Today’s video is about the process I went through to make custom molded wheels using Polyurethane rubber. On Bloodsport, we used the exact same type of rubber that I’ll be experimenting with and the casting process we used is very similar to what I’ll show here. The main difference is that Bloodsport uses machined aluminum hubs which are quite expensive, and those wheels are much bigger than what I’ll be making. Here, I’ll be showing how I cast rubber tires onto lightweight 3D printed hubs you can make for a couple dollars apiece, and with a reusable custom 3D printed mold, have a wheel of exactly the size and hardness you’d like!

Links to Items in this video (Note: Amazon links are affiliate links)
Vytaflex 30: https://amzn.to/3dyF2EP
Vytaflex 40: https://amzn.to/2Jt0kIt
Smooth On Mold Release: https://amzn.to/34VK7mG
NEW RECOMMENDATION- Mica powder pigment: https://amzn.to/3GuZcfT
Vaseline/Petroleum Jelly: https://amzn.to/3pvKtrL

Sainsmart Carbon Fiber Nylon Filament: https://amzn.to/2WVM3XT
Gold PLA Filament: https://amzn.to/3mVann5

Epoxy Liquid Pigment Dye: no longer recommended as the Mica powder doesn't interfere with curing. As of late 2021 there is a massive global urethane supply shortage that has greatly impacted availability of these products. I added a link to Vytaflex 30A which I successfully used in competition since 40A was unavailable.

Just 'Cuz Robotics Website: https://justcuzrobotics.com/
Just 'Cuz Store: https://justcuzrobotics.com/shop

Instagram: @JustCuzRobotics
  / justcuzrobotics  
@bloodsport_battlebot
  / bloodsport_battlebot  

Bloodsport Facebook Page:
  / bnsrobotics  

0:00 Intro
0:40 Why Use Rubber
4:03 Molds and Hubs
5:42 Rubber Compound
7:09 Pour Walkthrough
8:35 Mold Release Application
10:15 Bloodsport Mold Design
12:27 Dyes
13:27 Attempt 1 - Mixing
14:40 Attempt 1 - Checkin
16:55 Division Hubs/Mold
17:27 Attempt 1 - Demold
18:17 Attempt 1 - Results
21:58 Lighter Draconid Hubs
22:27 Attempt 1 - Wheel Weight
24:39 Attempt 1- Inspection
25:14 Attempt 2 - Mixing
25:51 Attempt 2 - Demold
27:19 Attempt 2 - Problems
28:11 What Went Wrong?
28:35 Attempt 3- Mix
30:06 Attempt 3 - Checkin
31:36 Attempt 3 - Demold
33:46 Attempt 3 - Results
34:13 Proper vs Improper Cure
35:22 Outro

#CombatRobotics #Battlebots #Hobbyweight

Music provided by Argofox:

TheDiabolicalWaffle - Excalibur
   • TheDiabolicalWaffle - Excalibur [Argo...