6 replies to this topic

[MonteSS]

Cant get the bottom of this Dels mold to inject without voids.

Tried different temps and slow and fast.

Vents on both halves.

Any thoughts?

Thanks....Bill

Edited by MonteSS, 02 February 2012 - 11:23 PM.

[bryanmc]

You could try increasing the size of the vents slightly by dragging an awl or small screwdriver down the vent channel.

[SHK]

inject slow and hold pressure for a 10-15 count. i would try that before modding the mold

[toadfrog]

x2 and cap off the sprue hole with excess plastic . Give a little more time before de-mold.

[powerworm]

i have 4 of those molds in 5" and they all work better than the senko molds never had a problem with them if you are getting dents they are caused by the smaller mid section cooling before it draws enough hot plastic down that far to fully allow the bait to stay expanded against the cavity and make a whole bait. might try a little hotter plastic to leave the center section warmer, longer.

[Jig Man]

Have you tried warming the molds before you begin or is this happening with warm molds? If they are warm then I'd try slower. My tube tails don't flow well unless the molds are warmed up and the plastic is good and hot.

[joshimotoson]

When you say "bottom" of the baits. I am thinking the end of them. In other words, the part that's farthest from the injected end.

If that is the case, I'm going to suggest something to try but want to tell you that Del would probably never recommend it.

It has the potential to be dangerous and should be at your discretion.

But I would put the mold in a vise sideways (to hold it securely). Yes, the sprue opening pointing to the side and then inject it.

Now to be ultimately safe, leave the injector in the sprue until
you're sure that the plastic has cooled, or else the plastic will fall right back out and lead to bad things.

My theory is that with the cavities now in the horizontal position, the hot plastic won't plug up the vents before you completely fill the cavities.

This is just a way to eliminate one potential issue. I DO NOT recommend that anyone make this a common practice.

But if you use common sense and make sure you have plenty of protection from getting burned you could try it.

Josh