How do I choose a vacuum pump?

When choosing a vacuum pump, first determine the level of vacuum /pressure required. Laboratory/Filtration Vacuum pumps are general and specific purpose pumps for applications in the laboratory or anywhere a low vacuum is needed. Most laboratory/filtration pumps have vacuum and pressure capabilities.

How many CFM do I need for resin?

Unless a large volume resin trap with an appropriately enlarged pump connection, applying much more than about 30 m3/h (18 cfm ) tends to be wasteful and may create considerable noise through the vacuum regulation valve (if one is fitted).

How much is a vacuum for infusion?

If you were just doing wet-lay vac bagging then fine, but for infusion you need very high vacuum. 150 or even 80mbar is not good enough.

How long does resin infusion take?

Many resins have a pot-life of about 30 minutes, though there are certainly some (such as our System 4500 Infusion Epoxy Resin or System 4600 High Temp Infusion Epoxy Resin ) that offer work times of up to 90 minutes.

How does vacuum infusion work?

The Vacuum Infusion Process (VIP) is a technique that uses vacuum pressure to drive resin into a laminate. Materials are laid dry into the mold and the vacuum is applied before resin is introduced. Vacuum bagging greatly improves the fiber-to- resin ratio, and results in a stronger and lighter product.

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Which type of vacuum pump is best?

Scroll pumps handle water vapor better than most types of pumps and make significantly less noise during operation. Because the scrolls are made of metal, even on chemical- or corrosion-resistant models, only samples with acids below 20% are recommended.

How big of a vacuum pump do I need?

The most practical way to decide what A/C refrigeration pump is needed is to take the square root of the tonnage you’re servicing. 16ton to 25ton (Typical Residential A/C System) would require a pump with a 4 to 5 CFM rating. 16ton to 25ton (Commercial Systems) would require a 6 to 8 CFM rating.

How strong should a vacuum pump be?

Rule of Thumb for Selecting the appropriate Vacuum Pump for your Acrylic Vacuum Chamber

Acrylic Chamber Volume (cubic feet) Recommended Vacuum Pump CFM
Less than 1 3.0 or less
1 to 2 3.0 to 5.0
2 to 4 5.0 to 7.0
4 or more 7.0 or more

Can you use a vacuum chamber for resin?

Pressure Systems ( pressure chambers and compressors) offer the optimal method for creating molds and resin castings that are truly bubble free. Vacuum Systems ( vacuum chambers and vacuum pumps that pull 29 inches of mercury) are used to remove the air from high viscosity materials like silicone rubber before pouring.

How much resin do I need for vacuum infusion?

a 40% resin content is the usual aim for infusion, as you said. To calculate that, you work out the rough surface area of your part in square meters, take your total fabric weight and divide it by 1.5. Then calculate for any flow mesh, which uses 700 grams of resin per square meter regardless of laminate thickness.

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What is infusion Moulding?

Like vacuum injection with a counter mould, RIM is a double- mould process. First, the dry fibres are laid in a metal mould. Under moderate pressure the resin is pressed into the mould and saturates the fibres. The mould is heated to cut down on cycle time.

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