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A rapid preparation method of calcium oxide-based ceramic casting mold for complex parts manufacturing

A ceramic casting, calcium oxide-based technology, used in ceramic molding machines, manufacturing tools, etc., can solve the manufacturing needs of difficult and complex structural parts, shorten the design and manufacturing cycle, reduce manufacturing costs, and improve density and sintering performance. Effect

Active Publication Date: 2019-01-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few studies on calcium oxide-based ceramic casting molds, and the forming method mainly adopts compression molding. The forming process is mainly to mix calcium oxide powder with plasticizers such as oleic acid or paraffin, inject it into a steel mold, and then press molding. The method is suitable for the manufacture of parts with simple structures, but it is difficult to meet the manufacturing needs of parts with complex structures.

Method used

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  • A rapid preparation method of calcium oxide-based ceramic casting mold for complex parts manufacturing
  • A rapid preparation method of calcium oxide-based ceramic casting mold for complex parts manufacturing
  • A rapid preparation method of calcium oxide-based ceramic casting mold for complex parts manufacturing

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preparation example Construction

[0040] see figure 1 The present invention discloses a method for rapidly preparing calcium oxide-based ceramic molds suitable for the manufacture of complex parts, comprising the following steps:

[0041] 1) Use a light-curing rapid prototyping machine to manufacture burnable light-curable resin molds;

[0042] 2) Using a gel injection molding method, uniformly mix ceramic powder, monomer, crosslinking agent, dispersant, plasticizer and deionized water to prepare a high-solid, low-viscosity ceramic slurry;

[0043] 3) Pour the ceramic slurry into the cavity of the resin mold under vacuum and vibration environment, and under the induction of catalyst and initiator, the ceramic slurry is solidified to obtain the ceramic casting mold green body; the ceramic casting mold is removed by vacuum freeze-drying method. Moisture in the green body; put the dried ceramic casting green body into the atmospheric degreasing furnace to degrease, and burn off the organic matter in the green bo...

Embodiment 1

[0047] 1. Manufacture of burnable photocurable resin molds

[0048] The burnable resin mold contains a complex inner cavity and shape structure, and at least can form an integrated cooling channel. The specific manufacturing process is: first, use UG and other 3D modeling software to design an integral mold model of a certain type of blade of an airline ,Such as figure 2As shown, 1 is the SL resin mold shell; 2 is the ceramic slurry gate; export the model data as an STL format file, then use Magics software to add necessary supports to the model, and obtain the final SLC format file after layering processing, Then import the file into the light-curing rapid prototyping machine (XJRP-SPS600B), and scan the liquid photosensitive resin DSM Somos14120 under the drive of the laser head mechanical arm. The scanning path is controlled by the graphic data of each layer. Layers of liquid resin (about 0.1mm) are solidified due to polymerization and reaction, and continue until all lay...

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Abstract

The invention discloses a fast preparation method of a calcium oxide based ceramic casting mold for manufacturing complex parts, and belongs to the fast precise casting field. The method comprises the following steps: manufacturing a ceramic casting mold biscuit by adopting calcium carbonate powder and moderate mineralizing agent as raw materials, degreasing the biscuit, placing in a vacuum sintering furnace together with moderate metallic calcium to perform the reaction sintering, and then placing the casting mold in an atmosphere sintering furnace to finally sinter. The metallic calcium simple substance is reacted with carbon dioxide produced by decomposing calcium carbonate to produce calcium oxide so as to improve the compactness of the ceramic casting mold. The moderate mineralizing agent is used for promoting the sintering of the ceramic casting mold, and the hydration resistance of the ceramic casting mold is improved. The calcium oxide based integral ceramic casting mold prepared through above method has excellent high-temperature comprehensive performance, solves the technical problem that the aluminum oxide based ceramic casting mold is hard for core removal and high in rejection index, and is especially suitable for the fast manufacturing of complex parts.

Description

technical field [0001] The invention belongs to the field of rapid precision casting, and in particular relates to a rapid preparation method of a calcium oxide-based ceramic mold used for manufacturing complex parts. Background technique [0002] At present, there are mainly two types of ceramic molds for near-net shape precision casting widely used at home and abroad: silica-based and alumina-based. The use temperature of silicon oxide-based ceramics is 1520°C to 1560°C. Under the pouring conditions of 1500°C to 1550°C, the yield is high, but when the use temperature is higher than 1550°C, the high-temperature performance is extremely poor, so silicon oxide-based ceramics are not suitable. High-temperature alloy casting conditions at higher temperatures; alumina-based ceramics have the advantages of high refractoriness, good chemical stability, good thermal stability, good creep resistance, no crystal transformation, etc., and its service temperature is greater than 1550 °...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/057C04B35/64B28B1/08B28B1/087
CPCB28B1/082B28B1/0873C04B35/057C04B35/64C04B2235/6023
Inventor 李涤尘鲁中良黄福享杨强张航
Owner XI AN JIAOTONG UNIV
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