Molding Crankbait Bills
12 replies to this topic
Posted 08 February 2009 - 05:44 PM
Just seeing what would be the best way to mold a crankbait bill. Like a bill that goes into the Poes Cranks. I want a mold that will last.
I'm sure this has been posted here but I can't find it. A link to a discussion on this would work.
Posted 08 February 2009 - 06:12 PM
Molding a lip wouldnt be that tough, what is tough is finding a durable casting material that is clear.
Thats why most are injected from high impact thermoplastics or cut or stamped from polycarbonate (lexan)
I've tried casting lips from Epoxy & clear polyester resin years ago. way too brittle.
Posted 08 February 2009 - 06:24 PM
Well, if its a modern wooden rapala, they'll glue in a injection molded plastic lip.
If its a plastic bait, the bill is part of the entire lure body mold, injected as 2 body halves (left & right) then sonic welded or glued together.
Posted 08 February 2009 - 06:27 PM
While I've got you here, are you sharing a PC with another TU member?
I ask because the site is telling me you are posting under 2 different usernames.
Posted 08 February 2009 - 06:28 PM
Yes, I'm talking about something like a Rapala where the bill is molded then inserted into a wooden bait. You said it is hard to get it clear. What kind of plastic do companies like Rapala use to inject into their molds?
Posted 08 February 2009 - 06:35 PM
I live with Thad. We go to school together and share the hobby of lure building. He is the one that showed me this site.
Posted 08 February 2009 - 06:37 PM
They use a high impact thermoplastic like polycarbonate or high impact acrylic. it comes in pellet form, its melted into a liquid state, then injected into metal molds to cool.
I'd venture to say Rapala does not do this in-house, they likely outsource that process to a supplier.
You can check the supplier directory here to find diving bills ready for purchase, or you can make your own:
Or some search results:
Tackleunderground - Search Forums
Edited by redg8r, 08 February 2009 - 06:41 PM.
Posted 08 February 2009 - 06:38 PM
Understood. Welcome aboard.
Posted 08 February 2009 - 06:50 PM
I remember coming across a company on the internet at one time that did this stuff but I can't find them now. They did the injecting for some bigger lure companies but have no idea what the site was now. It was American too.
Posted 08 February 2009 - 07:01 PM
Thanks for all the fast help. I'll take a look there.
Posted 08 February 2009 - 07:25 PM
Great link Jerry, I might have a closer look at those 'Rapala' like blanks. Thanks pete