Need to Know a Better Push Rod Than What is Shown.

You could probably tell what parts apply from the disassembled picture of the various parts above.

This is what the Sand Castle should look like.

I should probably check this page out (boat & ship manufacturing..Performance Panels--The Engineered Wood Association) It might be of help in understanding rotting of wood - in this case my work on sand castle using a wooden push rod.

This could become a chemist's "pandora's box. There are all types of wood and different types of wood preservatives.

What about a metal or rubber push rod? There again, one would have to research the metal or rubber. Who does this?

I wonder if these considerations should have been thought of 35 or so years ago when I first started "this great idea" which I have since learned has certainly outclassed me.

At least I think my drafting was pretty good then.

This computer age is "something else" I do not want to spend a cent on this project.

Here is a good one. (analogy between boats in ocean and sand castle push rod]:

A bit more research and a faster welding process, ships constructed of titanium could become a reality, according to the U.S. Office of Naval Research. Here, advantages abound. At 40% lighter than steel, a titanium ship hull may even be cost effective. In addition, the lightweight metal possesses temperature resistance and a low-magnetic signature, plus it's virtually resistant to corrosive seawater.

Learn more about titanium and titanium alloys…etc, etc.

I will try to elaborate some time latter. I am having trouble getting pictures from i-photo to desktop wherein I can use the dialog box.

I a m catching on to getting pictures from i-photo to desktop then open and submit.

Would this article be applicable? Stresses in Silos Dietmar Schulze 1. Introduction Knowledge of the stresses acting in silos is important for many applications: Silo design for strength (e.g. DIN 1055 part 6 [1]) Silo design for flow Loads on feeders and inserts Driving torque of feeders Design of silos in which a specific maximum stress is not exceeded (e.g. to avoid vibrations, particle attrition or extreme time consolidation) The calculation methods used by an engineer who is interested in avoiding flow problems and in feeder design differ from the calculation methods of a civil engineer (e.g. DIN 1055 part 6 [1]) who is interested in the stability of the silo structure. The civil engineer would choose the parameters for calculating silo stresses so that the major part of the load from the bulk solid is carried by the silo walls, whereas the engineer who has to calculate the feeder load and the required driving power would assume that the silo walls carry only a minor part of the load of the bulk solid. The stress distribution across the periphery of the silo is another example of the different points of view: whereas a strong irregular distribution of the stresses on the silo wall is quite unimportant for the design of a feeder, these different stresses cannot be neglected for the structural design of the silo walls. 2 Stress calculation See http://www.dietmar-schulze.de/spanne.html

What the picture shows is ridiculously flimsy.

Maybe try about a 1/2" diameter wood dowel.

Trying to work on dowels. I use Firefox, go back & forth with a computer helper. Not much luck. Just have to let things ride.(perhaps later)

Starting to investigate dowels.

From here I could saw off a proper amount of the wood slab and saw around the wooden peg to give me something to fit inside the mold. The plate would be touching the roof of the mold and the rod would go thru an opening in the center of the roof. I tried to dimension one, nailed into the peg and the center of the dimensioned outline of the slab. I sawed parallel along a line, taking off part of the slab and then started to try to connect the rod and slab with a screw which had been prepped by nail holes. Just as the screw was coming out of the slab the slab split. So that is why I show another approach. With patience I could probably saw tenderly along a prescribed outline of the desired square or circle which would surround the attached rod. This time there was no splitting at first because I was dealing with a larger segment of wood. I guess the crux of all this is that I need to have a better slab of wood and some practice.

What type of test for the use of wood rod and plate and what are the optimum dimensions of the plate & rod to push sand out of a sand mold? The same goes for a titanium rod and plate? Pictures could come later.

I know that a dy/dx type of "thing" might be the way to go. I remember when I took calculus I was impressed that a manufacturer could discover the correct dimensions of a tin can that could hold the most volume by using calculus which would use the least amount of tin. The diameter versus the height of the can. Rod and plate, pressure needed to push a known volume of sand - Oh well. Got to get going to do some shopping.

Perhaps the dy/dx for rod and plate would be: What thickness should the plate be to give the give the start of success of the screw attachment . The limits would be a very thin plate to a much thicker plate. What should be the diameter of the rod be? A small wire at the bottom of the intergal symbol to a more desirable dia. From zero to ?

