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hybrid blasting cabinet diy

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sawdust1
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hybrid blasting cabinet diy

Postby sawdust1 » Mon Jun 18, 2018 10:33 pm

I built my own cabinet, just finished it. My issue is abrasive supply I parted out a Kijiji donor that has a siphon supply. It does not supply much! possibly because I extended the siphon hose to accommodate the larger reach in the cabinet. So does anyone have suggestions to increase sand before I start modifying?

My solution unless someone is willing to tell me it does not work! Put a hopper above the blaster so it will feed by gravity and then mix at the last minute at the nozzle. I can put a flow control valve in there as well. This will mean digging the sand out of the bottom of the machine and pailing it up to the top hopper. For the limited amount I blast I am willing.

Tak, David

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acourtjester
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Re: hybrid blasting cabinet diy

Postby acourtjester » Tue Jun 19, 2018 7:04 am

I built my own blast cabinet too and did have problems with the siphon action, and have corrected it. There are 2 things I did have a deep sump for the sand to collect in the bottom that was to deep. I reduced the depth and another thing is you must have a small hole in the siphon tube so air gets mixed with the sand to aid in its flow. The siphon action is not strong enough to pull just sand. The cabinet now recycles the sand from the bottom I just add sand as needed. You also need a vacuum to pull the dust out of the cabinet the sand does break down into fine dust over time.
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sawdust1
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Re: hybrid blasting cabinet diy

Postby sawdust1 » Tue Jun 19, 2018 8:45 am

I may have to raise the floor of the sand collection to lessen the depth. My siphon hose may be too large diameter, when I release the trigger the sand falls back and creates a column. My air supply fitting in the siphon tube for some reason has a restrictor in it, going to drill that out. My vacuum does a good job but I need to control where the fines go. I will attempt a video walkaround. Thank you for the information, food for thought.

sawdust1
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Re: hybrid blasting cabinet diy

Postby sawdust1 » Tue Jun 19, 2018 9:33 am

Here is a video link of my cabinet. Not quite done yet.
https://youtu.be/fK6W8KRLZio

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acourtjester
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Re: hybrid blasting cabinet diy

Postby acourtjester » Tue Jun 19, 2018 9:45 am

Great use of things you have at hand, Here are a few images of mine as I said I had to raise up the bottom where the sand collects for better pickup of the sand.
DSCF3278.JPG

DSCF3282.JPG

DSCF3290.JPG

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DIY 4X4 Plasma/Router Table
CandCNC DTHC-IV & Feather Touch
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PM 256 tig

sawdust1
Elite Contributing Member
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Posts: 148
Joined: Tue Apr 19, 2016 10:29 pm
Location: In the way.

Re: hybrid blasting cabinet diy

Postby sawdust1 » Tue Jun 19, 2018 10:09 pm

@acourtjester I improved the airflow in the air supply tube that leads into the sand pickup, also learned to be patient.... Two or three seconds of airflow are needed before the sand appears. I have no idea why but my protection film on the inside of the plexiglass is not being damaged at all. Not complaining! I am going to put and adjustable air intake somewhere, the exhaust fan is big enough to keep the compartment completely clear if the door is left partly open. Closed door makes it hard to see.

Onto the oven!

David


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