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must be sealed off. Simply clamp off this line by creasing the tube and attaching a #1605-A Flow Regulator to hold it in place. Allow for prohibiting resin from entering the vacuum Resin Trap One key piece of equipment that is important to understand is the #1500-A Resin Trap. A resin trap is an airtight container placed within the vacuum tubing circuit between the laminate and the pump to catch any excess resin before it can enter and destroy the vacuum pump. When set up properly, the vacuum tubing will flow out of the laminate and connect directly to the resin trap. A separate tube will then leave the resin trap and connect to the vacuum pump. During VIP, vacuum pressure is being used to draw resin into the laminate. In many cases, resin will flow completely through portions of the laminate while still filling dry spots in another. This is normal and is no cause for alarm except that resin will frequently enter the vacuum line while continuing to infuse resin. With a resin trap, all excess resin will be collected in the trap, while air is still allowed to flow back to the pump. If the part is large and significant resin flow into the vacuum line is expected, any number of resin traps may be placed in sequence. As soon as one is filled, the resin will overflow into the next one. Note: Before using a resin trap, wax the inside of the tank with mold release wax to ensure easy removal of the hardened resin. Step 4 Vacuum Pump Attach the pump Once all the components are in place, it is time to attach the vacuum pump itself. Because resin is infused through vacuum pressure, it is quite beneficial to have a stronger pump. In general, a stronger pump will help expedite infusion. Ensure proper vacuum Once attached, switch the vacuum on. As in any vacuum bagging application, leaks pose the biggest problem. Even the smallest leak can greatly hinder performance or even completely ruin a part. Because VIP offers unlimited time to seek out these leaks, considerable effort should be made to find them all. Even so, there are frequently small leaks that are seemingly impossible to discover. There are some tools that can greatly aid this process. One handy tool is a #1503-A Ultrasonic Leak Detector. This small handheld tool is designed to detect ultrasonic frequencies, while simultaneously screening out audible noise. Wearing the supplied headphones, leaks are easily heard, while an LED display indicates leak strength. Because audible noise is screened out, this detector can even be used in a noisy shop environment. For those on a tighter budget, a simple stethoscope can also be used to detect leaks. Though it won’t provide the precision that an ultrasonic detector uses, a #1504-A Stethoscope will amplify leaks and provide a helpful aid at a minimal cost. Pg. 9 of 14PDF Image | Vacuum Infusion
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