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Bbob

Hollow Belly Frogs

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Unless you have access to the kind of injection equipment used for commercial plastic injection, you're going to have a tough row to hoe.

I'm not sure what the exact process is called, but I know it's a lot more complicated than what a home builder typically has at his/her disposal.

I would look at making a soft plastic bait out of buoyant material with a hook trough, so you don't have a tone of plastic for the hook to go through.

Think along the lines of a Zoom Horny Toad, or the Air Frog, by Damiki.

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JR - that gave me an idea:

Make the first half mold of the outer shape.

Paint layers of latex inside the cavities until the desired thickness is achieved.

Pour the second half.

Remove the latex.

You now have a two part mold of a thin walled bait.

Dave

Thats a great idea for a hard bait mold Dave!... In fact, i may try this

But i think it would be difficult gluing 2 parts of a soft frog body together

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JR - I had assumed that it was a hard body, I didn't research it, just ran with the problem.

 

Thinking further on the hard body solution, it does not need to be latex. It might be better with a filler, that you can kneed into position in one go. Possibly an epoxy putty or something similar.

 

Dave

Edited by Vodkaman
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:?  :? Could do a cast mold, of the frog, 2 part mold, then make make a slightly smaller frog solid frog suspended by wire coated in mold release, so you would have a thin cavity between the solid frog and the to part mold.. and then inject latex into to the two part mold.. the wire you could insert through the leg holes and the hole where the eye of the hook is to suspend that hard form frog in place to latex cures, of course u need a sprue to pour hot latex in :) and would have to have a split it the frog at end to remove the inner body could make a soft foam rubber inner core .. make it easier to remove.. here is a company that sells the pourable soft foam http://www.theengineerguy.com/


Excuse the typo its not win .. its when :)

 

 

frogmold_zpshqgvuygi.jpg

Edited by northrivergeek
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On 1/18/2016 at 6:53 AM, CNC Molds N Stuff said:

 A few months later I saw a bait by Canyon State Plastics that is very similar to that.  There is a slot in the bottom that opens up into a larger air cavity.  Oddly it even has curly legs.  LOL.  I didn't buy a bag nor have I heard anything about how they work, but they are out there.  Gravity keeps the air in the frog.  

Frog-2.jpg?1321832522   thats the canyon state hollow frog i believe

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