are created on all visible exterior surfaces using alias.
Class – B surface have engineering feature like ribs etc.
Class – C surface should be pass on draft analysis.

Core & Cavity Design steps

1) Parting surface

2) Core

3) Cavity

4) Parting Line

Parting surface

Fig.1.1 Parting surface

The parting surface was trimmed with an extrude (with reference anlge of tooling axis) of a rectangle that enclosed the component design that resulted in creation of core block.In industrial casting of molds, is the border line in which draft angles change direction. One can check the parting line in the mould or product which divides the two half the core and cavity of a molded part. It is starting for molding parting surface.

Core

Fig.1.2 Core

Create a sketch with rectangular shape which should not exceed the trimmed surface.
Extrude the sketch along the tooling axis and trim it with the other surface.
Select the boundary and close the extruded surface using fill command and the final surface is created
Go to part design create solid surface using the close surface feature

Cavity

Fig.1.3 Cavity

The CLASS B surface was trimmed with an extrude of rectangle along the tooling axis.

Parting Line

Fig.1.4 Parting Line

During the injection molding process, the core and cavity blocks are pressed tightly and form a sealed hollow mold cavity, the pressed surface is called the parting surface. In other words, it is a surface that separates the mold block into two parts – the core and the cavity.

Parting Line Creation

Fig.1.5 Parting Line Creation

MOULDING WAY

Fig.1.6 Moulding way

CORE & CAVITY IN VARIOUS VIEWS

The Mould Core & Cavity are the two halves of the mold where the hot materials is injected into the core and cavity and the gap between the core and cavity is filled with the hot molten materialduring the injection moulding process and then hardened into the final shape.