Field test with abrasive copper solder paste
Dispenser withstands nine months of constant load in three shift system
(PresseBox) - Solder pastes are used for soldering metals and alloys such as copper, bronze, zinc or silver. A superficial connection is produced in the form of a melt, which solidifies after cooling. In many cases, solder pastes are used in the electronics sector of the automotive industry.
Due to abrasive particles in the medium, solder pastes place high demands on the dosing components used. Especially in shifts, the industry is pushing for low-wear solutions and long service life. ViscoTec?s eccentric screw pump has established itself in this particular market sector for a number of reasons: a uniform volume flow in the dosing pump prevents sedimentation of the filling material, concentrations of filler are avoided due to low pressures being exerted and a pulsation-free feed and also the fact that the rotor-stator combination of stainless steel and an elastomer ensures minimum shearing in the handling of the fluid.
ViscoTec dispensers are often integrated into fully automated systems as large scale paste application systems. This is just the case at one of the leading tier-one automotive supplier in Germany. Here, a glycol-based, highly filled copper solder paste is in operation. Due to the high degree of filling, the density is approximately 4,0 g/cm³. The application system is operated by 4 parallel dosing station units running in a three shift fixed cycle of 24 hours a day, 7 days a week.
Within the scope of a changeover to the largest of the RD-series of dispensers, the 3RD12, the dosing pump was tested under constant load over nine months - with surprising results: the stator, consisting of a mechanically stable elastomer, showed a deviation of only 0,04 mm from the reference value. No wear marks could be measured on the stainless steel rotor. A highly satisfactory result in view of the extreme conditions of this real life situation. This was made possible by the number of year?s experience which ViscoTec has accumulated in the technical design of abrasive applications. In this particular case, the dispenser is operated at only 30% of the maximum revolution speed in order to minimize the flow velocities of the medium and therefore also reduce the impact force of the particles within. In addition to this know-how, the close co-operation with the material manufacturers and the constant optimization of the elastomers used, are the foundation for the success in this challenging field.
ViscoTec - Perfectly dosed!
ViscoTec primarily deals in systems required for conveying, dosing, applying, filling and emptying medium to high-viscosity media. The headquarters of the technological market leader is in Töging (Upper Bavaria, in the district of Altötting). In addition, ViscoTec has subsidiaries in the USA, in China and in Singapore and employs about 120 people worldwide. Many traders around the world extend this international distribution network. In addition to sophisticated solutions even in the most complicated tasks, ViscoTec offers all components for a complete application from one source: from procurement, through to product preparation to dosage. This guarantees a successful interaction of all components. All fluids with a viscosity of up to 7.000.000 mPas can be conveyed and dosed almost pulsation-free and with extremely low pressure. For each application there is comprehensive consultation - and where necessary in collaboration with the customer - extensive tests are carried out. ViscoTec dosing pumps and dosing systems are optimally adjusted to the respective application: in food applications, in the automotive, aerospace, medical, pharmaceutical and in many other industries.
ViscoTec - Perfectly dosed!
ViscoTec primarily deals in systems required for conveying, dosing, applying, filling and emptying medium to high-viscosity media. The headquarters of the technological market leader is in Töging (Upper Bavaria, in the district of Altötting). In addition, ViscoTec has subsidiaries in the USA, in China and in Singapore and employs about 120 people worldwide. Many traders around the world extend this international distribution network. In addition to sophisticated solutions even in the most complicated tasks, ViscoTec offers all components for a complete application from one source: from procurement, through to product preparation to dosage. This guarantees a successful interaction of all components. All fluids with a viscosity of up to 7.000.000 mPas can be conveyed and dosed almost pulsation-free and with extremely low pressure. For each application there is comprehensive consultation - and where necessary in collaboration with the customer - extensive tests are carried out. ViscoTec dosing pumps and dosing systems are optimally adjusted to the respective application: in food applications, in the automotive, aerospace, medical, pharmaceutical and in many other industries.
Datum: 30.11.2016 - 14:47 Uhr
Sprache: Deutsch
News-ID 510041
Anzahl Zeichen: 3816
contact information:
Town:
Töging a. Inn
Kategorie:
Tradeshows
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"Field test with abrasive copper solder paste"
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