Composite hockey stick repair


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Laroo
Laroo
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I am new to the composite repair process but have been playing around with different products and repairs.

My present situation is that I have been trying to repair a composite hockey stick that has broken in the shaft. I have tried a couple of techniques with both being unsuccessful. I have tried the repair from the inside using a carbon fiber sleeve and resin. It holds up but definetly not strong enough for a game of hockey and eventually breaks where the repair was done.

I have also tried on the outside, which lasted longer, but it eventually broke where the repair occurred. I believe I am either using the wrong type of sleeve or I a missing something in trying to do the repair.

If someone has some expertise or suggestions of what to use it would be greatly appreciated. I know it can be done.

Thanks for your help

Laroo
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Hatvan Kilenc
Hatvan Kilenc
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I have also tried to repair ice hockey sticks. I attached two parts of the shaft with approx. 5 cm long piece of plastic and glued it with epoxy inside the shaft just to keep it nice and straight. After that i sanded the shaft 20 cm to both directions from the breaking point so that i could see the plain carbon. Then i wrapded one layer of CF and fixed it with electic tape, i also made few "holes" to the tape wrap with needle so that excess epoxy could run out. Wrap dried in a sauna + 30 degrees 10 hours, and actually it looked quite nice after that. Light sanding and another layer of CF, againg light sanding, some putty and sanding, finally some black paint and the stick was ready.  It looked very nice and was stiff, stiffer than the original stick was. I gave it to my friend (former pro player) for a try, and he snaped it into two pieces right away. Another stick i repaired in a same way lasted 1 hour of playing till it snaped also. The CF i used was 200 g plain weave http://www.biltema.fi/fi/Veneily/Kemikaalit/Lasi--ja-hiilikuitu/Hiilikuitukangas-30514/ 

So, lessons learned and conclusion is that 2 layers ain't enough in the breaking point. Now i want your opinion regarding my next attempt. I definitely need more layers and also have to think how to use different kind of fabrics. So, my plan is following: 1 layer of UD lenghtwise in to the breaking point (5 cm), layer of carbon aramid (6 cm), layer of UD across (7 cm). This should be enough for the breaking point? Then i will proceed with longer (15-20 cm to both directions) layers along the shaft, maybe 1 UD layer, 1 carbon aramid layer and finally CF sleeve. The challenge is to have some flexibility in the shaft, i don't want it to be like iron bar. Maybe the long UD layers will make it too stiff? Should i use something else instead of UD? How does it sound? Good plan or total disaster? Any hints and tips?
GO

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