hpssports

Core Shots

24 posts in this topic

Ok, I've done laminates, marbles, swirls, etc, but have not yet done a core shot. Every video I've watched a single cavity mold has been used. Does it only work with single cavity molds or will a multi cavity work also?

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I've only gotten cores with single cavity molds. If it can be done with multiple cavities someone is holding that secret very very close to the vest.

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It only works with single cavity. You can just shoot the mold with scrap and leave all cavities full exept one. Now it's like you just have a one cavity mold. It takes some messing around to determine how much of each color to use but you can get fairly consistent.

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I can think of insert solutions, but mold manufacture solutions are not going to be cheap. Also, the production would be a two stage pour, with the inserts needing to be withdrawn - complicated.

 

Dave

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Depends on the mold. 

 

I sometimes do Mk II Curly Buzz Frogs (bottom inject) by pouring one color into the mold, then shooting another color thru it. 

 

http://www.tackleunderground.com/community/gallery/image/13103-shoot-thru/

http://www.tackleunderground.com/community/gallery/image/11078-core-frog/

http://www.tackleunderground.com/community/gallery/image/8962-curly-tail-frog/

Edited by Bob La Londe

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Can be done with a 100 cavitys at once, just got to have the mold setup right. :)

 

Of course, the large manufacturers do it all the time in their large production molds. 

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I do the "pour some into one half" method, too, but wishn4fishn/Brandon's baits are amazing!  I'd love to be able to make laminates like his without investing a fortune.

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I do the "pour some into one half" method, too, but wishn4fishn/Brandon's baits are amazing!  I'd love to be able to make laminates like his without investing a fortune.

Mark, you can do this too. Very nice baits, indeed. Grab a single cavity mold and hand pour some plastic into your sprue hole. Whatever you want the outside color to be. Take a guess at 1/2 the plastics to fill the mold. Then inject whatever you want your core color to be just after your hand pour. Takes a bit of planning and coordination but the results are nice.

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Horizontal or vertical lay of the cavity make a difference? 

 

In my experience yes, you want a side inject mold for the best results. 

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Hi everyone,A hand core inyection proces could work shooting the half of plastic on a single cavity, close the sprue of the cavity with a cork plug or any other kind of diy plug, give some 180 degres half turns to the mold and stop after plastic get solid like roto molding proces. This should result in a hollow bait. Now open your mold and see if you need to cut the tip near to the sprue for the second color.

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on a single cavity side inject mold, pour the outside colour in the runner, then immediately inject the core colour into the mold, it will push the core colour through the outside colour

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I have a bobs mold 706 craw. 4 cavity. I cut the sprue where the top two cavities can be poured. I have each color I do this to down to a cadence and stream thickness. I pour it to what I need and shoot the rest.

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Edited by RAWJigs
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Guys, It is really a simple concept, You have to have displacement. If your brave, Cut a groove in the tail so the plastic keeps pushing out, hit with the core color fast till you see it just come out, Problem solved, Core shot multi cavity mold....

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Rawjigs....can you post a pic of your modified mold?

I didn't modify it per se, just take the big sprue and cut it to where i can only pour the top two ... but I will post what I do tomorrow afternoon after work.

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