Week 8 - Challenge 6 - Core & Cavity Design

Objective : To design Core and Cavity

The Draft Analysis command enables you to detect if the part you drafted will be easily removed. This type of analysis is performed based on color ranges identifying zones on the analyzed element where the deviation from the draft direction at any point, corresponds to specified values.

PARTING SURFACE :

Generally,injection mold has two major components : the movable halve and the fixed halve , during the injecction molding process, these two halves are pressed tightly from a sealed hollow to avoid the melt flow leakage and maintain certain holding pressure, the pressed surface are called parting surface , usually parting surface are the biggest projection outline of the part.

Parting bsurface design directly affects the product quality , ease of construction and opearation of the injection mold , the mold design is one of the key facctors to success.

DESIGN PARTING SURFACE SHOULD FOLLOW THE FOLLOWING PRINCIPLES :

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1. Design the injection mold simple as possible .Avoid or reduce side parting as much as possible to reduce complexity of the mold making.
2. Ease of de-molding as far as possible, for instance the plastic parts should stay in fixed halve of injection mold and should ejected by ejection system avoid , side de-molding action,
3. Ensure the dimension accuracy of the molded parts ,Try to make the parts similar dimension accuarcy reqirements in same mold to reduce manufacturing and assembly errors .

Step 1 : To etrapolate class A surface for 17 mm

Step 2 : trim class A with class c to get inside portion

Step 3 : Now, trim the B surface with with output of Class A & C that will be parting surface with resprect to area

Extrude the skectch overall throgh the tooling direction are trim it with parting surface.

Closed part body of the core design

Similarlly,Repeating the same as done for the cavity part and trim it on other side surface

- Intersection of parting body represented

- Translation of the component

Conculsion : Th design of core and cavity is thus done