Introducing the transport type drying oven that is ideal for drying moisture proofing agents such as Humiseal.

Please be sure to read this before considering automating desiccant drying.

 
In order to automate the natural drying of moisture-proofing agents such as HumiSeal, an increasing number of sites are switching to transport-type drying ovens. The drying time of a desiccant agent, which used to take hours to dry naturally, can now be dry to the touch in just a few minutes, so the benefits of automating the drying process can be said to be huge. . In addition, as a countermeasure against odors, the odors can be sucked out from the duct of the drying oven, so it can contribute to improving the environment at the site.
 

If you just want to dry it, you can use an inexpensive drying oven.

For 49 years, our company (ANTOM Co., Ltd.) has been a specialized manufacturer of heating furnaces, and we have cultivated know-how and track record by dealing with a wide variety of heating applications required by many customers. That’s why we truly understand the difficulty of utilizing heat. Even if the purpose is “just drying” as in drying applications, it is by no means easy to achieve that purpose with a high degree of perfection.

However, this simple purpose of “just drying” is a factor that distracts customers from awareness of the problem, and gives them the wrong impression that drying a moisture repellent is easy.

For example, if you are considering installing a drying oven at a site where moisture-proofing agents are being naturally dried, there will be almost no cost since the drying process is currently being done naturally. The cost of installing a new drying oven will be a high hurdle for customers. As a result, people choose to install inexpensive drying ovens to reduce costs as much as possible.
 

We conducted a drying experiment using our inexpensive drying oven.

We have been receiving requests from some customers for some time to provide inexpensive drying ovens. In order to meet the needs of our customers, we decided to start selling low-priced drying ovens. (Released in October 2023) The photo on the left is a low-priced drying furnace sold by our company, with a list price of 2 million yen, a model that has thoroughly reduced costs.

In conclusion, if you just want to “dry the moisture-proofing agent,” you can probably achieve your goal with an inexpensive drying oven. In addition, the environment can be improved by sucking the odor peculiar to moisture repellents through the exhaust duct installed in the drying oven. For customers who think that achieving that purpose is sufficient, an inexpensive drying oven is fine.

So what exactly is the problem? In order to help you understand the problem, we would like to present the results of an actual drying experiment of a desiccant agent using the above-mentioned low-cost drying oven.
 

Many bubbles appear after drying

The photo on the left shows a board coated with a moisture-proofing agent and dried in an inexpensive drying oven. You can see that there are so many bubbles that they can be seen even at a visual level. Our low-priced drying oven has a small number of zones (3 zone configuration), so in order to achieve rapid drying, it is necessary to set a high temperature in each zone. I believe that this causes the moisture proofing agent to heat up rapidly and cause it to foam.

The moisture proofing agent under large parts such as transformers and in gaps is not dry.

After placing the transformer on top of the moisture-proofing agent applied to the board and drying it in an inexpensive drying oven, I checked the bottom of the transformer and found that the moisture-proofing agent was still undried. It’s so dry that when you tilt the board, the moisture proofing agent drips. (*Left photo) Similarly, it has been confirmed that there are areas where the moisture proofing agent that has entered the gaps between parts has not yet dried because the heat has not reached it.

 
If you are concerned about the quality after drying, the way you apply heat is important.
A low-cost drying oven is sufficient for drying under limited conditions (using a specific moisture-proofing agent) or for odor control, but in order to solve the problems raised in the above experimental results, a suitable drying oven is required. The number of zones and thorough temperature control are absolutely essential.
 

ELNAS is a high-performance rapid drying oven that enables temperature control necessary for high-quality drying.

ELNAS has a track record of drying many moisture proofing agents. This can also be said to be a major difference between ELNAS and a simple drying oven that can only dry specific moisture-proofing agents.

Here we have prepared a video of an experiment in which we actually used ELNAS to dry several moisture proofing agents, so please take a look. There are three types of moisture proofing agents used in this experiment: HumiSeal, Elep Coat, and Haya Coat.
 

