Bruno wrote:But seriously Jeff, in the picks I see no seals, so how do you create a vacumm in a non sealed enviroment? I have your injectors(old ones), and have yet too see any vac. Some explinations would greatly help us to understand the theory behind the injector.
Okay, so this has been gone over in threads before, and I don't like to do it because it sounds like a sales pitch against other companies. Since i'm asked again though, here goes:
Two types of pressure/vacuum. Air pressure, and hydraulic pressure. Hydraulic pressure simply means no air in this case.
First, our end seals are not o-rings, and only show a small fraction of the seal from the end, the rest is inside the injector. This system creates all the vacuum needed to perform an excellent repair. That's the ultimate goal here isn't it? Windshield repair is about removing all air, refilling with optically matched resin, curing it flush, and having it hold. No one sane would disagree with that.
There are two schools of thought. One that is propagandized.err...promoted by unnamed competitors says that the more vacuum you pull, the better the repair. Makes sense right? They even now at trade shows have this catchy little demo where they hold the injector upside down on their finger with the vacuum, and tell potential customers to have us try that. Well that's just Neat-O. In their manual, I don't see that as the preferred method for doing what the injector is designed for, which is doing an excellent windshield repair.
They've stopped doing repairs at trade shows, instead just choosing to do their circus act. When they send potential customers to us and ask us to do it, we simply demonstrate (or let them try) a repair, which turns out beautifully. If theirs works as well, why have they now stopped doing repairs at every trade show we're at?
The problem is, any time you're using internal o-rings or seals, you are creating a closed, air pressure system. This means you pull this 5,000 pounds of vacuum (or whatever their marketing campaigns are up to nowadays), but where does the air go? Stays right at the top, because the internal o-ring won't allow it to escape. Then, you have to put it in the pressure cycle, which means the piston pushes on this air pocket, and the
air is what you're trying to force resin into the break with. Ever wonder why if their vacuum is so great, why you have to do 2, 3, or 4 cycles, just like ours. Seems to me if vacuum was magic, you wouldn't need to keep vacuuming after you've already pressured.
With a hydraulic system like ours, we have no internal o-rings. You pressure the resin in, pull a quick vacuum (30 seconds), and our system allows the air to completely evacuate from the system. On the next pressure cycle, the piston is once again directly on resin, pushing resin directly into the break.
Okay, so that's the difference.
I am certainly not saying that repairs can't be done with an air pressure system. I am simply saying our method is easier and quicker (quicker according to the manual of a specific air pressure company that says stars take 45 minutes, when ours takes 15).
The other difference, is you will see companies out there that say it is simply impossible for our system to work, and we're "lying." Well, we've been in business since 1984, have satisfied customers all over the world that would be slightly confused if they were told our system can't possibly work because it doesn't pull enough vacuum.
So, our company says air pressure systems can work, just not as efficiently as our hydraulic method. Those companies say that ours can't work at all, and we've been lying for 22 years. You be the judge.
One last thing, if anyone is still reading this far. Bruno, if you're having problems with our bridge "not pulling enough vacuum," you've got a different issue. It's simply not a vacuum problem. Give us a call and we would be more than happy to provide unlimited technical support.
Delta Kits, Inc.
Any more questions though, shoot them over. I'm still trying to figure out why I get all these "vacation" hours that no one lets me use! 