You will know that you have too much vacuum when the material starts bubbling in the syringe. If you use too much vacuum the material may be sucked back into the dispenser. You shouldn't have to increase it any further. Then, gradually increase the vacuum pressure until the dripping stops. To set it properly start with little vacuum pressure so that the material is dripping from the tip. This feature is ideal when using low viscosity materials and greatly reduces any dripping waste and potential messes that might incur. Always be sure to place your dispensing barrel tip facing down into the barrel stand when not in use, and position your dispensing unit at a higher level than your working area.Īs an added feature some units come equipped with a "vacuum pull back" option. Having an inline filter on the airline from the barrel is a useful addition and can protect the dispenser from fluid damage. Sometimes accidental back flow into the controller can occur which may cause major damage. The piston will help keep the pressure more consistent. When dispensing medium to low viscosity fluids and liquids the use of a polyethylene piston will improve on barrel pressure and decrease dripping. Choosing the proper tip size, air pressure, and shot time can help achieve the the perfect bead shot size. If you can not supply your unit with clean air you should use a regulator with a 5 micron filter and a water trap.ĭispensing controls are inexpensive but effective way to improve the dispensing process. Additionally, this can effect the adhesion and curing properties of the materials you are using and lead to contamination. Moisture in the air lines can do damage to the internal mechanics of your dispenser. Make sure your dispensing unit is supplied with dry clean air. You can simply engage the safety clip on the hose before making any necessary changeovers. ![]() This will prevent any accidental hitting the foot pedal or finger trigger activation during this process. When changing a tip on a dispenser always detach the barrel adapter hose from the controller with the simple quick disconnect fitting. This will save time and improve your accuracy because you will not be constantly resetting the pressure. Your first instinct is to increase the pressure, but the material may be curing in the tip and reducing the flow. Try using a tip with a higher material capacity and an inert material like a smooth flow poly tapered tip.Īfter some use, you may notice that the deposits are starting to become smaller and smaller. Sometimes tip clogging can occur with materials that dry very quickly, like solvent-based varnishes or thinner adhesive material. Begin with the largest possible tip gauge for the shot size and work your way down from there. You can always adjust shot time and pressure to control the dispense amount. ![]() tip can save on material cost, and provide more accurate results. In this article I've outlined just a few quick tips and key points to help you get started.įinding the right size gauge and I.D. It can be especially difficult when using thinner, low viscosity materials. What can be little difficult about using a paste dispenser is getting started and setting up for your application process. Two of the many great things about using a paste dispenser are the ease of use and quick changeover. Pneumatic paste dispensers (applicators) can increase production and improve cost with consistent results.
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