Cope and drag
Cope and drag
(OP)
Hi everyone
I need to decrease the amount of sand which we used in cope and drag as much as possible. Any idea how can I calculate minimun height of needed cope and drag for a cast? ( specially for drag; in which motlten metal doesnt penetrate out of buttom of the drag)
I need to decrease the amount of sand which we used in cope and drag as much as possible. Any idea how can I calculate minimun height of needed cope and drag for a cast? ( specially for drag; in which motlten metal doesnt penetrate out of buttom of the drag)





RE: Cope and drag
You will be making the molds weaker if you reduce the thickness.
Are these supported in frames?
What metal are you pouring, what is the mold size, what is the casting size.
Give us a clue.
We used to pour some long narrow parts, we oriented them diagonally in the mold (couldn't fit 2) and put large hollow plugs in teh opposite corners.
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P.E. Metallurgy, Plymouth Tube
RE: Cope and drag
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: Cope and drag
My apology.
We are talking about a jaw crusher with about 8 cm thichness and several lenght like 110*90 or 60*80 or etc. And with part line in midle
It is usualy cast with magnesium steel or carbon steel .
We are using silica sand with resin and co2. And use chromite sand in sensetive parts.
We have a lot of cop and drags made of steels with several size and we need to make sure what is the minimum size we need to reduce consume of sand( along with safty of course!)
RE: Cope and drag
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: Cope and drag
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P.E. Metallurgy, Plymouth Tube
RE: Cope and drag
@EdStainless: what is your suggested thickness from last part of the model to the ground in drag?
RE: Cope and drag
I like a couple of inches of good solid sand on the bottoms and sides of a mold.
The top can be a bit thinner than that.
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P.E. Metallurgy, Plymouth Tube