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Lost-wax casting process with contact layer

A technology of contact layer and manufacturing method, applied in the direction of casting molding equipment, mold, mold composition, etc., can solve problems such as surface defects

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

The result is a recessed area with cavities leading to the formation of surface defects
This phenomenon is especially serious for first layers that are too thin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The method is described in more detail below.

[0023] The method of making a shell mold includes a first step of making a master mold from wax or another similar material known in the art. The most commonly used is wax. Depending on the type of part, multiple masters can be grouped together to make multiple molds at the same time. 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.

[0024] The manufacturing steps of the shell are preferably performed by a robot whose actions are controlled by a program that optimizes the quality of the deposition and makes the blades and shrouds of different geometries non-cracking.

[0025] Simultaneous preparation of the styling paint and continuous quenching of the master tool or sets of master tools to deposit the ceramic material.

[0026] The composition of the first modeling paint by weight percentage is as follows:

[0027] -Malusite powder 65-...

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PUM

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Abstract

A dewaxing casting technology using contact layer for preparing the multi-layer ceramic shell mould including a mother mould made of wax or its similar material and at least one contact layer includes such steps as dipping said mother mould in a modeling paint containing ceramic particles and adhesive to form a contact layer, depositing black particles on said contact layer, and drying.

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 quenched in a first build 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. Subsequent quenching operations are repeated on the styling paint, which may differ in composition, each quenching ope...

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S·法尔格斯
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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