By Vacman In Vacman's Notes
To obtain the reasonably high vacuum level required for the resin infusion process it is normal to use a single stage oil flooded, rotary vane vacuum pump with an integral
By Vacman In Vacman's Notes
We often supply our resin traps and controls to customers who already have a vacuum pump, or who wish to reduce the overall equipment cost by buying a second hand
By Vacman In Vacman's Notes
When we started developing this website, we considered including a flow chart that would start with a set of needs and end up with a model recommendation, but it all
By Vacman In Vacman's Notes
While there are dry running vacuum pumps that do not require any oil, composites industry vacuum pumps are typically of the oil flooded rotary vane type. The reason the composites
By Vacman In Vacman's Notes
A vapour is the gaseous state of a substance which is liquid or solid under ambient conditions. Vapours are often the “unseen enemy” when using the resin infusion process in
By Vacman In Vacman's Notes
The ideal outcome when using the resin infusion process is for the resin to completely fill the laminate, but not escape from the vacuum bag. In practice, this ideal can
By Vacman In Vacman's Notes
We introduce this note with a word of caution! While the following describes a method for transferring a batch of resin from anevacuated vessel into a laminate to be infused without
By Vacman In Vacman's Notes
When using the resin infusion process to make a composite part, the combination of a peel ply resin break (although maybe it should be called a resin brake?) and a
By Vacman In Vacman's Notes
In Vacman’s experience, resin is best fed to a part to be infused from the bottom of the resin feed vessel via a disposable valve, as illustrated below. Depending on the resin
By Vacman In Vacman's Notes
It is often helpful to make a transition from one tubing size to another, or to join two similar size pieces into a longer length. If two tubing sizes are
By Vacman In Vacman's Notes
There are various ways of providing a vacuum or resin feed penetration through a vacuum bag. One solution is to run a tube in under the perimeter of the bag
By Vacman In Vacman's Notes
Or a little bit of theory that’s useful to know, but don’t worry about the equation appearing below – no maths required! Please don’t be concerned about the mathematical appearance
By Vacman In Vacman's Notes
More and more laminators using the resin infusion process are including an absolute pressure gauge in their tool kit. Although often called a precision vacuum gauge, an absolute gauge actually
By Vacman In Vacman's Notes
In the field of composites, resin infusion is a process where the voids in an evacuated stack of porous material are filled with a liquid resin. When the resin solidifies,
By Vacman In Vacman's Notes
Benefits of an EVA valve in the vacuum applications in composites While the vacuum processes in composites usually appear to be dry, the reality is that they are always “wet”
