Sheet wax tips needed + single layer skinning


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wojtepanik
wojtepanik
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Hello 
I will be using Sheet Wax for the first time. I will be applying it onto mirror cover to get mould for single layer 'skin', Is it pliable in any way or is it rigid in it's structure? will I have to apply it in form of strips or other shapes adjusted for the shape of the mirror, or is one sheet applied from the top enough to take the shape of the mirror? What thickness should I choose? I have available .5mm and 1mm and up. I am planning to use 1 200-250gsm layer, just as a skin, which I will be glueing with tinted black 5min epoxy. Do I apply release agent onto the wax? Thanks

~~~Everytime I hear sound of demoulding part I have eargasm~~~
MarkMK
MarkMK
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The 1mm sheet wax should work well and is pliable enough to conform to most shapes, especially is warmed-up a little with a heat gun or hair dryer. Start in the centre and gently ease it outwards towards the edges

1mm should also provide the necessary dimensional difference to create a close fitting cover. Be aware, though, that you'll need to do a little work on the mould surface as it will be matt, so it will likely need some compound polishing, at the very least

I regularly infuse similar mirror covers and find that two layers of 240g twill work best and are still within the necessary thickness tolerance, although they're produced using vacuum. If you're looking to wet-lay, it might be a bit more difficult to consolidate things reliably, but you could look to pack the mould to help press the fabric more tightly into the mould. 


Edited 5 Years Ago by MarkMK
wojtepanik
wojtepanik
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MarkMK - 5/23/2019 7:40:02 AM
The 1mm sheet wax should work well and is pliable enough to conform to most shapes, especially is warmed-up a little with a heat gun or hairs dryer. Start in the centre and gently easy is outwards towards the edges

1mm should also provide the necessary dimensional difference to create a close fitting cover. Be aware, though, that you'll need to do a little work on the mould surface as it will be matt, so will likely need some compound polishing, at the very least

I regularly infuse similar mirror covers and find that two layers of 240g twill work best and are still within the necessary thickness tolerance, although they're produced using vacuum. If you're looking to wet-lay, it might be a bit more difficult to consolidate things reliably, but you could look to pack the mould to help press the fabric more tightly into the mould. 


what is your solution for the last layer? peelply ? I was thinking about using perforated film as last layer to get it more smooth


~~~Everytime I hear sound of demoulding part I have eargasm~~~
MarkMK
MarkMK
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Yes, when using only a couple of layers of fairly lightweight fabric, the peel-plied inner surface is usually flat enough. Making sure that the vacuum bag is generously pleated helps to avoid any unwanted bridges and thicker sections that might affect the fit

The peel-plied finish also gives you a good surface for bonding without need to key it too much

Using two plies of fabric will make the part a little more resistant to cracking during de-mould. If consolidated well, they should offer a great fit and the part shouldn't be more than around 0.5mm thick. A single ply might be more prone to cracking during de-mould, especially on the first couple of pulls where a bit of effort might be needed to get them out




Edited 5 Years Ago by MarkMK
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