Make: Skat Blast
Ace: Levi Gibson (firstname.lastname@example.org).
Location: Welding Shop
The blast cabinet is very useful in cleaning and prepping materials for painting and welding. The beads will wear down the material to bare metal. You can also use the cabinet to bead blast acrylic with a stencil to make frosted looking designs. There are many types of media that can be run in a blast cabinet. With the proper media people create designs in stone and wood. We currently are using glass beads which tend to be less aggressive.
Here is an example of this piece of equipment being used.
Blast Media - The abrasive material used in the blast cabinet.
Foot Pedal - This is the foot actuated air switch to turn on/off the flow of air/blast media.
The blast cabinet contains tiny glass beads in the bottom. There is a large wire mesh that divides the upper and lower sections of the cabinet. The foot pedal is connected to compressed air and controls the flow of air going to the nozzle assembly. The air passing through the nozzle creates a vacuum and draws the glass beads in the bottom of the machine up into the air stream in the nozzle. The machine requires 80-125 psi. The glass beads are rapidly accelerated into the part you are bead blasting. The beads fall back into the bottom of the cabinet and are recycled through the system.
Demonstrate you can safely setup the blast cabinet and use a stencil to produce a design on acrylic. The stencil will protect certain areas of acrylic from the glass beads. The beads causes the acrylic to have a frosted look.
- Tape existing stencil to a piece of acrylic scrap. The stencil will only allow abrasion in the areas desired.
- Open the cabinet door using the door latch.
- Place the stencil/acrylic into sandblast cabinet
- Make sure to secure the door using the latch. If the door is left open it will create a cloud of dust that should not be inhaled.
- Turn on the cabinet light and fan with the power switch located on the top left of the machine.
- Insert your arms into the gloves and position yourself for a clear view into the cabinet.
- You may need to hold the corner of the part down while blasting, manually aim where the stencil doesn't cover the acrylic. Do not point the gun at your gloves or the window.
- Position your foot in the foot pedal mechanism. Once the pedal is depressed sand will blast out of the nozzle.
- Keep the nozzle 3 to 4" away from the acrylic and keep the nozzle moving so it keeps a consistent frost pattern.
- Before removing parts, wait 5-10 mins after turning off the power switch. This allows time for the dust in the cabinet to settle.
- Once you remove parts make sure to close the cabinet door and turn the power switch to the off position.
- Make sure the cabinet door is closed before stepping on the air activation pedal to prevent a dust cloud.
- Keep the activation pedal clear when loading the cabinet to prevent accidental blasting.
- After you are done using the blaster let the dust in the cabinet settle prior to opening the door.
- Inhaling the dust produced by the cabinet is bad for your lungs.
- Never point the nozzle towards your hand or the window in the cabinet.
If abrasive stops flowing most likely the nozzle is clogged. To unclog a nozzle you will need to press the tip flat against a solid piece of material and quickly cycle the foot pedal. This process should force air down the siphon tube and blow out any clogs. Make sure the cabinet door is closed before attempting this. If this does not resolve the issue you will need to contact the technician.
The plastic window cover needs to be replaced when it gets damaged by the glass beads. If you notice the window is hazy and difficult see through let the technician know.
Specific Maintenance Tasks
|Maintenance Procedure||Frequency||Done By|
|Nozzle Change||As Needed||Ace/Tech|