Showcased on the Henkel stand at Southern 2015 was the new LOCTITE® Jet Valve system for high speed, bubble-free jet dispensing of adhesives. This, claims the firm, is a proven method of applying small, accurate beads or drops of adhesive, at high speed in automated production. Two key benefits claimed by Henkel system are reliability and easy serviceability. The LOCTITE Jet Valve dispenser, it’s claimed, contains fewer wearing parts than similar products on the market. It has no fluid seals to be cleaned or replaced so maintenance is simple and quick. Even the valve is field-repairable so there is no need for the system to be taken out of production and returned to the manufacturer.
Many of the internal components are also made from highly durable materials such tungsten carbide or ceramics contributing to the long service life of this product. Thanks to the very small mass of the diaphragm that is a feature of the LOCTITE Jet Valve, the system is capable of very fast cycle rates. It applies up to 300 drops per second and those drops can be as small as 0.3mm in diameter. The diaphragm itself is made from an elastomer that provides the greatest chemical compatibility for a wide range of applications. As this is a non-contact technology there is no risk of substrate damage in applications such as surface mount electronic assemblies or sensitive medical devices. The system is also able to deliver its uniform pattern of discrete beads regardless of the surface features or shape of the work piece.
Typically the LOCTITE Jet Valve system will be used for dispensing light-cured adhesives in electronic and medical device manufacture but it can also dispense other single-part adhesives or even other liquids. It has an integral heater to raise the temperature of the adhesive up to a maximum of 75°C to achieve optimum viscosity and therefore perfect dispense characteristics. The overall compactness of the system’s design means that minimal space is required to integrate into a production line. Three different nozzle sizes may be specified for the LOCTITE® Jet Valve.
More information at www.loctite.co.uk