Stillwell Posted March 23, 2021 Report Share Posted March 23, 2021 (edited) Hey guys. I’ve read about 25 threads on dents and almost all of them have to do with the stick bait “thumb” dent. I’m looking for advice on eliminating these dents on my curly tail lurecraft mold. I’ve shot between 320 and 350 fast and slow. Just can’t get rid of them. Using Bait plastic 262 blend. ***EDIT: I also hold pressure 10-15 seconds each time Edited March 24, 2021 by Stillwell Quote Link to comment Share on other sites More sharing options...
Bass-Boys Posted March 24, 2021 Report Share Posted March 24, 2021 Looks like no venting on the mold above the tail area ? Quote Link to comment Share on other sites More sharing options...
mark poulson Posted March 24, 2021 Report Share Posted March 24, 2021 I hold pressure on my injector for at least five seconds after I've filled my molds before I move to the next cavity, and no more dents. I also don't shoot above 325 degrees. Quote Link to comment Share on other sites More sharing options...
Stillwell Posted March 24, 2021 Author Report Share Posted March 24, 2021 17 minutes ago, mark poulson said: I hold pressure on my injector for at least five seconds after I've filled my molds before I move to the next cavity, and no more dents. I also don't shoot above 325 degrees. Yes, sorry. I forgot to add that into my original post. I will add that now. I definitely hold pressure as well. Quote Link to comment Share on other sites More sharing options...
McLuvin175 Posted March 24, 2021 Report Share Posted March 24, 2021 Those dont look like dents from shrinkage due to cooling, that looks like its coming from entrapped air from not venting properly. How is the mold oriented when you shoot it? Quote Link to comment Share on other sites More sharing options...
Jig Man Posted March 24, 2021 Report Share Posted March 24, 2021 It wouldn’t take much to add a couple of vent lines to the upper portion. Quote Link to comment Share on other sites More sharing options...
Frank Posted March 24, 2021 Report Share Posted March 24, 2021 Should have vents on the top of every bulge. Does look like air trapped at the top of the bulges. Use a utility knife and scratch vents from the top of every one to the outside of the mold. It will give you vents that won’t be seen in the final product. Same with the middle parts but they will have to go down and out cause you cant go up. Some mold makers put a hole in the middle for the air to escape. 1 Quote Link to comment Share on other sites More sharing options...
OIR Posted April 2, 2021 Report Share Posted April 2, 2021 use a metal scribing tool scribing new air tunnels in aluminium mold - YouTube 1 Quote Link to comment Share on other sites More sharing options...
