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Sand mold line forming and laying method

A wire forming and sand mold technology, applied in the field of sand mold manufacturing, can solve the problems of low efficiency and high binder content, and achieve the effect of improving the forming speed

Inactive Publication Date: 2016-07-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When making sand molds for large castings, the efficiency is low. Compared with the traditional sand mold making process, the existing moldless casting equipment uses the method of spraying binder, which makes the binder content higher

Method used

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  • Sand mold line forming and laying method
  • Sand mold line forming and laying method
  • Sand mold line forming and laying method

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, in this embodiment, the printing plane is first gridded and a layered sand mold 3D grid model is established to generate grid filling information, and then laid layer by layer. When laying each layer of grid, the printing plane is scanned horizontally According to the grid filling information, the blanking nozzles arranged in a vertical row fill the corresponding grid with molding sand or auxiliary molding sand. The specific steps are as follows:

[0030] 1) Mesh the printing plane, divide the printing plane into a grid according to the requirements of molding accuracy.

[0031] 2) Establish a 3D mesh model of the sand mold and generate mesh filling information:

[0032] 2.1) Generate a three-dimensional model of the sand mold. The 3D model is generated by 3D modeling software and saved as an STL file.

[0033] 2.2) Slice the 3D model, mesh the slice and correspond to the printing plane to form a 3D mesh model. Slic3r software was used to ...

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Abstract

Provided is a sand mold line forming and laying method. Firstly, a printing plane is meshed, a layered sand mold three-dimensional mesh model is built, mesh filling information is generated, then meshes are laid layer by layer, the printing plane conducts transverse scanning movement when each layer of mesh is laid, and blanking nozzles which are longitudinally arranged in columns are used for filling the corresponding meshes with molding sand or auxiliary molding sand according to the mesh filling information. The scanning printing mode from line to face is adopted, the meshes can be filled by dynamically selecting materials, the forming speed of a sand mold is increased, and the method is suitable for production and manufacturing of large-scale casting sand molds.

Description

technical field [0001] The invention relates to a technology in the field of sand mold manufacturing, in particular to a sand mold line forming and laying method. Background technique [0002] The existing sand mold printing methods can be divided into filling the molding area by tracking and scanning the trajectory, using the nozzle array to spray the binder to fill the molding area, and after laying the molding sand layer by layer, the filling area needs to be cut off layer by layer using numerical control (CNC) technology. These methods all lay sand molds from point to line, and then from line to surface. When making sand molds for large castings, it takes a lot of time and the efficiency is low. [0003] After searching the prior art, it was found that the Chinese Patent Document No. CN104985116A, published on October 21, 2015, discloses a method for rapid manufacturing of moldless molds. The method is to cool the temperature of the molding sand to -40°C to - 10°C, in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/00
CPCB22C7/00
Inventor 郭为忠赵冬华张白冰高峰
Owner SHANGHAI JIAO TONG UNIV