Week 9 - Challenge 3 - Bumper

AIM

Create the Bumper Plastic component through the given Class-A surface. To begin with, the tooling axis for the given Class-A Surface should be created meeting the requirements of the draft angle and at the end perform the Draft analysis on the model.

Take the Thickness of the component to be 3 mm

Objective

• To create a tooling direction.
• To perform draft analysis for given A-Surface and prepare the final close body.
• To design the Bumper plastic component by creating the B-Surface and C-Surface using the given Class-A surface.
• Take the Thickness of the component to be 3 mm.

Introduction :

The input of the product designer is in the form of the A-class surface. The job of the product designer is to create the B and C surfaces keeping all the aspects for the mold.

Class A Surface is

1. Visible surface and aesthetic look.
2. Surface with textures.
3. Surfaces provided by customer(OEM).
4. Don't have any features like(rib, snap, bosses, etc) on class A surface.
5. Class A surface is made from scanned data with different software like alias etc.
6. Surfaces which are having CURVATURE CONTINUITY IS CALLED class-A.

Class B surface is

1. Invisible Surfaces.
2. Surface mostly don't have textures.
3. Surface needs to be created according to the class-A surface.
4. Having all features(Rib,boss,snap etc) in B-side surface only.
5. Surfaces which is having TANGENT CONTINUITY IS CALLED class-B.

Class A Surface : Check the connectivity of the Class A Surface Ensure that there is no gap between the component, using join command. We can visually check it or by clicking boundary command. It has a boundaries outer. Therefore first check completed.

Below fig 1 shown the given A-class surface.

Fig 1.

The given A-Surface having No gap as above fig shown. Hence boundary generated at the edges.

Procedure :

Tooling Direction for Plastic Part : Tooling direction is main consideration for plastic part and mold parts because it defines movement of mold part and possibility of plastic part to come-out from mold part (Core and Cavity).

• In Molding machine arrangement is given to open the mold along a direction which is known as Tooling Direction.
• In other words. The mold is built from two separate halves (Core and Cavity) and tooling direction basically define the direction of mold pulls apart.
• Tooling direction is known as primary direction.

Preparation of Tooling Direction

While creating the tooling direction in given class A surface. Chose the one suitable Base and Side wall and draw the line direction of axis. as shown the below fig 1.1.

Below fig 1.2 shown the A-Surface Draft analysis.

CLASS B SURFACE - For making a Class B surface we have to take 3 mm offset with A surface and close the all open patches by extrapolation and trimming function the final B surface is shown below- CLASS C SURFACE - For making a class b surface we have to use the Sweep command with reference to the surface and tooling axisFINAL TRIMMED SURFACE - For this first, we have to join Class A and Class C and trim it with Class B.

DRAFT ANALYSIS OF FINAL TRIMMED SURFACE -

FINAL BUMPER PART -

TREE STRUCTURE - Conclusion : The Bumper is created with consedering all Design Methodology.