robalo01 Posted January 3, 2014 Report Share Posted January 3, 2014 I would like to see more molds with slide bars to make colored tails. Injecting the tail separately and placing in a mold to inject again isn't very efficient. Why don't we see these more? Quote Link to comment Share on other sites More sharing options...
gone2long Posted January 3, 2014 Report Share Posted January 3, 2014 I'm gonna say it's a cost thing lots of difficult programing and machining there with the tight tolerance. Machine time costs money and I think some don't want to tie up there machines. Quote Link to comment Share on other sites More sharing options...
ipt Posted January 3, 2014 Report Share Posted January 3, 2014 what do you mean by a slide bar? i dont spend money on tail molds myself, i just shoot my tail color and then cut it out where i want and re-shoot my main color. Quote Link to comment Share on other sites More sharing options...
gone2long Posted January 3, 2014 Report Share Posted January 3, 2014 (edited) Basstackle still offers one model in 2 different sizes search slide bar on his site. It's my understanding that the big boys use them on their huge injection molds. Edited January 3, 2014 by Gon2long Quote Link to comment Share on other sites More sharing options...
DaveMc1 Posted January 4, 2014 Report Share Posted January 4, 2014 (edited) Basstackle still offers one model in 2 different sizes search slide bar on his site. It's my understanding that the big boys use them on their huge injection molds. and they use computer controlled electric actuators to slide them as well. Edited January 4, 2014 by DaveMc1 Quote Link to comment Share on other sites More sharing options...
gone2long Posted January 4, 2014 Report Share Posted January 4, 2014 Yeah you could imagine how long it would take the way we do it in scale, putting 20,40 or even 60 pre shot tails back into a mold Quote Link to comment Share on other sites More sharing options...
carolinamike Posted January 5, 2014 Report Share Posted January 5, 2014 Gon2long you are right, I've got some molds with slide bars that have 90 cavities in them. Davemc1, you are right about the actuators but they are pneumatic, not electric. To do hand pours with slide bars would be a little challenging, speed would be the main factor. On the big molds you're looking at a two second injection time with very high pressure for the tail, to get a good tail bond you would have to shoot two colors in three seconds. Shoot the tail, move the slide bar, and shoot the body. It would definatly take alot of practice but I do think it could be done. 1 Quote Link to comment Share on other sites More sharing options...
CNC Molds N Stuff Posted January 5, 2014 Report Share Posted January 5, 2014 (edited) The big advantage to slide bars if you can get the time right is bonding. The tail plastic is still hot enough to remelt and bond to the body plastic when it comes in. I don't know if its faster for hand injection than a separate tail mold. Its certainly more hectic if you are using microwave cups to keep two plastics going at the same time, but doable. No worse than two color laminate injecting for that part I suppose, but with the added task of getting things clear and sliding the bar it will take some practice to be safe and efficient. I do it a little differently. When I make tails I just make tails. I make a bunch of them and toss them in a sealed bin for later. I designed a my tails to either have a tapered join or an interlocked join with the body... or both. This way more of it is exposed to the heat of the fresh plastic coming in, and join tends to hold even if it doesn't get a perfect melt join. The tail mold for the 5" Club-O for example has a tapered cone with a ball on the end. The ball is completely encapsulated in the body. The same with my simple craws. The claws and arms are poured as a unit, and the body flows around the arms. I think a 2-4 cavity mold might not be much faster with a slide bar, but a 10-20 or more might be. I may spend a little time playing with it this year and see. I've still got a couple other promised experimental projects to do in my "spare" time first. Edited January 5, 2014 by Bob La Londe Quote Link to comment Share on other sites More sharing options...
