Three Roll Mills: Their mechanism, advantages, types, and tips to find the best product

Three roll mills are highly used in modern times for mixing printing inks, electronic film ink, high-end ceramics, paints, chemicals, adhesives, pharmaceutical products, coatings, sealants, etc. With advancing technologies, these are used frequently for cable cover, soap, plastic, and production of electronics products. In short, three roll mills are one of the high utility products.


It’s the mechanism or the construction of these mils that enables it to rotate at a considerably superior speed. In general, the materials in paste form are delivered through the feed and center roll. It’s the lesser space among the rolls is the reason that the large percentage of paste in general stays within the feed zone.
The three-roll mills that are used in the process of dispersing assure about the entire product passing through both of the shear zones. Basically, the shear rate is the key factor that plays a decisive role in the process. The same can be determined through roller spacing, as well as the speed in the circumference. In fact, simply upon keeping the energy input under control, one can expect utmost precision in the process.
3 roll mill


• User-friendly:

Three roll mills are thoroughly advantageous for their ability to mill the pastes with high viscosity. Interestingly, its superior surface contact having a cooled roller makes it possible the keeping the temperature low, even if dispersion work of a greater amount is put in. The higher surface area is also one of the prime reasons behind the user-friendly characteristic of these mills.

• Flexibility

Interesting aspect about the three roll mill is that here one can adjust and also maintain the gaps in between the rolls in a mechanical way. In general, the size of the gap is way bigger than that of the size of the particle. In certain cases, the distance of the gap is strategically minimized in order to attain a specific level of dispersion. Generally, the rollers remain water-cooled internally.

• High utility:

Coming to usage, the three roll mills are frequently used in chemical industries of different levels, ranging from those with medium level viscosity production to that of high level. Using high-end machinery, one can break down a whole range of pigments, inks, paints, as well as lubricants.
This can attain the ultimate level of fineness desired for the cosmetic as well as electronics industry. All the models of three roller mills, irrespective of the model, are equally user-friendly and productive in nature. Each of these has its own significance in accordance with the purpose they do serve.

• Provides greater flexibility as per production volume:

Best part about the three roll mill is that there remains flexibility to select the right kind of model in accordance with the volume of production. For example, the small bench types are meant for works related to development of bench-top, laboratory works, as well as for production of low volume. Similarly, the large bench models, as well as the floor models, are made for meeting well with various kinds of production demands, ranging from pilot plants to produce in large volumes.

Types of three roll mills

• SG roll mills

Basically, SG roller mills are the upgraded versions of the S triple roll. In case of three roll mill, the gap within the roller is adjusted using the flexible wheels. SG machines do deliver gears that immerse within the oil, thus maintaining the endurance of operation and causing lesser noise.
There remains a control system that can very easily keep check of the temperature of the materials. In general, all three rolls remain interconnected with the Chiller. It usually reaches 10 to 20 um through initial passing grinding. To be specific, these roller mills are hugely used in the printing and soap production industries.

• Hydraulic roll mill types

Coming to Hydraulic types, these are auto-controlled equipment that is fully hydraulic in nature. For every roller, there remains a distinct cooling system. There remains a pressure blade for hydraulic control, roller gaps, etc. Overall, this type of three roller mill is equally user-friendly in nature as well as of the others.

• Lab type roll mills

Lab type roll mills having PLC touch display are frequently used among various industries, ranging from pharmaceuticals, cosmetics, ink, and also among electronic industries. Being smaller in size and with digitized automated functions, these are much faster, advanced, and safer in nature. This can be customized for material needs of various kinds.

• Vertical roller mills

There are vertical roller mills that are excellent for powder grinding, as well as chocolates. In this segment, one can have 3, 4, as well as 5 rollers that all fall under the vertical category. These are highly useful among the soap as well as chocolate industries.

• Heating type

There are three roll mills available of heating type as well, excellent for rubber, PVS, as well as a color masterbatch. It’s the characteristic of this machine to grind materials of higher viscosity, the design of gear quality matters the most here. In general, these are heated using oil, though steam can be used as well. Good news is that these machines have started surfacing with automated functionality as well.
three roll mill

Tips for finding the best device

Three roller mills are indeed highly useful machines. But, one needs to be careful enough while selecting the right machine to expect the best output. Most importantly, it is suggested to check the feeding system well as this is crucial in terms of enhancing performance. One can easily find materials of different levels of viscosity.
In general, the feeding units are installed over the top using one reducer motor. One needs to be a bit strategic as well in terms of settings to obtain productivity of highest level. It depends upon the viscosity level and production as well. For example, when the viscosity level is high and the batch production is small, it is suggested to feed material within the rollers using a manual scrapper.
Apart from these, packaging is an equally crucial aspect as well that needs to be addressed while importing these machines. In this context, it is always suggested to go only with those manufacturers having a proven track record. Franli is a highly reckoned chemical production line manufacturer based in China with a significant reputation in Three Roll Mill machinery manufacturing.

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This article is published under the authorization of the author.
Source: Franli

This article address : Three Roll Mills: Their mechanism, advantages, types, and tips to find the best product

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