Pre-Loaded Injector ?

[AGSS]

Hello all, I am still considering buying one of Delta's kits. Today I was able to try a Glass Mechanix bridge and injector. It did a great repair, however That whole pre-load the injector and hope the resin doesn't fall out thing just seemed a little complicated. Does Delta's injectors load this way? I understand the logic behind it, It really pulls a good vac, just complicated.

[GlassStarz]

I use the LR injectors which are pre loaded I find they are outstanding and dont lose the load early I prefer them for verticle glass that said I find my Delta rig sticks to frozen glass better I think its the stuff the cup is made of but im not a science weinie just know it seems to work better

[SGT]

To the best of my knowledge, all injectors are resin preloaded. It either pulls a wet vac (resin is introduced into the break prior to pulling an initial vac cycle and requires pressure cycle first) or dry vac (suspended resin is introduced into the break after initial vac cycle). Either system the resin is inserted into the injector first.

There are certainly many schools of thought / opinions on which system works best with a one primary focal point on vacuum capability.

I use DK injectors and get incredible results. IMHO, I do not know how much better any other system could get the repairs to be honest. A properly filled repair is all that matters whatever system you use. It then boils down to speed and resin quality. The general concenus by techs that use non DK equipment is that it DK does not pull enough vacuum.

Jeff, can you post DK position on vacuum vs. other systems to help this person out? I know you posted on this before but cannot find it.

Anyway whatever system you use, master it and go from there.

Good Luck.

[Coitster]

Delta doesn't happen to think that a Dry Vac is nessasery. I have had this conversation with them before.

[screenman]

SGT,

Resin preload means you place the resin in the injector before you place it against the screen, Delta does not lend itself to doing the very well. However I do agree they have a well made product. It is not only the tools that make a good job it is a well trained tech working with them that helps.

[SGT]

SGT,

Resin preload means you place the resin in the injector before you place it against the screen, Delta does not lend itself to doing the very well. However I do agree they have a well made product. It is not only the tools that make a good job it is a well trained tech working with them that helps.

Got me on an pre-load interpertation technicality! Good point on technician ability as that is where all repairs start and finish!!!!

[Jerry Martin]

A lot of the successful use of injectors depends what kind of equipment you first learned on.
I learned on the Ultra Bond preloaded injector and have since acquired a used DK injector. With the UB, once it was in place, I pulled a vacuum, waited a minute to draw the air out and the pumped in resin, then if needed, pull a second vacuum.
The DK injectors it is different and bewildering. I am having a lot of trouble understanding the method.
With the DK injector, you have to have the injector in place, load the resin (which is difficult on a flat glass) then screw the injector down.
My problem is the injector doesn't have any down pressure to fill all those stubborn little spider legs.
Input would be greatly appreciated on this subject.

[Mr Bill]

The DK injector plunger is spring loaded. Before you screw it into the body of the injector, pull back in the knurled handle and turn it 1/4turn to the right to cock it.
Then screw it into the body of the injector.
Next turn the knurled handle 1/4
turn to the left to release it.
The injector should now slide forward and pressurize the resin.
Have you been doing this?

[SGT]

A lot of the successful use of injectors depends what kind of equipment you first learned on.
I learned on the Ultra Bond preloaded injector and have since acquired a used DK injector. With the UB, once it was in place, I pulled a vacuum, waited a minute to draw the air out and the pumped in resin, then if needed, pull a second vacuum.
The DK injectors it is different and bewildering. I am having a lot of trouble understanding the method.
With the DK injector, you have to have the injector in place, load the resin (which is difficult on a flat glass) then screw the injector down.
My problem is the injector doesn't have any down pressure to fill all those stubborn little spider legs.
Input would be greatly appreciated on this subject.

Jerry,

Not familiar with Ultra Bond set up, but I would think with the pre load systems you should not have to pull an additional wet vac if they truely remove all air from the break prior to filling. I feel they do not and my my mindset is this... They claim to remove the air from the break prior to filling so why would there ever be any air re introduced? If you truely remove air from any cavity it would collapse. What happens when you do this to a soda can? It collapses.

I think what these systems do provide in a crude analogy is a slingshot effect...The vacuum being the rubber band and the resin being the ball. The release of the stored energy from the rubberband or vacuum creates inertia/velocity on the ball/resin. That was just my outlook, from a limited background on these systems.

Not sure why you would be loading the DK injector prior to the tip seal being seated on the glass? Also, by FLAT do you mean verticle? If so, for verticle you need to create a slight pitch using the leveling screws so the resin stays at the tip. Becareful with tip pressure!

I think both sytem types have pitfalls though. Good Luck.

[screenman]

Jerry,

You can introduce pressure by pushing down with your thumb on the piston once you have released it. This takes a little practise because most poeple have a tendency to pull up on the bridge or injector body, whilst pushing the piston down. This then breaks the seal. We have found when using thumb pressure it is a good idea to watch the seal and as soon as it starts to expand that is usualy enough. Mind you on those stubborn ones I tend to get a bit more aggresive, not to be tried by anyone short on experience.