RAMPF Dosiertechnik introduces dispensing system for small volumes
Just about the size of a coarse grain of sand - two cubic millimetres – that is the smallest shot-volume which the new minimum quantity piston dispensing system (M-KDS) from RAMPF Dosiertechnik delivers. The maximum dispensing rate is 20 mm³/sec.
The M-KDS is ideal for applying minimal amounts of highly filled materials, as often arises in the electronics industry.
The modular and compact construction also makes the M-KDS suitable for integration into production lines.
Products always have to offer more and more functions spanning several industries in the highest precision and on the smallest installation space. The result is micro-components with complex geometry and short production times. Companies such as RAMPF Dosiertechnik, which provide reliable means of applying sealing foams, sealing compounds or adhesives, are required to offer new technologies for miniature products. And so it was that the specialists from RAMPF Dosiertechnik received the respective order about a year ago. The material, a two-component, electrically conducting adhesive, was to be applied in the smallest of quantities in the shortest possible time onto components under tension. In detail it concerned developing a system which dynamically mixes filled materials, dispenses extremely close to the mixing system, in order to avoid wastage and excessive pressures. In addition, the design of the system should make a multiple layout possible with the smallest possible clearance. The particular challenge thereby: to develop non-sensitive dispensing pumps for mineral or metallic fillers.
In the meantime, the new minimum quantity piston dispensing system is ready to go into production. The heart of the matter is the piston dispensing system, which dispenses each component with the highest precision directly into the mixing chamber. The piston system is electro-hydraulically driven, a linear drive concept which makes piston systems with small construction volumes possible and hence an extremely compact arrangement of the components. Spool valves control the flow of material displacement-free from the supply container into the mixing chamber. Materials in cartridges starting from 30 cm³ or in pressure vessels can be processed. A further novelty: No bleeding is necessary after the cartridge is changed! This concept permits processing of the most diverse of materials with a broad spectrum of viscosities - both one and two-component systems.
The decisive advantage of the M-KDS is that the small quantities of material are intensively mixed by the dynamic procedure. The material is applied quickly and precisely. The shortest possible dispensing time is about 300 milliseconds. Thanks to the volumetric dispensing of the piston dispensing system, the user can rely on a consistent dispensing result which is independent of viscosity. Production breakdowns do not represent a problem, because the system can be rinsed automatically with the master component or a cleaner. Pot lives of a few minutes are not an obstacle and permit optimized processes.
The minimum quantity piston dispensing system M-KDS is the successor of the first minimum quantity dispensing system M-DS from RAMPF. Thanks to the new technology, the M-KDS makes the casting of even smaller quantities possible. The specialists at RAMPF are also able to cater better to the properties of the material - instead of viscosities of just 50.000 mPa*s, viscosities up to 200.000 mPa*s can be processed. The modular and compact structure is equally suitable for integration into production lines. The premiere of the M-KDS was celebrated at the Productronica 2007, where it was shown to the world for the first time.
RAMPF- Technical Information:
The performance characteristics of the M-KDS at a glance:
- Dispensing output range 2 – 20 mm³/s (depending upon material)
- Smallest shot-volume: approx. 1 mm³ with a mixing ratio of 100:30
- Largest shot-volume: approx. 250 mm³
- Shortest dispensing time: approx. 300 ms
- Viscosities of components: 20 mPa*s – 200.000 mPa*s
- Pot lives: from approx. 5 min
- Range of mixing ratios: 100:100 to 100:5
- Optimal material preparation using a dynamic mixing system
- Extensive process monitoring options
Press release M-KDS