Aplicación: Colour eggs evenly in industrial production lines

In brief

When colouring eggs, a thin layer of colour is applied to the shell. A uniform appearance, low colour losses and gentle handling of the sensitive products are essential.

De qué se trata esta aplicación

Various wet-spray processes are suitable for industrial application. Depending on the medium, component geometry, batch size and quality requirements, application can take place with a manual paint spray gun, a coating gun, an automatic spray gun or within a painting and coating system.

What the coating must achieve in the process

The application mainly concerns egg shells in suitable food production processes. The required effect occurs only when coating material, substrate, layer thickness and subsequent drying or curing fit together. The spraying process must therefore be adapted to the concrete material system and the real production conditions.

Alongside surface quality, material consumption, cleaning effort, system availability and reliable repeatability also matter. A sound technical solution therefore combines controlled atomisation with a stable material supply that is easy to regulate.

Challenges in spray application

Even small fluctuations in material pressure, viscosity, distance or movement control can change the coating visibly or functionally. Typical requirements include:

uniform all-round coating of a curved surface
small, reproducible amount of colour
Avoiding drops, runs and colour nests
Synchronisation with transport and rotation of eggs
good cleanability and short colour change
Product-suitable material-leading components

Uniform colour with gentle product handling

In industrial egg dyeing, the shells must be evenly wetted without forming drops or dark accumulations. Eggs have natural differences in size, colour and surface structure; these variations influence the visible color effect.

The spray gun, product detection and conveying system are coordinated so that only eggs that are present are sprayed and the products are not moved by strong air pulses. The dyes and components in contact with the material must be approved for the intended food-production process.

uniform wetting around the entire surface
Low drop formation
Synchronisation with the conveyor system
gentle air and material quantities
quick cleaning and color change

Krautzberger application technology for this application

Krautzberger treats application and material supply as a connected system. Depending on the task, manual and automatic spray guns, suitable air and material nozzles, material pressure tanks, diaphragm pumps, pump and lifting stations, and material pressure regulators can be combined.

In automated processes, spray guns can be integrated into mounts, lifting devices, axes or robots. Material changeover valves and flushing equipment support applications with several colours or media. The specific selection depends on viscosity, solids content, application quantity, cycle time and component geometry.

For fine surface finishes, various XLINE nozzle combinations and spray patterns are available. With highly viscous, abrasive or sedimenting media, sufficiently large flow cross-sections, suitable material combinations, agitators and pressure-stable delivery become more important.

The focus is on finely atomizing automatic spray guns, small material pressure vessels, precise pressure regulators and in case of colour changes well flushable pipes or material change technology. The technically and economically suitable combination is selected for the specific medium, components and required production output.

Typical components and areas of application

The application is used in different industries and component groups. Typical examples are:

Easter eggs production
colour sorting or decoration
Mono- and multi-coloured coatings
Small batches and seasonal production
Automated transit systems
manual sampling and product development

From manual application to automated installation

The eggs are often turned during transport, so that the colour is distributed evenly. Spray rate, beam width and drying distance must match the line speed.

In addition, component feed, extraction or ventilation, cleaning, media change and accessibility for maintenance work must be taken into account during the system integration. This keeps the process stable not only in the pattern run, but also in everyday production.

Advantages of a coordinated spray solution

Uniform colour distribution
reduced colour consumption
fewer runs and soiling
fast adaptation to colors and batches
Reproducible series results
Integrable in seasonal and continuous lines

Application trials at the Krautzberger technical centre

Liquid media and coating materials with similar names can differ considerably in viscosity, solids content, solvent base, wetting and drying. A reliable choice of spray gun, nozzle and material supply should therefore be made using the original material and a representative component.

Original colour, shell temperature, rotation, transport speed and cleaning are considered. The food law suitability of paint and product-contacted components must be checked on the customer's side.

On this basis, the spray pattern, material quantity, pressure, distance, movement and cleaning sequence can be defined. The result is an application solution suited to the medium, the geometry and the intended production process.

Al centro de pruebas técnico

Matching solution for your process

Looking for a spray gun, an automatic spray gun or a complete material supply for this process? Krautzberger helps you select and design suitable spray technology, nozzle configurations, delivery and regulation.

Contact Krautzberger to discuss your medium, component, production volume and desired result. Together, we assess how the process can be implemented safely and economically.

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