Selections dispensing systems

MUSASHI has a wide range of metering valves and metering systems. MUSASHI thus offers solutions for a wide range of applications. The selection of the suitable dosing system is based on a variety of criteria
  • The material to be dispensed
  • The geometry or quantity to be dispensed
  • The desired degree of automation

Dispensing system selection according to material

The properties of the materials are summarised in the MaterialDataSheet (MDS) (not to be confused with the SDS Safety DataSheet, which describes the handling of a specific material/hazardous substance). handling of a specific material/hazardous substance).

The relevant criteria are

  • Viscosity
  • Size of filler particles (if present) or the curing mechanism (especially for adhesives).
Viscosity is a measure of the viscosity of a fluid. The higher the value, the "tougher" the material. In practice, the dynamic viscosity is measured in In practice, the thousandth part of the SI unit mPa-s (millipascal-second) is also used for the dynamic viscosity for media of low viscosity, in addition to the Pa-s (pascal-second). In the CGS system, dynamic viscosity is measured in poise (P), where 1 Pa-s = 10 poise.

1.000 mPa·s = 1 Pa·s = 10 Poise = 1.000 cP (or CPS)

Water has a viscosity of 1 mPa-s at 20°C. The dynamic viscosity of most liquids decreases with increasing temperature. If the viscosity of a material is not known, a comparison with materials known from everyday life often helps. The diagram opposite shows the viscosity ranges for different materials

a) Technical materials (left)
b) Materials from everyday life (right)

Selection Committee-Viscosity
Thin-bodied (low viscosity) materials can be jetted. For viscous (high viscosity) pastes, mechanical dispensers such as screw or auger dispensing valves are more suitable. screw or auger dosing valves. Pressure-time dispensing systems, on the other hand, have the greatest flexibility and can dispense materials with a viscosity from 1 to 1,000,000 mPa*s.

Some materials contain fillers, e.g. solder paste with solder balls or heat conductive pastes with ceramic particles. These also influence the dispensing system.

When dispensing adhesives, the curing mechanism is another important criterion. For the common 1K adhesives these are:
  • Curing with light
  • Stimulation with light
  • Temperature increase
  • Exclusion of oxygen and contact with metal (anearob)
  • Admission of humidity
For example, for anaerobic adhesives, dispensing systems must be selected in which the material-carrying parts are not made of metal: For example, pressure-time dispensers with cartridges and plastic needles, jet valves where the material-carrying parts are made of peak or ceramic or peristaltic pumps.

2C adhesives consist of separate components that react to form polymers after mixing. Usually one component contains resin monomers (or binders), while the other contains hardeners. 2C adhesives are processed as PreMix or with special dispensing and mixing systems.

Dispensing system selection according to dispensing geometry and the quantity to be dispensed

In addition to the material to be dispensed, the dispensing geometry is also relevant. This concerns the shape.

Geometry selection committee

The same applies to the absolute dispensing quantity. The respective quantity to be dispensed can be derived from the geometry of the parts or weighed out on the basis of tests. The relationship between volume and weight also results from the density. For example, water has a density of 1mg/mm³ or 1g/cm³ or 1g/ml.

Selection committee Guideline values for delivery quantities
Guide values of the discharge quantities
Selection Creterium Caterpillar Sizes
Caterpillar sizes

Another clue can be the container size to be used:

  • Standard cartridges are usually available from 5-100 ml
  • Large cartridges are available from 100-400 ml
  • In addition, dispensing from the tank (from 1 l) or bucket/hobbock (from 20 l).

Dispensing system selection according to degree of automation

Another criterion for selecting the optimal dosing system is the degree of automation. On the one hand, this concerns the expected production quantities.
Selection criteria manual production
Manual production
Selection criteria semi-automated production
Semi-automated production
Selection criteria Inline production
It also concerns the positioning accuracy and dispensing quantity required for the dispensing process, which are determined via the handling, the dispensing system and the dispensing needle.

Manual positioning
Programmed positioning
Automated measurement and correction

Do you have any questions? We will be happy to advise you. Please send us your inquiry to

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