APPLICATIONS

Rust Preventive Oils and Preservatives

Example 1

User
Manufacturer of steel plates for construction
Application
Rust prevention
Model used
ST-6R-0.5X

Problem

On a type of construction material called a flat deck that is used in the floors of buildings, the sections that touch concrete are prone to rust and require rust prevention treatment. This manufacturer had previously been using a spraying device for rust prevention treatment, but they were unable to coat only the protruding portions created by press working (which were 36 mm wide). Also, mist overspray was causing their production site to get dirty.

Problem illustration figure

Lumina’s proposal and result

We proposed Lumina’s standard round pattern spray gun, the ST-6R. One ST-6R was installed at each of three points in line with the protruding portions of the flat decks as they were conveyed past. In order to prevent the spray from growing wider than 36 mm, we suggested a close target distance of 20 mm and a low amount of liquid.

(Spraying conditions)
  • Atomizing air pressure: 0.03 MPa
  • Target distance: 20 mm
  • Liquid provision method: Gravity feed container

As a result, we provided a system that effectively coated only the protruding portions of the flat decks with rust preventive oil.
Also, the extremely small atomizing air pressure of just 0.03 MPa provided a soft mist of very large droplets that coated delicately and eliminated overspray.

Example 2

User
Major lumber factory
Application
Providing coatings of anti-mold agent
Model used
ST-6-2.0X

Problem

This manufacturer makes wooden spools for electric power and communications cables. They had previously been coating the lumber with anti-mold agent manually, using rollers. In order to decrease employee workload and increase productivity, they needed to automate that process.

Problem illustration figure

Lumina’s proposal and result

We proposed Lumina’s standard flat-fan pattern spray gun, the ST-6. They wanted to coat with a large amount of liquid, so we recommended the maximum nozzle size, 2 mm . They installed two spray guns on bottom and two on top. The four spray guns completely coated both sides of the 400mm wide lumber with anti-mold agent as it was being conveyed past them on a belt.

(Spraying conditions)
  • Atomizing air pressure: 0.05 MPa
  • Liquid pressure: 0.05 MPa (using 20 L pressure feed tank)
  • Target distance: 300 mm

As a result, their employees no longer had to coat the lumber manually, greatly improving work efficiently. Also, by setting the atomizing air pressure low at 0.05MPa, we created a soft mist that did not cause overspray.
This improved coating efficiency, decreasing the amount of anti-mold agent used.

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