Shop upgrade helps with big Kydex

Joined
Apr 12, 2006
Messages
2,506
I daily peruse knife forums and YouTube looking for techniques and tooling that I can integrate into my own methods, as well as inspiration from all the amazing blade makers out there. I came across a video on YouTube a few months ago showing a T-shirt press being used to heat Kydex prior to molding. After a bit more research, I added it to my list of future shop upgrades. I've been using a toaster oven for small Kydex and an electric griddle for long Kydex. Both of them would end up with a usable sheath, but they were inconsistent in heating and I ruined more Kydex than I was happy with through scorching or melting since the toaster oven would fluctuate and the griddle would overheat in the middle.

A few weeks ago, a customer agreed to pay me for his bush sword and sheath before I started on the sheath (I usually only charge when everything is ready to ship) so that I could afford to buy my T-shirt press and use it to make his sheath.

Boy howdy, am I happy with the results! Much more even heating, and I can set the temperature higher without worrying about it melting from temperature fluctuations, so the Kydex molds better. And since I got the press with a 16" x 24" clamshell surface, I can very easily heat big pieces for making bush sword sheaths. Once the press is up to temp, it takes literally a minute to have the Kydex nice and noodley and ready to mold.

Here's the press. You can see the griddle sitting on the bottom shelf of the rolly cart.



So, the various blades that came back with me from the Gathering have all gotten sheaths since then and most have gone on to customers.

Here's the one that paid for the press, with a retention strap and shoulder sling. That's an 18" blade.



Another 18" blade.





Blades that widen toward the tip are particularly tricky to make sheaths for that have decent retention yet can still be easily withdrawn. I made these two for cleaver-type blades with open backs and retention straps. Credit to David Brown for the idea of the open-backed Kydex sheaths. It's one of his signature designs, but I talked with him and am doing them a bit differently.





Works great for small sheaths too.





So, definitely worth the money for the increased control and ease of working long pieces. I'm happy. :)
 
Last edited:
I use an old t-shirt press too. I really like that it keeps the kydex flat during heating.
 
This sound great, what contraption are you using to mold? Post up a video of it in action when you can.
 
Thanks, guys!

Kuntzi66 - For smaller stuff I have one of KnifeKits' Kydex presses. For the long stuff, I use this setup that I built:





It works pretty well, but I have plans for something with a scissor jack and an electric impact wrench to make it quicker. With Kydex, faster is better. That's down the road at some point.

Ggoose - If I remember right, this one goes up to 500 degrees. I set it for 330.

Kdogmcg - I use a heat gun to spot-heat and tweak when necessary, but it is less-than-ideal for heating up a long piece of Kydex to mold. I started out using that and could only heat up about six inches at a time. Then I moved to the toaster oven and griddle, which worked better but were inconsistent. The T-shirt press is worlds better, and I got it and an IR thermometer from Amazon for under $400. That will pay for itself in pretty short order.
 
Yeah I too have melted kydex on my griddle, I have just learned to really watch it close and not try to do other things while its heating up! I love seeing new techniques for kydex and that T-shirt press seems to be perfect!
 
james, you are becoming the master of retasking what with this new project, your various and sundry ovens/kilns, routers. etc. So are you gong to use this for kydex AND making some Helm Enterprises T-hirts to sell at your show table? :thumbup::D
 
Back
Top