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Manufacturing process of an aluminum alloy investment casting mold shell with inlaid steel pipe parts

An investment casting and aluminum alloy technology, which is applied to casting molding equipment, casting molds, and casting mold components, can solve the problems of easy fire leakage of castings, complicated coating process, easy penetration of molten metal, etc., and achieve good sealing, Avoid running out, the effect of uniform texture

Active Publication Date: 2018-04-06
GUIZHOU ANJI AVIATION PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a manufacturing process of an aluminum alloy investment casting with inlaid steel pipe fittings to solve the problems of complex coating process, high difficulty, and molten metal in the traditional molding process when the structure with inlays is encountered in the manufacturing process. Easy to infiltrate into inserts, easy to run out of fire in castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Firstly seal the opening at one end of the steel pipe fitting with surface layer slurry, then fill the steel pipe fitting with 60 mesh mullite sand and compact it, and then use the surface layer slurry to seal the opening at the other end of the steel pipe fitting to make the steel pipe fitting Both ends are sealed; steel pipe parts are dried naturally or with hot air until the water content of the surface layer is 5%. Sol and 320-mesh white corundum powder, the thickness of the surface layer is 10mm; after the surface layer is coated and hung, it is dried naturally or with hot air until its water content is 5%. The temperature of hot air drying is 85 °C and the wind speed is 1m / s; Apply a layer of transition layer evenly on the surface of the surface layer, the transition layer is made of silica sol and 60 mesh mullite sand, the thickness of the transition layer is 5mm; after the transition layer is coated and hung, it is naturally dried to make the water con...

Embodiment 2

[0025] Example 2: Firstly seal the opening at one end of the steel pipe fitting with surface layer slurry, then fill the steel pipe fitting with 60 mesh mullite sand and compact it, and then use the surface layer slurry to seal the opening at the other end of the steel pipe fitting to make the steel pipe fitting Both ends are sealed; steel pipe parts are dried naturally or with hot air until the water content of the surface layer is 4%. The temperature of hot air drying is 60°C and the wind speed is 1m / s; Sol and 320-mesh white corundum powder, the thickness of the surface layer is 5mm; after the surface layer is coated and hung, it is dried naturally or with hot air until its water content is 4.5%. The temperature of hot air drying is 60°C and the wind speed is 1m / s; Apply a layer of transition layer evenly on the surface of the surface layer. The transition layer is made of silica sol and 60 mesh mullite sand. The thickness of the transition layer is 3mm; after the transition...

Embodiment 3

[0026] Example 3: Firstly seal the opening at one end of the steel pipe fitting with surface layer slurry, then fill the steel pipe fitting with 60 mesh mullite sand and tamp it down, and then use the surface layer slurry to seal the opening at the other end of the steel pipe fitting to make the steel pipe fitting Both ends are sealed; the steel pipe parts are dried naturally or with hot air until the moisture content of the surface layer is 4.2%. Sol and 320 mesh white corundum powder are prepared, the thickness of the surface layer is 7mm; after the surface layer is coated and hung, it is dried naturally or with hot air until its water content is 3.8%. The temperature of hot air drying is 68°C and the wind speed is 2m / s; Apply a layer of transition layer evenly on the surface of the surface layer, the transition layer is made of silica sol and 60 mesh mullite sand, the thickness of the transition layer is 4mm; after the transition layer is coated and hung, it is naturally dri...

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Abstract

The invention discloses a process for manufacturing a shell with an embedded steel pipe through aluminum alloy investment casting. The process comprises the steps of smearing of the steel pipe, drying of the steel pipe, smearing of a shell surface layer, drying of the surface layer, smearing of a transition layer, drying of the transition layer, smearing of a coarse sand layer, drying, roasting, cleaning and drying, splicing combination and the like. The problems that in the manufacturing process of a traditional shell, when the structure with an embedded part exists, the coating process is complex, difficulty is high, molten metal easily permeates the embedded part, and run-out is prone to happening in a casting can be effectively solved; meanwhile, the shell manufactured through the process has the advantages of being high in strength, good in leakproofness, uniform in texture and the like, the problem that molten aluminum leaks into the steel pipe is avoided, and the problem of run-out inside the casting is also avoided.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a manufacturing process of a mold shell, in particular to a manufacturing process of an aluminum alloy investment casting mold shell with inlaid steel pipe fittings. Background technique [0002] The investment casting process refers to making a model with wax, wrapping a layer of refractory material such as clay on the outside, heating the wax to melt and flow out, so as to obtain a shell formed by refractory material, and then pour the metal into the shell after melting. After the metal is cooled, the shell is removed to obtain a metal mold. This process of processing metal is called investment casting, also known as investment casting or lost wax casting. [0003] Aluminum alloy investment castings are mostly used in aviation parts, which can adapt to different structural requirements and have a wide variety. At present, some workpieces need to be embedded with a pi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C9/24
CPCB22C9/04B22C9/24
Inventor 陈绍午
Owner GUIZHOU ANJI AVIATION PRECISION CASTING