span class="Title">

p>Resin Bonded Sand Moulds</p>


p>You mix a resin and a catalyst with DRY sand, forms a mixture similar to petrobond. You use this to ram up one side of your mold. After a period of time it sets up to a porous sand stone consistency [A lot like insulating fire brick]. You then turn the mold and repeat the process. </p>

p><span style="FONT-WEIGHT: bold">Pros:</span></p>

span style="FONT-WEIGHT: bold"><em>

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       <li><span style="FONT-WEIGHT: bold"><font size="3">Easier to touch up</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Much easier to make multi part Moulds</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Seems to get better detail</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Mold can be made days/weeks before pouring</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Makes very good cores</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Vents and sprues can be molded separately and added to your mold separately. This way you can have tall sprues and vents without using a lot of sand.</font></span></li>




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       <li><span style="FONT-WEIGHT: bold"><font size="3">Sand is not as easily reusable</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Cost is higher than green sand or petrobond</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Mold is affected by moisture over longer term.</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Working time of resin is a little short after mixing.</font></span></li>
       <li><span style="FONT-WEIGHT: bold"><font size="3">Mixing is a pain {No worse than mulling}</font></span></li>



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Last-modified: Thu, 14 Dec 2006 19:07:52 GMT (1489d)
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