Thread: Making Resin Grub Molds

Just a suggestion: put in the resin in layers, the first just enough to cover the model, to anchor it, and then add more as the first starts to set. Once the base layer has started to kick off, the model should be held in place. The mix has to be in small batches of course. More messing around and time consuming this way, but it should answer your problem. The layers of resin should bond to each without any problem.

That makes sense................thank you

This is kinda sorta what I tried.

Fiberglass Resin Mold
Updated November 26, 2011

Supplies
1) Bondo Fiberglass Resin (Buy at Wal-Mart or an auto parts store)
2) liquid Hardener
3) Permatex Gasket maker
4) Metal pan from the thrift store
5) Pyrex measuring cup

Technique
a) Place the worm in the pan and then cover it with water so you will know how much resin to use. This prevents waste. Pour the water into the measuring cup to measure it. This is how much Bondo fiberglass resin to use...

b) Put a small strip pf gasket maker on one side of plastic baits. Glue the lures on the bottom of the pan.

c) Mix the fiberglass resin and the hardener in an old pan. Mix hardener and resin according to directions on the can. Usually this is about. ¼ tsp hardener for every 6 tsp of resin

d) Pour resin mixture into the pan. Start on the side of the pan and just let it float over the grubs and worms.

e) As the resin cools it will shrink away from the sides. Let it harden about 20 hours on a flat surface while in the pan.

f) Remove your mold from the pan. Take the worms and grubs out of the cavity.


Melting Worms

1) Use a Pyrex measuring cup and an old microwave. Do not use the one in the kitchen. Go to the thrift store and get one you can use in the garage.

2) Wear safety equipment. Long sleeves, face shield or goggles and gloves. NEVER USE water around hot plastics. It causes an immediate reaction THAT WILL CAUSE SEVERE BURNS!

3) Cut up the same color worms in the Pyrex measuring cup. Place the Pyrex cup in the microwave on the high setting.

4) Check the cup about every 30 seconds. Use welding gloves to handle the cup as it gets very hot. You can stir the mixture with an aluminum stir stick. Melt it until it is like hot liquid syrup.

5) Spray Pam on the mold cavities or use a small brush to brush the cavity with vegetable oil. This prevents the worm from sticking after you pour it.

6) Pour the liquid hot plastic into the molds. Let them set for about five minutes then remove your bait and put them in a pan of cool water to complete the process and cool off.

7) When they are cool you can use a fine pair of scissors to trim the excess overflow from the lure.

If this keeps up, I may have to scrap this and learn about injection. I am on my third can of resin at about $11.50 a can. As I said, I am pretty bad at this so far.

ok Bob and G. You convinced my with this video. I am done trying to make a resin mold.That looks like one heck of a lot easier than what I am trying to do. Got to find me one on a 2 inch minnow, one for waxies and one for icicles and one for red wigglers. Shoot me a pm on where to look and what do I need as far as that injector.Let me know if you know of anyone that has used molds and injectors like that. I will purchase a few at a fair price. I can probably do that injection thing. All I saw before was kinda upside down injection and I was afraid I'd burn my fool self pretty dadgum bad if I tried that without knowing a hill of beans. Thanks for posting the video Injection Molding.wmv - YouTube
Last edited by shipahoy41; Today at 08:53 AM.

Originally Posted by shipahoy41

ok Bob and G. You convinced my with this video. I am done trying to make a resin mold.That looks like one heck of a lot easier than what I am trying to do. Got to find me one on a 2 inch minnow, one for waxies and one for icicles and one for red wigglers. Shoot me a pm on where to look and what do I need as far as that injector.Let me know if you know of anyone that has used molds and injectors like that. I will purchase a few at a fair price. I can probably do that injection thing. All I saw before was kinda upside down injection and I was afraid I'd burn my fool self pretty dadgum bad if I tried that without knowing a hill of beans. Thanks for posting the video Injection Molding.wmv - YouTube
Last edited by shipahoy41; Today at 08:53 AM.

PM sent we will answer all your questions ship.

Your gonna be on your way soon Ship.....I am watching and reading and learning from you.....when you get going pretty good then I might just give it a try myself.

Originally Posted by snake River

PM sent we will answer all your questions ship.

not fair!...I am lurkin on Ship too...LOL... please post on what you sent Ship in the PM on where to look...I want to jump right in on som BG style baby shad...love those things

Originally Posted by clock152

not fair!...I am lurkin on Ship too...LOL... please post on what you sent Ship in the PM on where to look...I want to jump right in on som BG style baby shad...love those things

I bought the hand injector. Stay tuned for updates.