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Contact: +44 (0)114 2446071

Success through innovation

Product:

MV Miniaturised Spray Valve

Application:

The application of aqueous dispersion adhesive (PVA) to board or paper for cigarette packing (pack or carton).

Overview:

Designed to apply adhesive packaging. The Kaymich MV Miniaturised Spray Valve applies adhesive under pressure, atomising the adhesive on application which effectively removes up to 25% of the water content from the glue, making the adhesive applied very tacky to enable a fast bond.

The MV series Miniaturised Spray Valve retains many of the features of the original SG valve but offers a higher operating speed, greater versatility and cleaner running. Smaller by design, the MV valve is capable of cycling at upto 4,000 cycles per minute..

Key Features

Atomised adhesive provides quicker bond compared with wet applications such as pen, jet or wheel, improving pack quality and reducing rejects..

Developments to the Miniature Spray Valve‘s spray air enable the valve to react more quickly and produce a finer application. Possible to achieve lines of less than 3mm wide..

Self-cleaning, with spray air actuating before adhesive is applied and continuing after the adhesive line is closed, cleaning the face of the nozzle on every cycle, minimising downtime for cleaning.

Ratchet style adjuster for easy adjustmentof adhesive flow, at the rear of the applicator.

Application width proportional to distance of valve nozzle from substrate.

Optional spray beam mounting.

Optional folding rails

Kaymich spray valve on packerMV Miniaturised Spray ValveMV Spray Valve in tests.

FAQs

How does the MV series valve, reduce the overspray?
The uniform flow of air inside the air cap provides a consistent spray atomization at the end of the nozzle. This gives a more consistent adhesive droplet size, therefore minimizing any very small particles that can be carried by air currents.

How does the MV2A6Q development improve upon this?
By providing greater control over the spray air and adhesive air, enabling finer application, reduced application and less overspray. The full extent of these improvements are still being refined and proven.

How can the MV valve work in any orientation?
The controlled air flow gives excellent transfer of adhesive from the nozzle to the substrate. This allows the valve to work in any orientation and still give good operation.

What is the maximum operating speed?
Currently under development but nominally 4,000 cycles per minute or 800 dots per minute.

Is the application relative to machine speed?
Yes, the Venturi pressure drop principle is created by the cigarette paper and air passing over the end of the nozzle. It is therefore self-regulating.

What types of glue can be used?
Synthetic resin emulsion – PVA or EVA. Various adhesives with viscosity between 120 – 1200cps can be used, but the optimum adhesives have a viscosity of around 550cps..

How often and how easy are they to clean?
They only require that the air cap is wiped with a damp cloth at the end of an 8 hour shift..

How are the MV valves adjusted?
They use a ratchet mechanism that requires no tools to adjust. It also makes setting more easily defined, by closing the ratchet fully, then turning it out by a specified number of clicks. This makes noting the correct setting easy, e.g. 8 clicks open.

Notes

  • MV Miniaturised Valve: Up to 4,000 cycles per minute (typically 800 dots per minute).
  • Horizontal or vertically downward application.
  • Adhesive range 150 – 1200 centipoise, solids content 45% - 55%.

Technical Specification

Suitable for fitment to a wide range of cigarette packing machines, cartoners and case packer. For more information please contact Kaymich.

Services Required:
Dry, filtered, non lubricated compressed air, 60 to 100psi/4 to 7 bar. No lubrication required.
Electrical voltage – 24 Vdc
Spray air:= 0.0002 litres/ms.
Electrical power: 8 watts.

Adhesive Recommendations:
Whilst our products are designed to work with a wide range of adhesives performance will optimised by selection of the most suitable grade to match your process parameters. Please contact us if you require any assistance in identifying a solution for your requirements.

Type – End user must supply an adhesive tank to contain and supply adhesive (also available from Kaymich upon request). Synthetic resin emulsion.
Viscosity range – 150 to 1200 centipoise.
Solids content – 45% to 55%.
Supply pressure – 20 to 60 psi/1.5 to 4 bar.
Supply condition –Filtered, typical mesh 760μm (0.03 inch).
For adhesive grade recommendations please contact your regular supplier.

 

Performance characteristics:
Type – Valve reaction time – 6 ms open, 6 ms closed.
Cleaning duration – 35 to 50 ms.
Frequency of operation – up to 4,000 cycles per minute maximum.
Performance– Typically 800 dots/min.