Week 9 - Project - A pillar Design with Master Section

Aim : A pillar Design with Master Section

Objectives:

• Creation of Tooling axis with appropriate draft angle.

• Creation of other surfaces (eg, B and C surfaces) for creating a solid component. • Perform Draft analysis on Class A surface and Solid model hence created.

Draft

The draft is the amount of taper for moulded or cast parts perpendicular to the parting. line. Draft angles are a design consideration that makes it much easier for a part to release cleanly from a mould. A draft angle is calculated as a degree measurement (or, less often, an inch or millimetre measurement) from the vertical axis of a mould, and it helps account for thermoplastic shrinkage, a practical reality of the injection moulding process for most materials.

Draft angles are generally a requirement of injection moulding design (though there are a select few soft materials, like nylon, that can get away with draft angles of zero). The draft should be a part of the design for manufacture, and all stakeholders and contributors should be aware of its need at the outset of the design process. This includes product designers, design engineers etc and this allows considerations for design requirements to be taken into account. Any draft is always better than no draft.

Importance of Draft:

By accounting for thermoplastic shrinkage during the cooling process, draft angles significantly reduce friction between the finished, cooled part and the side of the mould, Not only does this create a much easier release process, but it also offers several other benefits, depending on the design of the part which is as follows:

• Reduces the chance of damage to the part due to friction during the release.

• Reduces wear and tear and chances of damage to the mould.

• Ensures a uniform, smooth, unscratched finish when required. • Ensures the integrity and uniformity of other surface finishes and textures.

• Reduces overall cooling time by lessening or eliminating the need for unconventional ejection setups.

• Most, if not all, of these benefits, offer either direct or indirect overall production cost reductions.

Procedure for creation of Solid model:

Class A Surface-

Class A Surface is the asthetic sutface that is created through scaning of clay model. This Class a Surface is a input CAD model for part design.

Class B surface-

Class B surface is created in a certain distance according to the thickness of the part. Class B Surface contain all engineering compoonent.

Class C Surface-

Class c Surface joins the Class A & Class B Surfaces.

C is where the doghouse contacts the back side of the surface

• Create closed body

Tooling Axis creation:

with reaspect to master Section creat Tooling Axis

DRAFT ANALYSIS

CLASS A SURFACE

FINAL BODY

Picture of the sketches with Sketch solving status

Picture of the 3D CAD

Picture of the Detailed tree structure.

FINAL BODY