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<blockquote data-quote="AJEL" data-source="post: 91110" data-attributes="member: 1480"><p>My commercial compressor has 160-190psi, in a 160 gallon tank , I have a main line to the lab 5/8 copper chilled with 2 dryers. The volume for air is sufficient, and would be for the flexite machine (I sold my flexite machine in 1985, when I stopped doing flexibles for a few years). I have a Myerson Flexipress the air connection from the machines regulator to the internal components is 2mm. more than enough for nylon materials, the PMMA Flexite MP requires a bit quicker and more forceful compression, also the flexipres has a max setting of 138psi 9.5 bar a smidge under what flexite recommends. And no you cannot compensate by increasing the temperature (only boils the material and discolors it),I have tried a preheated flask hard to hold but helped a little. You should check your TCS machines settings I believe they max out at 125psi (8.6 bar) every PMMA that I have seen for thermo seems to require 9.6 bar, you might want to exchange that TCS for a flexite machine.</p><p>now as for the MP you can reline it with PMMA of any kind. </p><p>All dentures in my lab are relined with the same material used in their construction if I made the denture I have on record the material I made it out of, I have practiced GMP for a little while. I am a registered vinyl lab back to 1979, so I have some of those to still contend with but Astron is only 3 miles from my place so I can always get fresh material. For allergy patients I still inject a few 1180 dentures per year.</p><p> As for using type IV stone it works fine for nylon, just the denture might get broken & depending on the expansion rate it might not fit as you seem to think, and shell blasting doesn't work (walnut shells are softer than type IV) and separators tend to be spotty, Sol recommends using type III vac mixed, smoother & doesn't break dentures during deflasking.</p><p>As for relining nylons, elsewhere on the forum it is discussed quite a bit, flasking is the only way, we call it jumping a case it takes a little longer than making a new in many instances. The one material is fluid entering the material in the flask is not so liquid, there is a solvent that can be used "Valplast Val-Fuse" being the most common nasty stuff, and there is often a line between the two and sometimes separation. Really not worth it most of the time, but a trick to keep in your bag when needed. Then if you are worried about contaminating the patient with an approved proven material like the PMMA's you should check the chemistry on nylon fusion chemicals.</p><p>I have to time myself so as to not spend to much DLN and I have some bruxes to get back to now.</p></blockquote><p></p>
[QUOTE="AJEL, post: 91110, member: 1480"] My commercial compressor has 160-190psi, in a 160 gallon tank , I have a main line to the lab 5/8 copper chilled with 2 dryers. The volume for air is sufficient, and would be for the flexite machine (I sold my flexite machine in 1985, when I stopped doing flexibles for a few years). I have a Myerson Flexipress the air connection from the machines regulator to the internal components is 2mm. more than enough for nylon materials, the PMMA Flexite MP requires a bit quicker and more forceful compression, also the flexipres has a max setting of 138psi 9.5 bar a smidge under what flexite recommends. And no you cannot compensate by increasing the temperature (only boils the material and discolors it),I have tried a preheated flask hard to hold but helped a little. You should check your TCS machines settings I believe they max out at 125psi (8.6 bar) every PMMA that I have seen for thermo seems to require 9.6 bar, you might want to exchange that TCS for a flexite machine. now as for the MP you can reline it with PMMA of any kind. All dentures in my lab are relined with the same material used in their construction if I made the denture I have on record the material I made it out of, I have practiced GMP for a little while. I am a registered vinyl lab back to 1979, so I have some of those to still contend with but Astron is only 3 miles from my place so I can always get fresh material. For allergy patients I still inject a few 1180 dentures per year. As for using type IV stone it works fine for nylon, just the denture might get broken & depending on the expansion rate it might not fit as you seem to think, and shell blasting doesn't work (walnut shells are softer than type IV) and separators tend to be spotty, Sol recommends using type III vac mixed, smoother & doesn't break dentures during deflasking. As for relining nylons, elsewhere on the forum it is discussed quite a bit, flasking is the only way, we call it jumping a case it takes a little longer than making a new in many instances. The one material is fluid entering the material in the flask is not so liquid, there is a solvent that can be used "Valplast Val-Fuse" being the most common nasty stuff, and there is often a line between the two and sometimes separation. Really not worth it most of the time, but a trick to keep in your bag when needed. Then if you are worried about contaminating the patient with an approved proven material like the PMMA's you should check the chemistry on nylon fusion chemicals. I have to time myself so as to not spend to much DLN and I have some bruxes to get back to now. [/QUOTE]
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