Search found 12 matches

by propellanttech
Thu Feb 02, 2012 10:07 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: dp contactor
Replies: 5
Views: 3227

Re: dp contactor

Hi there, I am not so good at electic devices... I would like to know if the dp contactor works for my heat blanet. http://www.auberins.com/index.php?main_page=product_info&cPath=2_31&products_id=164&zenid=103f294e187c278b46e56017f5659524 19" x 85" 220v (monophase) 3500w 14.58...
by propellanttech
Sun Jan 29, 2012 9:29 am
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

I'll just throw out some of my experience working with polycarbonate (PC). For my job we had an application where we had to bond several different types of materials to the PC. We tried several types of plastics and foils. Not much would work well to get a durable bond. We tried UV curable adhesive...
by propellanttech
Sat Jan 28, 2012 6:46 pm
Forum: Ski/Snowboard Design and Layup
Topic: is Too much Preasure Possible
Replies: 57
Views: 23479

It's all in your head r u during it right or wrong? Think it through know your results to date if there is something you don't like change it up solve your problems build great products enjoy them it's about the fun it's about the build, the design and accomplishment what resin you use o your syste...
by propellanttech
Sat Jan 28, 2012 6:00 pm
Forum: Commercial postings
Topic: These guys are great for all supplies:
Replies: 4
Views: 5660

Tried to call them the other day, but no one answered.

James
by propellanttech
Sat Jan 28, 2012 4:50 pm
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

Yeah will certainly be interesting so go for it! But I'm not sure you need to worry about having a bulletproof board, what kind of scary mountain do you ride at? Doesn't seem to common that cores are the weak part of a ski/board (I say that, while I just had a core failure on a ski... :oops: But th...
by propellanttech
Sat Jan 28, 2012 3:13 pm
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

Sounds like some testing is in order. I say lay up some material and run some tests. It may bond ok but wonder how well it stays bonded after repeated flexing and twisting. Also put your sample in a freezer or outside on a cold day, then flex. See if it becomes brittle or delams. I guess that is al...
by propellanttech
Sat Jan 28, 2012 2:16 pm
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

figure 8-10 lbs per pair of finished skis depending on your core choice and composite and epoxy and pressing. an acrylic core would also be very brittle, i would think. Im sure its elongation at break is significantly less than say ash. I'm working with a snow board, but I understand your reference...
by propellanttech
Sat Jan 28, 2012 10:29 am
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

jvangelder wrote:It does sound very heavy, i belive my complete boards weight less than that
If you or someone else has a core, a weight would be nice for comparison.

James
by propellanttech
Sat Jan 28, 2012 7:11 am
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

Just as a follow up:

I did some calculations, and the core would weigh: 5.66 lbs

I'm not sure, but that sounds very heavy for a core. I didn't calculate in the holes for the inserts, but the weight saved there wouldn't be much.

James L
by propellanttech
Fri Jan 27, 2012 10:17 pm
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

Well I've certainly never heard of anybody doing it, you'll probably have to do a few test pieces to figure out the stiffness, thickness, and weight. Seems like it would be incredibly heavy? Yes, I do plan on testing, if I can overcome the lamination issues. It probably will be heavier than a stand...
by propellanttech
Fri Jan 27, 2012 6:07 pm
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

Welcome! About half of the folks on here build boards, don't worry it's not just ski building! What is the reason you want to use polycarbonate?? Are you talking about the clear stuff that is heat mold able? Because good luck bonding that to anything. I've used it as a mold surface before (non ski ...
by propellanttech
Fri Jan 27, 2012 3:49 pm
Forum: Materials and Supplies
Topic: New Here and have a question about a core material.
Replies: 17
Views: 9208

New Here and have a question about a core material.

I'm new around the forums, and I have a question. I'm not going to build skis, but I am looking to build some snowboards. I would like opinions on using polycarbonate for a core. How can delamination be prevented? I know the core will need some kind of longitudinal stringers to take out some flex. A...