Injection Problem

[MadManz]

That is my set up......I am using a MED Size injector to make the small "Beaver" style bait. If you look close the bait is hollow....Everything else looks good???? What am I doing wrong?

I tried to hand pour this and it never fills up the tails? What should I do?

Thanks

[Jig Man]

I am by no means an injector expert but I have found that on some of mine I have been injecting too fast and have to go back and inject again, making sure that there is overflow to get the air out.

[Frank]

That type of bait has alot of shrinkage due to the large body. I think it is sucking air after you remove the injector. You will need to make sure the sprue is full till it cools. And remember the hotter the plastic the more it will shrink. I really like mold with tall sprues so you dont have to what for that. Maybe try this hold the injector on there till it cools and see if the bait is good then. Not that you would do it like that but just to see if that is the problem. Frank

[biggun]

Ive got an hand pour similiar to that its one of bears kodiak craws and ive poured quit a few in it, the only time the claws didnt fill was if the plastic wassnt hot enough.

[Delw]

That is my set up......I am using a MED Size injector to make the small "Beaver" style bait. If you look close the bait is hollow....Everything else looks good???? What am I doing wrong?

I tried to hand pour this and it never fills up the tails? What should I do?

Thanks

did you by chance get that mold off of ebay? reason I ask is it looked like a scrap one that was made many years ago. as there are no airvents in it.

There should be airholes in the wings, and at the end of the feet, the later modles had a few others as well. they poured fine from the begining the smally one poured the best of all of them. as far as injecting then theres a few problems.

first it needs a air vent between each cavity the width of the mold, then you need to scribe a airvent from each wing to the airvents between the cavities.

for the airvent between the cavities use a hack saw as its no big deal. for the wing ones use a slotted screw driver tip and scribe the line( pull towards you its easier) then you need to press those screws out and hand lap the faces of both sides flat. lay a pcs of 180 wet dry paper on something very flat. coat the paper with wd-40 then do a figure 8 with the mold. a few times.

then press screws back in and your ready to go.

the reaosn you need to put a airvent in between each cavity is so when your shooting one cavity the air wont got to the one you just shot causing dimples another reaosn why injection molds need to be very flat.

one other thing, you may want to delete that pic so you dont get a letter from Andre's Lawyer. I got one thats why I quit making them.

Delw

[GB GONE]

Simple fix as previously noted. Just pour more plastic into the sprue area when it starts sucking the plastic in.

What I do with other molds that are similar and need injecting is inject all the cavities and then go back and squeeze a few drops more into each sprue area.

If you are real inventive (I should send this to Toadfrog.. LOL), You can attach a piece of tin or flashing onto each half of the mold so that when the mold is closed, it will form a box. Then, you can just inject each cavity and then fill into the box without going back to each cavity. Guess this isn't really nutty, just an idea I have used...

Jim

Edited November 10, 2010 by ghostbaits

[GB GONE]

I also concur with Del on the whole photo deal, better go back and edit that post. Take a pic of the bait itself but close up to just the hollow area. Otherwise, you will be getting a letter soon.

Jim

[MadManz]

Going to try that, Thanks!

Only a moderator can delete it for me....

did you by chance get that mold off of ebay? reason I ask is it looked like a scrap one that was made many years ago. as there are no airvents in it.

There should be airholes in the wings, and at the end of the feet, the later modles had a few others as well. they poured fine from the begining the smally one poured the best of all of them. as far as injecting then theres a few problems.

first it needs a air vent between each cavity the width of the mold, then you need to scribe a airvent from each wing to the airvents between the cavities.

for the airvent between the cavities use a hack saw as its no big deal. for the wing ones use a slotted screw driver tip and scribe the line( pull towards you its easier) then you need to press those screws out and hand lap the faces of both sides flat. lay a pcs of 180 wet dry paper on something very flat. coat the paper with wd-40 then do a figure 8 with the mold. a few times.

then press screws back in and your ready to go.

the reaosn you need to put a airvent in between each cavity is so when your shooting one cavity the air wont got to the one you just shot causing dimples another reaosn why injection molds need to be very flat.

one other thing, you may want to delete that pic so you dont get a letter from Andre's Lawyer. I got one thats why I quit making them.

Delw

[daveh]

Going to try that, Thanks!

Only a moderator can delete it for me....

hey mike it worked for me when you lent it to me. the problem is your a rookie. lol

also i told you abut that bait. it does have air holes. as it fills to the to let it over flow.