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Adhesive systems for packing

Kaymich produce a range of applicators and associated equipment for use on cigarette packing machines.

Kaymich Spray Valves are specifically designed to spray aqueous based adhesives. Their unique design has eliminated the problems of poor response and dirty running. A self cleaning feature obtained by creating a vortex swirl at the nozzle end ensures clean, repeatable and accurate application. Actuation is by built-in air cylinder.

SG Spray Valves

The Kaymich SG Spray Valve Assemblies are designed to spray atomised aqueous dispersion adhesive onto paper or board substrates.

Adhesive is supplied to the adhesive chamber in the valve from a pressurised tank or pump. When the piston air solenoid opens, the valve needle is drawn open against the force of the spring allowing the adhesive to flow, this process takes 15 ms. At the same time as the adhesive is jetting out of the nozzle, spray air is supplied to the air cap via porting in the adhesive chamber. After entering the valve the air passes through a swirl ring which creates a vortex of air over the nozzle within the air cap.This vortex then atomises the adhesive as it leaves the nozzle in a conical formation. The closing process is initiated by the control system of the parent machine and takes 15 mS.

The MV series miniaturized spray valve was developed in response to the industry requirements for greater operating speeds, whilst retaining many of the features that ensured the success of the original Kaymich SG spray valve.

 Features

• Flexible diaphragm eliminates sliding seals.
• Response - 1,500 cycles per minute.
• Variable spot or width application.
• Ratchet Style Adjuster.

Benefits

• Self cleaning and reliable.
• Accurate application.
• Efficient use of adhesive - atomised on application producing a fast, efficient bond.

Technical Specification

• Product: SG Spray Valve

Services Required:

• Dry, filtered, non-lubricated compressed air, 60 to 100 psi/4 to 7 bar.
• Air Consumption: Piston = 0.001 litres/cycle: Spray Air = 0.002 litres/ms.
• Electrical voltage: 12 or 24 Vdc.
• Electrical power: 2 x 2 watts.

Adhesive Recommendations:

• Type - Synthetic resin emulsion.
• Viscosity - 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 normal supplier.

Performance Characteristics:

• Valve reaction - 15 mS open, 15 mS closed.
• Cleaning duration - 35 to 50 mS.
• Frequency of application - up to 1,500 cycles/minute maximum. (High response units on request).     

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MV Miniaturised Spray Valves

The MV series miniaturized spray valve was developed in response to the industry requirements for greater operating speeds, whilst retaining many of the features that ensured the success of the original Kaymich SG spray valve.

The MV series miniaturised spray valve is designed to spray atomised aqueous dispersion adhesive onto paper or board substrates.

Features

• Multiple port facility for adhesive and air feed options.
• Flexible diaphragm eliminates sliding seals.
• Response - 4,000 cycles per minute.
• Variable spot or width application.
• Ratchet Style Adjuster.
• LED indicators confirm operation.
• Low friction coating to spray cap and components improves ease of cleaning.

Benefits

•  Increased productivity - operates reliably up to 4,000 cycles per minute.
•  Improved response time.
•  Cleaner operation - eliminates virtually all traces of over-spray, reducing machine contamination.
•  Greater versatility of application including significantly narrower spray bandwidth.
•  Sealed housing to single plug eliminates ingress of dust and moisture, improving reliability.
•  Single air feed, single electrical connector.
•  Easier to operate - no requirements for tools.

Services Required:

• Dry, filtered, non-lubricated compressed air 4 to 7 bar / 60 to 100 psi.
• Air consumption: Piston = 0.0005 litres/cycle.
• Spray air = 0.002 litres/ms.
• Electrical voltage: 24 VDC.
• Electrical power: 8 watts.

Adhesive Recommendations:

• Type: PVA or VAE emulsion.
• Viscosity: 150 to 1200 centipoise.
• Solids content: 45% to 55%.
• Supply pressure: 1.5 to 4 bar / 20 to 60 psi.

Performance Characteristics:

• Valve reaction: 6 ms. open 6 ms. closed.
• Cleaning duration: 35 to 50 ms.
• Normal operation 850 cycles per minute based upon nominal 35 ms application time and 35 ms. cleaning.
• 4000 cycles per minute maximum capability.

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Jetting Valve

The JV3A Jetting Valve is designed specifically to complement the range of Kaymich spray valves for packaging applications.

Industry feed-back regarding the shortcomings of previous jetting valves, specifically the inability to operate reliably with a wide range of adhesives, limited operating speed, difficult to install with complex electronics and operating problems on re-start, provided the outline

 Features

• The JV3A is designed to enable greater productivity due to increased speed of operation and problem free re-start following machine stoppage.
• Self-cleaning feature and bleed-through option reduce the need for removing the valve for cleaning following short and extended machine stoppage. 
• Easy access to nozzle and plungers eliminates the need for valve strip-down for replacement of nozzles and plungers.
• Ratchet style adjuster for variable application, single dot to continuous stream.
• Simplified controls result in easy installation.

Benefits

• Increased productivity
• Improved response time
• Reduced downtime for cleaning
• Greater versatility of application
• Easier to install

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