Many bubbles appear after drying

ELNAS has 5 heating areas, and can control the temperature in each area continuously. Therefore, under the circumstances of low transport speed and high temperature, it is possible to prevent sudden heating and foam formation. In addition, the unique heating method used in the past (micro-heating wind and continuous heating) allows the formation of a surface film on the surface of the tide barrier. * Under the circumstances of using a hot wind drying box, the surface film of the anti-tidal barrier can be used to discharge the bubbles, and under certain circumstances the bubbles can expand as the process progresses.

The moisture proofing agent under large parts such as transformers and in gaps is not dry.

Far-infrared heating, which is the biggest feature of ELNAS, allows heat to easily penetrate into the interior, making it possible to thoroughly dry moisture-proofing agent that has accumulated under large parts such as transformers and in gaps. I used ELNAS to dry the transformer with the transformer placed on a board coated with a moisture-proofing agent, and even when I tilted the board after drying, the moisture-proofing agent was dry enough that it did not drip. *In the case of a drying oven that only uses hot air, the hot air is blocked by large parts and the hot air cannot reach the feet, resulting in undrying.

What did you think?
You should now understand how important heat application and temperature control are in the drying process.
 

ELNAS is a high-performance rapid drying oven that enables temperature control necessary for high-quality drying.

ELNAS has a track record of drying many moisture proofing agents. This can also be said to be a major difference between ELNAS and a simple drying oven that can only dry specific moisture-proofing agents.

Here we have prepared a video of an experiment in which we actually used ELNAS to dry several moisture proofing agents, so please take a look. There are three types of moisture proofing agents used in this experiment: HumiSeal, Elep Coat, and Haya Coat.
 

 
Click the play button in the center of the screen below to play the video. (This video has no audio)
 

Verification of Humiseal dryness level to the touch (no bubbles)

This is a video that verifies the drying state by applying HumiSeal (1B51NSLU / 2:1 formulation / viscosity 70mPa・s) to a part of the board and putting it into the drying oven (ELNAS). Since this is a dry test, I applied a large amount of HumiSeal to make it easier to understand.

Verification of dryness level of Elep Coat to the touch

This video shows the drying state of a part of the board coated with Elepcoat stock solution (LSS-520MHB / viscosity 400mPa・s) and placed in a drying oven (ELNAS). We applied a large amount of undiluted Elepcoat, which has a high viscosity, so we conducted drying tests under severe conditions.

Verification of dryness level of Hayacoat (spray type) to the touch

This is a video that verifies the drying condition by applying Hayacoat (spray type) to the entire board and placing it in the drying oven (ELNAS). Since it is a spray type, bubbles will be noticeable on the surface of the board after application.

Drooping test movie under transformer

This is a video that examines the dry conditions under the transformer introduced above. Watch the video and you’ll understand why ELNAS’s 5-zone heating is necessary.

Smoke absorption verification movie using exhaust duct

For your reference, ELNAS is not only suitable for drying, but also for smoke absorption through the exhaust duct as a countermeasure against the odor peculiar to moisture-proofing agents. Check out this video to see how much smoke you actually smoke.

If you are interested in ELNAS, a high-performance rapid drying oven that achieves overwhelming drying, please contact us using the form below.

The biggest feature of ELNAS is far-infrared heating, which allows the heat to easily penetrate into the interior, thereby thoroughly drying out the moisture-proofing agent accumulated under and in the gaps of large components such as transformers.

By using far infrared rays, heating capability can be ensured while suppressing the negative impact of breeze on the solvent. As shown in the video above, ELNAS can be installed by placing the transformer on a board coated with moisture repellent. After use and drying, the moisture barrier is dry enough and will not drip even if the board is tilted after drying. *If it is a drying box that only uses hot air, the hot air will be blocked by large parts and the hot air cannot reach the feet, resulting in non-drying.

In addition, the ELNAS transport port has 100 mm of clearance above and below the workpiece, so tall parts can be transported easily.
 

关于ELNAS系列的规格

High-performance rapid drying furnace ELNAS high-performance rapid drying furnace under pressure.

For inquiries regarding the heating equipment (small reflow, drying oven) or peripheral equipment provided by our company, please use the form below.
Please feel free to contact us for consultations regarding the introduction of heating equipment, as well as demonstrations using actual equipment and profile measurements.