Loudspeaker Bonding in Perfection!


preeflow® dispensers impress in their application



For  years preeflow  dosing technology by  ViscoTec  stands for precise micro dispensing of small and smallest amounts. In addition to various fluids, all liquid adhesives, for example UV adhesives or 1K and 2K adhesives, can be dispensed precisely.



Thanks to its experience and reliability preeflow is the perfect partner in numerous dosing applications – this also includes the field of loudspeaker bonding, especially in the premium sector. A great value on exact processing is placed here to achieve an outstanding sound experience and create long-lasting  products. The loudspeaker manufacturer’s latest technical innovations place high demands on every single components. That's why top quality and reliability are required from for example pot, membrane and cover. Ensuring the quality of the complete finished product starts at the beginning of the process chain. Adhering or rather adhesive application is one important point here.



High requirements to the dosing technology



On one hand the bonding has to resist external environmental influences like high temperature variations, vibration or moisture. On the other hand adhesive residues on the edges or overflowing adhesives between two assembled parts are a real no-go. The dispensing task depends on a defined form of the loudspeaker. Specific contours have to be respected and speed has to be varied. Curves in the dosing bead are critical areas: They are performed at smaller speed to avoid material accumulation or overlapping of the two bead endings. Also fluid  dripping or stringing at the end of each single dosing task has to be prevented. Total uniform application is essential.



Requirements in a dosing system for this branch are primarily: A most precise bead dosing and an absolute repeatability in fast processes!  That's why loudspeaker manufacturers depend on competent partners with whom they can ensure the unique quality of their products at every stage. Only proper bonding provides perfect hearing and permanent audio enjoyment. preeflow products are integrated in dosing applications like this worldwide. The unique quality – Made in Germany – turns them to indispensable components in these related challenging areas.



State-of-the-art dosing technology for convincing results



Precision volume dosing instruments such as eco-PEN and eco-DUO offer stable dosing. There are various areas in a loudspeaker to be glued and preeflow devices can perform them all perfectly: Bonding of coils, magnet system, membrane damper adhesives,  wire fixation and contact protection.  The preeflow  series replaces products of other manufacturers in a lot of applications because they were not able to withstand the high demands of the market.  Next to UV-curing adhesives also two-component adhesives and every other kind of adhesives that shows a viscosity from watery to pasty are processed. Smallest adhesive quantities starting from 0.001 ml can be achieved and this with a repeatability higher than 99%.



The complete preeflow  range uses  the  established ViscoTec endless-piston principle which makes it possible to achieve a purely volumetric, pulsation-free dosing process. The dosing behavior can be proportionally driven straightaway and therefore it’s very easy and fast to apply exactly and reliably one or two component adhesives. The performance characteristics remain the same whilst processing at the same time fluids with different viscosities for application with a big difference in the mixing ratio.



A stable dosing is ensured thanks to the precision volume dosing equipments such as the eco-PEN and the eco-DUO. preeflow products present ideal properties to match industry requirements and to even exceed them. From small smartphone loudspeakers to huge high-end boxes the dispensers have already enforced themselves in various loudspeaker applications – also in comparison with the competition. Please let us convince you!



Please find further information on the preeflow website: www.preeflow.com

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Micro-Dosing in perfection!



preeflow® is a brand name powered by ViscoTec Pumpen - u. Dosiertechnik GmbH. ViscoTec primarily deals in systems required for conveying, dosing, applying, filling and emptying medium to high-viscosity fluids. The headquarter of the technological market leader is in Töging (upper Bavaria, near Munich). In addition, ViscoTec has subsidiaries in the USA, in China and in Singapore and employs about 120 people worldwide. preeflow® ensures precise, purely volumetric dosing of liquids in smallest quantities and was established in 2008. preeflow® products are appreciated worldwide, last but not least because of their unique quality – Made in Germany. The standardized products are available  through  an international distribution network. The various fields of application include, among others, optic photonics, medical technology, biochemistry, LCD/LED, photovoltaics, laboratories, SMD/SMT, electronic components and semiconductor manufacturing.



Press Contact:

Elisabeth Lenz, Head of Marketing

ViscoTec Pumpen- u. Dosiertechnik GmbH

Amperstraße 13 | 84513 Töging a. Inn | Germany

Tel.: +49 8631 9274-447

elisabeth.lenz@viscotec.de · www.viscotec.de



Thomas Diringer, Manager Business Unit Components Devices

ViscoTec Pumpen- u. Dosiertechnik GmbH

Amperstraße 13 | 84513 Töging a. Inn | Germany

Tel.: +49 8631 9274-441

thomas.diringer@viscotec.de · www.preeflow.com

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