The dispensing head is the main item in any dispensing system. By including the gear wheel pump in the continuous-path control, volumetric dispensing is guaranteed at all times, independent of changes in speed. The design of the patented gear wheel pump allows viscosity fluctuations of the dispensing material to be compensated, and the control engineering running in the background compensates for the thixotropic material behaviour. Start / Stop, cross or T points are optimised using special software functions so that the fusion spots melt into each other. The material is fed by means of either cartridges, pails or up to 200 litre tanks. Dispensing heads are available for almost all conventional 1C materials, such as silicones, MS polymers, UV adhesives and sealants, hotmelts, 1 C-PUR as well as POP-copolymers.
The dispensing head distinguishes itself by its highly precise, digitally controlled gear wheel pump, which is controlled by the DATRON iServo motor. A DATRON dispensing head is well suited for dispensing all conventional 1C materials, such as silicones and MS polymers in the viscosity range of 100,000 - 1,000,000 mPas. The digitally controlled iServo motor is able to position the gear wheel pump to a precision of 1/40,000 turn. This allows the smallest amounts to be dispensed in a process-sure way. Non-linear flow properties of the material can be compensated with the software.
By means of a highly precise gear wheel pump, low-viscosity media without fillers having a viscosity of 1 up to 100,000 mPas can be dispensed.
Depending on the needed volume, there are three pump sizes to choose from.
Dispensing ranges are available from 0.06 cm³ to 0.6 cm³. This DATRON dispensing head is especially suited for dispensing low-viscosity adhesives, paints, greases or oils.
The hot-melt dispensing head was specially developed for dispensing hot-melt adhesives.
The dispensing material is heated up externally to the processing temperature and can be fed through a heated hose. An electronic thermostat controls the temperature of the dispensing pump and regulates it automatically. The temperature is kept constant this way, which guarantees clean processing.
The precision gear wheel pump with an electronic control system allows a dispensing precision in the mg range and is well suited for dispensing small amounts.
All components, such as the iServo motor, gears, and positioning control with amplifier are enclosed in a compact aluminium housing.
The DATRON spray head allows low- to medium-viscosity media to be sprayed onto the dispensed part.
Two cartridges are attached to the dispensing head, which can be separately pressurized. A back-pressure valve makes sure that only one spray medium is fed to the nozzle.
One cartridge is filled with the spraying medium;
the second with a cleaning medium. This is for rinsing out the spray head after the end of a dispensing process.
The switching process of the pressurization is driven by software and is realized with magnetic valves.
To make it easy to exchange the cartridges, they are fixed with blocking rapid action hose couplings, which prevent dripping.
The processing of abrasive media (which are enriched with fillers) cause problems for many dispensing system manufacturers. DATRON has patented a special pump for this, which combines high volume consistency with low operating costs and easy cleaning. The mechanical structure allows filled materials in the viscosity range from 100,000 - 1,000,000 mPas to be optimally dispensed up to a maximum grit size of 50 µm.
The digitally controlled iServo motor is able to position the gear wheel pump to a precision of 1/40,000 turn. This allows the smallest amounts to be dispensed in a process-sure way. Non-linear flow properties of the material can be compensated with the software.
The EMI seals are extraordinarily efficient and especially soft after the "coextrusion process". Hereby, a soft core made of silicone is encapsulated with the conductive EMI material. This leads to cost-effective production and much softer beads than with conventional methods.
The direct manufacture and application of these conductive sealing heads is possible with the iVD2 combination dispenser. Perfected control engineering allows the wall thickness and material conditions to be precisely set. In the range of 0.8 mm to 5 mm bead diameter, there is no process for "form in place" shielding that is more efficient.
This procedure can also be used for other combinations of materials.