Papercreters: [papercreters] Re: Recent post about mixer safety

Wednesday, August 6, 2008

[papercreters] Re: Recent post about mixer safety

Here's a mixer safety link that contains more links to mixer saftey
stuff. It's a link bonanza!!!!

http://groups.yahoo.com/group/papercreters/message/2459

There's even a post from a nimrod buried in one of those threads
where that slurryguy idiot demonstrates his severe dain bramage! He
really should be locked up for everyone's safety.

--- In papercreters@yahoogroups.com, "Evelyn Vollmer"
<evelynanne8@...> wrote:
>
> because of this post I started to compile info about mixer safety
> through the database. It is a huge job. This is what I have come up
with
> so far. Please, if you have the time, add info to this subject for
our
> PC Manuel. Ev
>
> Mixer Safety
>
> Posted Fri May 4, 2007 by "slurryguy"
> Wear heavy boots.
> Why?
> Did you hear someone shout a shocked, angry, chagrined, outburst
last
> night? It was probably me! "%$%!@% WHAT THE HECK????"
>
> I was using the bucket method to work with some slurry last night. I
> had my drill spinning a blade in the bottom of a 5 gal bucket. The
> drill got going a little fast. I probably wasn't paying attention as
> carefully as I should have been. The blade sliced right through the
> side of the bucket, through the side of my heavy leather work boot,
> through my sock, and just nicked the skin of my foot. Nothing a
> little anteseptic and a bandaid wouldn't solve.
>
> There have been a few times I've performed that same procedure while
> wearing old running shoes. If I had been wearing those shoes, I'd
> likely be on crutches right now. I'll never wear anything but boots
> when working with papercrete from now on.
>
> I'm also going to dull the corners of my mixing blade a little to
> help keep it from slicing through a bucket like that again.
>
> I've inspected my buckets closely, 2 of them are very worn where the
> blade tends to scrape the side of the bucket. I grabbed a can of
> spray paint and put a big X on the side. No more mixing slurry in
> worn buckets for me.
>
> Think boots make you look goofy? Not having too healthy feet when
> you could have easily kept them healthy would look far far goofier.
>
> Please learn from my near miss.
>
> From: Pat B Parham <texasweldinginspector@>
> Subject: Blade safety
> To: papercreters@
> Date: Monday, July 7, 2008, 11:41 PM
> There has been several notes about blades coming through side of
buckets
> and this is the way I protected myself from this hazard, took very
> little time and less than $5. Remember safety does NOT cost money or
> time, but unsafe cost you and your loved ones. Instead of a big
drill I
> found a 1'' impact wrench on E-BAY and as this did not have a chuck
to
> hold my blade. I bought a 1/2'' floor flange and a 4"X1/2'' NIPPLE
at
> the hardware store, and then bolted flg. to center of bucket. Then
> welded blade 2'' up the mixer shaft, inserted 2'' of shaft into
nipple
> and now no matter what my mixer blade STAYS in the center of my
bucket.
> Worked on the 30 gal. drum I built also. Just make sure you turn
your
> shaft clockwise looking down and the nipple will never come out.
Also
> makes a handy holder, just release the switch and everything stays
put.
> I did put a 1/4'' wafer wood false bottom on to hold the bolts.
> http://ph.groups.yahoo.com/group/papercreters/spshow/bd68
>
> From: slurryguy <slurryguy@>
> Date: Saturday, July 12, 2008, 8:59 PM
>
> I think it is appropriate to point out that the welds holding those
> saw blades to the central mixing paddles are the only thing keeping
> the blades from flying off. Wouldn't that be a frightening
> experience?
>
> Since someone using a userid, "texasweldinginspector" is the one
that
> built and posted the one pictured, I have confidence that the welds
> holding those particular saw blades in place very strong welds
indeed.
>
> Contrast this with a typical lawn mower blade design, where the
blade
> itself is one piece and does not have any welds holding the blade
> itself together. An amateur with minimal mechanical experience can
> easily assemble that and achieve similar strength and quality as if
a
> professional mechanic assembled a straight blade design.
>
> I'm NOT saying that a lawn mower blade cannot fail. Of course it
> can. A metal fatigue failure could happen with either design though.
>
> I urge caution and care if someone wants to duplicate this saw blade
> design. Welding is a skill that takes time to perfect. Weak welds
> in such a design could be extremely dangerous. The faster the blade
> spins, the higher the stresses on the welds.
>
> If there is the slightest doubt in the quality of your welding, I
> suggest finding someone that can make the welds perfect.
>
> From: Pat B Parham
> â€œPlease take note of what slurryguy says but the main thing here
> is the use of the floor flange and nipple to keep my mixer shaft in
the
> center of my barrel. This is what I wish to demonstrate for
> everyone.â€
>
> Mon Jul 14, 2008 8:51 am
> Greg House ghunicycle@
>
> From: slurryguy <slurryguy@>
> >I think it is appropriate to point out that the welds holding those
> >saw blades to the central mixing paddles are the only thing keeping
> >the blades from flying off. Wouldn't that be a frightening
> >experience?<
>
> It wouldn't be too hard to do something like this without welds. You
> could use
> two circular saw blades bolted into a piece of all-thread with
eccentric
> bushings to hold them at an angle. Maybe take a 2" piece of pipe
and cut
> it at
> 20 degrees or so with a chop saw, use half on each side of the
blade.
> That way
> the circular saw blades don't need to be cut to be used. Maybe add a
> paddle type
> blade at the bottom to help circulate the material (create a
vortex).
>
> Greg
>