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Direct light-curing fabrication method of hollow blade ceramic cast

A technology of ceramic molds and hollow blades, which is applied in the field of precision casting, can solve the problems of increasing the production cost of parts, positioning errors, and large costs, and achieve the effects of ensuring mutual position accuracy, reducing manufacturing costs, and simplifying the manufacturing process

Active Publication Date: 2008-11-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the positioning error and assembly error in the process of assembling the ceramic core to the wax mold, and the poor stability at the same time, as well as the time-consuming, cumbersome process and high cost of subsequent wax injection, coating, sanding, and dewaxing processes, it directly affects The manufacturing cycle and cost of the ceramic shell affect the final casting manufacturing cycle, cost and production efficiency
At present, using the traditional production method, the yield of the blade is only 10%. Such a low yield greatly increases the production cost of the parts and reduces the production efficiency.

Method used

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  • Direct light-curing fabrication method of hollow blade ceramic cast
  • Direct light-curing fabrication method of hollow blade ceramic cast

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 800g of silica sol, 200g of glycerin, mix them to dissolve each other, add 240g of acrylamide and 10g of N-N'methylenebisacrylamide to the above solution, and dissolve them completely to obtain a transparent premix.

[0035] In the above premix, add 8 μm silicon oxide powder 2120g and 1.8 μm silicon oxide powder 530g (mass fraction is 70%), dispersant sodium polyacrylate 8ml (0.3% of ceramic powder mass), after adding the above powder each time Ball milled for 3 hours, finally added 8ml (0.8% of the premixed liquid quality) photoinitiator 1173 (2-hydroxyl-methylphenylpropane-1-one), ball milled for 1 hour, the photoinitiator was fully mixed with the slurry, A uniformly dispersed ceramic slurry is obtained.

[0036] Add the ceramic slurry into the resin tank of the light-curing molding machine (SPS450B, manufactured by Shaanxi Hengtong Intelligent Machine Co., Ltd.); use the 3D solid modeling software PRO / E to process the 3D model of the blade to obtain the 3D soli...

Embodiment 2

[0040] Weigh 875g of silica sol, add 356.25g of acrylamide and 18.75g of N-N'methylenebisacrylamide into the silica sol, and dissolve them completely to obtain a transparent premix.

[0041] In the above premix, add 8 μm silicon oxide powder 794.5g and 1.8 μm silicon oxide powder 340.5g (mass fraction is 47.5%), dispersant sodium polyacrylate 8ml (0.7% of ceramic powder mass), add powder each time After ball milling for 3 hours, finally add 12ml (1.2% of the mass of the premix) photoinitiator 1173 (2-hydroxyl-methylphenylpropan-1-one), ball milling for 1 hour, so that the photoinitiator and the slurry are fully mixed , to obtain a uniformly dispersed ceramic slurry.

[0042] Add the ceramic slurry into the resin tank of the light-curing molding machine (SPS450B, manufactured by Shaanxi Hengtong Intelligent Machine Co., Ltd.); use the 3D solid modeling software PRO / E to process the 3D model of the blade to obtain the 3D solid model of the blade casting mold ; Import the three-...

Embodiment 3

[0046] Weigh 525g of deionized water and 225g of glycerin, mix them to dissolve each other, add 450g of acrylamide and 50g of N-N'methylenebisacrylamide into the above solution, and dissolve them completely to obtain a transparent premix.

[0047] In the above-mentioned premixed liquid, add 5 μ m silicon oxide powder 1766g (mass fraction is 58.5%) successively, dispersant ammonium polyacrylate 9ml (being 0.5% of ceramic powder mass), ball mill 3 hours after adding powder each time, finally add 18ml ( The photoinitiator 1173 (2-hydroxy-methylphenylpropane-1-one), which is 1.8% of the mass of the premix solution, was ball milled for 1 hour to fully mix the photoinitiator and the slurry to obtain a uniformly dispersed ceramic slurry.

[0048] Add the ceramic slurry into the resin tank of the light-curing molding machine (SPS450B, manufactured by Shaanxi Hengtong Intelligent Machine Co., Ltd.); use the 3D solid modeling software PRO / E to process the 3D model of the blade to obtain ...

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Abstract

The invention relates to a method for directly making a hollow blade ceramic mold based on a photo-curing process. The method is as follows: firstly, ceramic powder and pre-mix liquid are evenly mixed so as to make ceramic slurry; secondly, according to a hollow blade model, a hollow blade mold model containing a gating system is obtained, and the ceramic slurry is directly made into a ceramic mold biscuit on a photo-curing forming machine according to the hollow blade mold model; then, the ceramic mold biscuit is dewatered to obtain a dry ceramic mold; finally, the dry ceramic mold is placed in a high-temperature baking furnace so as to carry out degreasing and sintering, thereby making the hollow blade ceramic mold. The ceramic mold can be used in the casting of a hollow blade, and replaces a multi-layer ceramic shell and core manufacturing process adopted in the prior investment casting. The method does not need the processes of investment pattern making, slurry coating and sand spreading adopted in the prior process, and has the characteristics of simple process, short cycle, low cost and quick returns, etc.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a method for directly manufacturing hollow blade ceramic molds through light curing, mainly including the preparation of ceramic slurry, the generation of three-dimensional models of hollow blade molds, and the light curing of ceramic mold blanks for hollow blades Shaping, drying of ceramic casting green bodies and degreasing and sintering processes of ceramic casting molds. Background technique [0002] With the development of industry, energy problems have become increasingly prominent, and improving energy utilization efficiency has become the only way for industrial development. Industrial gas turbine is one of the most efficient and clean energy power systems at present, but its manufacturing technology is extremely complicated, and the blade manufacturing technology is one of the key technologies of gas turbine. During the working process of the gas turbine, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622
Inventor 李涤尘周伟召吴海华陈张伟卢秉恒
Owner XI AN JIAOTONG UNIV
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