What exactly is injecting?

[Laydog]

I have seen dozens of posts that refer to an injecting machine or utencils. But what exaclty is injecting? What are the pro, cons, benefits, etc. I am new to pouring, so you may have to dumb it down a little.

Thanks in advance guys.

[TTDuckman]

Using mechanical means (either machine or manual) to inject plastic into a 2 piece mold. You can achieve high production and inject in molds that handpouring would not be able to successfully do. Cons, extremely expensive, both molds and machines. You measuring things in the high hundreds if you are lucky and mechanically inclined, to several thousand dollars.

Tim

[Delw]

I have seen dozens of posts that refer to an injecting machine or utencils. But what exaclty is injecting? What are the pro, cons, benefits, etc. I am new to pouring, so you may have to dumb it down a little.

Thanks in advance guys.

Injecting is using Pressure to force hot plastic into a mold.

Means of pressure is air pressure mostly. However you can also use a tube with a slip fit built into the bold like a push rod to shoot plastic into it.

Cheap injection can be those sirygns from jans net craft ( if you use these be careful as the will melt at aorund 350 degrees, I do hve some customers that use them with great success however the wear welding glooves ( long ones) just incase.

you can make your own from 300-500 and even up using a pressure pot.

you can buy one from lurecraft and winesco (sp) from 3k-5k they are low pressure generally 12psi max

Sta-Warm is coming out with them in a few months they will run around 2-3k as well. I think theres will be 18psi max ( has to do with osha regualtions)

Zorn molds makes a nice system actually they have a few different ones

they are the best in the business systems will run 15k-45k and beyond.

th zorn system is the only one that will shoot multible colors of the ones listed.

The molds in the Zorn machine are also watercooled and shoot at a very high temp. They can shoot 70+ baits and be colled in under 1 minute.

injection is needed on some baits mainly cause some baits you just can pour.

[Laydog]

So the primary reason is to get a cubic buttload of plastic poured in a very short amount of time... and it seems that the only drawback is the massive cost.

Thanks for the info guys, I appreciate it.

[Delw]

So the primary reason is to get a cubic buttload of plastic poured in a very short amount of time... and it seems that the only drawback is the massive cost.

Thanks for the info guys, I appreciate it.

Actually no,

if you need to produce less than 5000-10000 stik baits a week its easier and cheaper to pour them by hand. same goes for any 2 piece mold that pours while closed.

the only thing you need would be a hot pot that holds plastc.

if you need to produce alot more than yes a injector is the way to go and that would be a zorn machine. The smaller injectors are nice just to play with but your not going to save any time or money( unless they have to be injected) your going to need lots of molds to feed a hand made injection system as they need to cool off.

with 5 gallon sta-warm pots you can get by with about 20-30 molds to keep the cycle going. with a hand made injector your looking at 60+ molds to keep the cycle going.

[gcl58]

becareful on the wenesco. there temperature zones had some big issues. its been a while since i talked to them, i had to help a few of there clients on retooling some heat zones and mixing paddles.