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TOPIC: My first sandblasted

My first sandblasted 01 Aug 2015 09:21 #1

  • Dustin Null
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Well, had a customer call that is moving locations and need signage and this sandblasted HDU was one of them. I have sandblasted smaller signs out of wood but never HDU or this size before. It was a learning experience that's for sure.

Not sure if it was the type of sand, sandblaster or air compressor but man it took FOREVER to blast and what I thought to be alot of sand and I had to be right up on it.

If I blast again and not cnc I know I need to go deeper so I can get a cleaner paint job on it, as well as a better timeframe But it stands out really well next to the old ugly red one.

The only automation was blastmask so I thought this was appropriate spot to post.
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My first sandblasted 03 Aug 2015 08:29 #2

  • Mark Summers
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How big were these two panels Dustin? Tell me about the compressor your were
using for the project. i.e. what was the CFS output of the compressor?
Mark Summers
The Sign Shoppe of Summit County
Frisco, CO.
www.SignShoppe.co
Senior Client Executive/ Brush Cleanup Boy

My first sandblasted 03 Aug 2015 09:54 #3

  • Dustin Null
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Mark,

I did not do the sandblasted on the right, that was existing.

The HDU was Design Board 15lb from NGlantz. I don't know anything about the sandblaster, but the compressor is an Kobalt 3.7HP 60 gallon from Lowes.

Powerful 230-volt, 3.7 (running) HP motor
155 max PSI, 11.5 SCFM at 90 PSI.

I was using regular play sand to blast and I've seen people use black silica sand, I think that's what it's called, maybe I shouldve used that.

It just didn't want to blast away and HDU is soft so I figured it would go fast. It took 11 bags of 50 lb sand and it could've took more to go deeper.

I've always been the one to apply the blast mask and actually blast so this was an experience for me.

My first sandblasted 03 Aug 2015 10:07 #4

  • Mark Summers
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So there is the discussion and problem I hate to tell you your shop compressor set-up is
woefully inadequate for sandblasting. What needed at a minimum is
a 100 CFS compressor, you know like a gas powered trailer mount. I use a 185 CFS diesel
compressor. I'm guessing the panel was about 2'x8', I'm guessing I would burn about
150-200 lbs of sand and get a good 1/4" blast. 15# HDU should make it that much
easier to blast. So PSI doesn't mean much. It's the volume of air (CFS) that makes the
blast effective. Hope I didn't ruin your day. Been down the road with using a small
compressor. I understand your frustration all too well.
Mark Summers
The Sign Shoppe of Summit County
Frisco, CO.
www.SignShoppe.co
Senior Client Executive/ Brush Cleanup Boy
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My first sandblasted 03 Aug 2015 11:54 #5

  • Gene Uselman
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Remember Joe? He said that he would pocket the sign to about the depth he wanted and then sandblast-
ends up more even also. Makes sense to me. He still posts to the shopbot forum (all tho he hates Shotbots
... and most everything else) and is still cranky. But he knows a lot of stuff. Gene
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My first sandblasted 03 Aug 2015 13:29 #6

  • Dustin Null
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the sign was 2' x 7'

I figured the air compressor wasn't powerful enough -

doing a pocket then just finishing off with the blaster is not a bad idea to get the texture like gene said

My first sandblasted 03 Aug 2015 14:36 #7

  • Geoff Smithson
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I blasted this cedar sign with a 5 hp 60 gallon compresser after using the router to pocket 1/4" deep around everything. I used 1/4" PVC as my mask. I used (5) 50 lb bags of black beauty sandblast to do both sides (3' x 4'). Could have done a little more blasting to get more texture but very happy with the results.

I know my compressor isn't ideal but it got the job done.

I haven't blasted HDU yet...that's next!
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Winnipesaukee Manufacturing, Laconia, NH
Packaging, Crating, Wood and Plastic Machining, Signs, etc.
www.facebook.com/winnimfg

My first sandblasted 03 Aug 2015 14:50 #8

  • Mark Summers
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I can see where wood be do the trick as you would then have a texture background ready to
go. Now with HDU you really can't lay a Grain Frame on a pre-routed
piece. So the I agree with the pre-routing idea but I don't really see how you can
do this with HDU and make it look respectable. Sandblasting HDU without a Grain Frame
doen't look like much.

Geoff: did you glue up your cedar sign yourself?
Mark Summers
The Sign Shoppe of Summit County
Frisco, CO.
www.SignShoppe.co
Senior Client Executive/ Brush Cleanup Boy

My first sandblasted 04 Aug 2015 05:52 #9

  • Geoff Smithson
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Mark: I did, cedar 2x4's ripped to size and glued up. I priced out a premade blank and thought it was a little pricey, but after all the work involved with the sizing and gluing up I should have just spent the money on the blank.
Winnipesaukee Manufacturing, Laconia, NH
Packaging, Crating, Wood and Plastic Machining, Signs, etc.
www.facebook.com/winnimfg

My first sandblasted 04 Aug 2015 08:34 #10

  • Mark Summers
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Tried Gluing my own before Geoff. Won't do that again. Recently did a
sandblasted cedar and ordered my blank from:
www.perfectplank.com/cedar_sign_blanks_signs.html
As the name suggests it was perfect!
33"x71" - 3" thick. Money well spent.
I'll get a picture of the installed sign and post it.



Mark Summers
The Sign Shoppe of Summit County
Frisco, CO.
www.SignShoppe.co
Senior Client Executive/ Brush Cleanup Boy

My first sandblasted 04 Aug 2015 11:14 #11

  • Geoff Smithson
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Wow! their prices seem pretty good although shipping out here to the northeast will make it higher. I'll definitely try them out on my next one.

That looks like a cool sign would love to see a picture of that when you finish it Mark.
Winnipesaukee Manufacturing, Laconia, NH
Packaging, Crating, Wood and Plastic Machining, Signs, etc.
www.facebook.com/winnimfg

My first sandblasted 04 Aug 2015 11:16 #12

  • Mark Summers
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I would just factor in the price. Shipping to Colorado was pretty reasonable I thought.
I think $150.
Mark Summers
The Sign Shoppe of Summit County
Frisco, CO.
www.SignShoppe.co
Senior Client Executive/ Brush Cleanup Boy

My first sandblasted 06 Aug 2015 08:21 #13

  • Mark Summers
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Here's a picture of the finished Pug Ryans sandblast sign. I did a patina on the letter
edges (Scuplt Noveau) and then painted in the insides with copper Nova Color.
Sculpt Noveau's copper I felt didn't have enough punch to it.
So the glue lam is a cedar lam by the way.


Mark Summers
The Sign Shoppe of Summit County
Frisco, CO.
www.SignShoppe.co
Senior Client Executive/ Brush Cleanup Boy

My first sandblasted 06 Aug 2015 10:50 #14

  • Geoff Smithson
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Very nice! I love the patina on the letters!
Winnipesaukee Manufacturing, Laconia, NH
Packaging, Crating, Wood and Plastic Machining, Signs, etc.
www.facebook.com/winnimfg
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