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Method for improving ceramic mold precision with vacuum freeze-drying technology
The invention discloses a method for improving ceramic mold precision with a vacuum freeze-drying technology, and relates to the technical field of precision casting. According to the invention, a water-based ceramic slurry containing solid-phase fiber is first prepared based on a gel injection molding technology; the water-based ceramic slurry is cast into a resin mold; when a ceramic mold blank is completely gel-solidified, the blank is placed into a vacuum freeze-drying machine and is subjected to pre-freezing; after a period of time, water in the ceramic mold blank is completely crystallized, vacuuming is carried out, and material temperature is controlled, such that water is directly sublimated from ice into vapor, and is pumped away. When the ceramic mold is thoroughly dried, compared to a ceramic mold blank without fiber, the ceramic mold provided by the invention has lower drying shrinkage, improved strength, and higher precision.
Method for improving ceramic mold precision with vacuum freeze-drying technology
The invention discloses a method for improving ceramic mold precision with a vacuum freeze-drying technology, and relates to the technical field of precision casting. According to the invention, a water-based ceramic slurry containing solid-phase fiber is first prepared based on a gel injection molding technology; the water-based ceramic slurry is cast into a resin mold; when a ceramic mold blank is completely gel-solidified, the blank is placed into a vacuum freeze-drying machine and is subjected to pre-freezing; after a period of time, water in the ceramic mold blank is completely crystallized, vacuuming is carried out, and material temperature is controlled, such that water is directly sublimated from ice into vapor, and is pumped away. When the ceramic mold is thoroughly dried, compared to a ceramic mold blank without fiber, the ceramic mold provided by the invention has lower drying shrinkage, improved strength, and higher precision.
Method for improving ceramic mold precision with vacuum freeze-drying technology
LI DICHEN (author) / LU ZHONGLIANG (author) / JI ZHE (author) / MIAO KAI (author) / TIAN GUOQIANG (author)
2015-04-22
Patent
Electronic Resource
English
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