US2003099565A1PendingUtilityA1

Method for removing waxes from molded part in powder injection molding by using mixed fluid

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Assignee: KOREA INST SCI & TECHPriority: Oct 12, 2001Filed: Oct 9, 2002Published: May 29, 2003
Est. expiryOct 12, 2021(expired)· nominal 20-yr term from priority
Inventors:Jong-Sung LimYoun-Woo LeeJae Duck KimYong Ho Kim
B22F 2999/00B22F 3/225C04B 2235/3847C04B 35/634C04B 35/63408C04B 35/632B22F 3/1025C04B 35/63C04B 2235/6022C04B 2235/405C04B 2235/5436C04B 35/638B22F 2998/00B22F 3/04
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Claims

Abstract

In a method for removing a wax material from a molded part, to remove a major binder, waxes, from a molded part fabricated by a powder injection molding method or a compression molding method, a supercritical mixed fluid of carbon dioxide and propane is used as a dewaxing solvent.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A dewaxing method for removing was material of a binder from a molded part fabricated by a powder injection molding method or a compression molding method, wherein a supercritical mixed fluid of carbon dioxide and propane is used as a dewaxing solvent.  
     
     
         2 . The method of  claim 1 , wherein the ratio of carbon dioxide to propane (carbon dioxide wt. %: propane wt. %) in the supercritical mixed fluid is 95 wt. %:5 wt. %˜15 wt. %:85 wt. %.  
     
     
         3 . The method of  claim 1 , wherein a dewaxing temperature is in the range of 32.9˜86.4° C.  
     
     
         4 . The method of  claim 1 , wherein a dewaxing pressure is in the range of 100˜500 bar.

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