Challenge

Week 8 - Challenge 4 - Coin Holder Design

AIM: To create a Solid COIN HOLDER from the given Class A Surface as Input.

OBJECTIVE:The objective is to create COIN HOLDER using Class A Surface along with draft analysis and following the OEM Design standards

INPUT CLASS A SURFACE:

SOLID BODY :

TOOLING AXIS CREATION:

Class A surface is first analysed for creation of tooling axis which tells about the direction of the mould or core and cavity slides.The tooling axis plays a vital role in the plastic design as there should be clearance between the tooling axis and mould.
The minimum of 3 degree draft angle is provided on the surfaces which are 90 degrees to avoid the Interference between the mould and Injection moulding machine.
Here in this CLASS A surface the side walls are having 0 degree, so here we drawn a centre line to the base surface and treated it as the TOOLING AXIS.
We need to interact with the class A surface designer and to inform whether it is possible to give a minimum of 3 degree draft on side walls.

CLASS B SURFACE:

CLASS C SURFACE:

DRAFT ANALYSIS:

Draft angle is nothing but the amount of the taper is provided on the core and cavity for ease ejection of the mould after cooling.
After Injection moulding the plastic parts shrinks and gets stuck to the core and it will make it difficult to remove the plastic part.
If no draft or taper is provided on the core and cavity the inner layers of the platic part will undergo wear and tear and there will be NO smooth surface finish.
The draft angle is provided on both the inner and outer walls of the core and cavity.
The Nominal draft angle is 3 degrees
The 5 degree draft can be given by the manufacturing cost will be more.
The 7 degree draft is given for the textured surface.

STEPS FOLLOWED FOR THE DRAFT ANALYSIS:

Here I have done draft analysis on both class A surface and final solid body.

Draft Analysis On CLASS A Surface:

Draft Analysis On solid body:

Ship work like this
in your own course.