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Investment casting of hollow components

A technology of castings and processing methods, applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve problems such as errors and achieve the effect of structural changes

Inactive Publication Date: 2016-07-20
FLC FLOWCASTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Internal errors due to known factors

Method used

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  • Investment casting of hollow components
  • Investment casting of hollow components
  • Investment casting of hollow components

Examples

Experimental program
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Effect test

Embodiment Construction

[0068] By using casting parts with 2 ( Figure 7 ) of the digital geometric coordinate system (not shown) of the 3D model, refer to figure 1 , during an initial method step, the core 4 is machined according to the 3D model in the first CNC-machining method, ie by CNC-milling (not shown).

[0069] refer to figure 2 , the core 4 is positioned in the machining fixture 6 when the next process step is performed. The volume 8 is arranged around the mandrel and, at the same time, positioned and fixed in the machining holder 6 .

[0070] refer to image 3 , during the next method step, the mold wax 10 is cast around the core 4 into the volume 108 . The volume 8 is larger than the casting volume 12 , and the modeling wax 10 is cast around the core 4 into the volume 8 along the sides of the casting volume 12 . By the position of the core 4 in the machining holder 6, according to the cast part 2 (see Figure 7 ) of the 3D model (not shown) to determine the spatial position of the...

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Abstract

The invention relates to a method for producing a cast component which has cavity structures, using a 3D pattern of digital geometrical coordinates of the cast component by means of a ceramic mold, said method comprising the following steps: a) producing the core according to the 3D pattern by CNC technology in a first CNC production method; b) positioning the core in a treatment support; c) casting the pattern material around the core in a volume that is larger than the cubature of the cast component which according to the 3D pattern is spatially defined by the position of the core in the treatment support, and allowing the pattern material to solidify; d) producing an outer contour of a disposable pattern of the cast component from the solidified pattern material around the core according to the 3D pattern by CNC technology in a second CNC production method; e) applying a ceramic mold to the outer contour of the disposable pattern and forming a positioning connection of the ceramic mold and the treatment support; f) removing the disposable pattern from the ceramic mold around the core in the treatment support; g) casting metal into the ceramic mold around the core in the treatment support; h) allowing the molten metal to solidify to the solid cast component and i) removing the ceramic mold and the core from the cast component.

Description

technical field [0001] The invention relates to a method in the field of precision casting for the production of cast parts having hollow structures, which is carried out by means of ceramic molds. Background technique [0002] Existing precision casting techniques use disposable models (verlorenenModells) in disposable molds (verlorenenForm), which are designed externally to form the ceramic coating of the disposable model. Existing methods include the following steps: [0003] - Machining of a positive Model (positive Modell) made of hard or elastic material (of the same configuration as the casting to be produced); [0004] -Through the model, the transition mold is made after casting the liquid, and cooled to solidification; [0005] - extract model; [0006] - by casting a second liquid in the cavity, forming the transition pattern and cooling until it solidifies; [0007] - the transition mold melts or dissolves; [0008] - ceramic coating of the transition model ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/10
CPCB22C7/02B22C9/108B22C9/10B22D29/001Y02P10/25B33Y10/00B33Y80/00
Inventor 海科·席林
Owner FLC FLOWCASTINGS
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