Bookmark Ghost

Summary

Use this ghost as a bookmark next time you read a book. You can not only enjoy having a nice ghost with you but also not forget where you left off reading the book. Our team, Alyssa and Annie designed this ghost with “perfect” dimensions “6.5cm” x “3cm” which provides you with an aesthetically pleasing bookmark that can be carried anywhere, anytime. Share this ghost with your friends and get 15% off!

How we designed this

• Firstly, we made a sketch of the ghost on a piece of paper. 

• Then we made the sketch on Solidworks, we altered the design at different places for a more aesthetically pleasing ghost. 

• We saved the file as STL and sent them out to 3d print. 

Construction instructions

1. We first made a constraint box moving off of the origin (only with construction lines) (origin at the top left corner of the box).
2. Added reference geometry (construction lines) to mark the bottom of the triangles, the center of the eyes, the origin of the mouth (the bottom big circle), and the origin of the circles on the bottom.
3. Created the top using 3 triangles.
4. Added dimensions and set each of the triangles equal to each other.
5. Lines along the previous construction lines mark the length of the ghost for the border.
6. Set the origin of the eye and create a circle (I cm from the construction line of the top triangles).
7. Added dimension for the diameter(0.5cm).
8. Added dimension from the origin of the circle to the left side of the ghost construction line (0.8cm). Create a construction line from the top of the constraint box to the bottom in alignment with the origin of the eye (2.3).
9. Added lines to extend the sides of the mouth (continuing 0.3 widths).
10. Made lines vertical and parallel to each other.
11. On the top of the mouth, used a tangent arc to connect the previous parallel lines.
12. Created bottom left circle from preexisting box construction lines, making a dime.
13. Dimensioned the circle’s diameter to 1 cm and from its origin to the bottom construction box line 0.5cm.
14. Selected the entire sketch and went to mirror, then selected the middle construction line for mirror about.
15. Created a circle in between preexisting bottom circles. 
16. Selected all three construction lines (0.5 cm above the bottom construction box which goes through the origins of the circle)  and cut off the top of the three bottom circles.
17. Set the sides of the ghost so that they are equal, parallel, and vertical.
18. Created a small circle to connect the inner portion of the mouth.
19. Offset the circle to connect the outer portion of the mouth (0.3cm offset).
20. Used the trim tool to erase the circles' unnecessary portions(top half).
21. Extruded out the ghost.
22. Then we wrote out initials on the ghost.
23. Fine-tuned the ghost.
24. At last, we saved it as an STL file and printed them using 3d printer.

Changes we made

• At first, we used a circle to cover the top of the mouth of the ghost. But this didn’t work, so we used a tangent arc instead.

Reason - The half circle was blue, which means it wasn’t fully defined when we used the circle tool instead of the tangent arc. So, we had to change our plan a little.

• In our sketch, the distance from the left border to the origin of the eye was 0.75cm, but we changed this on Solidworks to 0.85cm.

Reason - It was an aesthetic change, moving to a little right made more sense.

• Changed the length from the top of the ghost to the bottom of its mouth from 5.4cm to 5.5cm.

Reason - It was an aesthetic change, having a little less space between the bottom of the mouth and the semi-circle made more sense.