Screens
That looks impressive and your advice on tension is something I agree with...It is important to mention the fact that good rubber insulation on the support sections of the screen is imperative to screen life...I only say this as we currently use a similar arrangement on our coal screening facilities ■
Rubber Rail Covers
Gibbsy: Thankyou for your comments....quite correct.
The longitudinal support rails are CAPPED with a specifically profiled RUBBER CAP....with runs the length of the rails.
If the rubber is loose and allowed to roll off the edges....this in fact would allow steel to steel contact between the steel suport rail and the underside of the steel wirecloth section.
Just like a bobby pin........."If we bend it back and forth two three times...........it BREAKS. Same deal applies here.
The RUBBER RAIL should be a tapered fit pushing down onto the steel support rail to stay in place. Failing that.....we use steel MUFFLER CLAMPS to keep them on....or plastic ties.
Just keeping the rubber on .... saves you major dollars by extending the life of the wirecloth. No abuse = longer life.
.....................
I worked for a company that manufactured wirecloth and when I was called out to magically decide why a piece of wire screencloth had broken. ...... I just turned it over...and looked for the "Shiny areas of the underside of the wirecloth" and this would indicate steel to steel contact and rubbing...eventually causing breakage.
Hoping not to rub us the wrong way...........George Baker ■
Re: Picture Of Deck Camber
It is surprising what an influence that camber can have. Such small differences cause such large variations in the hold down force.
I have seen cross-tensioned polyurthane decks suffering from incorrect camber. The result was that they would split in the same spot every time.
One of the most interesting things I have seen is the motion of one of those decks in slow motion video. Nothing like you could imagine in normal viewing. ■
Deck Motion
Thanks for participating Peter ....much appreciated.
George B ■
Re: Picture Of Deck Camber
as an und user i have seen every possible way of screens falling apart . 85% of the time it could be prevented too. we now use the hammer method of checking tension ,it seems to work very well for us too. we take a 4lb. hammer and bounce it on the cloth if there is no bounce then it is not tight enough,,, good quality crown bar rubber is very cost effective too.... ■
Picture of deck camber
WIRECLOTH SHOULD BE DRUM HEAD TIGHT or it will break prematurely.
We need a proper camber to tighten the wirecloth over. This action breaks the back of the wirecloth and allows us to tighten the wirecloth to what we call DRUM HEAD TIGHT.
Saves you lots of money........ by having wirecloth last longer.
And lastly, and nobody ever does this.......it is recommended by manufacturers to RUN ONE SHIFT.....then take a quarter turn on the tensioning bolts holding the wirecloth in.....SNUG UP.
The reasoning is......wirecloth is WOVEN. after one shift the weave becomes a tad sleazy......a bit looser than originally installed. IF YOU SNUG UP....you tighten up...you last longer.
See you in the pits........ George Baker - Moderator
Attachments
camber deck wet lines bolt protectors (ZIP)
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