Method for solving layering of wax mold and mold core of precision casting

A precision casting and wax mold technology, which is applied in the field of precision casting, can solve the problems of casting inner passages not pouring, and achieve the effects of reducing raw material and labor waste, saving production costs, and shortening the production cycle

Pending Publication Date: 2022-07-05
AECC AVIATION POWER CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the delamination problem of wax molds and cores of precision castings in the prior art, the purpose of the present invention is to provide a method for solving the delamination of wax molds and cores of precision castings. The gap is tightly sealed, which successfully prevents the paint slurry from entering the gap between the wax mold and the ceramic core, and then adheres to the surface of the ceramic core to form a local redundant shell, which completely solves the problem that the inner channel of the casting cannot be partially poured

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for solving layering of wax mold and mold core of precision casting
  • Method for solving layering of wax mold and mold core of precision casting
  • Method for solving layering of wax mold and mold core of precision casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment takes a radial vortex device with a venturi as an example, and the method for improving the surface quality of the inner channel of the casting is carried out according to the following steps:

[0045] Step 1. Use a conventional method to manufacture a ceramic core.

[0046] Step 2. Use conventional methods to press the wax mold. Among them, injection pressure: 10bar; pressure holding time: 10s.

[0047] Step 3. Perform X-ray inspection on the wax model; trim the wax model.

[0048] Step 4. Prepare free end paint, including the following steps:

[0049] Step 4.1, soak 10 g of malachite green in 500 ml of acetone for 24 hours to obtain a saturated malachite green acetone solution.

[0050]During use, acetone was added to the saturated malachite green acetone solution containing malachite green crystals. When there are no malachite green crystals in the acetone containing malachite green, 10 g of malachite green should be added to the bottle to make th...

Embodiment 2

[0063] This embodiment takes the radial vortex device with a venturi tube in a scientific research machine as an example, and the method for improving the surface quality of the inner channel of the casting is carried out according to the following steps:

[0064] Step 1. Use a conventional method to manufacture a ceramic core.

[0065] Step 2. Use conventional methods to press the wax mold. Among them, injection pressure: 5bar; pressure holding time: 15s.

[0066] Step 3. Perform X-ray inspection on the wax model; trim the wax model.

[0067] Step 4. Prepare free end paint, including the following steps:

[0068] Step 4.1, soak 12 g of malachite green in 500 ml of acetone for 24 hours to obtain a saturated malachite green acetone solution.

[0069] During use, acetone was added to the saturated malachite green acetone solution containing malachite green crystals. When there are no malachite green crystals in the acetone containing malachite green, 12 g of left malachite g...

Embodiment 3

[0081] In this embodiment, a radial vortex device of a certain machine is taken as an example, and the method for improving the surface quality of the inner channel of the casting is carried out according to the following steps:

[0082] Step 1. Use a conventional method to manufacture a ceramic core.

[0083] Step 2. Use conventional methods to press the wax mold. Among them, injection pressure: 8bar; pressure holding time: 10s

[0084] Step 3, trim the wax model.

[0085] Step 4. Prepare free end paint, including the following steps:

[0086] Step 4.1, soak 11 g of malachite green in 500 ml of acetone for 24 hours to obtain a saturated malachite green acetone solution.

[0087] During use, acetone was added to the saturated malachite green acetone solution containing malachite green crystals. When there are no malachite green crystals in the acetone containing malachite green, 11 g of malachite green should be added to the bottle to make the malachite green in the aceton...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for solving layering of a wax mold and a mold core of a precision casting. The method comprises the following steps that the free end of a ceramic core and a gap between the ceramic core and the wax mold are sealed through free end paint; the free end paint is prepared by adding methyl varnish into a saturated malachite green acetone solution and uniformly mixing, and the viscosity range of the free end paint is 16.5-18.5 s. The free end paint is prepared to seal the gap between the wax mold and the ceramic core, so that the situation that coating slurry enters the gap between the wax mold and the ceramic core and then adheres to the surface of the ceramic core to form a local redundant shell is successfully avoided, and the problem that a channel in a casting cannot be locally poured is thoroughly solved.

Description

technical field [0001] The invention belongs to the technical field of precision casting, and mainly relates to a precision casting method for precision castings whose inner cavity structure is formed by a ceramic core, in particular to a method for solving the delamination of precision casting wax molds and cores. Background technique [0002] As the heart of an aircraft, aero-engines directly affect the reliability and economy of the aircraft, and are also an important manifestation of a country's scientific and technological level and national defense strength. The precision casting of complex inner cavity structures of key components such as turbine blades and vortexers requires ceramic core molding. The wax mold with ceramic core deforms slightly after cooling and shrinks, forming a small gap between the ceramic core and the wax mold. During the shell making process, the surface layer slurry will enter the gap between the wax mold and the ceramic core along the circumfe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/12B22C7/02B22C9/22B22C9/04
CPCB22C9/12B22C7/02B22C9/22B22C9/04Y02P10/20
Inventor 牛建平尹冬梅尚相男朱珍珠段朋国穆森种艳茹王玮
Owner AECC AVIATION POWER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap