This is My Really Hard Question:
I have a 70mm EDF [Electric Ducted Fan] it generates 2.45 kg force at maximum thrust. I then calculate its exhaust efflux velocity to be something like 526 m/s based on an Air density of 1.21kg/m³ to get the same volumetric flow.
Mass=Volume*Density
2.45kgs...
One of Vendors, makes Bronze Impellers from 20 to 300 kgs is having issues acheving the full elongation values for a nominial (88/10/2) Bronze Compostion. That requires a 13% minimium elongation value to comply with AS1565/Grade C92610A.
From what I can discern the chemical compostion complies...
Has anybody had any experience, with Designing the 'Perfect Pouring Basin'? Current thinking tells us that the offset 'wier' or step design is the best.
however when dealing with the aspect of preventing splash back when a ladle has gets too high above a mould. Say 500mm or 1½' a undercut design...
About to do some heavy wieght filtration trials for Austenitic cast iron 15-6-3 around the 1000 kg mark
using 75x75 or 100x 100 grey foseco sedex filters.
what is a appropriate kg/cm² wieght that I could use?
Got data for SGI, Grey iron, High-Chrome iron... But nothing for austentics...
I work in a foundry exclusivly 'jobbing' and 'semi-jobbing' work - the normal rules for lean don't really seem to fit or hard to find application.
What's your best piece's of advice? thanks in advance
What works best for horizontial pouring and ingating of impellors- thin sectioned?
1,Running an impellor from the centre boss
2,Running an impellor from outside edge on bottom shroud
3,Running an impellor from both bottom and top shroud edges
4,Running an impellor from internal inner flange on...
Other than dilution with clean copper. or full scale oxidation refineing is there a system availble that enables the drop in lead% some loss in zinc o.k. from say 6.5% to 7.5% to a target of 5% for the production of 85-5-5-5 ?
i.e. would a Phosphate or silica based with a oxidiser--as a fluxing...
Looking for infomation on the finer pionts of risering Austentic cast iron, what riser/neck/casting modulus values are used to achieve general purpose soundness?
Does it have a more pronounce secondary shrinkage phase?
What ingate speeds have you found works well in practice?
