Ohio Blast Rooms That Feed a Paint or Powder Line
A blast room upstream of a paint booth or powder line has two jobs: remove what needs to come off, and keep its dust away from the coating that comes next. Ohio fabricators, switchgear and enclosure builders, HVAC equipment makers and job shops get the best results when the blast room, the coating area and the airflow between them are designed together. Double D installs blast rooms with that downstream connection in mind.
Discuss your installationLaying out part flow from blast to coat
Freshly blasted steel starts to flash rust if it waits too long before primer or powder. Moving parts directly from the blast room to the coating area, on a cart line or conveyor, shortens that gap. The blast room's exit door, the transfer path and the coating area entrance should line up so parts are not parked in a dusty aisle.
Keeping blast dust out of the finish
Even a well-sealed blast room releases some dust when doors open. If the coating area is pulling negative relative to the blast room, it can draw that dust straight in. We look at the air balance between the two spaces, how doors and vestibules are arranged and whether the coating area needs a slight positive pressure.
- Separate the blast and coating areas with walls or curtains
- Keep the blast room slightly negative to its surroundings
- Avoid coating-area exhaust pulling across the blast door
- Add a blowoff station between blast and coat
Collector air and building balance
The dust collector moves a large volume of air out of the room. Whether that air is discharged outside or returned to the building through final filters affects make-up air and heating. We look at the collector discharge alongside the coating line's exhaust so the building stays balanced.
Interlocks and controls
Blast rooms commonly interlock the blast equipment with the ventilation, so blasting cannot start until the collector is running. Door switches, lighting and recovery equipment controls round out the panel. We wire and connect the mechanical side so the room starts in the right order.
Planning a booth or oven project in Ohio
Crews mobilize from Houston; Ohio is roughly 1,000 miles away, so equipment, panels and tooling are staged and shipped ahead of the install crew.
Manufacturing in Ohio is concentrated around Columbus, Cleveland, Cincinnati, Dayton, and Toledo. The sectors most likely to be specifying spray booths, blast rooms, powder systems and cure ovens there include automotive assembly and suppliers, aerospace, steel and metal fabrication, and semiconductors.
Cold winters mean make-up air heaters are sized for sub-freezing intake, and booth or oven placement has to account for frost lines, snow loads on roof penetrations and winter slab work.
Frequently asked questions
How close should the blast room be to the coating line?
Close enough that parts move directly without long waits, but separated well enough that dust does not migrate. A transfer path and a wall or vestibule between them is a common arrangement.
Why is blast dust showing up in our powder finish?
Often it is an air balance issue, with the coating area pulling air from the blast room. Checking pressure relationships and door arrangements usually points to the cause.
Can the dust collector return air to the building?
Some systems do, with final filtration. Whether it is suitable depends on the dust, filtration and your plant's requirements.
Do you connect the blast room to an existing conveyor?
We coordinate the room's doors and openings with the conveyor or cart system so parts move between them cleanly.
What controls does a blast room need?
Typically ventilation interlocks, lighting, recovery equipment controls and door switches. The exact controls depend on the blast equipment and your plant's practices.