Challenge

Week 8 - Challenge 6 - Core & Cavity Design

RRajesha Dn4 Jan 2023

Challenge-26 CORE AND CAVITY DESIGN

Aim:

To create the core and cavity for the switch bezel considering the alldesign rles.

Tooling Axis :

It is the Axis in which the direction core and cavity open. This is the very important for production of plastic component. Most of the Defect will done improper Tooling axis creation by the plastic designer.

There are so many methods for creation of Tooling Axis. Intersect is the one of the method for creating the Tooing Axis.

BYSECT METHOD:

For doing this you shoud find out the what is the best tooling direction. Foe doing that to rotate the part and see al directions and choose the which direction will be comfortable.

Then create the point on the base mostly create the point where the hole or pockets are given and after that insert tooling axis in that point. Then first see in X direction it ill clear the all faces of parts if not create plane and intersect to each other the following window will be appeared.

The create the mean line. and go to Y direction and do the same process we are done in X direction.

Then Bysect These all linest to get the main Tooling Axis can be cleared all faces of the part.

Draft Analysis:

The purpose of DRFT ANALYSIS is to detect the parts should be eaisily withdrawl from the cre and cavityby using of different colour ranges.

This analysis will be done by DRAFT ANALYSIS command. for this command go to INSERT> ANALYSIS> FEATURE DRAFT ANALYSIS

These are following the steps to do the DRFT Analysis on Switch Bezel. First to click the DRAFT ANALYSIS command the following window wil be appeared.

And then change into material mode.

Then click the compass. and drag on the tooling Axis. and then click on the part then the colour will changes of the part. and also A running pint command used to findout the angle of part from the tooling axis. so you can modify the tooling Axis so you can modify the tooling axis by using compass to get proper results.

Draft Analysis of Class A ssurface:

CORE AND CAVITY DESIGN FOR SWITCH BEZEL:

Core and Cavity:

A core is the one part of the mould and it is esponsible for half of the molded part. actually core is the projection of the body. these and cavity isthe depression of the body. these core and cavity is the depression of the body. these core and cavity combines to form a mould. then the plastic material injected into these mould to get a plastic part.

Parting Surface:

Injection mold has two major components one is core and another is cavity. during the injection molding process, these two halves are pressed tightly from a sealed hallow to acoid the melt flow leakage and maintain certain holding pressure, the pressed surface are called parting surface are the biggest projection outline of the part.

Design parting surface should follow the following principles:

Design the injection mold simple as possible avoide or reduce side parting as much as possible to reduce complexity of the mold making.
Ease of de-molding as far as posible, for instance the plastic parts should stay in fixed hale of injection mold and should ejected by ejection system avoid, side de-molding action,
Ensure apperance requirement of molded parts, try to make the parts similar dimension accuracy requirement in same mold to reduce manufacturing and assembly errors.
Ensure apperance requirement of molded parts, finish or mismach usually ocurs on parting surface, so the parting surface should not be designed on high quality requirement surfaces.
Ensure adequate venting. if possible parting surface should be place at the end of the mold flow. This is going to be advantages of filling and venting.

Parting Line:

It is the area in which parting surface and component meets or it is a junction between core and cavity. and the parting surface has some set of rules becouse the product quality mostly depends on thwe parting surface.