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Originally posted by DesigningByCoffee
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Yeah, way more room the move now!
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Thanks Matt.
Yeah, way more room the move now! -
Hi all, i just bought a fire blanket ($10 from big B's) to use as insulation but after I took the black handles off it i noticed LOADS of fibers had dropped off it onto my lap. It's only because the sun was shining onto my shorts that I noticed them, there were hundreds! I'm keen to insulate to (hopefully) reduce tipping and power consumption but i don't want these fibers in my coffee. Has anyone used/found any other insulation products?
cheers
JonnyComment
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Hi Jonny
Wouldn't think it would be too much of an issue - quick vacuum first? (they do throw lots of threads though
)
Cheers MattComment
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Yes the fire blanket does make quite a mess when its first cut. I folded over the frayed edges so that they were inside my wrapping around the bread pan. Over time I found less and less strands coming off the blanket in general, still I agree its not ideal to have those very fine fibres flying around all over the place (hot air gun).Originally posted by scottbase View Post
However if I had my corretto time again I would look into insulating the surrounding space of the bread pan instead.
Another option you could try is the Fire brick ceramic fibre insulation blanket for pizza ovens.
eBay link removed per site posting policyComment
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There's no need to cut the blanket up at all...
I just folded mine up in a way that fully enclosed everything into a roughly 4-ply wrap that ended up being quite a neat package. No errant fibres to deal with. As an aside, all fibreglass matting, woven cloth, etc that is sold in Oz, has to be made using bio-soluble long strand fibres, to ensure that nasty things don't happen if you manage to inhale or eat a few strands.
Mal.Comment
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Thanks for the responses. I was shocked how many came out just by unpicking the stitching of the black handles, a few stuck into my fingers to give me that annoying fibreglass itch - even though they may be digestible I'd rather avoid having them in my brew.
Great idea Steve, never thought to insulate the surrounding space in the walls on the unit, this should protect the motor and wiring from excess heat too. I might try wrapping the blanket in heavy foil for the lid to try and seal the fibres in.
I tried my first roast today without any insulation and noticed (i've kept the original bread machine glass in the new metal lid for viewing the beans) a rolling air flow in the chamber that went right around the basket, putting the insulation in the walls instead of filling the space should keep this nice air flow as well avoid any extra fibre in my diet
I'll do a full post in the corretto thread with pics of my build soon. It's been a great few months of this new hobby and i've already progressed from popper to popper II, to Small breville to my latest 'Big Loaf' Corretto.
Cheers
JonnyComment
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FYI Most ceramic fibre blankets are designed/certified ONLY for encapsulated use! You do NOT want their fibers floating around your environment!
Java "Think asbestos!" phileToys! I must have new toys!!!Comment
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Yes indeed...
Ceramic fibres/dusts of any kind can be very nasty if ingested or inhaled, including the various types that go under the generic description of a "Mineral Wool"....
Mal.Comment
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As can the fire blankets already being recommended and used. Even though they are non toxic, the material itself still carries the same warnings for repeated exposure and use, respiratory, eye and skin irritation.Originally posted by Dimal View PostYes indeed...
Ceramic fibres/dusts of any kind can be very nasty if ingested or inhaled, including the various types that go under the generic description of a "Mineral Wool"....
Mal.
The fire blankets don't need to be cut to shed strands, you only have to rub it on something to see that they quite easily shed lots of strands which I found quite irritating on the skin and who knows how much I inhaled over time using it.
If one was to use the ceramic wool insulation, as suggested it would be to fill the space around the bread pan (like an oven)
Ideally as suggested by scottbase you may want to cover it in foil, or better yet purchase the hi temp stuff already covered with foil.
Leaving enough of a gap between the pan and insulation for easy removal of bread pan, so as not to disturb the insulation would result in a lot less chance of fibres becoming air borne than having the blanket, fibreglass or ceramic wrapped around the pan pulled in and out ect.Comment
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Not the fire-blankets (for welding workshops, etc) that I have used. They do NOT shed anything so not aware of the fire-blankets being referred to....Originally posted by Steve82 View Post
Mal.Comment
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Hi all,
Just to let you know that no amount of insulation, directly around the basket and in the walls of my Big Loaf machine solved my issues - still loads of scorching of the beans. This was the first time i actually threw out beans due to failed roasts So i've given up on the Big Loaf and gone back to my trusty BB280. Which works perfectly without any insulation at all!
I noticed the Big Loaf did not agitate the beans as quickly as the BB280 and I also had a high lid, so more heat was required to get the temp up for larger batch size = scorchio!
When i get some time i'll make a new lid for the big loaf and try againComment
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That's a bit strange Scott...
Have been using a Breville Big Loaf with complete success for many years, including an insulated pan and cover. Never had any issues with agitation either, even with batch sizes approaching 1.2Kg. Sorry to hear it hasn't worked out for you but glad your alternative BM is doing the job...
Mal.Comment
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Yes, I was pretty disappointed as I wanted to do larger batch sizes. Is your lid flat across the top of the basket or raised?Comment
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What sort of gun are you using and how far into the pan does it go?
When I went to larger batch sizes (350g up to 750g in a BBM100) I had to increase paddle height to get good agitation, especially later in the roast (as the beans expand and end up close to the top of the pan - maybe this is when yours are scorching?).
But I also have a 'splitter' which I believe helps to get a lot more heat and airflow to the bottom of the bean mass, allowing lower input temps as well - but no-one I know of has ever supported the theory enough to give it a go and back up the hypothesis! So maybe it's all just snake oil
But I've never even seen scorching - so something must be working!
Cheers Matt
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Just flat across the top, made out of 6mm cement board...Originally posted by scottbase View Post
What matt suggests is a good point though. If your Heatgun is penetrating too far into the bread-pan, then you do run the risk of scorching and/or tipping. With mine for example, it would penetrate below the lid by about 25-30mm or so, and is a nice neat fit.
These days I rarely roast batches more than 650g but occasionally do batches of 900g with great outcomes. With the 650g batches, the maximum heat setting I use is about 65% (on a Makita tradie heatgun); the 900g batches require a max of 75% on the dial. Typically, roast batches are completed just within or just over 20 minutes from go to whoa. Lots of this sort of info to be found here... http://coffeesnobs.com.au/home-roast...er-week-8.html
Mal.Comment
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