Search found 280 matches

by SHIF
Fri Oct 24, 2008 10:19 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: best PSI to use
Replies: 14
Views: 7077

SHIF, Why do you do the temp ramp up and press for such a long time? Is this your formula, or did qcm suggest this? I am curious because some manufacturers use qcm and cook their boards for 12 minutes or less at 175. I am especially curious about the first half hour with no heat. I don't get the be...
by SHIF
Fri Oct 24, 2008 9:58 am
Forum: Ski/Snowboard Design and Layup
Topic: Edge Cnc Question
Replies: 8
Views: 4613

...then run the router over it to get a channel along the sidewall to compensate for edge... I’m not convinced the edge tabs cause major issues achieving a flat base. Just yesterday I used a Wintersteiger Micro 71 tuning machine to finish the bottoms of my latest ski build. Out of the press I detec...
by SHIF
Wed Oct 22, 2008 7:13 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: best PSI to use
Replies: 14
Views: 7077

...I'm using EVH 0043 and ECA 408... Exact same epoxy and curing agent that I use. Seems to have the longest pot life of any combo QCM offers. I transfered the corrosive curing agent into a one quart rectangular tin can having a screw-on cap. That stuff is really nasty and I don't like its original...
by SHIF
Wed Oct 22, 2008 9:34 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: best PSI to use
Replies: 14
Views: 7077

I have pressed several pairs of skis so far and experimented with bladder pressure and temperature parameters quite a bit. My lower press form is a heated aluminum sheet based on the construction described in the “articles” section of this great web site. My press frame is steel I-beams with a 88” l...
by SHIF
Tue Oct 07, 2008 4:01 pm
Forum: Ski/Snowboard Design and Layup
Topic: Expert forum: QCM epoxies (Questions answered!)
Replies: 32
Views: 67433

...I got some primer that's supposed to help bond this stuff to sidewall. Have any of you used this primer? Results? I'm going to do some comparison tests on small mockups Primer?? Do tell. What is this primer? I use QCM epoxy for my ski building, never heard of this primer. My skis have UHMW sidew...
by SHIF
Tue Oct 07, 2008 12:00 pm
Forum: Ski/Snowboard Design and Layup
Topic: rockered mold design
Replies: 7
Views: 4362

I think heated ski presses will yield much less spring-back in the finished ski. I get mine cooking at 190 degrees F and they exhibit very little spring-back. I think heating the core above 170 changes the properties of the wood fibers, releases their memory. That's what they told me at a local Wood...
by SHIF
Thu Aug 07, 2008 7:08 pm
Forum: Ski/Snowboard Design and Layup
Topic: above top sheet during press
Replies: 3
Views: 2310

I use a sheet of 1/8" thick Lexan (polycarbonate). Ski tops come out smooth as silk everytime.

-S
by SHIF
Thu May 15, 2008 9:29 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: How thick should sheet metal to cover the mold be?
Replies: 7
Views: 5444

Did you use the bladder to form the alum. sheet to the mold? No. I rolled the first sheet over the edge of my work table and worked it by hand into a curve at the tips. The second time I did not pre-bend it at all. I let the fasteners hold it against the bladder. In use, the air pressure presses it...
by SHIF
Wed May 14, 2008 9:49 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: How thick should sheet metal to cover the mold be?
Replies: 7
Views: 5444

.060" thick metal is what I used on my first press form. I screwed it down in five places along each edge, it was an inch wider overall than my heater. I made a second press form to achieve a different camber and tip curve profile and this time used .050" thick aluminum. Saved a few bucks ...
by SHIF
Thu May 08, 2008 12:12 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Orange Boards!
Replies: 4
Views: 4367

The fabric is an orange swirl design from Joann Fabrics. Looks OK but not as cool as most others. The QCM ECA-408 curing agent I used is very dark amber in color and makes everything look dark when pressed. http://www.qcminds.com/eca-408.htm The P-tex bases are also orange colored, from snowboardmat...
by SHIF
Wed May 07, 2008 7:43 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Orange Boards!
Replies: 4
Views: 4367

what rhymes with orange?

Ya, orange is cool. Nice work.

I made some orange sticks last Christmas.

Image

The cores are poplar and Brazillian redwood. This dark wood is way too heavy for this use. Never again. Only bamboo these daze.

-S
by SHIF
Wed Apr 09, 2008 8:15 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Profiling jig - Thanks Shif
Replies: 7
Views: 7407

This may be a silly question but are you guys using the planer to create the core thicknesses over the length of the skis/board? I.E. 7mm at center and 2mm at ends. Are the planers that auto adjust over lengths of material? Greg YES, the planer is used to create the basic tapers on each end of the ...
by SHIF
Sun Apr 06, 2008 9:49 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: does everyone use silicon on the angle iron clamps?
Replies: 7
Views: 5132

To cut a clean hole in the fire hose simply insert a piece of wood inside first and then use a round hole arch punch and hammer. The wood supports the material being cut and prevents cutting through the other side of the hose.

(McMaster-Carr catalog page 2262)
http://www.mcmaster.com/

-S
by SHIF
Sun Apr 06, 2008 3:36 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Profiling jig - Thanks Shif
Replies: 7
Views: 7407

I like how you are adjusting the height. I may use something like this in my jig. I attach my cores at the low end with an aluminum clamp bar to resist the cutting forces of the planer knives. This image shows a tapered end clamped down for tapering the other end of the core: http://www.fototime.com...
by SHIF
Sun Apr 06, 2008 3:13 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: does everyone use silicon on the angle iron clamps?
Replies: 7
Views: 5132

Is your tube rated for higher pressures? No glue is used in my bladder. I use a pair of 2 inch steel angle pieces with 1/4-28 grade 8 bolts and nuts every 2 inches to clamp the fire hose closed at each end. No worries at 60 psi although I settled on 35 psi as the optimum pressure for making skis. I ...