I'm injecting Bear's 5.25" side-port mold. WIth one color, no problem, eveything comes out great, but whenI add a tip, and then pour i get one or two bubbles (ranging from bb to a pea) in the top cavity near the tail/body splice.
I assume air is getting trapped in there and the vent is stopped by the pre-poured tail. Strange thin is, that even if i try and leave the top cavity solid (no tail insert), i still get the bubbles.
Would adding an additional vent at the splice be effective? or, am I ruining the mold?
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6 replies to this topic
#2
Member Posted 08 February 2010 - 06:34 PM
I'm injecting Bear's 5.25" side-port mold. WIth one color, no problem, eveything comes out great, but whenI add a tip, and then pour i get one or two bubbles (ranging from bb to a pea) in the top cavity near the tail/body splice. I assume air is getting trapped in there and the vent is stopped by the pre-poured tail. Strange thin is, that even if i try and leave the top cavity solid (no tail insert), i still get the bubbles. Would adding an additional vent at the splice be effective? or, am I ruining the mold? #3
Advanced Member
Posted 08 February 2010 - 07:50 PM
Have you tried talking to Bear? I think I would do that before I started cutting on a mold. Try warming the mold a little first. Are you topping off the mold? You need to do that on the multi-cavity hand inject molds. #4
Member Posted 08 February 2010 - 07:56 PM
1. It tends to gert worse as the mold worms up, so that isn't the problem.
2. I don't have dents (ususally associated to shrinking plastic), I do top offthe molds. And, the problem doesn't appear with single colored baits, only with colored-pre-poured tips. Has anyone else experienced this? I tried injecting faster, slower; raising and lowering the temp of the plastic, with no noticable diference. #5
Advanced Member
Posted 08 February 2010 - 08:54 PM
1. It tends to gert worse as the mold worms up, so that isn't the problem. 2. I don't have dents (ususally associated to shrinking plastic), I do top offthe molds. And, the problem doesn't appear with single colored baits, only with colored-pre-poured tips. Has anyone else experienced this? I tried injecting faster, slower; raising and lowering the temp of the plastic, with no noticable diference. Is the pre poured tip covering a vent hole ?? #6
Member Posted 08 February 2010 - 10:56 PM
Robalo
The mold has vents machined on the face of the mold so the mold is vented. I have shot quite a few of these and do not have to change the way I shoot the molds. I have not had anyone else have this problem that I know of yet. Give me a call tomorrow and I will do what it takes to get you going. Maybe something is wrong with the mold and I need to swap it out. I do not know what is going on with it as I have not any complaints before this one. I wish I could tell you what was going on with it but I do not know. Call me and I will swap the mold out and try that. Bear 985-969-1390
Is the pre poured tip covering a vent hole ?? Edited by bear21211, 08 February 2010 - 10:57 PM. #7
Member Posted 09 February 2010 - 12:42 PM
I am inclidened to believe Iit's something I am doing wrong and not the mold, but i'll get in touch.
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