Page Comparison

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Figure 4 is an example of how the jig will clamp the test specimen. The green planks are aligned as seen in Figure 3. The main tray edges will be placed flat on a flat board or table. Then, a another flat board (like a piece of plywood for example) will be placed on top of the specimens and weights will be placed on top of the board to apply downwards pressure on the z axis (purple). The spacing between the When the tray is full of specimens and the brown rectangular jigs, seen in Figure 4, These boards are in place so that pipe clamps can apply pressure from the sides (red)y-axis movement will be restricted due to the packing of specimens an jigs. A sliding board will be on the edge and a pipe clamp will apply inwards pressure on the x-axis. The idea is that the blue square-shaped pieces will ensure that the test pieces line up properly under this clamping force. It is possible that more thin brown square pieces may need to be added in the middle section to ensure adequate restriction on movement. Nine of these specimens can must be lined up at once inside of this tray for proper usage.

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Fig. 4: Example of how specimen will be placed in tray

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1. Use AutoCAD to create layout of pieces that need to be laser cut. In total, this needs to include 4 copies of each component of the tray.

   1. The idea behind this is to stack four 1/8 inch thick pieces of fiberboard to create a 1/2 inch tall tray.

   2. Minimize the area occupied by the pieces. This is because the 3D Print Centre charges per square foot.

   3. All vector cut lines should be 0.00 units line thickness and all raster/engraving lines should be set to a minimum of 0.25 units.

2. Submit a laser cutting request: https://uwaterloo.ca/3d-print-centre/laser-cutting-request-form

   1. Turnaround time is 2-3 days.

3. Use wood glue to bond two copies of the same part.

   1. Apply a thin strip of wood glue along the entire piece.

   2. Clamp down both pairs of fiberboard pieces for curing. This takes 24 hours according to the glue manufacturer instructions.

   3. After the pairs of fiber board have fully cured, repeat steps a-b to bond the two pairs of fiberboard. This creates four stacked layers of fiberboard.

   4. After curing, use sand paper to sand off any excess glue.

   5. Note: it is important to cure the layers as aligned as possible to create a flat edge.

Step 4: Anti-stick Solution

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