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filling machine
filling machine

Wonder how a filling machine works?

Meccanica: macchine, utensili, materiali > Do you know what a filling machine system is? And how it works? Any ideas about the basic concept leading to the packaging of your favorite carbonated drinks, milk, wine, etc.?

Filler machines are an essential element for the manufacturing industry. They promote product quality and efficiency during phases of production. Food and beverage companies tend to adopt these for packaging their products. Use of these machines for packaging may be extended to other kinds of products and industries as well.

Important in any case, different fillers are needed for different kinds of products. All products have specific filling and packaging needs; like volume weights or types of packaging itself (cartons, plastic bags or bottles).

The fillers are arranged according to the degree of automation and materials used. The three categorizes are automatic, semi-automatic and fully automatic filling machines. These may also include liquid fillers, gas fillers, paste fillers and powder fillers.

When we focus on working principles, numerous types of fillers are available on the market. We are primarily interested in the working principles at the base of filling liquids, gases and adhesives.

Gas Fillers:

A straightforward method is used with “gas fillers”. It uses a booster pump for creating pressure differences which are necessary for the filling. This gas booster is very similar to a gas compressor. Examples of these filling materials are carbon dioxide, coal gas, and natural gas, etc.

Paste Fillers:

In paste fillers, a volumetric method is used for measuring and controlling the filling quantity of the pastes. This method is considered very efficient and easy to maintain. It is particularly handy for highly viscous products.

This machine functions due to a self-priming cylinder which moves the pistons. The diameter of the piston together with the stroke length determine the filling volume. The volumetric fill of this liquid filler is considered particularly accurate thanks to the constant volume of the cylinder on the piston.

Liquid Fillers:

Liquid fillers are divided into ordinary, pressure and vacuum filling machines on the basis of their working principles. Gravity controls ordinary liquid fillers where liquids fill their specific bottles according to their weight. Nevertheless, special requirements must be met to maintain the viscosity and gas bearing of the fluids. Extraordinary examples of such are milk bottles and wine bottles.

In vacuum fillers, atmospheric pressure has to be greater than the pressure of the bottles. Liquids such as syrups, oils and wines have high viscosity and require this very effective kind of filling with its very simple structure.

Pressure liquid fillers require greater pressure than atmospheric pressure to be functional. This type of filling is further divided: “equal air pressure filling” and “high-pressure filling”. In “equal air pressure filling,” the pressure of the liquid reservoir receives an amount equal to that of the bottle. Thus the liquid flows into the bottles because of their weight. Whereas, high-pressure filling, works because of the pressure difference between the liquid reservoir and the bottles.