10 Questions You Should to Know about Portable Powder Coating Machine
Questions for basic hobby powder coating | MIG Welding Forum
I am probably stupid, but whatever! I have bought one of the cheep hobby powder coating guns with a box that adds the electrostatic charge, it is second hand and comes with some powders to play with, I am just trying it out as rattle cans are driving me daft.
So a couple of questions, I though about a small fan in side to stair things up but then thought as it is a powder until it melts that may be a bad idea. I have also seen Youtube videos of some using grill ovens and I think the only comment I really got from using them was that the element must have a baffle?
I believe the temp range is typically 200 to 220 degrees C, but guess I will discover that when I get the powders.
Now I do not have a spare oven lying about so decided to try and build something as a get me going thing, very limited space, and uses a 1kW heater. This is what I put together today, the only thing that I had to buy in was the 100l metal drum, £6 for two of them the one on the bottom is a stand at the moment. Looking to hold a few 10" x 12 to 14inch pieces at the most for the time being.
Planning to have a metal plate over the top of the element.
but that is tomorrows job as well as a couple of bars for supporting things on.
I would appreciate any thoughts.
Adrian That will do the job.
When i first got my hobby set up i just made a box and used a heat gun to heat the box and bake the poweder, and got good finishes almost everytime. Where i didnt get a good finish was more down to prep on the part more than the baking element.
One thing i would suggest is that if you want to mask if parts, spend the bit extra and buy the high temp masking tape
I have since upgraded my box and heat gun to our old electric cooker when the misses wanted to switch to a gas cooker I thought about trying to get an oven stat and dial from the recycling yard in the area, but they are that picky and do not let anyone get parts off them when placed in the container. I did price up a new one from a supplier but by the time I added VAT and delivery it was cheaper from China! The still gets me after all the shipping etc how, but I guess a lot is to do with scale.
Cut a 10 inch disc from some tread plate today and this is now over the top of the ring, sorted the lid a bit better and around the top edge of the inner cylinder is a row of small holes punched with a joddler so I can push thin rods through and use them to support pieces.
Adrian Had a play today, with a cut piece that went a little wrong. That way if I get the coating wrong no big deal.
Still pleased with it, I have to come up with a bit better then a loop of wire though as it leave a small gap in the coating and I also got a shadow from the loop if you can see that.
But the gun worked well, it had a wire loose from the clip to earth but sorted that before use, the charge seemed to work well, not much on the floor.
Must start to download some how to's and learn a bit more.
Adrian I like the tub and rod idea, but could do with a bit bigger, not by much though, I have been using a bar I stick through a door on the inside of the garage and hang things off the bar, the plates I have been doing are 10 inch tall and sometimes wider so would like something to deal with them.
I watched a few videos and they all seem to dump a lot of powder coming out in a real dense fog, but I seem to get better with a fine mist, it takes a bit longer, but less ends up on the floor, I am probably not putting enough on the pieces yet, but as only second go I am still happy with the results. Do you find you waste a lot and do you collect and re-use?
Is there anywhere in the North for powders, only looked on Ebay and some seem pricey, farther away get to around £20 per Kg depending on type.
Sorry questions questions, but it gives a way to finish things nicely.
I really must box up my controller tomorrow rather then have wires on top of the mill.
Adrian
Do powders go off? I guess they could get damp and that would make them useless, but not sure if they do anything else with age.
I guess price is the cost of going for small quantities, someone has to weigh it, bag it, and ship it from a larger batch.
Adrian
So a couple of questions, I though about a small fan in side to stair things up but then thought as it is a powder until it melts that may be a bad idea. I have also seen Youtube videos of some using grill ovens and I think the only comment I really got from using them was that the element must have a baffle?
I believe the temp range is typically 200 to 220 degrees C, but guess I will discover that when I get the powders.
Now I do not have a spare oven lying about so decided to try and build something as a get me going thing, very limited space, and uses a 1kW heater. This is what I put together today, the only thing that I had to buy in was the 100l metal drum, £6 for two of them the one on the bottom is a stand at the moment. Looking to hold a few 10" x 12 to 14inch pieces at the most for the time being.
Planning to have a metal plate over the top of the element.
but that is tomorrows job as well as a couple of bars for supporting things on.
I would appreciate any thoughts.
Adrian That will do the job.
When i first got my hobby set up i just made a box and used a heat gun to heat the box and bake the poweder, and got good finishes almost everytime. Where i didnt get a good finish was more down to prep on the part more than the baking element.
One thing i would suggest is that if you want to mask if parts, spend the bit extra and buy the high temp masking tape
I have since upgraded my box and heat gun to our old electric cooker when the misses wanted to switch to a gas cooker I thought about trying to get an oven stat and dial from the recycling yard in the area, but they are that picky and do not let anyone get parts off them when placed in the container. I did price up a new one from a supplier but by the time I added VAT and delivery it was cheaper from China! The still gets me after all the shipping etc how, but I guess a lot is to do with scale.
Cut a 10 inch disc from some tread plate today and this is now over the top of the ring, sorted the lid a bit better and around the top edge of the inner cylinder is a row of small holes punched with a joddler so I can push thin rods through and use them to support pieces.
Adrian Had a play today, with a cut piece that went a little wrong. That way if I get the coating wrong no big deal.
Still pleased with it, I have to come up with a bit better then a loop of wire though as it leave a small gap in the coating and I also got a shadow from the loop if you can see that.
But the gun worked well, it had a wire loose from the clip to earth but sorted that before use, the charge seemed to work well, not much on the floor.
Must start to download some how to's and learn a bit more.
Adrian I like the tub and rod idea, but could do with a bit bigger, not by much though, I have been using a bar I stick through a door on the inside of the garage and hang things off the bar, the plates I have been doing are 10 inch tall and sometimes wider so would like something to deal with them.
I watched a few videos and they all seem to dump a lot of powder coming out in a real dense fog, but I seem to get better with a fine mist, it takes a bit longer, but less ends up on the floor, I am probably not putting enough on the pieces yet, but as only second go I am still happy with the results. Do you find you waste a lot and do you collect and re-use?
Is there anywhere in the North for powders, only looked on Ebay and some seem pricey, farther away get to around £20 per Kg depending on type.
Sorry questions questions, but it gives a way to finish things nicely.
I really must box up my controller tomorrow rather then have wires on top of the mill.
Adrian
I used to buy my powders from Rhom and Haas at about £2 kg (last powder I bought was 25kg of high gloss black for about £54 plus delivery) for plain colours but I see they have been taken over by Akzo Noble.
Do powders go off? I guess they could get damp and that would make them useless, but not sure if they do anything else with age.
I guess price is the cost of going for small quantities, someone has to weigh it, bag it, and ship it from a larger batch.
I've just got my powders from electrostatic magic . I havnt recycled the powder, although that would be easy in a plastic tub. I only occasionally powder coat something, but the comperessor I use just gives a very fine mist. dont worry about too thick a coating as the powder falls off if its too thick, so unlike paint you shouldnt get runs or dripsThanks for the seller and I did not know about powder falling off if to thick.
Adrian
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