In addition to the pro and con evaluation of air blasting and turbine lasting found in our previous blog, these two methods can also be compared in terms of throwing velocity, applications, and industries.
In terms of throwing velocity. Media thrown by turbines immediately start losing speed the moment that the turbine blade releases it, producing higher intensity blast results closer to the turbine. Larger shot retains its speed better over a distance and is commonly used to maintain intensity while creating a larger blast pattern by positioning the turbine(s) farther away. In contrast, media thrown by air nozzles will continue to accelerate for the first 100-300 mm outside of the nozzle depending on blast pressure and media size and density until the compressed air fully dissipates to the ambient environment, meaning that your best blast results occur a distance away from the nozzle.
Continue reading Air versus Turbine – Balancing Blasting Capabilities and Outcomes, Part 2
Blasting processes for surface finishing vary according to the size, quantity, composition, and desired finish of the work pieces in need of surface preparation. Air blasting and turbine blasting are two of the more common types of blasting. While there is some overlap between the two methods, each carries its own unique attributes and drawbacks.
When comparing these two blast methods, the number one thing to keep in mind is precision versus bulk. Air blasting provides precision surface preparation using a much smaller blast pattern compared to turbine blasting, which delivers large quantities of media over a wide blast pattern, thereby making it ideal for blasting large quantities of parts or larger individual parts.
Continue reading Air Versus Turbine – Balancing Blasting Capabilities and Outcomes, Part 1
Please note these tables highlight the actual requirement and are only a guide.
It is always advisable that your supply exceeds this as there could be other uses and discrepancies, and therefore exceeding the required power, free air delivered (FAD) and volume of air is necessary.
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Shot Blasting Technical Manager
All dry blast systems require dry, oil free air delivered to the process. Small amounts of moisture and oil cause the media particulates to stick together and prevent the free flow of blast media.
Continue reading Air Blasting Tip 9 – Quality And Delivery Of Your Compressed Air For Air Blast Systems
Check and make sure that the air jet and nozzle bore sizes are optimised. It is a fact that when checked many venturie blast systems have air jets and nozzles that are entirely miss-matched.
Continue reading Air Blasting Tip 8 – Nozzle And Air Jet Size Compatibility On A Venturie Fed Blast System
Depending on the air blast process desired, (i.e. a cleaning operation only or surface preparation prior to bonding) it is desirable to maintain and repeat the surface finish time after time.
Continue reading Air Blasting Tip 7 – Surface Consistency And Repeatability
Under the blast media hopper, placed under the base of the cabinet floor or under the cyclone unit, you will find the blast media pick up device, referred to in our introduction Part 1. There are several designs on the market each purporting their advantages, however, in principle they almost always work the same, some designs better than others. It is important to understand how this simple but effective pick up method works as this is critical to the process.
To draw both blast media and air in through this pick up device, it requires to be set up by adjusting the air to media ratio. Once fixed, this is set and need not be changed until another blast media or size is required.
Continue reading Air Blasting Tip 6 – On The Venturie / Suction Delivery System Alternative Regulation Requires Attention
Too few blast media particles provide poor productivity but too many can also have the same effect as the air to blast media ratio becomes too heavy or imbalanced.
Continue reading Air Blasting Tip 5 – Media Flow Regulation Requires To Be Optimised On A Pressure System