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bondedhawk Profile
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Sidekick

Registered: 11-2008
Posts: 398
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Casting a Rang


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I want to make some semi flexible batarangs, like toy knives that I had as a kid. What should I use to cast this in?

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2/24/2017, 1:39 pm Link to this post Send Email to bondedhawk   Send PM to bondedhawk
 
efarrell4 Profile
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Head Administrator

Registered: 02-2004
Posts: 7267
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Re: Casting a Rang


I suggest a 60 shore urethane. Here are a few:
https://www.polytek.com/products/poly-75-60-liquid-rubber

https://www.smooth-on.com/products/vytaflex-60/

Also noted in this tread, I always liked BJB F60 (but unfortunately I heard it was discontinued or replaced with another number. I haven't ordered it in a while. (I can check with my distributer)
http://bbrotherhoodofthebat.runboard.com/t223834

You'll also need to get some tint (to color the things).



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2/24/2017, 6:49 pm Link to this post  
 
bondedhawk Profile
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Sidekick

Registered: 11-2008
Posts: 398
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Re: Casting a Rang


Thank you sir. I know there are several options out there cor rangs, but I wanted something safe around kids but sturdier than foamies.

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2/25/2017, 1:14 am Link to this post Send Email to bondedhawk   Send PM to bondedhawk
 
efarrell4 Profile
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Registered: 02-2004
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Re: Casting a Rang


Then Urethane is definitely the way to go. I've made bunches of urethane over the years. I like to keep a few around the "cave" in case anyone comes by with kids (or has kids). I hand 'em out like water. :wink

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2/25/2017, 11:13 am Link to this post  
 
bondedhawk Profile
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Sidekick

Registered: 11-2008
Posts: 398
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Re: Casting a Rang


Thanks. I've been wanting to try my hand at this for awhile. Unfortunately life keeps getting in the way. I'm in a high humidity area, Texas coast, will this be a problem? I plan to work in a shed with no AC.

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2/25/2017, 12:29 pm Link to this post Send Email to bondedhawk   Send PM to bondedhawk
 
efarrell4 Profile
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Registered: 02-2004
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Re: Casting a Rang


I've had humidity be a problem with resin in the past but so far never with urethane rubber. I would say maybe run a fan to keep the air moving, that usually lowers the humidity a little. Other than that I would check with the supplier and see if they suggest adding anything else in to prevent problems. I did need to do that with resin once. Resin is usually urethane based as well just it gets harder than urethane rubber.

Good question.

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2/26/2017, 12:58 pm Link to this post  
 
bondedhawk Profile
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Sidekick

Registered: 11-2008
Posts: 398
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Re: Casting a Rang


I appreciate the help. Will probably order the next check. Still need to do a little more homework first

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2/26/2017, 11:10 pm Link to this post Send Email to bondedhawk   Send PM to bondedhawk
 


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