“HOT-MELT LINE®”
Introduction to the electrostatic deposition of "HOT-MELT" lubricants
In the last times we are receiving more and more inquiries for oilers capable to apply a new class of products which are solid at room temperature and which have a pour point in the range 30 - 50 °C.
These new lubricants are requested more and more by top class car manufacturers both for galvanized steel and aluminium due to the many advantages offered and with the aim to use the same lubricant for both metals.
Picking up past experiences from our long tradition in the electrostatic application of any kind of products we designed an original machine with the following basic characteristics:
- Applicable products: “Hot-Melt” and conventional oils.
- Fast changement from “Hot-Melt” to oil and vice-versa.
- Machine simple to run and service.
The first machines of our make installed in lines of very demanding customers proved to be completely satisfactory and fulfilled all the requested parameters.
Our machines work on the principle to melt and keep melted at controlled temperature the solid material throughout the complete circuit including melter, pumps, filters, blades and oiling enclosure body so to apply it as a conventional oil by means of the electrostatic field.
The machine can be stopped when needed also for long periods of time and restarted without any difficulty in the comparatively short time required to self remelt the lubricant solidified in the machine circuits.
The machine is fully automated by means of a PLC controlled and monitored by a supervising PC.
All functions, working parameters and alarms are clearly shown on the PC colour screen.
The other known possibility to coat metal strips with Hot-melt is to use a water dispersion of the lubricant instead of the 100 percent solid material.
The water dispersions can be applied using electrostatic high-speed bells systems similar to the ones used for water-soluble paints and oven dried after application to evaporate the big percentage of water contained in the wet film.
Although we have long experience in this type of application we do not recommend it for Hot-melt due to the many disadvantages inherent to the system in comparison with the solid product application.
Mainly:
“HOT-MELT LINE” is a registered trade-mark and these particular oilers are covered by international patents.
Introduction to the electrostatic deposition of "HOT-MELT" lubricants
In the last times we are receiving more and more inquiries for oilers capable to apply a new class of products which are solid at room temperature and which have a pour point in the range 30 - 50 °C.
These new lubricants are requested more and more by top class car manufacturers both for galvanized steel and aluminium due to the many advantages offered and with the aim to use the same lubricant for both metals.
Picking up past experiences from our long tradition in the electrostatic application of any kind of products we designed an original machine with the following basic characteristics:
- Applicable products: “Hot-Melt” and conventional oils.
- Fast changement from “Hot-Melt” to oil and vice-versa.
- Machine simple to run and service.
The first machines of our make installed in lines of very demanding customers proved to be completely satisfactory and fulfilled all the requested parameters.
Our machines work on the principle to melt and keep melted at controlled temperature the solid material throughout the complete circuit including melter, pumps, filters, blades and oiling enclosure body so to apply it as a conventional oil by means of the electrostatic field.
The machine can be stopped when needed also for long periods of time and restarted without any difficulty in the comparatively short time required to self remelt the lubricant solidified in the machine circuits.
The machine is fully automated by means of a PLC controlled and monitored by a supervising PC.
All functions, working parameters and alarms are clearly shown on the PC colour screen.
The other known possibility to coat metal strips with Hot-melt is to use a water dispersion of the lubricant instead of the 100 percent solid material.
The water dispersions can be applied using electrostatic high-speed bells systems similar to the ones used for water-soluble paints and oven dried after application to evaporate the big percentage of water contained in the wet film.
Although we have long experience in this type of application we do not recommend it for Hot-melt due to the many disadvantages inherent to the system in comparison with the solid product application.
Mainly:
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The oiling enclosure needed has a volume 20-30 times bigger than an enclosure for the solid product.
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Lot of high speed bell units requiring accurate speed control, an accurate and costly maintenance and many expensive wear parts.
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Much more overspray to be collected by painting like exhaust systems, practically impossible to recover and expensive to get rid of in an eco-compatible way.
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Cumbersome and expensive high-voltage isolating systems due to the high conductivity of the water dispersions.
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Huge and energy consuming drying oven to evaporate water from the deposited film.
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Difficult house-keeping due to the fact that most of the overspray sticking on walls and gratings is insoluble in water so to require mechanical cleaning and/or the use of solvents.
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Some water is always left in the dried film with possible damages to the metal surface during coils storage a fact that is not appreciated by the car manufacturers.
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“HOT-MELT LINE” is a registered trade-mark and these particular oilers are covered by international patents.
