Allow me to introduce myself...

[GGWSR]

Hi splitpit..."wasted technology"...I'm wondering was that sarcasm? If so, what do you know about it being so?

[screenman]

I think the point is,using the pump method is very old hat and lacks in many factors the benefits of hydrualic systems.

[AGSS]

I really am getting confused here?

Just Making a joke thats all...

Jeff is the ADMIN of this board!

[wilz]

Hello Wilz, Maybe I can help you so you won't get confused.. Its just an American humors.. They giving Jeff Higgins a hard time because he used to work for Delta kits, and now he a CEO (Owner) of Glass Mechanix now..
Hope you still not confused.

P.S. Welcome to the forum Jeff!:eusa_whis

The owner of Glass Mechanix? Now he will have an oppourtnity to change his vehicle.:eusa_danc

[cazador]

Unless you block off the surrounding air around the chip , star or crack you are working on , this vacuumcycle keeps on sucking and sucking until we all run out of air,........wright ? How does this vacuum/pressure machine work ?

[screenman]

Cazador I am struggling to understand you on this one. The pump system works the same but not as well as any other system. The difference is it uses a remote pump as opposed to most normal injectors. The downside to this system as I mentioned earlier is that it uses compressed air from the remote pump to force the resin in. Now anyone knows that if you put a liquid into a pressurised container that contains both air and liquid then the said liquid will absorb some of the pressurised gases. This is often released when the resin cures. This is the reason most modern systems use direct piston pressure onto the resin. Oh and of course the injector is what seals the chip saving us from all be left without air each time these guys do a repair.

[cazador]

What I meant to say , when the grommet from the injector is positioned over the chip it does't cover it 100% , there are stil leggs running left and right byond the grommet ( rubber seal ) from where air will be sucked into the chip on the suction cycle .
My experience is while alternating the cycles , vacuum & pressure , I can see the resin creep into the leggs and therefor pushing the air out ahead of he resin into the enviremont on the pressure cycle.
I keep alternating vacuum and pressure until the leggs are filled with resin and no air is present anymore.
Does the cup of the vacuum/pressure pump cover the chip + leggs ?
What about when there are leggs 4 or 6 inches long , probably I'm still missing out on something.
Hellup!! ( That's Dutch for Help Me ).

[screenman]

Cazador, most chips, starcracks, combinations etc. the only entry point is the chip and the rest is subsurface so as long as the impact point is sealed then you have a closed enviroment. Of course this is not the case with long cracks and those that have breaks to the surface. You might be seeing movement of resin in most of your repairs but if they were all open to the surface you will have resin seeping out of the legs etc. This very rarely occurs.

On long cracks of course you have no need for a vacuum as the air has somewhere to escape to. So push the resin or use capilary action to chase the air out. In most cases you can feel a surface exiting break by moving a scribe across it. There are many optical examinations you can use to determine the way the damage runs but I for one would find it hard to explain without showing you in real life.

I have just reread your post and find that you may have been misled in training as to where the air goes when you fill a leg. More often than not the air will either compress and then come back past the resin when you release the injector pressure or some will find its way past whilst you are filling as the air has a lot lower density than the resin. In very very few cicumstance does it run out of the end of the legs, if it did the resin would follow. Unless like most of the guys over here you did not use a UV shield. As in that case it would set before it even got to the end of some legs.

[StarQuest]

Screenman,

I like the power vac and pressure system I've been using for the last 5 years and to be honest haven't experienced any of the problems you have described. Actually, the same exact system, resins and training I received took 1st place in the 2006 Las Vegas Windshield Repair Olympics!

To call it "Old Hat" technology, I would then ask you why this system took the "GOLD" ?

[screenman]

Luck. As I have mentioned many times whatever works for you is great. Please list some of the advantages of a remote pump system as I have listed some of the disadvantage I see that it has. Please do not just jump and say I am wrong, bring some more evidence to the table I am willing to listen and learn. me