The use of a straw and a piece of card board would probably work. Not very permanent though.

The same goes for wood or titanium.

There are so many simple sand molds, I am not sure this idea will ever get off the ground.

Please explain what it is that you are looking to accomplish.

Not sure.

Well Heidi. Judging from your previous posts, it's become obvious that you are interested in making the world a better place. Your love of animals is particularly awesome.

Please know that we will help in any way we can. You are also an artist. Quite often an artist doesn't know what the end result of their work will be. I've been there............................the art finds me.

While you may not know the end result of your latest endeavor, we will be glad to help you through any technical details. Hang in there.

Is this another part of the sandcastle project?

Yes.

Here is part of one of Lohr's letters to me - the one who developed my sand molds Engineering Models Parts Made To 0rder 1977
much. Therefore the last layers of sand should be drier to absorb the excess water that rises to the surface. When fully packed, Lhe top should not be wet. Now invert the fillad-mold on the ground and lift the mold as you hold the sand d.own by pressing on ttre plunger. Once the sand breaks free, the mold lifts easily. If the tower leans to one sj-de when the mold is removed, lt can easily be straightened at this time by just pushj-ng it back. With a little practice,
I believe that with the success of the tapered sides in conjunction with the plunger to force the sand out, that this wi1l be the best way to go. Especially since the taper wil-1 be required f or molding purposes -
I will keep you informed as f go along- I may have difficulty wlth the cone (No.3). I am not sure yet how I
will be able to do it.

Here is a part of one of the letters tha Lohr sent me (1977)W,J"/O Creative Design and Development Prototype and Engineering Models Parts Made To 0rder
much. Therefore the last layers of sand should be drier to absorb the excess water that rises to the surface. When fully packed, Lhe top should not be wet. Now invert the fillad-mold on the ground and lift the mold as you hold the sand d.own by pressing on ttre plunger. Once the sand breaks free, the mold lifts easily. If the tower leans to one sj-de when the mold is removed, lt can easily be straightened at this time by just pushj-ng it back. With a little practice,
I believe that with the success of the tapered sides in conjunction with the plunger to force the sand out, that this wi1l be the best way to go. Especially since the taper wil-1 be required f or molding purposes -
I will keep you informed as f go along- I may have difficulty wlth the cone (No.3). I am not sure yet how I
will be able to do it.
The enclosed agreement should be good. for our purposes, if not, feel free to add to or subtract from it as you see fit.
Sincerely yours, .,f^1,// *-k
Rile/ Lohr

I went to the lumber yard and bought the wooden rod and found the section of wood in scrap wood bin outside the store. Also bought a coping saw and some screws. Now I have to experiment if I ever get time. The rod could be cut to proper size and the plate could be shaped to either a circle or square.

Just add air compressor and filler rod, and some practice.

Not sure it's better than mechanical fasteners here.

Please answer the following questions.

Is the push rod what is either under or through the red thing?

How long is it?

What does it do?

Does it need to have a lot of strength?

How much do you have to spend to get what you want?

Why did you want some thing in the nature of expandable bolts?

Where in your project are you going to use the bolts?

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A Poet without words may as well be a Mime.

Thanks for showing interest. I have letters from Riley Lohr (Design & Development Models,} l977. Have other thoughts, etc. Not ready to answer your questions right now.

Riley Lohr did the molds based on my original drawing based on references from the library.

I will try to answer your questions soon.

OK. I spent many years designing tools. When I get enough information, I can usually come up with an answer.

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Gratitude is the basis for happiness. Get happy by being grateful for all that you receive.

I am working with our computer expert. I can insert information to him, but "don't hold your breath" I need to convey the problems and such which Riley Lohr encountered to him. Not sure where we would go from there.

My best bet now is to thoroughly` read the Cannon instructions on how scan and save the file, etc. It is quite a few pages long.

I hope I can contribute useful information.

Go around to some garage sales and pick up an old golf club and cut the shaft off to the correct length. You will now have a push rod that will act correctly and you will have a nice grip to get a hold on it.

Your flat push plate can be modified slightly so the push rod will stay centered on the push plate.

Have fun building sand castles.

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A hand without an arm is a useless tool

I wish I could delete this second message. I am having trouble "working within the system". I could add though that Riley Lohr had a devil of a time developing the models. It took him twice as long as he had anticipated.

You are building a cannon?

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