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[Actual Problems]On-site Environment Problems

Actual methods used in real work sites to solve the problems are shown on this page. It also introduces the tricks behind the on-site improvements.

Installing Lasers for Use with High-temperature Workpieces

Problem 1

We manufacture casted products. At the moment, we engrave finished products, but we are considering performing laser marking immediately after the products have been cast in order to mark them with 2D codes and thereby enable in-process control.
However, the products reach temperatures of hundreds of degrees Celsius immediately after casting, so we are concerned about the laser marker's heat resistance. What should we do?


We recommend that you emit the laser through glass to perform marking!

There is no problem with marking products immediately after they have been cast. However, if the temperature of the products reaches several hundred degrees, the temperature of the surrounding environment will also increase and will greatly exceed the ambient operating temperature of the laser marker, which will render it unusable. As a countermeasure to this problem, you can insert a piece of heat-resistant glass between the product and the laser marker. Normally, a YVO4 laser or a YAG laser having a wavelength of 1064 nm is used for marking metal. However, this wavelength has the major characteristic of "easily passing through transparent objects," which enables this installation method.

Enabling Marking on High-temperature Workpieces Immediately after Casting

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Installation in Environments with Splashing Oil

Problem 2

We are considering an inline laser marker installation, but can a laser marker be used in an environment with splashing machine oil?
We are thinking about placing protective glass in front of the lens, but we know that the periodic cleaning required will be a hassle, so we are concerned about whether the people in charge of maintenance will clean the protective glass correctly.


We recommend using an oil-protection cover!

Cleaning is a hassle, even more so in an inline installation.
By preventing oil splashing from the surrounding area from affixing to the lens, you can ensure that the laser marker remains maintenance-free. It may also be effective to air purge the inside of the cover.

We recommend using an oil-protection cover!

Because the laser marker is maintenance-free, it is desirable to minimize the time spent performing maintenance as much as possible.
Your problems can be solved with KEYENCE's know-how.

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Preventing Marking Waste and Fumes from Affixing to Products

Problem 3

We are considering using laser markers to cut transparent film, but no matter what we do, the fumes during laser processing affix to the products and make them cloudy.
Is cutting with edged tools really the only method we can use?


We recommend a 9.3 μm wavelength laser that is suited to resin products!

The fumes generated when the laser is emitted are caused by sublimation due to the heat of the laser.
A 9.3 μm short pulse width laser has good heat absorption characteristics, which enables cutting without applying unnecessary heat. This means that unnecessary fumes will not be generated.
As such, the cutting quality will be sharp and the affixing of fumes to the product will be minimized.
In addition, you can obtain even better results by using a KEYENCE static eliminator.

Laser Cutting Advantages

We recommend using an oil-protection cover!

  • - Reduction in costs of creating expensive molds
  • - Stable quality thanks to the elimination of maintenance requirements
  • - Simple tooling changes accomplished just by switching the data

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Marking Waste Collecting on Guides

Problem 4

We are using laser markers to mark resin connectors, but the marking waste collects into deposits. We perform cleaning periodically but marking defects still occur.
Even setting the dust collector to high power doesn't have much of an effect...
Do you have any suggestions for things that we can try?


There are two methods. (1) Use a 9.3 μm short pulse width laser. (2) Manipulate the guides.
  1. A 9.3 μm short pulse width laser has good heat absorption characteristics with resin, so unnecessary fumes will not be generated. Decreasing the amount of fumes will prevent the marking waste from collecting into deposits.
  2. Marking waste collects on the guides because the fumes created through sublimation are cooled by the guides. You can prevent marking waste from affixing to the guides by separating them from the product and warming the guides.

There are two methods. (1) Use a 9.3 μm short pulse width laser. (2) Manipulate the guides.

Your problems can be solved with KEYENCE's know-how.
We will provide you with an optimal proposal that matches your work site.

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Feel free to contct us. 1-888-KEYENCE(1-888-539-3623)

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