Application: Siliconise the inside of syringes evenly and economically
What this application is about
The right solution starts with the entire process rather than an individual gun. Spray pattern, nozzle design, material pressure, delivery, component movement and cleaning must be considered together to keep the application stable and repeatable.
Purpose and benefits of the coating
The application mainly concerns glass and plastic syringes as well as comparable cylindrical medical components. 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.
What matters with the application
Even small fluctuations in material pressure, viscosity, distance or movement control can change the coating visibly or functionally. Typical requirements include:
- very small application quantities
- even distribution over length and circumference
- precise positioning of a diving or extension nozzle
- Avoiding drops, particles and overdose
- stable switching times at high cycle rates
- Customer-side validation of process and product function
uniform sliding effect with a very small application quantity
During siliconeisation, a very small amount of suitable silicone oil is applied to the inner wall of the syringe cylinder. The layer reduces friction between piston plugs and cylinders, thus affecting starting and sliding forces. An uneven distribution can lead to fluctuating piston run.
Particles, material compatibility and pharmaceutical requirements must be evaluated in the validated customer process. Krautzberger provides the finely dosed application technology.
- very small and reproducible silicone quantity
- even inner wall distribution
- clean and particle-free material handling
- precise cycle timing at high production volumes
- easy cleaning and controlled process release
Spraying technology and material supply from Krautzberger
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 Mikro-automatic spray guns, slim nozzle extensions, very finely adjustable material pressure vessels or supply systems and precise pressure regulators. The technically and economically suitable combination is selected for the specific medium, components and required production output.
Typical applications
The application is used in different industries and component groups. Typical examples are:
- pre-filled glass syringes
- Plastic syringes
- Cartridges and cylindrical dosing devices
- Development and pilot plants
- automated series lines
- Functional coating of similar medical cylinders
Process integration and automation
The nozzle is defined to be inserted into the syringe body and moved during the spray pulse or retreat. Application quantity, withdrawal speed and spray screen determine the distribution.
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.
Benefits for your production
- even and economical silicone distribution
- Reproducible piston conduction forces
- Low material consumption
- automatic dive and retreat movement
- precise dosing at high production volumes
- Application-related selection of material-managing components
Process design 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.
Application quantity and distribution must be validated through suitable measurement and functional tests. Krautzberger optimises the spray pulse, extension, position and supply in the sample process.
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.
Related products
All products
Find the right application solution together
Are you looking for a micro spray gun, an internal-coating nozzle or a finely adjustable material supply for siliconising syringes? Krautzberger supports you in selecting and designing the application equipment.
Contact Krautzberger to discuss your medium, component, production volume and desired result. Together, we assess how the process can be implemented safely and economically.
Industries for this application
Silicone oil should facilitate the piston movement of a syringe without leaving drops or overdosed areas in the cylinder. This medical production step depends on very small quantities and even distribution.
