Thread: Plastic Media Blasting?

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it is a diesel powered c/p 185 portable. it has a rating of 185 cfm . you only use 20 to 30 psi but it takes a lot of cfm to supply a 1 inch hose.

I do not want to do any advertising that is against the rules on the forum, but I may be able to answer some of your questions on media blasting or where to get the supplies if you want to PM me or you can email me at the following address.

David.Smith@abrasivesandequipment.com

racer dave, i'm trying type 5 melanine and have'nt used it before. i was told it was a little longer lasting than type II urea. any truth to that

shine

Sorry to take so long to reply, I was out of town until this morning.

Melamine is Type III, (Type V would be Acrylic), and yes it will last a little longer than Urea. Urea is a 3.5 on the Mohs scale, compared to 4.0 for Melamine. It is not likely that you will notice a huge difference, but if cost is pretty comparative from your supplier then Melamine will be your best bet.

shine is right about the amount of air required. The nozzle at the end of the blast hose is the determining factor in the volume of air that will be required. Obviously, the lower the pressure you want at the nozzle, the lower the cfm requirement will be. A #8 (1/2") nozzle will require 338 cfm to operate at 100psi as opposed to 195 cfm to operate at 50psi.

racer dave, i have type v 16/20 . this will be my first time with it and went with what was recomended to the supplier. i will be doing fiberglass and sheet metal both. trying to find the happy medium . [ no pun intended ]

shine

Type 5 (Acrylic) would be a good choice for you since you are doing both fiberglass and metal. Acrylic is one of the softer and lighter plastic medias out there. Due to its light weight and softness it will not be as harsh on the gel coat of fiberglass. You can eat through the gel coat if you are not careful, especially with some of the harder and heavier types of plastic.

It will be a little slower at removing thick coatings or hard coatings (such as powder coatings) than Urea or Melamine. But the difference will not be very much on typical automotive applications.

All in all I think you have found a HAPPY MEDIUM. (pun intended)


David

thanks david. i have a 54 vette to do i'll keep you posted.