In the world of packaging and filling, precise dosing is important to ensure product quality and reliability. CDA offers a complete range of filling machines, both semi-automatic and automatic, specially designed for dosing various types of product, whether liquid, viscous or pasty.
These technologies include volumetric, flowmetric and weight filling methods, all of which guarantee optimum precision.
In this article, we’ll explore the different filling methods and discuss the advantages and features of each.
- Volumetric filling
Volumetric filling relies on the use of pumps which perform two essential functions: drawing a volume of product from a tank, followed by its precise transfer into the target container. Several pump types are available, including peristaltic, piston, rotary piston, gear and lobe pumps. This method offers advantages such as speed of execution, versatility for different types of product, and minimization of product losses. It is also suitable for a wide range of containers, from small bottles to the largest canisters.
- Peristaltic pump
This method relies on the compression of a flexible hose by rotating rollers, thus defining a volume transferred into the container. Simplicity of product changeover (simply replace the hose) and ease of cleaning are notable advantages. The peristaltic pump is recommended for dosing fluid products in quantities from 1 ml to 250 ml, with an accuracy of +/- 0.5% of the dosed volume.
- Piston pump
Thanks to a suction mechanism, the product is delivered to the piston dosing chamber from a reservoir, then pushed towards the valve and dosing head once the preset quantity has been reached. This method is suitable for viscous products such as mustard, ketchup and cosmetic creams. Piston pumps cover a dosing range from 1 to 1.3 liters, with an accuracy of 0.5% to 1% of the dosed volume, depending on product and quantity.
- Rotary piston pump
Liquid is drawn into the dosing chamber until a specific orifice indicates the stop and the desired quantity, then the piston is rotated to release the liquid. This pump is used in a variety of sectors, offering hygienic advantages and simplified maintenance. However, it may have limitations in terms of suction.
- Gear pump
This pump uses two gears to convey the product to the outlet. It is ideal for viscous products such as honey, oil and maple syrup, offering accuracy of +/- 0.5% for containers weighing from 10 grams to 2 kilograms.
- Weight filling
Weight filling relies on the measurement of product weight during filling, ensuring unrivalled accuracy, ideal for expensive products such as pharmaceuticals. However, it is slower and requires regular calibration.
- Flowmeter filling
Flowmeter filling guarantees a constant weight or volume using a flowmeter placed on the filling nozzle. This offers high precision, a hygienic approach and the ability to dose variable volumes.
In conclusion, CDA offers a wide range of filling machines equipped with various dosing systems to meet customers’ specific needs in terms of precision, speed, flexibility and cleanability. The CDA team is ready to work with you to find the best solution for your production, and complementary machines, such as screwers, labelers and monoblocs, are also available.