Dosing pumps for sealing compounds
Reliable, non-damaging solutions, despite abrasive fillers
Polyurethane sealing compounds fulfil a variety of purposes in the electronics industry, such as protecting plastic electrical housings, control units, industrial lights and sensors from dust, moisture and unwanted attention. To ensure that they function effectively, the manufacturers of these systems use a variety of fillers which extend the range of properties of the plastic materials. However, these additives present companies using the sealing compounds with the challenge of finding a dosing pump that can handle the compounds without problems.
For dosing very small quantities, gear pumps can be mounted next to the mixing system. The pumping volume is 50 mm 3 per revolution.
Practical experience shows that piston pumps give the best results in terms of service life, accuracy and precision, but gear pumps make a good alternative. They are more cost-effective than both piston pumps and screw pumps and can pump continuously. Screw pumps are also suitable for continuous dosing of filled materials. There are no good or bad pumps in this respect. The decisive factors are the requirements placed on the system. If more than one type of pump is available, personal preferences and logistical considerations will often play a role in the decision-making process.
Dosing Pumps for sealing compounds