Machine coolant to avoid fungal prevention is better than cure

Microbes are everywhere in nature, and fungi are one of them. Fungal problems are usually particularly pronounced under favourable climatic conditions such as the rainy season or during the sowing and harvesting seasons. Fungi are propagated through spores, such as mushrooms, yeasts and molds. These sporozoites are very viable and can survive extreme temperatures, and they can easily spread in air and liquids. They usually grow in warm, humid, dark places, etc. The machine coolant tank is a good place for fungi to breed, so fungi are also common in machine tools. However, if not treated in time, severe fungal growth can cause other problems such as clogging of filter media and coolant nozzles. As long as it is found to be timely and take positive measures, this problem can be solved smoothly.

Fungi consist of a network of fine hyphae that are sourced from biological corpses or living organisms. Fungi can cause great damage to the organisms they erode. Once infected by a fungus, it is quite difficult to remove the fungus because it is difficult to remove the hyphae or penetrate the hyphae through the chemical after the hyphae structure of the fungus is formed.

In the metalworking industry, fungal problems are prone to occur due to the warm, humid and dark environment. When the fungus in the machine tool multiplies, it is not only smelly, it is a health problem, but also has a negative impact on the entire process. Since fungi can engulf various components in metalworking fluids, these problems occur:

Fungi reduce the pH of the coolant, which is more conducive to the reproduction of other microorganisms.

2. The fungus causes the emulsion particles to become large, causing an increase in the amount of coolant taken out or a deterioration in processing properties.

3. After the key components of the metalworking fluid are swallowed by the fungus, the daily addition will increase.

4. The mycelium of the fungus will block the nozzle or filter medium, causing the coolant supply to be interrupted, resulting in insufficient cooling and lubrication of the tool surface, or even normal processing.

5. Fungi can cause black rust and etch pits on the cast iron surface.

It is not easy to detect fungi. A microscopic tablet such as "Biostick" is usually used, and one side of the agar medium is exclusively used for fungi. If a fungus adheres to the medium, the fungus can be detected as long as the fungus grows on it. The test piece needs to ferment the agar according to the specified conditions. Due to the slow growth of the fungus, it is generally necessary to observe the results of the fungal surface on the microplate after three days. (Refer to the manufacturer's instructions for the specific method.) Because fungi can form hyphal structures, they are not easy to flow freely compared with bacteria, so they may multiply in the coolant but cannot be detected by the bacteria. . It is recommended that if any signs of fungi are found, whether there are signs of fungi on the specimen or on the spot, action should be taken.

As the title of this article says, prevention is better than cure. In order to avoid the trouble of coolant fungus, it is necessary to briefly introduce some basic principles of fungal growth.

Typically, the coolant maintains a certain level of bactericide, amines and pH to inhibit fungal growth. But if some of these parameters are lower, the fungus will multiply.

2. If the coolant is not fully circulated, the fungus will breed in those areas. If there is some part of the system, the coolant cannot be contacted in a wide range; or because of insufficient production tasks and long downtime, fungi are more likely to occur.

3. If the machine has residual liquid during cleaning, these microorganisms are hidden in the coolant and will quickly grow in the new coolant. Especially fungi, it takes a lot of time and effort to penetrate the inside of the hyphae and completely kill the fungus.

4. The leakage of oil from external pollutants such as hydraulic oil or poor daily cleaning will provide an excellent source of food for fungi breeding.

It is best to avoid these situations. As mentioned above, the sterilization process is quite complicated due to the inability to directly contact and penetrate into the interior of the fungus. There are a variety of fungicides available on the market, but they are costly and should be used with special care. We recommend the following precautions to avoid fungal problems:

Choose a biostable product. This type of product does not control fungi by means of fungicides or the like. In addition, the correct daily management of the system is also the best solution.

The design of the pipeline or filter should be reasonable to avoid dead zones. Also avoid keeping the coolant stationary for long periods of time. During the holidays it is recommended to turn on the circulation pump to circulate the coolant for a certain period of time, or at least a small amount of air or start the scraping device to allow a certain amount of circulation of the coolant.

The machine should be thoroughly cleaned, including sterilization with a machine cleaner containing a biocide. If large pieces of fungus are found, they should be removed.

Minimize pollution. Take appropriate measures to reduce system oil spills or other sources of external pollution.

In summary, we do not want fungal growth in the use of medium metalworking fluids, which can increase manufacturing costs. Therefore, a targeted prevention program ensures that your machine is functioning properly, extends coolant life, and supports company safety and profitability.

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