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Core die with variable pins and process for producing a core

a technology of core die and variable pin, applied in the field of core die, can solve the problems of high cost and complexity

Inactive Publication Date: 2012-05-17
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to solve the problem of overheating during the process of manufacturing a core die. The solution is achieved through a core die and a process that helps to prevent overheating. The dependent claims provide further advantageous measures that can be combined to achieve even more benefits.

Problems solved by technology

To date, this has been done either by reworking the core die completely and therefore expensively, or by producing a new and more expensive core die in each case.
This is expensive and complex at the same time.

Method used

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  • Core die with variable pins and process for producing a core
  • Core die with variable pins and process for producing a core
  • Core die with variable pins and process for producing a core

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0014]FIG. 1 schematically shows a core die 1.

[0015]The core die 1 has at least two halves, here an upper half 3 and a lower half 4, between which a cavity 2 is formed.

[0016]Pins 5 are present between the halves 3, 4 of the core die 1 and here are preferably formed in two parts as pin parts 8, 11.

[0017]However, they can also be formed as single-part pins 9 (FIG. 2).

[0018]The core die halves 3, 4 have protuberances 13, 13′, to which the upper pin part 8 and the lower pin part 11 or the pin 9 (FIG. 2) are preferably fastened. This can be effected by mechanical interlocking, soldering or welding. The pin parts 8, 11 are arranged directly opposite in pairs and preferably make contact with one another.

[0019]The same fastening is employed for the single-part pin 9 (FIG. 2).

[0020]The shape and size of these pins 8 (FIG. 1), 9 (FIG. 2) here also determine the flow of a cooling medium (the mass flow of cooling air) through a hollow cast turbine component, in particular through a turbine blad...

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Abstract

A core die is provided. The core die includes a first half and a second half where a cavity is formed between the two. Pins are arranged on the halves and the pins are replaceable. By virtue of the modular inner structure of a core die, the core die may be matched to the desired changes of the core, by small changes, more quickly and more easily than would be the case if the core die had only one part or if the pins were a fixed component of the core die halves.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority of European Patent Office application No. 01018784.0 EP filed Oct. 18, 2010, which is incorporated by reference herein in its entirety.FIELD OF INVENTION[0002]The invention relates to a core die with replaceable pins and to a process for producing a core.BACKGROUND OF INVENTION[0003]When producing a ceramic casting mold, use is made of core dies for the production of a ceramic core which emboss the core on certain inner structures, e.g. a continuous connection of outer walls or two inner walls.[0004]These inner struts also represent a flow resistance and, in the case of hollow components which are produced by means of such a core, also influence the flow of the cooling air and the transfer of heat into the cooling air.[0005]When producing a core for a turbine blade or vane, a plurality of development iterations are often needed so as to produce the core in such a manner that it corresponds to the required ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B22D45/00B21K21/16
CPCB22C7/06Y10T29/49716B22C9/10
Inventor AHMAD, FATHIESSER, WINFRIEDGAIO, GIUSEPPEHECKEL, WALDEMARKUPERKOCH, RUDOLFLUSEBRINK, OLIVERMATTHEIS, THORSTENMILAZAR, MIRKOMOL, ARTURPAUL, UWERICKEN, OLIVERSCHNEIDER, OLIVER
Owner SIEMENS AG