Week 10 - Challenge 1- Attachment Feature Creation (Ribs & Screw Boss)

Door handle,Ribs & Screw boss Design

Aim:

To design the Door handle plastic component by using A surface and create the ribs and screw boss by using design rules and the do the draft analysis on Door handle.

Objectives:

· Create a tooling axis by using intersection lines.

· Creation of class B surface by using extract and offset.

· Creation of class C surface by creating sweep from A surface and extrapolate from B surface.

· Creating a solid part by using of close surface.

· Creation of screw boss and ribs with design rules.

· Draft analysis of Door handle.

Introduction:

A Door handle is used as a structure to operate the door. Every plastic components have a A,B,C surface. A surface is the basic surface. By using the A surface only, we can design the plastic components. B,C surface creating only by using of A surface. Tooling axis is very important to design a component. For draft tooling axis is essential. For C surface creation from B surface the sweep created by use of tooling axis. Ribs are thin wall-like structures that add support and rigidity to injection molded parts. They are thinner than primary walls and are used to support these walls, as well as bosses, by running perpendicular to these structures.

Parameters:

Thickness of component -- 2.5mm

Draft angle of component – 3^o

Class A surface:

This picture shows the class A surface. First, we need to check the boundary. If it is not okay, then A surface needs to be modified.

Tooling Axis:

Tooling axis needs to be created by using of A surface by using intersection lines by bisecting method.

Draft Analysis of Class A surface:

Draft angle – 3deg.

Class B surface:

This picture shows a class B surface. This was created by extract and offset the A surface and splitting the extract surface. Finally extrapolate the component for making closed sheet to make solid.

Class C surface:

This picture shows the class C surface. This was created by use of creating sweep from A surface and trim with the B surface.

Solid Door handle Component with ribs & screw boss:

Ribs design rule:

Screw boss design rule:

Draft analysis of a Door handle: