To ensure the dispensing process runs continuously and without interruptions, even during barrel changes, we offer refills from the delivery containers. Various configurations are available for refilling.
Automatic refilling with and without vacuum or vacuum assistance
- Dosing containers are connected to a mobile refilling station with coupling systems, if necessary, to prepare the dosing containers for the next dosing application.
- The permanently installed stainless steel dosing drum is continuously filled from 200-liter delivery containers by the integrated refilling station. This means that the dosing containers are permanently kept in the dosing unit. No process interruption is necessary when changing drums.
Both versions are available with manual venting of the refill container or vacuum-assisted drum changes or vacuum barrel changes using maximum vacuum.
The control system handles automatic refilling so that the dosing container always has sufficient material available for a continuous dispensing process, even during a drum change.
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Air and humidity in the material reduce material quality and process stability. If the material is freed of this interfering air before processing with a TAVA F, you create the best conditions for the actual application.
In addition to material optimization, the TAVA module can also be used for vacuum drum changes on dispensing systems. The TAVA module guarantees that no air enters the dispensing system and thus the process during drum changes. Complex and manual drum venting, with the potential risk of splashing and contamination of the system operator, as well as potential material loss, is completely avoided. This reduces material costs and significantly improves the environmental impact of the processing process.
- Drum changes without any air pockets
- Maximum occupational safety, no risk of splashing and no contamination
- Guaranteed process reliability for subsequent applications
- Cost reduction, as material residues in the inliner of the empty container can be fed into the new delivery container. Introduced air bubbles are eliminated again under full vacuum
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In order to be able to process non-flowable material at room temperature, it is often necessary to heat the tank and hoses. In order to protect sensitive material, a melting unit of the follower plate can melt / liquefy exactly as much material as is actually processed. The remaining material in the drum is not unnecessarily affected, as would happen if the tank were completely heated. In addition, time is saved because production can be started faster.
In order for the system to function, all other components, such as hoses and mixing head, must be equipped with a heater to prevent cold spots and thus guarantee optimum mixing of the components.
This melting unit is interesting for applications such as
- hot-cast adhesive
- hotmelt
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A vacuum is created between the material surface and the follower plate. The follower plate is lowered in a controlled manner only after the maximum or desired (adjustable) vacuum has been reached. The vacuum is regulated and controlled at all times until the follower plate is in contact with the material surface. This ensures that NO air enters the process!
This system ensures absolutely reliable drum changes in follower plate systems for highly viscous components. Furthermore, we increase work safety; there is no material loss and no risk of splashing.
An overview of drum change systems can be found here:
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Vacuum-assisted follower plate venting not only increases process and work safety but also reduces material loss.
The follower plate is drawn to the material surface by sucking in the air between the material surface and the follower plate until it sits flush with the material. This drum change procedure is user-friendly, prevents dangerous splashes, and minimizes material loss, as no material needs to be vented via a ball valve or similar outlet.
The machine operator can be confident that there is virtually no harmful air between the follower plate and the material surface that could interfere with the pumping process. The air is sucked out at the push of a button. No manual intervention is required. However, to ensure that no air is introduced into the dispensing system, we recommend vacuum drum changing (drum change with full vacuum).
You can find more information on the subject of “drum change” here:
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- Quality-impairing air and humidity are removed from the resin
- Improved manufacturing process
- Enhanced product quality
Process-integrated evacuation of air and moisture from synthetic resins and hardeners before dosing and mixing with the T-EVAC degassing station.
With this module you can significantly improve your forming processes as well as your product quality. The new degassing station is suitable for both epoxy resin and polyurethane resin degassing.
The system solution is designed in two variants: First, as an offline degassing at a central location where several dosing units can be filled with degassed material. Second, as an inline degassing directly integrated into the dosing system and adapted to the process requirements.
Measurably better results with degassed material
Material test: Optimal result with degassed resin and hardener
Test result without degassing: visible air inclusions (light discoloration)
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Liquid components
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All machine parts, from the container to the hose and mixing head, can be heated to reduce the viscosity of the material – for example, to shorten the pot life or improve mixing of the components. Depending on the application, there are several options available.
Container
- Jacket heating (adapted to the container)
- Double jacket (heating with water or oil)
- Extra agitators for a better heat distribution
Hoses
- Heated hoses
- Insulation
Depending on the sensitivity of the material, all possible cold spots must be additionally heated or insulated. Heating cartridges, ring heaters and heating tarpaulins are used in this process.
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Liquid components, Pasty components
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Depending on the size and location/purpose of the system, it must be mobile. There are several options for achieving mobility:
- Mobile frame
- Dedicated drive unit
- Trailer coupling for universal tractors, movers, etc.
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Liquid components, Pasty components
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Machines with flow control continuously measure the material flow rate and report any deviations to the dosing pump drives, which automatically adjust the flow rate accordingly. This happens within fractions of a second, guaranteeing consistent output and optimal mixing ratio accuracy.
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Liquid components, Pasty components
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To keep the dosing process running longer, we offer refills from IBCs or drums. There are different solutions for the realization of a refill.
Automatic Refill
- 1st option: Dosing containers are connected to a mobile refilling station (modern connection with couplings without loss of material)
- 2nd option: Dosing containers are connected directly on the base frame with e.g. an IBC
- 3rd option: Refill containers are also located on the base frame
The process is controlled via automatic refilling e.g. when a minimum sensor level is reached.
Vacuum Refill
If the material must not come into contact with air, we offer dosing containers in vacuum atmosphere. When refilling, the negative pressure is used to “pull” the material out of the refill containers.
Free Refill
The free refill, also called “free-flow”, uses gravimetry. The material flows from the higher positioned refill container into the dosing containers. No pump is required.
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Liquid components
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