A kind of manufacturing method of ceramic core free end wax cap

A technology of ceramic cores and manufacturing methods, which is applied in the direction of cores, manufacturing tools, casting molds, etc., can solve problems such as uneven gaps, increased production costs, broken cores, etc., and achieve high consistency of wax layer thickness and uniform gaps. The effect of controlling and reducing production time

Active Publication Date: 2021-07-23
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems: when the wax layer is brushed manually, the thickness is affected by the temperature of the wax liquid, viscosity, coating properties, operator techniques, etc., and the free end will be made irregularly, and the ceramic cores made by different operators and different castings will be free. There are differences in the thickness and size of the ends. After dewaxing, the gap between the ceramic core and the casting formwork will be uneven, which may cause broken cores during the pouring process.
In addition, because the free end of the ceramic core is made by hand, the wax mold trimming time of the casting is increased, which increases the production cost

Method used

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  • A kind of manufacturing method of ceramic core free end wax cap

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Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: The steps of the method for making the free end wax cap of a ceramic core of a certain turbine working blade are as follows:

[0036] 1) Design the free end of the ceramic core: design the production plan for the free end of the ceramic core according to the structure of the working blade, the structure of the ceramic core, the metal material, and the pouring method, and determine that the tip of the blade is the fixed end, and the tenon is the free end. Wax caps are made at both ends of the ceramic core beam with a thickness of 0.5mm.

[0037] 2) According to the free end of the ceramic core designed in 1), process the space required by the size of the wax cap at the free end wax cap of the ceramic core corresponding to the inner cavity of the existing casting wax mold mold;

[0038] 3) Put the ceramic core into the casting wax mold as required, inject the wax material according to the wax mold pressing parameters and maintain the pressure, open the mold,...

Embodiment 2

[0042] Embodiment 2: The steps of the method for making the free end wax cap of a ceramic core of a certain turbine guide vane are as follows:

[0043] 1) Design the free end of the ceramic core: Design the manufacturing plan for the free end of the ceramic core according to the structure of the guide vane, the structure of the ceramic core, the metal material, and the pouring method, and determine that the lower edge plate of the guide vane is the fixed end, and the upper edge plate is For the free end, make a wax cap at the end of the ceramic core at the upper edge plate, with a thickness of 0.5mm.

[0044] 2) According to the free end of the ceramic core designed in step 1, process the space required by the size of the wax cap at the free end wax cap of the ceramic core corresponding to the inner cavity of the existing casting wax mold mold;

[0045] 3) Put the ceramic core into the casting wax mold as required, inject the wax material according to the wax mold pressing par...

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Abstract

The invention discloses a method for manufacturing a wax cap at the free end of a ceramic core, comprising the following steps: designing the free end of the ceramic core; At the wax cap, process the space required by the size of the wax cap; put the ceramic core into the casting wax mold, inject wax into the mold and keep the pressure; take out the wax mold with the ceramic core. The invention replaces the previous method of pressing the wax mold and then manually brushing the wax to make the free-end wax cap. The method of the invention reduces production time. At the wax cap at the free end of the ceramic core corresponding to the inner cavity of the casting wax mold, process the space required by the size of the wax cap, put the ceramic core into the casting wax mold, inject wax into the mold and keep the pressure, and the mold is pressed The wax cap is more regular, the size of the wax cap and the thickness of the wax layer are more consistent, and the gap between the corresponding ceramic core and the mold shell is uniform and controllable, which can reduce the core breaking rate during pouring.

Description

technical field [0001] The invention belongs to the field of investment precision casting, and in particular relates to a method for manufacturing a wax cap at the free end of a ceramic core. Background technique [0002] At present, the free end of the ceramic core is generally made after the wax mold is pressed and before the module is assembled. The free end is made by brushing or waxing. The operator brushes the wax manually, which is simple, convenient and fast. However, this method has the following problems: when the wax layer is brushed manually, the thickness is affected by the temperature of the wax liquid, viscosity, coating properties, operator techniques, etc., and the free end will be made irregularly, and the ceramic cores made by different operators and different castings will be free. There are differences in the thickness and size of the ends. After dewaxing, the gap between the ceramic core and the casting formwork will be uneven, which may cause core brea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C7/02B22C9/04B22C9/10
CPCB22C7/02B22C9/04B22C9/10
Inventor 董茵李琳武晓刚常涛岐梁晓锋周宝玲王斌俞洲
Owner AECC AVIATION POWER CO LTD
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