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Commit 2f97abc6 authored by Adrián Torres's avatar Adrián Torres
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coupons_update

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<p>I take advantage and make all the cuts for the three modules of the project. In this assignment I am going to mill only a part of <b>module 2.</b> I upload the file to SketchFab because it is too big for the repository.</p>
<p><div class="sketchfab-embed-wrapper">
<iframe title="A 3D model" width="640" height="480" src="https://sketchfab.com/models/78537eb820264beba01d4313111b294a/embed?preload=1&amp;ui_controls=1&amp;ui_infos=1&amp;ui_inspector=1&amp;ui_stop=1&amp;ui_watermark=1&amp;ui_watermark_link=1" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
<iframe title="A 3D model" width="420" height="320" src="https://sketchfab.com/models/78537eb820264beba01d4313111b294a/embed?preload=1&amp;ui_controls=1&amp;ui_infos=1&amp;ui_inspector=1&amp;ui_stop=1&amp;ui_watermark=1&amp;ui_watermark_link=1" frameborder="0" allow="autoplay; fullscreen; vr" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
<p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;">
ç<a href="https://sketchfab.com/3d-models/module-2-part-2-model-fab-academy-2020-78537eb820264beba01d4313111b294a?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">Module 2 part 2. Model. Fab Academy 2020.</a>
by <a href="https://sketchfab.com/adriantrains?utm_medium=embed&utm_source=website&utm_campaign=share-popup" target="_blank" style="font-weight: bold; color: #1CAAD9;">adriantrains</a>
......@@ -169,7 +169,7 @@
<p>The <b><i>composites process</i></b> is as shown in the following drawing. We have a <b>3D mold</b>, which we protect with a <b>protective film</b> (the kitchen one is worth it). Then we will place the fiber or the <b>fabric impregnated in the epoxy resin.</b> Next we put a <b>release film</b> (it will help us to get the excess resin out of the mold). Then a <b>blanket</b> that covers the entire mold and absorbs excess resin. Finally all this is put inside a <b>vacuum storage bag.</b></p>
<b>DIBUJO</b>
<p><img src="images/week16/week16.27.jpg" width="80%"; max-width="700" /></p>
<p>Once I am clear on the process, I protect the floor and the work table and prepare all the necessary materials.</p>
......@@ -220,13 +220,57 @@
<h1><a id="group"></a>Produce test coupons for your composite fabrication process(es).</h1>
<p>To test the coupons, I'm going to use a cut-out-of-a-sphere design, up and down inside a prism. The size is 200 x 200mm. To design it, I use Rhinoceros. Once I have both designs, I go to the Aspire, where as in the individual assignment I simulate the result of the 3D mold. I do two trajectories, rough and finish. As I liked the rough finish, I will do it alone, it takes 20 minutes for the two pieces. </p>
<span class="image main"><img src="images/week16/week16.13.jpg" alt="" /></span>
<p>To test the coupons, I'm going to use a cut-out-of-a-sphere design, up and down inside a prism. The size is 200 x 200mm. To design it, I use Rhinoceros. Once I have both designs, I go to the Aspire, where as in the individual assignment I simulate the result of the 3D mold. I do two trajectories, rough and finish. As I liked the rough finish, I will do it alone, it takes 20 minutes for the two pieces. At the bottom of the page are the STL files to download.</p>
<p><img src="images/week16/week16.13.jpg" width="70%"; max-width="700" /></p>
<p>Once the two molds have been milled with the 6 mm cutter for polystyrene, this is the result.</p>
<span class="image main"><img src="images/week16/week16.28.jpg" alt="" /></span>
<p>The next step is to cut the burlap and linen, for this I will use the laser cutter. Before I iron the fabrics on the textile vinyl sheet. Use the following parameters <b>Vector: Power: 37% / Speed: 100% / Frequency: 1574 Hz ppi 400</b>, but it fell short cutting. So increase the power and frequency, these are the correct parameters <b><i> Vector: Power: 80% / Speed: 100% / Frequency: 3548 Hz ppi 400. </i></b></p>
<p><img src="images/week16/week16.29.jpg" width="70%"; max-width="700" /></p>
<p>I cut three circles of linen (left) and three circles of burlap (right).</p>
<p><img src="images/week16/week16.30.jpg" width="70%"; max-width="700" /></p>
<p>I make the coupons at the same time as the piece for my assignment, so I take advantage of the mixture of the epoxy resin and the vacuum bag. First, place the protective film to recover the molds and reuse them more times.</p>
<p><img src="images/week16/week16.31.jpg" width="70%"; max-width="700" /></p>
<p>For the concave mold I use burlap and for the convex mold I use linen. <b>3 layers</b> in each mold. To place each layer, I use a methacrylate cut to size, with it I guide myself. To put the epoxy resin I use the brush.</p>
<span class="image main"><img src="images/week16/week16.32.jpg" alt="" /></span>
<p>Next I put the release film and the absorption blanket. I put it in the vacuum bag and when I start to vacuum, the excess resin begins to filter through the real film. Is incredible.</p>
<span class="image main"><img src="images/week16/week16.33.jpg" alt="" /></span>
<p>After 24 hours, I take the molds out of the vacuum bag. The first thing I notice is <b>linen.</b> There were three layers and it has become one and solid. I notice that in the <b>concave</b> area that is the one that went against the mold it is completely smooth, the outer area has some wrinkles.</p>
<span class="image main"><img src="images/week16/week16.34.jpg" alt="" /></span>
<p>Video of the <b>resistance test</b> of the composite with <b>linen.</b> 💪</p>
<p><iframe src="https://player.vimeo.com/video/422132333" width="100%" height="360" frameborder="0" allow="autoplay; fullscreen" allowfullscreen></iframe></p>
<p>On the <b>burlap,</b> it also had three layers. And the same thing happens, in the mold area, the <b>convex</b> side is smooth and the outer area has some wrinkles.</p>
<span class="image main"><img src="images/week16/week16.35.jpg" alt="" /></span>
<p>Video of the <b>resistance test</b> of the composite with <b>burlap.</b> 💪</p>
<p><iframe src="https://player.vimeo.com/video/422132466" width="100%" height="360" frameborder="0" allow="autoplay; fullscreen" allowfullscreen></iframe></p>
<a href=""><b></b></a>
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<h1>Files</h1>
<p>Find below the files that I made for this assignment.</p>
<ul><li><a href="assignments/week15/little_train.stl"> <b>Little Train Mold</b></a>
<ul><li><a href=" https://skfb.ly/6SLYv"><b>Module 2 part 2</b></a>
<li><a href="assignments/week16/cupon1.stl"> <b>Coupon test 1</b></a>
<li><a href="assignments/week16/cupon2.stl"> <b>Coupon test 2</b></a>
</ul>
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