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Casting method for casting high-end large precision castings

A precision casting and large-scale technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of difficult to produce high-quality products, inability to balance large and fine castings, environmental pollution, etc., and achieve less casting defects , good quality, and the effect of avoiding air pollution

Active Publication Date: 2020-06-12
河南圣得威机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems in the existing lost foam casting process that there are defects in the internal quality of castings, it is difficult to produce high-quality products, there is environmental pollution (including exhaust gas and waste residue), and the problems of large-scale and fine casting cannot be taken into account. It can cast high-quality castings without defects such as carburization, pores, slag inclusions, and wrinkled skins. It can meet the requirements of high-end, complex structures, and precision castings. It is a green, environmentally friendly, and pollution-free casting method for casting high-end large-scale precision castings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a casting method for casting high-end large precision castings, comprising the following steps:

[0032] Step 1) Molding:

[0033] Step 1.1) Make a polystyrene foam white mold consistent with the casting entity;

[0034] Step 1.2) Check the density and appearance quality of the EPS white mold, smooth the surface protrusions with fine sandpaper, fill the surface holes with modification paste, and smooth the loose surface with modification liquid and smooth with fine sandpaper;

[0035] Step 1.3) Bond the gate and riser according to the casting process diagram, and if necessary, set cold iron or cooling measures at the hot joint as required;

[0036] Step 1.4) Reinforce the easily deformable parts of the polystyrene foam white mold, place the white mold on a flat plate or tooling, and use fiber rods, refractory cloth or ceramic strips to correct and reinforce it to prevent deformation; the outline of the white mold If the size is greater than 1000mm or the...

Embodiment 2

[0050] Embodiment 2, a casting method for casting high-end large precision castings, comprising the following steps:

[0051] Step 1) Molding:

[0052] Step 1.1) Make a polystyrene foam white mold consistent with the casting entity;

[0053] Step 1.2) Check the density and appearance quality of the EPS white mold, smooth the surface protrusions with fine sandpaper, fill the surface holes with modification paste, and smooth the loose surface with modification liquid and smooth with fine sandpaper;

[0054] Step 1.3) Bond the gate and riser according to the casting process diagram, and if necessary, set cold iron or cooling measures at the hot joint as required;

[0055] Step 1.4) Reinforce the easily deformable parts of the polystyrene foam white mold, place the white mold on a flat plate or tooling, and use fiber rods, refractory cloth or ceramic strips to correct and reinforce it to prevent deformation; the outline of the white mold If the size is greater than 1000mm or the...

Embodiment 3

[0069] Embodiment 3, a casting method for casting high-end large precision castings, comprising the following steps:

[0070] Step 1) Molding:

[0071] Step 1.1) Make a polystyrene foam white mold consistent with the casting entity;

[0072] Step 1.2) Check the density and appearance quality of the EPS white mold, smooth the surface protrusions with fine sandpaper, fill the surface holes with modification paste, and smooth the loose surface with modification liquid and smooth with fine sandpaper;

[0073] Step 1.3) Bond the gate and riser according to the casting process diagram, and if necessary, set cold iron or cooling measures at the hot joint as required;

[0074] Step 1.4) Reinforce the easily deformable parts of the polystyrene foam white mold, place the white mold on a flat plate or tooling, and use fiber rods, refractory cloth or ceramic strips to correct and reinforce it to prevent deformation; the outline of the white mold If the size is greater than 1000mm or the...

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Abstract

The invention relates to the technical field of lost foam casting, in particular to a casting method for casting high-end large precision castings. The casting method adopts a special shell mold, cancast high-quality castings without defects like recarburization, pores, slag inclusion and skin wrinkling, can meet high-grade, complex-structure and precision casting requirements and is environment-friendly and pollution-free. The casting method includes steps: making a mold, coating the surface of a blank mold with shell mold paint, drying, melting the mold to make a shell, boxing the shell mold, and pouring at negative pressure. The casting method has the advantages of being capable of casting the high-quality castings without the defects like recarburization, pores, slag inclusion and skin wrinkling and meeting high-grade, complex-structure and precision casting requirements and being environment-friendly and pollution-free.

Description

technical field [0001] The present invention relates to the field of casting molding and the technical field of lost foam casting, especially relates to the use of special shell molds, which can cast high-quality castings without defects such as carburization, pores, slag inclusions, and wrinkled skins, and can meet the requirements of high-grade, complex structures, A green, environmentally friendly, and pollution-free casting method for casting high-end large precision castings required by precision castings. Background technique [0002] Lost Foam Casting is a technology for precise molding of liquid metal with almost no margin, and is considered as "new casting technology in the 21st century" and "green engineering in casting". Lost foam casting has been accepted and recognized by the foundry industry because of its high dimensional accuracy, good surface finish, wide process adaptability, simple operation, and can greatly improve the labor intensity and environment of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C3/00B22D18/04
CPCB22C3/00B22C9/043B22D18/04
Inventor 戴威贾建英王克霞
Owner 河南圣得威机械科技有限公司
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