◆ Soft plastic
Craw lure mold, 3 inch
Six 3 inch craws per pour, a ringed tail, a carapace and two flat claws that float up. A silicone lure mold.
◆ Soft plastic
Six 3 inch craws per pour, a ringed tail, a carapace and two flat claws that float up. A silicone lure mold.
A hand-pour mold for six soft plastic crawfish, about 80 mm from tail fan to claw tips and 52 mm across the claws: a fan tail, a ringed abdomen, a smooth carapace, two thin arms and two big flat claws, each split into a pincer, that float up and flap when the craw rests on the bottom. Each set of three takes about 12 ml of plastisol.
Made with our tray mold generator in its flexible silicone tray mode: print the caster, pour a heat-rated mold silicone into it and peel out a six-cavity lure mold. Plastisol goes in at 160 to 180 C, which no printed mold survives, and the silicone lets the claws peel out without tearing.
The craws are open-pour and flat-backed, as every hand-pour mold makes them. Texas rig one on a 3/0 hook, drag it on a football jig, or trim it as a jig trailer. The zip carries the printed caster exactly as the tool exported it, one set of three craws as an STL, the master uploaded to the tool, and a print and pour sheet with the silicone figure the tool measured.
Shown as a 3D render of the printed caster with the silicone mold it makes and red soft plastic craws in front, not a photo.
Print the caster as exported, open side up, no supports. It only ever holds silicone, never hot plastisol: PLA softens at about 60 C.
Mix 369 ml of a mold silicone rated for 200 C (400 F) or more (most tin- and platinum-cure mold silicones are, check the datasheet) and pour it into one corner of the caster in a thin stream until it covers the shapes to the rim. Tap out the bubbles and let it cure for as long as its datasheet says.
Peel the cured silicone out of the caster. That silicone is your lure mold: lay it flat on a heat-proof board.
Heat soft plastisol in a microwave you keep for plastisol only, in 30 to 60 second bursts, stirring between them, until it is clear and runny at 160 to 180 C (320 to 350 F). Stir in colour, glitter or salt now. Work with a window open or under an extractor and wear gloves: hot plastisol burns, and it smokes if it goes past 190 C.
Pour each craw from the pour cup in one steady stream, starting at the tips of the claws, which cools first, and fill each cavity slightly over the rim. Never pour lead or any metal into this mold.
Let the mold cool for 5 to 10 minutes, then peel each craw out, the thin end first. Trim any flash off the flat back with scissors, and keep the mold for plastisol only.
Print details
| Cast material | Soft plastic |
|---|---|
| Printed parts | 1 |
| Size (W x D x H) | 176 x 173 x 20 mm |
| Print bed needed | 177 x 173 mm, 20 mm tall |
| Filament | ~81 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Download | ZIP: printed caster (STL) + one set of three craws (STL) + tool master (STL) + print and pour sheet |
| Added | 2026-09-28 |
Made with the free Tray mold generator. Upload your own model and get the same kind of mold built around it, in your browser.
Free, no account needed. Opens Thingiverse in a new tab.
Free for personal use. Selling the pieces you cast needs a commercial licence (Pro or Founder); passing on the file itself is not permitted on any plan. Full terms.
New to casting? Read the ice cube tray mold guide.
Texas rigged on a 3/0 offset hook with a bullet weight, hooked in from the tail so the claws trail, it goes through weeds and rock. On a football or swim jig it makes a craw jig; cut the tail off short to use it as a trailer.
Pour the claws and arms first in one colour, orange or chartreuse, and fill the body straight after with the main colour while the claws are still hot, so the two fuse. Red, brown and green pumpkin bodies with orange claws copy real crayfish.
The claws are thin so they float, which means they cool first. Pour them before the body, with the plastisol hot, and slightly overfill each cavity so the flat back comes out whole. Scrape the excess off with a putty knife once it has set.
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