Rubber Compression Molding

Nothing has changed since the last two times you tried to get someone to give you information that would be readily available from the raw material supplier.

I thought you had an 800 ton press. That should do it. And, as I said before, you need enough clamping force to close the mold and that's all. You could apply a million tons per square inch and it wouldn't make any difference in the finished part.

ASTM D4703 - 10a Standard Practice for Compression Molding ...

Thanks for your kind consideration.The following data's will provide information about the problem I am facing.

We have a hydraulic press of 325 ton capacity,max applied pressure=100 kg/sq.cm

(Ram radius=160 mm,4 nos.).platen size=1200x2200 mm

We are planning to mold wall guard of size 200x2000x25 mm thick-5 cavity in a mold of size 1150x2000 mm.

ie. mould area=1150x2000=23,000 sq.cm

cavity area=5(200x2000)=20,000 sq.cm

Whether we have to consider mold area or cavity area?

If cavity area:at max,100 pressure sp.pressure=325000/20000=16.25 kg/sq.cm

Is this sp.pressure enough to mold this object?or do we have to reduce the cavity no?

Can anybody please help?