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Lost-wax casting process

A manufacturing method and technology of modeling coatings, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve problems such as high cost

Active Publication Date: 2007-01-17
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material (even if only slightly radioactive) requires the construction of a waste disposal process which is demanding, industrial and costly

Method used

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Examples

Experimental program
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Embodiment Construction

[0029] The method of the present invention is described in more detail below.

[0030] The method for making a shell mold common to all types of parts comprises a first step of making a master mold out of wax or another similar material known in the art, most commonly wax. Depending on the type of part in question, multiple masters can be grouped together to make multiple molds simultaneously. The size and shape of the master tool is the same size and shape as the final part, taking into account the shrinkage of the alloy.

[0031] The manufacturing steps of the shell are preferably carried out by a robot whose actions are common to all types of components and whose control program optimizes the quality of the deposition and makes the blades and shrouds of different geometries non-cracking.

[0032] Simultaneously with the preparation of the individual styling coatings, the master or sets of masters are successively impregnated to deposit the ceramic material.

[0033] The f...

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PUM

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Abstract

A dewax casting technology for preparing a multi-layer ceramic shell mould including a mother mould of wax or its similar material, a contact layer, an intermediate layer and multiple reinforcing layers includes such steps as dipping in the first modeling paint containing ceramic particles and adhesive, depositing sand, drying to form said contact layer, dipping in the second modeling paint, depositing sand, drying to form said intermediate layer, dipping in the third modeling paint, depositing sand, drying to form a reinforcing layer, and repeating the steps for preparing reinforcing layer until the thickness of shell mould is qualified.

Description

technical field [0001] The invention involves making components, such as metal blades and shrouds, with complex geometries using a technique known as lost-wax casting. Background technique [0002] In the manufacture of turbojet engine blades and shrouds, such as rotor or stator components or structural components, using lost wax casting techniques, wax or similar materials that are easily disposed of in subsequent processes are used to form master patterns. Multiple masters can be grouped together if necessary. The master is dipped in a first modeling paint to form a first layer of material in contact with the surface of the master around which a ceramic mold is produced. The surface of this first layer is sandblasted for easier bonding to the subsequent layers, followed by drying (including the application of stucco and drying operations) in its entirety. The dipping operation is then repeated on the styling paint, which may differ in composition, each dip being followed...

Claims

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Application Information

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IPC IPC(8): B22C9/04
Inventor A·比拉本C·马蒂P·拉戈J·－C·霍森F·特拉尔P·舍瓦利耶P·卡莱罗J·－P·理查得I·瓦伦特
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A