Manufacturing Systems Inc.

  HELPING TO KEEP AMERICAN MANUFACTURING STRONG BY PROVIDING CREATIVE-COST EFFECTIVE AUTOMATION & MANUFACTURING SOLUTIONS

hydrostatic press cracking studies


The picture is a Hydrostatic Press for forming Ceramic "funnels".   The Boot and Mandrel, (the brown cone shape below the open breech which is shown towards the top) contained ceramic powder that was pressed into the solid "funnel" shape.   The boot itself was molded from Urethane and was approximately 1.5" thick.  The pressure could be as high as 30,000 psi but typically was only between 10,000 and 15,000 psi.  Cracking was a chronic problem since the pre-fired parts were relatively fragile.   The extremely high pressures made it difficult to analyze the nature of the cracking mechanism.  A series of tests were conducted to understand the interaction of the thick urethane "boot" and the green ceramic parts.  High speed images of the decompression curve were captured with a high pressure transducer.  The nature of the cracking mechanism was discovered and changes to the press was implemented to eliminate the cracking problem.







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