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Ethan Sobkowich

Winnie Lin

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generally rectangular sections that are 25 mm x 100 mm x 1.6 m-

Overall To-do: -apply feedback to the confluence, detailed and clear manufacturing plain

Designed by: Ethan Sobkowich, Yanshen Zhou, Winnie Lin

...

  • Maximize number of specimens that can cure at the same time

  • Can be machined in-house

  • Minimize time required to manufacture

  • Maximize adjustability to different size

  • Minimize costs for materials and manufacturing

-constraints: needs, functional, non-functional

*can organize into checklist

Testing between:

  • Steel to steel

  • Composite to composite

  • Steel to composite

...


Parchment Paper

Wax Paper

Saran Wrap

PFTE Tape

Feasibility

  • Can be found in most retail/grocery stores


10/10

  • Can be found in most retail/grocery stores


10/10

  • Can be found in most retail/grocery stores


10/10

  • Can be found in hardware stores

10/10

Ease-of-use

-non-functional req. (use survey to evaluate)

  • use sheets to cover exposed areas

  • some openings will need to be taped up

7/10

  • same as parchment paper

7/10

  • cling wrap does not need tape

  • works fine

9/10

  • needs to be taped on to all exposed surfaces 

6/10

Effectiveness

  • epoxy peels off easily

9/10

  • slightly worse than parchment paper


8/10

  • same as parchment paper

9/10

  • epoxy needs to be chipped off of tape

  • stickage may occur

5/10

Affordability

12 in X 75 ft $4.99 CAD @ Canadian Tire

75 in

$4.49 CAD @ Canadian Tire

25 m

$1.79 CAD @ Canadian Tire

½ “ X 480”

$0.79 CAD @ Canadian Tire

Maintenance

Remove tape and paper after each use


7/10

Remove tape and paper after use


7/10

Remove wrap after each use

8/10

Can reuse multiple times

9/10

Source: https://www.youtube.com/watch?v=uLH1MsaHnX4  

-create eng. design spec. chart

Characteristic

Relation

Value

Units

Verification Method

Comments

Production Cost

<

50

CAD

Analysis

Keep track of materials receipts

Mass

<

8

lbs

Test

Weight the tray and all ladders on scale

Ease of Use

>

80%

N/A

Test

Ask users to rate ease of use out of 10. Take average rating

-define effectiveness

Overall: Saran wrap is the best material to use due to its ease-of-use and effectiveness. It is also one of the more affordable options and is easy to maintain.

-other factors: interference with test specimen (wrap thickness)

Assembly Procedure 

Step 1: Printing

  1. Use PrusaSlicer to print 2 CAD models an array of support pieces on the same tray. The follow CAD files are to be printed in this step: one with three sides of a rectangle and one with a remaining, detached side of the triangletray. Two of the longer spacing supports are required per specimen and 3 of the spacing supports are required between two specimens.

    1. You may need to change the dimensioning of the support beams to customize it to your specimen.

    2. Print according to the number of specimens that are cured.

  2. Remove the printed pieces and print multiple support beams.

Step 2: Machining Cover

Step 3: Anti-stick Solution

Tray

  1. Cover the inside of the tray with saran wrap

  2. Press down on the inside edges and corners to try and flatten the wrap as much as possible

  3. Trim excess saran wrap off the sides of the tray if needed

  4. Tape down sides of saran wrap to the outside of the tray to prevent movement of the wrap

...

  1. Place saran wrap on the flat surface where the curing fixture will sit. Tape down saran wrap to surface.

Spacing supports

  1. Double wrap ladders supports with saran wrap

  2. Tape off loose ends 

Step 34: Placing Specimens in Place

  1. Align first specimen in a corner with the longer side of the specimen touching the shorter side of the curing fixture.

  2. Wedge a support fixture along the specimen to hold the individual pieces in place. Correct placement shown in fig. 4.

    Image Added

    Figure 4: The adhesive specimen is shown in blue. The support material is coloured in orange and labelled. They hold pieces on the same level in place.

  3. Place two three support fixtures pieces perpendicular to the first specimen at each joint to provide support for the next one. Continue placing specimens down until the tray is full or until you are satisfied with the number of specimens. If the tray is not full, wrap a flat piece of wood in saran wrap and place it flat against the last specimen. Put a weight behind the piece for support (i.e. a piece of steel, a block of MDF, a rock, etc.)

  4. Place a flat board on top of the tray and specimens. The flat board should also be wrapped in saran wrap. Place a weight on top of the board.

Bill of Materials


-pictures with assembly

Item

Amount

Description of Use

Supplier

Total Price

1/8” Fiberboard

2 square ft.

Material for laser cutting. Creates tray.

UW 3D Print Centre

$4.00 + tax

ABS Printing Filament

Support material in between specimens and within specimen pieces.

Amazon (if no sufficient supply in Bay)

$30.88 + tax

Saran Wrap

900cmx30 cm

Prevents epoxy from curing to the fixture.

Walmart

$4.00 + tax

3mm Birch Plywood

20cmx30cm

Applies pressure from the top of curing fixture

E3 Machine Shop

$0.81 + tax

-bill of materials w/ quantities + descriptions

-some explanation for procedure (decision behind assembly process; why?)

Material Specifications