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Low pressure casting method for lattice sandwich plate

A low-pressure casting and sandwich panel technology, used in casting molding equipment, molds, cores, etc., can solve the problems of high defect rate and difficulty in forming lattice sandwich panels, achieving low defect rate, complete molding, Good overall casting formability

Inactive Publication Date: 2010-05-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of difficulty in complete molding and high defect rate of the lattice sandwich panel obtained by the existing preparation method, and the present invention provides a low-pressure casting method of the lattice sandwich panel

Method used

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  • Low pressure casting method for lattice sandwich plate
  • Low pressure casting method for lattice sandwich plate
  • Low pressure casting method for lattice sandwich plate

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0010] Embodiment 1: The low-pressure casting method of the lattice sandwich panel in this embodiment is realized through the following steps: 1. The wax mold of the lattice sandwich panel is prepared by using fused deposition rapid prototyping equipment; 2. On the surface layer of the wax mold Apply ceramic slurry evenly, then dry at 18-22°C for 20-24 hours, then evenly sprinkle a layer of zirconia sand, then apply ceramic slurry evenly on the adjacent surface layer of the wax model, and then dry at 18-22°C After 20 to 24 hours, sprinkle a layer of zirconia sand evenly. The ceramic slurry applied on the surface layer is obtained by uniformly mixing zirconia and silica sol in a mass ratio of 4.5:1. The ceramic slurry applied on the adjacent surface layer It is obtained by uniformly mixing zirconium dioxide and silica sol at a mass ratio of 4.0:1; 3. Apply ceramic slurry evenly on the back layer of the wax model, then dry at 18-22°C for 3-8 hours, and then evenly spread A layer...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that the model of the fused deposition rapid prototyping equipment in step 1 is FDM3000. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, evenly apply ceramic slurry on the surface layer of the wax model, and then evenly sprinkle a layer of zirconia sand after drying at 20°C for 22 hours. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a low pressure casting method for a lattice sandwich plate and relates to a method for manufacturing the lattice sandwich plate. The invention solves the problems, such as difficult complete formation and high defect rate of the lattice sandwich plate resulted from the current manufacturing methods. The method according to the invention comprises the steps: producing a wax pattern, pasting and drying the surface, the adjacent surface and the back of the wax pattern; heating and demoulding the wax pattern to obtain the profile shell of the lattice sandwich plate; and in the end, obtaining the lattice sandwich plate by lifting, filling and pressure maintaining with a low pressure casting machine. The method combines investment pattern precision casing technique, rapid prototyping manufacturing technique with low pressure casing technique so as to result in the lattice sandwich plate with complete formation and low defect rate.

Description

technical field [0001] The invention relates to a preparation method of a lattice sandwich panel. Background technique [0002] In recent years, with the rapid development of the aerospace industry, higher and higher requirements have been placed on the quality and performance of the materials used. At present, lightweight structural materials such as honeycomb sandwich materials, foam materials, and porous solids have been widely concerned and favored in the design of aerospace vehicles due to their comprehensive functions such as light weight, high specific strength, high specific stiffness, and impact resistance. At the same time, the use of the load-bearing structure of the open-cell metal foam material is limited by its elastic modulus and strength, and its strength and density are exponentially related, which makes it much inferior to the honeycomb material of the same density, and the structure of the honeycomb material is difficult to realize its Versatility. Combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D25/06B22D18/04B22D18/08B22C9/04B22C3/00
Inventor 魏文庆王宏伟李敏魏尊杰
Owner HARBIN INST OF TECH
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