Project 2

CPU Fan Bezel

Commands Used

1. Line
2. Rectangle
3. Circle
4. Trim Entities
5. Convert Entities
6. Offset Entities
7. Mirror Entities
8. Linear sketch pattern
9. Circular sketch pattern
10. Extrude boss/base
11. Extrude cut
12. Hole Wizard
13. Fillet
14. Draft
15. Lofted surface
16. Offset surface
17. Ruled surface
18. Delete face
19. Extend surface
20. Knit surface
21. Cut with surface
22. Draft analysis
23. Move face
24. Scale
25. Parting lines
26. Shutoff surfaces
27. Parting surfaces
28. Core
29. Move/copy bodies
30. Combine
31. Insert component
32. New part

Component:

Checking Draft Analysis:

Draft analysis Examines the faces of the model for sufficient draft, to ensure that the part ejects properly from the tooling. By using draft analysis we check if there are any missing drafts in the model and do the necessary changes.
Minimum Draft angle is 0.5 degrees.

Scaling:

Depending on the material, the part will shrink when cooled after molding. Therefore our mold needs to be a little larger than the original so we will scale up our part.
Assuming the material for the model as ABS (shrinkage - 0.6%), the scale value is determined as (0.6/100)+1=1.006 for the model.

Parting Line:

Now we need to separate the model into core and cavity. for this, we use the parting line command.Parting lines are made to separate into core and cavity.

Shut off Surface:

We can observe that there are few openings in the part. we have to cover these parts before creating the mold. For this, we use the shut-off surface command. All the opening holes are covered using a shut-off surface.
Shut-off surface Creates surface patches to close up through holes in the molded part.

Parting Surface:

The parting surface is made along the parting line to separate the core and cavity blocks.

Cavity Surface

Core Surface

Cavity Block:

By using Cavity surface cavity block is created

Core Block:

By using core surface core block is created

Sliders:

There are some Features provided at the Corners of the components those features will not satisfy the core and cavity block movements so that we need to provide sliders

Slider 1:

Slider 2:

Slider 3:

Slider 4:

Bolts and Washers:

Provided Bolts and Washers for the Guides in the core block

Ejector pins and Ejector back plates:

As the part needs to be ejected form the core block after the injection process, we should design ejector pins such that the ejector pins will be pushing the part with the help of ejector and ejector back plate. The heads of the ejector's pins are made based on the type of ejector pins, as the ends of ejector pins which will be in contact with the part to be ejected are in angled manner (Type-2) the heads of ejector pins should be in “D” shape.
After the design of ejector pins relief for the ejector pins should be provided both in core block and the ejector back plate.

Ejector Pins:

Ejector pins are created for ejecting the components when the core block move away from the cavity block after the part solidified

Ejector Plates:

Cavity and Core Blocka are edited according to the parts

Sprue, Runner and gate system:

Sprue is a channel through which metal or plastic is poured into a mould trough this the molten material will be passed through the gate through runner system which will connect the sprue and gate, gate is a channel which will connect the runner and mold cavity.

Cooling Channels:

Cooling channels are required to provide uniform cooling for the part to avoid defects during solidification for this we need to provide inlet and outlet ports for the coolant to pass through the core block.

Air Vent:

Air vents need to be designed for the mold for removal of trapped air in the blocks for this a gap of 0.02mm will be provided on the core block with a way for the air to be passed out the block.

Avoided Rubbing Surface between cavity and core block